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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 "url.h"
40 #include "id3v2.h"
41 
42 #define INITIAL_BUFFER_SIZE 32768
43 
44 #define MAX_FIELD_LEN 64
45 #define MAX_CHARACTERISTICS_LEN 512
46 
47 #define MPEG_TIME_BASE 90000
48 #define MPEG_TIME_BASE_Q (AVRational){1, MPEG_TIME_BASE}
49 
50 /*
51  * An apple http stream consists of a playlist with media segment files,
52  * played sequentially. There may be several playlists with the same
53  * video content, in different bandwidth variants, that are played in
54  * parallel (preferably only one bandwidth variant at a time). In this case,
55  * the user supplied the url to a main playlist that only lists the variant
56  * playlists.
57  *
58  * If the main playlist doesn't point at any variants, we still create
59  * one anonymous toplevel variant for this, to maintain the structure.
60  */
61 
62 enum KeyType {
66 };
67 
68 struct segment {
69  int64_t duration;
70  int64_t url_offset;
71  int64_t size;
72  char *url;
73  char *key;
75  uint8_t iv[16];
76  /* associated Media Initialization Section, treated as a segment */
78 };
79 
80 struct rendition;
81 
86 };
87 
88 /*
89  * Each playlist has its own demuxer. If it currently is active,
90  * it has an open AVIOContext too, and potentially an AVPacket
91  * containing the next packet from this stream.
92  */
93 struct playlist {
99  int index;
103 
104  int finished;
109  struct segment **segments;
112  int64_t cur_seg_offset;
113  int64_t last_load_time;
114 
115  /* Currently active Media Initialization Section */
118  unsigned int init_sec_buf_size;
119  unsigned int init_sec_data_len;
121 
124 
125  /* ID3 timestamp handling (elementary audio streams have ID3 timestamps
126  * (and possibly other ID3 tags) in the beginning of each segment) */
127  int is_id3_timestamped; /* -1: not yet known */
128  int64_t id3_mpegts_timestamp; /* in mpegts tb */
129  int64_t id3_offset; /* in stream original tb */
130  uint8_t* id3_buf; /* temp buffer for id3 parsing */
131  unsigned int id3_buf_size;
132  AVDictionary *id3_initial; /* data from first id3 tag */
133  int id3_found; /* ID3 tag found at some point */
134  int id3_changed; /* ID3 tag data has changed at some point */
135  ID3v2ExtraMeta *id3_deferred_extra; /* stored here until subdemuxer is opened */
136 
137  int64_t seek_timestamp;
139  int seek_stream_index; /* into subdemuxer stream array */
140 
141  /* Renditions associated with this playlist, if any.
142  * Alternative rendition playlists have a single rendition associated
143  * with them, and variant main Media Playlists may have
144  * multiple (playlist-less) renditions associated with them. */
147 
148  /* Media Initialization Sections (EXT-X-MAP) associated with this
149  * playlist, if any. */
152 };
153 
154 /*
155  * Renditions are e.g. alternative subtitle or audio streams.
156  * The rendition may either be an external playlist or it may be
157  * contained in the main Media Playlist of the variant (in which case
158  * playlist is NULL).
159  */
160 struct rendition {
167 };
168 
169 struct variant {
171 
172  /* every variant contains at least the main Media Playlist in index 0 */
174  struct playlist **playlists;
175 
179 };
180 
181 typedef struct HLSContext {
182  AVClass *class;
184  struct variant **variants;
186  struct playlist **playlists;
189 
194  int64_t cur_timestamp;
196  char *user_agent; ///< holds HTTP user agent set as an AVOption to the HTTP protocol context
197  char *cookies; ///< holds HTTP cookie values set in either the initial response or as an AVOption to the HTTP protocol context
198  char *headers; ///< holds HTTP headers set as an AVOption to the HTTP protocol context
202 } HLSContext;
203 
204 static int read_chomp_line(AVIOContext *s, char *buf, int maxlen)
205 {
206  int len = ff_get_line(s, buf, maxlen);
207  while (len > 0 && av_isspace(buf[len - 1]))
208  buf[--len] = '\0';
209  return len;
210 }
211 
212 static void free_segment_list(struct playlist *pls)
213 {
214  int i;
215  for (i = 0; i < pls->n_segments; i++) {
216  av_freep(&pls->segments[i]->key);
217  av_freep(&pls->segments[i]->url);
218  av_freep(&pls->segments[i]);
219  }
220  av_freep(&pls->segments);
221  pls->n_segments = 0;
222 }
223 
224 static void free_init_section_list(struct playlist *pls)
225 {
226  int i;
227  for (i = 0; i < pls->n_init_sections; i++) {
228  av_freep(&pls->init_sections[i]->url);
229  av_freep(&pls->init_sections[i]);
230  }
231  av_freep(&pls->init_sections);
232  pls->n_init_sections = 0;
233 }
234 
236 {
237  int i;
238  for (i = 0; i < c->n_playlists; i++) {
239  struct playlist *pls = c->playlists[i];
240  free_segment_list(pls);
242  av_freep(&pls->renditions);
243  av_freep(&pls->id3_buf);
244  av_dict_free(&pls->id3_initial);
246  av_freep(&pls->init_sec_buf);
247  av_free_packet(&pls->pkt);
248  av_freep(&pls->pb.buffer);
249  if (pls->input)
250  ffurl_close(pls->input);
251  if (pls->ctx) {
252  pls->ctx->pb = NULL;
253  avformat_close_input(&pls->ctx);
254  }
255  av_free(pls);
256  }
257  av_freep(&c->playlists);
258  av_freep(&c->cookies);
259  av_freep(&c->user_agent);
260  c->n_playlists = 0;
261 }
262 
264 {
265  int i;
266  for (i = 0; i < c->n_variants; i++) {
267  struct variant *var = c->variants[i];
268  av_freep(&var->playlists);
269  av_free(var);
270  }
271  av_freep(&c->variants);
272  c->n_variants = 0;
273 }
274 
276 {
277  int i;
278  for (i = 0; i < c->n_renditions; i++)
279  av_freep(&c->renditions[i]);
280  av_freep(&c->renditions);
281  c->n_renditions = 0;
282 }
283 
284 /*
285  * Used to reset a statically allocated AVPacket to a clean slate,
286  * containing no data.
287  */
288 static void reset_packet(AVPacket *pkt)
289 {
290  av_init_packet(pkt);
291  pkt->data = NULL;
292 }
293 
294 static struct playlist *new_playlist(HLSContext *c, const char *url,
295  const char *base)
296 {
297  struct playlist *pls = av_mallocz(sizeof(struct playlist));
298  if (!pls)
299  return NULL;
300  reset_packet(&pls->pkt);
301  ff_make_absolute_url(pls->url, sizeof(pls->url), base, url);
303 
304  pls->is_id3_timestamped = -1;
306 
307  dynarray_add(&c->playlists, &c->n_playlists, pls);
308  return pls;
309 }
310 
311 struct variant_info {
312  char bandwidth[20];
313  /* variant group ids: */
317 };
318 
319 static struct variant *new_variant(HLSContext *c, struct variant_info *info,
320  const char *url, const char *base)
321 {
322  struct variant *var;
323  struct playlist *pls;
324 
325  pls = new_playlist(c, url, base);
326  if (!pls)
327  return NULL;
328 
329  var = av_mallocz(sizeof(struct variant));
330  if (!var)
331  return NULL;
332 
333  if (info) {
334  var->bandwidth = atoi(info->bandwidth);
335  strcpy(var->audio_group, info->audio);
336  strcpy(var->video_group, info->video);
337  strcpy(var->subtitles_group, info->subtitles);
338  }
339 
340  dynarray_add(&c->variants, &c->n_variants, var);
341  dynarray_add(&var->playlists, &var->n_playlists, pls);
342  return var;
343 }
344 
345 static void handle_variant_args(struct variant_info *info, const char *key,
346  int key_len, char **dest, int *dest_len)
347 {
348  if (!strncmp(key, "BANDWIDTH=", key_len)) {
349  *dest = info->bandwidth;
350  *dest_len = sizeof(info->bandwidth);
351  } else if (!strncmp(key, "AUDIO=", key_len)) {
352  *dest = info->audio;
353  *dest_len = sizeof(info->audio);
354  } else if (!strncmp(key, "VIDEO=", key_len)) {
355  *dest = info->video;
356  *dest_len = sizeof(info->video);
357  } else if (!strncmp(key, "SUBTITLES=", key_len)) {
358  *dest = info->subtitles;
359  *dest_len = sizeof(info->subtitles);
360  }
361 }
362 
363 struct key_info {
365  char method[11];
366  char iv[35];
367 };
368 
369 static void handle_key_args(struct key_info *info, const char *key,
370  int key_len, char **dest, int *dest_len)
371 {
372  if (!strncmp(key, "METHOD=", key_len)) {
373  *dest = info->method;
374  *dest_len = sizeof(info->method);
375  } else if (!strncmp(key, "URI=", key_len)) {
376  *dest = info->uri;
377  *dest_len = sizeof(info->uri);
378  } else if (!strncmp(key, "IV=", key_len)) {
379  *dest = info->iv;
380  *dest_len = sizeof(info->iv);
381  }
382 }
383 
386  char byterange[32];
387 };
388 
389 static struct segment *new_init_section(struct playlist *pls,
390  struct init_section_info *info,
391  const char *url_base)
392 {
393  struct segment *sec;
394  char *ptr;
395  char tmp_str[MAX_URL_SIZE];
396 
397  if (!info->uri[0])
398  return NULL;
399 
400  sec = av_mallocz(sizeof(*sec));
401  if (!sec)
402  return NULL;
403 
404  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url_base, info->uri);
405  sec->url = av_strdup(tmp_str);
406  if (!sec->url) {
407  av_free(sec);
408  return NULL;
409  }
410 
411  if (info->byterange[0]) {
412  sec->size = atoi(info->byterange);
413  ptr = strchr(info->byterange, '@');
414  if (ptr)
415  sec->url_offset = atoi(ptr+1);
416  } else {
417  /* the entire file is the init section */
418  sec->size = -1;
419  }
420 
421  dynarray_add(&pls->init_sections, &pls->n_init_sections, sec);
422 
423  return sec;
424 }
425 
426 static void handle_init_section_args(struct init_section_info *info, const char *key,
427  int key_len, char **dest, int *dest_len)
