FFmpeg  3.4.9
hls.c
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1 /*
2  * Apple HTTP Live Streaming demuxer
3  * Copyright (c) 2010 Martin Storsjo
4  * Copyright (c) 2013 Anssi Hannula
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 /**
24  * @file
25  * Apple HTTP Live Streaming demuxer
26  * http://tools.ietf.org/html/draft-pantos-http-live-streaming
27  */
28 
29 #include "libavutil/avstring.h"
30 #include "libavutil/avassert.h"
31 #include "libavutil/intreadwrite.h"
32 #include "libavutil/mathematics.h"
33 #include "libavutil/opt.h"
34 #include "libavutil/dict.h"
35 #include "libavutil/time.h"
36 #include "avformat.h"
37 #include "internal.h"
38 #include "avio_internal.h"
39 #include "id3v2.h"
40 
41 #define INITIAL_BUFFER_SIZE 32768
42 
43 #define MAX_FIELD_LEN 64
44 #define MAX_CHARACTERISTICS_LEN 512
45 
46 #define MPEG_TIME_BASE 90000
47 #define MPEG_TIME_BASE_Q (AVRational){1, MPEG_TIME_BASE}
48 
49 /*
50  * An apple http stream consists of a playlist with media segment files,
51  * played sequentially. There may be several playlists with the same
52  * video content, in different bandwidth variants, that are played in
53  * parallel (preferably only one bandwidth variant at a time). In this case,
54  * the user supplied the url to a main playlist that only lists the variant
55  * playlists.
56  *
57  * If the main playlist doesn't point at any variants, we still create
58  * one anonymous toplevel variant for this, to maintain the structure.
59  */
60 
61 enum KeyType {
65 };
66 
67 struct segment {
68  int64_t duration;
69  int64_t url_offset;
70  int64_t size;
71  char *url;
72  char *key;
74  uint8_t iv[16];
75  /* associated Media Initialization Section, treated as a segment */
77 };
78 
79 struct rendition;
80 
85 };
86 
87 /*
88  * Each playlist has its own demuxer. If it currently is active,
89  * it has an open AVIOContext too, and potentially an AVPacket
90  * containing the next packet from this stream.
91  */
92 struct playlist {
98  int index;
102 
103  /* main demuxer streams associated with this playlist
104  * indexed by the subdemuxer stream indexes */
107 
108  int finished;
109  enum PlaylistType type;
113  struct segment **segments;
114  int needed, cur_needed;
116  int64_t cur_seg_offset;
117  int64_t last_load_time;
118 
119  /* Currently active Media Initialization Section */
122  unsigned int init_sec_buf_size;
123  unsigned int init_sec_data_len;
125 
126  char key_url[MAX_URL_SIZE];
128 
129  /* ID3 timestamp handling (elementary audio streams have ID3 timestamps
130  * (and possibly other ID3 tags) in the beginning of each segment) */
131  int is_id3_timestamped; /* -1: not yet known */
132  int64_t id3_mpegts_timestamp; /* in mpegts tb */
133  int64_t id3_offset; /* in stream original tb */
134  uint8_t* id3_buf; /* temp buffer for id3 parsing */
135  unsigned int id3_buf_size;
136  AVDictionary *id3_initial; /* data from first id3 tag */
137  int id3_found; /* ID3 tag found at some point */
138  int id3_changed; /* ID3 tag data has changed at some point */
139  ID3v2ExtraMeta *id3_deferred_extra; /* stored here until subdemuxer is opened */
140 
141  int64_t seek_timestamp;
143  int seek_stream_index; /* into subdemuxer stream array */
144 
145  /* Renditions associated with this playlist, if any.
146  * Alternative rendition playlists have a single rendition associated
147  * with them, and variant main Media Playlists may have
148  * multiple (playlist-less) renditions associated with them. */
151 
152  /* Media Initialization Sections (EXT-X-MAP) associated with this
153  * playlist, if any. */
156 };
157 
158 /*
159  * Renditions are e.g. alternative subtitle or audio streams.
160  * The rendition may either be an external playlist or it may be
161  * contained in the main Media Playlist of the variant (in which case
162  * playlist is NULL).
163  */
164 struct rendition {
165  enum AVMediaType type;
167  char group_id[MAX_FIELD_LEN];
168  char language[MAX_FIELD_LEN];
171 };
172 
173 struct variant {
175 
176  /* every variant contains at least the main Media Playlist in index 0 */
178  struct playlist **playlists;
179 
180  char audio_group[MAX_FIELD_LEN];
181  char video_group[MAX_FIELD_LEN];
182  char subtitles_group[MAX_FIELD_LEN];
183 };
184 
185 typedef struct HLSContext {
186  AVClass *class;
189  struct variant **variants;
191  struct playlist **playlists;
194 
199  int64_t cur_timestamp;
201  char *user_agent; ///< holds HTTP user agent set as an AVOption to the HTTP protocol context
202  char *cookies; ///< holds HTTP cookie values set in either the initial response or as an AVOption to the HTTP protocol context
203  char *headers; ///< holds HTTP headers set as an AVOption to the HTTP protocol context
204  char *http_proxy; ///< holds the address of the HTTP proxy server
209 } HLSContext;
210 
211 static int read_chomp_line(AVIOContext *s, char *buf, int maxlen)
212 {
213  int len = ff_get_line(s, buf, maxlen);
214  while (len > 0 && av_isspace(buf[len - 1]))
215  buf[--len] = '\0';
216  return len;
217 }
218 
219 static void free_segment_list(struct playlist *pls)
220 {
221  int i;
222  for (i = 0; i < pls->n_segments; i++) {
223  av_freep(&pls->segments[i]->key);
224  av_freep(&pls->segments[i]->url);
225  av_freep(&pls->segments[i]);
226  }
227  av_freep(&pls->segments);
228  pls->n_segments = 0;
229 }
230 
231 static void free_init_section_list(struct playlist *pls)
232 {
233  int i;
234  for (i = 0; i < pls->n_init_sections; i++) {
235  av_freep(&pls->init_sections[i]->url);
236  av_freep(&pls->init_sections[i]);
237  }
238  av_freep(&pls->init_sections);
239  pls->n_init_sections = 0;
240 }
241 
243 {
244  int i;
245  for (i = 0; i < c->n_playlists; i++) {
246  struct playlist *pls = c->playlists[i];
247  free_segment_list(pls);
249  av_freep(&pls->main_streams);
250  av_freep(&pls->renditions);
251  av_freep(&pls->id3_buf);
252  av_dict_free(&pls->id3_initial);
254  av_freep(&pls->init_sec_buf);
255  av_packet_unref(&pls->pkt);
256  av_freep(&pls->pb.buffer);
257  if (pls->input)
258  ff_format_io_close(c->ctx, &pls->input);
259  if (pls->ctx) {
260  pls->ctx->pb = NULL;
261  avformat_close_input(&pls->ctx);
262  }
263  av_free(pls);
264  }
265  av_freep(&c->playlists);
266  av_freep(&c->cookies);
267  av_freep(&c->user_agent);
268  av_freep(&c->headers);
269  av_freep(&c->http_proxy);
270  c->n_playlists = 0;
271 }
272 
274 {
275  int i;
276  for (i = 0; i < c->n_variants; i++) {
277  struct variant *var = c->variants[i];
278  av_freep(&var->playlists);
279  av_free(var);
280  }
281  av_freep(&c->variants);
282  c->n_variants = 0;
283 }
284 
286 {
287  int i;
288  for (i = 0; i < c->n_renditions; i++)
289  av_freep(&c->renditions[i]);
290  av_freep(&c->renditions);
291  c->n_renditions = 0;
292 }
293 
294 /*
295  * Used to reset a statically allocated AVPacket to a clean slate,
296  * containing no data.
297  */
298 static void reset_packet(AVPacket *pkt)
299 {
300  av_init_packet(pkt);
301  pkt->data = NULL;
302 }
303 
304 static struct playlist *new_playlist(HLSContext *c, const char *url,
305  const char *base)
306 {
307  struct playlist *pls = av_mallocz(sizeof(struct playlist));
308  if (!pls)
309  return NULL;
310  reset_packet(&pls->pkt);
311  ff_make_absolute_url(pls->url, sizeof(pls->url), base, url);
313 
314  pls->is_id3_timestamped = -1;
316 
317  dynarray_add(&c->playlists, &c->n_playlists, pls);
318  return pls;
319 }
320 
321 struct variant_info {
322  char bandwidth[20];
323  /* variant group ids: */
324  char audio[MAX_FIELD_LEN];
325  char video[MAX_FIELD_LEN];
326  char subtitles[MAX_FIELD_LEN];
327 };
328 
329 static struct variant *new_variant(HLSContext *c, struct variant_info *info,
330  const char *url, const char *base)
331 {
332  struct variant *var;
333  struct playlist *pls;
334 
335  pls = new_playlist(c, url, base);
336  if (!pls)
337  return NULL;
338 
339  var = av_mallocz(sizeof(struct variant));
340  if (!var)
341  return NULL;
342 
343  if (info) {
344  var->bandwidth = atoi(info->bandwidth);
345  strcpy(var->audio_group, info->audio);
346  strcpy(var->video_group, info->video);
347  strcpy(var->subtitles_group, info->subtitles);
348  }
349 
350  dynarray_add(&c->variants, &c->n_variants, var);
351  dynarray_add(&var->playlists, &var->n_playlists, pls);
352  return var;
353 }
354 
355 static void handle_variant_args(struct variant_info *info, const char *key,
356  int key_len, char **dest, int *dest_len)
357 {
358  if (!strncmp(key, "BANDWIDTH=", key_len)) {
359  *dest = info->bandwidth;
360  *dest_len = sizeof(info->bandwidth);
361  } else if (!strncmp(key, "AUDIO=", key_len)) {
362  *dest = info->audio;
363  *dest_len = sizeof(info->audio);
364  } else if (!strncmp(key, "VIDEO=", key_len)) {
365  *dest = info->video;
366  *dest_len = sizeof(info->video);
367  } else if (!strncmp(key, "SUBTITLES=", key_len)) {
368  *dest = info->subtitles;
369  *dest_len = sizeof(info->subtitles);
370  }
371 }
372 
373 struct key_info {
374  char uri[MAX_URL_SIZE];
375  char method[11];
376  char iv[35];
377 };
378 
379 static void handle_key_args(struct key_info *info, const char *key,
380  int key_len, char **dest, int *dest_len)
381 {
382  if (!strncmp(key, "METHOD=", key_len)) {
383  *dest = info->method;
384  *dest_len = sizeof(info->method);
385  } else if (!strncmp(key, "URI=", key_len)) {
386  *dest = info->uri;
387  *dest_len = sizeof(info->uri);
388  } else if (!strncmp(key, "IV=", key_len)) {
389  *dest = info->iv;
390  *dest_len = sizeof(info->iv);
391  }
392 }
393 
395  char uri[MAX_URL_SIZE];
396  char byterange[32];
397 };
398 
399 static struct segment *new_init_section(struct playlist *pls,
400  struct init_section_info *info,
401  const char *url_base)
402 {
403  struct segment *sec;
404  char *ptr;
405  char tmp_str[MAX_URL_SIZE];
406 
407  if (!info->uri[0])
408  return NULL;
409 
410  sec = av_mallocz(sizeof(*sec));
411  if (!sec)
412  return NULL;
413 
414  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url_base, info->uri);
415  sec->url = av_strdup(tmp_str);
416  if (!sec->url) {
417  av_free(sec);
418  return NULL;
419  }
420 
421  if (info->byterange[0]) {
422  sec->size = strtoll(info->byterange, NULL, 10);
423  ptr = strchr(info->byterange, '@');
424  if (ptr)
425  sec->url_offset = strtoll(ptr+1, NULL, 10);
426  } else {
427  /* the entire file is the init section */
428  sec->size = -1;
429  }
430 
431  dynarray_add(&pls->init_sections, &pls->n_init_sections, sec);
432 
433  return sec;
434 }
435 
436 static void handle_init_section_args(struct init_section_info *info, const char *key,
437  int key_len, char **dest, int *dest_len)
438 {
439  if (!strncmp(key, "URI=", key_len)) {
440  *dest = info->uri;
441  *dest_len = sizeof(info->uri);
442  } else if (!strncmp(key, "BYTERANGE=", key_len)) {
443  *dest = info->byterange;
444  *dest_len = sizeof(info->byterange);
445  }
446 }
447 
449  char type[16];
450  char uri[MAX_URL_SIZE];
451  char group_id[MAX_FIELD_LEN];
452  char language[MAX_FIELD_LEN];
453  char assoc_language[MAX_FIELD_LEN];
455  char defaultr[4];
456  char forced[4];
457  char characteristics[MAX_CHARACTERISTICS_LEN];
458 };
459 
460 static struct rendition *new_rendition(HLSContext *c, struct rendition_info *info,
