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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  if (has_iv) {
810  memcpy(seg->iv, iv, sizeof(iv));
811  } else {
812  int seq = pls->start_seq_no + pls->n_segments;
813  memset(seg->iv, 0, sizeof(seg->iv));
814  AV_WB32(seg->iv + 12, seq);
815  }
816 
817  if (key_type != KEY_NONE) {
818  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, key);
819  seg->key = av_strdup(tmp_str);
820  if (!seg->key) {
821  av_free(seg);
822  ret = AVERROR(ENOMEM);
823  goto fail;
824  }
825  } else {
826  seg->key = NULL;
827  }
828 
829  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, line);
830  seg->url = av_strdup(tmp_str);
831  if (!seg->url) {
832  av_free(seg->key);
833  av_free(seg);
834  ret = AVERROR(ENOMEM);
835  goto fail;
836  }
837 
838  if (duration < 0.001 * AV_TIME_BASE) {
839  duration = 0.001 * AV_TIME_BASE;
840  }
841  seg->duration = duration;
842  seg->key_type = key_type;
843  dynarray_add(&pls->segments, &pls->n_segments, seg);
844  is_segment = 0;
845 
846  seg->size = seg_size;
847  if (seg_size >= 0) {
848  seg->url_offset = seg_offset;
849  seg_offset += seg_size;
850  seg_size = -1;
851  } else {
852  seg->url_offset = 0;
853  seg_offset = 0;
854  }
855 
856  seg->init_section = cur_init_section;
857  }
858  }
859  }
860  if (pls)
862 
863 fail:
864  av_free(new_url);
865  if (close_in)
866  avio_close(in);
867  return ret;
868 }
869 
870 static struct segment *current_segment(struct playlist *pls)
871 {
872  return pls->segments[pls->cur_seq_no - pls->start_seq_no];
873 }
874 
878 };
879 
880 /* read from URLContext, limiting read to current segment */
881 static int read_from_url(struct playlist *pls, struct segment *seg,
882  uint8_t *buf, int buf_size,
883  enum ReadFromURLMode mode)
884 {
885  int ret;
886 
887  /* limit read if the segment was only a part of a file */
888  if (seg->size >= 0)
889  buf_size = FFMIN(buf_size, seg->size - pls->cur_seg_offset);
890 
891  if (mode == READ_COMPLETE)
892  ret = ffurl_read_complete(pls->input, buf, buf_size);
893  else
894  ret = ffurl_read(pls->input, buf, buf_size);
895 
896  if (ret > 0)
897  pls->cur_seg_offset += ret;
898 
899  return ret;
900 }
901 
902 /* Parse the raw ID3 data and pass contents to caller */
904  AVDictionary **metadata, int64_t *dts,
905  ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta **extra_meta)
906 {
907  static const char id3_priv_owner_ts[] = "com.apple.streaming.transportStreamTimestamp";
908  ID3v2ExtraMeta *meta;
909 
910  ff_id3v2_read_dict(pb, metadata, ID3v2_DEFAULT_MAGIC, extra_meta);
911  for (meta = *extra_meta; meta; meta = meta->next) {
912  if (!strcmp(meta->tag, "PRIV")) {
913  ID3v2ExtraMetaPRIV *priv = meta->data;
914  if (priv->datasize == 8 && !strcmp(priv->owner, id3_priv_owner_ts)) {
915  /* 33-bit MPEG timestamp */
916  int64_t ts = AV_RB64(priv->data);
917  av_log(s, AV_LOG_DEBUG, "HLS ID3 audio timestamp %"PRId64"\n", ts);
918  if ((ts & ~((1ULL << 33) - 1)) == 0)
919  *dts = ts;
920  else
921  av_log(s, AV_LOG_ERROR, "Invalid HLS ID3 audio timestamp %"PRId64"\n", ts);
922  }
923  } else if (!strcmp(meta->tag, "APIC") && apic)
924  *apic = meta->data;
925  }
926 }
927 
928 /* Check if the ID3 metadata contents have changed */
929 static int id3_has_changed_values(struct playlist *pls, AVDictionary *metadata,
930  ID3v2ExtraMetaAPIC *apic)
931 {
932  AVDictionaryEntry *entry = NULL;
933  AVDictionaryEntry *oldentry;
934  /* check that no keys have changed values */
935  while ((entry = av_dict_get(metadata, "", entry, AV_DICT_IGNORE_SUFFIX))) {
936  oldentry = av_dict_get(pls->id3_initial, entry->key, NULL, AV_DICT_MATCH_CASE);
937  if (!oldentry || strcmp(oldentry->value, entry->value) != 0)
938  return 1;
939  }
940 
941  /* check if apic appeared */
942  if (apic && (pls->ctx->nb_streams != 2 || !pls->ctx->streams[1]->attached_pic.data))
943  return 1;
944 
945  if (apic) {
946  int size = pls->ctx->streams[1]->attached_pic.size;
947  if (size != apic->buf->size - AV_INPUT_BUFFER_PADDING_SIZE)
948  return 1;
949 
950  if (memcmp(apic->buf->data, pls->ctx->streams[1]->attached_pic.data, size) != 0)
951  return 1;
952  }
953 
954  return 0;
955 }
956 
957 /* Parse ID3 data and handle the found data */
958 static void handle_id3(AVIOContext *pb, struct playlist *pls)
959 {
960  AVDictionary *metadata = NULL;
961  ID3v2ExtraMetaAPIC *apic = NULL;
962  ID3v2ExtraMeta *extra_meta = NULL;
963  int64_t timestamp = AV_NOPTS_VALUE;
964 
965  parse_id3(pls->ctx, pb, &metadata, &timestamp, &apic, &extra_meta);
966 
967  if (timestamp != AV_NOPTS_VALUE) {