428 {
429  if (!strncmp(key, "URI=", key_len)) {
430  *dest = info->uri;
431  *dest_len = sizeof(info->uri);
432  } else if (!strncmp(key, "BYTERANGE=", key_len)) {
433  *dest = info->byterange;
434  *dest_len = sizeof(info->byterange);
435  }
436 }
437 
439  char type[16];
445  char defaultr[4];
446  char forced[4];
448 };
449 
450 static struct rendition *new_rendition(HLSContext *c, struct rendition_info *info,
451  const char *url_base)
452 {
453  struct rendition *rend;
455  char *characteristic;
456  char *chr_ptr;
457  char *saveptr;
458 
459  if (!strcmp(info->type, "AUDIO"))
460  type = AVMEDIA_TYPE_AUDIO;
461  else if (!strcmp(info->type, "VIDEO"))
462  type = AVMEDIA_TYPE_VIDEO;
463  else if (!strcmp(info->type, "SUBTITLES"))
464  type = AVMEDIA_TYPE_SUBTITLE;
465  else if (!strcmp(info->type, "CLOSED-CAPTIONS"))
466  /* CLOSED-CAPTIONS is ignored since we do not support CEA-608 CC in
467  * AVC SEI RBSP anyway */
468  return NULL;
469 
470  if (type == AVMEDIA_TYPE_UNKNOWN)
471  return NULL;
472 
473  /* URI is mandatory for subtitles as per spec */
474  if (type == AVMEDIA_TYPE_SUBTITLE && !info->uri[0])
475  return NULL;
476 
477  /* TODO: handle subtitles (each segment has to parsed separately) */
478  if (type == AVMEDIA_TYPE_SUBTITLE)
479  return NULL;
480 
481  rend = av_mallocz(sizeof(struct rendition));
482  if (!rend)
483  return NULL;
484 
485  dynarray_add(&c->renditions, &c->n_renditions, rend);
486 
487  rend->type = type;
488  strcpy(rend->group_id, info->group_id);
489  strcpy(rend->language, info->language);
490  strcpy(rend->name, info->name);
491 
492  /* add the playlist if this is an external rendition */
493  if (info->uri[0]) {
494  rend->playlist = new_playlist(c, info->uri, url_base);
495  if (rend->playlist)
497  &rend->playlist->n_renditions, rend);
498  }
499 
500  if (info->assoc_language[0]) {
501  int langlen = strlen(rend->language);
502  if (langlen < sizeof(rend->language) - 3) {
503  rend->language[langlen] = ',';
504  strncpy(rend->language + langlen + 1, info->assoc_language,
505  sizeof(rend->language) - langlen - 2);
506  }
507  }
508 
509  if (!strcmp(info->defaultr, "YES"))
511  if (!strcmp(info->forced, "YES"))
513 
514  chr_ptr = info->characteristics;
515  while ((characteristic = av_strtok(chr_ptr, ",", &saveptr))) {
516  if (!strcmp(characteristic, "public.accessibility.describes-music-and-sound"))
518  else if (!strcmp(characteristic, "public.accessibility.describes-video"))
520 
521  chr_ptr = NULL;
522  }
523 
524  return rend;
525 }
526 
527 static void handle_rendition_args(struct rendition_info *info, const char *key,
528  int key_len, char **dest, int *dest_len)
529 {
530  if (!strncmp(key, "TYPE=", key_len)) {
531  *dest = info->type;
532  *dest_len = sizeof(info->type);
533  } else if (!strncmp(key, "URI=", key_len)) {
534  *dest = info->uri;
535  *dest_len = sizeof(info->uri);
536  } else if (!strncmp(key, "GROUP-ID=", key_len)) {
537  *dest = info->group_id;
538  *dest_len = sizeof(info->group_id);
539  } else if (!strncmp(key, "LANGUAGE=", key_len)) {
540  *dest = info->language;
541  *dest_len = sizeof(info->language);
542  } else if (!strncmp(key, "ASSOC-LANGUAGE=", key_len)) {
543  *dest = info->assoc_language;
544  *dest_len = sizeof(info->assoc_language);
545  } else if (!strncmp(key, "NAME=", key_len)) {
546  *dest = info->name;
547  *dest_len = sizeof(info->name);
548  } else if (!strncmp(key, "DEFAULT=", key_len)) {
549  *dest = info->defaultr;
550  *dest_len = sizeof(info->defaultr);
551  } else if (!strncmp(key, "FORCED=", key_len)) {
552  *dest = info->forced;
553  *dest_len = sizeof(info->forced);
554  } else if (!strncmp(key, "CHARACTERISTICS=", key_len)) {
555  *dest = info->characteristics;
556  *dest_len = sizeof(info->characteristics);
557  }
558  /*
559  * ignored:
560  * - AUTOSELECT: client may autoselect based on e.g. system language
561  * - INSTREAM-ID: EIA-608 closed caption number ("CC1".."CC4")
562  */
563 }
564 
565 /* used by parse_playlist to allocate a new variant+playlist when the
566  * playlist is detected to be a Media Playlist (not Master Playlist)
567  * and we have no parent Master Playlist (parsing of which would have
568  * allocated the variant and playlist already)
569  * *pls == NULL => Master Playlist or parentless Media Playlist
570  * *pls != NULL => parented Media Playlist, playlist+variant allocated */
571 static int ensure_playlist(HLSContext *c, struct playlist **pls, const char *url)
572 {
573  if (*pls)
574  return 0;
575  if (!new_variant(c, NULL, url, NULL))
576  return AVERROR(ENOMEM);
577  *pls = c->playlists[c->n_playlists - 1];
578  return 0;
579 }
580 
581 static int open_in(HLSContext *c, AVIOContext **in, const char *url)
582 {
583  AVDictionary *tmp = NULL;
584  int ret;
585 
586  av_dict_copy(&tmp, c->avio_opts, 0);
587 
588  ret = avio_open2(in, url, AVIO_FLAG_READ, c->interrupt_callback, &tmp);
589 
590  av_dict_free(&tmp);
591  return ret;
592 }
593 
594 static int url_connect(struct playlist *pls, AVDictionary *opts, AVDictionary *opts2)
595 {
596  AVDictionary *tmp = NULL;
597  int ret;
598 
599  av_dict_copy(&tmp, opts, 0);
600  av_dict_copy(&tmp, opts2, 0);
601 
602  if ((ret = ffurl_connect(pls->input, &tmp)) < 0) {
603  ffurl_close(pls->input);
604  pls->input = NULL;
605  }
606 
607  av_dict_free(&tmp);
608  return ret;
609 }
610 
611 static void update_options(char **dest, const char *name, void *src)
612 {
613  av_freep(dest);
614  av_opt_get(src, name, 0, (uint8_t**)dest);
615  if (*dest && !strlen(*dest))
616  av_freep(dest);
617 }
618 
619 static int open_url(HLSContext *c, URLContext **uc, const char *url, AVDictionary *opts)
620 {
621  AVDictionary *tmp = NULL;
622  int ret;
623  const char *proto_name = avio_find_protocol_name(url);
624 
625  if (!proto_name)
626  return AVERROR_INVALIDDATA;
627 
628  // only http(s) & file are allowed
629  if (av_strstart(proto_name, "file", NULL)) {
630  if (strcmp(c->allowed_extensions, "ALL") && !av_match_ext(url, c->allowed_extensions)) {
631  av_log(c, AV_LOG_ERROR,
632  "Filename extension of \'%s\' is not a common multimedia extension, blocked for security reasons.\n"
633  "If you wish to override this adjust allowed_extensions, you can set it to \'ALL\' to allow all\n",
634  url);
635  return AVERROR_INVALIDDATA;
636  }
637  } else if (av_strstart(proto_name, "http", NULL)) {
638  ;
639  } else
640  return AVERROR_INVALIDDATA;
641 
642  if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':')
643  ;
644  else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))
645  return AVERROR_INVALIDDATA;
646 
647  av_dict_copy(&tmp, c->avio_opts, 0);
648  av_dict_copy(&tmp, opts, 0);
649 
650  ret = ffurl_open(uc, url, AVIO_FLAG_READ, c->interrupt_callback, &tmp);
651  if( ret >= 0) {
652  // update cookies on http response with setcookies.
653  URLContext *u = *uc;
654  update_options(&c->cookies, "cookies", u->priv_data);
655  av_dict_set(&opts, "cookies", c->cookies, 0);
656  }
657 
658  av_dict_free(&tmp);
659 
660  return ret;
661 }
662 
663 static int parse_playlist(HLSContext *c, const char *url,
664  struct playlist *pls, AVIOContext *in)
665 {
666  int ret = 0, is_segment = 0, is_variant = 0;
667  int64_t duration = 0;
668  enum KeyType key_type = KEY_NONE;
669  uint8_t iv[16] = "";
670  int has_iv = 0;
671  char key[MAX_URL_SIZE] = "";
672  char line[MAX_URL_SIZE];
673  const char *ptr;
674  int close_in = 0;
675  int64_t seg_offset = 0;
676  int64_t seg_size = -1;
677  uint8_t *new_url = NULL;
678  struct variant_info variant_info;
679  char tmp_str[MAX_URL_SIZE];
680  struct segment *cur_init_section = NULL;
681 
682  if (!in) {
683 #if 1
684  AVDictionary *opts = NULL;
685  close_in = 1;
686  /* Some HLS servers don't like being sent the range header */
687  av_dict_set(&opts, "seekable", "0", 0);
688 
689  // broker prior HTTP options that should be consistent across requests
690  av_dict_set(&opts, "user-agent", c->user_agent, 0);
691  av_dict_set(&opts, "cookies", c->cookies, 0);
692  av_dict_set(&opts, "headers", c->headers, 0);
693 
694  ret = avio_open2(&in, url, AVIO_FLAG_READ,
695  c->interrupt_callback, &opts);
696  av_dict_free(&opts);
697  if (ret < 0)
698  return ret;
699 #else
700  ret = open_in(c, &in, url);
701  if (ret < 0)
702  return ret;
703  close_in = 1;
704 #endif
705  }
706 
707  if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >= 0)
708  url = new_url;
709 
710  read_chomp_line(in, line, sizeof(line));
711  if (strcmp(line, "#EXTM3U")) {
712  ret = AVERROR_INVALIDDATA;
713  goto fail;
714  }
715 
716  if (pls) {
717  free_segment_list(pls);
718  pls->finished = 0;
719  pls->type = PLS_TYPE_UNSPECIFIED;
720  }
721  while (!avio_feof(in)) {
722  read_chomp_line(in, line, sizeof(line));
723  if (av_strstart(line, "#EXT-X-STREAM-INF:", &ptr)) {
724  is_variant = 1;
725  memset(&variant_info, 0, sizeof(variant_info));
727  &variant_info);
728  } else if (av_strstart(line, "#EXT-X-KEY:", &ptr)) {
729  struct key_info info = {{0}};
731  &info);
732  key_type = KEY_NONE;
733  has_iv = 0;
734  if (!strcmp(info.method, "AES-128"))
735  key_type = KEY_AES_128;
736  if (!strcmp(info.method, "SAMPLE-AES"))
737  key_type = KEY_SAMPLE_AES;
738  if (!strncmp(info.iv, "0x", 2) || !strncmp(info.iv, "0X", 2)) {
