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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 "id3v2.h"
40 
41 #define INITIAL_BUFFER_SIZE 32768
42 
43 #define MAX_FIELD_LEN 64
44 #define MAX_CHARACTERISTICS_LEN 512
45 
46 #define MPEG_TIME_BASE 90000
47 #define MPEG_TIME_BASE_Q (AVRational){1, MPEG_TIME_BASE}
48 
49 /*
50  * An apple http stream consists of a playlist with media segment files,
51  * played sequentially. There may be several playlists with the same
52  * video content, in different bandwidth variants, that are played in
53  * parallel (preferably only one bandwidth variant at a time). In this case,
54  * the user supplied the url to a main playlist that only lists the variant
55  * playlists.
56  *
57  * If the main playlist doesn't point at any variants, we still create
58  * one anonymous toplevel variant for this, to maintain the structure.
59  */
60 
61 enum KeyType {
65 };
66 
67 struct segment {
68  int64_t duration;
69  int64_t url_offset;
70  int64_t size;
71  char *url;
72  char *key;
74  uint8_t iv[16];
75  /* associated Media Initialization Section, treated as a segment */
77 };
78 
79 struct rendition;
80 
85 };
86 
87 /*
88  * Each playlist has its own demuxer. If it currently is active,
89  * it has an open AVIOContext too, and potentially an AVPacket
90  * containing the next packet from this stream.
91  */
92 struct playlist {
98  int index;
102 
103  int finished;
108  struct segment **segments;
111  int64_t cur_seg_offset;
112  int64_t last_load_time;
113 
114  /* Currently active Media Initialization Section */
117  unsigned int init_sec_buf_size;
118  unsigned int init_sec_data_len;
120 
123 
124  /* ID3 timestamp handling (elementary audio streams have ID3 timestamps
125  * (and possibly other ID3 tags) in the beginning of each segment) */
126  int is_id3_timestamped; /* -1: not yet known */
127  int64_t id3_mpegts_timestamp; /* in mpegts tb */
128  int64_t id3_offset; /* in stream original tb */
129  uint8_t* id3_buf; /* temp buffer for id3 parsing */
130  unsigned int id3_buf_size;
131  AVDictionary *id3_initial; /* data from first id3 tag */
132  int id3_found; /* ID3 tag found at some point */
133  int id3_changed; /* ID3 tag data has changed at some point */
134  ID3v2ExtraMeta *id3_deferred_extra; /* stored here until subdemuxer is opened */
135 
136  int64_t seek_timestamp;
138  int seek_stream_index; /* into subdemuxer stream array */
139 
140  /* Renditions associated with this playlist, if any.
141  * Alternative rendition playlists have a single rendition associated
142  * with them, and variant main Media Playlists may have
143  * multiple (playlist-less) renditions associated with them. */
146 
147  /* Media Initialization Sections (EXT-X-MAP) associated with this
148  * playlist, if any. */
151 };
152 
153 /*
154  * Renditions are e.g. alternative subtitle or audio streams.
155  * The rendition may either be an external playlist or it may be
156  * contained in the main Media Playlist of the variant (in which case
157  * playlist is NULL).
158  */
159 struct rendition {
166 };
167 
168 struct variant {
170 
171  /* every variant contains at least the main Media Playlist in index 0 */
173  struct playlist **playlists;
174 
178 };
179 
180 typedef struct HLSContext {
181  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
199  char *http_proxy; ///< holds the address of the HTTP proxy server
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_packet_unref(&pls->pkt);
248  av_freep(&pls->pb.buffer);
249  if (pls->input)
250  ff_format_io_close(c->ctx, &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  av_freep(&c->headers);
261  av_freep(&c->http_proxy);
262  c->n_playlists = 0;
263 }
264 
266 {
267  int i;
268  for (i = 0; i < c->n_variants; i++) {
269  struct variant *var = c->variants[i];
270  av_freep(&var->playlists);
271  av_free(var);
272  }
273  av_freep(&c->variants);
274  c->n_variants = 0;
275 }
276 
278 {
279  int i;
280  for (i = 0; i < c->n_renditions; i++)
281  av_freep(&c->renditions[i]);
282  av_freep(&c->renditions);
283  c->n_renditions = 0;
284 }
285 
286 /*
287  * Used to reset a statically allocated AVPacket to a clean slate,
288  * containing no data.
289  */
290 static void reset_packet(AVPacket *pkt)
291 {
292  av_init_packet(pkt);
293  pkt->data = NULL;
294 }
295 
296 static struct playlist *new_playlist(HLSContext *c, const char *url,
297  const char *base)
298 {
299  struct playlist *pls = av_mallocz(sizeof(struct playlist));
300  if (!pls)
301  return NULL;
302  reset_packet(&pls->pkt);
303  ff_make_absolute_url(pls->url, sizeof(pls->url), base, url);
305 
306  pls->is_id3_timestamped = -1;
308 
309  dynarray_add(&c->playlists, &c->n_playlists, pls);
310  return pls;
311 }
312 
313 struct variant_info {
314  char bandwidth[20];
315  /* variant group ids: */
319 };
320 
321 static struct variant *new_variant(HLSContext *c, struct variant_info *info,
322  const char *url, const char *base)
323 {
324  struct variant *var;
325  struct playlist *pls;
326 
327  pls = new_playlist(c, url, base);
328  if (!pls)
329  return NULL;
330 
331  var = av_mallocz(sizeof(struct variant));
332  if (!var)
333  return NULL;
334 
335  if (info) {
336  var->bandwidth = atoi(info->bandwidth);
337  strcpy(var->audio_group, info->audio);
338  strcpy(var->video_group, info->video);
339  strcpy(var->subtitles_group, info->subtitles);
340  }
341 
342  dynarray_add(&c->variants, &c->n_variants, var);
343  dynarray_add(&var->playlists, &var->n_playlists, pls);
344  return var;
345 }
346 
347 static void handle_variant_args(struct variant_info *info, const char *key,
348  int key_len, char **dest, int *dest_len)
349 {
350  if (!strncmp(key, "BANDWIDTH=", key_len)) {
351  *dest = info->bandwidth;
352  *dest_len = sizeof(info->bandwidth);
353  } else if (!strncmp(key, "AUDIO=", key_len)) {
354  *dest = info->audio;
355  *dest_len = sizeof(info->audio);
356  } else if (!strncmp(key, "VIDEO=", key_len)) {
357  *dest = info->video;
358  *dest_len = sizeof(info->video);
359  } else if (!strncmp(key, "SUBTITLES=", key_len)) {
360  *dest = info->subtitles;
361  *dest_len = sizeof(info->subtitles);
362  }
363 }
364 
365 struct key_info {
367  char method[11];
368  char iv[35];
369 };
370 
371 static void handle_key_args(struct key_info *info, const char *key,
372  int key_len, char **dest, int *dest_len)
373 {
374  if (!strncmp(key, "METHOD=", key_len)) {
375  *dest = info->method;
376  *dest_len = sizeof(info->method);
377  } else if (!strncmp(key, "URI=", key_len)) {
378  *dest = info->uri;
379  *dest_len = sizeof(info->uri);
380  } else if (!strncmp(key, "IV=", key_len)) {
381  *dest = info->iv;
382  *dest_len = sizeof(info->iv);
383  }
384 }
385 
388  char byterange[32];
389 };
390 
391 static struct segment *new_init_section(struct playlist *pls,
392  struct init_section_info *info,
393  const char *url_base)
394 {
395  struct segment *sec;
396  char *ptr;
397  char tmp_str[MAX_URL_SIZE];
398 
399  if (!info->uri[0])
400  return NULL;
401 
402  sec = av_mallocz(sizeof(*sec));
403  if (!sec)
404  return NULL;
405 
406  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url_base, info->uri);
407  sec->url = av_strdup(tmp_str);
408  if (!sec->url) {
409  av_free(sec);
410  return NULL;
411  }
412 
413  if (info->byterange[0]) {
414  sec->size = atoi(info->byterange);
415  ptr = strchr(info->byterange, '@');
416  if (ptr)
417  sec->url_offset = atoi(ptr+1);
418  } else {
419  /* the entire file is the init section */
420  sec->size = -1;
421  }
422 
423  dynarray_add(&pls->init_sections, &pls->n_init_sections, sec);
424 
425  return sec;
426 }
427 
428 static void handle_init_section_args(struct init_section_info *info, const char *key,
429  int key_len, char **dest, int *dest_len)
430 {
431  if (!strncmp(key, "URI=", key_len)) {
432  *dest = info->uri;
433  *dest_len = sizeof(info->uri);
434  } else if (!strncmp(key, "BYTERANGE=", key_len)) {
435  *dest = info->byterange;
436  *dest_len = sizeof(info->byterange);
437  }
438 }
439 
441  char type[16];
447  char defaultr[4];
448  char forced[4];
450 };
451 
452 static struct rendition *new_rendition(HLSContext *c, struct rendition_info *info,
453  const char *url_base)
454 {
455  struct rendition *rend;
457  char *characteristic;
458  char *chr_ptr;
459  char *saveptr;
460 
461  if (!strcmp(info->type, "AUDIO"))
462  type = AVMEDIA_TYPE_AUDIO;