968  pls->id3_mpegts_timestamp = timestamp;
969  pls->id3_offset = 0;
970  }
971 
972  if (!pls->id3_found) {
973  /* initial ID3 tags */
975  pls->id3_found = 1;
976 
977  /* get picture attachment and set text metadata */
978  if (pls->ctx->nb_streams)
979  ff_id3v2_parse_apic(pls->ctx, &extra_meta);
980  else
981  /* demuxer not yet opened, defer picture attachment */
982  pls->id3_deferred_extra = extra_meta;
983 
984  av_dict_copy(&pls->ctx->metadata, metadata, 0);
985  pls->id3_initial = metadata;
986 
987  } else {
988  if (!pls->id3_changed && id3_has_changed_values(pls, metadata, apic)) {
989  avpriv_report_missing_feature(pls->ctx, "Changing ID3 metadata in HLS audio elementary stream");
990  pls->id3_changed = 1;
991  }
992  av_dict_free(&metadata);
993  }
994 
995  if (!pls->id3_deferred_extra)
996  ff_id3v2_free_extra_meta(&extra_meta);
997 }
998 
999 /* Intercept and handle ID3 tags between URLContext and AVIOContext */
1000 static void intercept_id3(struct playlist *pls, uint8_t *buf,
1001  int buf_size, int *len)
1002 {
1003  /* intercept id3 tags, we do not want to pass them to the raw
1004  * demuxer on all segment switches */
1005  int bytes;
1006  int id3_buf_pos = 0;
1007  int fill_buf = 0;
1008  struct segment *seg = current_segment(pls);
1009 
1010  /* gather all the id3 tags */
1011  while (1) {
1012  /* see if we can retrieve enough data for ID3 header */
1013  if (*len < ID3v2_HEADER_SIZE && buf_size >= ID3v2_HEADER_SIZE) {
1014  bytes = read_from_url(pls, seg, buf + *len, ID3v2_HEADER_SIZE - *len, READ_COMPLETE);
1015  if (bytes > 0) {
1016 
1017  if (bytes == ID3v2_HEADER_SIZE - *len)
1018  /* no EOF yet, so fill the caller buffer again after
1019  * we have stripped the ID3 tags */
1020  fill_buf = 1;
1021 
1022  *len += bytes;
1023 
1024  } else if (*len <= 0) {
1025  /* error/EOF */
1026  *len = bytes;
1027  fill_buf = 0;
1028  }
1029  }
1030 
1031  if (*len < ID3v2_HEADER_SIZE)
1032  break;
1033 
1034  if (ff_id3v2_match(buf, ID3v2_DEFAULT_MAGIC)) {
1035  int64_t maxsize = seg->size >= 0 ? seg->size : 1024*1024;
1036  int taglen = ff_id3v2_tag_len(buf);
1037  int tag_got_bytes = FFMIN(taglen, *len);
1038  int remaining = taglen - tag_got_bytes;
1039 
1040  if (taglen > maxsize) {
1041  av_log(pls->ctx, AV_LOG_ERROR, "Too large HLS ID3 tag (%d > %"PRId64" bytes)\n",
1042  taglen, maxsize);
1043  break;
1044  }
1045 
1046  /*
1047  * Copy the id3 tag to our temporary id3 buffer.
1048  * We could read a small id3 tag directly without memcpy, but
1049  * we would still need to copy the large tags, and handling
1050  * both of those cases together with the possibility for multiple
1051  * tags would make the handling a bit complex.
1052  */
1053  pls->id3_buf = av_fast_realloc(pls->id3_buf, &pls->id3_buf_size, id3_buf_pos + taglen);
1054  if (!pls->id3_buf)
1055  break;
1056  memcpy(pls->id3_buf + id3_buf_pos, buf, tag_got_bytes);
1057  id3_buf_pos += tag_got_bytes;
1058 
1059  /* strip the intercepted bytes */
1060  *len -= tag_got_bytes;
1061  memmove(buf, buf + tag_got_bytes, *len);
1062  av_log(pls->ctx, AV_LOG_DEBUG, "Stripped %d HLS ID3 bytes\n", tag_got_bytes);
1063 
1064  if (remaining > 0) {
1065  /* read the rest of the tag in */
1066  if (read_from_url(pls, seg, pls->id3_buf + id3_buf_pos, remaining, READ_COMPLETE) != remaining)
1067  break;
1068  id3_buf_pos += remaining;
1069  av_log(pls->ctx, AV_LOG_DEBUG, "Stripped additional %d HLS ID3 bytes\n", remaining);
1070  }
1071 
1072  } else {
1073  /* no more ID3 tags */
1074  break;
1075  }
1076  }
1077 
1078  /* re-fill buffer for the caller unless EOF */
1079  if (*len >= 0 && (fill_buf || *len == 0)) {
1080  bytes = read_from_url(pls, seg, buf + *len, buf_size - *len, READ_NORMAL);
1081 
1082  /* ignore error if we already had some data */
1083  if (bytes >= 0)
1084  *len += bytes;
1085  else if (*len == 0)
1086  *len = bytes;
1087  }
1088 
1089  if (pls->id3_buf) {
1090  /* Now parse all the ID3 tags */
1091  AVIOContext id3ioctx;
1092  ffio_init_context(&id3ioctx, pls->id3_buf, id3_buf_pos, 0, NULL, NULL, NULL, NULL);
1093  handle_id3(&id3ioctx, pls);
1094  }
1095 
1096  if (pls->is_id3_timestamped == -1)
1098 }
1099 
1100 static int open_input(HLSContext *c, struct playlist *pls, struct segment *seg)
1101 {
1102  AVDictionary *opts = NULL;
1103  int ret;
1104 
1105  // broker prior HTTP options that should be consistent across requests
1106  av_dict_set(&opts, "user-agent", c->user_agent, 0);
1107  av_dict_set(&opts, "cookies", c->cookies, 0);
1108  av_dict_set(&opts, "headers", c->headers, 0);
1109  av_dict_set(&opts, "seekable", "0", 0);
1110 