739  ff_hex_to_data(iv, info.iv + 2);
740  has_iv = 1;
741  }
742  av_strlcpy(key, info.uri, sizeof(key));
743  } else if (av_strstart(line, "#EXT-X-MEDIA:", &ptr)) {
744  struct rendition_info info = {{0}};
746  &info);
747  new_rendition(c, &info, url);
748  } else if (av_strstart(line, "#EXT-X-TARGETDURATION:", &ptr)) {
749  ret = ensure_playlist(c, &pls, url);
750  if (ret < 0)
751  goto fail;
752  pls->target_duration = atoi(ptr) * AV_TIME_BASE;
753  } else if (av_strstart(line, "#EXT-X-MEDIA-SEQUENCE:", &ptr)) {
754  ret = ensure_playlist(c, &pls, url);
755  if (ret < 0)
756  goto fail;
757  pls->start_seq_no = atoi(ptr);
758  } else if (av_strstart(line, "#EXT-X-PLAYLIST-TYPE:", &ptr)) {
759  ret = ensure_playlist(c, &pls, url);
760  if (ret < 0)
761  goto fail;
762  if (!strcmp(ptr, "EVENT"))
763  pls->type = PLS_TYPE_EVENT;
764  else if (!strcmp(ptr, "VOD"))
765  pls->type = PLS_TYPE_VOD;
766  } else if (av_strstart(line, "#EXT-X-MAP:", &ptr)) {
767  struct init_section_info info = {{0}};
768  ret = ensure_playlist(c, &pls, url);
769  if (ret < 0)
770  goto fail;
772  &info);
773  cur_init_section = new_init_section(pls, &info, url);
774  } else if (av_strstart(line, "#EXT-X-ENDLIST", &ptr)) {
775  if (pls)
776  pls->finished = 1;
777  } else if (av_strstart(line, "#EXTINF:", &ptr)) {
778  is_segment = 1;
779  duration = atof(ptr) * AV_TIME_BASE;
780  } else if (av_strstart(line, "#EXT-X-BYTERANGE:", &ptr)) {
781  seg_size = atoi(ptr);
782  ptr = strchr(ptr, '@');
783  if (ptr)
784  seg_offset = atoi(ptr+1);
785  } else if (av_strstart(line, "#", NULL)) {
786  continue;
787  } else if (line[0]) {
788  if (is_variant) {
789  if (!new_variant(c, &variant_info, line, url)) {
790  ret = AVERROR(ENOMEM);
791  goto fail;
792  }
793  is_variant = 0;
794  }
795  if (is_segment) {
796  struct segment *seg;
797  if (!pls) {
798  if (!new_variant(c, 0, url, NULL)) {
799  ret = AVERROR(ENOMEM);
800  goto fail;
801  }
802  pls = c->playlists[c->n_playlists - 1];
803  }
804  seg = av_malloc(sizeof(struct segment));
805  if (!seg) {
806  ret = AVERROR(ENOMEM);
807  goto fail;
808  }
809  seg->duration = duration;
810  seg->key_type = key_type;
811  if (has_iv) {
812  memcpy(seg->iv, iv, sizeof(iv));
813  } else {
814  int seq = pls->start_seq_no + pls->n_segments;
815  memset(seg->iv, 0, sizeof(seg->iv));
816  AV_WB32(seg->iv + 12, seq);
817  }
818 
819  if (key_type != KEY_NONE) {
820  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, key);
821  seg->key = av_strdup(tmp_str);
822  if (!seg->key) {
823  av_free(seg);
824  ret = AVERROR(ENOMEM);
825  goto fail;
826  }
827  } else {
828  seg->key = NULL;
829  }
830 
831  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, line);
832  seg->url = av_strdup(tmp_str);
833  if (!seg->url) {
834  av_free(seg->key);
835  av_free(seg);
836  ret = AVERROR(ENOMEM);
837  goto fail;
838  }
839 
840  dynarray_add(&pls->segments, &pls->n_segments, seg);
841  is_segment = 0;
842 
843  seg->size = seg_size;
844  if (seg_size >= 0) {
845  seg->url_offset = seg_offset;
846  seg_offset += seg_size;
847  seg_size = -1;
848  } else {
849  seg->url_offset = 0;
850  seg_offset = 0;
851  }
852 
853  seg->init_section = cur_init_section;
854  }
855  }
856  }
857  if (pls)
859 
860 fail:
861  av_free(new_url);
862  if (close_in)
863  avio_close(in);
864  return ret;
865 }
866 
867 static struct segment *current_segment(struct playlist *pls)
868 {
869  return pls->segments[pls->cur_seq_no - pls->start_seq_no];
870 }
871 
875 };
876 
877 /* read from URLContext, limiting read to current segment */
878 static int read_from_url(struct playlist *pls, struct segment *seg,
879  uint8_t *buf, int buf_size,
880  enum ReadFromURLMode mode)
881 {
882  int ret;
883 
884  /* limit read if the segment was only a part of a file */
885  if (seg->size >= 0)
886  buf_size = FFMIN(buf_size, seg->size - pls->cur_seg_offset);
887 
888  if (mode == READ_COMPLETE)
889  ret = ffurl_read_complete(pls->input, buf, buf_size);
890  else
891  ret = ffurl_read(pls->input, buf, buf_size);
892 
893  if (ret > 0)
894  pls->cur_seg_offset += ret;
895 
896  return ret;
897 }
898 
899 /* Parse the raw ID3 data and pass contents to caller */
901  AVDictionary **metadata, int64_t *dts,
902  ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta **extra_meta)
903 {
904  static const char id3_priv_owner_ts[] = "com.apple.streaming.transportStreamTimestamp";
905  ID3v2ExtraMeta *meta;
906 
907  ff_id3v2_read_dict(pb, metadata, ID3v2_DEFAULT_MAGIC, extra_meta);
908  for (meta = *extra_meta; meta; meta = meta->next) {
909  if (!strcmp(meta->tag, "PRIV")) {
910  ID3v2ExtraMetaPRIV *priv = meta->data;
911  if (priv->datasize == 8 && !strcmp(priv->owner, id3_priv_owner_ts)) {
912  /* 33-bit MPEG timestamp */
913  int64_t ts = AV_RB64(priv->data);
914  av_log(s, AV_LOG_DEBUG, "HLS ID3 audio timestamp %"PRId64"\n", ts);
915  if ((ts & ~((1ULL << 33) - 1)) == 0)
916  *dts = ts;
917  else
918  av_log(s, AV_LOG_ERROR, "Invalid HLS ID3 audio timestamp %"PRId64"\n", ts);
919  }
920  } else if (!strcmp(meta->tag, "APIC") && apic)
921  *apic = meta->data;
922  }
923 }
924 
925 /* Check if the ID3 metadata contents have changed */
926 static int id3_has_changed_values(struct playlist *pls, AVDictionary *metadata,
927  ID3v2ExtraMetaAPIC *apic)
928 {
929  AVDictionaryEntry *entry = NULL;
930  AVDictionaryEntry *oldentry;
931  /* check that no keys have changed values */
932  while ((entry = av_dict_get(metadata, "", entry, AV_DICT_IGNORE_SUFFIX))) {
933  oldentry = av_dict_get(pls->id3_initial, entry->key, NULL, AV_DICT_MATCH_CASE);
934  if (!oldentry || strcmp(oldentry->value, entry->value) != 0)
935  return 1;
936  }
937 
938  /* check if apic appeared */
939  if (apic && (pls->ctx->nb_streams != 2 || !pls->ctx->streams[1]->attached_pic.data))
940  return 1;
941 
942  if (apic) {
943  int size = pls->ctx->streams[1]->attached_pic.size;
944  if (size != apic->buf->size - AV_INPUT_BUFFER_PADDING_SIZE)
945  return 1;
946 
947  if (memcmp(apic->buf->data, pls->ctx->streams[1]->attached_pic.data, size) != 0)
948  return 1;
949  }
950 
951  return 0;
952 }
953 
954 /* Parse ID3 data and handle the found data */
955 static void handle_id3(AVIOContext *pb, struct playlist *pls)
956 {
957  AVDictionary *metadata = NULL;
958  ID3v2ExtraMetaAPIC *apic = NULL;
959  ID3v2ExtraMeta *extra_meta = NULL;
960  int64_t timestamp = AV_NOPTS_VALUE;
961 
962  parse_id3(pls->ctx, pb, &metadata, &timestamp, &apic, &extra_meta);
963 
964  if (timestamp != AV_NOPTS_VALUE) {
965  pls->id3_mpegts_timestamp = timestamp;
966  pls->id3_offset = 0;
967  }
968 
969  if (!pls->id3_found) {
970  /* initial ID3 tags */
972  pls->id3_found = 1;
973 
974  /* get picture attachment and set text metadata */
975  if (pls->ctx->nb_streams)
976  ff_id3v2_parse_apic(pls->ctx, &extra_meta);
977  else
978  /* demuxer not yet opened, defer picture attachment */
979  pls->id3_deferred_extra = extra_meta;
980 
981  av_dict_copy(&pls->ctx->metadata, metadata, 0);
982  pls->id3_initial = metadata;
983 
984  } else {
985  if (!pls->id3_changed && id3_has_changed_values(pls, metadata, apic)) {
986  avpriv_report_missing_feature(pls->ctx, "Changing ID3 metadata in HLS audio elementary stream");
987  pls->id3_changed = 1;
988  }
989  av_dict_free(&metadata);
990  }
991 
992  if (!pls->id3_deferred_extra)
993  ff_id3v2_free_extra_meta(&extra_meta);
994 }
995 
996 /* Intercept and handle ID3 tags between URLContext and AVIOContext */
997 static void intercept_id3(struct playlist *pls, uint8_t *buf,
998  int buf_size, int *len)
999 {
1000  /* intercept id3 tags, we do not want to pass them to the raw
1001  * demuxer on all segment switches */
1002  int bytes;
1003  int id3_buf_pos = 0;
1004  int fill_buf = 0;
1005  struct segment *seg = current_segment(pls);
1006 
1007  /* gather all the id3 tags */
1008  while (1) {
1009  /* see if we can retrieve enough data for ID3 header */
1010  if (*len < ID3v2_HEADER_SIZE && buf_size >= ID3v2_HEADER_SIZE) {
1011  bytes = read_from_url(pls, seg, buf + *len, ID3v2_HEADER_SIZE - *len, READ_COMPLETE);
1012  if (bytes > 0) {
1013 
1014  if (bytes == ID3v2_HEADER_SIZE - *len)
1015  /* no EOF yet, so fill the caller buffer again after
1016  * we have stripped the ID3 tags */
1017  fill_buf = 1;
1018 
1019  *len += bytes;
1020 
1021  } else if (*len <= 0) {
1022  /* error/EOF */
1023  *len = bytes;
1024  fill_buf = 0;
1025  }
1026  }
1027 
1028  if (*len < ID3v2_HEADER_SIZE)
1029  break;
1030 
1031  if (ff_id3v2_match(buf, ID3v2_DEFAULT_MAGIC)) {
1032  int64_t maxsize = seg->size >= 0 ? seg->size : 1024*1024;
1033  int taglen = ff_id3v2_tag_len(buf);
1034  int tag_got_bytes = FFMIN(taglen, *len);
1035  int remaining = taglen - tag_got_bytes;
1036 
1037  if (taglen > maxsize) {
1038  av_log(pls->ctx, AV_LOG_ERROR, "Too large HLS ID3 tag (%d > %"PRId64" bytes)\n",
1039  taglen, maxsize);
1040  break;
1041  }
1042 
1043  /*
1044  * Copy the id3 tag to our temporary id3 buffer.
1045  * We could read a small id3 tag directly without memcpy, but
1046  * we would still need to copy the large tags, and handling
1047  * both of those cases together with the possibility for multiple
1048  * tags would make the handling a bit complex.