461  const char *url_base)
462 {
463  struct rendition *rend;
465  char *characteristic;
466  char *chr_ptr;
467  char *saveptr;
468 
469  if (!strcmp(info->type, "AUDIO"))
470  type = AVMEDIA_TYPE_AUDIO;
471  else if (!strcmp(info->type, "VIDEO"))
472  type = AVMEDIA_TYPE_VIDEO;
473  else if (!strcmp(info->type, "SUBTITLES"))
474  type = AVMEDIA_TYPE_SUBTITLE;
475  else if (!strcmp(info->type, "CLOSED-CAPTIONS"))
476  /* CLOSED-CAPTIONS is ignored since we do not support CEA-608 CC in
477  * AVC SEI RBSP anyway */
478  return NULL;
479 
480  if (type == AVMEDIA_TYPE_UNKNOWN)
481  return NULL;
482 
483  /* URI is mandatory for subtitles as per spec */
484  if (type == AVMEDIA_TYPE_SUBTITLE && !info->uri[0])
485  return NULL;
486 
487  /* TODO: handle subtitles (each segment has to parsed separately) */
489  if (type == AVMEDIA_TYPE_SUBTITLE)
490  return NULL;
491 
492  rend = av_mallocz(sizeof(struct rendition));
493  if (!rend)
494  return NULL;
495 
496  dynarray_add(&c->renditions, &c->n_renditions, rend);
497 
498  rend->type = type;
499  strcpy(rend->group_id, info->group_id);
500  strcpy(rend->language, info->language);
501  strcpy(rend->name, info->name);
502 
503  /* add the playlist if this is an external rendition */
504  if (info->uri[0]) {
505  rend->playlist = new_playlist(c, info->uri, url_base);
506  if (rend->playlist)
508  &rend->playlist->n_renditions, rend);
509  }
510 
511  if (info->assoc_language[0]) {
512  int langlen = strlen(rend->language);
513  if (langlen < sizeof(rend->language) - 3) {
514  rend->language[langlen] = ',';
515  strncpy(rend->language + langlen + 1, info->assoc_language,
516  sizeof(rend->language) - langlen - 2);
517  }
518  }
519 
520  if (!strcmp(info->defaultr, "YES"))
522  if (!strcmp(info->forced, "YES"))
524 
525  chr_ptr = info->characteristics;
526  while ((characteristic = av_strtok(chr_ptr, ",", &saveptr))) {
527  if (!strcmp(characteristic, "public.accessibility.describes-music-and-sound"))
529  else if (!strcmp(characteristic, "public.accessibility.describes-video"))
531 
532  chr_ptr = NULL;
533  }
534 
535  return rend;
536 }
537 
538 static void handle_rendition_args(struct rendition_info *info, const char *key,
539  int key_len, char **dest, int *dest_len)
540 {
541  if (!strncmp(key, "TYPE=", key_len)) {
542  *dest = info->type;
543  *dest_len = sizeof(info->type);
544  } else if (!strncmp(key, "URI=", key_len)) {
545  *dest = info->uri;
546  *dest_len = sizeof(info->uri);
547  } else if (!strncmp(key, "GROUP-ID=", key_len)) {
548  *dest = info->group_id;
549  *dest_len = sizeof(info->group_id);
550  } else if (!strncmp(key, "LANGUAGE=", key_len)) {
551  *dest = info->language;
552  *dest_len = sizeof(info->language);
553  } else if (!strncmp(key, "ASSOC-LANGUAGE=", key_len)) {
554  *dest = info->assoc_language;
555  *dest_len = sizeof(info->assoc_language);
556  } else if (!strncmp(key, "NAME=", key_len)) {
557  *dest = info->name;
558  *dest_len = sizeof(info->name);
559  } else if (!strncmp(key, "DEFAULT=", key_len)) {
560  *dest = info->defaultr;
561  *dest_len = sizeof(info->defaultr);
562  } else if (!strncmp(key, "FORCED=", key_len)) {
563  *dest = info->forced;
564  *dest_len = sizeof(info->forced);
565  } else if (!strncmp(key, "CHARACTERISTICS=", key_len)) {
566  *dest = info->characteristics;
567  *dest_len = sizeof(info->characteristics);
568  }
569  /*
570  * ignored:
571  * - AUTOSELECT: client may autoselect based on e.g. system language
572  * - INSTREAM-ID: EIA-608 closed caption number ("CC1".."CC4")
573  */
574 }
575 
576 /* used by parse_playlist to allocate a new variant+playlist when the
577  * playlist is detected to be a Media Playlist (not Master Playlist)
578  * and we have no parent Master Playlist (parsing of which would have
579  * allocated the variant and playlist already)
580  * *pls == NULL => Master Playlist or parentless Media Playlist
581  * *pls != NULL => parented Media Playlist, playlist+variant allocated */
582 static int ensure_playlist(HLSContext *c, struct playlist **pls, const char *url)
583 {
584  if (*pls)
585  return 0;
586  if (!new_variant(c, NULL, url, NULL))
587  return AVERROR(ENOMEM);
588  *pls = c->playlists[c->n_playlists - 1];
589  return 0;
590 }
591 
592 static void update_options(char **dest, const char *name, void *src)
593 {
594  av_freep(dest);
595  av_opt_get(src, name, AV_OPT_SEARCH_CHILDREN, (uint8_t**)dest);
596  if (*dest && !strlen(*dest))
597  av_freep(dest);
598 }
599 
600 static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url,
601  AVDictionary *opts, AVDictionary *opts2, int *is_http)
602 {
603  HLSContext *c = s->priv_data;
604  AVDictionary *tmp = NULL;
605  const char *proto_name = NULL;
606  int ret;
607 
608  av_dict_copy(&tmp, opts, 0);
609  av_dict_copy(&tmp, opts2, 0);
610 
611  if (av_strstart(url, "crypto", NULL)) {
612  if (url[6] == '+' || url[6] == ':')
613  proto_name = avio_find_protocol_name(url + 7);
614  }
615 
616  if (!proto_name)
617  proto_name = avio_find_protocol_name(url);
618 
619  if (!proto_name)
620  return AVERROR_INVALIDDATA;
621 
622  // only http(s) & file are allowed
623  if (av_strstart(proto_name, "file", NULL)) {
624  if (strcmp(c->allowed_extensions, "ALL") && !av_match_ext(url, c->allowed_extensions)) {
625  av_log(s, AV_LOG_ERROR,
626  "Filename extension of \'%s\' is not a common multimedia extension, blocked for security reasons.\n"
627  "If you wish to override this adjust allowed_extensions, you can set it to \'ALL\' to allow all\n",
628  url);
629  return AVERROR_INVALIDDATA;
630  }
631  } else if (av_strstart(proto_name, "http", NULL)) {
632  ;
633  } else
634  return AVERROR_INVALIDDATA;
635 
636  if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':')
637  ;
638  else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':')
639  ;
640  else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))
641  return AVERROR_INVALIDDATA;
642 
643  ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
644  if (ret >= 0) {
645  // update cookies on http response with setcookies.
646  char *new_cookies = NULL;
647 
648  if (!(s->flags & AVFMT_FLAG_CUSTOM_IO))
649  av_opt_get(*pb, "cookies", AV_OPT_SEARCH_CHILDREN, (uint8_t**)&new_cookies);
650 
651  if (new_cookies) {
652  av_free(c->cookies);
653  c->cookies = new_cookies;
654  }
655 
656  av_dict_set(&opts, "cookies", c->cookies, 0);
657  }
658 
659  av_dict_free(&tmp);
660 
661  if (is_http)
662  *is_http = av_strstart(proto_name, "http", NULL);
663 
664  return ret;
665 }
666 
667 static int parse_playlist(HLSContext *c, const char *url,
668  struct playlist *pls, AVIOContext *in)
669 {
670  int ret = 0, is_segment = 0, is_variant = 0;
671  int64_t duration = 0;
672  enum KeyType key_type = KEY_NONE;
673  uint8_t iv[16] = "";
674  int has_iv = 0;
675  char key[MAX_URL_SIZE] = "";
676  char line[MAX_URL_SIZE];
677  const char *ptr;
678  int close_in = 0;
679  int64_t seg_offset = 0;
680  int64_t seg_size = -1;
681  uint8_t *new_url = NULL;
682  struct variant_info variant_info;
683  char tmp_str[MAX_URL_SIZE];
684  struct segment *cur_init_section = NULL;
685 
686  if (!in) {
687 #if 1
689  close_in = 1;
690  /* Some HLS servers don't like being sent the range header */
691  av_dict_set(&opts, "seekable", "0", 0);
692 
693  // broker prior HTTP options that should be consistent across requests
694  av_dict_set(&opts, "user_agent", c->user_agent, 0);
695  av_dict_set(&opts, "cookies", c->cookies, 0);
696  av_dict_set(&opts, "headers", c->headers, 0);
697  av_dict_set(&opts, "http_proxy", c->http_proxy, 0);
698 
699  ret = c->ctx->io_open(c->ctx, &in, url, AVIO_FLAG_READ, &opts);
700  av_dict_free(&opts);
701  if (ret < 0)
702  return ret;
703 #else
704  ret = open_in(c, &in, url);
705  if (ret < 0)
706  return ret;
707  close_in = 1;
708 #endif
709  }
710 
711  if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >= 0)
712  url = new_url;
713 
714  read_chomp_line(in, line, sizeof(line));
715  if (strcmp(line, "#EXTM3U")) {
716  ret = AVERROR_INVALIDDATA;
717  goto fail;
718  }
719 
720  if (pls) {
721  free_segment_list(pls);
722  pls->finished = 0;
723  pls->type = PLS_TYPE_UNSPECIFIED;
724  }
725  while (!avio_feof(in)) {
726  read_chomp_line(in, line, sizeof(line));
727  if (av_strstart(line, "#EXT-X-STREAM-INF:", &ptr)) {
728  is_variant = 1;
729  memset(&variant_info, 0, sizeof(variant_info));
731  &variant_info);
732  } else if (av_strstart(line, "#EXT-X-KEY:", &ptr)) {
733  struct key_info info = {{0}};
735  &info);
736  key_type = KEY_NONE;
737  has_iv = 0;
738  if (!strcmp(info.method, "AES-128"))
739  key_type = KEY_AES_128;
740  if (!strcmp(info.method, "SAMPLE-AES"))
741  key_type = KEY_SAMPLE_AES;
742  if (!strncmp(info.iv, "0x", 2) || !strncmp(info.iv, "0X", 2)) {
743  ff_hex_to_data(iv, info.iv + 2);
744  has_iv = 1;
745  }
746  av_strlcpy(key, info.uri, sizeof(key));
747  } else if (av_strstart(line, "#EXT-X-MEDIA:", &ptr)) {
748  struct rendition_info info = {{0}};
750  &info);
751  new_rendition(c, &info, url);
752  } else if (av_strstart(line, "#EXT-X-TARGETDURATION:", &ptr)) {
753  ret = ensure_playlist(c, &pls, url);
754  if (ret < 0)
755  goto fail;
756  pls->target_duration = strtoll(ptr, NULL, 10) * AV_TIME_BASE;
757  } else if (av_strstart(line, "#EXT-X-MEDIA-SEQUENCE:", &ptr)) {
758  ret = ensure_playlist(c, &pls, url);
759  if (ret < 0)
760  goto fail;
761  pls->start_seq_no = atoi(ptr);
762  } else if (av_strstart(line, "#EXT-X-PLAYLIST-TYPE:", &ptr)) {
763  ret = ensure_playlist(c, &pls, url);
764  if (ret < 0)
765  goto fail;
766  if (!strcmp(ptr, "EVENT"))
767  pls->type = PLS_TYPE_EVENT;
768  else if (!strcmp(ptr, "VOD"))
769  pls->type = PLS_TYPE_VOD;
770  } else if (av_strstart(line, "#EXT-X-MAP:", &ptr)) {
771  struct init_section_info info = {{0}};
772  ret = ensure_playlist(c, &pls, url);
773  if (ret < 0)
774  goto fail;
776  &info);
777  cur_init_section = new_init_section(pls, &info, url);
778  } else if (av_strstart(line, "#EXT-X-ENDLIST", &ptr)) {
779  if (pls)
780  pls->finished = 1;
781  } else if (av_strstart(line, "#EXTINF:", &ptr)) {
782  is_segment = 1;
783  duration = atof(ptr) * AV_TIME_BASE;
784  } else if (av_strstart(line, "#EXT-X-BYTERANGE:", &ptr)) {
785  seg_size = strtoll(ptr, NULL, 10);
786  ptr = strchr(ptr, '@');
787  if (ptr)
788  seg_offset = strtoll(ptr+1, NULL, 10);
789  } else if (av_strstart(line, "#", NULL)) {
790  continue;
791  } else if (line[0]) {
792  if (is_variant) {
793  if (!new_variant(c, &variant_info, line, url)) {
794  ret = AVERROR(ENOMEM);
795  goto fail;
796  }
797  is_variant = 0;
798  }
799  if (is_segment) {
800  struct segment *seg;
801  if (!pls) {
802  if (!new_variant(c, 0, url, NULL)) {
803  ret = AVERROR(ENOMEM);
804  goto fail;
805  }
806  pls = c->playlists[c->n_playlists - 1];
807  }
808  seg = av_malloc(sizeof(struct segment));
809  if (!seg) {
810  ret = AVERROR(ENOMEM);
811  goto fail;
812  }
813  if (has_iv) {
814  memcpy(seg->iv, iv, sizeof(iv));
815  } else {
816  int seq = pls->start_seq_no + pls->n_segments;
817  memset(seg->iv, 0, sizeof(seg->iv));
818  AV_WB32(seg->iv + 12, seq);
819  }
820 
821  if (key_type != KEY_NONE) {
822  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, key);
823  seg->key = av_strdup(tmp_str);