1111  if (seg->size >= 0) {
1112  /* try to restrict the HTTP request to the part we want
1113  * (if this is in fact a HTTP request) */
1114  av_dict_set_int(&opts, "offset", seg->url_offset, 0);
1115  av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
1116  }
1117 
1118  av_log(pls->parent, AV_LOG_VERBOSE, "HLS request for url '%s', offset %"PRId64", playlist %d\n",
1119  seg->url, seg->url_offset, pls->index);
1120 
1121  if (seg->key_type == KEY_NONE) {
1122  ret = open_url(pls->parent->priv_data, &pls->input, seg->url, opts);
1123  } else if (seg->key_type == KEY_AES_128) {
1124 // HLSContext *c = var->parent->priv_data;
1125  char iv[33], key[33], url[MAX_URL_SIZE];
1126  if (strcmp(seg->key, pls->key_url)) {
1127  URLContext *uc;
1128  if (open_url(pls->parent->priv_data, &uc, seg->key, opts) == 0) {
1129  if (ffurl_read_complete(uc, pls->key, sizeof(pls->key))
1130  != sizeof(pls->key)) {
1131  av_log(NULL, AV_LOG_ERROR, "Unable to read key file %s\n",
1132  seg->key);
1133  }
1134  ffurl_close(uc);
1135  } else {
1136  av_log(NULL, AV_LOG_ERROR, "Unable to open key file %s\n",
1137  seg->key);
1138  }
1139  av_strlcpy(pls->key_url, seg->key, sizeof(pls->key_url));
1140  }
1141  ff_data_to_hex(iv, seg->iv, sizeof(seg->iv), 0);
1142  ff_data_to_hex(key, pls->key, sizeof(pls->key), 0);
1143  iv[32] = key[32] = '\0';
1144  if (strstr(seg->url, "://"))
1145  snprintf(url, sizeof(url), "crypto+%s", seg->url);
1146  else
1147  snprintf(url, sizeof(url), "crypto:%s", seg->url);
1148 
1149  if ((ret = ffurl_alloc(&pls->input, url, AVIO_FLAG_READ,
1150  &pls->parent->interrupt_callback)) < 0)
1151  goto cleanup;
1152  av_opt_set(pls->input->priv_data, "key", key, 0);
1153  av_opt_set(pls->input->priv_data, "iv", iv, 0);
1154 
1155  if ((ret = url_connect(pls, c->avio_opts, opts)) < 0) {
1156  goto cleanup;
1157  }
1158  ret = 0;
1159  } else if (seg->key_type == KEY_SAMPLE_AES) {
1160  av_log(pls->parent, AV_LOG_ERROR,
1161  "SAMPLE-AES encryption is not supported yet\n");
1162  ret = AVERROR_PATCHWELCOME;
1163  }
1164  else
1165  ret = AVERROR(ENOSYS);
1166 
1167  /* Seek to the requested position. If this was a HTTP request, the offset
1168  * should already be where want it to, but this allows e.g. local testing
1169  * without a HTTP server. */
1170  if (ret == 0 && seg->key_type == KEY_NONE && seg->url_offset) {
1171  int seekret = ffurl_seek(pls->input, seg->url_offset, SEEK_SET);
1172  if (seekret < 0) {
1173  av_log(pls->parent, AV_LOG_ERROR, "Unable to seek to offset %"PRId64" of HLS segment '%s'\n", seg->url_offset, seg->url);
1174  ret = seekret;
1175  ffurl_close(pls->input);
1176  pls->input = NULL;
1177  }
1178  }
1179 
1180 cleanup:
1181  av_dict_free(&opts);
1182  pls->cur_seg_offset = 0;
1183  return ret;
1184 }
1185 
1186 static int update_init_section(struct playlist *pls, struct segment *seg)
1187 {
1188  static const int max_init_section_size = 1024*1024;
1189  HLSContext *c = pls->parent->priv_data;
1190  int64_t sec_size;
1191  int64_t urlsize;
1192  int ret;
1193 
1194  if (seg->init_section == pls->cur_init_section)
1195  return 0;
1196 
1197  pls->cur_init_section = NULL;
1198 
1199  if (!seg->init_section)
1200  return 0;
1201 
1202  /* this will clobber playlist URLContext stuff, so this should be
1203  * called between segments only */
1204  ret = open_input(c, pls, seg->init_section);
1205  if (ret < 0) {
1207  "Failed to open an initialization section in playlist %d\n",
1208  pls->index);
1209  return ret;
1210  }
1211 
1212  if (seg->init_section->size >= 0)
1213  sec_size = seg->init_section->size;
1214  else if ((urlsize = ffurl_size(pls->input)) >= 0)
1215  sec_size = urlsize;
1216  else
1217  sec_size = max_init_section_size;
1218 
1219  av_log(pls->parent, AV_LOG_DEBUG,
1220  "Downloading an initialization section of size %"PRId64"\n",
1221  sec_size);
1222 
1223  sec_size = FFMIN(sec_size, max_init_section_size);
1224 
1225  av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size);
1226 
1227  ret = read_from_url(pls, seg->init_section, pls->init_sec_buf,
1229  ffurl_close(pls->input);
1230  pls->input = NULL;
1231 
1232  if (ret < 0)
1233  return ret;
1234 
1235  pls->cur_init_section = seg->init_section;
1236  pls->init_sec_data_len = ret;
1237  pls->init_sec_buf_read_offset = 0;
1238 
1239  /* spec says audio elementary streams do not have media initialization
1240  * sections, so there should be no ID3 timestamps */
1241  pls->is_id3_timestamped = 0;
1242 
1243  return 0;
1244 }
1245 
1246 static int64_t default_reload_interval(struct playlist *pls)
1247 {
1248  return pls->n_segments > 0 ?