1049  */
1050  pls->id3_buf = av_fast_realloc(pls->id3_buf, &pls->id3_buf_size, id3_buf_pos + taglen);
1051  if (!pls->id3_buf)
1052  break;
1053  memcpy(pls->id3_buf + id3_buf_pos, buf, tag_got_bytes);
1054  id3_buf_pos += tag_got_bytes;
1055 
1056  /* strip the intercepted bytes */
1057  *len -= tag_got_bytes;
1058  memmove(buf, buf + tag_got_bytes, *len);
1059  av_log(pls->ctx, AV_LOG_DEBUG, "Stripped %d HLS ID3 bytes\n", tag_got_bytes);
1060 
1061  if (remaining > 0) {
1062  /* read the rest of the tag in */
1063  if (read_from_url(pls, seg, pls->id3_buf + id3_buf_pos, remaining, READ_COMPLETE) != remaining)
1064  break;
1065  id3_buf_pos += remaining;
1066  av_log(pls->ctx, AV_LOG_DEBUG, "Stripped additional %d HLS ID3 bytes\n", remaining);
1067  }
1068 
1069  } else {
1070  /* no more ID3 tags */
1071  break;
1072  }
1073  }
1074 
1075  /* re-fill buffer for the caller unless EOF */
1076  if (*len >= 0 && (fill_buf || *len == 0)) {
1077  bytes = read_from_url(pls, seg, buf + *len, buf_size - *len, READ_NORMAL);
1078 
1079  /* ignore error if we already had some data */
1080  if (bytes >= 0)
1081  *len += bytes;
1082  else if (*len == 0)
1083  *len = bytes;
1084  }
1085 
1086  if (pls->id3_buf) {
1087  /* Now parse all the ID3 tags */
1088  AVIOContext id3ioctx;
1089  ffio_init_context(&id3ioctx, pls->id3_buf, id3_buf_pos, 0, NULL, NULL, NULL, NULL);
1090  handle_id3(&id3ioctx, pls);
1091  }
1092 
1093  if (pls->is_id3_timestamped == -1)
1095 }
1096 
1097 static int open_input(HLSContext *c, struct playlist *pls, struct segment *seg)
1098 {
1099  AVDictionary *opts = NULL;
1100  int ret;
1101 
1102  // broker prior HTTP options that should be consistent across requests
1103  av_dict_set(&opts, "user-agent", c->user_agent, 0);
1104  av_dict_set(&opts, "cookies", c->cookies, 0);
1105  av_dict_set(&opts, "headers", c->headers, 0);
1106  av_dict_set(&opts, "seekable", "0", 0);
1107 
1108  if (seg->size >= 0) {
1109  /* try to restrict the HTTP request to the part we want
1110  * (if this is in fact a HTTP request) */
1111  av_dict_set_int(&opts, "offset", seg->url_offset, 0);
1112  av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
1113  }
1114 
1115  av_log(pls->parent, AV_LOG_VERBOSE, "HLS request for url '%s', offset %"PRId64", playlist %d\n",
1116  seg->url, seg->url_offset, pls->index);
1117 
1118  if (seg->key_type == KEY_NONE) {
1119  ret = open_url(pls->parent->priv_data, &pls->input, seg->url, opts);
1120  } else if (seg->key_type == KEY_AES_128) {
1121 // HLSContext *c = var->parent->priv_data;
1122  char iv[33], key[33], url[MAX_URL_SIZE];
1123  if (strcmp(seg->key, pls->key_url)) {
1124  URLContext *uc;
1125  if (open_url(pls->parent->priv_data, &uc, seg->key, opts) == 0) {
1126  if (ffurl_read_complete(uc, pls->key, sizeof(pls->key))
1127  != sizeof(pls->key)) {
1128  av_log(NULL, AV_LOG_ERROR, "Unable to read key file %s\n",
1129  seg->key);
1130  }
1131  ffurl_close(uc);
1132  } else {
1133  av_log(NULL, AV_LOG_ERROR, "Unable to open key file %s\n",
1134  seg->key);
1135  }
1136  av_strlcpy(pls->key_url, seg->key, sizeof(pls->key_url));
1137  }
1138  ff_data_to_hex(iv, seg->iv, sizeof(seg->iv), 0);
1139  ff_data_to_hex(key, pls->key, sizeof(pls->key), 0);
1140  iv[32] = key[32] = '\0';
1141  if (strstr(seg->url, "://"))
1142  snprintf(url, sizeof(url), "crypto+%s", seg->url);
1143  else
1144  snprintf(url, sizeof(url), "crypto:%s", seg->url);
1145 
1146  if ((ret = ffurl_alloc(&pls->input, url, AVIO_FLAG_READ,
1147  &pls->parent->interrupt_callback)) < 0)
1148  goto cleanup;
1149  av_opt_set(pls->input->priv_data, "key", key, 0);
1150  av_opt_set(pls->input->priv_data, "iv", iv, 0);
1151 
1152  if ((ret = url_connect(pls, c->avio_opts, opts)) < 0) {
1153  goto cleanup;
1154  }
1155  ret = 0;
1156  } else if (seg->key_type == KEY_SAMPLE_AES) {
1157  av_log(pls->parent, AV_LOG_ERROR,
1158  "SAMPLE-AES encryption is not supported yet\n");
1159  ret = AVERROR_PATCHWELCOME;
1160  }
1161  else
1162  ret = AVERROR(ENOSYS);
1163 
1164  /* Seek to the requested position. If this was a HTTP request, the offset
1165  * should already be where want it to, but this allows e.g. local testing
1166  * without a HTTP server. */
1167  if (ret == 0 && seg->key_type == KEY_NONE && seg->url_offset) {
1168  int seekret = ffurl_seek(pls->input, seg->url_offset, SEEK_SET);
1169  if (seekret < 0) {
1170  av_log(pls->parent, AV_LOG_ERROR, "Unable to seek to offset %"PRId64" of HLS segment '%s'\n", seg->url_offset, seg->url);
1171  ret = seekret;
1172  ffurl_close(pls->input);
1173  pls->input = NULL;
1174  }
1175  }
1176 
1177 cleanup:
1178  av_dict_free(&opts);
1179  pls->cur_seg_offset = 0;
1180  return ret;
1181 }
1182 
1183 static int update_init_section(struct playlist *pls, struct segment *seg)
1184 {
1185  static const int max_init_section_size = 1024*1024;
1186  HLSContext *c = pls->parent->priv_data;
1187  int64_t sec_size;
1188  int64_t urlsize;
1189  int ret;
1190 
1191  if (seg->init_section == pls->cur_init_section)
1192  return 0;
1193 
1194  pls->cur_init_section = NULL;
1195 
1196  if (!seg->init_section)
1197  return 0;
1198 
1199  /* this will clobber playlist URLContext stuff, so this should be
1200  * called between segments only */
1201  ret = open_input(c, pls, seg->init_section);
1202  if (ret < 0) {
1204  "Failed to open an initialization section in playlist %d\n",
1205  pls->index);
1206  return ret;
1207  }
1208 
1209  if (seg->init_section->size >= 0)
1210  sec_size = seg->init_section->size;
1211  else if ((urlsize = ffurl_size(pls->input)) >= 0)
1212  sec_size = urlsize;
1213  else
1214  sec_size = max_init_section_size;
1215 
1216  av_log(pls->parent, AV_LOG_DEBUG,
1217  "Downloading an initialization section of size %"PRId64"\n",
1218  sec_size);
1219 
1220  sec_size = FFMIN(sec_size, max_init_section_size);
1221 
1222  av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size);
1223 
1224  ret = read_from_url(pls, seg->init_section, pls->init_sec_buf,
1226  ffurl_close(pls->input);
1227  pls->input = NULL;
1228 
1229  if (ret < 0)
1230  return ret;
1231 
1232  pls->cur_init_section = seg->init_section;
1233  pls->init_sec_data_len = ret;
1234  pls->init_sec_buf_read_offset = 0;
1235 
1236  /* spec says audio elementary streams do not have media initialization
1237  * sections, so there should be no ID3 timestamps */
1238  pls->is_id3_timestamped = 0;
1239 
1240  return 0;
1241 }
1242 
1243 static int64_t default_reload_interval(struct playlist *pls)
1244 {
1245  return pls->n_segments > 0 ?
1246  pls->segments[pls->n_segments - 1]->duration :
1247  pls->target_duration;
1248 }
1249 
1250 static int read_data(void *opaque, uint8_t *buf, int buf_size)
1251 {
1252  struct playlist *v = opaque;
1253  HLSContext *c = v->parent->priv_data;
1254  int ret, i;
1255  int just_opened = 0;
1256  int reload_count = 0;
1257 
1258 restart:
1259  if (!v->needed)
1260  return AVERROR_EOF;
1261 
1262  if (!v->input) {
1263  int64_t reload_interval;
1264  struct segment *seg;
1265 
1266  /* Check that the playlist is still needed before opening a new
1267  * segment. */
1268  if (v->ctx && v->ctx->nb_streams &&
1269  v->parent->nb_streams >= v->stream_offset + v->ctx->nb_streams) {
1270  v->needed = 0;
1271  for (i = v->stream_offset; i < v->stream_offset + v->ctx->nb_streams;
1272  i++) {
1273  if (v->parent->streams[i]->discard < AVDISCARD_ALL)
1274  v->needed = 1;
1275  }
1276  }
1277  if (!v->needed) {
1278  av_log(v->parent, AV_LOG_INFO, "No longer receiving playlist %d\n",
1279  v->index);
1280  return AVERROR_EOF;
1281  }
1282 
1283  /* If this is a live stream and the reload interval has elapsed since
1284  * the last playlist reload, reload the playlists now. */
1285  reload_interval = default_reload_interval(v);
1286 
1287 reload:
1288  reload_count++;
1289  if (reload_count > c->max_reload)
1290  return AVERROR_EOF;
1291  if (!v->finished &&
1292  av_gettime_relative() - v->last_load_time >= reload_interval) {
1293  if ((ret = parse_playlist(c, v->url, v, NULL)) < 0) {
1294  av_log(v->parent, AV_LOG_WARNING, "Failed to reload playlist %d\n",
1295  v->index);
1296  return ret;
1297  }
1298  /* If we need to reload the playlist again below (if
1299  * there's still no more segments), switch to a reload
1300  * interval of half the target duration. */
1301  reload_interval = v->target_duration / 2;
1302  }
1303  if (v->cur_seq_no < v->start_seq_no) {
1305  "skipping %d segments ahead, expired from playlists\n",
1306  v->start_seq_no - v->cur_seq_no);
1307  v->cur_seq_no = v->start_seq_no;
1308  }
1309  if (v->cur_seq_no >= v->start_seq_no + v->n_segments) {
1310  if (v->finished)
1311  return AVERROR_EOF;
1312  while (av_gettime_relative() - v->last_load_time < reload_interval) {
1314  return AVERROR_EXIT;
1315  av_usleep(100*1000);
1316  }
1317  /* Enough time has elapsed since the last reload */
1318  goto reload;
1319  }
1320 
1321  seg = current_segment(v);
1322 
1323  /* load/update Media Initialization Section, if any */
1324  ret = update_init_section(v, seg);
1325  if (ret)
1326  return ret;
1327 
1328  ret = open_input(c, v, seg);
1329  if (ret < 0) {
1331  return AVERROR_EXIT;
1332  av_log(v->parent, AV_LOG_WARNING, "Failed to open segment of playlist %d\n",
1333  v->index);
1334  v->cur_seq_no += 1;
1335  goto reload;
1336  }
1337  just_opened = 1;
1338  }
1339 
1341  /* Push init section out first before first actual segment */
1342  int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size);
1343  memcpy(buf, v->init_sec_buf, copy_size);
1344  v->init_sec_buf_read_offset += copy_size;
1345  return copy_size;
1346  }
1347 
1348  ret = read_from_url(v, current_segment(v), buf, buf_size, READ_NORMAL);
1349  if (ret > 0) {
1350  if (just_opened && v->is_id3_timestamped != 0) {
1351  /* Intercept ID3 tags here, elementary audio streams are required
1352  * to convey timestamps using them in the beginning of each segment. */
1353  intercept_id3(v, buf, buf_size, &ret);
1354  }
1355 
1356  return ret;
1357  }
1358  ffurl_close(v->input);
1359  v->input = NULL;
1360  v->cur_seq_no++;
1361 
1362  c->cur_seq_no = v->cur_seq_no;
1363 
1364  goto restart;
1365 }
1366 
1368 {
1369  int variant_count = 0;
1370  int i, j;
1371 
1372  for (i = 0; i < c->n_variants && variant_count < 2; i++) {
1373  struct variant *v = c->variants[i];
1374 
1375  for (j = 0; j < v->n_playlists; j++) {
1376  if (v->playlists[j] == pls) {
1377  variant_count++;
1378  break;
1379  }
1380  }
1381  }
1382 
1383  return variant_count >= 2;
1384 }
1385 
1386 static void add_renditions_to_variant(HLSContext *c, struct variant *var,
1387  enum AVMediaType type, const char *group_id)
1388 {
1389  int i;
1390 
1391  for (i = 0; i < c->n_renditions; i++) {
1392  struct rendition *rend = c->renditions[i];
1393 
1394  if (rend->type == type && !strcmp(rend->group_id, group_id)) {
1395 
1396  if (rend->playlist)
1397  /* rendition is an external playlist
1398  * => add the playlist to the variant */
1399  dynarray_add(&var->playlists, &var->n_playlists, rend->playlist);
1400  else
1401  /* rendition is part of the variant main Media Playlist
1402  * => add the rendition to the main Media Playlist */
1403  dynarray_add(&var->playlists[0]->renditions,
1404  &var->playlists[0]->n_renditions,
1405  rend);
1406  }
1407  }
1408 }
1409 
1411  enum AVMediaType type)
1412 {
1413  int rend_idx = 0;
1414  int i;
1415 
1416  for (i = 0; i < pls->ctx->nb_streams; i++) {
1417  AVStream *st = s->streams[pls->stream_offset + i];
1418 
1419  if (st->codec->codec_type != type)
1420  continue;
1421 
1422  for (; rend_idx < pls->n_renditions; rend_idx++) {
1423  struct rendition *rend = pls->renditions[rend_idx];
1424 
1425  if (rend->type != type)
1426  continue;
1427 
1428  if (rend->language[0])
1429  av_dict_set(&st->metadata, "language", rend->language, 0);
1430  if (rend->name[0])
1431  av_dict_set(&st->metadata, "comment", rend->name, 0);
1432 
1433  st->disposition |= rend->disposition;
1434  }
1435  if (rend_idx >=pls->n_renditions)
1436  break;
1437  }
1438 }
1439 
1440 /* if timestamp was in valid range: returns 1 and sets seq_no
1441  * if not: returns 0 and sets seq_no to closest segment */
1443  int64_t timestamp, int *seq_no)
1444 {
1445  int i;
1446  int64_t pos = c->first_timestamp == AV_NOPTS_VALUE ?