463  else if (!strcmp(info->type, "VIDEO"))
464  type = AVMEDIA_TYPE_VIDEO;
465  else if (!strcmp(info->type, "SUBTITLES"))
466  type = AVMEDIA_TYPE_SUBTITLE;
467  else if (!strcmp(info->type, "CLOSED-CAPTIONS"))
468  /* CLOSED-CAPTIONS is ignored since we do not support CEA-608 CC in
469  * AVC SEI RBSP anyway */
470  return NULL;
471 
472  if (type == AVMEDIA_TYPE_UNKNOWN)
473  return NULL;
474 
475  /* URI is mandatory for subtitles as per spec */
476  if (type == AVMEDIA_TYPE_SUBTITLE && !info->uri[0])
477  return NULL;
478 
479  /* TODO: handle subtitles (each segment has to parsed separately) */
481  if (type == AVMEDIA_TYPE_SUBTITLE)
482  return NULL;
483 
484  rend = av_mallocz(sizeof(struct rendition));
485  if (!rend)
486  return NULL;
487 
488  dynarray_add(&c->renditions, &c->n_renditions, rend);
489 
490  rend->type = type;
491  strcpy(rend->group_id, info->group_id);
492  strcpy(rend->language, info->language);
493  strcpy(rend->name, info->name);
494 
495  /* add the playlist if this is an external rendition */
496  if (info->uri[0]) {
497  rend->playlist = new_playlist(c, info->uri, url_base);
498  if (rend->playlist)
500  &rend->playlist->n_renditions, rend);
501  }
502 
503  if (info->assoc_language[0]) {
504  int langlen = strlen(rend->language);
505  if (langlen < sizeof(rend->language) - 3) {
506  rend->language[langlen] = ',';
507  strncpy(rend->language + langlen + 1, info->assoc_language,
508  sizeof(rend->language) - langlen - 2);
509  }
510  }
511 
512  if (!strcmp(info->defaultr, "YES"))
514  if (!strcmp(info->forced, "YES"))
516 
517  chr_ptr = info->characteristics;
518  while ((characteristic = av_strtok(chr_ptr, ",", &saveptr))) {
519  if (!strcmp(characteristic, "public.accessibility.describes-music-and-sound"))
521  else if (!strcmp(characteristic, "public.accessibility.describes-video"))
523 
524  chr_ptr = NULL;
525  }
526 
527  return rend;
528 }
529 
530 static void handle_rendition_args(struct rendition_info *info, const char *key,
531  int key_len, char **dest, int *dest_len)
532 {
533  if (!strncmp(key, "TYPE=", key_len)) {
534  *dest = info->type;
535  *dest_len = sizeof(info->type);
536  } else if (!strncmp(key, "URI=", key_len)) {
537  *dest = info->uri;
538  *dest_len = sizeof(info->uri);
539  } else if (!strncmp(key, "GROUP-ID=", key_len)) {
540  *dest = info->group_id;
541  *dest_len = sizeof(info->group_id);
542  } else if (!strncmp(key, "LANGUAGE=", key_len)) {
543  *dest = info->language;
544  *dest_len = sizeof(info->language);
545  } else if (!strncmp(key, "ASSOC-LANGUAGE=", key_len)) {
546  *dest = info->assoc_language;
547  *dest_len = sizeof(info->assoc_language);
548  } else if (!strncmp(key, "NAME=", key_len)) {
549  *dest = info->name;
550  *dest_len = sizeof(info->name);
551  } else if (!strncmp(key, "DEFAULT=", key_len)) {
552  *dest = info->defaultr;
553  *dest_len = sizeof(info->defaultr);
554  } else if (!strncmp(key, "FORCED=", key_len)) {
555  *dest = info->forced;
556  *dest_len = sizeof(info->forced);
557  } else if (!strncmp(key, "CHARACTERISTICS=", key_len)) {
558  *dest = info->characteristics;
559  *dest_len = sizeof(info->characteristics);
560  }
561  /*
562  * ignored:
563  * - AUTOSELECT: client may autoselect based on e.g. system language
564  * - INSTREAM-ID: EIA-608 closed caption number ("CC1".."CC4")
565  */
566 }
567 
568 /* used by parse_playlist to allocate a new variant+playlist when the
569  * playlist is detected to be a Media Playlist (not Master Playlist)
570  * and we have no parent Master Playlist (parsing of which would have
571  * allocated the variant and playlist already)
572  * *pls == NULL => Master Playlist or parentless Media Playlist
573  * *pls != NULL => parented Media Playlist, playlist+variant allocated */
574 static int ensure_playlist(HLSContext *c, struct playlist **pls, const char *url)
575 {
576  if (*pls)
577  return 0;
578  if (!new_variant(c, NULL, url, NULL))
579  return AVERROR(ENOMEM);
580  *pls = c->playlists[c->n_playlists - 1];
581  return 0;
582 }
583 
584 static void update_options(char **dest, const char *name, void *src)
585 {
586  av_freep(dest);
587  av_opt_get(src, name, AV_OPT_SEARCH_CHILDREN, (uint8_t**)dest);
588  if (*dest && !strlen(*dest))
589  av_freep(dest);
590 }
591 
592 static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url,
593  AVDictionary *opts, AVDictionary *opts2)
594 {
595  HLSContext *c = s->priv_data;
596  AVDictionary *tmp = NULL;
597  const char *proto_name = NULL;
598  int ret;
599 
600  av_dict_copy(&tmp, opts, 0);
601  av_dict_copy(&tmp, opts2, 0);
602 
603  if (av_strstart(url, "crypto", NULL)) {
604  if (url[6] == '+' || url[6] == ':')
605  proto_name = avio_find_protocol_name(url + 7);
606  }
607 
608  if (!proto_name)
609  proto_name = avio_find_protocol_name(url);
610 
611  if (!proto_name)
612  return AVERROR_INVALIDDATA;
613 
614  // only http(s) & file are allowed
615  if (!av_strstart(proto_name, "http", NULL) && !av_strstart(proto_name, "file", NULL))
616  return AVERROR_INVALIDDATA;
617  if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':')
618  ;
619  else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':')
620  ;
621  else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))
622  return AVERROR_INVALIDDATA;
623 
624  ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
625  if (ret >= 0) {
626  // update cookies on http response with setcookies.
627  void *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb;
628  update_options(&c->cookies, "cookies", u);
629  av_dict_set(&opts, "cookies", c->cookies, 0);
630  }
631 
632  av_dict_free(&tmp);
633 
634  return ret;
635 }
636 
637 static int parse_playlist(HLSContext *c, const char *url,
638  struct playlist *pls, AVIOContext *in)
639 {
640  int ret = 0, is_segment = 0, is_variant = 0;
641  int64_t duration = 0;
642  enum KeyType key_type = KEY_NONE;
643  uint8_t iv[16] = "";
644  int has_iv = 0;
645  char key[MAX_URL_SIZE] = "";
646  char line[MAX_URL_SIZE];
647  const char *ptr;
648  int close_in = 0;
649  int64_t seg_offset = 0;
650  int64_t seg_size = -1;
651  uint8_t *new_url = NULL;
652  struct variant_info variant_info;
653  char tmp_str[MAX_URL_SIZE];
654  struct segment *cur_init_section = NULL;
655 
656  if (!in) {
657 #if 1
659  close_in = 1;
660  /* Some HLS servers don't like being sent the range header */
661  av_dict_set(&opts, "seekable", "0", 0);
662 
663  // broker prior HTTP options that should be consistent across requests
664  av_dict_set(&opts, "user-agent", c->user_agent, 0);
665  av_dict_set(&opts, "cookies", c->cookies, 0);
666  av_dict_set(&opts, "headers", c->headers, 0);
667  av_dict_set(&opts, "http_proxy", c->http_proxy, 0);
668 
669  ret = c->ctx->io_open(c->ctx, &in, url, AVIO_FLAG_READ, &opts);
670  av_dict_free(&opts);
671  if (ret < 0)
672  return ret;
673 #else
674  ret = open_in(c, &in, url);
675  if (ret < 0)
676  return ret;
677  close_in = 1;
678 #endif
679  }
680 
681  if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >= 0)
682  url = new_url;
683 
684  read_chomp_line(in, line, sizeof(line));
685  if (strcmp(line, "#EXTM3U")) {
686  ret = AVERROR_INVALIDDATA;
687  goto fail;
688  }
689 
690  if (pls) {
691  free_segment_list(pls);
692  pls->finished = 0;
693  pls->type = PLS_TYPE_UNSPECIFIED;
694  }
695  while (!avio_feof(in)) {
696  read_chomp_line(in, line, sizeof(line));
697  if (av_strstart(line, "#EXT-X-STREAM-INF:", &ptr)) {
698  is_variant = 1;
699  memset(&variant_info, 0, sizeof(variant_info));
701  &variant_info);
702  } else if (av_strstart(line, "#EXT-X-KEY:", &ptr)) {
703  struct key_info info = {{0}};
705  &info);
706  key_type = KEY_NONE;
707  has_iv = 0;
708  if (!strcmp(info.method, "AES-128"))
709  key_type = KEY_AES_128;
710  if (!strcmp(info.method, "SAMPLE-AES"))
711  key_type = KEY_SAMPLE_AES;
712  if (!strncmp(info.iv, "0x", 2) || !strncmp(info.iv, "0X", 2)) {
713  ff_hex_to_data(iv, info.iv + 2);
714  has_iv = 1;
715  }
716  av_strlcpy(key, info.uri, sizeof(key));
717  } else if (av_strstart(line, "#EXT-X-MEDIA:", &ptr)) {
718  struct rendition_info info = {{0}};
720  &info);
721  new_rendition(c, &info, url);
722  } else if (av_strstart(line, "#EXT-X-TARGETDURATION:", &ptr)) {
723  ret = ensure_playlist(c, &pls, url);
724  if (ret < 0)
725  goto fail;
726  pls->target_duration = atoi(ptr) * AV_TIME_BASE;
727  } else if (av_strstart(line, "#EXT-X-MEDIA-SEQUENCE:", &ptr)) {