1249  pls->segments[pls->n_segments - 1]->duration :
1250  pls->target_duration;
1251 }
1252 
1253 static int read_data(void *opaque, uint8_t *buf, int buf_size)
1254 {
1255  struct playlist *v = opaque;
1256  HLSContext *c = v->parent->priv_data;
1257  int ret, i;
1258  int just_opened = 0;
1259  int reload_count = 0;
1260 
1261 restart:
1262  if (!v->needed)
1263  return AVERROR_EOF;
1264 
1265  if (!v->input) {
1266  int64_t reload_interval;
1267  struct segment *seg;
1268 
1269  /* Check that the playlist is still needed before opening a new
1270  * segment. */
1271  if (v->ctx && v->ctx->nb_streams &&
1272  v->parent->nb_streams >= v->stream_offset + v->ctx->nb_streams) {
1273  v->needed = 0;
1274  for (i = v->stream_offset; i < v->stream_offset + v->ctx->nb_streams;
1275  i++) {
1276  if (v->parent->streams[i]->discard < AVDISCARD_ALL)
1277  v->needed = 1;
1278  }
1279  }
1280  if (!v->needed) {
1281  av_log(v->parent, AV_LOG_INFO, "No longer receiving playlist %d\n",
1282  v->index);
1283  return AVERROR_EOF;
1284  }
1285 
1286  /* If this is a live stream and the reload interval has elapsed since
1287  * the last playlist reload, reload the playlists now. */
1288  reload_interval = default_reload_interval(v);
1289 
1290 reload:
1291  reload_count++;
1292  if (reload_count > c->max_reload)
1293  return AVERROR_EOF;
1294  if (!v->finished &&
1295  av_gettime_relative() - v->last_load_time >= reload_interval) {
1296  if ((ret = parse_playlist(c, v->url, v, NULL)) < 0) {
1297  av_log(v->parent, AV_LOG_WARNING, "Failed to reload playlist %d\n",
1298  v->index);
1299  return ret;
1300  }
1301  /* If we need to reload the playlist again below (if
1302  * there's still no more segments), switch to a reload
1303  * interval of half the target duration. */
1304  reload_interval = v->target_duration / 2;
1305  }
1306  if (v->cur_seq_no < v->start_seq_no) {
1308  "skipping %d segments ahead, expired from playlists\n",
1309  v->start_seq_no - v->cur_seq_no);
1310  v->cur_seq_no = v->start_seq_no;
1311  }
1312  if (v->cur_seq_no >= v->start_seq_no + v->n_segments) {
1313  if (v->finished)
1314  return AVERROR_EOF;
1315  while (av_gettime_relative() - v->last_load_time < reload_interval) {
1317  return AVERROR_EXIT;
1318  av_usleep(100*1000);
1319  }
1320  /* Enough time has elapsed since the last reload */
1321  goto reload;
1322  }
1323 
1324  seg = current_segment(v);
1325 
1326  /* load/update Media Initialization Section, if any */
1327  ret = update_init_section(v, seg);
1328  if (ret)
1329  return ret;
1330 
1331  ret = open_input(c, v, seg);
1332  if (ret < 0) {
1334  return AVERROR_EXIT;
1335  av_log(v->parent, AV_LOG_WARNING, "Failed to open segment of playlist %d\n",
1336  v->index);
1337  v->cur_seq_no += 1;
1338  goto reload;
1339  }
1340  just_opened = 1;
1341  }
1342 
1344  /* Push init section out first before first actual segment */
1345  int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size);
1346  memcpy(buf, v->init_sec_buf, copy_size);
1347  v->init_sec_buf_read_offset += copy_size;
1348  return copy_size;
1349  }
1350 
1351  ret = read_from_url(v, current_segment(v), buf, buf_size, READ_NORMAL);
1352  if (ret > 0) {
1353  if (just_opened && v->is_id3_timestamped != 0) {
1354  /* Intercept ID3 tags here, elementary audio streams are required
1355  * to convey timestamps using them in the beginning of each segment. */
1356  intercept_id3(v, buf, buf_size, &ret);
1357  }
1358 
1359  return ret;
1360  }
1361  ffurl_close(v->input);
1362  v->input = NULL;
1363  v->cur_seq_no++;
1364 
1365  c->cur_seq_no = v->cur_seq_no;
1366 
1367  goto restart;
1368 }
1369 
1371 {
1372  int variant_count = 0;
1373  int i, j;
1374 
1375  for (i = 0; i < c->n_variants && variant_count < 2; i++) {
1376  struct variant *v = c->variants[i];
1377 
1378  for (j = 0; j < v->n_playlists; j++) {
1379  if (v->playlists[j] == pls) {
1380  variant_count++;
1381  break;
1382  }
1383  }
1384  }
1385 
1386  return variant_count >= 2;
1387 }
1388 
1389 static void add_renditions_to_variant(HLSContext *c, struct variant *var,
1390  enum AVMediaType type, const char *group_id)
1391 {
1392  int i;
1393 
1394  for (i = 0; i < c->n_renditions; i++) {
1395  struct rendition *rend = c->renditions[i];
1396 
1397  if (rend->type == type && !strcmp(rend->group_id, group_id)) {
1398 
1399  if (rend->playlist)
1400  /* rendition is an external playlist
1401  * => add the playlist to the variant */
1402  dynarray_add(&var->playlists, &var->n_playlists, rend->playlist);
1403  else
1404  /* rendition is part of the variant main Media Playlist
1405  * => add the rendition to the main Media Playlist */
1406  dynarray_add(&var->playlists[0]->renditions,
1407  &var->playlists[0]->n_renditions,
1408  rend);
1409  }
1410  }
1411 }
1412 
1414  enum AVMediaType type)
1415 {
1416  int rend_idx = 0;
1417  int i;
1418 
1419  for (i = 0; i < pls->ctx->nb_streams; i++) {
1420  AVStream *st = s->streams[pls->stream_offset + i];
1421 
1422  if (st->codec->codec_type != type)
1423  continue;
1424 
1425  for (; rend_idx < pls->n_renditions; rend_idx++) {
1426  struct rendition *rend = pls->renditions[rend_idx];
1427 
1428  if (rend->type != type)
1429  continue;
1430 
1431  if (rend->language[0])
1432  av_dict_set(&st->metadata, "language", rend->language, 0);
1433  if (rend->name[0])
1434  av_dict_set(&st->metadata, "comment", rend->name, 0);
1435 
1436  st->disposition |= rend->disposition;
1437  }
1438  if (rend_idx >=pls->n_renditions)
1439  break;
1440  }
1441 }
1442 
1443 /* if timestamp was in valid range: returns 1 and sets seq_no
1444  * if not: returns 0 and sets seq_no to closest segment */
1446  int64_t timestamp, int *seq_no)
1447 {
1448  int i;
1449  int64_t pos = c->first_timestamp == AV_NOPTS_VALUE ?