1447  0 : c->first_timestamp;
1448 
1449  if (timestamp < pos) {
1450  *seq_no = pls->start_seq_no;
1451  return 0;
1452  }
1453 
1454  for (i = 0; i < pls->n_segments; i++) {
1455  int64_t diff = pos + pls->segments[i]->duration - timestamp;
1456  if (diff > 0) {
1457  *seq_no = pls->start_seq_no + i;
1458  return 1;
1459  }
1460  pos += pls->segments[i]->duration;
1461  }
1462 
1463  *seq_no = pls->start_seq_no + pls->n_segments - 1;
1464 
1465  return 0;
1466 }
1467 
1468 static int select_cur_seq_no(HLSContext *c, struct playlist *pls)
1469 {
1470  int seq_no;
1471 
1472  if (!pls->finished && !c->first_packet &&
1474  /* reload the playlist since it was suspended */
1475  parse_playlist(c, pls->url, pls, NULL);
1476 
1477  /* If playback is already in progress (we are just selecting a new
1478  * playlist) and this is a complete file, find the matching segment
1479  * by counting durations. */
1480  if (pls->finished && c->cur_timestamp != AV_NOPTS_VALUE) {
1481  find_timestamp_in_playlist(c, pls, c->cur_timestamp, &seq_no);
1482  return seq_no;
1483  }
1484 
1485  if (!pls->finished) {
1486  if (!c->first_packet && /* we are doing a segment selection during playback */
1487  c->cur_seq_no >= pls->start_seq_no &&
1488  c->cur_seq_no < pls->start_seq_no + pls->n_segments)
1489  /* While spec 3.4.3 says that we cannot assume anything about the
1490  * content at the same sequence number on different playlists,
1491  * in practice this seems to work and doing it otherwise would
1492  * require us to download a segment to inspect its timestamps. */
1493  return c->cur_seq_no;
1494 
1495  /* If this is a live stream, start live_start_index segments from the
1496  * start or end */
1497  if (c->live_start_index < 0)
1498  return pls->start_seq_no + FFMAX(pls->n_segments + c->live_start_index, 0);
1499  else
1500  return pls->start_seq_no + FFMIN(c->live_start_index, pls->n_segments - 1);
1501  }
1502 
1503  /* Otherwise just start on the first segment. */
1504  return pls->start_seq_no;
1505 }
1506 
1508 {
1509  HLSContext *c = s->priv_data;
1510  const char *opts[] = { "headers", "user_agent", "user-agent", "cookies", NULL }, **opt = opts;
1511  uint8_t *buf;
1512  int ret = 0;
1513 
1514  while (*opt) {
1515  if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN, &buf) >= 0) {
1516  ret = av_dict_set(&c->avio_opts, *opt, buf,
1518  if (ret < 0)
1519  return ret;
1520  }
1521  opt++;
1522  }
1523 
1524  return ret;
1525 }
1526 
1528 {
1529  URLContext *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb->opaque;
1530  HLSContext *c = s->priv_data;
1531  int ret = 0, i, j, stream_offset = 0;
1532 
1533  c->interrupt_callback = &s->interrupt_callback;
1534 
1535  c->first_packet = 1;
1536  c->first_timestamp = AV_NOPTS_VALUE;
1537  c->cur_timestamp = AV_NOPTS_VALUE;
1538 
1539  // if the URL context is good, read important options we must broker later
1540  if (u && u->prot->priv_data_class) {
1541  // get the previous user agent & set back to null if string size is zero
1542  update_options(&c->user_agent, "user-agent", u->priv_data);
1543 
1544  // get the previous cookies & set back to null if string size is zero
1545  update_options(&c->cookies, "cookies", u->priv_data);
1546 
1547  // get the previous headers & set back to null if string size is zero
1548  update_options(&c->headers, "headers", u->priv_data);
1549  }
1550 
1551  if ((ret = parse_playlist(c, s->filename, NULL, s->pb)) < 0)
1552  goto fail;
1553 
1554  if ((ret = save_avio_options(s)) < 0)
1555  goto fail;
1556 
1557  /* Some HLS servers don't like being sent the range header */
1558  av_dict_set(&c->avio_opts, "seekable", "0", 0);
1559 
1560  if (c->n_variants == 0) {
1561  av_log(NULL, AV_LOG_WARNING, "Empty playlist\n");
1562  ret = AVERROR_EOF;
1563  goto fail;
1564  }
1565  /* If the playlist only contained playlists (Master Playlist),
1566  * parse each individual playlist. */
1567  if (c->n_playlists > 1 || c->playlists[0]->n_segments == 0) {
1568  for (i = 0; i < c->n_playlists; i++) {
1569  struct playlist *pls = c->playlists[i];
1570  if ((ret = parse_playlist(c, pls->url, pls, NULL)) < 0)
1571  goto fail;
1572  }
1573  }
1574 
1575  if (c->variants[0]->playlists[0]->n_segments == 0) {
1576  av_log(NULL, AV_LOG_WARNING, "Empty playlist\n");
1577  ret = AVERROR_EOF;
1578  goto fail;
1579  }
1580 
1581  /* If this isn't a live stream, calculate the total duration of the
1582  * stream. */
1583  if (c->variants[0]->playlists[0]->finished) {
1584  int64_t duration = 0;
1585  for (i = 0; i < c->variants[0]->playlists[0]->n_segments; i++)
1586  duration += c->variants[0]->playlists[0]->segments[i]->duration;
1587  s->duration = duration;
1588  }
1589 
1590  /* Associate renditions with variants */
1591  for (i = 0; i < c->n_variants; i++) {
1592  struct variant *var = c->variants[i];
1593 
1594  if (var->audio_group[0])
1596  if (var->video_group[0])
1598  if (var->subtitles_group[0])
1600  }
1601 
1602  /* Open the demuxer for each playlist */
1603  for (i = 0; i < c->n_playlists; i++) {
1604  struct playlist *pls = c->playlists[i];
1605  AVInputFormat *in_fmt = NULL;
1606 
1607  if (!(pls->ctx = avformat_alloc_context())) {
1608  ret = AVERROR(ENOMEM);
1609  goto fail;
1610  }
1611 
1612  if (pls->n_segments == 0)
1613  continue;
1614 
1615  pls->index = i;
1616  pls->needed = 1;
1617  pls->parent = s;
1618  pls->cur_seq_no = select_cur_seq_no(c, pls);
1619 
1621  if (!pls->read_buffer){
1622  ret = AVERROR(ENOMEM);
1623  avformat_free_context(pls->ctx);
1624  pls->ctx = NULL;
1625  goto fail;
1626  }
1627  ffio_init_context(&pls->pb, pls->read_buffer, INITIAL_BUFFER_SIZE, 0, pls,
1628  read_data, NULL, NULL);
1629  pls->pb.seekable = 0;
1630  ret = av_probe_input_buffer(&pls->pb, &in_fmt, pls->segments[0]->url,
1631  NULL, 0, 0);
1632  if (ret < 0) {
1633  /* Free the ctx - it isn't initialized properly at this point,
1634  * so avformat_close_input shouldn't be called. If
1635  * avformat_open_input fails below, it frees and zeros the
1636  * context, so it doesn't need any special treatment like this. */
1637  av_log(s, AV_LOG_ERROR, "Error when loading first segment '%s'\n", pls->segments[0]->url);
1638  avformat_free_context(pls->ctx);
1639  pls->ctx = NULL;
1640  goto fail;
1641  }
1642  pls->ctx->pb = &pls->pb;
1644 
1645  if ((ret = ff_copy_whitelists(pls->ctx, s)) < 0)
1646  goto fail;
1647 
1648  ret = avformat_open_input(&pls->ctx, pls->segments[0]->url, in_fmt, NULL);
1649  if (ret < 0)
1650  goto fail;
1651 
1652  if (pls->id3_deferred_extra && pls->ctx->nb_streams == 1) {
1656  pls->id3_deferred_extra = NULL;
1657  }
1658 
1659  pls->ctx->ctx_flags &= ~AVFMTCTX_NOHEADER;
1660  ret = avformat_find_stream_info(pls->ctx, NULL);
1661  if (ret < 0)
1662  goto fail;
1663 
1664  if (pls->is_id3_timestamped == -1)
1665  av_log(s, AV_LOG_WARNING, "No expected HTTP requests have been made\n");
1666 
1667  /* Create new AVStreams for each stream in this playlist */
1668  for (j = 0; j < pls->ctx->nb_streams; j++) {
1669  AVStream *st = avformat_new_stream(s, NULL);
1670  AVStream *ist = pls->ctx->streams[j];
1671  if (!st) {
1672  ret = AVERROR(ENOMEM);
1673  goto fail;
1674  }
1675  st->id = i;
1676 
1677  avcodec_copy_context(st->codec, pls->ctx->streams[j]->codec);