728  ret = ensure_playlist(c, &pls, url);
729  if (ret < 0)
730  goto fail;
731  pls->start_seq_no = atoi(ptr);
732  } else if (av_strstart(line, "#EXT-X-PLAYLIST-TYPE:", &ptr)) {
733  ret = ensure_playlist(c, &pls, url);
734  if (ret < 0)
735  goto fail;
736  if (!strcmp(ptr, "EVENT"))
737  pls->type = PLS_TYPE_EVENT;
738  else if (!strcmp(ptr, "VOD"))
739  pls->type = PLS_TYPE_VOD;
740  } else if (av_strstart(line, "#EXT-X-MAP:", &ptr)) {
741  struct init_section_info info = {{0}};
742  ret = ensure_playlist(c, &pls, url);
743  if (ret < 0)
744  goto fail;
746  &info);
747  cur_init_section = new_init_section(pls, &info, url);
748  } else if (av_strstart(line, "#EXT-X-ENDLIST", &ptr)) {
749  if (pls)
750  pls->finished = 1;
751  } else if (av_strstart(line, "#EXTINF:", &ptr)) {
752  is_segment = 1;
753  duration = atof(ptr) * AV_TIME_BASE;
754  } else if (av_strstart(line, "#EXT-X-BYTERANGE:", &ptr)) {
755  seg_size = atoi(ptr);
756  ptr = strchr(ptr, '@');
757  if (ptr)
758  seg_offset = atoi(ptr+1);
759  } else if (av_strstart(line, "#", NULL)) {
760  continue;
761  } else if (line[0]) {
762  if (is_variant) {
763  if (!new_variant(c, &variant_info, line, url)) {
764  ret = AVERROR(ENOMEM);
765  goto fail;
766  }
767  is_variant = 0;
768  }
769  if (is_segment) {
770  struct segment *seg;
771  if (!pls) {
772  if (!new_variant(c, 0, url, NULL)) {
773  ret = AVERROR(ENOMEM);
774  goto fail;
775  }
776  pls = c->playlists[c->n_playlists - 1];
777  }
778  seg = av_malloc(sizeof(struct segment));
779  if (!seg) {
780  ret = AVERROR(ENOMEM);
781  goto fail;
782  }
783  seg->duration = duration;
784  seg->key_type = key_type;
785  if (has_iv) {
786  memcpy(seg->iv, iv, sizeof(iv));
787  } else {
788  int seq = pls->start_seq_no + pls->n_segments;
789  memset(seg->iv, 0, sizeof(seg->iv));
790  AV_WB32(seg->iv + 12, seq);
791  }
792 
793  if (key_type != KEY_NONE) {
794  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, key);
795  seg->key = av_strdup(tmp_str);
796  if (!seg->key) {
797  av_free(seg);
798  ret = AVERROR(ENOMEM);
799  goto fail;
800  }
801  } else {
802  seg->key = NULL;
803  }
804 
805  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, line);
806  seg->url = av_strdup(tmp_str);
807  if (!seg->url) {
808  av_free(seg->key);
809  av_free(seg);
810  ret = AVERROR(ENOMEM);
811  goto fail;
812  }
813 
814  dynarray_add(&pls->segments, &pls->n_segments, seg);
815  is_segment = 0;
816 
817  seg->size = seg_size;
818  if (seg_size >= 0) {
819  seg->url_offset = seg_offset;
820  seg_offset += seg_size;
821  seg_size = -1;
822  } else {
823  seg->url_offset = 0;
824  seg_offset = 0;
825  }
826 
827  seg->init_section = cur_init_section;
828  }
829  }
830  }
831  if (pls)
833 
834 fail:
835  av_free(new_url);
836  if (close_in)
837  ff_format_io_close(c->ctx, &in);
838  return ret;
839 }
840 
841 static struct segment *current_segment(struct playlist *pls)
842 {
843  return pls->segments[pls->cur_seq_no - pls->start_seq_no];
844 }
845 
849 };
850 
851 static int read_from_url(struct playlist *pls, struct segment *seg,
852  uint8_t *buf, int buf_size,
853  enum ReadFromURLMode mode)
854 {
855  int ret;
856 
857  /* limit read if the segment was only a part of a file */
858  if (seg->size >= 0)
859  buf_size = FFMIN(buf_size, seg->size - pls->cur_seg_offset);
860 
861  if (mode == READ_COMPLETE) {
862  ret = avio_read(pls->input, buf, buf_size);
863  if (ret != buf_size)
864  av_log(NULL, AV_LOG_ERROR, "Could not read complete segment.\n");
865  } else
866  ret = avio_read(pls->input, buf, buf_size);
867 
868  if (ret > 0)
869  pls->cur_seg_offset += ret;
870 
871  return ret;
872 }
873 
874 /* Parse the raw ID3 data and pass contents to caller */
876  AVDictionary **metadata, int64_t *dts,
877  ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta **extra_meta)
878 {
879  static const char id3_priv_owner_ts[] = "com.apple.streaming.transportStreamTimestamp";
880  ID3v2ExtraMeta *meta;
881 
882  ff_id3v2_read_dict(pb, metadata, ID3v2_DEFAULT_MAGIC, extra_meta);
883  for (meta = *extra_meta; meta; meta = meta->next) {
884  if (!strcmp(meta->tag, "PRIV")) {
885  ID3v2ExtraMetaPRIV *priv = meta->data;
886  if (priv->datasize == 8 && !strcmp(priv->owner, id3_priv_owner_ts)) {
887  /* 33-bit MPEG timestamp */
888  int64_t ts = AV_RB64(priv->data);
889  av_log(s, AV_LOG_DEBUG, "HLS ID3 audio timestamp %"PRId64"\n", ts);
890  if ((ts & ~((1ULL << 33) - 1)) == 0)
891  *dts = ts;
892  else
893  av_log(s, AV_LOG_ERROR, "Invalid HLS ID3 audio timestamp %"PRId64"\n", ts);
894  }
895  } else if (!strcmp(meta->tag, "APIC") && apic)
896  *apic = meta->data;
897  }
898 }
899 
900 /* Check if the ID3 metadata contents have changed */
901 static int id3_has_changed_values(struct playlist *pls, AVDictionary *metadata,
902  ID3v2ExtraMetaAPIC *apic)
903 {
904  AVDictionaryEntry *entry = NULL;
905  AVDictionaryEntry *oldentry;
906  /* check that no keys have changed values */
907  while ((entry = av_dict_get(metadata, "", entry, AV_DICT_IGNORE_SUFFIX))) {
908  oldentry = av_dict_get(pls->id3_initial, entry->key, NULL, AV_DICT_MATCH_CASE);
909  if (!oldentry || strcmp(oldentry->value, entry->value) != 0)
910  return 1;
911  }
912 
913  /* check if apic appeared */
914  if (apic && (pls->ctx->nb_streams != 2 || !pls->ctx->streams[1]->attached_pic.data))
915  return 1;
916 
917  if (apic) {
918  int size = pls->ctx->streams[1]->attached_pic.size;
919  if (size != apic->buf->size - AV_INPUT_BUFFER_PADDING_SIZE)
920  return 1;
921 
922  if (memcmp(apic->buf->data, pls->ctx->streams[1]->attached_pic.data, size) != 0)
923  return 1;
924  }
925 
926  return 0;
927 }
928 
929 /* Parse ID3 data and handle the found data */
930 static void handle_id3(AVIOContext *pb, struct playlist *pls)
931 {
932  AVDictionary *metadata = NULL;
933  ID3v2ExtraMetaAPIC *apic = NULL;
934  ID3v2ExtraMeta *extra_meta = NULL;
935  int64_t timestamp = AV_NOPTS_VALUE;
936 
937  parse_id3(pls->ctx, pb, &metadata, &timestamp, &apic, &extra_meta);
938 
939  if (timestamp != AV_NOPTS_VALUE) {
940  pls->id3_mpegts_timestamp = timestamp;
941  pls->id3_offset = 0;
942  }
943 
944  if (!pls->id3_found) {
945  /* initial ID3 tags */
947  pls->id3_found = 1;
948 
949  /* get picture attachment and set text metadata */
950  if (pls->ctx->nb_streams)
951  ff_id3v2_parse_apic(pls->ctx, &extra_meta);
952  else
953  /* demuxer not yet opened, defer picture attachment */
954  pls->id3_deferred_extra = extra_meta;
955 
956  av_dict_copy(&pls->ctx->metadata, metadata, 0);
957  pls->id3_initial = metadata;
958 
959  } else {
960  if (!pls->id3_changed && id3_has_changed_values(pls, metadata, apic)) {
961  avpriv_report_missing_feature(pls->ctx, "Changing ID3 metadata in HLS audio elementary stream");
962  pls->id3_changed = 1;
963  }
964  av_dict_free(&metadata);
965  }
966 
967  if (!pls->id3_deferred_extra)
968  ff_id3v2_free_extra_meta(&extra_meta);
969 }
970 
971 static void intercept_id3(struct playlist *pls, uint8_t *buf,
972  int buf_size, int *len)
973 {
974  /* intercept id3 tags, we do not want to pass them to the raw
975  * demuxer on all segment switches */
976  int bytes;
977  int id3_buf_pos = 0;
978  int fill_buf = 0;
979  struct segment *seg = current_segment(pls);
980 
981  /* gather all the id3 tags */
982  while (1) {
983  /* see if we can retrieve enough data for ID3 header */
984  if (*len < ID3v2_HEADER_SIZE && buf_size >= ID3v2_HEADER_SIZE) {
985  bytes = read_from_url(pls, seg, buf + *len, ID3v2_HEADER_SIZE - *len, READ_COMPLETE);
986  if (bytes > 0) {
987 
988  if (bytes == ID3v2_HEADER_SIZE - *len)
989  /* no EOF yet, so fill the caller buffer again after
990  * we have stripped the ID3 tags */
991  fill_buf = 1;
992 
993  *len += bytes;
994 
995  } else if (*len <= 0) {
996  /* error/EOF */
997  *len = bytes;
998  fill_buf = 0;
999  }
1000  }
1001 
1002  if (*len < ID3v2_HEADER_SIZE)
1003  break;
1004 
1005  if (ff_id3v2_match(buf, ID3v2_DEFAULT_MAGIC)) {
1006  int64_t maxsize = seg->size >= 0 ? seg->size : 1024*1024;
1007  int taglen = ff_id3v2_tag_len(buf);
1008  int tag_got_bytes = FFMIN(taglen, *len);
1009  int remaining = taglen - tag_got_bytes;
1010 
1011  if (taglen > maxsize) {
1012  av_log(pls->ctx, AV_LOG_ERROR, "Too large HLS ID3 tag (%d > %"PRId64" bytes)\n",
1013  taglen, maxsize);
1014  break;
1015  }
1016 
1017  /*
1018  * Copy the id3 tag to our temporary id3 buffer.