1450  0 : c->first_timestamp;
1451 
1452  if (timestamp < pos) {
1453  *seq_no = pls->start_seq_no;
1454  return 0;
1455  }
1456 
1457  for (i = 0; i < pls->n_segments; i++) {
1458  int64_t diff = pos + pls->segments[i]->duration - timestamp;
1459  if (diff > 0) {
1460  *seq_no = pls->start_seq_no + i;
1461  return 1;
1462  }
1463  pos += pls->segments[i]->duration;
1464  }
1465 
1466  *seq_no = pls->start_seq_no + pls->n_segments - 1;
1467 
1468  return 0;
1469 }
1470 
1471 static int select_cur_seq_no(HLSContext *c, struct playlist *pls)
1472 {
1473  int seq_no;
1474 
1475  if (!pls->finished && !c->first_packet &&
1477  /* reload the playlist since it was suspended */
1478  parse_playlist(c, pls->url, pls, NULL);
1479 
1480  /* If playback is already in progress (we are just selecting a new
1481  * playlist) and this is a complete file, find the matching segment
1482  * by counting durations. */
1483  if (pls->finished && c->cur_timestamp != AV_NOPTS_VALUE) {
1484  find_timestamp_in_playlist(c, pls, c->cur_timestamp, &seq_no);
1485  return seq_no;
1486  }
1487 
1488  if (!pls->finished) {
1489  if (!c->first_packet && /* we are doing a segment selection during playback */
1490  c->cur_seq_no >= pls->start_seq_no &&
1491  c->cur_seq_no < pls->start_seq_no + pls->n_segments)
1492  /* While spec 3.4.3 says that we cannot assume anything about the
1493  * content at the same sequence number on different playlists,
1494  * in practice this seems to work and doing it otherwise would
1495  * require us to download a segment to inspect its timestamps. */
1496  return c->cur_seq_no;
1497 
1498  /* If this is a live stream, start live_start_index segments from the
1499  * start or end */
1500  if (c->live_start_index < 0)
1501  return pls->start_seq_no + FFMAX(pls->n_segments + c->live_start_index, 0);
1502  else
1503  return pls->start_seq_no + FFMIN(c->live_start_index, pls->n_segments - 1);
1504  }
1505 
1506  /* Otherwise just start on the first segment. */
1507  return pls->start_seq_no;
1508 }
1509 
1511 {
1512  HLSContext *c = s->priv_data;
1513  const char *opts[] = { "headers", "user_agent", "user-agent", "cookies", NULL }, **opt = opts;
1514  uint8_t *buf;
1515  int ret = 0;
1516 
1517  while (*opt) {
1518  if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN, &buf) >= 0) {
1519  ret = av_dict_set(&c->avio_opts, *opt, buf,
1521  if (ret < 0)
1522  return ret;
1523  }
1524  opt++;
1525  }
1526 
1527  return ret;
1528 }
1529 
1531 {
1532  URLContext *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb->opaque;
1533  HLSContext *c = s->priv_data;
1534  int ret = 0, i, j, stream_offset = 0;
1535 
1536  c->interrupt_callback = &s->interrupt_callback;
1537 
1538  c->first_packet = 1;
1539  c->first_timestamp = AV_NOPTS_VALUE;
1540  c->cur_timestamp = AV_NOPTS_VALUE;
1541 
1542  // if the URL context is good, read important options we must broker later
1543  if (u && u->prot->priv_data_class) {
1544  // get the previous user agent & set back to null if string size is zero
1545  update_options(&c->user_agent, "user-agent", u->priv_data);
1546 
1547  // get the previous cookies & set back to null if string size is zero
1548  update_options(&c->cookies, "cookies", u->priv_data);
1549 
1550  // get the previous headers & set back to null if string size is zero
1551  update_options(&c->headers, "headers", u->priv_data);
1552  }
1553 
1554  if ((ret = parse_playlist(c, s->filename, NULL, s->pb)) < 0)
1555  goto fail;
1556 
1557  if ((ret = save_avio_options(s)) < 0)
1558  goto fail;
1559 
1560  /* Some HLS servers don't like being sent the range header */
1561  av_dict_set(&c->avio_opts, "seekable", "0", 0);
1562 
1563  if (c->n_variants == 0) {
1564  av_log(NULL, AV_LOG_WARNING, "Empty playlist\n");
1565  ret = AVERROR_EOF;
1566  goto fail;
1567  }
1568  /* If the playlist only contained playlists (Master Playlist),
1569  * parse each individual playlist. */
1570  if (c->n_playlists > 1 || c->playlists[0]->n_segments == 0) {
1571  for (i = 0; i < c->n_playlists; i++) {
1572  struct playlist *pls = c->playlists[i];
1573  if ((ret = parse_playlist(c, pls->url, pls, NULL)) < 0)
1574  goto fail;
1575  }
1576  }
1577 
1578  if (c->variants[0]->playlists[0]->n_segments == 0) {
1579  av_log(NULL, AV_LOG_WARNING, "Empty playlist\n");
1580  ret = AVERROR_EOF;
1581  goto fail;
1582  }
1583 
1584  /* If this isn't a live stream, calculate the total duration of the
1585  * stream. */
1586  if (c->variants[0]->playlists[0]->finished) {
1587  int64_t duration = 0;
1588  for (i = 0; i < c->variants[0]->playlists[0]->n_segments; i++)
1589  duration += c->variants[0]->playlists[0]->segments[i]->duration;
1590  s->duration = duration;
1591  }
1592 
1593  /* Associate renditions with variants */
1594  for (i = 0; i < c->n_variants; i++) {
1595  struct variant *var = c->variants[i];