824  if (!seg->key) {
825  av_free(seg);
826  ret = AVERROR(ENOMEM);
827  goto fail;
828  }
829  } else {
830  seg->key = NULL;
831  }
832 
833  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, line);
834  seg->url = av_strdup(tmp_str);
835  if (!seg->url) {
836  av_free(seg->key);
837  av_free(seg);
838  ret = AVERROR(ENOMEM);
839  goto fail;
840  }
841 
842  if (duration < 0.001 * AV_TIME_BASE) {
843  av_log(c->ctx, AV_LOG_WARNING, "Cannot get correct #EXTINF value of segment %s,"
844  " set to default value to 1ms.\n", seg->url);
845  duration = 0.001 * AV_TIME_BASE;
846  }
847  seg->duration = duration;
848  seg->key_type = key_type;
849  dynarray_add(&pls->segments, &pls->n_segments, seg);
850  is_segment = 0;
851 
852  seg->size = seg_size;
853  if (seg_size >= 0) {
854  seg->url_offset = seg_offset;
855  seg_offset += seg_size;
856  seg_size = -1;
857  } else {
858  seg->url_offset = 0;
859  seg_offset = 0;
860  }
861 
862  seg->init_section = cur_init_section;
863  }
864  }
865  }
866  if (pls)
868 
869 fail:
870  av_free(new_url);
871  if (close_in)
872  ff_format_io_close(c->ctx, &in);
873  return ret;
874 }
875 
876 static struct segment *current_segment(struct playlist *pls)
877 {
878  return pls->segments[pls->cur_seq_no - pls->start_seq_no];
879 }
880 
884 };
885 
886 static int read_from_url(struct playlist *pls, struct segment *seg,
887  uint8_t *buf, int buf_size,
888  enum ReadFromURLMode mode)
889 {
890  int ret;
891 
892  /* limit read if the segment was only a part of a file */
893  if (seg->size >= 0)
894  buf_size = FFMIN(buf_size, seg->size - pls->cur_seg_offset);
895 
896  if (mode == READ_COMPLETE) {
897  ret = avio_read(pls->input, buf, buf_size);
898  if (ret != buf_size)
899  av_log(NULL, AV_LOG_ERROR, "Could not read complete segment.\n");
900  } else
901  ret = avio_read(pls->input, buf, buf_size);
902 
903  if (ret > 0)
904  pls->cur_seg_offset += ret;
905 
906  return ret;
907 }
908 
909 /* Parse the raw ID3 data and pass contents to caller */
911  AVDictionary **metadata, int64_t *dts,
912  ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta **extra_meta)
913 {
914  static const char id3_priv_owner_ts[] = "com.apple.streaming.transportStreamTimestamp";
915  ID3v2ExtraMeta *meta;
916 
917  ff_id3v2_read_dict(pb, metadata, ID3v2_DEFAULT_MAGIC, extra_meta);
918  for (meta = *extra_meta; meta; meta = meta->next) {
919  if (!strcmp(meta->tag, "PRIV")) {
920  ID3v2ExtraMetaPRIV *priv = meta->data;
921  if (priv->datasize == 8 && !strcmp(priv->owner, id3_priv_owner_ts)) {
922  /* 33-bit MPEG timestamp */
923  int64_t ts = AV_RB64(priv->data);
924  av_log(s, AV_LOG_DEBUG, "HLS ID3 audio timestamp %"PRId64"\n", ts);
925  if ((ts & ~((1ULL << 33) - 1)) == 0)
926  *dts = ts;
927  else
928  av_log(s, AV_LOG_ERROR, "Invalid HLS ID3 audio timestamp %"PRId64"\n", ts);
929  }
930  } else if (!strcmp(meta->tag, "APIC") && apic)
931  *apic = meta->data;
932  }
933 }
934 
935 /* Check if the ID3 metadata contents have changed */
936 static int id3_has_changed_values(struct playlist *pls, AVDictionary *metadata,
937  ID3v2ExtraMetaAPIC *apic)
938 {
939  AVDictionaryEntry *entry = NULL;
940  AVDictionaryEntry *oldentry;
941  /* check that no keys have changed values */
942  while ((entry = av_dict_get(metadata, "", entry, AV_DICT_IGNORE_SUFFIX))) {
943  oldentry = av_dict_get(pls->id3_initial, entry->key, NULL, AV_DICT_MATCH_CASE);
944  if (!oldentry || strcmp(oldentry->value, entry->value) != 0)
945  return 1;
946  }
947 
948  /* check if apic appeared */
949  if (apic && (pls->ctx->nb_streams != 2 || !pls->ctx->streams[1]->attached_pic.data))
950  return 1;
951 
952  if (apic) {
953  int size = pls->ctx->streams[1]->attached_pic.size;
954  if (size != apic->buf->size - AV_INPUT_BUFFER_PADDING_SIZE)
955  return 1;
956 
957  if (memcmp(apic->buf->data, pls->ctx->streams[1]->attached_pic.data, size) != 0)
958  return 1;
959  }
960 
961  return 0;
962 }
963 
964 /* Parse ID3 data and handle the found data */
965 static void handle_id3(AVIOContext *pb, struct playlist *pls)
966 {
967  AVDictionary *metadata = NULL;
968  ID3v2ExtraMetaAPIC *apic = NULL;
969  ID3v2ExtraMeta *extra_meta = NULL;
970  int64_t timestamp = AV_NOPTS_VALUE;
971 
972  parse_id3(pls->ctx, pb, &metadata, &timestamp, &apic, &extra_meta);
973 
974  if (timestamp != AV_NOPTS_VALUE) {
975  pls->id3_mpegts_timestamp = timestamp;
976  pls->id3_offset = 0;
977  }
978 
979  if (!pls->id3_found) {
980  /* initial ID3 tags */
982  pls->id3_found = 1;
983 
984  /* get picture attachment and set text metadata */
985  if (pls->ctx->nb_streams)
986  ff_id3v2_parse_apic(pls->ctx, &extra_meta);
987  else
988  /* demuxer not yet opened, defer picture attachment */
989  pls->id3_deferred_extra = extra_meta;
990 
991  av_dict_copy(&pls->ctx->metadata, metadata, 0);
992  pls->id3_initial = metadata;
993 
994  } else {
995  if (!pls->id3_changed && id3_has_changed_values(pls, metadata, apic)) {
996  avpriv_report_missing_feature(pls->ctx, "Changing ID3 metadata in HLS audio elementary stream");
997  pls->id3_changed = 1;
998  }
999  av_dict_free(&metadata);
1000  }
1001 
1002  if (!pls->id3_deferred_extra)
1003  ff_id3v2_free_extra_meta(&extra_meta);
1004 }
1005 
1006 static void intercept_id3(struct playlist *pls, uint8_t *buf,
1007  int buf_size, int *len)
1008 {
1009  /* intercept id3 tags, we do not want to pass them to the raw
1010  * demuxer on all segment switches */
1011  int bytes;
1012  int id3_buf_pos = 0;
1013  int fill_buf = 0;
1014  struct segment *seg = current_segment(pls);
1015 
1016  /* gather all the id3 tags */
1017  while (1) {
1018  /* see if we can retrieve enough data for ID3 header */
1019  if (*len < ID3v2_HEADER_SIZE && buf_size >= ID3v2_HEADER_SIZE) {
1020  bytes = read_from_url(pls, seg, buf + *len, ID3v2_HEADER_SIZE - *len, READ_COMPLETE);
1021  if (bytes > 0) {
1022 
1023  if (bytes == ID3v2_HEADER_SIZE - *len)
1024  /* no EOF yet, so fill the caller buffer again after
1025  * we have stripped the ID3 tags */
1026  fill_buf = 1;
1027 
1028  *len += bytes;
1029 
1030  } else if (*len <= 0) {
1031  /* error/EOF */
1032  *len = bytes;
1033  fill_buf = 0;
1034  }
1035  }
1036 
1037  if (*len < ID3v2_HEADER_SIZE)
1038  break;
1039 
1040  if (ff_id3v2_match(buf, ID3v2_DEFAULT_MAGIC)) {
1041  int64_t maxsize = seg->size >= 0 ? seg->size : 1024*1024;
1042  int taglen = ff_id3v2_tag_len(buf);
1043  int tag_got_bytes = FFMIN(taglen, *len);
1044  int remaining = taglen - tag_got_bytes;
1045 
1046  if (taglen > maxsize) {
1047  av_log(pls->ctx, AV_LOG_ERROR, "Too large HLS ID3 tag (%d > %"PRId64" bytes)\n",
1048  taglen, maxsize);
1049  break;
1050  }
1051 
1052  /*
1053  * Copy the id3 tag to our temporary id3 buffer.
1054  * We could read a small id3 tag directly without memcpy, but
1055  * we would still need to copy the large tags, and handling
1056  * both of those cases together with the possibility for multiple
1057  * tags would make the handling a bit complex.
1058  */
1059  pls->id3_buf = av_fast_realloc(pls->id3_buf, &pls->id3_buf_size, id3_buf_pos + taglen);
1060  if (!pls->id3_buf)
1061  break;
1062  memcpy(pls->id3_buf + id3_buf_pos, buf, tag_got_bytes);
1063  id3_buf_pos += tag_got_bytes;
1064 
1065  /* strip the intercepted bytes */
1066  *len -= tag_got_bytes;
1067  memmove(buf, buf + tag_got_bytes, *len);
1068  av_log(pls->ctx, AV_LOG_DEBUG, "Stripped %d HLS ID3 bytes\n", tag_got_bytes);
1069 
1070  if (remaining > 0) {
1071  /* read the rest of the tag in */
1072  if (read_from_url(pls, seg, pls->id3_buf + id3_buf_pos, remaining, READ_COMPLETE) != remaining)
1073  break;
1074  id3_buf_pos += remaining;
1075  av_log(pls->ctx, AV_LOG_DEBUG, "Stripped additional %d HLS ID3 bytes\n", remaining);
1076  }
1077 
1078  } else {
1079  /* no more ID3 tags */
1080  break;
1081  }
1082  }
1083 
1084  /* re-fill buffer for the caller unless EOF */
1085  if (*len >= 0 && (fill_buf || *len == 0)) {
1086  bytes = read_from_url(pls, seg, buf + *len, buf_size - *len, READ_NORMAL);
1087 
1088  /* ignore error if we already had some data */
1089  if (bytes >= 0)
1090  *len += bytes;
1091  else if (*len == 0)
1092  *len = bytes;
1093  }
1094 
1095  if (pls->id3_buf) {
1096  /* Now parse all the ID3 tags */
1097  AVIOContext id3ioctx;
1098  ffio_init_context(&id3ioctx, pls->id3_buf, id3_buf_pos, 0, NULL, NULL, NULL, NULL);
1099  handle_id3(&id3ioctx, pls);
1100  }
1101 
1102  if (pls->is_id3_timestamped == -1)
1104 }
1105 
1106 static int open_input(HLSContext *c, struct playlist *pls, struct segment *seg)
1107 {
1108  AVDictionary *opts = NULL;
1109  int ret;
1110  int is_http = 0;
1111 
1112  // broker prior HTTP options that should be consistent across requests
1113  av_dict_set(&opts, "user_agent", c->user_agent, 0);
1114  av_dict_set(&opts, "cookies", c->cookies, 0);
1115  av_dict_set(&opts, "headers", c->headers, 0);
1116  av_dict_set(&opts, "http_proxy", c->http_proxy, 0);
1117  av_dict_set(&opts, "seekable", "0", 0);
1118 
1119  if (seg->size >= 0) {
1120  /* try to restrict the HTTP request to the part we want
1121  * (if this is in fact a HTTP request) */
1122  av_dict_set_int(&opts, "offset", seg->url_offset, 0);
1123  av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
1124  }
1125 
1126  av_log(pls->parent, AV_LOG_VERBOSE, "HLS request for url '%s', offset %"PRId64", playlist %d\n",
1127  seg->url, seg->url_offset, pls->index);
1128 
1129  if (seg->key_type == KEY_NONE) {
1130  ret = open_url(pls->parent, &pls->input, seg->url, c->avio_opts, opts, &is_http);
1131  } else if (seg->key_type == KEY_AES_128) {
1132  AVDictionary *opts2 = NULL;
1133  char iv[33], key[33], url[MAX_URL_SIZE];
1134  if (strcmp(seg->key, pls->key_url)) {
1135  AVIOContext *pb;
1136  if (open_url(pls->parent, &pb, seg->key, c->avio_opts, opts, NULL) == 0) {
1137  ret = avio_read(pb, pls->key, sizeof(pls->key));
1138  if (ret != sizeof(pls->key)) {
1139  av_log(NULL, AV_LOG_ERROR, "Unable to read key file %s\n",
1140  seg->key);
1141  }
1142  ff_format_io_close(pls->parent, &pb);
1143  } else {
1144  av_log(NULL, AV_LOG_ERROR, "Unable to open key file %s\n",
1145  seg->key);
1146  }
1147  av_strlcpy(pls->key_url, seg->key, sizeof(pls->key_url));
1148  }
1149  ff_data_to_hex(iv, seg->iv, sizeof(seg->iv), 0);
1150  ff_data_to_hex(key, pls->key, sizeof(pls->key), 0);
1151  iv[32] = key[32] = '\0';
1152  if (strstr(seg->url, "://"))
1153  snprintf(url, sizeof(url), "crypto+%s", seg->url);
1154  else
1155  snprintf(url, sizeof(url), "crypto:%s", seg->url);
1156 
1157  av_dict_copy(&opts2, c->avio_opts, 0);
1158  av_dict_set(&opts2, "key", key, 0);
1159  av_dict_set(&opts2, "iv", iv, 0);
1160 
1161  ret = open_url(pls->parent, &pls->input, url, opts2, opts, &is_http);
1162 
1163  av_dict_free(&opts2);
1164 
1165  if (ret < 0) {
1166  goto cleanup;
1167  }
1168  ret = 0;
1169  } else if (seg->key_type == KEY_SAMPLE_AES) {
1170  av_log(pls->parent, AV_LOG_ERROR,
1171  "SAMPLE-AES encryption is not supported yet\n");
1172  ret = AVERROR_PATCHWELCOME;
1173  }
1174  else
1175  ret = AVERROR(ENOSYS);
1176 
1177  /* Seek to the requested position. If this was a HTTP request, the offset
1178  * should already be where want it to, but this allows e.g. local testing
1179  * without a HTTP server.