1019  * We could read a small id3 tag directly without memcpy, but
1020  * we would still need to copy the large tags, and handling
1021  * both of those cases together with the possibility for multiple
1022  * tags would make the handling a bit complex.
1023  */
1024  pls->id3_buf = av_fast_realloc(pls->id3_buf, &pls->id3_buf_size, id3_buf_pos + taglen);
1025  if (!pls->id3_buf)
1026  break;
1027  memcpy(pls->id3_buf + id3_buf_pos, buf, tag_got_bytes);
1028  id3_buf_pos += tag_got_bytes;
1029 
1030  /* strip the intercepted bytes */
1031  *len -= tag_got_bytes;
1032  memmove(buf, buf + tag_got_bytes, *len);
1033  av_log(pls->ctx, AV_LOG_DEBUG, "Stripped %d HLS ID3 bytes\n", tag_got_bytes);
1034 
1035  if (remaining > 0) {
1036  /* read the rest of the tag in */
1037  if (read_from_url(pls, seg, pls->id3_buf + id3_buf_pos, remaining, READ_COMPLETE) != remaining)
1038  break;
1039  id3_buf_pos += remaining;
1040  av_log(pls->ctx, AV_LOG_DEBUG, "Stripped additional %d HLS ID3 bytes\n", remaining);
1041  }
1042 
1043  } else {
1044  /* no more ID3 tags */
1045  break;
1046  }
1047  }
1048 
1049  /* re-fill buffer for the caller unless EOF */
1050  if (*len >= 0 && (fill_buf || *len == 0)) {
1051  bytes = read_from_url(pls, seg, buf + *len, buf_size - *len, READ_NORMAL);
1052 
1053  /* ignore error if we already had some data */
1054  if (bytes >= 0)
1055  *len += bytes;
1056  else if (*len == 0)
1057  *len = bytes;
1058  }
1059 
1060  if (pls->id3_buf) {
1061  /* Now parse all the ID3 tags */
1062  AVIOContext id3ioctx;
1063  ffio_init_context(&id3ioctx, pls->id3_buf, id3_buf_pos, 0, NULL, NULL, NULL, NULL);
1064  handle_id3(&id3ioctx, pls);
1065  }
1066 
1067  if (pls->is_id3_timestamped == -1)
1069 }
1070 
1071 static int open_input(HLSContext *c, struct playlist *pls, struct segment *seg)
1072 {
1073  AVDictionary *opts = NULL;
1074  int ret;
1075 
1076  // broker prior HTTP options that should be consistent across requests
1077  av_dict_set(&opts, "user-agent", c->user_agent, 0);
1078  av_dict_set(&opts, "cookies", c->cookies, 0);
1079  av_dict_set(&opts, "headers", c->headers, 0);
1080  av_dict_set(&opts, "http_proxy", c->http_proxy, 0);
1081  av_dict_set(&opts, "seekable", "0", 0);
1082 
1083  if (seg->size >= 0) {
1084  /* try to restrict the HTTP request to the part we want
1085  * (if this is in fact a HTTP request) */
1086  av_dict_set_int(&opts, "offset", seg->url_offset, 0);
1087  av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
1088  }
1089 
1090  av_log(pls->parent, AV_LOG_VERBOSE, "HLS request for url '%s', offset %"PRId64", playlist %d\n",
1091  seg->url, seg->url_offset, pls->index);
1092 
1093  if (seg->key_type == KEY_NONE) {
1094  ret = open_url(pls->parent, &pls->input, seg->url, c->avio_opts, opts);
1095  } else if (seg->key_type == KEY_AES_128) {
1096  AVDictionary *opts2 = NULL;
1097  char iv[33], key[33], url[MAX_URL_SIZE];
1098  if (strcmp(seg->key, pls->key_url)) {
1099  AVIOContext *pb;
1100  if (open_url(pls->parent, &pb, seg->key, c->avio_opts, opts) == 0) {
1101  ret = avio_read(pb, pls->key, sizeof(pls->key));
1102  if (ret != sizeof(pls->key)) {
1103  av_log(NULL, AV_LOG_ERROR, "Unable to read key file %s\n",
1104  seg->key);
1105  }
1106  ff_format_io_close(pls->parent, &pb);
1107  } else {
1108  av_log(NULL, AV_LOG_ERROR, "Unable to open key file %s\n",
1109  seg->key);
1110  }
1111  av_strlcpy(pls->key_url, seg->key, sizeof(pls->key_url));
1112  }
1113  ff_data_to_hex(iv, seg->iv, sizeof(seg->iv), 0);
1114  ff_data_to_hex(key, pls->key, sizeof(pls->key), 0);
1115  iv[32] = key[32] = '\0';
1116  if (strstr(seg->url, "://"))
1117  snprintf(url, sizeof(url), "crypto+%s", seg->url);
1118  else
1119  snprintf(url, sizeof(url), "crypto:%s", seg->url);
1120 
1121  av_dict_copy(&opts2, c->avio_opts, 0);
1122  av_dict_set(&opts2, "key", key, 0);
1123  av_dict_set(&opts2, "iv", iv, 0);
1124 
1125  ret = open_url(pls->parent, &pls->input, url, opts2, opts);
1126 
1127  av_dict_free(&opts2);
1128 
1129  if (ret < 0) {
1130  goto cleanup;
1131  }
1132  ret = 0;
1133  } else if (seg->key_type == KEY_SAMPLE_AES) {
1134  av_log(pls->parent, AV_LOG_ERROR,
1135  "SAMPLE-AES encryption is not supported yet\n");
1136  ret = AVERROR_PATCHWELCOME;
1137  }
1138  else
1139  ret = AVERROR(ENOSYS);
1140 
1141  /* Seek to the requested position. If this was a HTTP request, the offset
1142  * should already be where want it to, but this allows e.g. local testing
1143  * without a HTTP server. */
1144  if (ret == 0 && seg->key_type == KEY_NONE && seg->url_offset) {
1145  int64_t seekret = avio_seek(pls->input, seg->url_offset, SEEK_SET);
1146  if (seekret < 0) {
1147  av_log(pls->parent, AV_LOG_ERROR, "Unable to seek to offset %"PRId64" of HLS segment '%s'\n", seg->url_offset, seg->url);
1148  ret = seekret;
1149  ff_format_io_close(pls->parent, &pls->input);
1150  }
1151  }
1152 
1153 cleanup:
1154  av_dict_free(&opts);
1155  pls->cur_seg_offset = 0;
1156  return ret;
1157 }
1158 
1159 static int update_init_section(struct playlist *pls, struct segment *seg)
1160 {
1161  static const int max_init_section_size = 1024*1024;
1162  HLSContext *c = pls->parent->priv_data;
1163  int64_t sec_size;
1164  int64_t urlsize;
1165  int ret;
1166 
1167  if (seg->init_section == pls->cur_init_section)
1168  return 0;
1169 
1170  pls->cur_init_section = NULL;
1171 
1172  if (!seg->init_section)
1173  return 0;
1174 
1175  ret = open_input(c, pls, seg->init_section);
1176  if (ret < 0) {
1178  "Failed to open an initialization section in playlist %d\n",
1179  pls->index);
1180  return ret;
1181  }
1182 
1183  if (seg->init_section->size >= 0)
1184  sec_size = seg->init_section->size;
1185  else if ((urlsize = avio_size(pls->input)) >= 0)
1186  sec_size = urlsize;
1187  else
1188  sec_size = max_init_section_size;
1189 
1190  av_log(pls->parent, AV_LOG_DEBUG,
1191  "Downloading an initialization section of size %"PRId64"\n",
1192  sec_size);
1193 
1194  sec_size = FFMIN(sec_size, max_init_section_size);
1195 
1196  av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size);
1197 
1198  ret = read_from_url(pls, seg->init_section, pls->init_sec_buf,
1200  ff_format_io_close(pls->parent, &pls->input);
1201 
1202  if (ret < 0)
1203  return ret;
1204 
1205  pls->cur_init_section = seg->init_section;
1206  pls->init_sec_data_len = ret;
1207  pls->init_sec_buf_read_offset = 0;
1208 
1209  /* spec says audio elementary streams do not have media initialization
1210  * sections, so there should be no ID3 timestamps */
1211  pls->is_id3_timestamped = 0;
1212 
1213  return 0;
1214 }
1215 
1216 static int64_t default_reload_interval(struct playlist *pls)
1217 {
1218  return pls->n_segments > 0 ?