1678 
1679  if (pls->is_id3_timestamped) /* custom timestamps via id3 */
1680  avpriv_set_pts_info(st, 33, 1, MPEG_TIME_BASE);
1681  else
1683  }
1684 
1688 
1689  stream_offset += pls->ctx->nb_streams;
1690  }
1691 
1692  /* Create a program for each variant */
1693  for (i = 0; i < c->n_variants; i++) {
1694  struct variant *v = c->variants[i];
1695  AVProgram *program;
1696 
1697  program = av_new_program(s, i);
1698  if (!program)
1699  goto fail;
1700  av_dict_set_int(&program->metadata, "variant_bitrate", v->bandwidth, 0);
1701 
1702  for (j = 0; j < v->n_playlists; j++) {
1703  struct playlist *pls = v->playlists[j];
1704  int is_shared = playlist_in_multiple_variants(c, pls);
1705  int k;
1706 
1707  for (k = 0; k < pls->ctx->nb_streams; k++) {
1708  struct AVStream *st = s->streams[pls->stream_offset + k];
1709 
1711 
1712  /* Set variant_bitrate for streams unique to this variant */
1713  if (!is_shared && v->bandwidth)
1714  av_dict_set_int(&st->metadata, "variant_bitrate", v->bandwidth, 0);
1715  }
1716  }
1717  }
1718 
1719  return 0;
1720 fail:
1724  return ret;
1725 }
1726 
1727 static int recheck_discard_flags(AVFormatContext *s, int first)
1728 {
1729  HLSContext *c = s->priv_data;
1730  int i, changed = 0;
1731 
1732  /* Check if any new streams are needed */
1733  for (i = 0; i < c->n_playlists; i++)
1734  c->playlists[i]->cur_needed = 0;
1735 
1736  for (i = 0; i < s->nb_streams; i++) {
1737  AVStream *st = s->streams[i];
1738  struct playlist *pls = c->playlists[s->streams[i]->id];
1739  if (st->discard < AVDISCARD_ALL)
1740  pls->cur_needed = 1;
1741  }
1742  for (i = 0; i < c->n_playlists; i++) {
1743  struct playlist *pls = c->playlists[i];
1744  if (pls->cur_needed && !pls->needed) {
1745  pls->needed = 1;
1746  changed = 1;
1747  pls->cur_seq_no = select_cur_seq_no(c, pls);
1748  pls->pb.eof_reached = 0;
1749  if (c->cur_timestamp != AV_NOPTS_VALUE) {
1750  /* catch up */
1751  pls->seek_timestamp = c->cur_timestamp;
1752  pls->seek_flags = AVSEEK_FLAG_ANY;
1753  pls->seek_stream_index = -1;
1754  }
1755  av_log(s, AV_LOG_INFO, "Now receiving playlist %d, segment %d\n", i, pls->cur_seq_no);
1756  } else if (first && !pls->cur_needed && pls->needed) {
1757  if (pls->input)
1758  ffurl_close(pls->input);
1759  pls->input = NULL;
1760  pls->needed = 0;
1761  changed = 1;
1762  av_log(s, AV_LOG_INFO, "No longer receiving playlist %d\n", i);
1763  }
1764  }
1765  return changed;
1766 }
1767 
1769 {
1770  if (pls->id3_offset >= 0) {
1771  pls->pkt.dts = pls->id3_mpegts_timestamp +
1772  av_rescale_q(pls->id3_offset,
1773  pls->ctx->streams[pls->pkt.stream_index]->time_base,
1775  if (pls->pkt.duration)
1776  pls->id3_offset += pls->pkt.duration;
1777  else
1778  pls->id3_offset = -1;
1779  } else {
1780  /* there have been packets with unknown duration
1781  * since the last id3 tag, should not normally happen */
1782  pls->pkt.dts = AV_NOPTS_VALUE;
1783  }
1784 
1785  if (pls->pkt.duration)
1786  pls->pkt.duration = av_rescale_q(pls->pkt.duration,
1787  pls->ctx->streams[pls->pkt.stream_index]->time_base,
1789 
1790  pls->pkt.pts = AV_NOPTS_VALUE;
1791 }
1792 
1793 static AVRational get_timebase(struct playlist *pls)
1794 {
1795  if (pls->is_id3_timestamped)
1796  return MPEG_TIME_BASE_Q;
1797 
1798  return pls->ctx->streams[pls->pkt.stream_index]->time_base;
1799 }
1800 
1801 static int compare_ts_with_wrapdetect(int64_t ts_a, struct playlist *pls_a,
1802  int64_t ts_b, struct playlist *pls_b)
1803 {
1804  int64_t scaled_ts_a = av_rescale_q(ts_a, get_timebase(pls_a), MPEG_TIME_BASE_Q);
1805  int64_t scaled_ts_b = av_rescale_q(ts_b, get_timebase(pls_b), MPEG_TIME_BASE_Q);
1806 
1807  return av_compare_mod(scaled_ts_a, scaled_ts_b, 1LL << 33);
1808 }
1809 
1811 {
1812  HLSContext *c = s->priv_data;
1813  int ret, i, minplaylist = -1;
1814 
1816  c->first_packet = 0;
1817 
1818  for (i = 0; i < c->n_playlists; i++) {
1819  struct playlist *pls = c->playlists[i];
1820  /* Make sure we've got one buffered packet from each open playlist
1821  * stream */
1822  if (pls->needed && !pls->pkt.data) {
1823  while (1) {
1824  int64_t ts_diff;
1825  AVRational tb;
1826  ret = av_read_frame(pls->ctx, &pls->pkt);
1827  if (ret < 0) {
1828  if (!avio_feof(&pls->pb) && ret != AVERROR_EOF)
1829  return ret;
1830  reset_packet(&pls->pkt);
1831  break;
1832  } else {
1833  /* stream_index check prevents matching picture attachments etc. */
1834  if (pls->is_id3_timestamped && pls->pkt.stream_index == 0) {
1835  /* audio elementary streams are id3 timestamped */
1837  }
1838 
1839  if (c->first_timestamp == AV_NOPTS_VALUE &&
1840  pls->pkt.dts != AV_NOPTS_VALUE)
1841  c->first_timestamp = av_rescale_q(pls->pkt.dts,
1843  }
1844 
1845  if (pls->seek_timestamp == AV_NOPTS_VALUE)
1846  break;
1847 
1848  if (pls->seek_stream_index < 0 ||
1849  pls->seek_stream_index == pls->pkt.stream_index) {
1850 
1851  if (pls->pkt.dts == AV_NOPTS_VALUE) {
1853  break;
1854  }
1855 
1856  tb = get_timebase(pls);
1857  ts_diff = av_rescale_rnd(pls->pkt.dts, AV_TIME_BASE,
1858  tb.den, AV_ROUND_DOWN) -
1859  pls->seek_timestamp;
1860  if (ts_diff >= 0 && (pls->seek_flags & AVSEEK_FLAG_ANY ||
1861  pls->pkt.flags & AV_PKT_FLAG_KEY)) {
1863  break;
1864  }
1865  }
1866  av_free_packet(&pls->pkt);
1867  reset_packet(&pls->pkt);
1868  }
1869  }
1870  /* Check if this stream has the packet with the lowest dts */
1871  if (pls->pkt.data) {
1872  struct playlist *minpls = minplaylist < 0 ?
1873  NULL : c->playlists[minplaylist];
1874  if (minplaylist < 0) {
1875  minplaylist = i;
1876  } else {
1877  int64_t dts = pls->pkt.dts;
1878  int64_t mindts = minpls->pkt.dts;
1879 
1880  if (dts == AV_NOPTS_VALUE ||
1881  (mindts != AV_NOPTS_VALUE && compare_ts_with_wrapdetect(dts, pls, mindts, minpls) < 0))
1882  minplaylist = i;
1883  }
1884  }
1885  }
1886 
1887  /* If we got a packet, return it */
1888  if (minplaylist >= 0) {
1889  struct playlist *pls = c->playlists[minplaylist];
1890  *pkt = pls->pkt;
1891  pkt->stream_index += pls->stream_offset;
1892  reset_packet(&c->playlists[minplaylist]->pkt);
1893 
1894  if (pkt->dts != AV_NOPTS_VALUE)
1895  c->cur_timestamp = av_rescale_q(pkt->dts,
1896  pls->ctx->streams[pls->pkt.stream_index]->time_base,
1897  AV_TIME_BASE_Q);
1898 
1899  return 0;
1900  }
1901  return AVERROR_EOF;
1902 }
1903 
1905 {
1906  HLSContext *c = s->priv_data;
1907 
1908  free_playlist_list(c);
1909  free_variant_list(c);
1911 
1912  av_dict_free(&c->avio_opts);
1913 
1914  return 0;
1915 }
1916 
1917 static int hls_read_seek(AVFormatContext *s, int stream_index,
1918  int64_t timestamp, int flags)
1919 {
1920  HLSContext *c = s->priv_data;
1921  struct playlist *seek_pls = NULL;
1922  int i, seq_no;
1923  int64_t first_timestamp, seek_timestamp, duration;
1924 
1925  if ((flags & AVSEEK_FLAG_BYTE) ||
1926  !(c->variants[0]->playlists[0]->finished || c->variants[0]->playlists[0]->type == PLS_TYPE_EVENT))
1927  return AVERROR(ENOSYS);
1928 
1929  first_timestamp = c->first_timestamp == AV_NOPTS_VALUE ?
1930  0 : c->first_timestamp;
1931 
1932  seek_timestamp = av_rescale_rnd(timestamp, AV_TIME_BASE,
1933  s->streams[stream_index]->time_base.den,
1934  flags & AVSEEK_FLAG_BACKWARD ?
1936 
1937  duration = s->duration == AV_NOPTS_VALUE ?