1180  *
1181  * This is not done for HTTP at all as avio_seek() does internal bookkeeping
1182  * of file offset which is out-of-sync with the actual offset when "offset"
1183  * AVOption is used with http protocol, causing the seek to not be a no-op
1184  * as would be expected. Wrong offset received from the server will not be
1185  * noticed without the call, though.
1186  */
1187  if (ret == 0 && !is_http && seg->key_type == KEY_NONE && seg->url_offset) {
1188  int64_t seekret = avio_seek(pls->input, seg->url_offset, SEEK_SET);
1189  if (seekret < 0) {
1190  av_log(pls->parent, AV_LOG_ERROR, "Unable to seek to offset %"PRId64" of HLS segment '%s'\n", seg->url_offset, seg->url);
1191  ret = seekret;
1192  ff_format_io_close(pls->parent, &pls->input);
1193  }
1194  }
1195 
1196 cleanup:
1197  av_dict_free(&opts);
1198  pls->cur_seg_offset = 0;
1199  return ret;
1200 }
1201 
1202 static int update_init_section(struct playlist *pls, struct segment *seg)
1203 {
1204  static const int max_init_section_size = 1024*1024;
1205  HLSContext *c = pls->parent->priv_data;
1206  int64_t sec_size;
1207  int64_t urlsize;
1208  int ret;
1209 
1210  if (seg->init_section == pls->cur_init_section)
1211  return 0;
1212 
1213  pls->cur_init_section = NULL;
1214 
1215  if (!seg->init_section)
1216  return 0;
1217 
1218  ret = open_input(c, pls, seg->init_section);
1219  if (ret < 0) {
1221  "Failed to open an initialization section in playlist %d\n",
1222  pls->index);
1223  return ret;
1224  }
1225 
1226  if (seg->init_section->size >= 0)
1227  sec_size = seg->init_section->size;
1228  else if ((urlsize = avio_size(pls->input)) >= 0)
1229  sec_size = urlsize;
1230  else
1231  sec_size = max_init_section_size;
1232 
1233  av_log(pls->parent, AV_LOG_DEBUG,
1234  "Downloading an initialization section of size %"PRId64"\n",
1235  sec_size);
1236 
1237  sec_size = FFMIN(sec_size, max_init_section_size);
1238 
1239  av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size);
1240 
1241  ret = read_from_url(pls, seg->init_section, pls->init_sec_buf,
1243  ff_format_io_close(pls->parent, &pls->input);
1244 
1245  if (ret < 0)
1246  return ret;
1247 
1248  pls->cur_init_section = seg->init_section;
1249  pls->init_sec_data_len = ret;
1250  pls->init_sec_buf_read_offset = 0;
1251 
1252  /* spec says audio elementary streams do not have media initialization
1253  * sections, so there should be no ID3 timestamps */
1254  pls->is_id3_timestamped = 0;
1255 
1256  return 0;
1257 }
1258 
1259 static int64_t default_reload_interval(struct playlist *pls)
1260 {
1261  return pls->n_segments > 0 ?
1262  pls->segments[pls->n_segments - 1]->duration :
1263  pls->target_duration;
1264 }
1265 
1266 static int read_data(void *opaque, uint8_t *buf, int buf_size)
1267 {
1268  struct playlist *v = opaque;
1269  HLSContext *c = v->parent->priv_data;
1270  int ret, i;
1271  int just_opened = 0;
1272  int reload_count = 0;
1273 
1274 restart:
1275  if (!v->needed)
1276  return AVERROR_EOF;
1277 
1278  if (!v->input) {
1279  int64_t reload_interval;
1280  struct segment *seg;
1281 
1282  /* Check that the playlist is still needed before opening a new
1283  * segment. */
1284  if (v->ctx && v->ctx->nb_streams) {
1285  v->needed = 0;
1286  for (i = 0; i < v->n_main_streams; i++) {
1287  if (v->main_streams[i]->discard < AVDISCARD_ALL) {
1288  v->needed = 1;
1289  break;
1290  }
1291  }
1292  }
1293  if (!v->needed) {
1294  av_log(v->parent, AV_LOG_INFO, "No longer receiving playlist %d\n",
1295  v->index);
1296  return AVERROR_EOF;
1297  }
1298 
1299  /* If this is a live stream and the reload interval has elapsed since
1300  * the last playlist reload, reload the playlists now. */
1301  reload_interval = default_reload_interval(v);
1302 
1303 reload:
1304  reload_count++;
1305  if (reload_count > c->max_reload)
1306  return AVERROR_EOF;
1307  if (!v->finished &&
1308  av_gettime_relative() - v->last_load_time >= reload_interval) {
1309  if ((ret = parse_playlist(c, v->url, v, NULL)) < 0) {
1310  av_log(v->parent, AV_LOG_WARNING, "Failed to reload playlist %d\n",
1311  v->index);
1312  return ret;
1313  }
1314  /* If we need to reload the playlist again below (if
1315  * there's still no more segments), switch to a reload
1316  * interval of half the target duration. */
1317  reload_interval = v->target_duration / 2;
1318  }
1319  if (v->cur_seq_no < v->start_seq_no) {
1321  "skipping %d segments ahead, expired from playlists\n",
1322  v->start_seq_no - v->cur_seq_no);
1323  v->cur_seq_no = v->start_seq_no;
1324  }
1325  if (v->cur_seq_no >= v->start_seq_no + v->n_segments) {
1326  if (v->finished)
1327  return AVERROR_EOF;
1328  while (av_gettime_relative() - v->last_load_time < reload_interval) {
1330  return AVERROR_EXIT;
1331  av_usleep(100*1000);
1332  }
1333  /* Enough time has elapsed since the last reload */
1334  goto reload;
1335  }
1336 
1337  seg = current_segment(v);
1338 
1339  /* load/update Media Initialization Section, if any */
1340  ret = update_init_section(v, seg);
1341  if (ret)
1342  return ret;
1343 
1344  ret = open_input(c, v, seg);
1345  if (ret < 0) {
1347  return AVERROR_EXIT;
1348  av_log(v->parent, AV_LOG_WARNING, "Failed to open segment of playlist %d\n",
1349  v->index);
1350  v->cur_seq_no += 1;
1351  goto reload;
1352  }
1353  just_opened = 1;
1354  }
1355 
1357  /* Push init section out first before first actual segment */
1358  int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size);
1359  memcpy(buf, v->init_sec_buf, copy_size);
1360  v->init_sec_buf_read_offset += copy_size;
1361  return copy_size;
1362  }
1363 
1364  ret = read_from_url(v, current_segment(v), buf, buf_size, READ_NORMAL);
1365  if (ret > 0) {
1366  if (just_opened && v->is_id3_timestamped != 0) {
1367  /* Intercept ID3 tags here, elementary audio streams are required
1368  * to convey timestamps using them in the beginning of each segment. */
1369  intercept_id3(v, buf, buf_size, &ret);
1370  }
1371 
1372  return ret;
1373  }
1374  ff_format_io_close(v->parent, &v->input);
1375  v->cur_seq_no++;
1376 
1377  c->cur_seq_no = v->cur_seq_no;
1378 
1379  goto restart;
1380 }
1381 
1382 static void add_renditions_to_variant(HLSContext *c, struct variant *var,
1383  enum AVMediaType type, const char *group_id)
1384 {
1385  int i;
1386 
1387  for (i = 0; i < c->n_renditions; i++) {
1388  struct rendition *rend = c->renditions[i];
1389 
1390  if (rend->type == type && !strcmp(rend->group_id, group_id)) {
1391 
1392  if (rend->playlist)
1393  /* rendition is an external playlist
1394  * => add the playlist to the variant */
1395  dynarray_add(&var->playlists, &var->n_playlists, rend->playlist);
1396  else
1397  /* rendition is part of the variant main Media Playlist
1398  * => add the rendition to the main Media Playlist */
1399  dynarray_add(&var->playlists[0]->renditions,
1400  &var->playlists[0]->n_renditions,
1401  rend);
1402  }
1403  }
1404 }
1405 
1407  enum AVMediaType type)
1408 {
1409  int rend_idx = 0;
1410  int i;
1411 
1412  for (i = 0; i < pls->n_main_streams; i++) {
1413  AVStream *st = pls->main_streams[i];
1414 
1415  if (st->codecpar->codec_type != type)
1416  continue;
1417 
1418  for (; rend_idx < pls->n_renditions; rend_idx++) {
1419  struct rendition *rend = pls->renditions[rend_idx];
1420 
1421  if (rend->type != type)
1422  continue;
1423 
1424  if (rend->language[0])
1425  av_dict_set(&st->metadata, "language", rend->language, 0);
1426  if (rend->name[0])
1427  av_dict_set(&st->metadata, "comment", rend->name, 0);
1428 
1429  st->disposition |= rend->disposition;
1430  }
1431  if (rend_idx >=pls->n_renditions)
1432  break;
1433  }
1434 }
1435 
1436 /* if timestamp was in valid range: returns 1 and sets seq_no
1437  * if not: returns 0 and sets seq_no to closest segment */
1439  int64_t timestamp, int *seq_no)
1440 {
1441  int i;
1442  int64_t pos = c->first_timestamp == AV_NOPTS_VALUE ?