1219  pls->segments[pls->n_segments - 1]->duration :
1220  pls->target_duration;
1221 }
1222 
1223 static int read_data(void *opaque, uint8_t *buf, int buf_size)
1224 {
1225  struct playlist *v = opaque;
1226  HLSContext *c = v->parent->priv_data;
1227  int ret, i;
1228  int just_opened = 0;
1229 
1230 restart:
1231  if (!v->needed)
1232  return AVERROR_EOF;
1233 
1234  if (!v->input) {
1235  int64_t reload_interval;
1236  struct segment *seg;
1237 
1238  /* Check that the playlist is still needed before opening a new
1239  * segment. */
1240  if (v->ctx && v->ctx->nb_streams &&
1241  v->parent->nb_streams >= v->stream_offset + v->ctx->nb_streams) {
1242  v->needed = 0;
1243  for (i = v->stream_offset; i < v->stream_offset + v->ctx->nb_streams;
1244  i++) {
1245  if (v->parent->streams[i]->discard < AVDISCARD_ALL)
1246  v->needed = 1;
1247  }
1248  }
1249  if (!v->needed) {
1250  av_log(v->parent, AV_LOG_INFO, "No longer receiving playlist %d\n",
1251  v->index);
1252  return AVERROR_EOF;
1253  }
1254 
1255  /* If this is a live stream and the reload interval has elapsed since
1256  * the last playlist reload, reload the playlists now. */
1257  reload_interval = default_reload_interval(v);
1258 
1259 reload:
1260  if (!v->finished &&
1261  av_gettime_relative() - v->last_load_time >= reload_interval) {
1262  if ((ret = parse_playlist(c, v->url, v, NULL)) < 0) {
1263  av_log(v->parent, AV_LOG_WARNING, "Failed to reload playlist %d\n",
1264  v->index);
1265  return ret;
1266  }
1267  /* If we need to reload the playlist again below (if
1268  * there's still no more segments), switch to a reload
1269  * interval of half the target duration. */
1270  reload_interval = v->target_duration / 2;
1271  }
1272  if (v->cur_seq_no < v->start_seq_no) {
1274  "skipping %d segments ahead, expired from playlists\n",
1275  v->start_seq_no - v->cur_seq_no);
1276  v->cur_seq_no = v->start_seq_no;
1277  }
1278  if (v->cur_seq_no >= v->start_seq_no + v->n_segments) {
1279  if (v->finished)
1280  return AVERROR_EOF;
1281  while (av_gettime_relative() - v->last_load_time < reload_interval) {
1283  return AVERROR_EXIT;
1284  av_usleep(100*1000);
1285  }
1286  /* Enough time has elapsed since the last reload */
1287  goto reload;
1288  }
1289 
1290  seg = current_segment(v);
1291 
1292  /* load/update Media Initialization Section, if any */
1293  ret = update_init_section(v, seg);
1294  if (ret)
1295  return ret;
1296 
1297  ret = open_input(c, v, seg);
1298  if (ret < 0) {
1300  return AVERROR_EXIT;
1301  av_log(v->parent, AV_LOG_WARNING, "Failed to open segment of playlist %d\n",
1302  v->index);
1303  v->cur_seq_no += 1;
1304  goto reload;
1305  }
1306  just_opened = 1;
1307  }
1308 
1310  /* Push init section out first before first actual segment */
1311  int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size);
1312  memcpy(buf, v->init_sec_buf, copy_size);
1313  v->init_sec_buf_read_offset += copy_size;
1314  return copy_size;
1315  }
1316 
1317  ret = read_from_url(v, current_segment(v), buf, buf_size, READ_NORMAL);
1318  if (ret > 0) {
1319  if (just_opened && v->is_id3_timestamped != 0) {
1320  /* Intercept ID3 tags here, elementary audio streams are required
1321  * to convey timestamps using them in the beginning of each segment. */
1322  intercept_id3(v, buf, buf_size, &ret);
1323  }
1324 
1325  return ret;
1326  }
1327  ff_format_io_close(v->parent, &v->input);
1328  v->cur_seq_no++;
1329 
1330  c->cur_seq_no = v->cur_seq_no;
1331 
1332  goto restart;
1333 }
1334 
1336 {
1337  int variant_count = 0;
1338  int i, j;
1339 
1340  for (i = 0; i < c->n_variants && variant_count < 2; i++) {
1341  struct variant *v = c->variants[i];
1342 
1343  for (j = 0; j < v->n_playlists; j++) {
1344  if (v->playlists[j] == pls) {
1345  variant_count++;
1346  break;
1347  }
1348  }
1349  }
1350 
1351  return variant_count >= 2;
1352 }
1353 
1354 static void add_renditions_to_variant(HLSContext *c, struct variant *var,
1355  enum AVMediaType type, const char *group_id)
1356 {
1357  int i;
1358 
1359  for (i = 0; i < c->n_renditions; i++) {
1360  struct rendition *rend = c->renditions[i];
1361 
1362  if (rend->type == type && !strcmp(rend->group_id, group_id)) {
1363 
1364  if (rend->playlist)
1365  /* rendition is an external playlist
1366  * => add the playlist to the variant */
1367  dynarray_add(&var->playlists, &var->n_playlists, rend->playlist);
1368  else
1369  /* rendition is part of the variant main Media Playlist
1370  * => add the rendition to the main Media Playlist */
1371  dynarray_add(&var->playlists[0]->renditions,
1372  &var->playlists[0]->n_renditions,
1373  rend);
1374  }
1375  }
1376 }
1377 
1379  enum AVMediaType type)
1380 {
1381  int rend_idx = 0;
1382  int i;
1383 
1384  for (i = 0; i < pls->ctx->nb_streams; i++) {
1385  AVStream *st = s->streams[pls->stream_offset + i];
1386 
1387  if (st->codecpar->codec_type != type)
1388  continue;
1389 
1390  for (; rend_idx < pls->n_renditions; rend_idx++) {
1391  struct rendition *rend = pls->renditions[rend_idx];
1392 
1393  if (rend->type != type)
1394  continue;
1395 
1396  if (rend->language[0])
1397  av_dict_set(&st->metadata, "language", rend->language, 0);
1398  if (rend->name[0])
1399  av_dict_set(&st->metadata, "comment", rend->name, 0);
1400 
1401  st->disposition |= rend->disposition;
1402  }
1403  if (rend_idx >=pls->n_renditions)
1404  break;
1405  }
1406 }
1407 
1408 /* if timestamp was in valid range: returns 1 and sets seq_no
1409  * if not: returns 0 and sets seq_no to closest segment */
1411  int64_t timestamp, int *seq_no)
1412 {
1413  int i;
1414  int64_t pos = c->first_timestamp == AV_NOPTS_VALUE ?