1938  0 : s->duration;
1939 
1940  if (0 < duration && duration < seek_timestamp - first_timestamp)
1941  return AVERROR(EIO);
1942 
1943  /* find the playlist with the specified stream */
1944  for (i = 0; i < c->n_playlists; i++) {
1945  struct playlist *pls = c->playlists[i];
1946  if (stream_index >= pls->stream_offset &&
1947  stream_index - pls->stream_offset < pls->ctx->nb_streams) {
1948  seek_pls = pls;
1949  break;
1950  }
1951  }
1952  /* check if the timestamp is valid for the playlist with the
1953  * specified stream index */
1954  if (!seek_pls || !find_timestamp_in_playlist(c, seek_pls, seek_timestamp, &seq_no))
1955  return AVERROR(EIO);
1956 
1957  /* set segment now so we do not need to search again below */
1958  seek_pls->cur_seq_no = seq_no;
1959  seek_pls->seek_stream_index = stream_index - seek_pls->stream_offset;
1960 
1961  for (i = 0; i < c->n_playlists; i++) {
1962  /* Reset reading */
1963  struct playlist *pls = c->playlists[i];
1964  if (pls->input) {
1965  ffurl_close(pls->input);
1966  pls->input = NULL;
1967  }
1968  av_free_packet(&pls->pkt);
1969  reset_packet(&pls->pkt);
1970  pls->pb.eof_reached = 0;
1971  /* Clear any buffered data */
1972  pls->pb.buf_end = pls->pb.buf_ptr = pls->pb.buffer;
1973  /* Reset the pos, to let the mpegts demuxer know we've seeked. */
1974  pls->pb.pos = 0;
1975  /* Flush the packet queue of the subdemuxer. */
1976  ff_read_frame_flush(pls->ctx);
1977 
1979  pls->seek_flags = flags;
1980 
1981  if (pls != seek_pls) {
1982  /* set closest segment seq_no for playlists not handled above */
1983  find_timestamp_in_playlist(c, pls, seek_timestamp, &pls->cur_seq_no);
1984  /* seek the playlist to the given position without taking
1985  * keyframes into account since this playlist does not have the
1986  * specified stream where we should look for the keyframes */
1987  pls->seek_stream_index = -1;
1988  pls->seek_flags |= AVSEEK_FLAG_ANY;
1989  }
1990  }
1991 
1993 
1994  return 0;
1995 }
1996 
1997 static int hls_probe(AVProbeData *p)
1998 {
1999  /* Require #EXTM3U at the start, and either one of the ones below
2000  * somewhere for a proper match. */
2001  if (strncmp(p->buf, "#EXTM3U", 7))
2002  return 0;
2003  if (strstr(p->buf, "#EXT-X-STREAM-INF:") ||
2004  strstr(p->buf, "#EXT-X-TARGETDURATION:") ||
2005  strstr(p->buf, "#EXT-X-MEDIA-SEQUENCE:"))
2006  return AVPROBE_SCORE_MAX;
2007  return 0;
2008 }
2009 
2010 #define OFFSET(x) offsetof(HLSContext, x)
2011 #define FLAGS AV_OPT_FLAG_DECODING_PARAM
2012 static const AVOption hls_options[] = {
2013  {"live_start_index", "segment index to start live streams at (negative values are from the end)",
2014  OFFSET(live_start_index), AV_OPT_TYPE_INT, {.i64 = -3}, INT_MIN, INT_MAX, FLAGS},
2015  {"allowed_extensions", "List of file extensions that hls is allowed to access",
2016  OFFSET(allowed_extensions), AV_OPT_TYPE_STRING,
2017  {.str = "3gp,aac,avi,flac,mkv,m3u8,m4a,m4s,m4v,mpg,mov,mp2,mp3,mp4,mpeg,mpegts,ogg,ogv,oga,ts,vob,wav"},
2018  INT_MIN, INT_MAX, FLAGS},
2019  {"max_reload", "Maximum number of times a insufficient list is attempted to be reloaded",
2020  OFFSET(max_reload), AV_OPT_TYPE_INT, {.i64 = 1000}, 0, INT_MAX, FLAGS},
2021  {NULL}
2022 };
2023 
2024 static const AVClass hls_class = {
2025  .class_name = "hls,applehttp",
2026  .item_name = av_default_item_name,
2027  .option = hls_options,
2028  .version = LIBAVUTIL_VERSION_INT,
2029 };
2030 
2032  .name = "hls,applehttp",
2033  .long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
2034  .priv_class = &hls_class,
2035  .priv_data_size = sizeof(HLSContext),
2036  .read_probe = hls_probe,
2039  .read_close = hls_close,
2041 };
#define AVSEEK_FLAG_BACKWARD
Definition: avformat.h:2296
uint8_t key[16]
Definition: hls.c:123
#define NULL
Definition: coverity.c:32
static int update_init_section(struct playlist *pls, struct segment *seg)
Definition: hls.c:1183
int needed
Definition: hls.c:110
struct segment * init_section
Definition: hls.c:77
float v
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:631
void * data
Definition: id3v2.h:57
Bytestream IO Context.
Definition: avio.h:111
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
int bandwidth
Definition: hls.c:170
Definition: hls.c:93
void av_free_packet(AVPacket *pkt)
Free a packet.
Definition: avpacket.c:284
char * headers
holds HTTP headers set as an AVOption to the HTTP protocol context
Definition: hls.c:198
char assoc_language[MAX_FIELD_LEN]
Definition: hls.c:443
ReadFromURLMode
Definition: hls.c:872
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1535
AVDictionary * id3_initial
Definition: hls.c:132
AVOption.
Definition: opt.h:255
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:237
struct segment ** init_sections
Definition: hls.c:151
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:426
static int read_from_url(struct playlist *pls, struct segment *seg, uint8_t *buf, int buf_size, enum ReadFromURLMode mode)
Definition: hls.c:878
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:63
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
unsigned int id3_buf_size
Definition: hls.c:131
ID3v2ExtraMeta * id3_deferred_extra
Definition: hls.c:135
#define LIBAVUTIL_VERSION_INT
Definition: version.h:62
unsigned char * buf_ptr
Current position in the buffer.
Definition: avio.h:127
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:128
#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:4093
#define AVSEEK_FLAG_ANY
seek to any frame, even non-keyframes
Definition: avformat.h:2298
char forced[4]
Definition: hls.c:446
static int open_in(HLSContext *c, AVIOContext **in, const char *url)
Definition: hls.c:581
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
int ffurl_connect(URLContext *uc, AVDictionary **options)
Connect an URLContext that has been allocated by ffurl_alloc.
Definition: avio.c:202
static struct rendition * new_rendition(HLSContext *c, struct rendition_info *info, const char *url_base)
Definition: hls.c:450
static int64_t default_reload_interval(struct playlist *pls)
Definition: hls.c:1243
int disposition
Definition: hls.c:166
unsigned int init_sec_data_len
Definition: hls.c:119
int num
numerator
Definition: rational.h:44
int size
Definition: avcodec.h:1434
#define ID3v2_DEFAULT_MAGIC
Default magic bytes for ID3v2 header: "ID3".
Definition: id3v2.h:35
#define AVIO_FLAG_READ
read-only
Definition: avio.h:485
struct URLProtocol * prot
Definition: url.h:41
char language[MAX_FIELD_LEN]
Definition: hls.c:442
static int open_input(HLSContext *c, struct playlist *pls, struct segment *seg)
Definition: hls.c:1097
unsigned char * buffer
Start of the buffer.
Definition: avio.h:125
#define AV_DISPOSITION_HEARING_IMPAIRED
stream for hearing impaired audiences
Definition: avformat.h:822
static void fill_buf(uint8_t *data, int w, int h, int linesize, uint8_t v)
char * key
Definition: hls.c:73
void * opaque
A private pointer, passed to the read/write/seek/...
Definition: avio.h:132
int av_usleep(unsigned usec)
Sleep for a period of time.
Definition: time.c:76
discard all
Definition: avcodec.h:689
char * user_agent
holds HTTP user agent set as an AVOption to the HTTP protocol context
Definition: hls.c:196
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:527
#define MAX_CHARACTERISTICS_LEN
Definition: hls.c:45
int ctx_flags
Flags signalling stream properties.
Definition: avformat.h:1334
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:1078
static void reset_packet(AVPacket *pkt)
Definition: hls.c:288
int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src)
Copy the settings of the source AVCodecContext into the destination AVCodecContext.
Definition: options.c:199
char * url
Definition: hls.c:72
int64_t url_offset
Definition: hls.c:70
const AVClass * priv_data_class
Definition: url.h:89
static int id3_has_changed_values(struct playlist *pls, AVDictionary *metadata, ID3v2ExtraMetaAPIC *apic)
Definition: hls.c:926
Format I/O context.
Definition: avformat.h:1285
#define MAX_URL_SIZE
Definition: internal.h:28
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:365
void ff_read_frame_flush(AVFormatContext *s)
Flush the frame reader.
Definition: utils.c:1627
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
unsigned int init_sec_buf_read_offset
Definition: hls.c:120
Public dictionary API.
char type[16]
Definition: hls.c:439
int n_renditions
Definition: hls.c:187
#define ID3v2_HEADER_SIZE
Definition: id3v2.h:30
#define MPEG_TIME_BASE_Q
Definition: hls.c:48
enum AVMediaType type
Definition: hls.c:161
uint8_t iv[16]
Definition: hls.c:75
char defaultr[4]
Definition: hls.c:445
uint8_t
Round toward +infinity.
Definition: mathematics.h:74
int n_variants
Definition: hls.c:183
#define FLAGS
Definition: hls.c:2011
#define av_malloc(s)
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1244
mode
Definition: f_perms.c:27
AVOptions.
int av_isspace(int c)
Locale-independent conversion of ASCII isspace.
Definition: avstring.c:330
char group_id[MAX_FIELD_LEN]
Definition: hls.c:441
int64_t cur_seg_offset
Definition: hls.c:112
char audio[MAX_FIELD_LEN]
Definition: hls.c:314
static void free_rendition_list(HLSContext *c)
Definition: hls.c:275
int id
Format-specific stream ID.
Definition: avformat.h:861
uint8_t * read_buffer
Definition: hls.c:96
char url[MAX_URL_SIZE]
Definition: hls.c:94
static void intercept_id3(struct playlist *pls, uint8_t *buf, int buf_size, int *len)
Definition: hls.c:997
static struct playlist * new_playlist(HLSContext *c, const char *url, const char *base)
Definition: hls.c:294
AVInputFormat ff_hls_demuxer
Definition: hls.c:2031
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:3756
int finished
Definition: hls.c:104
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1353
static void handle_id3(AVIOContext *pb, struct playlist *pls)
Definition: hls.c:955
int n_playlists
Definition: hls.c:185
AVFormatContext * avformat_alloc_context(void)
Allocate an AVFormatContext.
Definition: options.c:111
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:39
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1396
uint8_t * data
Definition: avcodec.h:1433
static int url_connect(struct playlist *pls, AVDictionary *opts, AVDictionary *opts2)
Definition: hls.c:594
AVProgram * av_new_program(AVFormatContext *s, int id)
Definition: utils.c:3827
static int read_data(void *opaque, uint8_t *buf, int buf_size)
Definition: hls.c:1250
#define AVERROR_EOF
End of file.
Definition: error.h:55
unsigned int init_sec_buf_size
Definition: hls.c:118
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
ptrdiff_t size
Definition: opengl_enc.c:101
struct rendition ** renditions
Definition: hls.c:146
static int64_t duration
Definition: ffplay.c:326
static void add_metadata_from_renditions(AVFormatContext *s, struct playlist *pls, enum AVMediaType type)
Definition: hls.c:1410
int duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1451
void av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:213
#define av_log(a,...)
static void free_playlist_list(HLSContext *c)
Definition: hls.c:235
struct rendition ** renditions
Definition: hls.c:188
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1479
struct variant ** variants
Definition: hls.c:184
static AVRational get_timebase(struct playlist *pls)
Definition: hls.c:1793
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:147
Callback for checking whether to abort blocking functions.
Definition: avio.h:50
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:338
int ffurl_alloc(URLContext **puc, const char *filename, int flags, const AVIOInterruptCB *int_cb)
Create a URLContext for accessing to the resource indicated by url, but do not initiate the connectio...
Definition: avio.c:277
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:1801
#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:71
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1497
char video_group[MAX_FIELD_LEN]
Definition: hls.c:177
void * av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)
Reallocate the given block if it is not large enough, otherwise do nothing.
Definition: mem.c:480
int64_t cur_timestamp
Definition: hls.c:194
int n_renditions
Definition: hls.c:145
static const AVClass hls_class
Definition: hls.c:2024
AVIOInterruptCB * interrupt_callback
Definition: hls.c:195
char bandwidth[20]
Definition: hls.c:312
static void handle_key_args(struct key_info *info, const char *key, int key_len, char **dest, int *dest_len)
Definition: hls.c:369
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:178
int avio_close(AVIOContext *s)
Close the resource accessed by the AVIOContext s and free it.
Definition: aviobuf.c:945
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
char byterange[32]
Definition: hls.c:386
int64_t id3_mpegts_timestamp
Definition: hls.c:128
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:199
static void free_segment_list(struct playlist *pls)
Definition: hls.c:212
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1062
Definition: graph2dot.c:48
void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
simple assert() macros that are a bit more flexible than ISO C assert().
int first_packet
Definition: hls.c:192
URLContext * input
Definition: hls.c:97
static int find_timestamp_in_playlist(HLSContext *c, struct playlist *pls, int64_t timestamp, int *seq_no)
Definition: hls.c:1442
uint8_t * data
Definition: id3v2.h:78
int64_t id3_offset
Definition: hls.c:129
int is_id3_timestamped
Definition: hls.c:127
New fields can be added to the end with minor version bumps.
Definition: avformat.h:1218
#define FFMAX(a, b)
Definition: common.h:90
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:57
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1439
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:873
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:462
int live_start_index
Definition: hls.c:191
Definition: hls.c:68
#define AV_DISPOSITION_FORCED
Track should be used during playback by default.