1443  0 : c->first_timestamp;
1444 
1445  if (timestamp < pos) {
1446  *seq_no = pls->start_seq_no;
1447  return 0;
1448  }
1449 
1450  for (i = 0; i < pls->n_segments; i++) {
1451  int64_t diff = pos + pls->segments[i]->duration - timestamp;
1452  if (diff > 0) {
1453  *seq_no = pls->start_seq_no + i;
1454  return 1;
1455  }
1456  pos += pls->segments[i]->duration;
1457  }
1458 
1459  *seq_no = pls->start_seq_no + pls->n_segments - 1;
1460 
1461  return 0;
1462 }
1463 
1464 static int select_cur_seq_no(HLSContext *c, struct playlist *pls)
1465 {
1466  int seq_no;
1467 
1468  if (!pls->finished && !c->first_packet &&
1470  /* reload the playlist since it was suspended */
1471  parse_playlist(c, pls->url, pls, NULL);
1472 
1473  /* If playback is already in progress (we are just selecting a new
1474  * playlist) and this is a complete file, find the matching segment
1475  * by counting durations. */
1476  if (pls->finished && c->cur_timestamp != AV_NOPTS_VALUE) {
1477  find_timestamp_in_playlist(c, pls, c->cur_timestamp, &seq_no);
1478  return seq_no;
1479  }
1480 
1481  if (!pls->finished) {
1482  if (!c->first_packet && /* we are doing a segment selection during playback */
1483  c->cur_seq_no >= pls->start_seq_no &&
1484  c->cur_seq_no < pls->start_seq_no + pls->n_segments)
1485  /* While spec 3.4.3 says that we cannot assume anything about the
1486  * content at the same sequence number on different playlists,
1487  * in practice this seems to work and doing it otherwise would
1488  * require us to download a segment to inspect its timestamps. */
1489  return c->cur_seq_no;
1490 
1491  /* If this is a live stream, start live_start_index segments from the
1492  * start or end */
1493  if (c->live_start_index < 0)
1494  return pls->start_seq_no + FFMAX(pls->n_segments + c->live_start_index, 0);
1495  else
1496  return pls->start_seq_no + FFMIN(c->live_start_index, pls->n_segments - 1);
1497  }
1498 
1499  /* Otherwise just start on the first segment. */
1500  return pls->start_seq_no;
1501 }
1502 
1504 {
1505  HLSContext *c = s->priv_data;
1506  static const char * const opts[] = {
1507  "headers", "http_proxy", "user_agent", "user-agent", "cookies", NULL };
1508  const char * const * opt = opts;
1509  uint8_t *buf;
1510  int ret = 0;
1511 
1512  while (*opt) {
1513  if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN | AV_OPT_ALLOW_NULL, &buf) >= 0) {
1514  ret = av_dict_set(&c->avio_opts, *opt, buf,
1516  if (ret < 0)
1517  return ret;
1518  }
1519  opt++;
1520  }
1521 
1522  return ret;
1523 }
1524 
1525 static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url,
1526  int flags, AVDictionary **opts)
1527 {
1528  av_log(s, AV_LOG_ERROR,
1529  "A HLS playlist item '%s' referred to an external file '%s'. "
1530  "Opening this file was forbidden for security reasons\n",
1531  s->filename, url);
1532  return AVERROR(EPERM);
1533 }
1534 
1535 static void add_stream_to_programs(AVFormatContext *s, struct playlist *pls, AVStream *stream)
1536 {
1537  HLSContext *c = s->priv_data;
1538  int i, j;
1539  int bandwidth = -1;
1540 
1541  for (i = 0; i < c->n_variants; i++) {
1542  struct variant *v = c->variants[i];
1543 
1544  for (j = 0; j < v->n_playlists; j++) {
1545  if (v->playlists[j] != pls)
1546  continue;
1547 
1548  av_program_add_stream_index(s, i, stream->index);
1549 
1550  if (bandwidth < 0)
1551  bandwidth = v->bandwidth;
1552  else if (bandwidth != v->bandwidth)
1553  bandwidth = -1; /* stream in multiple variants with different bandwidths */
1554  }
1555  }
1556 
1557  if (bandwidth >= 0)
1558  av_dict_set_int(&stream->metadata, "variant_bitrate", bandwidth, 0);
1559 }
1560 
1562 {
1563  int err;
1564 
1565  err = avcodec_parameters_copy(st->codecpar, ist->codecpar);
1566  if (err < 0)
1567  return err;
1568 
1569  if (pls->is_id3_timestamped) /* custom timestamps via id3 */
1570  avpriv_set_pts_info(st, 33, 1, MPEG_TIME_BASE);
1571  else
1573 
1574  st->internal->need_context_update = 1;
1575 
1576  return 0;
1577 }
1578 
1579 /* add new subdemuxer streams to our context, if any */
1581 {
1582  int err;
1583 
1584  while (pls->n_main_streams < pls->ctx->nb_streams) {
1585  int ist_idx = pls->n_main_streams;
1586  AVStream *st = avformat_new_stream(s, NULL);
1587  AVStream *ist = pls->ctx->streams[ist_idx];
1588 
1589  if (!st)
1590  return AVERROR(ENOMEM);
1591 
1592  st->id = pls->index;
1593  dynarray_add(&pls->main_streams, &pls->n_main_streams, st);
1594 
1595  add_stream_to_programs(s, pls, st);
1596 
1597  err = set_stream_info_from_input_stream(st, pls, ist);
1598  if (err < 0)
1599  return err;
1600  }
1601 
1602  return 0;
1603 }
1604 
1606 {
1607  HLSContext *c = s->priv_data;
1608  int flag_needed = 0;
1609  int i;
1610 
1611  for (i = 0; i < c->n_playlists; i++) {
1612  struct playlist *pls = c->playlists[i];
1613 
1614  if (pls->has_noheader_flag) {
1615  flag_needed = 1;
1616  break;
1617  }
1618  }
1619 
1620  if (flag_needed)
1622  else
1624 }
1625 
1627 {
1628  HLSContext *c = s->priv_data;
1629 
1630  free_playlist_list(c);
1631  free_variant_list(c);
1633 
1634  av_dict_free(&c->avio_opts);
1635 
1636  return 0;
1637 }
1638 
1640 {
1641  void *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb;
1642  HLSContext *c = s->priv_data;
1643  int ret = 0, i;
1644  int highest_cur_seq_no = 0;
1645 
1646  c->ctx = s;
1647  c->interrupt_callback = &s->interrupt_callback;
1648  c->strict_std_compliance = s->strict_std_compliance;
1649 
1650  c->first_packet = 1;
1651  c->first_timestamp = AV_NOPTS_VALUE;
1652  c->cur_timestamp = AV_NOPTS_VALUE;
1653 
1654  if (u) {
1655  // get the previous user agent & set back to null if string size is zero
1656  update_options(&c->user_agent, "user_agent", u);
1657 
1658  // get the previous cookies & set back to null if string size is zero
1659  update_options(&c->cookies, "cookies", u);
1660 
1661  // get the previous headers & set back to null if string size is zero
1662  update_options(&c->headers, "headers", u);
1663 
1664  // get the previous http proxt & set back to null if string size is zero
1665  update_options(&c->http_proxy, "http_proxy", u);
1666  }
1667 
1668  if ((ret = parse_playlist(c, s->filename, NULL, s->pb)) < 0)
1669  goto fail;
1670 
1671  if ((ret = save_avio_options(s)) < 0)
1672  goto fail;
1673 
1674  /* Some HLS servers don't like being sent the range header */
1675  av_dict_set(&c->avio_opts, "seekable", "0", 0);
1676 
1677  if (c->n_variants == 0) {
1678  av_log(NULL, AV_LOG_WARNING, "Empty playlist\n");
1679  ret = AVERROR_EOF;
1680  goto fail;
1681  }
1682  /* If the playlist only contained playlists (Master Playlist),
1683  * parse each individual playlist. */
1684  if (c->n_playlists > 1 || c->playlists[0]->n_segments == 0) {
1685  for (i = 0; i < c->n_playlists; i++) {
1686  struct playlist *pls = c->playlists[i];
1687  if ((ret = parse_playlist(c, pls->url, pls, NULL)) < 0)
1688  goto fail;
1689  }
1690  }
1691 
1692  if (c->variants[0]->playlists[0]->n_segments == 0) {
1693  av_log(NULL, AV_LOG_WARNING, "Empty playlist\n");
1694  ret = AVERROR_EOF;
1695  goto fail;
1696  }
1697 
1698  /* If this isn't a live stream, calculate the total duration of the
1699  * stream. */
1700  if (c->variants[0]->playlists[0]->finished) {
1701  int64_t duration = 0;
1702  for (i = 0; i < c->variants[0]->playlists[0]->n_segments; i++)
1703  duration += c->variants[0]->playlists[0]->segments[i]->duration;
1704  s->duration = duration;
1705  }
1706 
1707  /* Associate renditions with variants */
1708  for (i = 0; i < c->n_variants; i++) {
1709  struct variant *var = c->variants[i];
1710 
1711  if (var->audio_group[0])
1713  if (var->video_group[0])
1715  if (var->subtitles_group[0])
1717  }
1718 
1719  /* Create a program for each variant */
1720  for (i = 0; i < c->n_variants; i++) {
1721  struct variant *v = c->variants[i];
1722  AVProgram *program;
1723 
1724  program = av_new_program(s, i);
1725  if (!program)
1726  goto fail;
1727  av_dict_set_int(&program->metadata, "variant_bitrate", v->bandwidth, 0);
1728  }
1729 
1730  /* Select the starting segments */
1731  for (i = 0; i < c->n_playlists; i++) {
1732  struct playlist *pls = c->playlists[i];
1733 
1734  if (pls->n_segments == 0)
1735  continue;
1736 
1737  pls->cur_seq_no = select_cur_seq_no(c, pls);
1738  highest_cur_seq_no = FFMAX(highest_cur_seq_no, pls->cur_seq_no);
1739  }
1740 
1741  /* Open the demuxer for each playlist */
1742  for (i = 0; i < c->n_playlists; i++) {
1743  struct playlist *pls = c->playlists[i];
1744  AVInputFormat *in_fmt = NULL;
1745  char *url;
1746 
1747  if (!(pls->ctx = avformat_alloc_context())) {
1748  ret = AVERROR(ENOMEM);
1749  goto fail;
1750  }
1751 
1752  if (pls->n_segments == 0)
1753  continue;
1754 
1755  pls->index = i;
1756  pls->needed = 1;
1757  pls->parent = s;
1758 
1759  /*
1760  * If this is a live stream and this playlist looks like it is one segment
1761  * behind, try to sync it up so that every substream starts at the same
1762  * time position (so e.g. avformat_find_stream_info() will see packets from
1763  * all active streams within the first few seconds). This is not very generic,
1764  * though, as the sequence numbers are technically independent.
1765  */
1766  if (!pls->finished && pls->cur_seq_no == highest_cur_seq_no - 1 &&
1767  highest_cur_seq_no < pls->start_seq_no + pls->n_segments) {
1768  pls->cur_seq_no = highest_cur_seq_no;
1769  }
1770 
1772  if (!pls->read_buffer){
1773  ret = AVERROR(ENOMEM);
1774  avformat_free_context(pls->ctx);
1775  pls->ctx = NULL;
1776  goto fail;
1777  }
1778  ffio_init_context(&pls->pb, pls->read_buffer, INITIAL_BUFFER_SIZE, 0, pls,
1779  read_data, NULL, NULL);
1780  pls->pb.seekable = 0;
1781  url = av_strdup(pls->segments[0]->url);
1782  ret = av_probe_input_buffer(&pls->pb, &in_fmt, url, NULL, 0, 0);
1783  av_free(url);
1784  if (ret < 0) {
1785  /* Free the ctx - it isn't initialized properly at this point,
1786  * so avformat_close_input shouldn't be called. If
1787  * avformat_open_input fails below, it frees and zeros the
1788  * context, so it doesn't need any special treatment like this. */
1789  av_log(s, AV_LOG_ERROR, "Error when loading first segment '%s'\n", pls->segments[0]->url);
1790  avformat_free_context(pls->ctx);
1791  pls->ctx = NULL;
1792  goto fail;
1793  }
1794  pls->ctx->pb = &pls->pb;
1795  pls->ctx->io_open = nested_io_open;
1796  pls->ctx->flags |= s->flags & ~AVFMT_FLAG_CUSTOM_IO;
1797 
1798  if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
1799  goto fail;
1800 
1801  ret = avformat_open_input(&pls->ctx, pls->segments[0]->url, in_fmt, NULL);
1802  if (ret < 0)
1803  goto fail;
1804 
1805  if (pls->id3_deferred_extra && pls->ctx->nb_streams == 1) {
1809  pls->id3_deferred_extra = NULL;
1810  }
1811 
1812  if (pls->is_id3_timestamped == -1)
1813  av_log(s, AV_LOG_WARNING, "No expected HTTP requests have been made\n");
1814 
1815  /*
1816  * For ID3 timestamped raw audio streams we need to detect the packet
1817  * durations to calculate timestamps in fill_timing_for_id3_timestamped_stream(),
1818  * but for other streams we can rely on our user calling avformat_find_stream_info()
1819  * on us if they want to.
