FFmpeg
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  * Copyright (c) 2021 Nachiket Tarate
6  *
7  * This file is part of FFmpeg.
8  *
9  * FFmpeg is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License as published by the Free Software Foundation; either
12  * version 2.1 of the License, or (at your option) any later version.
13  *
14  * FFmpeg is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17  * Lesser General Public License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with FFmpeg; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22  */
23 
24 /**
25  * @file
26  * Apple HTTP Live Streaming demuxer
27  * https://www.rfc-editor.org/rfc/rfc8216.txt
28  */
29 
30 #include "libavformat/http.h"
31 #include "libavutil/avstring.h"
32 #include "libavutil/avassert.h"
33 #include "libavutil/intreadwrite.h"
34 #include "libavutil/mathematics.h"
35 #include "libavutil/opt.h"
36 #include "libavutil/dict.h"
37 #include "libavutil/time.h"
38 #include "avformat.h"
39 #include "internal.h"
40 #include "avio_internal.h"
41 #include "id3v2.h"
42 
43 #include "hls_sample_encryption.h"
44 
45 #define INITIAL_BUFFER_SIZE 32768
46 
47 #define MAX_FIELD_LEN 64
48 #define MAX_CHARACTERISTICS_LEN 512
49 
50 #define MPEG_TIME_BASE 90000
51 #define MPEG_TIME_BASE_Q (AVRational){1, MPEG_TIME_BASE}
52 
53 /*
54  * An apple http stream consists of a playlist with media segment files,
55  * played sequentially. There may be several playlists with the same
56  * video content, in different bandwidth variants, that are played in
57  * parallel (preferably only one bandwidth variant at a time). In this case,
58  * the user supplied the url to a main playlist that only lists the variant
59  * playlists.
60  *
61  * If the main playlist doesn't point at any variants, we still create
62  * one anonymous toplevel variant for this, to maintain the structure.
63  */
64 
65 enum KeyType {
69 };
70 
71 struct segment {
72  int64_t duration;
73  int64_t url_offset;
74  int64_t size;
75  char *url;
76  char *key;
78  uint8_t iv[16];
79  /* associated Media Initialization Section, treated as a segment */
81 };
82 
83 struct rendition;
84 
89 };
90 
91 /*
92  * Each playlist has its own demuxer. If it currently is active,
93  * it has an open AVIOContext too, and potentially an AVPacket
94  * containing the next packet from this stream.
95  */
96 struct playlist {
99  uint8_t* read_buffer;
105  int index;
109 
110  /* main demuxer streams associated with this playlist
111  * indexed by the subdemuxer stream indexes */
114 
115  int finished;
118  int64_t start_seq_no;
120  struct segment **segments;
121  int needed;
122  int broken;
123  int64_t cur_seq_no;
124  int64_t last_seq_no;
126  int64_t cur_seg_offset;
127  int64_t last_load_time;
128 
129  /* Currently active Media Initialization Section */
131  uint8_t *init_sec_buf;
132  unsigned int init_sec_buf_size;
133  unsigned int init_sec_data_len;
135 
137  uint8_t key[16];
138 
139  /* ID3 timestamp handling (elementary audio streams have ID3 timestamps
140  * (and possibly other ID3 tags) in the beginning of each segment) */
141  int is_id3_timestamped; /* -1: not yet known */
142  int64_t id3_mpegts_timestamp; /* in mpegts tb */
143  int64_t id3_offset; /* in stream original tb */
144  uint8_t* id3_buf; /* temp buffer for id3 parsing */
145  unsigned int id3_buf_size;
146  AVDictionary *id3_initial; /* data from first id3 tag */
147  int id3_found; /* ID3 tag found at some point */
148  int id3_changed; /* ID3 tag data has changed at some point */
149  ID3v2ExtraMeta *id3_deferred_extra; /* stored here until subdemuxer is opened */
150 
152 
153  int64_t seek_timestamp;
155  int seek_stream_index; /* into subdemuxer stream array */
156 
157  /* Renditions associated with this playlist, if any.
158  * Alternative rendition playlists have a single rendition associated
159  * with them, and variant main Media Playlists may have
160  * multiple (playlist-less) renditions associated with them. */
163 
164  /* Media Initialization Sections (EXT-X-MAP) associated with this
165  * playlist, if any. */
168 };
169 
170 /*
171  * Renditions are e.g. alternative subtitle or audio streams.
172  * The rendition may either be an external playlist or it may be
173  * contained in the main Media Playlist of the variant (in which case
174  * playlist is NULL).
175  */
176 struct rendition {
183 };
184 
185 struct variant {
187 
188  /* every variant contains at least the main Media Playlist in index 0 */
190  struct playlist **playlists;
191 
195 };
196 
197 typedef struct HLSContext {
198  AVClass *class;
201  struct variant **variants;
203  struct playlist **playlists;
206 
207  int64_t cur_seq_no;
212  int64_t cur_timestamp;
223 } HLSContext;
224 
225 static void free_segment_dynarray(struct segment **segments, int n_segments)
226 {
227  int i;
228  for (i = 0; i < n_segments; i++) {
229  av_freep(&segments[i]->key);
230  av_freep(&segments[i]->url);
231  av_freep(&segments[i]);
232  }
233 }
234 
235 static void free_segment_list(struct playlist *pls)
236 {
238  av_freep(&pls->segments);
239  pls->n_segments = 0;
240 }
241 
242 static void free_init_section_list(struct playlist *pls)
243 {
244  int i;
245  for (i = 0; i < pls->n_init_sections; i++) {
246  av_freep(&pls->init_sections[i]->url);
247  av_freep(&pls->init_sections[i]);
248  }
249  av_freep(&pls->init_sections);
250  pls->n_init_sections = 0;
251 }
252 
254 {
255  int i;
256  for (i = 0; i < c->n_playlists; i++) {
257  struct playlist *pls = c->playlists[i];
258  free_segment_list(pls);
260  av_freep(&pls->main_streams);
261  av_freep(&pls->renditions);
262  av_freep(&pls->id3_buf);
263  av_dict_free(&pls->id3_initial);
265  av_freep(&pls->init_sec_buf);
266  av_packet_free(&pls->pkt);
267  av_freep(&pls->pb.pub.buffer);
268  ff_format_io_close(c->ctx, &pls->input);
269  pls->input_read_done = 0;
270  ff_format_io_close(c->ctx, &pls->input_next);
271  pls->input_next_requested = 0;
272  if (pls->ctx) {
273  pls->ctx->pb = NULL;
274  avformat_close_input(&pls->ctx);
275  }
276  av_free(pls);
277  }
278  av_freep(&c->playlists);
279  c->n_playlists = 0;
280 }
281 
283 {
284  int i;
285  for (i = 0; i < c->n_variants; i++) {
286  struct variant *var = c->variants[i];
287  av_freep(&var->playlists);
288  av_free(var);
289  }
290  av_freep(&c->variants);
291  c->n_variants = 0;
292 }
293 
295 {
296  int i;
297  for (i = 0; i < c->n_renditions; i++)
298  av_freep(&c->renditions[i]);
299  av_freep(&c->renditions);
300  c->n_renditions = 0;
301 }
302 
303 static struct playlist *new_playlist(HLSContext *c, const char *url,
304  const char *base)
305 {
306  struct playlist *pls = av_mallocz(sizeof(struct playlist));
307  if (!pls)
308  return NULL;
309  pls->pkt = av_packet_alloc();
310  if (!pls->pkt) {
311  av_free(pls);
312  return NULL;
313  }
314  ff_make_absolute_url(pls->url, sizeof(pls->url), base, url);
315  if (!pls->url[0]) {
316  av_packet_free(&pls->pkt);
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: */
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 {
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 
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];
470  char defaultr[4];
471  char forced[4];
473 };
474 
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"))
486  else if (!strcmp(info->type, "VIDEO"))
488  else if (!strcmp(info->type, "SUBTITLES"))
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) */
507  if (c->ctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL)
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)) {
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  av_dict_copy(&tmp, *opts, 0);
693  av_dict_copy(&tmp, opts2, 0);
694  ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
695  }
696  } else {
697  ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
698  }
699  if (ret >= 0) {
700  // update cookies on http response with setcookies.
701  char *new_cookies = NULL;
702 
703  if (!(s->flags & AVFMT_FLAG_CUSTOM_IO))
704  av_opt_get(*pb, "cookies", AV_OPT_SEARCH_CHILDREN, (uint8_t**)&new_cookies);
705 
706  if (new_cookies)
707  av_dict_set(opts, "cookies", new_cookies, AV_DICT_DONT_STRDUP_VAL);
708  }
709 
710  av_dict_free(&tmp);
711 
712  if (is_http_out)
713  *is_http_out = is_http;
714 
715  return ret;
716 }
717 
718 static int parse_playlist(HLSContext *c, const char *url,
719  struct playlist *pls, AVIOContext *in)
720 {
721  int ret = 0, is_segment = 0, is_variant = 0;
722  int64_t duration = 0;
723  enum KeyType key_type = KEY_NONE;
724  uint8_t iv[16] = "";
725  int has_iv = 0;
726  char key[MAX_URL_SIZE] = "";
727  char line[MAX_URL_SIZE];
728  const char *ptr;
729  int close_in = 0;
730  int64_t seg_offset = 0;
731  int64_t seg_size = -1;
732  uint8_t *new_url = NULL;
733  struct variant_info variant_info;
734  char tmp_str[MAX_URL_SIZE];
735  struct segment *cur_init_section = NULL;
736  int is_http = av_strstart(url, "http", NULL);
737  struct segment **prev_segments = NULL;
738  int prev_n_segments = 0;
739  int64_t prev_start_seq_no = -1;
740 
741  if (is_http && !in && c->http_persistent && c->playlist_pb) {
742  in = c->playlist_pb;
743  ret = open_url_keepalive(c->ctx, &c->playlist_pb, url, NULL);
744  if (ret == AVERROR_EXIT) {
745  return ret;
746  } else if (ret < 0) {
747  if (ret != AVERROR_EOF)
748  av_log(c->ctx, AV_LOG_WARNING,
749  "keepalive request failed for '%s' with error: '%s' when parsing playlist\n",
750  url, av_err2str(ret));
751  in = NULL;
752  }
753  }
754 
755  if (!in) {
757  av_dict_copy(&opts, c->avio_opts, 0);
758 
759  if (c->http_persistent)
760  av_dict_set(&opts, "multiple_requests", "1", 0);
761 
762  ret = c->ctx->io_open(c->ctx, &in, url, AVIO_FLAG_READ, &opts);
763  av_dict_free(&opts);
764  if (ret < 0)
765  return ret;
766 
767  if (is_http && c->http_persistent)
768  c->playlist_pb = in;
769  else
770  close_in = 1;
771  }
772 
773  if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >= 0)
774  url = new_url;
775 
776  ff_get_chomp_line(in, line, sizeof(line));
777  if (strcmp(line, "#EXTM3U")) {
779  goto fail;
780  }
781 
782  if (pls) {
783  prev_start_seq_no = pls->start_seq_no;
784  prev_segments = pls->segments;
785  prev_n_segments = pls->n_segments;
786  pls->segments = NULL;
787  pls->n_segments = 0;
788 
789  pls->finished = 0;
790  pls->type = PLS_TYPE_UNSPECIFIED;
791  }
792  while (!avio_feof(in)) {
793  ff_get_chomp_line(in, line, sizeof(line));
794  if (av_strstart(line, "#EXT-X-STREAM-INF:", &ptr)) {
795  is_variant = 1;
796  memset(&variant_info, 0, sizeof(variant_info));
798  &variant_info);
799  } else if (av_strstart(line, "#EXT-X-KEY:", &ptr)) {
800  struct key_info info = {{0}};
802  &info);
803  key_type = KEY_NONE;
804  has_iv = 0;
805  if (!strcmp(info.method, "AES-128"))
806  key_type = KEY_AES_128;
807  if (!strcmp(info.method, "SAMPLE-AES"))
808  key_type = KEY_SAMPLE_AES;
809  if (!av_strncasecmp(info.iv, "0x", 2)) {
810  ff_hex_to_data(iv, info.iv + 2);
811  has_iv = 1;
812  }
813  av_strlcpy(key, info.uri, sizeof(key));
814  } else if (av_strstart(line, "#EXT-X-MEDIA:", &ptr)) {
815  struct rendition_info info = {{0}};
817  &info);
818  new_rendition(c, &info, url);
819  } else if (av_strstart(line, "#EXT-X-TARGETDURATION:", &ptr)) {
820  int64_t t;
821  ret = ensure_playlist(c, &pls, url);
822  if (ret < 0)
823  goto fail;
824  t = strtoll(ptr, NULL, 10);
825  if (t < 0 || t >= INT64_MAX / AV_TIME_BASE) {
827  goto fail;
828  }
829  pls->target_duration = t * AV_TIME_BASE;
830  } else if (av_strstart(line, "#EXT-X-MEDIA-SEQUENCE:", &ptr)) {
831  uint64_t seq_no;
832  ret = ensure_playlist(c, &pls, url);
833  if (ret < 0)
834  goto fail;
835  seq_no = strtoull(ptr, NULL, 10);
836  if (seq_no > INT64_MAX) {