1596 
1597  if (var->audio_group[0])
1599  if (var->video_group[0])
1601  if (var->subtitles_group[0])
1603  }
1604 
1605  /* Open the demuxer for each playlist */
1606  for (i = 0; i < c->n_playlists; i++) {
1607  struct playlist *pls = c->playlists[i];
1608  AVInputFormat *in_fmt = NULL;
1609  char *url;
1610 
1611  if (!(pls->ctx = avformat_alloc_context())) {
1612  ret = AVERROR(ENOMEM);
1613  goto fail;
1614  }
1615 
1616  if (pls->n_segments == 0)
1617  continue;
1618 
1619  pls->index = i;
1620  pls->needed = 1;
1621  pls->parent = s;
1622  pls->cur_seq_no = select_cur_seq_no(c, pls);
1623 
1625  if (!pls->read_buffer){
1626  ret = AVERROR(ENOMEM);
1627  avformat_free_context(pls->ctx);
1628  pls->ctx = NULL;
1629  goto fail;
1630  }
1631  ffio_init_context(&pls->pb, pls->read_buffer, INITIAL_BUFFER_SIZE, 0, pls,
1632  read_data, NULL, NULL);
1633  pls->pb.seekable = 0;
1634  url = av_strdup(pls->segments[0]->url);
1635  ret = av_probe_input_buffer(&pls->pb, &in_fmt, url, NULL, 0, 0);
1636  av_free(url);
1637  if (ret < 0) {
1638  /* Free the ctx - it isn't initialized properly at this point,
1639  * so avformat_close_input shouldn't be called. If
1640  * avformat_open_input fails below, it frees and zeros the
1641  * context, so it doesn't need any special treatment like this. */
1642  av_log(s, AV_LOG_ERROR, "Error when loading first segment '%s'\n", pls->segments[0]->url);
1643  avformat_free_context(pls->ctx);
1644  pls->ctx = NULL;
1645  goto fail;
1646  }
1647  pls->ctx->pb = &pls->pb;
1649 
1650  if ((ret = ff_copy_whitelists(pls->ctx, s)) < 0)
1651  goto fail;
1652 
1653  ret = avformat_open_input(&pls->ctx, pls->segments[0]->url, in_fmt, NULL);
1654  if (ret < 0)
1655  goto fail;
1656 
1657  if (pls->id3_deferred_extra && pls->ctx->nb_streams == 1) {
1661  pls->id3_deferred_extra = NULL;
1662  }
1663 
1664  pls->ctx->ctx_flags &= ~AVFMTCTX_NOHEADER;
1665  ret = avformat_find_stream_info(pls->ctx, NULL);
1666  if (ret < 0)
1667  goto fail;
1668 
1669  if (pls->is_id3_timestamped == -1)
1670  av_log(s, AV_LOG_WARNING, "No expected HTTP requests have been made\n");
1671 
1672  /* Create new AVStreams for each stream in this playlist */
1673  for (j = 0; j < pls->ctx->nb_streams; j++) {
1674  AVStream *st = avformat_new_stream(s, NULL);
1675  AVStream *ist = pls->ctx->streams[j];
1676  if (!st) {
1677  ret = AVERROR(ENOMEM);
1678  goto fail;
1679  }
1680  st->id = i;
1681 
1682  avcodec_copy_context(st->codec, pls->ctx->streams[j]->codec);
1683 
1684  if (pls->is_id3_timestamped) /* custom timestamps via id3 */
1685  avpriv_set_pts_info(st, 33, 1, MPEG_TIME_BASE);
1686  else
1688  }
1689 
1693 
1694  stream_offset += pls->ctx->nb_streams;
1695  }
1696 
1697  /* Create a program for each variant */
1698  for (i = 0; i < c->n_variants; i++) {
1699  struct variant *v = c->variants[i];
1700  AVProgram *program;
1701 
1702  program = av_new_program(s, i);
1703  if (!program)
1704  goto fail;
1705  av_dict_set_int(&program->metadata, "variant_bitrate", v->bandwidth, 0);
1706 
1707  for (j = 0; j < v->n_playlists; j++) {
1708  struct playlist *pls = v->playlists[j];
1709  int is_shared = playlist_in_multiple_variants(c, pls);
1710  int k;
1711 
1712  for (k = 0; k < pls->ctx->nb_streams; k++) {
1713  struct AVStream *st = s->streams[pls->stream_offset + k];
1714 
1716 
1717  /* Set variant_bitrate for streams unique to this variant */
1718  if (!is_shared && v->bandwidth)
1719  av_dict_set_int(&st->metadata, "variant_bitrate", v->bandwidth, 0);
1720  }
1721  }
1722  }
1723 
1724  return 0;
1725 fail:
1729  return ret;
1730 }
1731 
1732 static int recheck_discard_flags(AVFormatContext *s, int first)
1733 {
1734  HLSContext *c = s->priv_data;
1735  int i, changed = 0;
1736 
1737  /* Check if any new streams are needed */
1738  for (i = 0; i < c->n_playlists; i++)
1739  c->playlists[i]->cur_needed = 0;
1740 
1741  for (i = 0; i < s->nb_streams; i++) {
1742  AVStream *st = s->streams[i];
1743  struct playlist *pls = c->playlists[s->streams[i]->id];
1744  if (st->discard < AVDISCARD_ALL)
1745  pls->cur_needed = 1;
1746  }
1747  for (i = 0; i < c->n_playlists; i++) {
1748  struct playlist *pls = c->playlists[i];
1749  if (pls->cur_needed && !pls->needed) {
1750  pls->needed = 1;
1751  changed = 1;
1752  pls->cur_seq_no = select_cur_seq_no(c, pls);
1753  pls->pb.eof_reached = 0;
1754  if (c->cur_timestamp != AV_NOPTS_VALUE) {
1755  /* catch up */
1756  pls->seek_timestamp = c->cur_timestamp;
1757  pls->seek_flags = AVSEEK_FLAG_ANY;
1758  pls->seek_stream_index = -1;
1759  }
1760  av_log(s, AV_LOG_INFO, "Now receiving playlist %d, segment %d\n", i, pls->cur_seq_no);
1761  } else if (first && !pls->cur_needed && pls->needed) {
1762  if (pls->input)
1763  ffurl_close(pls->input);
1764  pls->input = NULL;
1765  pls->needed = 0;
1766  changed = 1;