1820  */
1821  if (pls->is_id3_timestamped) {
1822  ret = avformat_find_stream_info(pls->ctx, NULL);
1823  if (ret < 0)
1824  goto fail;
1825  }
1826 
1827  pls->has_noheader_flag = !!(pls->ctx->ctx_flags & AVFMTCTX_NOHEADER);
1828 
1829  /* Create new AVStreams for each stream in this playlist */
1830  ret = update_streams_from_subdemuxer(s, pls);
1831  if (ret < 0)
1832  goto fail;
1833 
1837  }
1838 
1840 
1841  return 0;
1842 fail:
1843  hls_close(s);
1844  return ret;
1845 }
1846 
1847 static int recheck_discard_flags(AVFormatContext *s, int first)
1848 {
1849  HLSContext *c = s->priv_data;
1850  int i, changed = 0;
1851 
1852  /* Check if any new streams are needed */
1853  for (i = 0; i < c->n_playlists; i++)
1854  c->playlists[i]->cur_needed = 0;
1855 
1856  for (i = 0; i < s->nb_streams; i++) {
1857  AVStream *st = s->streams[i];
1858  struct playlist *pls = c->playlists[s->streams[i]->id];
1859  if (st->discard < AVDISCARD_ALL)
1860  pls->cur_needed = 1;
1861  }
1862  for (i = 0; i < c->n_playlists; i++) {
1863  struct playlist *pls = c->playlists[i];
1864  if (pls->cur_needed && !pls->needed) {
1865  pls->needed = 1;
1866  changed = 1;
1867  pls->cur_seq_no = select_cur_seq_no(c, pls);
1868  pls->pb.eof_reached = 0;
1869  if (c->cur_timestamp != AV_NOPTS_VALUE) {
1870  /* catch up */
1871  pls->seek_timestamp = c->cur_timestamp;
1872  pls->seek_flags = AVSEEK_FLAG_ANY;
1873  pls->seek_stream_index = -1;
1874  }
1875  av_log(s, AV_LOG_INFO, "Now receiving playlist %d, segment %d\n", i, pls->cur_seq_no);
1876  } else if (first && !pls->cur_needed && pls->needed) {
1877  if (pls->input)
1878  ff_format_io_close(pls->parent, &pls->input);
1879  pls->needed = 0;
1880  changed = 1;
1881  av_log(s, AV_LOG_INFO, "No longer receiving playlist %d\n", i);
1882  }
1883  }
1884  return changed;
1885 }
1886 
1888 {
1889  if (pls->id3_offset >= 0) {
1890  pls->pkt.dts = pls->id3_mpegts_timestamp +
1891  av_rescale_q(pls->id3_offset,
1892  pls->ctx->streams[pls->pkt.stream_index]->time_base,
1894  if (pls->pkt.duration)
1895  pls->id3_offset += pls->pkt.duration;
1896  else
1897  pls->id3_offset = -1;
1898  } else {
1899  /* there have been packets with unknown duration
1900  * since the last id3 tag, should not normally happen */
1901  pls->pkt.dts = AV_NOPTS_VALUE;
1902  }
1903 
1904  if (pls->pkt.duration)
1905  pls->pkt.duration = av_rescale_q(pls->pkt.duration,
1906  pls->ctx->streams[pls->pkt.stream_index]->time_base,
1908 
1909  pls->pkt.pts = AV_NOPTS_VALUE;
1910 }
1911 
1912 static AVRational get_timebase(struct playlist *pls)
1913 {
1914  if (pls->is_id3_timestamped)
1915  return MPEG_TIME_BASE_Q;
1916 
1917  return pls->ctx->streams[pls->pkt.stream_index]->time_base;
1918 }
1919 
1920 static int compare_ts_with_wrapdetect(int64_t ts_a, struct playlist *pls_a,
1921  int64_t ts_b, struct playlist *pls_b)
1922 {
1923  int64_t scaled_ts_a = av_rescale_q(ts_a, get_timebase(pls_a), MPEG_TIME_BASE_Q);
1924  int64_t scaled_ts_b = av_rescale_q(ts_b, get_timebase(pls_b), MPEG_TIME_BASE_Q);
1925 
1926  return av_compare_mod(scaled_ts_a, scaled_ts_b, 1LL << 33);
1927 }
1928 
1930 {
1931  HLSContext *c = s->priv_data;
1932  int ret, i, minplaylist = -1;
1933 
1935  c->first_packet = 0;
1936 
1937  for (i = 0; i < c->n_playlists; i++) {
1938  struct playlist *pls = c->playlists[i];
1939  /* Make sure we've got one buffered packet from each open playlist
1940  * stream */
1941  if (pls->needed && !pls->pkt.data) {
1942  while (1) {
1943  int64_t ts_diff;
1944  AVRational tb;
1945  ret = av_read_frame(pls->ctx, &pls->pkt);
1946  if (ret < 0) {
1947  if (!avio_feof(&pls->pb) && ret != AVERROR_EOF)
1948  return ret;
1949  reset_packet(&pls->pkt);
1950  break;
1951  } else {
1952  /* stream_index check prevents matching picture attachments etc. */
1953  if (pls->is_id3_timestamped && pls->pkt.stream_index == 0) {
1954  /* audio elementary streams are id3 timestamped */
1956  }
1957 
1958  if (c->first_timestamp == AV_NOPTS_VALUE &&
1959  pls->pkt.dts != AV_NOPTS_VALUE)
1960  c->first_timestamp = av_rescale_q(pls->pkt.dts,
1962  }
1963 
1964  if (pls->seek_timestamp == AV_NOPTS_VALUE)
1965  break;
1966 
1967  if (pls->seek_stream_index < 0 ||
1968  pls->seek_stream_index == pls->pkt.stream_index) {
1969 
1970  if (pls->pkt.dts == AV_NOPTS_VALUE) {
1972  break;
1973  }
1974 
1975  tb = get_timebase(pls);
1976  ts_diff = av_rescale_rnd(pls->pkt.dts, AV_TIME_BASE,
1977  tb.den, AV_ROUND_DOWN) -
1978  pls->seek_timestamp;
1979  if (ts_diff >= 0 && (pls->seek_flags & AVSEEK_FLAG_ANY ||
1980  pls->pkt.flags & AV_PKT_FLAG_KEY)) {
1982  break;
1983  }
1984  }
1985  av_packet_unref(&pls->pkt);
1986  reset_packet(&pls->pkt);
1987  }
1988  }
1989  /* Check if this stream has the packet with the lowest dts */
1990  if (pls->pkt.data) {
1991  struct playlist *minpls = minplaylist < 0 ?
1992  NULL : c->playlists[minplaylist];
1993  if (minplaylist < 0) {
1994  minplaylist = i;
1995  } else {
1996  int64_t dts = pls->pkt.dts;
1997  int64_t mindts = minpls->pkt.dts;
1998 
1999  if (dts == AV_NOPTS_VALUE ||
2000  (mindts != AV_NOPTS_VALUE && compare_ts_with_wrapdetect(dts, pls, mindts, minpls) < 0))
2001  minplaylist = i;
2002  }
2003  }
2004  }
2005 
2006  /* If we got a packet, return it */
2007  if (minplaylist >= 0) {
2008  struct playlist *pls = c->playlists[minplaylist];
2009  AVStream *ist;
2010  AVStream *st;
2011 
2012  ret = update_streams_from_subdemuxer(s, pls);
2013  if (ret < 0) {
2014  av_packet_unref(&pls->pkt);
2015  reset_packet(&pls->pkt);
2016  return ret;
2017  }
2018 
2019  /* check if noheader flag has been cleared by the subdemuxer */
2020  if (pls->has_noheader_flag && !(pls->ctx->ctx_flags & AVFMTCTX_NOHEADER)) {
2021  pls->has_noheader_flag = 0;
2023  }
2024 
2025  if (pls->pkt.stream_index >= pls->n_main_streams) {
2026  av_log(s, AV_LOG_ERROR, "stream index inconsistency: index %d, %d main streams, %d subdemuxer streams\n",
2027  pls->pkt.stream_index, pls->n_main_streams, pls->ctx->nb_streams);
2028  av_packet_unref(&pls->pkt);
2029  reset_packet(&pls->pkt);
2030  return AVERROR_BUG;
2031  }
2032 
2033  ist = pls->ctx->streams[pls->pkt.stream_index];
2034  st = pls->main_streams[pls->pkt.stream_index];
2035 
2036  *pkt = pls->pkt;
2037  pkt->stream_index = st->index;
2038  reset_packet(&c->playlists[minplaylist]->pkt);
2039 
2040  if (pkt->dts != AV_NOPTS_VALUE)
2041  c->cur_timestamp = av_rescale_q(pkt->dts,
2042  ist->time_base,
2043  AV_TIME_BASE_Q);
2044 
2045  /* There may be more situations where this would be useful, but this at least
2046  * handles newly probed codecs properly (i.e. request_probe by mpegts). */
2047  if (ist->codecpar->codec_id != st->codecpar->codec_id) {
2048  ret = set_stream_info_from_input_stream(st, pls, ist);
2049  if (ret < 0) {
2050  av_packet_unref(pkt);
2051  return ret;
2052  }
2053  }
2054 
2055  return 0;
2056  }
2057  return AVERROR_EOF;
2058 }
2059 
2060 static int hls_read_seek(AVFormatContext *s, int stream_index,
2061  int64_t timestamp, int flags)
2062 {
2063  HLSContext *c = s->priv_data;
2064  struct playlist *seek_pls = NULL;
2065  int i, seq_no;
2066  int j;
2067  int stream_subdemuxer_index;
2068  int64_t first_timestamp, seek_timestamp, duration;
2069 
2070  if ((flags & AVSEEK_FLAG_BYTE) ||
2071  !(c->variants[0]->playlists[0]->finished || c->variants[0]->playlists[0]->type == PLS_TYPE_EVENT))
2072  return AVERROR(ENOSYS);
2073 
2074  first_timestamp = c->first_timestamp == AV_NOPTS_VALUE ?
2075  0 : c->first_timestamp;
2076 
2077  seek_timestamp = av_rescale_rnd(timestamp, AV_TIME_BASE,
2078  s->streams[stream_index]->time_base.den,
2079  flags & AVSEEK_FLAG_BACKWARD ?
2081 
2082  duration = s->duration == AV_NOPTS_VALUE ?
2083  0 : s->duration;
2084 
2085  if (0 < duration && duration < seek_timestamp - first_timestamp)
2086  return AVERROR(EIO);
2087 
2088  /* find the playlist with the specified stream */
2089  for (i = 0; i < c->n_playlists; i++) {
2090  struct playlist *pls = c->playlists[i];
2091  for (j = 0; j < pls->n_main_streams; j++) {
2092  if (pls->main_streams[j] == s->streams[stream_index]) {
2093  seek_pls = pls;
2094  stream_subdemuxer_index = j;
2095  break;
2096  }
2097  }
2098  }
2099  /* check if the timestamp is valid for the playlist with the
2100  * specified stream index */
2101  if (!seek_pls || !find_timestamp_in_playlist(c, seek_pls, seek_timestamp, &seq_no))
2102  return AVERROR(EIO);
2103 
2104  /* set segment now so we do not need to search again below */
2105  seek_pls->cur_seq_no = seq_no;
2106  seek_pls->seek_stream_index = stream_subdemuxer_index;
2107 
2108  for (i = 0; i < c->n_playlists; i++) {
2109  /* Reset reading */
2110  struct playlist *pls = c->playlists[i];
2111  if (pls->input)
2112  ff_format_io_close(pls->parent, &pls->input);
2113  av_packet_unref(&pls->pkt);
2114  reset_packet(&pls->pkt);
2115  pls->pb.eof_reached = 0;
2116  /* Clear any buffered data */
2117  pls->pb.buf_end = pls->pb.buf_ptr = pls->pb.buffer;
2118  /* Reset the pos, to let the mpegts demuxer know we've seeked. */
2119  pls->pb.pos = 0;
2120  /* Flush the packet queue of the subdemuxer. */
2121  ff_read_frame_flush(pls->ctx);
2122 
2124  pls->seek_flags = flags;
2125 
2126  if (pls != seek_pls) {
2127  /* set closest segment seq_no for playlists not handled above */
2128  find_timestamp_in_playlist(c, pls, seek_timestamp, &pls->cur_seq_no);
2129  /* seek the playlist to the given position without taking
2130  * keyframes into account since this playlist does not have the
2131  * specified stream where we should look for the keyframes */
2132  pls->seek_stream_index = -1;
2133  pls->seek_flags |= AVSEEK_FLAG_ANY;
2134  }
2135  }
2136 
2138 
2139  return 0;
2140 }
2141 
2142 static int hls_probe(AVProbeData *p)
2143 {
2144  /* Require #EXTM3U at the start, and either one of the ones below
2145  * somewhere for a proper match. */
2146  if (strncmp(p->buf, "#EXTM3U", 7))
2147  return 0;
2148 
2149  if (strstr(p->buf, "#EXT-X-STREAM-INF:") ||
2150  strstr(p->buf, "#EXT-X-TARGETDURATION:") ||
2151  strstr(p->buf, "#EXT-X-MEDIA-SEQUENCE:"))
2152  return AVPROBE_SCORE_MAX;
2153  return 0;
2154 }
2155 
2156 #define OFFSET(x) offsetof(HLSContext, x)
2157 #define FLAGS AV_OPT_FLAG_DECODING_PARAM
2158 static const AVOption hls_options[] = {
2159  {"live_start_index", "segment index to start live streams at (negative values are from the end)",
2160  OFFSET(live_start_index), AV_OPT_TYPE_INT, {.i64 = -3}, INT_MIN, INT_MAX, FLAGS},
2161  {"allowed_extensions", "List of file extensions that hls is allowed to access",
2162  OFFSET(allowed_extensions), AV_OPT_TYPE_STRING,
2163  {.str = "3gp,aac,avi,flac,mkv,m3u8,m4a,m4s,m4v,mpg,mov,mp2,mp3,mp4,mpeg,mpegts,ogg,ogv,oga,ts,vob,wav"},
2164  INT_MIN, INT_MAX, FLAGS},
2165  {"max_reload", "Maximum number of times a insufficient list is attempted to be reloaded",
2166  OFFSET(max_reload), AV_OPT_TYPE_INT, {.i64 = 1000}, 0, INT_MAX, FLAGS},
2167  {NULL}
2168 };
2169 
2170 static const AVClass hls_class = {
2171  .class_name = "hls,applehttp",
2172  .item_name = av_default_item_name,
2173  .option = hls_options,
2174  .version = LIBAVUTIL_VERSION_INT,
2175 };
2176 
2178  .name = "hls,applehttp",
2179  .long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
2180  .priv_class = &hls_class,
2181  .priv_data_size = sizeof(HLSContext),
2182  .read_probe = hls_probe,
2185  .read_close = hls_close,
2187 };
const char * name
Definition: avisynth_c.h:775
#define FF_COMPLIANCE_EXPERIMENTAL
Allow nonstandardized experimental things.