837  av_log(c->ctx, AV_LOG_DEBUG, "MEDIA-SEQUENCE higher than "
838  "INT64_MAX, mask out the highest bit\n");
839  seq_no &= INT64_MAX;
840  }
841  pls->start_seq_no = seq_no;
842  } else if (av_strstart(line, "#EXT-X-PLAYLIST-TYPE:", &ptr)) {
843  ret = ensure_playlist(c, &pls, url);
844  if (ret < 0)
845  goto fail;
846  if (!strcmp(ptr, "EVENT"))
847  pls->type = PLS_TYPE_EVENT;
848  else if (!strcmp(ptr, "VOD"))
849  pls->type = PLS_TYPE_VOD;
850  } else if (av_strstart(line, "#EXT-X-MAP:", &ptr)) {
851  struct init_section_info info = {{0}};
852  ret = ensure_playlist(c, &pls, url);
853  if (ret < 0)
854  goto fail;
856  &info);
857  cur_init_section = new_init_section(pls, &info, url);
858  if (!cur_init_section) {
859  ret = AVERROR(ENOMEM);
860  goto fail;
861  }
862  cur_init_section->key_type = key_type;
863  if (has_iv) {
864  memcpy(cur_init_section->iv, iv, sizeof(iv));
865  } else {
866  int64_t seq = pls->start_seq_no + pls->n_segments;
867  memset(cur_init_section->iv, 0, sizeof(cur_init_section->iv));
868  AV_WB64(cur_init_section->iv + 8, seq);
869  }
870 
871  if (key_type != KEY_NONE) {
872  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, key);
873  if (!tmp_str[0]) {
874  av_free(cur_init_section);
876  goto fail;
877  }
878  cur_init_section->key = av_strdup(tmp_str);
879  if (!cur_init_section->key) {
880  av_free(cur_init_section);
881  ret = AVERROR(ENOMEM);
882  goto fail;
883  }
884  } else {
885  cur_init_section->key = NULL;
886  }
887 
888  } else if (av_strstart(line, "#EXT-X-ENDLIST", &ptr)) {
889  if (pls)
890  pls->finished = 1;
891  } else if (av_strstart(line, "#EXTINF:", &ptr)) {
892  is_segment = 1;
893  duration = atof(ptr) * AV_TIME_BASE;
894  } else if (av_strstart(line, "#EXT-X-BYTERANGE:", &ptr)) {
895  seg_size = strtoll(ptr, NULL, 10);
896  ptr = strchr(ptr, '@');
897  if (ptr)
898  seg_offset = strtoll(ptr+1, NULL, 10);
899  } else if (av_strstart(line, "#", NULL)) {
900  av_log(c->ctx, AV_LOG_INFO, "Skip ('%s')\n", line);
901  continue;
902  } else if (line[0]) {
903  if (is_variant) {
904  if (!new_variant(c, &variant_info, line, url)) {
905  ret = AVERROR(ENOMEM);
906  goto fail;
907  }
908  is_variant = 0;
909  }
910  if (is_segment) {
911  struct segment *seg;
912  ret = ensure_playlist(c, &pls, url);
913  if (ret < 0)
914  goto fail;
915  seg = av_malloc(sizeof(struct segment));
916  if (!seg) {
917  ret = AVERROR(ENOMEM);
918  goto fail;
919  }
920  if (has_iv) {
921  memcpy(seg->iv, iv, sizeof(iv));
922  } else {
923  uint64_t seq = pls->start_seq_no + (uint64_t)pls->n_segments;
924  memset(seg->iv, 0, sizeof(seg->iv));
925  AV_WB64(seg->iv + 8, seq);
926  }
927 
928  if (key_type != KEY_NONE) {
929  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, key);
930  if (!tmp_str[0]) {
932  av_free(seg);
933  goto fail;
934  }
935  seg->key = av_strdup(tmp_str);
936  if (!seg->key) {
937  av_free(seg);
938  ret = AVERROR(ENOMEM);
939  goto fail;
940  }
941  } else {
942  seg->key = NULL;
943  }
944 
945  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, line);
946  if (!tmp_str[0]) {
948  if (seg->key)
949  av_free(seg->key);
950  av_free(seg);
951  goto fail;
952  }
953  seg->url = av_strdup(tmp_str);
954  if (!seg->url) {
955  av_free(seg->key);
956  av_free(seg);
957  ret = AVERROR(ENOMEM);
958  goto fail;
959  }
960 
961  if (duration < 0.001 * AV_TIME_BASE) {
962  av_log(c->ctx, AV_LOG_WARNING, "Cannot get correct #EXTINF value of segment %s,"
963  " set to default value to 1ms.\n", seg->url);
964  duration = 0.001 * AV_TIME_BASE;
965  }
966  seg->duration = duration;
967  seg->key_type = key_type;
968  dynarray_add(&pls->segments, &pls->n_segments, seg);
969  is_segment = 0;
970 
971  seg->size = seg_size;
972  if (seg_size >= 0) {
973  seg->url_offset = seg_offset;
974  seg_offset += seg_size;
975  seg_size = -1;
976  } else {
977  seg->url_offset = 0;
978  seg_offset = 0;
979  }
980 
981  seg->init_section = cur_init_section;
982  }
983  }
984  }
985  if (prev_segments) {
986  if (pls->start_seq_no > prev_start_seq_no && c->first_timestamp != AV_NOPTS_VALUE) {
987  int64_t prev_timestamp = c->first_timestamp;
988  int i;
989  int64_t diff = pls->start_seq_no - prev_start_seq_no;
990  for (i = 0; i < prev_n_segments && i < diff; i++) {
991  c->first_timestamp += prev_segments[i]->duration;
992  }
993  av_log(c->ctx, AV_LOG_DEBUG, "Media sequence change (%"PRId64" -> %"PRId64")"
994  " reflected in first_timestamp: %"PRId64" -> %"PRId64"\n",
995  prev_start_seq_no, pls->start_seq_no,
996  prev_timestamp, c->first_timestamp);
997  } else if (pls->start_seq_no < prev_start_seq_no) {
998  av_log(c->ctx, AV_LOG_WARNING, "Media sequence changed unexpectedly: %"PRId64" -> %"PRId64"\n",
999  prev_start_seq_no, pls->start_seq_no);
1000  }
1001  free_segment_dynarray(prev_segments, prev_n_segments);
1002  av_freep(&prev_segments);
1003  }
1004  if (pls)
1006 
1007 fail:
1008  av_free(new_url);
1009  if (close_in)
1010  ff_format_io_close(c->ctx, &in);
1011  c->ctx->ctx_flags = c->ctx->ctx_flags & ~(unsigned)AVFMTCTX_UNSEEKABLE;
1012  if (!c->n_variants || !c->variants[0]->n_playlists ||
1013  !(c->variants[0]->playlists[0]->finished ||
1014  c->variants[0]->playlists[0]->type == PLS_TYPE_EVENT))
1015  c->ctx->ctx_flags |= AVFMTCTX_UNSEEKABLE;
1016  return ret;
1017 }
1018 
1019 static struct segment *current_segment(struct playlist *pls)
1020 {
1021  int64_t n = pls->cur_seq_no - pls->start_seq_no;
1022  if (n >= pls->n_segments)
1023  return NULL;
1024  return pls->segments[n];
1025 }
1026 
1027 static struct segment *next_segment(struct playlist *pls)
1028 {
1029  int64_t n = pls->cur_seq_no - pls->start_seq_no + 1;
1030  if (n >= pls->n_segments)
1031  return NULL;
1032  return pls->segments[n];
1033 }
1034 
1035 static int read_from_url(struct playlist *pls, struct segment *seg,
1036  uint8_t *buf, int buf_size)
1037 {
1038  int ret;
1039 
1040  /* limit read if the segment was only a part of a file */
1041  if (seg->size >= 0)
1042  buf_size = FFMIN(buf_size, seg->size - pls->cur_seg_offset);
1043 
1044  ret = avio_read(pls->input, buf, buf_size);
1045  if (ret > 0)
1046  pls->cur_seg_offset += ret;
1047 
1048  return ret;
1049 }
1050 
1051 /* Parse the raw ID3 data and pass contents to caller */
1053  AVDictionary **metadata, int64_t *dts, HLSAudioSetupInfo *audio_setup_info,
1054  ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta **extra_meta)
1055 {
1056  static const char id3_priv_owner_ts[] = "com.apple.streaming.transportStreamTimestamp";
1057  static const char id3_priv_owner_audio_setup[] = "com.apple.streaming.audioDescription";
1058  ID3v2ExtraMeta *meta;
1059 
1060  ff_id3v2_read_dict(pb, metadata, ID3v2_DEFAULT_MAGIC, extra_meta);
1061  for (meta = *extra_meta; meta; meta = meta->next) {
1062  if (!strcmp(meta->tag, "PRIV")) {
1063  ID3v2ExtraMetaPRIV *priv = &meta->data.priv;
1064  if (priv->datasize == 8 && !av_strncasecmp(priv->owner, id3_priv_owner_ts, 44)) {
1065  /* 33-bit MPEG timestamp */
1066  int64_t ts = AV_RB64(priv->data);
1067  av_log(s, AV_LOG_DEBUG, "HLS ID3 audio timestamp %"PRId64"\n", ts);
1068  if ((ts & ~((1ULL << 33) - 1)) == 0)
1069  *dts = ts;
1070  else
1071  av_log(s, AV_LOG_ERROR, "Invalid HLS ID3 audio timestamp %"PRId64"\n", ts);
1072  } else if (priv->datasize >= 8 && !av_strncasecmp(priv->owner, id3_priv_owner_audio_setup, 36)) {
1073  ff_hls_senc_read_audio_setup_info(audio_setup_info, priv->data, priv->datasize);
1074  }
1075  } else if (!strcmp(meta->tag, "APIC") && apic)
1076  *apic = &meta->data.apic;
1077  }
1078 }
1079 
1080 /* Check if the ID3 metadata contents have changed */
1081 static int id3_has_changed_values(struct playlist *pls, AVDictionary *metadata,
1082  ID3v2ExtraMetaAPIC *apic)
1083 {
1084  AVDictionaryEntry *entry = NULL;
1085  AVDictionaryEntry *oldentry;
1086  /* check that no keys have changed values */
1087  while ((entry = av_dict_get(metadata, "", entry, AV_DICT_IGNORE_SUFFIX))) {
1088  oldentry = av_dict_get(pls->id3_initial, entry->key, NULL, AV_DICT_MATCH_CASE);
1089  if (!oldentry || strcmp(oldentry->value, entry->value) != 0)
1090  return 1;
1091  }
1092 
1093  /* check if apic appeared */
1094  if (apic && (pls->ctx->nb_streams != 2 || !pls->ctx->streams[1]->attached_pic.data))
1095  return 1;
1096 
1097  if (apic) {
1098  int size = pls->ctx->streams[1]->attached_pic.size;
1099  if (size != apic->buf->size - AV_INPUT_BUFFER_PADDING_SIZE)
1100  return 1;
1101 
1102  if (memcmp(apic->buf->data, pls->ctx->streams[1]->attached_pic.data, size) != 0)
1103  return 1;
1104  }
1105 
1106  return 0;
1107 }
1108 
1109 /* Parse ID3 data and handle the found data */
1110 static void handle_id3(AVIOContext *pb, struct playlist *pls)
1111 {
1112  AVDictionary *metadata = NULL;
1113  ID3v2ExtraMetaAPIC *apic = NULL;
1114  ID3v2ExtraMeta *extra_meta = NULL;
1115  int64_t timestamp = AV_NOPTS_VALUE;
1116 
1117  parse_id3(pls->ctx, pb, &metadata, &timestamp, &pls->audio_setup_info, &apic, &extra_meta);
1118 
1119  if (timestamp != AV_NOPTS_VALUE) {
1120  pls->id3_mpegts_timestamp = timestamp;
1121  pls->id3_offset = 0;
1122  }
1123 
1124  if (!pls->id3_found) {
1125  /* initial ID3 tags */
1127  pls->id3_found = 1;
1128 
1129  /* get picture attachment and set text metadata */
1130  if (pls->ctx->nb_streams)
1131  ff_id3v2_parse_apic(pls->ctx, extra_meta);
1132  else
1133  /* demuxer not yet opened, defer picture attachment */
1134  pls->id3_deferred_extra = extra_meta;
1135 
1136  ff_id3v2_parse_priv_dict(&metadata, extra_meta);
1137  av_dict_copy(&pls->ctx->metadata, metadata, 0);
1138  pls->id3_initial = metadata;
1139 
1140  } else {
1141  if (!pls->id3_changed && id3_has_changed_values(pls, metadata, apic)) {
1142  avpriv_report_missing_feature(pls->parent, "Changing ID3 metadata in HLS audio elementary stream");
1143  pls->id3_changed = 1;
1144  }
1145  av_dict_free(&metadata);
1146  }
1147 
1148  if (!pls->id3_deferred_extra)
1149  ff_id3v2_free_extra_meta(&extra_meta);
1150 }
1151 
1152 static void intercept_id3(struct playlist *pls, uint8_t *buf,
1153  int buf_size, int *len)
1154 {
1155  /* intercept id3 tags, we do not want to pass them to the raw
1156  * demuxer on all segment switches */
1157  int bytes;
1158  int id3_buf_pos = 0;
1159  int fill_buf = 0;
1160  struct segment *seg = current_segment(pls);
1161 
1162  /* gather all the id3 tags */
1163  while (1) {
1164  /* see if we can retrieve enough data for ID3 header */
1165  if (*len < ID3v2_HEADER_SIZE && buf_size >= ID3v2_HEADER_SIZE) {
1166  bytes = read_from_url(pls, seg, buf + *len, ID3v2_HEADER_SIZE - *len);
1167  if (bytes > 0) {
1168 
1169  if (bytes == ID3v2_HEADER_SIZE - *len)
1170  /* no EOF yet, so fill the caller buffer again after
1171  * we have stripped the ID3 tags */
1172  fill_buf = 1;
1173 
1174  *len += bytes;
1175 
1176  } else if (*len <= 0) {
1177  /* error/EOF */
1178  *len = bytes;
1179  fill_buf = 0;
1180  }
1181  }
1182 
1183  if (*len < ID3v2_HEADER_SIZE)
1184  break;
1185 
1186  if (ff_id3v2_match(buf, ID3v2_DEFAULT_MAGIC)) {
1187  int64_t maxsize = seg->size >= 0 ? seg->size : 1024*1024;
1188  int taglen = ff_id3v2_tag_len(buf);
1189  int tag_got_bytes = FFMIN(taglen, *len);
1190  int remaining = taglen - tag_got_bytes;
1191 
1192  if (taglen > maxsize) {
1193  av_log(pls->parent, AV_LOG_ERROR, "Too large HLS ID3 tag (%d > %"PRId64" bytes)\n",
1194  taglen, maxsize);
1195  break;
1196  }
1197 
1198  /*
1199  * Copy the id3 tag to our temporary id3 buffer.
1200  * We could read a small id3 tag directly without memcpy, but
1201  * we would still need to copy the large tags, and handling
1202  * both of those cases together with the possibility for multiple
1203  * tags would make the handling a bit complex.