1767  av_log(s, AV_LOG_INFO, "No longer receiving playlist %d\n", i);
1768  }
1769  }
1770  return changed;
1771 }
1772 
1774 {
1775  if (pls->id3_offset >= 0) {
1776  pls->pkt.dts = pls->id3_mpegts_timestamp +
1777  av_rescale_q(pls->id3_offset,
1778  pls->ctx->streams[pls->pkt.stream_index]->time_base,
1780  if (pls->pkt.duration)
1781  pls->id3_offset += pls->pkt.duration;
1782  else
1783  pls->id3_offset = -1;
1784  } else {
1785  /* there have been packets with unknown duration
1786  * since the last id3 tag, should not normally happen */
1787  pls->pkt.dts = AV_NOPTS_VALUE;
1788  }
1789 
1790  if (pls->pkt.duration)
1791  pls->pkt.duration = av_rescale_q(pls->pkt.duration,
1792  pls->ctx->streams[pls->pkt.stream_index]->time_base,
1794 
1795  pls->pkt.pts = AV_NOPTS_VALUE;
1796 }
1797 
1798 static AVRational get_timebase(struct playlist *pls)
1799 {
1800  if (pls->is_id3_timestamped)
1801  return MPEG_TIME_BASE_Q;
1802 
1803  return pls->ctx->streams[pls->pkt.stream_index]->time_base;
1804 }
1805 
1806 static int compare_ts_with_wrapdetect(int64_t ts_a, struct playlist *pls_a,
1807  int64_t ts_b, struct playlist *pls_b)
1808 {
1809  int64_t scaled_ts_a = av_rescale_q(ts_a, get_timebase(pls_a), MPEG_TIME_BASE_Q);
1810  int64_t scaled_ts_b = av_rescale_q(ts_b, get_timebase(pls_b), MPEG_TIME_BASE_Q);
1811 
1812  return av_compare_mod(scaled_ts_a, scaled_ts_b, 1LL << 33);
1813 }
1814 
1816 {
1817  HLSContext *c = s->priv_data;
1818  int ret, i, minplaylist = -1;
1819 
1821  c->first_packet = 0;
1822 
1823  for (i = 0; i < c->n_playlists; i++) {
1824  struct playlist *pls = c->playlists[i];
1825  /* Make sure we've got one buffered packet from each open playlist
1826  * stream */
1827  if (pls->needed && !pls->pkt.data) {
1828  while (1) {
1829  int64_t ts_diff;
1830  AVRational tb;
1831  ret = av_read_frame(pls->ctx, &pls->pkt);
1832  if (ret < 0) {
1833  if (!avio_feof(&pls->pb) && ret != AVERROR_EOF)
1834  return ret;
1835  reset_packet(&pls->pkt);
1836  break;
1837  } else {
1838  /* stream_index check prevents matching picture attachments etc. */
1839  if (pls->is_id3_timestamped && pls->pkt.stream_index == 0) {
1840  /* audio elementary streams are id3 timestamped */
1842  }
1843 
1844  if (c->first_timestamp == AV_NOPTS_VALUE &&
1845  pls->pkt.dts != AV_NOPTS_VALUE)
1846  c->first_timestamp = av_rescale_q(pls->pkt.dts,
1848  }
1849 
1850  if (pls->seek_timestamp == AV_NOPTS_VALUE)
1851  break;
1852 
1853  if (pls->seek_stream_index < 0 ||
1854  pls->seek_stream_index == pls->pkt.stream_index) {
1855 
1856  if (pls->pkt.dts == AV_NOPTS_VALUE) {
1858  break;
1859  }
1860 
1861  tb = get_timebase(pls);
1862  ts_diff = av_rescale_rnd(pls->pkt.dts, AV_TIME_BASE,
1863  tb.den, AV_ROUND_DOWN) -
1864  pls->seek_timestamp;
1865  if (ts_diff >= 0 && (pls->seek_flags & AVSEEK_FLAG_ANY ||
1866  pls->pkt.flags & AV_PKT_FLAG_KEY)) {
1868  break;
1869  }
1870  }
1871  av_free_packet(&pls->pkt);
1872  reset_packet(&pls->pkt);
1873  }
1874  }
1875  /* Check if this stream has the packet with the lowest dts */
1876  if (pls->pkt.data) {
1877  struct playlist *minpls = minplaylist < 0 ?
1878  NULL : c->playlists[minplaylist];
1879  if (minplaylist < 0) {
1880  minplaylist = i;
1881  } else {
1882  int64_t dts = pls->pkt.dts;
1883  int64_t mindts = minpls->pkt.dts;
1884 
1885  if (dts == AV_NOPTS_VALUE ||
1886  (mindts != AV_NOPTS_VALUE && compare_ts_with_wrapdetect(dts, pls, mindts, minpls) < 0))
1887  minplaylist = i;
1888  }
1889  }
1890  }
1891 
1892  /* If we got a packet, return it */
1893  if (minplaylist >= 0) {
1894  struct playlist *pls = c->playlists[minplaylist];
1895  *pkt = pls->pkt;
1896  pkt->stream_index += pls->stream_offset;
1897  reset_packet(&c->playlists[minplaylist]->pkt);
1898 
1899  if (pkt->dts != AV_NOPTS_VALUE)
1900  c->cur_timestamp = av_rescale_q(pkt->dts,
1901  pls->ctx->streams[pls->pkt.stream_index]->time_base,
1902  AV_TIME_BASE_Q);
1903 
1904  return 0;
1905  }
1906  return AVERROR_EOF;
1907 }
1908 
1910 {
1911  HLSContext *c = s->priv_data;
1912 
1913  free_playlist_list(c);
1914  free_variant_list(c);
1916 
1917  av_dict_free(&c->avio_opts);
1918 
1919  return 0;
1920 }
1921 
1922 static int hls_read_seek(AVFormatContext *s, int stream_index,
1923  int64_t timestamp, int flags)
1924 {
1925  HLSContext *c = s->priv_data;
1926  struct playlist *seek_pls = NULL;
1927  int i, seq_no;
1928  int64_t first_timestamp, seek_timestamp, duration;
1929 
1930  if ((flags & AVSEEK_FLAG_BYTE) ||
1931  !(c->variants[0]->playlists[0]->finished || c->variants[0]->playlists[0]->type == PLS_TYPE_EVENT))
1932  return AVERROR(ENOSYS);
1933 
1934  first_timestamp = c->first_timestamp == AV_NOPTS_VALUE ?
1935  0 : c->first_timestamp;
1936 
1937  seek_timestamp = av_rescale_rnd(timestamp, AV_TIME_BASE,
1938  s->streams[stream_index]->time_base.den,
1939  flags & AVSEEK_FLAG_BACKWARD ?