1415  0 : c->first_timestamp;
1416 
1417  if (timestamp < pos) {
1418  *seq_no = pls->start_seq_no;
1419  return 0;
1420  }
1421 
1422  for (i = 0; i < pls->n_segments; i++) {
1423  int64_t diff = pos + pls->segments[i]->duration - timestamp;
1424  if (diff > 0) {
1425  *seq_no = pls->start_seq_no + i;
1426  return 1;
1427  }
1428  pos += pls->segments[i]->duration;
1429  }
1430 
1431  *seq_no = pls->start_seq_no + pls->n_segments - 1;
1432 
1433  return 0;
1434 }
1435 
1436 static int select_cur_seq_no(HLSContext *c, struct playlist *pls)
1437 {
1438  int seq_no;
1439 
1440  if (!pls->finished && !c->first_packet &&
1442  /* reload the playlist since it was suspended */
1443  parse_playlist(c, pls->url, pls, NULL);
1444 
1445  /* If playback is already in progress (we are just selecting a new
1446  * playlist) and this is a complete file, find the matching segment
1447  * by counting durations. */
1448  if (pls->finished && c->cur_timestamp != AV_NOPTS_VALUE) {
1449  find_timestamp_in_playlist(c, pls, c->cur_timestamp, &seq_no);
1450  return seq_no;
1451  }
1452 
1453  if (!pls->finished) {
1454  if (!c->first_packet && /* we are doing a segment selection during playback */
1455  c->cur_seq_no >= pls->start_seq_no &&
1456  c->cur_seq_no < pls->start_seq_no + pls->n_segments)
1457  /* While spec 3.4.3 says that we cannot assume anything about the
1458  * content at the same sequence number on different playlists,
1459  * in practice this seems to work and doing it otherwise would
1460  * require us to download a segment to inspect its timestamps. */
1461  return c->cur_seq_no;
1462 
1463  /* If this is a live stream, start live_start_index segments from the
1464  * start or end */
1465  if (c->live_start_index < 0)
1466  return pls->start_seq_no + FFMAX(pls->n_segments + c->live_start_index, 0);
1467  else
1468  return pls->start_seq_no + FFMIN(c->live_start_index, pls->n_segments - 1);
1469  }
1470 
1471  /* Otherwise just start on the first segment. */
1472  return pls->start_seq_no;
1473 }
1474 
1476 {
1477  HLSContext *c = s->priv_data;
1478  const char *opts[] = {
1479  "headers", "http_proxy", "user_agent", "user-agent", "cookies", NULL };
1480  const char **opt = opts;
1481  uint8_t *buf;
1482  int ret = 0;
1483 
1484  while (*opt) {
1485  if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN | AV_OPT_ALLOW_NULL, &buf) >= 0) {
1486  ret = av_dict_set(&c->avio_opts, *opt, buf,
1488  if (ret < 0)
1489  return ret;
1490  }
1491  opt++;
1492  }
1493 
1494  return ret;
1495 }
1496 
1497 static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url,
1498  int flags, AVDictionary **opts)
1499 {
1500  av_log(s, AV_LOG_ERROR,
1501  "A HLS playlist item '%s' referred to an external file '%s'. "
1502  "Opening this file was forbidden for security reasons\n",
1503  s->filename, url);
1504  return AVERROR(EPERM);
1505 }
1506 
1508 {
1509  void *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb;
1510  HLSContext *c = s->priv_data;
1511  int ret = 0, i, j, stream_offset = 0;
1512 
1513  c->ctx = s;
1514  c->interrupt_callback = &s->interrupt_callback;
1515  c->strict_std_compliance = s->strict_std_compliance;
1516 
1517  c->first_packet = 1;
1518  c->first_timestamp = AV_NOPTS_VALUE;
1519  c->cur_timestamp = AV_NOPTS_VALUE;
1520 
1521  if (u) {
1522  // get the previous user agent & set back to null if string size is zero
1523  update_options(&c->user_agent, "user-agent", u);
1524 
1525  // get the previous cookies & set back to null if string size is zero
1526  update_options(&c->cookies, "cookies", u);
1527 
1528  // get the previous headers & set back to null if string size is zero
1529  update_options(&c->headers, "headers", u);
1530 
1531  // get the previous http proxt & set back to null if string size is zero
1532  update_options(&c->http_proxy, "http_proxy", u);
1533  }
1534 
1535  if ((ret = parse_playlist(c, s->filename, NULL, s->pb)) < 0)
1536  goto fail;
1537 
1538  if ((ret = save_avio_options(s)) < 0)
1539  goto fail;
1540 
1541  /* Some HLS servers don't like being sent the range header */
1542  av_dict_set(&c->avio_opts, "seekable", "0", 0);
1543 
1544  if (c->n_variants == 0) {
1545  av_log(NULL, AV_LOG_WARNING, "Empty playlist\n");
1546  ret = AVERROR_EOF;
1547  goto fail;
1548  }
1549  /* If the playlist only contained playlists (Master Playlist),
1550  * parse each individual playlist. */
1551  if (c->n_playlists > 1 || c->playlists[0]->n_segments == 0) {
1552  for (i = 0; i < c->n_playlists; i++) {
1553  struct playlist *pls = c->playlists[i];
1554  if ((ret = parse_playlist(c, pls->url, pls, NULL)) < 0)
1555  goto fail;
1556  }
1557  }
1558 
1559  if (c->variants[0]->playlists[0]->n_segments == 0) {
1560  av_log(NULL, AV_LOG_WARNING, "Empty playlist\n");
1561  ret = AVERROR_EOF;
1562  goto fail;
1563  }
1564 
1565  /* If this isn't a live stream, calculate the total duration of the
1566  * stream. */
1567  if (c->variants[0]->playlists[0]->finished) {
1568  int64_t duration = 0;
1569  for (i = 0; i < c->variants[0]->playlists[0]->n_segments; i++)
1570  duration += c->variants[0]->playlists[0]->segments[i]->duration;
1571  s->duration = duration;
1572  }
1573 
1574  /* Associate renditions with variants */
1575  for (i = 0; i < c->n_variants; i++) {
1576  struct variant *var = c->variants[i];
1577 
1578  if (var->audio_group[0])
1580  if (var->video_group[0])
1582  if (var->subtitles_group[0])
1584  }
1585 
1586  /* Open the demuxer for each playlist */
1587  for (i = 0; i < c->n_playlists; i++) {
1588  struct playlist *pls = c->playlists[i];
1589  AVInputFormat *in_fmt = NULL;
1590 
1591  if (!(pls->ctx = avformat_alloc_context())) {
1592  ret = AVERROR(ENOMEM);
1593  goto fail;
1594  }
1595 
1596  if (pls->n_segments == 0)
1597  continue;
1598 
1599  pls->index = i;
1600  pls->needed = 1;
1601  pls->parent = s;
1602  pls->cur_seq_no = select_cur_seq_no(c, pls);
1603 
1605  if (!pls->read_buffer){
1606  ret = AVERROR(ENOMEM);
1607  avformat_free_context(pls->ctx);
1608  pls->ctx = NULL;
1609  goto fail;
1610  }
1611  ffio_init_context(&pls->pb, pls->read_buffer, INITIAL_BUFFER_SIZE, 0, pls,
1612  read_data, NULL, NULL);
1613  pls->pb.seekable = 0;
1614  ret = av_probe_input_buffer(&pls->pb, &in_fmt, pls->segments[0]->url,
1615  NULL, 0, 0);
1616  if (ret < 0) {
1617  /* Free the ctx - it isn't initialized properly at this point,
1618  * so avformat_close_input shouldn't be called. If
1619  * avformat_open_input fails below, it frees and zeros the
1620  * context, so it doesn't need any special treatment like this. */
1621  av_log(s, AV_LOG_ERROR, "Error when loading first segment '%s'\n", pls->segments[0]->url);
1622  avformat_free_context(pls->ctx);
1623  pls->ctx = NULL;
1624  goto fail;
1625  }
1626  pls->ctx->pb = &pls->pb;
1627  pls->ctx->io_open = nested_io_open;
1629 
1630  if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
1631  goto fail;
1632 
1633  ret = avformat_open_input(&pls->ctx, pls->segments[0]->url, in_fmt, NULL);
1634  if (ret < 0)
1635  goto fail;
1636 
1637  if (pls->id3_deferred_extra && pls->ctx->nb_streams == 1) {
1641  pls->id3_deferred_extra = NULL;
1642  }
1643 
1644  pls->ctx->ctx_flags &= ~AVFMTCTX_NOHEADER;
1645  ret = avformat_find_stream_info(pls->ctx, NULL);
1646  if (ret < 0)
1647  goto fail;
1648 
1649  if (pls->is_id3_timestamped == -1)
1650  av_log(s, AV_LOG_WARNING, "No expected HTTP requests have been made\n");
1651 
1652  /* Create new AVStreams for each stream in this playlist */
1653  for (j = 0; j < pls->ctx->nb_streams; j++) {
1654  AVStream *st = avformat_new_stream(s, NULL);
1655  AVStream *ist = pls->ctx->streams[j];
1656  if (!st) {
1657  ret = AVERROR(ENOMEM);
1658  goto fail;
1659  }
1660  st->id = i;
1661 
1663 
1664  if (pls->is_id3_timestamped) /* custom timestamps via id3 */
1665  avpriv_set_pts_info(st, 33, 1, MPEG_TIME_BASE);
1666  else
1668  }
1669 
1673 
1674  stream_offset += pls->ctx->nb_streams;
1675  }
1676 
1677  /* Create a program for each variant */
1678  for (i = 0; i < c->n_variants; i++) {
1679  struct variant *v = c->variants[i];
1680  AVProgram *program;
1681 
1682  program = av_new_program(s, i);
1683  if (!program)
1684  goto fail;
1685  av_dict_set_int(&program->metadata, "variant_bitrate", v->bandwidth, 0);
1686 
1687  for (j = 0; j < v->n_playlists; j++) {
1688  struct playlist *pls = v->playlists[j];
1689  int is_shared = playlist_in_multiple_variants(c, pls);
1690  int k;
1691 
1692  for (k = 0; k < pls->ctx->nb_streams; k++) {
1693  struct AVStream *st = s->streams[pls->stream_offset + k];
1694 
1696 
1697  /* Set variant_bitrate for streams unique to this variant */
1698  if (!is_shared && v->bandwidth)
1699  av_dict_set_int(&st->metadata, "variant_bitrate", v->bandwidth, 0);
1700  }
1701  }
1702  }
1703 
1704  return 0;
1705 fail:
1709  return ret;
1710 }
1711 
1712 static int recheck_discard_flags(AVFormatContext *s, int first)
1713 {
1714  HLSContext *c = s->priv_data;
1715  int i, changed = 0;
1716 
1717  /* Check if any new streams are needed */
1718  for (i = 0; i < c->n_playlists; i++)
1719  c->playlists[i]->cur_needed = 0;
1720 
1721  for (i = 0; i < s->nb_streams; i++) {