1204  */
1205  pls->id3_buf = av_fast_realloc(pls->id3_buf, &pls->id3_buf_size, id3_buf_pos + taglen);
1206  if (!pls->id3_buf)
1207  break;
1208  memcpy(pls->id3_buf + id3_buf_pos, buf, tag_got_bytes);
1209  id3_buf_pos += tag_got_bytes;
1210 
1211  /* strip the intercepted bytes */
1212  *len -= tag_got_bytes;
1213  memmove(buf, buf + tag_got_bytes, *len);
1214  av_log(pls->parent, AV_LOG_DEBUG, "Stripped %d HLS ID3 bytes\n", tag_got_bytes);
1215 
1216  if (remaining > 0) {
1217  /* read the rest of the tag in */
1218  if (read_from_url(pls, seg, pls->id3_buf + id3_buf_pos, remaining) != remaining)
1219  break;
1220  id3_buf_pos += remaining;
1221  av_log(pls->parent, AV_LOG_DEBUG, "Stripped additional %d HLS ID3 bytes\n", remaining);
1222  }
1223 
1224  } else {
1225  /* no more ID3 tags */
1226  break;
1227  }
1228  }
1229 
1230  /* re-fill buffer for the caller unless EOF */
1231  if (*len >= 0 && (fill_buf || *len == 0)) {
1232  bytes = read_from_url(pls, seg, buf + *len, buf_size - *len);
1233 
1234  /* ignore error if we already had some data */
1235  if (bytes >= 0)
1236  *len += bytes;
1237  else if (*len == 0)
1238  *len = bytes;
1239  }
1240 
1241  if (pls->id3_buf) {
1242  /* Now parse all the ID3 tags */
1243  FFIOContext id3ioctx;
1244  ffio_init_context(&id3ioctx, pls->id3_buf, id3_buf_pos, 0, NULL, NULL, NULL, NULL);
1245  handle_id3(&id3ioctx.pub, pls);
1246  }
1247 
1248  if (pls->is_id3_timestamped == -1)
1250 }
1251 
1252 static int open_input(HLSContext *c, struct playlist *pls, struct segment *seg, AVIOContext **in)
1253 {
1254  AVDictionary *opts = NULL;
1255  int ret;
1256  int is_http = 0;
1257 
1258  if (c->http_persistent)
1259  av_dict_set(&opts, "multiple_requests", "1", 0);
1260 
1261  if (seg->size >= 0) {
1262  /* try to restrict the HTTP request to the part we want
1263  * (if this is in fact a HTTP request) */
1264  av_dict_set_int(&opts, "offset", seg->url_offset, 0);
1265  av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
1266  }
1267 
1268  av_log(pls->parent, AV_LOG_VERBOSE, "HLS request for url '%s', offset %"PRId64", playlist %d\n",
1269  seg->url, seg->url_offset, pls->index);
1270 
1271  if (seg->key_type == KEY_AES_128 || seg->key_type == KEY_SAMPLE_AES) {
1272  if (strcmp(seg->key, pls->key_url)) {
1273  AVIOContext *pb = NULL;
1274  if (open_url(pls->parent, &pb, seg->key, &c->avio_opts, opts, NULL) == 0) {
1275  ret = avio_read(pb, pls->key, sizeof(pls->key));
1276  if (ret != sizeof(pls->key)) {
1277  av_log(pls->parent, AV_LOG_ERROR, "Unable to read key file %s\n",
1278  seg->key);
1279  }
1280  ff_format_io_close(pls->parent, &pb);
1281  } else {
1282  av_log(pls->parent, AV_LOG_ERROR, "Unable to open key file %s\n",
1283  seg->key);
1284  }
1285  av_strlcpy(pls->key_url, seg->key, sizeof(pls->key_url));
1286  }
1287  }
1288 
1289  if (seg->key_type == KEY_AES_128) {
1290  char iv[33], key[33], url[MAX_URL_SIZE];
1291  ff_data_to_hex(iv, seg->iv, sizeof(seg->iv), 0);
1292  ff_data_to_hex(key, pls->key, sizeof(pls->key), 0);
1293  if (strstr(seg->url, "://"))
1294  snprintf(url, sizeof(url), "crypto+%s", seg->url);
1295  else
1296  snprintf(url, sizeof(url), "crypto:%s", seg->url);
1297 
1298  av_dict_set(&opts, "key", key, 0);
1299  av_dict_set(&opts, "iv", iv, 0);
1300 
1301  ret = open_url(pls->parent, in, url, &c->avio_opts, opts, &is_http);
1302  if (ret < 0) {
1303  goto cleanup;
1304  }
1305  ret = 0;
1306  } else {
1307  ret = open_url(pls->parent, in, seg->url, &c->avio_opts, opts, &is_http);
1308  }
1309 
1310  /* Seek to the requested position. If this was a HTTP request, the offset
1311  * should already be where want it to, but this allows e.g. local testing
1312  * without a HTTP server.
1313  *
1314  * This is not done for HTTP at all as avio_seek() does internal bookkeeping
1315  * of file offset which is out-of-sync with the actual offset when "offset"
1316  * AVOption is used with http protocol, causing the seek to not be a no-op
1317  * as would be expected. Wrong offset received from the server will not be
1318  * noticed without the call, though.
1319  */
1320  if (ret == 0 && !is_http && seg->url_offset) {
1321  int64_t seekret = avio_seek(*in, seg->url_offset, SEEK_SET);
1322  if (seekret < 0) {
1323  av_log(pls->parent, AV_LOG_ERROR, "Unable to seek to offset %"PRId64" of HLS segment '%s'\n", seg->url_offset, seg->url);
1324  ret = seekret;
1325  ff_format_io_close(pls->parent, in);
1326  }
1327  }
1328 
1329 cleanup:
1330  av_dict_free(&opts);
1331  pls->cur_seg_offset = 0;
1332  return ret;
1333 }
1334 
1335 static int update_init_section(struct playlist *pls, struct segment *seg)
1336 {
1337  static const int max_init_section_size = 1024*1024;
1338  HLSContext *c = pls->parent->priv_data;
1339  int64_t sec_size;
1340  int64_t urlsize;
1341  int ret;
1342 
1343  if (seg->init_section == pls->cur_init_section)
1344  return 0;
1345 
1346  pls->cur_init_section = NULL;
1347 
1348  if (!seg->init_section)
1349  return 0;
1350 
1351  ret = open_input(c, pls, seg->init_section, &pls->input);
1352  if (ret < 0) {
1354  "Failed to open an initialization section in playlist %d\n",
1355  pls->index);
1356  return ret;
1357  }
1358 
1359  if (seg->init_section->size >= 0)
1360  sec_size = seg->init_section->size;
1361  else if ((urlsize = avio_size(pls->input)) >= 0)
1362  sec_size = urlsize;
1363  else
1364  sec_size = max_init_section_size;
1365 
1366  av_log(pls->parent, AV_LOG_DEBUG,
1367  "Downloading an initialization section of size %"PRId64"\n",
1368  sec_size);
1369 
1370  sec_size = FFMIN(sec_size, max_init_section_size);
1371 
1372  av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size);
1373 
1374  ret = read_from_url(pls, seg->init_section, pls->init_sec_buf,
1375  pls->init_sec_buf_size);
1376  ff_format_io_close(pls->parent, &pls->input);
1377 
1378  if (ret < 0)
1379  return ret;
1380 
1381  pls->cur_init_section = seg->init_section;
1382  pls->init_sec_data_len = ret;
1383  pls->init_sec_buf_read_offset = 0;
1384 
1385  /* spec says audio elementary streams do not have media initialization
1386  * sections, so there should be no ID3 timestamps */
1387  pls->is_id3_timestamped = 0;
1388 
1389  return 0;
1390 }
1391 
1392 static int64_t default_reload_interval(struct playlist *pls)
1393 {
1394  return pls->n_segments > 0 ?
1395  pls->segments[pls->n_segments - 1]->duration :
1396  pls->target_duration;
1397 }
1398 
1399 static int playlist_needed(struct playlist *pls)
1400 {
1401  AVFormatContext *s = pls->parent;
1402  int i, j;
1403  int stream_needed = 0;
1404  int first_st;
1405 
1406  /* If there is no context or streams yet, the playlist is needed */
1407  if (!pls->ctx || !pls->n_main_streams)
1408  return 1;
1409 
1410  /* check if any of the streams in the playlist are needed */
1411  for (i = 0; i < pls->n_main_streams; i++) {
1412  if (pls->main_streams[i]->discard < AVDISCARD_ALL) {
1413  stream_needed = 1;
1414  break;
1415  }
1416  }
1417 
1418  /* If all streams in the playlist were discarded, the playlist is not
1419  * needed (regardless of whether whole programs are discarded or not). */
1420  if (!stream_needed)
1421  return 0;
1422 
1423  /* Otherwise, check if all the programs (variants) this playlist is in are
1424  * discarded. Since all streams in the playlist are part of the same programs
1425  * we can just check the programs of the first stream. */
1426 
1427  first_st = pls->main_streams[0]->index;
1428 
1429  for (i = 0; i < s->nb_programs; i++) {
1430  AVProgram *program = s->programs[i];
1431  if (program->discard < AVDISCARD_ALL) {
1432  for (j = 0; j < program->nb_stream_indexes; j++) {
1433  if (program->stream_index[j] == first_st) {
1434  /* playlist is in an undiscarded program */
1435  return 1;
1436  }
1437  }
1438  }
1439  }
1440 
1441  /* some streams were not discarded but all the programs were */
1442  return 0;
1443 }
1444 
1445 static int read_data(void *opaque, uint8_t *buf, int buf_size)
1446 {
1447  struct playlist *v = opaque;
1448  HLSContext *c = v->parent->priv_data;
1449  int ret;
1450  int just_opened = 0;
1451  int reload_count = 0;
1452  struct segment *seg;
1453 
1454 restart:
1455  if (!v->needed)
1456  return AVERROR_EOF;
1457 
1458  if (!v->input || (c->http_persistent && v->input_read_done)) {
1459  int64_t reload_interval;
1460 
1461  /* Check that the playlist is still needed before opening a new
1462  * segment. */
1463  v->needed = playlist_needed(v);
1464 
1465  if (!v->needed) {
1466  av_log(v->parent, AV_LOG_INFO, "No longer receiving playlist %d ('%s')\n",
1467  v->index, v->url);
1468  return AVERROR_EOF;
1469  }
1470 
1471  /* If this is a live stream and the reload interval has elapsed since
1472  * the last playlist reload, reload the playlists now. */
1473  reload_interval = default_reload_interval(v);
1474 
1475 reload:
1476  reload_count++;
1477  if (reload_count > c->max_reload)
1478  return AVERROR_EOF;
1479  if (!v->finished &&
1480  av_gettime_relative() - v->last_load_time >= reload_interval) {
1481  if ((ret = parse_playlist(c, v->url, v, NULL)) < 0) {
1482  if (ret != AVERROR_EXIT)
1483  av_log(v->parent, AV_LOG_WARNING, "Failed to reload playlist %d\n",
1484  v->index);
1485  return ret;
1486  }
1487  /* If we need to reload the playlist again below (if
1488  * there's still no more segments), switch to a reload
1489  * interval of half the target duration. */
1490  reload_interval = v->target_duration / 2;
1491  }
1492  if (v->cur_seq_no < v->start_seq_no) {
1494  "skipping %"PRId64" segments ahead, expired from playlists\n",
1495  v->start_seq_no - v->cur_seq_no);
1496  v->cur_seq_no = v->start_seq_no;
1497  }
1498  if (v->cur_seq_no > v->last_seq_no) {
1499  v->last_seq_no = v->cur_seq_no;
1500  v->m3u8_hold_counters = 0;
1501  } else if (v->last_seq_no == v->cur_seq_no) {
1502  v->m3u8_hold_counters++;
1503  if (v->m3u8_hold_counters >= c->m3u8_hold_counters) {
1504  return AVERROR_EOF;
1505  }
1506  } else {
1507  av_log(v->parent, AV_LOG_WARNING, "maybe the m3u8 list sequence have been wraped.\n");
1508  }
1509  if (v->cur_seq_no >= v->start_seq_no + v->n_segments) {
1510  if (v->finished)
1511  return AVERROR_EOF;
1512  while (av_gettime_relative() - v->last_load_time < reload_interval) {
1513  if (ff_check_interrupt(c->interrupt_callback))
1514  return AVERROR_EXIT;
1515  av_usleep(100*1000);
1516  }
1517  /* Enough time has elapsed since the last reload */
1518  goto reload;
1519  }
1520 
1521  v->input_read_done = 0;
1522  seg = current_segment(v);
1523 
1524  /* load/update Media Initialization Section, if any */
1525  ret = update_init_section(v, seg);
1526  if (ret)
1527  return ret;
1528 
1529  if (c->http_multiple == 1 && v->input_next_requested) {
1530  FFSWAP(AVIOContext *, v->input, v->input_next);
1531  v->cur_seg_offset = 0;
1532  v->input_next_requested = 0;
1533  ret = 0;
1534  } else {
1535  ret = open_input(c, v, seg, &v->input);
1536  }
1537  if (ret < 0) {
1538  if (ff_check_interrupt(c->interrupt_callback))
1539  return AVERROR_EXIT;
1540  av_log(v->parent, AV_LOG_WARNING, "Failed to open segment %"PRId64" of playlist %d\n",
1541  v->cur_seq_no,
1542  v->index);
1543  v->cur_seq_no += 1;
1544  goto reload;
1545  }
1546  just_opened = 1;
1547  }
1548 
1549  if (c->http_multiple == -1) {
1550  uint8_t *http_version_opt = NULL;
1551  int r = av_opt_get(v->input, "http_version", AV_OPT_SEARCH_CHILDREN, &http_version_opt);
1552  if (r >= 0) {
1553  c->http_multiple = (!strncmp((const char *)http_version_opt, "1.1", 3) || !strncmp((const char *)http_version_opt, "2.0", 3));
1554  av_freep(&http_version_opt);
1555  }
1556  }
1557 
1558  seg = next_segment(v);
1559  if (c->http_multiple == 1 && !v->input_next_requested &&
1560  seg && seg->key_type == KEY_NONE && av_strstart(seg->url, "http", NULL)) {
1561  ret = open_input(c, v, seg, &v->input_next);
1562  if (ret < 0) {
1563  if (ff_check_interrupt(c->interrupt_callback))
1564  return AVERROR_EXIT;
1565  av_log(v->parent, AV_LOG_WARNING, "Failed to open segment %"PRId64" of playlist %d\n",
1566  v->cur_seq_no + 1,
1567  v->index);
1568  } else {
1569  v->input_next_requested = 1;
1570  }
1571  }
1572 
1574  /* Push init section out first before first actual segment */
1575  int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size);
1576  memcpy(buf, v->init_sec_buf, copy_size);
1577  v->init_sec_buf_read_offset += copy_size;
1578  return copy_size;
1579  }
1580 
1581  seg = current_segment(v);
1582  ret = read_from_url(v, seg, buf, buf_size);
1583  if (ret > 0) {
1584  if (just_opened && v->is_id3_timestamped != 0) {
1585  /* Intercept ID3 tags here, elementary audio streams are required
1586  * to convey timestamps using them in the beginning of each segment. */
1587  intercept_id3(v, buf, buf_size, &ret);
1588  }
1589 
1590  return ret;
1591  }
1592  if (c->http_persistent &&
1593  seg->key_type == KEY_NONE && av_strstart(seg->url, "http", NULL)) {
1594  v->input_read_done = 1;
1595  } else {
1596  ff_format_io_close(v->parent, &v->input);
1597  }
1598  v->cur_seq_no++;
1599 
1600  c->cur_seq_no = v->cur_seq_no;
1601 
1602  goto restart;
1603 }
1604 
1605 static void add_renditions_to_variant(HLSContext *c, struct variant *var,
1606  enum AVMediaType type, const char *group_id)
1607 {
1608  int i;
1609 
1610  for (i = 0; i < c->n_renditions; i++) {
1611  struct rendition *rend = c->renditions[i];
1612 
1613  if (rend->type == type && !strcmp(rend->group_id, group_id)) {
1614 
1615  if (rend->playlist)
1616  /* rendition is an external playlist
1617  * => add the playlist to the variant */
1618  dynarray_add(&var->playlists, &var->n_playlists, rend->playlist);
1619  else
1620  /* rendition is part of the variant main Media Playlist
1621  * => add the rendition to the main Media Playlist */
1622  dynarray_add(&var->playlists[0]->renditions,
1623  &var->playlists[0]->n_renditions,
1624  rend);
1625  }
1626  }
1627 }
1628 
1630  enum AVMediaType type)
1631 {
1632  int rend_idx = 0;
1633  int i;
1634 
1635  for (i = 0; i < pls->n_main_streams; i++) {
1636  AVStream *st = pls->main_streams[i];
1637 
1638  if (st->codecpar->codec_type != type)
1639  continue;
1640 
1641  for (; rend_idx < pls->n_renditions; rend_idx++) {
1642  struct rendition *rend = pls->renditions[rend_idx];
1643 
1644  if (rend->type != type)
1645  continue;
1646 
1647  if (rend->language[0])
1648  av_dict_set(&st->metadata, "language", rend->language, 0);
1649  if (rend->name[0])
1650  av_dict_set(&st->metadata, "comment", rend->name, 0);
1651 
1652  st->disposition |= rend->disposition;
1653  }
1654  if (rend_idx >=pls->n_renditions)
1655  break;
1656  }
1657 }
1658 
1659 /* if timestamp was in valid range: returns 1 and sets seq_no
1660  * if not: returns 0 and sets seq_no to closest segment */
1662  int64_t timestamp, int64_t *seq_no)
1663 {
1664  int i;
1665  int64_t pos = c->first_timestamp == AV_NOPTS_VALUE ?