1941 
1942  duration = s->duration == AV_NOPTS_VALUE ?
1943  0 : s->duration;
1944 
1945  if (0 < duration && duration < seek_timestamp - first_timestamp)
1946  return AVERROR(EIO);
1947 
1948  /* find the playlist with the specified stream */
1949  for (i = 0; i < c->n_playlists; i++) {
1950  struct playlist *pls = c->playlists[i];
1951  if (stream_index >= pls->stream_offset &&
1952  stream_index - pls->stream_offset < pls->ctx->nb_streams) {
1953  seek_pls = pls;
1954  break;
1955  }
1956  }
1957  /* check if the timestamp is valid for the playlist with the
1958  * specified stream index */
1959  if (!seek_pls || !find_timestamp_in_playlist(c, seek_pls, seek_timestamp, &seq_no))
1960  return AVERROR(EIO);
1961 
1962  /* set segment now so we do not need to search again below */
1963  seek_pls->cur_seq_no = seq_no;
1964  seek_pls->seek_stream_index = stream_index - seek_pls->stream_offset;
1965 
1966  for (i = 0; i < c->n_playlists; i++) {
1967  /* Reset reading */
1968  struct playlist *pls = c->playlists[i];
1969  if (pls->input) {
1970  ffurl_close(pls->input);
1971  pls->input = NULL;
1972  }
1973  av_free_packet(&pls->pkt);
1974  reset_packet(&pls->pkt);
1975  pls->pb.eof_reached = 0;
1976  /* Clear any buffered data */
1977  pls->pb.buf_end = pls->pb.buf_ptr = pls->pb.buffer;
1978  /* Reset the pos, to let the mpegts demuxer know we've seeked. */
1979  pls->pb.pos = 0;
1980  /* Flush the packet queue of the subdemuxer. */
1981  ff_read_frame_flush(pls->ctx);
1982 
1984  pls->seek_flags = flags;
1985 
1986  if (pls != seek_pls) {
1987  /* set closest segment seq_no for playlists not handled above */
1988  find_timestamp_in_playlist(c, pls, seek_timestamp, &pls->cur_seq_no);
1989  /* seek the playlist to the given position without taking
1990  * keyframes into account since this playlist does not have the
1991  * specified stream where we should look for the keyframes */
1992  pls->seek_stream_index = -1;
1993  pls->seek_flags |= AVSEEK_FLAG_ANY;
1994  }
1995  }
1996 
1998 
1999  return 0;
2000 }
2001 
2002 static int hls_probe(AVProbeData *p)
2003 {
2004  /* Require #EXTM3U at the start, and either one of the ones below
2005  * somewhere for a proper match. */
2006  if (strncmp(p->buf, "#EXTM3U", 7))
2007  return 0;
2008  if (strstr(p->buf, "#EXT-X-STREAM-INF:") ||
2009  strstr(p->buf, "#EXT-X-TARGETDURATION:") ||
2010  strstr(p->buf, "#EXT-X-MEDIA-SEQUENCE:"))
2011  return AVPROBE_SCORE_MAX;
2012  return 0;
2013 }
2014 
2015 #define OFFSET(x) offsetof(HLSContext, x)
2016 #define FLAGS AV_OPT_FLAG_DECODING_PARAM
2017 static const AVOption hls_options[] = {
2018  {"live_start_index", "segment index to start live streams at (negative values are from the end)",
2019  OFFSET(live_start_index), AV_OPT_TYPE_INT, {.i64 = -3}, INT_MIN, INT_MAX, FLAGS},
2020  {"allowed_extensions", "List of file extensions that hls is allowed to access",
2021  OFFSET(allowed_extensions), AV_OPT_TYPE_STRING,
2022  {.str = "3gp,aac,avi,flac,mkv,m3u8,m4a,m4s,m4v,mpg,mov,mp2,mp3,mp4,mpeg,mpegts,ogg,ogv,oga,ts,vob,wav"},
2023  INT_MIN, INT_MAX, FLAGS},
2024  {"max_reload", "Maximum number of times a insufficient list is attempted to be reloaded",
2025  OFFSET(max_reload), AV_OPT_TYPE_INT, {.i64 = 1000}, 0, INT_MAX, FLAGS},
2026  {NULL}
2027 };
2028 
2029 static const AVClass hls_class = {
2030  .class_name = "hls,applehttp",
2031  .item_name = av_default_item_name,
2032  .option = hls_options,
2033  .version = LIBAVUTIL_VERSION_INT,
2034 };
2035 
2037  .name = "hls,applehttp",
2038  .long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
2039  .priv_class = &hls_class,
2040  .priv_data_size = sizeof(HLSContext),
2041  .read_probe = hls_probe,
2044  .read_close = hls_close,
2046 };
#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:1186
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:875
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:881
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:4098
#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:1246
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:1100
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:1080
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:929
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:1628
#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:2016
#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:331
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:1000
static struct playlist * new_playlist(HLSContext *c, const char *url, const char *base)
Definition: hls.c:294
AVInputFormat ff_hls_demuxer
Definition: hls.c:2036
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:3761
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:958
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:3832
static int read_data(void *opaque, uint8_t *buf, int buf_size)
Definition: hls.c:1253
#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:1413
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:1798
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:1806
#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:492
int64_t cur_timestamp
Definition: hls.c:194
int n_renditions
Definition: hls.c:145
static const AVClass hls_class
Definition: hls.c:2029
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:1064
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:1445
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:870
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:1389
uint8_t * init_sec_buf
Definition: hls.c:117
static int hls_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: hls.c:1815
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:1773
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:903
#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:2017
static int hls_read_header(AVFormatContext *s)
Definition: hls.c:1530
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:1510
#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:3698
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:4070
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1481
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:1732
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:4123
int64_t seek_timestamp
Definition: hls.c:137
char iv[35]
Definition: hls.c:366
#define OFFSET(x)
Definition: hls.c:2015
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:511
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:3103
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:1370
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:3733
#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:2002
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:1922
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:1052
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:1909
char * ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase)
Definition: utils.c:4049
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:1471