1722  AVStream *st = s->streams[i];
1723  struct playlist *pls = c->playlists[s->streams[i]->id];
1724  if (st->discard < AVDISCARD_ALL)
1725  pls->cur_needed = 1;
1726  }
1727  for (i = 0; i < c->n_playlists; i++) {
1728  struct playlist *pls = c->playlists[i];
1729  if (pls->cur_needed && !pls->needed) {
1730  pls->needed = 1;
1731  changed = 1;
1732  pls->cur_seq_no = select_cur_seq_no(c, pls);
1733  pls->pb.eof_reached = 0;
1734  if (c->cur_timestamp != AV_NOPTS_VALUE) {
1735  /* catch up */
1736  pls->seek_timestamp = c->cur_timestamp;
1737  pls->seek_flags = AVSEEK_FLAG_ANY;
1738  pls->seek_stream_index = -1;
1739  }
1740  av_log(s, AV_LOG_INFO, "Now receiving playlist %d, segment %d\n", i, pls->cur_seq_no);
1741  } else if (first && !pls->cur_needed && pls->needed) {
1742  if (pls->input)
1743  ff_format_io_close(pls->parent, &pls->input);
1744  pls->needed = 0;
1745  changed = 1;
1746  av_log(s, AV_LOG_INFO, "No longer receiving playlist %d\n", i);
1747  }
1748  }
1749  return changed;
1750 }
1751 
1753 {
1754  if (pls->id3_offset >= 0) {
1755  pls->pkt.dts = pls->id3_mpegts_timestamp +
1756  av_rescale_q(pls->id3_offset,
1757  pls->ctx->streams[pls->pkt.stream_index]->time_base,
1759  if (pls->pkt.duration)
1760  pls->id3_offset += pls->pkt.duration;
1761  else
1762  pls->id3_offset = -1;
1763  } else {
1764  /* there have been packets with unknown duration
1765  * since the last id3 tag, should not normally happen */
1766  pls->pkt.dts = AV_NOPTS_VALUE;
1767  }
1768 
1769  if (pls->pkt.duration)
1770  pls->pkt.duration = av_rescale_q(pls->pkt.duration,
1771  pls->ctx->streams[pls->pkt.stream_index]->time_base,
1773 
1774  pls->pkt.pts = AV_NOPTS_VALUE;
1775 }
1776 
1777 static AVRational get_timebase(struct playlist *pls)
1778 {
1779  if (pls->is_id3_timestamped)
1780  return MPEG_TIME_BASE_Q;
1781 
1782  return pls->ctx->streams[pls->pkt.stream_index]->time_base;
1783 }
1784 
1785 static int compare_ts_with_wrapdetect(int64_t ts_a, struct playlist *pls_a,
1786  int64_t ts_b, struct playlist *pls_b)
1787 {
1788  int64_t scaled_ts_a = av_rescale_q(ts_a, get_timebase(pls_a), MPEG_TIME_BASE_Q);
1789  int64_t scaled_ts_b = av_rescale_q(ts_b, get_timebase(pls_b), MPEG_TIME_BASE_Q);
1790 
1791  return av_compare_mod(scaled_ts_a, scaled_ts_b, 1LL << 33);
1792 }
1793 
1795 {
1796  HLSContext *c = s->priv_data;
1797  int ret, i, minplaylist = -1;
1798 
1800  c->first_packet = 0;
1801 
1802  for (i = 0; i < c->n_playlists; i++) {
1803  struct playlist *pls = c->playlists[i];
1804  /* Make sure we've got one buffered packet from each open playlist
1805  * stream */
1806  if (pls->needed && !pls->pkt.data) {
1807  while (1) {
1808  int64_t ts_diff;
1809  AVRational tb;
1810  ret = av_read_frame(pls->ctx, &pls->pkt);
1811  if (ret < 0) {
1812  if (!avio_feof(&pls->pb) && ret != AVERROR_EOF)
1813  return ret;
1814  reset_packet(&pls->pkt);
1815  break;
1816  } else {
1817  /* stream_index check prevents matching picture attachments etc. */
1818  if (pls->is_id3_timestamped && pls->pkt.stream_index == 0) {
1819  /* audio elementary streams are id3 timestamped */
1821  }
1822 
1823  if (c->first_timestamp == AV_NOPTS_VALUE &&
1824  pls->pkt.dts != AV_NOPTS_VALUE)
1825  c->first_timestamp = av_rescale_q(pls->pkt.dts,
1827  }
1828 
1829  if (pls->seek_timestamp == AV_NOPTS_VALUE)
1830  break;
1831 
1832  if (pls->seek_stream_index < 0 ||
1833  pls->seek_stream_index == pls->pkt.stream_index) {
1834 
1835  if (pls->pkt.dts == AV_NOPTS_VALUE) {
1837  break;
1838  }
1839 
1840  tb = get_timebase(pls);
1841  ts_diff = av_rescale_rnd(pls->pkt.dts, AV_TIME_BASE,
1842  tb.den, AV_ROUND_DOWN) -
1843  pls->seek_timestamp;
1844  if (ts_diff >= 0 && (pls->seek_flags & AVSEEK_FLAG_ANY ||
1845  pls->pkt.flags & AV_PKT_FLAG_KEY)) {
1847  break;
1848  }
1849  }
1850  av_packet_unref(&pls->pkt);
1851  reset_packet(&pls->pkt);
1852  }
1853  }
1854  /* Check if this stream has the packet with the lowest dts */
1855  if (pls->pkt.data) {
1856  struct playlist *minpls = minplaylist < 0 ?
1857  NULL : c->playlists[minplaylist];
1858  if (minplaylist < 0) {
1859  minplaylist = i;
1860  } else {
1861  int64_t dts = pls->pkt.dts;
1862  int64_t mindts = minpls->pkt.dts;
1863 
1864  if (dts == AV_NOPTS_VALUE ||
1865  (mindts != AV_NOPTS_VALUE && compare_ts_with_wrapdetect(dts, pls, mindts, minpls) < 0))
1866  minplaylist = i;
1867  }
1868  }
1869  }
1870 
1871  /* If we got a packet, return it */
1872  if (minplaylist >= 0) {
1873  struct playlist *pls = c->playlists[minplaylist];
1874  *pkt = pls->pkt;
1875  pkt->stream_index += pls->stream_offset;
1876  reset_packet(&c->playlists[minplaylist]->pkt);
1877 
1878  if (pkt->dts != AV_NOPTS_VALUE)
1879  c->cur_timestamp = av_rescale_q(pkt->dts,
1880  pls->ctx->streams[pls->pkt.stream_index]->time_base,
1881  AV_TIME_BASE_Q);
1882 
1883  return 0;
1884  }
1885  return AVERROR_EOF;
1886 }
1887 
1889 {
1890  HLSContext *c = s->priv_data;
1891 
1892  free_playlist_list(c);
1893  free_variant_list(c);
1895 
1896  av_dict_free(&c->avio_opts);
1897 
1898  return 0;
1899 }
1900 
1901 static int hls_read_seek(AVFormatContext *s, int stream_index,
1902  int64_t timestamp, int flags)
1903 {
1904  HLSContext *c = s->priv_data;
1905  struct playlist *seek_pls = NULL;
1906  int i, seq_no;
1907  int64_t first_timestamp, seek_timestamp, duration;
1908 
1909  if ((flags & AVSEEK_FLAG_BYTE) ||
1910  !(c->variants[0]->playlists[0]->finished || c->variants[0]->playlists[0]->type == PLS_TYPE_EVENT))
1911  return AVERROR(ENOSYS);
1912 
1913  first_timestamp = c->first_timestamp == AV_NOPTS_VALUE ?
1914  0 : c->first_timestamp;
1915 
1916  seek_timestamp = av_rescale_rnd(timestamp, AV_TIME_BASE,
1917  s->streams[stream_index]->time_base.den,
1918  flags & AVSEEK_FLAG_BACKWARD ?
1920 
1921  duration = s->duration == AV_NOPTS_VALUE ?
1922  0 : s->duration;
1923 
1924  if (0 < duration && duration < seek_timestamp - first_timestamp)
1925  return AVERROR(EIO);
1926 
1927  /* find the playlist with the specified stream */
1928  for (i = 0; i < c->n_playlists; i++) {
1929  struct playlist *pls = c->playlists[i];
1930  if (stream_index >= pls->stream_offset &&
1931  stream_index - pls->stream_offset < pls->ctx->nb_streams) {
1932  seek_pls = pls;
1933  break;
1934  }
1935  }
1936  /* check if the timestamp is valid for the playlist with the
1937  * specified stream index */
1938  if (!seek_pls || !find_timestamp_in_playlist(c, seek_pls, seek_timestamp, &seq_no))
1939  return AVERROR(EIO);
1940 
1941  /* set segment now so we do not need to search again below */
1942  seek_pls->cur_seq_no = seq_no;
1943  seek_pls->seek_stream_index = stream_index - seek_pls->stream_offset;
1944 
1945  for (i = 0; i < c->n_playlists; i++) {
1946  /* Reset reading */
1947  struct playlist *pls = c->playlists[i];
1948  if (pls->input)
1949  ff_format_io_close(pls->parent, &pls->input);
1950  av_packet_unref(&pls->pkt);
1951  reset_packet(&pls->pkt);
1952  pls->pb.eof_reached = 0;
1953  /* Clear any buffered data */
1954  pls->pb.buf_end = pls->pb.buf_ptr = pls->pb.buffer;
1955  /* Reset the pos, to let the mpegts demuxer know we've seeked. */
1956  pls->pb.pos = 0;
1957  /* Flush the packet queue of the subdemuxer. */
1958  ff_read_frame_flush(pls->ctx);
1959 
1961  pls->seek_flags = flags;
1962 
1963  if (pls != seek_pls) {
1964  /* set closest segment seq_no for playlists not handled above */
1965  find_timestamp_in_playlist(c, pls, seek_timestamp, &pls->cur_seq_no);
1966  /* seek the playlist to the given position without taking
1967  * keyframes into account since this playlist does not have the
1968  * specified stream where we should look for the keyframes */
1969  pls->seek_stream_index = -1;
1970  pls->seek_flags |= AVSEEK_FLAG_ANY;
1971  }
1972  }
1973 
1975 
1976  return 0;
1977 }
1978 
1979 static int hls_probe(AVProbeData *p)
1980 {
1981  /* Require #EXTM3U at the start, and either one of the ones below
1982  * somewhere for a proper match. */
1983  if (strncmp(p->buf, "#EXTM3U", 7))
1984  return 0;
1985 
1986  if (strstr(p->buf, "#EXT-X-STREAM-INF:") ||
1987  strstr(p->buf, "#EXT-X-TARGETDURATION:") ||
1988  strstr(p->buf, "#EXT-X-MEDIA-SEQUENCE:"))
1989  return AVPROBE_SCORE_MAX;
1990  return 0;
1991 }
1992 
1993 #define OFFSET(x) offsetof(HLSContext, x)
1994 #define FLAGS AV_OPT_FLAG_DECODING_PARAM
1995 static const AVOption hls_options[] = {
1996  {"live_start_index", "segment index to start live streams at (negative values are from the end)",
1997  OFFSET(live_start_index), AV_OPT_TYPE_INT, {.i64 = -3}, INT_MIN, INT_MAX, FLAGS},
1998  {NULL}
1999 };
2000 
2001 static const AVClass hls_class = {
2002  .class_name = "hls,applehttp",
2003  .item_name = av_default_item_name,
2004  .option = hls_options,
2005  .version = LIBAVUTIL_VERSION_INT,
2006 };
2007 
2009  .name = "hls,applehttp",
2010  .long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
2011  .priv_class = &hls_class,
2012  .priv_data_size = sizeof(HLSContext),
2013  .read_probe = hls_probe,
2016  .read_close = hls_close,
2018 };
#define FF_COMPLIANCE_EXPERIMENTAL
Allow nonstandardized experimental things.