1666  0 : c->first_timestamp;
1667 
1668  if (timestamp < pos) {
1669  *seq_no = pls->start_seq_no;
1670  return 0;
1671  }
1672 
1673  for (i = 0; i < pls->n_segments; i++) {
1674  int64_t diff = pos + pls->segments[i]->duration - timestamp;
1675  if (diff > 0) {
1676  *seq_no = pls->start_seq_no + i;
1677  return 1;
1678  }
1679  pos += pls->segments[i]->duration;
1680  }
1681 
1682  *seq_no = pls->start_seq_no + pls->n_segments - 1;
1683 
1684  return 0;
1685 }
1686 
1687 static int64_t select_cur_seq_no(HLSContext *c, struct playlist *pls)
1688 {
1689  int64_t seq_no;
1690 
1691  if (!pls->finished && !c->first_packet &&
1693  /* reload the playlist since it was suspended */
1694  parse_playlist(c, pls->url, pls, NULL);
1695 
1696  /* If playback is already in progress (we are just selecting a new
1697  * playlist) and this is a complete file, find the matching segment
1698  * by counting durations. */
1699  if (pls->finished && c->cur_timestamp != AV_NOPTS_VALUE) {
1700  find_timestamp_in_playlist(c, pls, c->cur_timestamp, &seq_no);
1701  return seq_no;
1702  }
1703 
1704  if (!pls->finished) {
1705  if (!c->first_packet && /* we are doing a segment selection during playback */
1706  c->cur_seq_no >= pls->start_seq_no &&
1707  c->cur_seq_no < pls->start_seq_no + pls->n_segments)
1708  /* While spec 3.4.3 says that we cannot assume anything about the
1709  * content at the same sequence number on different playlists,
1710  * in practice this seems to work and doing it otherwise would
1711  * require us to download a segment to inspect its timestamps. */
1712  return c->cur_seq_no;
1713 
1714  /* If this is a live stream, start live_start_index segments from the
1715  * start or end */
1716  if (c->live_start_index < 0)
1717  return pls->start_seq_no + FFMAX(pls->n_segments + c->live_start_index, 0);
1718  else
1719  return pls->start_seq_no + FFMIN(c->live_start_index, pls->n_segments - 1);
1720  }
1721 
1722  /* Otherwise just start on the first segment. */
1723  return pls->start_seq_no;
1724 }
1725 
1726 static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url,
1727  int flags, AVDictionary **opts)
1728 {
1730  "A HLS playlist item '%s' referred to an external file '%s'. "
1731  "Opening this file was forbidden for security reasons\n",
1732  s->url, url);
1733  return AVERROR(EPERM);
1734 }
1735 
1736 static void add_stream_to_programs(AVFormatContext *s, struct playlist *pls, AVStream *stream)
1737 {
1738  HLSContext *c = s->priv_data;
1739  int i, j;
1740  int bandwidth = -1;
1741 
1742  for (i = 0; i < c->n_variants; i++) {
1743  struct variant *v = c->variants[i];
1744 
1745  for (j = 0; j < v->n_playlists; j++) {
1746  if (v->playlists[j] != pls)
1747  continue;
1748 
1749  av_program_add_stream_index(s, i, stream->index);
1750 
1751  if (bandwidth < 0)
1752  bandwidth = v->bandwidth;
1753  else if (bandwidth != v->bandwidth)
1754  bandwidth = -1; /* stream in multiple variants with different bandwidths */
1755  }
1756  }
1757 
1758  if (bandwidth >= 0)
1759  av_dict_set_int(&stream->metadata, "variant_bitrate", bandwidth, 0);
1760 }
1761 
1763 {
1764  int err;
1765 
1766  err = avcodec_parameters_copy(st->codecpar, ist->codecpar);
1767  if (err < 0)
1768  return err;
1769 
1770  if (pls->is_id3_timestamped) /* custom timestamps via id3 */
1771  avpriv_set_pts_info(st, 33, 1, MPEG_TIME_BASE);
1772  else
1773  avpriv_set_pts_info(st, ist->pts_wrap_bits, ist->time_base.num, ist->time_base.den);
1774 
1775  // copy disposition
1776  st->disposition = ist->disposition;
1777 
1778  // copy side data
1779  for (int i = 0; i < ist->nb_side_data; i++) {
1780  const AVPacketSideData *sd_src = &ist->side_data[i];
1781  uint8_t *dst_data;
1782 
1783  dst_data = av_stream_new_side_data(st, sd_src->type, sd_src->size);
1784  if (!dst_data)
1785  return AVERROR(ENOMEM);
1786  memcpy(dst_data, sd_src->data, sd_src->size);
1787  }
1788 
1789  ffstream(st)->need_context_update = 1;
1790 
1791  return 0;
1792 }
1793 
1794 /* add new subdemuxer streams to our context, if any */
1796 {
1797  int err;
1798 
1799  while (pls->n_main_streams < pls->ctx->nb_streams) {
1800  int ist_idx = pls->n_main_streams;
1802  AVStream *ist = pls->ctx->streams[ist_idx];
1803 
1804  if (!st)
1805  return AVERROR(ENOMEM);
1806 
1807  st->id = pls->index;
1808  dynarray_add(&pls->main_streams, &pls->n_main_streams, st);
1809 
1810  add_stream_to_programs(s, pls, st);
1811 
1812  err = set_stream_info_from_input_stream(st, pls, ist);
1813  if (err < 0)
1814  return err;
1815  }
1816 
1817  return 0;
1818 }
1819 
1821 {
1822  HLSContext *c = s->priv_data;
1823  int flag_needed = 0;
1824  int i;
1825 
1826  for (i = 0; i < c->n_playlists; i++) {
1827  struct playlist *pls = c->playlists[i];
1828 
1829  if (pls->has_noheader_flag) {
1830  flag_needed = 1;
1831  break;
1832  }
1833  }
1834 
1835  if (flag_needed)
1836  s->ctx_flags |= AVFMTCTX_NOHEADER;
1837  else
1838  s->ctx_flags &= ~AVFMTCTX_NOHEADER;
1839 }
1840 
1842 {
1843  HLSContext *c = s->priv_data;
1844 
1848 
1849  if (c->crypto_ctx.aes_ctx)
1850  av_free(c->crypto_ctx.aes_ctx);
1851 
1852  av_dict_free(&c->avio_opts);
1853  ff_format_io_close(c->ctx, &c->playlist_pb);
1854 
1855  return 0;
1856 }
1857 
1859 {
1860  HLSContext *c = s->priv_data;
1861  int ret = 0, i;
1862  int64_t highest_cur_seq_no = 0;
1863 
1864  c->ctx = s;
1865  c->interrupt_callback = &s->interrupt_callback;
1866 
1867  c->first_packet = 1;
1868  c->first_timestamp = AV_NOPTS_VALUE;
1869  c->cur_timestamp = AV_NOPTS_VALUE;
1870 
1871  if ((ret = ffio_copy_url_options(s->pb, &c->avio_opts)) < 0)
1872  return ret;
1873 
1874  /* XXX: Some HLS servers don't like being sent the range header,
1875  in this case, need to setting http_seekable = 0 to disable
1876  the range header */
1877  av_dict_set_int(&c->avio_opts, "seekable", c->http_seekable, 0);
1878 
1879  if ((ret = parse_playlist(c, s->url, NULL, s->pb)) < 0)
1880  return ret;
1881 
1882  if (c->n_variants == 0) {
1883  av_log(s, AV_LOG_WARNING, "Empty playlist\n");
1884  return AVERROR_EOF;
1885  }
1886  /* If the playlist only contained playlists (Master Playlist),
1887  * parse each individual playlist. */
1888  if (c->n_playlists > 1 || c->playlists[0]->n_segments == 0) {
1889  for (i = 0; i < c->n_playlists; i++) {
1890  struct playlist *pls = c->playlists[i];
1891  pls->m3u8_hold_counters = 0;
1892  if ((ret = parse_playlist(c, pls->url, pls, NULL)) < 0) {
1893  av_log(s, AV_LOG_WARNING, "parse_playlist error %s [%s]\n", av_err2str(ret), pls->url);
1894  pls->broken = 1;
1895  if (c->n_playlists > 1)
1896  continue;
1897  return ret;
1898  }
1899  }
1900  }
1901 
1902  for (i = 0; i < c->n_variants; i++) {
1903  if (c->variants[i]->playlists[0]->n_segments == 0) {
1904  av_log(s, AV_LOG_WARNING, "Empty segment [%s]\n", c->variants[i]->playlists[0]->url);
1905  c->variants[i]->playlists[0]->broken = 1;
1906  }
1907  }
1908 
1909  /* If this isn't a live stream, calculate the total duration of the
1910  * stream. */
1911  if (c->variants[0]->playlists[0]->finished) {
1912  int64_t duration = 0;
1913  for (i = 0; i < c->variants[0]->playlists[0]->n_segments; i++)
1914  duration += c->variants[0]->playlists[0]->segments[i]->duration;
1915  s->duration = duration;
1916  }
1917 
1918  /* Associate renditions with variants */
1919  for (i = 0; i < c->n_variants; i++) {
1920  struct variant *var = c->variants[i];
1921 
1922  if (var->audio_group[0])
1924  if (var->video_group[0])
1926  if (var->subtitles_group[0])
1928  }
1929 
1930  /* Create a program for each variant */
1931  for (i = 0; i < c->n_variants; i++) {
1932  struct variant *v = c->variants[i];
1933  AVProgram *program;
1934 
1935  program = av_new_program(s, i);
1936  if (!program)
1937  return AVERROR(ENOMEM);
1938  av_dict_set_int(&program->metadata, "variant_bitrate", v->bandwidth, 0);
1939  }
1940 
1941  /* Select the starting segments */
1942  for (i = 0; i < c->n_playlists; i++) {
1943  struct playlist *pls = c->playlists[i];
1944 
1945  if (pls->n_segments == 0)
1946  continue;
1947 
1948  pls->cur_seq_no = select_cur_seq_no(c, pls);
1949  highest_cur_seq_no = FFMAX(highest_cur_seq_no, pls->cur_seq_no);
1950  }
1951 
1952  /* Open the demuxer for each playlist */
1953  for (i = 0; i < c->n_playlists; i++) {
1954  struct playlist *pls = c->playlists[i];
1955  const AVInputFormat *in_fmt = NULL;
1956  char *url;
1958  struct segment *seg = NULL;
1959 
1960  if (!(pls->ctx = avformat_alloc_context()))
1961  return AVERROR(ENOMEM);
1962 
1963  if (pls->n_segments == 0)
1964  continue;
1965 
1966  pls->index = i;
1967  pls->needed = 1;
1968  pls->parent = s;
1969 
1970  /*
1971  * If this is a live stream and this playlist looks like it is one segment
1972  * behind, try to sync it up so that every substream starts at the same
1973  * time position (so e.g. avformat_find_stream_info() will see packets from
1974  * all active streams within the first few seconds). This is not very generic,
1975  * though, as the sequence numbers are technically independent.