Definition: avcodec.h:2986
#define AVSEEK_FLAG_BACKWARD
Definition: avformat.h:2423
int(* io_open)(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **options)
Definition: avformat.h:1909
uint8_t key[16]
Definition: hls.c:127
#define NULL
Definition: coverity.c:32
static int update_init_section(struct playlist *pls, struct segment *seg)
Definition: hls.c:1202
int needed
Definition: hls.c:114
struct segment * init_section
Definition: hls.c:76
void ff_make_absolute_url(char *buf, int size, const char *base, const char *rel)
Convert a relative url into an absolute url, given a base url.
Definition: url.c:80
const char * s
Definition: avisynth_c.h:768
void * data
Definition: id3v2.h:57
Bytestream IO Context.
Definition: avio.h:161
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:334
int bandwidth
Definition: hls.c:174
Definition: hls.c:92
char * headers
holds HTTP headers set as an AVOption to the HTTP protocol context
Definition: hls.c:203
char assoc_language[MAX_FIELD_LEN]
Definition: hls.c:453
int strict_std_compliance
Definition: hls.c:206
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1605
AVDictionary * id3_initial
Definition: hls.c:136
AVOption.
Definition: opt.h:246
ReadFromURLMode
Definition: dashdec.c:1270
static int set_stream_info_from_input_stream(AVStream *st, struct playlist *pls, AVStream *ist)
Definition: hls.c:1561
struct segment ** init_sections
Definition: hls.c:155
static void handle_init_section_args(struct init_section_info *info, const char *key, int key_len, char **dest, int *dest_len)
Definition: hls.c:436
static int read_from_url(struct playlist *pls, struct segment *seg, uint8_t *buf, int buf_size, enum ReadFromURLMode mode)
Definition: hls.c:886
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
unsigned int id3_buf_size
Definition: hls.c:135
ID3v2ExtraMeta * id3_deferred_extra
Definition: hls.c:139
#define LIBAVUTIL_VERSION_INT
Definition: version.h:86
unsigned char * buf_ptr
Current position in the buffer.
Definition: avio.h:228
unsigned char * buf_end
End of the data, may be less than buffer+buffer_size if the read function returned less data than req...
Definition: avio.h:229
#define AV_RB64
Definition: intreadwrite.h:164
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4756
int ff_copy_whiteblacklists(AVFormatContext *dst, const AVFormatContext *src)
Copies the whilelists from one context to the other.
Definition: utils.c:145
#define AVSEEK_FLAG_ANY
seek to any frame, even non-keyframes
Definition: avformat.h:2425
char forced[4]
Definition: hls.c:456
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
static struct rendition * new_rendition(HLSContext *c, struct rendition_info *info, const char *url_base)
Definition: hls.c:460
static int64_t default_reload_interval(struct playlist *pls)
Definition: hls.c:1259
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:4152
int disposition
Definition: hls.c:170
unsigned int init_sec_data_len
Definition: hls.c:123
int num
Numerator.
Definition: rational.h:59
int index
stream index in AVFormatContext
Definition: avformat.h:890
int size
Definition: avcodec.h:1680
#define ID3v2_DEFAULT_MAGIC
Default magic bytes for ID3v2 header: "ID3".
Definition: id3v2.h:35
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:244
#define AVIO_FLAG_READ
read-only
Definition: avio.h:660
char language[MAX_FIELD_LEN]
Definition: hls.c:452
static av_const int av_isspace(int c)
Locale-independent conversion of ASCII isspace.
Definition: avstring.h:222
static int open_input(HLSContext *c, struct playlist *pls, struct segment *seg)
Definition: hls.c:1106
unsigned char * buffer
Start of the buffer.
Definition: avio.h:226
int has_noheader_flag
Definition: hls.c:101
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:217
#define AV_DISPOSITION_HEARING_IMPAIRED
stream for hearing impaired audiences
Definition: avformat.h:849
static void fill_buf(uint8_t *data, int w, int h, int linesize, uint8_t v)
char * key
Definition: hls.c:72
int av_usleep(unsigned usec)
Sleep for a period of time.
Definition: time.c:84
discard all
Definition: avcodec.h:830
static AVPacket pkt
static void handle_rendition_args(struct rendition_info *info, const char *key, int key_len, char **dest, int *dest_len)
Definition: hls.c:538
#define MAX_CHARACTERISTICS_LEN
Definition: hls.c:44
int ctx_flags
Flags signalling stream properties.
Definition: avformat.h:1398
#define src
Definition: vp8dsp.c:254
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:1149
static void reset_packet(AVPacket *pkt)
Definition: hls.c:298
int strict_std_compliance
Allow non-standard and experimental extension.
Definition: avformat.h:1635
char * url
Definition: hls.c:71
int64_t url_offset
Definition: hls.c:69
static int id3_has_changed_values(struct playlist *pls, AVDictionary *metadata, ID3v2ExtraMetaAPIC *apic)
Definition: hls.c:936
Format I/O context.
Definition: avformat.h:1349
#define MAX_URL_SIZE
Definition: internal.h:30
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
char method[11]
Definition: hls.c:375
void ff_read_frame_flush(AVFormatContext *s)
Flush the frame reader.
Definition: utils.c:1873
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
unsigned int init_sec_buf_read_offset
Definition: hls.c:124
Public dictionary API.
char type[16]
Definition: hls.c:449
int n_renditions
Definition: hls.c:192
#define ID3v2_HEADER_SIZE
Definition: id3v2.h:30
#define MPEG_TIME_BASE_Q
Definition: hls.c:47
enum AVMediaType type
Definition: hls.c:165
uint8_t iv[16]
Definition: hls.c:74
char defaultr[4]
Definition: hls.c:455
uint8_t
Round toward +infinity.
Definition: mathematics.h:83
int n_variants
Definition: hls.c:188
#define FLAGS
Definition: hls.c:2157
#define av_malloc(s)
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1302
AVOptions.
char group_id[MAX_FIELD_LEN]
Definition: hls.c:451
int64_t cur_seg_offset
Definition: hls.c:116
char audio[MAX_FIELD_LEN]
Definition: hls.c:324
static void free_rendition_list(HLSContext *c)
Definition: hls.c:285
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1697
int id
Format-specific stream ID.
Definition: avformat.h:896
uint8_t * read_buffer
Definition: hls.c:95
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5468
char url[MAX_URL_SIZE]
Definition: hls.c:93
static void intercept_id3(struct playlist *pls, uint8_t *buf, int buf_size, int *len)
Definition: hls.c:1006
static struct playlist * new_playlist(HLSContext *c, const char *url, const char *base)
Definition: hls.c:304
AVInputFormat ff_hls_demuxer
Definition: hls.c:2177
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4383
int finished
Definition: hls.c:108
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1417
static void handle_id3(AVIOContext *pb, struct playlist *pls)
Definition: hls.c:965
int n_playlists
Definition: hls.c:190
AVFormatContext * avformat_alloc_context(void)
Allocate an AVFormatContext.
Definition: options.c:144
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:40
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1460
uint8_t * data
Definition: avcodec.h:1679
AVProgram * av_new_program(AVFormatContext *s, int id)
Definition: utils.c:4482
static int read_data(void *opaque, uint8_t *buf, int buf_size)
Definition: hls.c:1266
static int flags
Definition: log.c:57
#define AVERROR_EOF
End of file.
Definition: error.h:55
unsigned int init_sec_buf_size
Definition: hls.c:122
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
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:85
struct rendition ** renditions
Definition: hls.c:150
static void add_metadata_from_renditions(AVFormatContext *s, struct playlist *pls, enum AVMediaType type)
Definition: hls.c:1406
#define av_log(a,...)
static void free_playlist_list(HLSContext *c)
Definition: hls.c:242
struct rendition ** renditions
Definition: hls.c:193
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:636
char * http_proxy
holds the address of the HTTP proxy server
Definition: hls.c:204
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1711
struct variant ** variants
Definition: hls.c:189
static AVRational get_timebase(struct playlist *pls)
Definition: hls.c:1912
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
Callback for checking whether to abort blocking functions.
Definition: avio.h:58
int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt, const char *url, void *logctx, unsigned int offset, unsigned int max_probe_size)
Like av_probe_input_buffer2() but returns 0 on success.
Definition: format.c:364
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
Definition: utils.c:2346
AVStream ** main_streams
Definition: hls.c:105
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:1920
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define AV_DICT_MATCH_CASE
Only get an entry with exact-case key match.
Definition: dict.h:69
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1567
char video_group[MAX_FIELD_LEN]
Definition: hls.c:181
int64_t cur_timestamp
Definition: hls.c:199
int n_renditions
Definition: hls.c:149
static const AVClass hls_class
Definition: hls.c:2170
AVIOInterruptCB * interrupt_callback
Definition: hls.c:200
char bandwidth[20]
Definition: hls.c:322
static void handle_key_args(struct key_info *info, const char *key, int key_len, char **dest, int *dest_len)
Definition: hls.c:379
av_default_item_name
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:181
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
char byterange[32]
Definition: hls.c:396
int64_t id3_mpegts_timestamp
Definition: hls.c:132
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:203
static void free_segment_list(struct playlist *pls)
Definition: hls.c:219
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:4148
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1133
Definition: graph2dot.c:48
simple assert() macros that are a bit more flexible than ISO C assert().
static int update_streams_from_subdemuxer(AVFormatContext *s, struct playlist *pls)
Definition: hls.c:1580
int first_packet
Definition: hls.c:197
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:222
static int find_timestamp_in_playlist(HLSContext *c, struct playlist *pls, int64_t timestamp, int *seq_no)
Definition: hls.c:1438
uint8_t * data
Definition: id3v2.h:78
int64_t id3_offset
Definition: hls.c:133
int is_id3_timestamped
Definition: hls.c:131
New fields can be added to the end with minor version bumps.
Definition: avformat.h:1276
#define FFMAX(a, b)
Definition: common.h:94
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:83
#define fail()
Definition: checkasm.h:109
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1685
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:481
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:463
int live_start_index
Definition: hls.c:196
Definition: hls.c:67
#define AV_DISPOSITION_FORCED
Track should be used during playback by default.
Definition: avformat.h:848
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1405
AVDictionary * opts
Definition: movenc.c:50
char group_id[MAX_FIELD_LEN]
Definition: hls.c:167
static struct segment * current_segment(struct playlist *pls)
Definition: hls.c:876
int n_main_streams
Definition: hls.c:106
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:261
#define dynarray_add(tab, nb_ptr, elem)
Definition: internal.h:202
char filename[1024]
input or output filename
Definition: avformat.h:1425
static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **opts)
Definition: hls.c:1525
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:254
void av_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
#define FFMIN(a, b)
Definition: common.h:96
void(* ff_parse_key_val_cb)(void *context, const char *key, int key_len, char **dest, int *dest_len)
Callback function type for ff_parse_key_value.
Definition: internal.h:318
#define AV_OPT_SEARCH_CHILDREN
Search in possible children of the given object first.
Definition: opt.h:557
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that&#39;s been allocated with av_malloc() or another memory allocation functio...