Definition: avformat.h:821
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1341
char group_id[MAX_FIELD_LEN]
Definition: hls.c:163
static struct segment * current_segment(struct playlist *pls)
Definition: hls.c:867
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:160
#define dynarray_add(tab, nb_ptr, elem)
Definition: internal.h:119
char filename[1024]
input or output filename
Definition: avformat.h:1361
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:246
#define FFMIN(a, b)
Definition: common.h:92
#define AV_OPT_SEARCH_CHILDREN
Search in possible children of the given object first.
Definition: opt.h:611
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that's been allocated with av_malloc() or another memory allocation functio...
Definition: dict.h:78
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
char * allowed_extensions
Definition: hls.c:200
int index
Definition: hls.c:99
static void add_renditions_to_variant(HLSContext *c, struct variant *var, enum AVMediaType type, const char *group_id)
Definition: hls.c:1386
uint8_t * init_sec_buf
Definition: hls.c:117
static int hls_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: hls.c:1810
uint8_t * id3_buf
Definition: hls.c:130
Definition: hls.c:363
static struct segment * new_init_section(struct playlist *pls, struct init_section_info *info, const char *url_base)
Definition: hls.c:389
int stream_offset
Definition: hls.c:102
float u
AVDictionary * metadata
Definition: avformat.h:928
static struct variant * new_variant(HLSContext *c, struct variant_info *info, const char *url, const char *base)
Definition: hls.c:319
#define AVFMT_FLAG_CUSTOM_IO
The caller has supplied a custom AVIOContext, don't avio_close() it.
Definition: avformat.h:1404
int ff_get_line(AVIOContext *s, char *buf, int maxlen)
Read a whole line of text from AVIOContext.
Definition: aviobuf.c:702
Usually treated as AVMEDIA_TYPE_DATA.
Definition: avutil.h:192
static void fill_timing_for_id3_timestamped_stream(struct playlist *pls)
Definition: hls.c:1768
struct segment ** segments
Definition: hls.c:109
#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:197
AVPacket pkt
Definition: hls.c:101
uint8_t * owner
Definition: id3v2.h:77
char subtitles_group[MAX_FIELD_LEN]
Definition: hls.c:178
char name[MAX_FIELD_LEN]
Definition: hls.c:444
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:634
#define AV_DISPOSITION_VISUAL_IMPAIRED
stream for visual impaired audiences
Definition: avformat.h:823
int64_t size
Definition: hls.c:71
enum KeyType key_type
Definition: hls.c:74
static void update_options(char **dest, const char *name, void *src)
Definition: hls.c:611
Stream structure.
Definition: avformat.h:854
int id3_changed
Definition: hls.c:134
#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:382
AVFormatContext * parent
Definition: hls.c:98
static int read_chomp_line(AVIOContext *s, char *buf, int maxlen)
Definition: hls.c:204
static void parse_id3(AVFormatContext *s, AVIOContext *pb, AVDictionary **metadata, int64_t *dts, ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta **extra_meta)
Definition: hls.c:900
#define AV_DISPOSITION_DEFAULT
Definition: avformat.h:809
int64_t first_timestamp
Definition: hls.c:193
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
AVS_Value src
Definition: avisynth_c.h:482
char subtitles[MAX_FIELD_LEN]
Definition: hls.c:316
enum AVMediaType codec_type
Definition: avcodec.h:1520
struct ID3v2ExtraMeta * next
Definition: id3v2.h:58
int ff_check_interrupt(AVIOInterruptCB *cb)
Check if the user has requested to interrup a blocking function associated with cb.
Definition: avio.c:607
enum PlaylistType type
Definition: hls.c:105
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:252
char * av_strdup(const char *s)
Duplicate the string s.
Definition: mem.c:267
AVIOContext * pb
I/O context.
Definition: avformat.h:1327
static int parse_playlist(HLSContext *c, const char *url, struct playlist *pls, AVIOContext *in)
Definition: hls.c:663
char url[MAX_URL_SIZE]
Definition: hlsproto.c:54
int n_init_sections
Definition: hls.c:150
uint8_t * data
The data buffer.
Definition: buffer.h:89
int64_t ffurl_size(URLContext *h)
Return the filesize of the resource accessed by h, AVERROR(ENOSYS) if the operation is not supported ...
Definition: avio.c:563
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> in
static const AVOption hls_options[]
Definition: hls.c:2012
static int hls_read_header(AVFormatContext *s)
Definition: hls.c:1527
void * buf
Definition: avisynth_c.h:553
Definition: url.h:39
int max_reload
Definition: hls.c:201
GLint GLenum type
Definition: opengl_enc.c:105
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:69
struct playlist ** playlists
Definition: hls.c:186
int64_t last_load_time
Definition: hls.c:113
Describe the class of an AVClass context structure.
Definition: log.h:67
#define AV_WB32(p, v)
Definition: intreadwrite.h:419
rational number numerator/denominator
Definition: rational.h:43
int cur_needed
Definition: hls.c:110
void * priv_data
Definition: url.h:42
struct segment * cur_init_section
Definition: hls.c:116
int seek_stream_index
Definition: hls.c:139
PlaylistType
Definition: hls.c:82
int64_t target_duration
Definition: hls.c:106
static int save_avio_options(AVFormatContext *s)
Definition: hls.c:1507
#define AVSEEK_FLAG_BYTE
seeking based on position in bytes
Definition: avformat.h:2297
char uri[MAX_URL_SIZE]
Definition: hls.c:440
AVMediaType
Definition: avutil.h:191
int n_playlists
Definition: hls.c:173
struct playlist * playlist
Definition: hls.c:162
int avio_open2(AVIOContext **s, const char *url, int flags, const AVIOInterruptCB *int_cb, AVDictionary **options)
Create and initialize a AVIOContext for accessing the resource indicated by url.
Definition: aviobuf.c:922
#define MPEG_TIME_BASE
Definition: hls.c:47
#define snprintf
Definition: snprintf.h:34
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:3693
This structure contains the data a format has to probe a file.
Definition: avformat.h:460
int ff_hex_to_data(uint8_t *data, const char *p)
Parse a string of hexadecimal strings.
Definition: utils.c:4065
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1480
Definition: hls.c:160
Round toward -infinity.
Definition: mathematics.h:73
static void handle_variant_args(struct variant_info *info, const char *key, int key_len, char **dest, int *dest_len)
Definition: hls.c:345
const char * avio_find_protocol_name(const char *url)
Return the name of the protocol that will handle the passed URL.
Definition: avio.c:425
int size
Size of data in bytes.
Definition: buffer.h:93
AVDictionary * metadata
Definition: avformat.h:1224
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:176
int64_t av_gettime_relative(void)
Get the current time in microseconds since some unspecified starting point.
Definition: time.c:56
int ff_copy_whitelists(AVFormatContext *dst, AVFormatContext *src)
Copies the whilelists from one context to the other.
Definition: utils.c:140
KeyType
Definition: hls.c:62
static int flags
Definition: cpu.c:47
int ffurl_close(URLContext *h)
Definition: avio.c:419
static int recheck_discard_flags(AVFormatContext *s, int first)
Definition: hls.c:1727
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:4118
int64_t seek_timestamp
Definition: hls.c:137
char iv[35]
Definition: hls.c:366
#define OFFSET(x)
Definition: hls.c:2010
char characteristics[MAX_CHARACTERISTICS_LEN]
Definition: hls.c:447
int seek_flags
Definition: hls.c:138
static int open_url(HLSContext *c, URLContext **uc, const char *url, AVDictionary *opts)
Definition: hls.c:619
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:472
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:164
AVIOContext pb
Definition: hls.c:95
Main libavformat public API header.
char uri[MAX_URL_SIZE]
Definition: hls.c:364
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:499
if(ret< 0)
Definition: vf_mcdeint.c:280
#define INITIAL_BUFFER_SIZE
Definition: hls.c:42
int64_t ffurl_seek(URLContext *h, int64_t pos, int whence)
Change the position that will be used by the next read/write operation on the resource accessed by h...
Definition: avio.c:387
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:72
int ffurl_open(URLContext **puc, const char *filename, int flags, const AVIOInterruptCB *int_cb, AVDictionary **options)
Create an URLContext for accessing to the resource indicated by url, and open it. ...
Definition: avio.c:299
#define MAX_FIELD_LEN
Definition: hls.c:44
int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
Read packets of a media file to get stream information.
Definition: utils.c:3098
const char * tag
Definition: id3v2.h:56
static double c[64]
int cur_seq_no
Definition: hls.c:190
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:143
int ffurl_read_complete(URLContext *h, unsigned char *buf, int size)
Read as many bytes as possible (up to size), calling the read function multiple times if necessary...
Definition: avio.c:367
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:917
int64_t pos
position in the file of the current buffer
Definition: avio.h:137
int pts_wrap_bits
number of bits in pts (used for wrapping control)
Definition: avformat.h:1020
static int playlist_in_multiple_variants(HLSContext *c, struct playlist *pls)
Definition: hls.c:1367
AVDictionary * avio_opts
Definition: hls.c:199
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:49
char * key
Definition: dict.h:87
int n_segments
Definition: hls.c:108
int den
denominator
Definition: rational.h:45
void avformat_close_input(AVFormatContext **s)
Close an opened input AVFormatContext.
Definition: utils.c:3728
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:636
static int hls_probe(AVProbeData *p)
Definition: hls.c:1997
static int ensure_playlist(HLSContext *c, struct playlist **pls, const char *url)
Definition: hls.c:571
static int hls_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: hls.c:1917
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:689
#define av_free(p)
int id3_found
Definition: hls.c:133
char name[MAX_FIELD_LEN]
Definition: hls.c:165
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:1050
char * value
Definition: dict.h:88
int eof_reached
true if eof reached
Definition: avio.h:139
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:1313
AVBufferRef * buf
Definition: id3v2.h:70
AVFormatContext * ctx
Definition: hls.c:100
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:405
struct playlist ** playlists
Definition: hls.c:174
Definition: hls.c:169
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1432
char video[MAX_FIELD_LEN]
Definition: hls.c:315
int64_t duration
Duration of the stream, in AV_TIME_BASE fractional seconds.
Definition: avformat.h:1380
#define av_freep(p)
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:640
#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:72
unbuffered private I/O API
char uri[MAX_URL_SIZE]
Definition: hls.c:385
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:303
int start_seq_no
Definition: hls.c:107
int stream_index
Definition: avcodec.h:1435
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:896
static void free_init_section_list(struct playlist *pls)
Definition: hls.c:224
int64_t duration
Definition: hls.c:69
static void free_variant_list(HLSContext *c)
Definition: hls.c:263
int cur_seq_no
Definition: hls.c:111
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:919
char key_url[MAX_URL_SIZE]
Definition: hls.c:122
static int hls_close(AVFormatContext *s)
Definition: hls.c:1904
char * ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase)
Definition: utils.c:4044
This structure stores compressed data.
Definition: avcodec.h:1410
int av_opt_set(void *obj, const char *name, const char *val, int search_flags)
Definition: opt.c:369
int ffurl_read(URLContext *h, unsigned char *buf, int size)
Read up to size bytes from the resource accessed by h, and store the read bytes in buf...
Definition: avio.c:360
Definition: hls.c:63
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:252
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1426
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:946
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:240
#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 2 integers modulo mod.
Definition: mathematics.c:165
const char * name
Definition: opengl_enc.c:103
static int select_cur_seq_no(HLSContext *c, struct playlist *pls)
Definition: hls.c:1468