1976  */
1977  if (!pls->finished && pls->cur_seq_no == highest_cur_seq_no - 1 &&
1978  highest_cur_seq_no < pls->start_seq_no + pls->n_segments) {
1979  pls->cur_seq_no = highest_cur_seq_no;
1980  }
1981 
1983  if (!pls->read_buffer){
1984  avformat_free_context(pls->ctx);
1985  pls->ctx = NULL;
1986  return AVERROR(ENOMEM);
1987  }
1988 
1989  ffio_init_context(&pls->pb, pls->read_buffer, INITIAL_BUFFER_SIZE, 0, pls,
1990  read_data, NULL, NULL);
1991 
1992  /*
1993  * If encryption scheme is SAMPLE-AES, try to read ID3 tags of
1994  * external audio track that contains audio setup information
1995  */
1996  seg = current_segment(pls);
1997  if (seg && seg->key_type == KEY_SAMPLE_AES && pls->n_renditions > 0 &&
1998  pls->renditions[0]->type == AVMEDIA_TYPE_AUDIO) {
1999  uint8_t buf[HLS_MAX_ID3_TAGS_DATA_LEN];
2000  if ((ret = avio_read(&pls->pb.pub, buf, HLS_MAX_ID3_TAGS_DATA_LEN)) < 0) {
2001  /* Fail if error was not end of file */
2002  if (ret != AVERROR_EOF) {
2003  avformat_free_context(pls->ctx);
2004  pls->ctx = NULL;
2005  return ret;
2006  }
2007  }
2008  ret = 0;
2009  /* Reset reading */
2010  ff_format_io_close(pls->parent, &pls->input);
2011  pls->input = NULL;
2012  pls->input_read_done = 0;
2013  ff_format_io_close(pls->parent, &pls->input_next);
2014  pls->input_next = NULL;
2015  pls->input_next_requested = 0;
2016  pls->cur_seg_offset = 0;
2017  pls->cur_init_section = NULL;
2018  /* Reset EOF flag */
2019  pls->pb.pub.eof_reached = 0;
2020  /* Clear any buffered data */
2021  pls->pb.pub.buf_end = pls->pb.pub.buf_ptr = pls->pb.pub.buffer;
2022  /* Reset the position */
2023  pls->pb.pub.pos = 0;
2024  }
2025 
2026  /*
2027  * If encryption scheme is SAMPLE-AES and audio setup information is present in external audio track,
2028  * use that information to find the media format, otherwise probe input data
2029  */
2030  if (seg && seg->key_type == KEY_SAMPLE_AES && pls->is_id3_timestamped &&
2032  void *iter = NULL;
2033  while ((in_fmt = (const AVInputFormat *)av_demuxer_iterate(&iter)))
2034  if (in_fmt->raw_codec_id == pls->audio_setup_info.codec_id)
2035  break;
2036  } else {
2037  pls->ctx->probesize = s->probesize > 0 ? s->probesize : 1024 * 4;
2038  pls->ctx->max_analyze_duration = s->max_analyze_duration > 0 ? s->max_analyze_duration : 4 * AV_TIME_BASE;
2039  pls->ctx->interrupt_callback = s->interrupt_callback;
2040  url = av_strdup(pls->segments[0]->url);
2041  ret = av_probe_input_buffer(&pls->pb.pub, &in_fmt, url, NULL, 0, 0);
2042  if (ret < 0) {
2043  /* Free the ctx - it isn't initialized properly at this point,
2044  * so avformat_close_input shouldn't be called. If
2045  * avformat_open_input fails below, it frees and zeros the
2046  * context, so it doesn't need any special treatment like this. */
2047  av_log(s, AV_LOG_ERROR, "Error when loading first segment '%s'\n", url);
2048  avformat_free_context(pls->ctx);
2049  pls->ctx = NULL;
2050  av_free(url);
2051  return ret;
2052  }
2053  av_free(url);
2054  }
2055 
2056  if (seg && seg->key_type == KEY_SAMPLE_AES) {
2057  if (strstr(in_fmt->name, "mov")) {
2058  char key[33];
2059  ff_data_to_hex(key, pls->key, sizeof(pls->key), 0);
2060  av_dict_set(&options, "decryption_key", key, AV_OPT_FLAG_DECODING_PARAM);
2061  } else if (!c->crypto_ctx.aes_ctx) {
2062  c->crypto_ctx.aes_ctx = av_aes_alloc();
2063  if (!c->crypto_ctx.aes_ctx) {
2064  avformat_free_context(pls->ctx);
2065  pls->ctx = NULL;
2066  return AVERROR(ENOMEM);
2067  }
2068  }
2069  }
2070 
2071  pls->ctx->pb = &pls->pb.pub;
2072  pls->ctx->io_open = nested_io_open;
2073  pls->ctx->flags |= s->flags & ~AVFMT_FLAG_CUSTOM_IO;
2074 
2075  if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
2076  return ret;
2077 
2078  av_dict_copy(&options, c->seg_format_opts, 0);
2079 
2080  ret = avformat_open_input(&pls->ctx, pls->segments[0]->url, in_fmt, &options);
2082  if (ret < 0)
2083  return ret;
2084 
2085  if (pls->id3_deferred_extra && pls->ctx->nb_streams == 1) {
2090  }
2091 
2092  if (pls->is_id3_timestamped == -1)
2093  av_log(s, AV_LOG_WARNING, "No expected HTTP requests have been made\n");
2094 
2095  /*
2096  * For ID3 timestamped raw audio streams we need to detect the packet
2097  * durations to calculate timestamps in fill_timing_for_id3_timestamped_stream(),
2098  * but for other streams we can rely on our user calling avformat_find_stream_info()
2099  * on us if they want to.
2100  */
2101  if (pls->is_id3_timestamped || (pls->n_renditions > 0 && pls->renditions[0]->type == AVMEDIA_TYPE_AUDIO)) {
2102  if (seg && seg->key_type == KEY_SAMPLE_AES && pls->audio_setup_info.setup_data_length > 0 &&
2103  pls->ctx->nb_streams == 1)
2105  else
2107 
2108  if (ret < 0)
2109  return ret;
2110  }
2111 
2112  pls->has_noheader_flag = !!(pls->ctx->ctx_flags & AVFMTCTX_NOHEADER);
2113 
2114  /* Create new AVStreams for each stream in this playlist */
2116  if (ret < 0)
2117  return ret;
2118 
2119  /*
2120  * Copy any metadata from playlist to main streams, but do not set
2121  * event flags.
2122  */
2123  if (pls->n_main_streams)
2124  av_dict_copy(&pls->main_streams[0]->metadata, pls->ctx->metadata, 0);
2125 
2129  }
2130 
2132 
2133  return 0;
2134 }
2135 
2137 {
2138  HLSContext *c = s->priv_data;
2139  int i, changed = 0;
2140  int cur_needed;
2141 
2142  /* Check if any new streams are needed */
2143  for (i = 0; i < c->n_playlists; i++) {
2144  struct playlist *pls = c->playlists[i];
2145 
2146  cur_needed = playlist_needed(c->playlists[i]);
2147 
2148  if (pls->broken) {
2149  continue;
2150  }
2151  if (cur_needed && !pls->needed) {
2152  pls->needed = 1;
2153  changed = 1;
2154  pls->cur_seq_no = select_cur_seq_no(c, pls);
2155  pls->pb.pub.eof_reached = 0;
2156  if (c->cur_timestamp != AV_NOPTS_VALUE) {
2157  /* catch up */
2158  pls->seek_timestamp = c->cur_timestamp;
2159  pls->seek_flags = AVSEEK_FLAG_ANY;
2160  pls->seek_stream_index = -1;
2161  }
2162  av_log(s, AV_LOG_INFO, "Now receiving playlist %d, segment %"PRId64"\n", i, pls->cur_seq_no);
2163  } else if (first && !cur_needed && pls->needed) {
2164  ff_format_io_close(pls->parent, &pls->input);
2165  pls->input_read_done = 0;
2166  ff_format_io_close(pls->parent, &pls->input_next);
2167  pls->input_next_requested = 0;
2168  pls->needed = 0;
2169  changed = 1;
2170  av_log(s, AV_LOG_INFO, "No longer receiving playlist %d\n", i);
2171  }
2172  }
2173  return changed;
2174 }
2175 
2177 {
2178  if (pls->id3_offset >= 0) {
2179  pls->pkt->dts = pls->id3_mpegts_timestamp +
2180  av_rescale_q(pls->id3_offset,
2181  pls->ctx->streams[pls->pkt->stream_index]->time_base,
2183  if (pls->pkt->duration)
2184  pls->id3_offset += pls->pkt->duration;
2185  else
2186  pls->id3_offset = -1;
2187  } else {
2188  /* there have been packets with unknown duration
2189  * since the last id3 tag, should not normally happen */
2190  pls->pkt->dts = AV_NOPTS_VALUE;
2191  }
2192 
2193  if (pls->pkt->duration)
2194  pls->pkt->duration = av_rescale_q(pls->pkt->duration,
2195  pls->ctx->streams[pls->pkt->stream_index]->time_base,
2197 
2198  pls->pkt->pts = AV_NOPTS_VALUE;
2199 }
2200 
2201 static AVRational get_timebase(struct playlist *pls)
2202 {
2203  if (pls->is_id3_timestamped)
2204  return MPEG_TIME_BASE_Q;
2205 
2206  return pls->ctx->streams[pls->pkt->stream_index]->time_base;
2207 }
2208 
2209 static int compare_ts_with_wrapdetect(int64_t ts_a, struct playlist *pls_a,
2210  int64_t ts_b, struct playlist *pls_b)
2211 {
2212  int64_t scaled_ts_a = av_rescale_q(ts_a, get_timebase(pls_a), MPEG_TIME_BASE_Q);
2213  int64_t scaled_ts_b = av_rescale_q(ts_b, get_timebase(pls_b), MPEG_TIME_BASE_Q);
2214 
2215  return av_compare_mod(scaled_ts_a, scaled_ts_b, 1LL << 33);
2216 }
2217 
2219 {
2220  HLSContext *c = s->priv_data;
2221  int ret, i, minplaylist = -1;
2222 
2223  recheck_discard_flags(s, c->first_packet);
2224  c->first_packet = 0;
2225 
2226  for (i = 0; i < c->n_playlists; i++) {
2227  struct playlist *pls = c->playlists[i];
2228  /* Make sure we've got one buffered packet from each open playlist
2229  * stream */
2230  if (pls->needed && !pls->pkt->data) {
2231  while (1) {
2232  int64_t ts_diff;
2233  AVRational tb;
2234  struct segment *seg = NULL;
2235  ret = av_read_frame(pls->ctx, pls->pkt);
2236  if (ret < 0) {
2237  if (!avio_feof(&pls->pb.pub) && ret != AVERROR_EOF)
2238  return ret;
2239  break;
2240  } else {
2241  /* stream_index check prevents matching picture attachments etc. */
2242  if (pls->is_id3_timestamped && pls->pkt->stream_index == 0) {
2243  /* audio elementary streams are id3 timestamped */
2245  }
2246 
2247  if (c->first_timestamp == AV_NOPTS_VALUE &&
2248  pls->pkt->dts != AV_NOPTS_VALUE)
2249  c->first_timestamp = av_rescale_q(pls->pkt->dts,
2251  }
2252 
2253  seg = current_segment(pls);
2254  if (seg && seg->key_type == KEY_SAMPLE_AES && !strstr(pls->ctx->iformat->name, "mov")) {
2256  memcpy(c->crypto_ctx.iv, seg->iv, sizeof(seg->iv));
2257  memcpy(c->crypto_ctx.key, pls->key, sizeof(pls->key));
2258  ff_hls_senc_decrypt_frame(codec_id, &c->crypto_ctx, pls->pkt);
2259  }
2260 
2261  if (pls->seek_timestamp == AV_NOPTS_VALUE)
2262  break;
2263 
2264  if (pls->seek_stream_index < 0 ||
2265  pls->seek_stream_index == pls->pkt->stream_index) {
2266 
2267  if (pls->pkt->dts == AV_NOPTS_VALUE) {
2269  break;
2270  }
2271 
2272  tb = get_timebase(pls);
2273  ts_diff = av_rescale_rnd(pls->pkt->dts, AV_TIME_BASE,
2274  tb.den, AV_ROUND_DOWN) -
2275  pls->seek_timestamp;
2276  if (ts_diff >= 0 && (pls->seek_flags & AVSEEK_FLAG_ANY ||
2277  pls->pkt->flags & AV_PKT_FLAG_KEY)) {
2279  break;
2280  }
2281  }
2282  av_packet_unref(pls->pkt);
2283  }
2284  }
2285  /* Check if this stream has the packet with the lowest dts */
2286  if (pls->pkt->data) {
2287  struct playlist *minpls = minplaylist < 0 ?
2288  NULL : c->playlists[minplaylist];
2289  if (minplaylist < 0) {
2290  minplaylist = i;
2291  } else {
2292  int64_t dts = pls->pkt->dts;
2293  int64_t mindts = minpls->pkt->dts;
2294 
2295  if (dts == AV_NOPTS_VALUE ||
2296  (mindts != AV_NOPTS_VALUE && compare_ts_with_wrapdetect(dts, pls, mindts, minpls) < 0))
2297  minplaylist = i;
2298  }
2299  }
2300  }
2301 
2302  /* If we got a packet, return it */
2303  if (minplaylist >= 0) {
2304  struct playlist *pls = c->playlists[minplaylist];
2305  AVStream *ist;
2306  AVStream *st;
2307 
2309  if (ret < 0) {
2310  av_packet_unref(pls->pkt);
2311  return ret;
2312  }
2313 
2314  // If sub-demuxer reports updated metadata, copy it to the first stream
2315  // and set its AVSTREAM_EVENT_FLAG_METADATA_UPDATED flag.
2317  if (pls->n_main_streams) {
2318  st = pls->main_streams[0];
2319  av_dict_copy(&st->metadata, pls->ctx->metadata, 0);
2321  }
2323  }
2324 
2325  /* check if noheader flag has been cleared by the subdemuxer */
2326  if (pls->has_noheader_flag && !(pls->ctx->ctx_flags & AVFMTCTX_NOHEADER)) {
2327  pls->has_noheader_flag = 0;
2329  }
2330 
2331  if (pls->pkt->stream_index >= pls->n_main_streams) {
2332  av_log(s, AV_LOG_ERROR, "stream index inconsistency: index %d, %d main streams, %d subdemuxer streams\n",
2333  pls->pkt->stream_index, pls->n_main_streams, pls->ctx->nb_streams);
2334  av_packet_unref(pls->pkt);
2335  return AVERROR_BUG;
2336  }
2337 
2338  ist = pls->ctx->streams[pls->pkt->stream_index];
2339  st = pls->main_streams[pls->pkt->stream_index];
2340 
2341  av_packet_move_ref(pkt, pls->pkt);
2342  pkt->stream_index = st->index;
2343 
2344  if (pkt->dts != AV_NOPTS_VALUE)
2345  c->cur_timestamp = av_rescale_q(pkt->dts,
2346  ist->time_base,
2347  AV_TIME_BASE_Q);
2348 
2349  /* There may be more situations where this would be useful, but this at least
2350  * handles newly probed codecs properly (i.e. request_probe by mpegts). */
2351  if (ist->codecpar->codec_id != st->codecpar->codec_id) {
2353  if (ret < 0) {
2354  return ret;
2355  }
2356  }
2357 
2358  return 0;
2359  }
2360  return AVERROR_EOF;
2361 }
2362 
2363 static int hls_read_seek(AVFormatContext *s, int stream_index,
2364  int64_t timestamp, int flags)
2365 {
2366  HLSContext *c = s->priv_data;
2367  struct playlist *seek_pls = NULL;
2368  int i, j;
2369  int stream_subdemuxer_index;
2370  int64_t first_timestamp, seek_timestamp, duration;
2371  int64_t seq_no;
2372 
2373  if ((flags & AVSEEK_FLAG_BYTE) || (c->ctx->ctx_flags & AVFMTCTX_UNSEEKABLE))
2374  return AVERROR(ENOSYS);
2375 
2376  first_timestamp = c->first_timestamp == AV_NOPTS_VALUE ?