Definition: dict.h:76
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
char * allowed_extensions
Definition: hls.c:207
int index
Definition: hls.c:98
static void add_renditions_to_variant(HLSContext *c, struct variant *var, enum AVMediaType type, const char *group_id)
Definition: hls.c:1382
uint8_t * init_sec_buf
Definition: hls.c:121
static int hls_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: hls.c:1929
uint8_t * id3_buf
Definition: hls.c:134
Definition: hls.c:373
static struct segment * new_init_section(struct playlist *pls, struct init_section_info *info, const char *url_base)
Definition: hls.c:399
void * av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)
Reallocate the given buffer if it is not large enough, otherwise do nothing.
Definition: mem.c:462
AVDictionary * metadata
Definition: avformat.h:961
static struct variant * new_variant(HLSContext *c, struct variant_info *info, const char *url, const char *base)
Definition: hls.c:329
#define AVFMT_FLAG_CUSTOM_IO
The caller has supplied a custom AVIOContext, don&#39;t avio_close() it.
Definition: avformat.h:1468
int ff_get_line(AVIOContext *s, char *buf, int maxlen)
Read a whole line of text from AVIOContext.
Definition: aviobuf.c:797
Usually treated as AVMEDIA_TYPE_DATA.
Definition: avutil.h:200
static void fill_timing_for_id3_timestamped_stream(struct playlist *pls)
Definition: hls.c:1887
struct segment ** segments
Definition: hls.c:113
#define AVERROR_EXIT
Immediate exit was requested; the called function should not be restarted.
Definition: error.h:56
char * cookies
holds HTTP cookie values set in either the initial response or as an AVOption to the HTTP protocol co...
Definition: hls.c:202
int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding rnd)
Rescale a 64-bit integer with specified rounding.
Definition: mathematics.c:58
AVPacket pkt
Definition: hls.c:100
if(ret< 0)
Definition: vf_mcdeint.c:279
uint8_t * owner
Definition: id3v2.h:77
char subtitles_group[MAX_FIELD_LEN]
Definition: hls.c:182
char name[MAX_FIELD_LEN]
Definition: hls.c:454
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:528
#define AV_DISPOSITION_VISUAL_IMPAIRED
stream for visual impaired audiences
Definition: avformat.h:850
int64_t size
Definition: hls.c:70
enum KeyType key_type
Definition: hls.c:73
static void update_options(char **dest, const char *name, void *src)
Definition: hls.c:592
Stream structure.
Definition: avformat.h:889
int id3_changed
Definition: hls.c:138
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
int avformat_queue_attached_pictures(AVFormatContext *s)
Definition: utils.c:456
AVFormatContext * parent
Definition: hls.c:97
AVFormatContext * ctx
Definition: hls.c:187
static int read_chomp_line(AVIOContext *s, char *buf, int maxlen)
Definition: hls.c:211
static void parse_id3(AVFormatContext *s, AVIOContext *pb, AVDictionary **metadata, int64_t *dts, ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta **extra_meta)
Definition: hls.c:910
#define AV_DISPOSITION_DEFAULT
Definition: avformat.h:836
int64_t first_timestamp
Definition: hls.c:198
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:237
char subtitles[MAX_FIELD_LEN]
Definition: hls.c:326
AVStreamInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1241
struct ID3v2ExtraMeta * next
Definition: id3v2.h:58
int ff_check_interrupt(AVIOInterruptCB *cb)
Check if the user has requested to interrupt a blocking function associated with cb.
Definition: avio.c:663
enum PlaylistType type
Definition: hls.c:109
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
char * user_agent
holds HTTP user agent set as an AVOption to the HTTP protocol context
Definition: hls.c:201
AVIOContext * pb
I/O context.
Definition: avformat.h:1391
static int parse_playlist(HLSContext *c, const char *url, struct playlist *pls, AVIOContext *in)
Definition: hls.c:667
int n_init_sections
Definition: hls.c:154
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:618
uint8_t * data
The data buffer.
Definition: buffer.h:89
static const AVOption hls_options[]
Definition: hls.c:2158
static int hls_read_header(AVFormatContext *s)
Definition: hls.c:1639
void * buf
Definition: avisynth_c.h:690
int max_reload
Definition: hls.c:208
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:70
struct playlist ** playlists
Definition: hls.c:191
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:50
int64_t last_load_time
Definition: hls.c:117
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) #define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac) { } void ff_audio_convert_free(AudioConvert **ac) { if(! *ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);} AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map) { AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method !=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt) > 2) { ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc) { av_free(ac);return NULL;} return ac;} in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar) { ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar ? ac->channels :1;} else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);return ac;} int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in) { int use_generic=1;int len=in->nb_samples;int p;if(ac->dc) { av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (dithered)\", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
Describe the class of an AVClass context structure.
Definition: log.h:67
static void update_noheader_flag(AVFormatContext *s)
Definition: hls.c:1605
#define AV_WB32(p, v)
Definition: intreadwrite.h:424
AVIOContext * input
Definition: hls.c:96
Rational number (pair of numerator and denominator).
Definition: rational.h:58
int cur_needed
Definition: hls.c:114
struct segment * cur_init_section
Definition: hls.c:120
int seek_stream_index
Definition: hls.c:143
PlaylistType
Definition: hls.c:81
int64_t target_duration
Definition: hls.c:110
static int save_avio_options(AVFormatContext *s)
Definition: hls.c:1503
#define AV_OPT_ALLOW_NULL
In av_opt_get, return NULL if the option has a pointer type and is set to NULL, rather than returning...
Definition: opt.h:572
#define AVSEEK_FLAG_BYTE
seeking based on position in bytes
Definition: avformat.h:2424
int need_context_update
Whether the internal avctx needs to be updated from codecpar (after a late change to codecpar) ...
Definition: internal.h:198
static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url, AVDictionary *opts, AVDictionary *opts2, int *is_http)
Definition: hls.c:600
char uri[MAX_URL_SIZE]
Definition: hls.c:450
AVMediaType
Definition: avutil.h:199
int n_playlists
Definition: hls.c:177
struct playlist * playlist
Definition: hls.c:166
static void add_stream_to_programs(AVFormatContext *s, struct playlist *pls, AVStream *stream)
Definition: hls.c:1535
#define MPEG_TIME_BASE
Definition: hls.c:46
#define snprintf
Definition: snprintf.h:34
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:4318
#define u(width,...)
This structure contains the data a format has to probe a file.
Definition: avformat.h:461
int ff_hex_to_data(uint8_t *data, const char *p)
Parse a string of hexadecimal strings.
Definition: utils.c:4728
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1724
Definition: hls.c:164
Round toward -infinity.
Definition: mathematics.h:82
static void handle_variant_args(struct variant_info *info, const char *key, int key_len, char **dest, int *dest_len)
Definition: hls.c:355
const char * avio_find_protocol_name(const char *url)
Return the name of the protocol that will handle the passed URL.
Definition: avio.c:474
int size
Size of data in bytes.
Definition: buffer.h:93
AVDictionary * metadata
Definition: avformat.h:1282
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
char audio_group[MAX_FIELD_LEN]
Definition: hls.c:180
int64_t av_gettime_relative(void)
Get the current time in microseconds since some unspecified starting point.
Definition: time.c:56
KeyType
Definition: hls.c:61
static int recheck_discard_flags(AVFormatContext *s, int first)
Definition: hls.c:1847
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:4786
int64_t seek_timestamp
Definition: hls.c:141
char iv[35]
Definition: hls.c:376
#define OFFSET(x)
Definition: hls.c:2156
char characteristics[MAX_CHARACTERISTICS_LEN]
Definition: hls.c:457
int seek_flags
Definition: hls.c:142
char * av_strtok(char *s, const char *delim, char **saveptr)
Split the string into several tokens which can be accessed by successive calls to av_strtok()...
Definition: avstring.c:184
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:473
int av_strstart(const char *str, const char *pfx, const char **ptr)
Return non-zero if pfx is a prefix of str.
Definition: avstring.c:34
char language[MAX_FIELD_LEN]
Definition: hls.c:168
AVIOContext pb
Definition: hls.c:94
Main libavformat public API header.
char uri[MAX_URL_SIZE]
Definition: hls.c:374
#define INITIAL_BUFFER_SIZE
Definition: hls.c:41
int ff_id3v2_match(const uint8_t *buf, const char *magic)
Detect ID3v2 Header.
Definition: id3v2.c:141
int ffio_init_context(AVIOContext *s, unsigned char *buffer, int buffer_size, int write_flag, void *opaque, int(*read_packet)(void *opaque, uint8_t *buf, int buf_size), int(*write_packet)(void *opaque, uint8_t *buf, int buf_size), int64_t(*seek)(void *opaque, int64_t offset, int whence))
Definition: aviobuf.c:81
#define MAX_FIELD_LEN
Definition: hls.c:43
int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
Read packets of a media file to get stream information.
Definition: utils.c:3514
const char * tag
Definition: id3v2.h:56
static double c[64]
int cur_seq_no
Definition: hls.c:195
int av_dict_set_int(AVDictionary **pm, const char *key, int64_t value, int flags)
Convenience wrapper for av_dict_set that converts the value to a string and stores it...
Definition: dict.c:147
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:950
int64_t pos
position in the file of the current buffer
Definition: avio.h:238
int pts_wrap_bits
number of bits in pts (used for wrapping control)
Definition: avformat.h:1055
AVDictionary * avio_opts
Definition: hls.c:205
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:33
char * key
Definition: dict.h:86
int n_segments
Definition: hls.c:112
int den
Denominator.
Definition: rational.h:60
void avformat_close_input(AVFormatContext **s)
Close an opened input AVFormatContext.
Definition: utils.c:4355
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:777
static int hls_probe(AVProbeData *p)
Definition: hls.c:2142
static int ensure_playlist(HLSContext *c, struct playlist **pls, const char *url)
Definition: hls.c:582
static int hls_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: hls.c:2060
static av_always_inline int diff(const uint32_t a, const uint32_t b)
int av_opt_get(void *obj, const char *name, int search_flags, uint8_t **out_val)
Definition: opt.c:751
#define av_free(p)
int id3_found
Definition: hls.c:137
char name[MAX_FIELD_LEN]
Definition: hls.c:169
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:1121
char * value
Definition: dict.h:87
int eof_reached
true if eof reached
Definition: avio.h:240
int len
int ff_id3v2_tag_len(const uint8_t *buf)
Get the length of an ID3v2 tag.
Definition: id3v2.c:154
void * priv_data
Format private data.
Definition: avformat.h:1377
AVBufferRef * buf
Definition: id3v2.h:70
AVFormatContext * ctx
Definition: hls.c:99
uint32_t datasize
Definition: id3v2.h:79
int avformat_open_input(AVFormatContext **ps, const char *url, AVInputFormat *fmt, AVDictionary **options)
Open an input stream and read the header.
Definition: utils.c:513
struct playlist ** playlists
Definition: hls.c:178
Definition: hls.c:173
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1678
char video[MAX_FIELD_LEN]
Definition: hls.c:325
int64_t duration
Duration of the stream, in AV_TIME_BASE fractional seconds.
Definition: avformat.h:1444
#define av_freep(p)
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:664
#define AV_DICT_IGNORE_SUFFIX
Return first entry in a dictionary whose first part corresponds to the search key, ignoring the suffix of the found key string.
Definition: dict.h:70
char uri[MAX_URL_SIZE]
Definition: hls.c:395
AVCodecParameters * codecpar
Definition: avformat.h:1252
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:356
int start_seq_no
Definition: hls.c:111
int stream_index
Definition: avcodec.h:1681
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:926
static void free_init_section_list(struct playlist *pls)
Definition: hls.c:231
int64_t duration
Definition: hls.c:68
static void free_variant_list(HLSContext *c)
Definition: hls.c:273
int cur_seq_no
Definition: hls.c:115
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:952
char key_url[MAX_URL_SIZE]
Definition: hls.c:126
static int hls_close(AVFormatContext *s)
Definition: hls.c:1626
char * ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase)
Definition: utils.c:4707
This structure stores compressed data.
Definition: avcodec.h:1656
mode
Use these values in ebur128_init (or&#39;ed).
Definition: ebur128.h:83
Definition: hls.c:62
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1672
for(j=16;j >0;--j)
AVPacket attached_pic
For streams with AV_DISPOSITION_ATTACHED_PIC disposition, this packet will contain the attached pictu...
Definition: avformat.h:979
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
#define tb
Definition: regdef.h:68
static av_cold void cleanup(FlashSV2Context *s)
Definition: flashsv2enc.c:127
int64_t av_compare_mod(uint64_t a, uint64_t b, uint64_t mod)
Compare the remainders of two integer operands divided by a common divisor.
Definition: mathematics.c:160
static int select_cur_seq_no(HLSContext *c, struct playlist *pls)
Definition: hls.c:1464
static uint8_t tmp[11]
Definition: aes_ctr.c:26