2377  0 : c->first_timestamp;
2378 
2380  s->streams[stream_index]->time_base.den,
2383 
2384  duration = s->duration == AV_NOPTS_VALUE ?
2385  0 : s->duration;
2386 
2387  if (0 < duration && duration < seek_timestamp - first_timestamp)
2388  return AVERROR(EIO);
2389 
2390  /* find the playlist with the specified stream */
2391  for (i = 0; i < c->n_playlists; i++) {
2392  struct playlist *pls = c->playlists[i];
2393  for (j = 0; j < pls->n_main_streams; j++) {
2394  if (pls->main_streams[j] == s->streams[stream_index]) {
2395  seek_pls = pls;
2396  stream_subdemuxer_index = j;
2397  break;
2398  }
2399  }
2400  }
2401  /* check if the timestamp is valid for the playlist with the
2402  * specified stream index */
2403  if (!seek_pls || !find_timestamp_in_playlist(c, seek_pls, seek_timestamp, &seq_no))
2404  return AVERROR(EIO);
2405 
2406  /* set segment now so we do not need to search again below */
2407  seek_pls->cur_seq_no = seq_no;
2408  seek_pls->seek_stream_index = stream_subdemuxer_index;
2409 
2410  for (i = 0; i < c->n_playlists; i++) {
2411  /* Reset reading */
2412  struct playlist *pls = c->playlists[i];
2413  AVIOContext *const pb = &pls->pb.pub;
2414  ff_format_io_close(pls->parent, &pls->input);
2415  pls->input_read_done = 0;
2416  ff_format_io_close(pls->parent, &pls->input_next);
2417  pls->input_next_requested = 0;
2418  av_packet_unref(pls->pkt);
2419  pb->eof_reached = 0;
2420  /* Clear any buffered data */
2421  pb->buf_end = pb->buf_ptr = pb->buffer;
2422  /* Reset the pos, to let the mpegts demuxer know we've seeked. */
2423  pb->pos = 0;
2424  /* Flush the packet queue of the subdemuxer. */
2425  ff_read_frame_flush(pls->ctx);
2426 
2428  pls->seek_flags = flags;
2429 
2430  if (pls != seek_pls) {
2431  /* set closest segment seq_no for playlists not handled above */
2433  /* seek the playlist to the given position without taking
2434  * keyframes into account since this playlist does not have the
2435  * specified stream where we should look for the keyframes */
2436  pls->seek_stream_index = -1;
2437  pls->seek_flags |= AVSEEK_FLAG_ANY;
2438  }
2439  }
2440 
2441  c->cur_timestamp = seek_timestamp;
2442 
2443  return 0;
2444 }
2445 
2446 static int hls_probe(const AVProbeData *p)
2447 {
2448  /* Require #EXTM3U at the start, and either one of the ones below
2449  * somewhere for a proper match. */
2450  if (strncmp(p->buf, "#EXTM3U", 7))
2451  return 0;
2452 
2453  if (strstr(p->buf, "#EXT-X-STREAM-INF:") ||
2454  strstr(p->buf, "#EXT-X-TARGETDURATION:") ||
2455  strstr(p->buf, "#EXT-X-MEDIA-SEQUENCE:"))
2456  return AVPROBE_SCORE_MAX;
2457  return 0;
2458 }
2459 
2460 #define OFFSET(x) offsetof(HLSContext, x)
2461 #define FLAGS AV_OPT_FLAG_DECODING_PARAM
2462 static const AVOption hls_options[] = {
2463  {"live_start_index", "segment index to start live streams at (negative values are from the end)",
2464  OFFSET(live_start_index), AV_OPT_TYPE_INT, {.i64 = -3}, INT_MIN, INT_MAX, FLAGS},
2465  {"allowed_extensions", "List of file extensions that hls is allowed to access",
2466  OFFSET(allowed_extensions), AV_OPT_TYPE_STRING,
2467  {.str = "3gp,aac,avi,ac3,eac3,flac,mkv,m3u8,m4a,m4s,m4v,mpg,mov,mp2,mp3,mp4,mpeg,mpegts,ogg,ogv,oga,ts,vob,wav"},
2468  INT_MIN, INT_MAX, FLAGS},
2469  {"max_reload", "Maximum number of times a insufficient list is attempted to be reloaded",
2470  OFFSET(max_reload), AV_OPT_TYPE_INT, {.i64 = 1000}, 0, INT_MAX, FLAGS},
2471  {"m3u8_hold_counters", "The maximum number of times to load m3u8 when it refreshes without new segments",
2472  OFFSET(m3u8_hold_counters), AV_OPT_TYPE_INT, {.i64 = 1000}, 0, INT_MAX, FLAGS},
2473  {"http_persistent", "Use persistent HTTP connections",
2474  OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS },
2475  {"http_multiple", "Use multiple HTTP connections for fetching segments",
2476  OFFSET(http_multiple), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, FLAGS},
2477  {"http_seekable", "Use HTTP partial requests, 0 = disable, 1 = enable, -1 = auto",
2478  OFFSET(http_seekable), AV_OPT_TYPE_BOOL, { .i64 = -1}, -1, 1, FLAGS},
2479  {"seg_format_options", "Set options for segment demuxer",
2480  OFFSET(seg_format_opts), AV_OPT_TYPE_DICT, {.str = NULL}, 0, 0, FLAGS},
2481  {NULL}
2482 };
2483 
2484 static const AVClass hls_class = {
2485  .class_name = "hls demuxer",
2486  .item_name = av_default_item_name,
2487  .option = hls_options,
2488  .version = LIBAVUTIL_VERSION_INT,
2489 };
2490 
2492  .name = "hls",
2493  .long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
2494  .priv_class = &hls_class,
2495  .priv_data_size = sizeof(HLSContext),
2497  .flags_internal = FF_FMT_INIT_CLEANUP,
2498  .read_probe = hls_probe,
2501  .read_close = hls_close,
2503 };
MPEG_TIME_BASE_Q
#define MPEG_TIME_BASE_Q
Definition: hls.c:51
ff_get_chomp_line
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:815
av_packet_unref
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:424
playlist::start_seq_no
int64_t start_seq_no
Definition: hls.c:118
AVMEDIA_TYPE_SUBTITLE
@ AVMEDIA_TYPE_SUBTITLE
Definition: avutil.h:204
av_gettime_relative
int64_t av_gettime_relative(void)
Get the current time in microseconds since some unspecified starting point.
Definition: time.c:56
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:186
MAX_CHARACTERISTICS_LEN
#define MAX_CHARACTERISTICS_LEN
Definition: hls.c:48
program
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C program
Definition: undefined.txt:6
ffio_copy_url_options
int ffio_copy_url_options(AVIOContext *pb, AVDictionary **avio_opts)
Read url related dictionary options from the AVIOContext and write to the given dictionary.
Definition: aviobuf.c:1023
FF_FMT_INIT_CLEANUP
#define FF_FMT_INIT_CLEANUP
For an AVInputFormat with this flag set read_close() needs to be called by the caller upon read_heade...
Definition: internal.h:49
playlist::input
AVIOContext * input
Definition: hls.c:100
playlist::seek_stream_index
int seek_stream_index
Definition: hls.c:155
free_segment_dynarray
static void free_segment_dynarray(struct segment **segments, int n_segments)
Definition: hls.c:225
r
const char * r
Definition: vf_curves.c:116
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
opt.h
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:768
playlist::target_duration
int64_t target_duration
Definition: hls.c:117
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
playlist::n_renditions
int n_renditions
Definition: hls.c:161
HLSContext::avio_opts
AVDictionary * avio_opts
Definition: hls.c:214
HLSContext::n_variants
int n_variants
Definition: hls.c:200
ID3v2ExtraMeta::next
struct ID3v2ExtraMeta * next
Definition: id3v2.h:86
AVInputFormat::raw_codec_id
int raw_codec_id
Raw demuxers store their codec ID here.
Definition: avformat.h:699
FF_COMPLIANCE_EXPERIMENTAL
#define FF_COMPLIANCE_EXPERIMENTAL
Allow nonstandardized experimental things.
Definition: avcodec.h:1285
HLSContext::http_seekable
int http_seekable
Definition: hls.c:220
playlist
Definition: hls.c:96
KEY_AES_128
@ KEY_AES_128
Definition: hls.c:67
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:57
AVBufferRef::data
uint8_t * data
The data buffer.
Definition: buffer.h:90
playlist::input_next_requested
int input_next_requested
Definition: hls.c:103
AVStream::discard
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:997
segment::url_offset
int64_t url_offset
Definition: hls.c:73
variant_info::subtitles
char subtitles[MAX_FIELD_LEN]
Definition: hls.c:334
playlist::id3_mpegts_timestamp
int64_t id3_mpegts_timestamp
Definition: hls.c:142
new_init_section
static struct segment * new_init_section(struct playlist *pls, struct init_section_info *info, const char *url_base)
Definition: hls.c:407
AV_TIME_BASE_Q
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
PLS_TYPE_VOD
@ PLS_TYPE_VOD
Definition: hls.c:88
playlist::input_next
AVIOContext * input_next
Definition: hls.c:102
playlist::id3_offset
int64_t id3_offset
Definition: hls.c:143
AV_DISPOSITION_DEFAULT
#define AV_DISPOSITION_DEFAULT
The stream should be chosen by default among other streams of the same type, unless the user has expl...
Definition: avformat.h:820
id3v2.h
playlist::seek_timestamp
int64_t seek_timestamp
Definition: hls.c:153
tmp
static uint8_t tmp[11]
Definition: aes_ctr.c:26
rendition_info::assoc_language
char assoc_language[MAX_FIELD_LEN]
Definition: hls.c:468
cleanup
static av_cold void cleanup(FlashSV2Context *s)
Definition: flashsv2enc.c:128
AVFormatContext::streams
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1268
AVPacketSideData
Definition: packet.h:314
AVPacket::data
uint8_t * data
Definition: packet.h:373
segment::size
int64_t size
Definition: hls.c:74
variant::subtitles_group
char subtitles_group[MAX_FIELD_LEN]
Definition: hls.c:194
AVOption
AVOption.
Definition: opt.h:247
ist
ifilter ist
Definition: ffmpeg_filter.c:177
compare_ts_with_wrapdetect
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:2209
AVFMT_FLAG_CUSTOM_IO
#define AVFMT_FLAG_CUSTOM_IO
The caller has supplied a custom AVIOContext, don't avio_close() it.
Definition: avformat.h:1326
playlist::finished
int finished
Definition: hls.c:115
AVSEEK_FLAG_BYTE
#define AVSEEK_FLAG_BYTE
seeking based on position in bytes
Definition: avformat.h:2276
AV_DICT_IGNORE_SUFFIX
#define AV_DICT_IGNORE_SUFFIX
Return first entry in a dictionary whose first part corresponds to the search key,...
Definition: dict.h:68
playlist::segments
struct segment ** segments
Definition: hls.c:120
rendition_info::type
char type[16]
Definition: hls.c:464
nested_io_open
static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **opts)
Definition: hls.c:1726
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:196
base
uint8_t base
Definition: vp3data.h:141
HLSAudioSetupInfo::setup_data_length
uint8_t setup_data_length
Definition: hls_sample_encryption.h:53
AVPacket::duration
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:391
mathematics.h
AVDictionary
Definition: dict.c:30
segment::key
char * key
Definition: hls.c:76
FFMAX
#define FFMAX(a, b)
Definition: macros.h:47
AVFormatContext::probesize
int64_t probesize
Maximum number of bytes read from input in order to determine stream properties.
Definition: avformat.h:1355
av_read_frame
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: demux.c:1412
rendition::type
enum AVMediaType type
Definition: hls.c:177
rendition_info::uri
char uri[MAX_URL_SIZE]
Definition: hls.c:465
OFFSET
#define OFFSET(x)
Definition: hls.c:2460
avio_size
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:352
FFIOContext
Definition: avio_internal.h:29
AV_PKT_FLAG_KEY
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:428
playlist::key_url
char key_url[MAX_URL_SIZE]
Definition: hls.c:136
av_packet_free
void av_packet_free(AVPacket **pkt)
Free the packet, if the packet is reference counted, it will be unreferenced first.
Definition: avpacket.c:75
AV_WB64
#define AV_WB64(p, v)
Definition: intreadwrite.h:433
HLSContext::first_packet
int first_packet
Definition: hls.c:210
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:31
AVIOInterruptCB
Callback for checking whether to abort blocking functions.
Definition: avio.h:58
avformat_queue_attached_pictures
int avformat_queue_attached_pictures(AVFormatContext *s)
Definition: utils.c:227
hls_close
static int hls_close(AVFormatContext *s)
Definition: hls.c:1841
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:459
avformat_close_input
void avformat_close_input(AVFormatContext **s)
Close an opened input AVFormatContext.
Definition: demux.c:355
AVPacketSideData::size
size_t size
Definition: packet.h:316
AVFormatContext::interrupt_callback
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1467
HLSContext::http_multiple
int http_multiple
Definition: hls.c:219
key_info::iv
char iv[35]
Definition: hls.c:384
variant::audio_group
char audio_group[MAX_FIELD_LEN]
Definition: hls.c:192
ffstream
static av_always_inline FFStream * ffstream(AVStream *st)
Definition: internal.h:432
recheck_discard_flags
static int recheck_discard_flags(AVFormatContext *s, int first)
Definition: hls.c:2136
hls_class
static const AVClass hls_class
Definition: hls.c:2484
segment::duration
int64_t duration
Definition: hls.c:72
fail
#define fail()
Definition: checkasm.h:127
AVSEEK_FLAG_ANY
#define AVSEEK_FLAG_ANY
seek to any frame, even non-keyframes
Definition: avformat.h:2277
new_variant
static struct variant * new_variant(HLSContext *c, struct variant_info *info, const char *url, const char *base)
Definition: hls.c:337
read_seek
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:149
playlist::input_read_done
int input_read_done
Definition: hls.c:101
HLSContext::n_renditions
int n_renditions
Definition: hls.c:204
read_close
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:141
AVIOContext::pos
int64_t pos
position in the file of the current buffer
Definition: avio.h:238
ff_hls_senc_read_audio_setup_info
void ff_hls_senc_read_audio_setup_info(HLSAudioSetupInfo *info, const uint8_t *buf, size_t size)
Definition: hls_sample_encryption.c:58
variant
Definition: hls.c:185
AV_DISPOSITION_FORCED
#define AV_DISPOSITION_FORCED
Track should be used during playback by default.
Definition: avformat.h:853
type
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf type
Definition: writing_filters.txt:86
dynarray_add
#define dynarray_add(tab, nb_ptr, elem)
Definition: internal.h:445
AV_ROUND_UP
@ AV_ROUND_UP
Round toward +infinity.
Definition: mathematics.h:83
av_new_program
AVProgram * av_new_program(AVFormatContext *s, int id)
Definition: utils.c:852
ff_check_interrupt
int ff_check_interrupt(AVIOInterruptCB *cb)
Check if the user has requested to interrupt a blocking function associated with cb.
Definition: avio.c:658
ID3v2ExtraMeta::apic
ID3v2ExtraMetaAPIC apic
Definition: id3v2.h:88
HLS_MAX_ID3_TAGS_DATA_LEN
#define HLS_MAX_ID3_TAGS_DATA_LEN
Definition: hls_sample_encryption.h:39
ff_data_to_hex
char * ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase)
Write hexadecimal string corresponding to given binary data.
Definition: utils.c:1147
handle_rendition_args
static void handle_rendition_args(struct rendition_info *info, const char *key, int key_len, char **dest, int *dest_len)
Definition: hls.c:559
AVFormatContext::event_flags
int event_flags
Flags indicating events happening on the file, a combination of AVFMT_EVENT_FLAG_*.
Definition: avformat.h:1510
AVStream::attached_pic
AVPacket attached_pic
For streams with AV_DISPOSITION_ATTACHED_PIC disposition, this packet will contain the attached pictu...
Definition: avformat.h:1024
playlist::cur_seq_no
int64_t cur_seq_no
Definition: hls.c:123
AV_DICT_DONT_STRDUP_VAL
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that's been allocated with av_malloc() or another memory allocation functio...
Definition: dict.h:72
playlist::type
enum PlaylistType type
Definition: hls.c:116
open_url
static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url, AVDictionary **opts, AVDictionary *opts2, int *is_http_out)
Definition: hls.c:631
first
trying all byte sequences megabyte in length and selecting the best looking sequence will yield cases to try But first
Definition: rate_distortion.txt:12
avassert.h
pkt
AVPacket * pkt
Definition: movenc.c:59
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
playlist::n_init_sections
int n_init_sections
Definition: hls.c:166
AVFormatContext::metadata
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1429
AVInputFormat
Definition: avformat.h:650
MPEG_TIME_BASE
#define MPEG_TIME_BASE
Definition: hls.c:50
ID3v2ExtraMeta
Definition: id3v2.h:84
AVFormatContext::ctx_flags
int ctx_flags
Flags signalling stream properties.
Definition: avformat.h:1249
duration
int64_t duration
Definition: movenc.c:64
free_rendition_list
static void free_rendition_list(HLSContext *c)
Definition: hls.c:294
avformat_open_input
int avformat_open_input(AVFormatContext **ps, const char *url, const AVInputFormat *fmt, AVDictionary **options)
Open an input stream and read the header.
Definition: demux.c:207
hls_options
static const AVOption hls_options[]
Definition: hls.c:2462
av_dict_get
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
variant_info
Definition: hls.c:329
fill_timing_for_id3_timestamped_stream
static void fill_timing_for_id3_timestamped_stream(struct playlist *pls)
Definition: hls.c:2176
av_fast_realloc
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:504
playlist_needed
static int playlist_needed(struct playlist *pls)
Definition: hls.c:1399
intreadwrite.h
key_info::uri
char uri[MAX_URL_SIZE]
Definition: hls.c:382
s
#define s(width, name)
Definition: cbs_vp9.c:257
segment::key_type
enum KeyType key_type
Definition: hls.c:77
KEY_SAMPLE_AES
@ KEY_SAMPLE_AES
Definition: hls.c:68
playlist::n_main_streams
int n_main_streams
Definition: hls.c:113
AVFormatContext::flags
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1318
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:655
AVFormatContext::iformat
const struct AVInputFormat * iformat
The input container format.
Definition: avformat.h:1212
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:449
AVDictionaryEntry::key
char * key
Definition: dict.h:80
playlist::init_sec_buf_read_offset
unsigned int init_sec_buf_read_offset
Definition: hls.c:134
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
HLSContext::cur_timestamp
int64_t cur_timestamp
Definition: hls.c:212
info
MIPS optimizations info
Definition: mips.txt:2
variant_info::video
char video[MAX_FIELD_LEN]
Definition: hls.c:333
av_strtok
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:186
av_match_ext
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
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:201
AVPacketSideData::data
uint8_t * data
Definition: packet.h:315
KEY_NONE
@ KEY_NONE
Definition: hls.c:66
HLSContext::n_playlists
int n_playlists
Definition: hls.c:202
variant_info::audio
char audio[MAX_FIELD_LEN]
Definition: hls.c:332
av_rescale_q
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:141
playlist::init_sections
struct segment ** init_sections
Definition: hls.c:167
ID3v2ExtraMetaAPIC::buf
AVBufferRef * buf
Definition: id3v2.h:66
playlist::init_sec_buf
uint8_t * init_sec_buf
Definition: hls.c:131
add_renditions_to_variant
static void add_renditions_to_variant(HLSContext *c, struct variant *var, enum AVMediaType type, const char *group_id)
Definition: hls.c:1605
HLSContext::allowed_extensions
char * allowed_extensions
Definition: hls.c:216
playlist::id3_buf
uint8_t * id3_buf
Definition: hls.c:144
codec_id
enum AVCodecID codec_id
Definition: vaapi_decode.c:369
FLAGS
#define FLAGS
Definition: hls.c:2461
playlist::read_buffer
uint8_t * read_buffer
Definition: hls.c:99
key
const char * key
Definition: hwcontext_opencl.c:168
HLSContext::crypto_ctx
HLSCryptoContext crypto_ctx
Definition: hls.c:222
av_usleep
int av_usleep(unsigned usec)
Sleep for a period of time.
Definition: time.c:84
playlist::id3_buf_size
unsigned int id3_buf_size
Definition: hls.c:145
HLSContext::seg_format_opts
AVDictionary * seg_format_opts
Definition: hls.c:215
hls_read_header
static int hls_read_header(AVFormatContext *s)
Definition: hls.c:1858
init_section_info
Definition: hls.c:402
ff_hex_to_data
int ff_hex_to_data(uint8_t *data, const char *p)
Parse a string of hexadecimal strings.
Definition: utils.c:1168
AVFormatContext::max_analyze_duration
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:1363
handle_id3
static void handle_id3(AVIOContext *pb, struct playlist *pls)
Definition: hls.c:1110
free_variant_list
static void free_variant_list(HLSContext *c)
Definition: hls.c:282
ID3v2ExtraMeta::tag
const char * tag
Definition: id3v2.h:85
rendition::group_id
char group_id[MAX_FIELD_LEN]
Definition: hls.c:179
AVDISCARD_ALL
@ AVDISCARD_ALL
discard all
Definition: defs.h:54
AVFormatContext
Format I/O context.
Definition: avformat.h:1200
internal.h
HLSContext::interrupt_callback
AVIOInterruptCB * interrupt_callback
Definition: hls.c:213
opts
AVDictionary * opts
Definition: movenc.c:50
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1095
variant::url
char url[MAX_URL_SIZE]
Definition: hlsproto.c:54
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
AVSEEK_FLAG_BACKWARD
#define AVSEEK_FLAG_BACKWARD
Definition: avformat.h:2275
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:527
current_segment
static struct segment * current_segment(struct playlist *pls)
Definition: hls.c:1019
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
variant::n_playlists
int n_playlists
Definition: hls.c:189
AVStream::time_base
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.
Definition: avformat.h:965
NULL
#define NULL
Definition: coverity.c:32
variant::playlists
struct playlist ** playlists
Definition: hls.c:190
ensure_playlist
static int ensure_playlist(HLSContext *c, struct playlist **pls, const char *url)
Definition: hls.c:603
read_probe
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
AVFMTCTX_NOHEADER
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1151
ID3v2ExtraMetaPRIV::data
uint8_t * data
Definition: id3v2.h:74
fill_buf
static void fill_buf(uint8_t *data, int w, int h, int linesize, uint8_t v)
Definition: vf_fieldmatch.c:186
playlist::renditions
struct rendition ** renditions
Definition: hls.c:162
HLSContext::playlist_pb
AVIOContext * playlist_pb
Definition: hls.c:221
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
AVFMTCTX_UNSEEKABLE
#define AVFMTCTX_UNSEEKABLE
signal that the stream is definitely not seekable, and attempts to call the seek function will fail.
Definition: avformat.h:1153
AVPacketSideData::type
enum AVPacketSideDataType type
Definition: packet.h:317
free_init_section_list
static void free_init_section_list(struct playlist *pls)
Definition: hls.c:242
HLSContext::variants
struct variant ** variants
Definition: hls.c:201
update_streams_from_subdemuxer
static int update_streams_from_subdemuxer(AVFormatContext *s, struct playlist *pls)
Definition: hls.c:1795
AV_OPT_TYPE_DICT
@ AV_OPT_TYPE_DICT
Definition: opt.h:231
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
ff_id3v2_parse_apic
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:1157
HLSContext::max_reload
int max_reload
Definition: hls.c:217
AVFormatContext::pb
AVIOContext * pb
I/O context.
Definition: avformat.h:1242
ff_http_do_new_request2
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:398
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:447
av_aes_alloc
struct AVAES * av_aes_alloc(void)
Allocate an AVAES context.
Definition: aes.c:31
AVStream::metadata
AVDictionary * metadata
Definition: avformat.h:1006
rendition_info::defaultr
char defaultr[4]
Definition: hls.c:470
HLSContext::cur_seq_no
int64_t cur_seq_no
Definition: hls.c:207
playlist::broken
int broken
Definition: hls.c:122
time.h
KeyType
KeyType
Definition: hls.c:65
playlist::id3_deferred_extra
ID3v2ExtraMeta * id3_deferred_extra
Definition: hls.c:149
HLSContext::playlists
struct playlist ** playlists
Definition: hls.c:203
playlist::n_segments
int n_segments
Definition: hls.c:119
av_packet_move_ref
void av_packet_move_ref(AVPacket *dst, AVPacket *src)
Move every field in src to dst and reset src.
Definition: avpacket.c:481
handle_init_section_args
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
MAX_FIELD_LEN
#define MAX_FIELD_LEN
Definition: hls.c:47
INITIAL_BUFFER_SIZE
#define INITIAL_BUFFER_SIZE
Definition: hls.c:45
ID3v2_HEADER_SIZE
#define ID3v2_HEADER_SIZE
Definition: id3v2.h:30
AVSTREAM_EVENT_FLAG_METADATA_UPDATED
#define AVSTREAM_EVENT_FLAG_METADATA_UPDATED
Definition: avformat.h:1068
id3_has_changed_values
static int id3_has_changed_values(struct playlist *pls, AVDictionary *metadata, ID3v2ExtraMetaAPIC *apic)
Definition: hls.c:1081
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
AVCodecID
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: codec_id.h:47
AVFormatContext::nb_streams
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1256
av_strncasecmp
int av_strncasecmp(const char *a, const char *b, size_t n)
Locale-independent case-insensitive compare.
Definition: avstring.c:225
playlist::init_sec_buf_size
unsigned int init_sec_buf_size
Definition: hls.c:132
av_rescale_rnd
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:57
options
const OptionDef options[]
avformat_find_stream_info
int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
Read packets of a media file to get stream information.
Definition: demux.c:2388
find_timestamp_in_playlist
static int find_timestamp_in_playlist(HLSContext *c, struct playlist *pls, int64_t timestamp, int64_t *seq_no)
Definition: hls.c:1661
AVIOContext
Bytestream IO Context.
Definition: avio.h:161
rendition_info::forced
char forced[4]
Definition: hls.c:471
AVMediaType
AVMediaType
Definition: avutil.h:199
AVPacket::size
int size
Definition: packet.h:374
playlist::cur_init_section
struct segment * cur_init_section
Definition: hls.c:130
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
avformat_alloc_context
AVFormatContext * avformat_alloc_context(void)
Allocate an AVFormatContext.
Definition: options.c:154
AVIOContext::buf_end
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
HLSCryptoContext
Definition: hls_sample_encryption.h:42
new_rendition
static struct rendition * new_rendition(HLSContext *c, struct rendition_info *info, const char *url_base)
Definition: hls.c:475
av_err2str
#define av_err2str(errnum)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: error.h:121
HLSContext::first_timestamp
int64_t first_timestamp
Definition: hls.c:211
FFIOContext::pub
AVIOContext pub
Definition: avio_internal.h:30
ff_copy_whiteblacklists
int ff_copy_whiteblacklists(AVFormatContext *dst, const AVFormatContext *src)
Copies the whilelists from one context to the other.
Definition: utils.c:115
playlist::cur_seg_offset
int64_t cur_seg_offset
Definition: hls.c:126
size
int size
Definition: twinvq_data.h:10344
ID3v2_DEFAULT_MAGIC
#define ID3v2_DEFAULT_MAGIC
Default magic bytes for ID3v2 header: "ID3".
Definition: id3v2.h:35
AV_NOPTS_VALUE
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
avpriv_report_missing_feature
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
AVStream::event_flags
int event_flags
Flags indicating events happening on the stream, a combination of AVSTREAM_EVENT_FLAG_*.
Definition: avformat.h:1061
hls_sample_encryption.h
rendition_info::characteristics
char characteristics[MAX_CHARACTERISTICS_LEN]
Definition: hls.c:472
av_demuxer_iterate
const AVInputFormat * av_demuxer_iterate(void **opaque)
Iterate over all registered demuxers.
Definition: allformats.c:564
PLS_TYPE_EVENT
@ PLS_TYPE_EVENT
Definition: hls.c:87
AVMEDIA_TYPE_UNKNOWN
@ AVMEDIA_TYPE_UNKNOWN
Usually treated as AVMEDIA_TYPE_DATA.
Definition: avutil.h:200
get_timebase
static AVRational get_timebase(struct playlist *pls)
Definition: hls.c:2201
AV_OPT_SEARCH_CHILDREN
#define AV_OPT_SEARCH_CHILDREN
Search in possible children of the given object first.
Definition: opt.h:559
AV_DISPOSITION_HEARING_IMPAIRED
#define AV_DISPOSITION_HEARING_IMPAIRED
The stream is intended for hearing impaired audiences.
Definition: avformat.h:857
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: packet.h:372
update_init_section
static int update_init_section(struct playlist *pls, struct segment *seg)
Definition: hls.c:1335
line
Definition: graph2dot.c:48
playlist::id3_found
int id3_found
Definition: hls.c:147
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:379
av_packet_alloc
AVPacket * av_packet_alloc(void)
Allocate an AVPacket and set its fields to default values.
Definition: avpacket.c:64
av_dict_free
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values.
Definition: dict.c:203
av_strstart
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
playlist::seek_flags
int seek_flags
Definition: hls.c:154
av_probe_input_buffer
int av_probe_input_buffer(AVIOContext *pb, const 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:315
read_data
static int read_data(void *opaque, uint8_t *buf, int buf_size)
Definition: hls.c:1445
ID3v2ExtraMetaAPIC
Definition: id3v2.h:65
rendition::playlist
struct playlist * playlist
Definition: hls.c:178
HLSAudioSetupInfo::codec_id
enum AVCodecID codec_id
Definition: hls_sample_encryption.h:49
AVBufferRef::size
size_t size
Size of data in bytes.
Definition: buffer.h:94
playlist::ctx
AVFormatContext * ctx
Definition: hls.c:106
AV_LOG_INFO
#define AV_LOG_INFO
Standard information.
Definition: log.h:191
free_segment_list
static void free_segment_list(struct playlist *pls)
Definition: hls.c:235
init_section_info::uri
char uri[MAX_URL_SIZE]
Definition: hls.c:403
ff_hls_senc_decrypt_frame
int ff_hls_senc_decrypt_frame(enum AVCodecID codec_id, HLSCryptoContext *crypto_ctx, AVPacket *pkt)
Definition: hls_sample_encryption.c:383
avcodec_parameters_copy
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
Definition: codec_par.c:72
playlist::pb
FFIOContext pb
Definition: hls.c:98
add_metadata_from_renditions
static void add_metadata_from_renditions(AVFormatContext *s, struct playlist *pls, enum AVMediaType type)
Definition: hls.c:1629
key_info::method
char method[11]
Definition: hls.c:383
next_segment
static struct segment * next_segment(struct playlist *pls)
Definition: hls.c:1027
PLS_TYPE_UNSPECIFIED
@ PLS_TYPE_UNSPECIFIED
Definition: hls.c:86
URLContext
Definition: url.h:38
playlist::key
uint8_t key[16]
Definition: hls.c:137
update_noheader_flag
static void update_noheader_flag(AVFormatContext *s)
Definition: hls.c:1820
AV_CODEC_ID_NONE
@ AV_CODEC_ID_NONE
Definition: codec_id.h:48
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:271
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:366
avio_internal.h
playlist::needed
int needed
Definition: hls.c:121
rendition::name
char name[MAX_FIELD_LEN]
Definition: hls.c:181
AV_TIME_BASE
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:254
rendition
Definition: hls.c:176
ffio_init_context
void ffio_init_context(FFIOContext *s, unsigned char *buffer, int buffer_size, int write_flag, void *opaque, int(*read_packet)(void *opaque, uint8_t *buf, int buf_size), int(*write_packet)(void *opaque, uint8_t *buf, int buf_size), int64_t(*seek)(void *opaque, int64_t offset, int whence))
Definition: aviobuf.c:81
ff_id3v2_read_dict
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:1129
select_cur_seq_no
static int64_t select_cur_seq_no(HLSContext *c, struct playlist *pls)
Definition: hls.c:1687
HLSContext::m3u8_hold_counters
int m3u8_hold_counters
Definition: hls.c:208
variant::video_group
char video_group[MAX_FIELD_LEN]
Definition: hls.c:193
AV_ROUND_DOWN
@ AV_ROUND_DOWN
Round toward -infinity.
Definition: mathematics.h:82
AV_OPT_FLAG_DECODING_PARAM
#define AV_OPT_FLAG_DECODING_PARAM
a generic parameter which can be set by the user for demuxing or decoding
Definition: opt.h:278
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
HLSContext
Definition: hls.c:197
default_reload_interval
static int64_t default_reload_interval(struct playlist *pls)
Definition: hls.c:1392
tb
#define tb
Definition: regdef.h:68
av_mallocz
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:263
AVProgram
New fields can be added to the end with minor version bumps.
Definition: avformat.h:1124
len
int len
Definition: vorbis_enc_data.h:426
HLSContext::ctx
AVFormatContext * ctx
Definition: hls.c:199
ID3v2ExtraMetaPRIV::datasize
uint32_t datasize
Definition: id3v2.h:75
open_url_keepalive
static int open_url_keepalive(AVFormatContext *s, AVIOContext **pb, const char *url, AVDictionary **options)
Definition: hls.c:613
free_playlist_list
static void free_playlist_list(HLSContext *c)
Definition: hls.c:253
ff_hls_senc_parse_audio_setup_info
int ff_hls_senc_parse_audio_setup_info(AVStream *st, HLSAudioSetupInfo *info)
Definition: hls_sample_encryption.c:89
PlaylistType
PlaylistType
Definition: hls.c:85
rendition_info::language
char language[MAX_FIELD_LEN]
Definition: hls.c:467
playlist::parent
AVFormatContext * parent
Definition: hls.c:104
AVStream::disposition
int disposition
Stream disposition - a combination of AV_DISPOSITION_* flags.
Definition: avformat.h:995
AV_DISPOSITION_VISUAL_IMPAIRED
#define AV_DISPOSITION_VISUAL_IMPAIRED
The stream is intended for visually impaired audiences.
Definition: avformat.h:861
HLSContext::http_persistent
int http_persistent
Definition: hls.c:218
ff_id3v2_tag_len
int ff_id3v2_tag_len(const uint8_t *buf)
Get the length of an ID3v2 tag.
Definition: id3v2.c:156
av_compare_mod
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:159
AVStream::id
int id
Format-specific stream ID.
Definition: avformat.h:949
ret
ret
Definition: filter_design.txt:187
read_packet
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
AVStream
Stream structure.
Definition: avformat.h:935
playlist::index
int index
Definition: hls.c:105
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:260
FFSWAP
#define FFSWAP(type, a, b)
Definition: macros.h:52
AVClass::class_name
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:71
playlist::audio_setup_info
HLSAudioSetupInfo audio_setup_info
Definition: hls.c:151
pos
unsigned int pos
Definition: spdifenc.c:412
avformat.h
dict.h
AV_INPUT_BUFFER_PADDING_SIZE
#define AV_INPUT_BUFFER_PADDING_SIZE
Definition: defs.h:40
playlist::m3u8_hold_counters
int m3u8_hold_counters
Definition: hls.c:125
AV_DICT_MATCH_CASE
#define AV_DICT_MATCH_CASE
Only get an entry with exact-case key match.
Definition: dict.h:67
open_input
static int open_input(HLSContext *c, struct playlist *pls, struct segment *seg, AVIOContext **in)
Definition: hls.c:1252
hls_read_seek
static int hls_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: hls.c:2363
new_playlist
static struct playlist * new_playlist(HLSContext *c, const char *url, const char *base)
Definition: hls.c:303
HLSContext::live_start_index
int live_start_index
Definition: hls.c:209
set_stream_info_from_input_stream
static int set_stream_info_from_input_stream(AVStream *st, struct playlist *pls, AVStream *ist)
Definition: hls.c:1762
ID3v2ExtraMeta::data
union ID3v2ExtraMeta::@258 data
AVStream::index
int index
stream index in AVFormatContext
Definition: avformat.h:943
playlist::main_streams
AVStream ** main_streams
Definition: hls.c:112
MAX_URL_SIZE
#define MAX_URL_SIZE
Definition: internal.h:33
playlist::id3_initial
AVDictionary * id3_initial
Definition: hls.c:146
parse_playlist
static int parse_playlist(HLSContext *c, const char *url, struct playlist *pls, AVIOContext *in)
Definition: hls.c:718
rendition_info
Definition: hls.c:463
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:224
init_section_info::byterange
char byterange[32]
Definition: hls.c:404
avformat_free_context
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:688
AVFMT_NOGENSEARCH
#define AVFMT_NOGENSEARCH
Format does not allow to fall back on generic search.
Definition: avformat.h:482
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:641
ff_parse_key_val_cb
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:614
AVFormatContext::io_open
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:1759
AVIOContext::eof_reached
int eof_reached
true if was unable to read due to error or eof
Definition: avio.h:239
playlist::last_seq_no
int64_t last_seq_no
Definition: hls.c:124
variant::bandwidth
int bandwidth
Definition: hls.c:186
avpriv_set_pts_info
void avpriv_set_pts_info(AVStream *st, 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:1196
AVPacket::stream_index
int stream_index
Definition: packet.h:375
segment
Definition: hls.c:71
av_dict_set_int
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
AVIO_FLAG_READ
#define AVIO_FLAG_READ
read-only
Definition: avio.h:621
add_stream_to_programs
static void add_stream_to_programs(AVFormatContext *s, struct playlist *pls, AVStream *stream)
Definition: hls.c:1736
av_strdup
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:279
hls_probe
static int hls_probe(const AVProbeData *p)
Definition: hls.c:2446
rendition_info::name
char name[MAX_FIELD_LEN]
Definition: hls.c:469
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
playlist::is_id3_timestamped
int is_id3_timestamped
Definition: hls.c:141
AVFMT_TS_DISCONT
#define AVFMT_TS_DISCONT
Format allows timestamp discontinuities.
Definition: avformat.h:477
playlist::init_sec_data_len
unsigned int init_sec_data_len
Definition: hls.c:133
hls_read_packet
static int hls_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: hls.c:2218
AVIOContext::buffer
unsigned char * buffer
Start of the buffer.
Definition: avio.h:226
handle_variant_args
static void handle_variant_args(struct variant_info *info, const char *key, int key_len, char **dest, int *dest_len)
Definition: hls.c:363
diff
static av_always_inline int diff(const uint32_t a, const uint32_t b)
Definition: vf_palettegen.c:139
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34
AVDictionaryEntry
Definition: dict.h:79
ff_make_absolute_url
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
variant_info::bandwidth
char bandwidth[20]
Definition: hls.c:330
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
AVPacket
This structure stores compressed data.
Definition: packet.h:350
ff_read_frame_flush
void ff_read_frame_flush(AVFormatContext *s)
Flush the frame reader.
Definition: seek.c:714
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Definition: opt.h:241
segment::url
char * url
Definition: hls.c:75
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
av_dict_set
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
av_fast_malloc
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:560
av_dict_copy
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:217
ff_id3v2_free_extra_meta
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1141
segment::init_section
struct segment * init_section
Definition: hls.c:80
av_stream_new_side_data
uint8_t * av_stream_new_side_data(AVStream *stream, enum AVPacketSideDataType type, size_t size)
Allocate new information from stream.
Definition: utils.c:1772
avio_find_protocol_name
const char * avio_find_protocol_name(const char *url)
Return the name of the protocol that will handle the passed URL.
Definition: avio.c:467
FFStream::need_context_update
int need_context_update
Whether the internal avctx needs to be updated from codecpar (after a late change to codecpar)
Definition: internal.h:238
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
AVERROR_BUG
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:52
av_strlcpy
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
av_opt_get
int av_opt_get(void *obj, const char *name, int search_flags, uint8_t **out_val)
Definition: opt.c:782
playlist::last_load_time
int64_t last_load_time
Definition: hls.c:127
ff_id3v2_parse_priv
int ff_id3v2_parse_priv(AVFormatContext *s, ID3v2ExtraMeta *extra_meta)
Add metadata for all PRIV tags in the ID3v2 header.
Definition: id3v2.c:1253
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
rendition::disposition
int disposition
Definition: hls.c:182
playlist::url
char url[MAX_URL_SIZE]
Definition: hls.c:97
AVERROR_EXIT
#define AVERROR_EXIT
Immediate exit was requested; the called function should not be restarted.
Definition: error.h:58
playlist::id3_changed
int id3_changed
Definition: hls.c:148
AVDictionaryEntry::value
char * value
Definition: dict.h:81
segment::iv
uint8_t iv[16]
Definition: hls.c:78
avstring.h
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Definition: opt.h:228
HLSAudioSetupInfo
Definition: hls_sample_encryption.h:48
handle_key_args
static void handle_key_args(struct key_info *info, const char *key, int key_len, char **dest, int *dest_len)
Definition: hls.c:387
parse_id3
static void parse_id3(AVFormatContext *s, AVIOContext *pb, AVDictionary **metadata, int64_t *dts, HLSAudioSetupInfo *audio_setup_info, ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta **extra_meta)
Definition: hls.c:1052
http.h
AVIOContext::buf_ptr
unsigned char * buf_ptr
Current position in the buffer.
Definition: avio.h:228
read_from_url
static int read_from_url(struct playlist *pls, struct segment *seg, uint8_t *buf, int buf_size)
Definition: hls.c:1035
ff_id3v2_parse_priv_dict
int ff_id3v2_parse_priv_dict(AVDictionary **metadata, ID3v2ExtraMeta *extra_meta)
Parse PRIV tags into a dictionary.
Definition: id3v2.c:1213
AVERROR_PROTOCOL_NOT_FOUND
#define AVERROR_PROTOCOL_NOT_FOUND
Protocol not found.
Definition: error.h:65
snprintf
#define snprintf
Definition: snprintf.h:34
AVFormatContext::priv_data
void * priv_data
Format private data.
Definition: avformat.h:1228
intercept_id3
static void intercept_id3(struct playlist *pls, uint8_t *buf, int buf_size, int *len)
Definition: hls.c:1152
rendition::language
char language[MAX_FIELD_LEN]
Definition: hls.c:180
ID3v2ExtraMetaPRIV
Definition: id3v2.h:72
ffio_geturlcontext
URLContext * ffio_geturlcontext(AVIOContext *s)
Return the URLContext associated with the AVIOContext.
Definition: aviobuf.c:1012
AV_RB64
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_RB64
Definition: bytestream.h:95
ID3v2ExtraMetaPRIV::owner
uint8_t * owner
Definition: id3v2.h:73
HLSContext::renditions
struct rendition ** renditions
Definition: hls.c:205
AVFMT_EVENT_FLAG_METADATA_UPDATED
#define AVFMT_EVENT_FLAG_METADATA_UPDATED
Definition: avformat.h:1517
rendition_info::group_id
char group_id[MAX_FIELD_LEN]
Definition: hls.c:466
ff_id3v2_match
int ff_id3v2_match(const uint8_t *buf, const char *magic)
Detect ID3v2 Header.
Definition: id3v2.c:143
ff_format_io_close
int ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:1848
key_info
Definition: hls.c:381
ff_hls_demuxer
const AVInputFormat ff_hls_demuxer
Definition: hls.c:2491
playlist::pkt
AVPacket * pkt
Definition: hls.c:107
ff_parse_key_value
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:1222
playlist::has_noheader_flag
int has_noheader_flag
Definition: hls.c:108
avio_feof
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:375
av_program_add_stream_index
void av_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
ID3v2ExtraMeta::priv
ID3v2ExtraMetaPRIV priv
Definition: id3v2.h:91