Definition: avcodec.h:2861
#define AVSEEK_FLAG_BACKWARD
Definition: avformat.h:2360
uint8_t key[16]
Definition: hls.c:122
#define NULL
Definition: coverity.c:32
static int update_init_section(struct playlist *pls, struct segment *seg)
Definition: hls.c:1159
int needed
Definition: hls.c:109
struct segment * init_section
Definition: hls.c:76
void ff_make_absolute_url(char *buf, int size, const char *base, const char *rel)
Convert a relative url into an absolute url, given a base url.
Definition: url.c:80
const char * s
Definition: avisynth_c.h: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
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:292
int bandwidth
Definition: hls.c:169
Definition: hls.c:92
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:445
int strict_std_compliance
Definition: hls.c:201
ReadFromURLMode
Definition: hls.c:846
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1571
AVDictionary * id3_initial
Definition: hls.c:131
AVOption.
Definition: opt.h:245
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:282
struct segment ** init_sections
Definition: hls.c:150
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:428
static int read_from_url(struct playlist *pls, struct segment *seg, uint8_t *buf, int buf_size, enum ReadFromURLMode mode)
Definition: hls.c:851
int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding rnd)
Rescale a 64-bit integer with specified rounding.
Definition: mathematics.c:58
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
unsigned int id3_buf_size
Definition: hls.c:130
ID3v2ExtraMeta * id3_deferred_extra
Definition: hls.c:134
#define LIBAVUTIL_VERSION_INT
Definition: version.h:70
unsigned char * buf_ptr
Current position in the buffer.
Definition: avio.h:174
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:175
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:4399
#define AVSEEK_FLAG_ANY
seek to any frame, even non-keyframes
Definition: avformat.h:2362
char forced[4]
Definition: hls.c:448
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
static struct rendition * new_rendition(HLSContext *c, struct rendition_info *info, const char *url_base)
Definition: hls.c:452
static int64_t default_reload_interval(struct playlist *pls)
Definition: hls.c:1216
int disposition
Definition: hls.c:165
unsigned int init_sec_data_len
Definition: hls.c:118
int num
numerator
Definition: rational.h:44
int size
Definition: avcodec.h:1575
#define ID3v2_DEFAULT_MAGIC
Default magic bytes for ID3v2 header: "ID3".
Definition: id3v2.h:35
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:213
#define AVIO_FLAG_READ
read-only
Definition: avio.h:542
char language[MAX_FIELD_LEN]
Definition: hls.c:444
static av_const int av_isspace(int c)
Locale-independent conversion of ASCII isspace.
Definition: avstring.h:222
static int open_input(HLSContext *c, struct playlist *pls, struct segment *seg)
Definition: hls.c:1071
unsigned char * buffer
Start of the buffer.
Definition: avio.h:172
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:216
#define AV_DISPOSITION_HEARING_IMPAIRED
stream for hearing impaired audiences
Definition: avformat.h:842
static void fill_buf(uint8_t *data, int w, int h, int linesize, uint8_t v)
char * key
Definition: hls.c:72
int av_usleep(unsigned usec)
Sleep for a period of time.
Definition: time.c:76
discard all
Definition: avcodec.h:778
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:530
#define MAX_CHARACTERISTICS_LEN
Definition: hls.c:44
int ctx_flags
Flags signalling stream properties.
Definition: avformat.h:1368
int ff_id3v2_parse_apic(AVFormatContext *s, ID3v2ExtraMeta **extra_meta)
Create a stream for each APIC (attached picture) extracted from the ID3v2 header. ...
Definition: id3v2.c:1078
static void reset_packet(AVPacket *pkt)
Definition: hls.c:290
int strict_std_compliance
Allow non-standard and experimental extension.
Definition: avformat.h:1601
char * url
Definition: hls.c:71
int64_t url_offset
Definition: hls.c:69
static int id3_has_changed_values(struct playlist *pls, AVDictionary *metadata, ID3v2ExtraMetaAPIC *apic)
Definition: hls.c:901
Format I/O context.
Definition: avformat.h:1319
#define MAX_URL_SIZE
Definition: internal.h:30
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
char method[11]
Definition: hls.c:367
void ff_read_frame_flush(AVFormatContext *s)
Flush the frame reader.
Definition: utils.c:1776
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
unsigned int init_sec_buf_read_offset
Definition: hls.c:119
Public dictionary API.
char type[16]
Definition: hls.c:441
int n_renditions
Definition: hls.c:187
#define ID3v2_HEADER_SIZE
Definition: id3v2.h:30
#define MPEG_TIME_BASE_Q
Definition: hls.c:47
enum AVMediaType type
Definition: hls.c:160
uint8_t iv[16]
Definition: hls.c:74
char defaultr[4]
Definition: hls.c:447
uint8_t
Round toward +infinity.
Definition: mathematics.h:74
int n_variants
Definition: hls.c:183
#define FLAGS
Definition: hls.c:1994
#define av_malloc(s)
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1278
mode
Definition: f_perms.c:27
AVOptions.
char group_id[MAX_FIELD_LEN]
Definition: hls.c:443
int64_t cur_seg_offset
Definition: hls.c:111
char audio[MAX_FIELD_LEN]
Definition: hls.c:316
static void free_rendition_list(HLSContext *c)
Definition: hls.c:277
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1592
int id
Format-specific stream ID.
Definition: avformat.h:883
uint8_t * read_buffer
Definition: hls.c:95
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5039
char url[MAX_URL_SIZE]
Definition: hls.c:93
static void intercept_id3(struct playlist *pls, uint8_t *buf, int buf_size, int *len)
Definition: hls.c:971
static struct playlist * new_playlist(HLSContext *c, const char *url, const char *base)
Definition: hls.c:296
int ff_copy_whiteblacklists(AVFormatContext *dst, AVFormatContext *src)
Copies the whilelists from one context to the other.
Definition: utils.c:145
AVInputFormat ff_hls_demuxer
Definition: hls.c:2008
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4037
int finished
Definition: hls.c:103
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1387
static void handle_id3(AVIOContext *pb, struct playlist *pls)
Definition: hls.c:930
int n_playlists
Definition: hls.c:185
AVFormatContext * avformat_alloc_context(void)
Allocate an AVFormatContext.
Definition: options.c:132
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:1430
uint8_t * data
Definition: avcodec.h:1574
AVProgram * av_new_program(AVFormatContext *s, int id)
Definition: utils.c:4133
static int read_data(void *opaque, uint8_t *buf, int buf_size)
Definition: hls.c:1223
#define AVERROR_EOF
End of file.
Definition: error.h:55
unsigned int init_sec_buf_size
Definition: hls.c:117
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
ptrdiff_t size
Definition: opengl_enc.c:101
struct rendition ** renditions
Definition: hls.c:145
static void add_metadata_from_renditions(AVFormatContext *s, struct playlist *pls, enum AVMediaType type)
Definition: hls.c:1378
#define av_log(a,...)
static void free_playlist_list(HLSContext *c)
Definition: hls.c:235
struct rendition ** renditions
Definition: hls.c:188
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:550
char * http_proxy
holds the address of the HTTP proxy server
Definition: hls.c:199
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1606
struct variant ** variants
Definition: hls.c:184
static AVRational get_timebase(struct playlist *pls)
Definition: hls.c:1777
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
Callback for checking whether to abort blocking functions.
Definition: avio.h: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:356
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
Definition: utils.c:4047
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:1785
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define AV_DICT_MATCH_CASE
Only get an entry with exact-case key match.
Definition: dict.h:69
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1533
char video_group[MAX_FIELD_LEN]
Definition: hls.c:176
void * av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)
Reallocate the given block if it is not large enough, otherwise do nothing.
Definition: mem.c:480
int64_t cur_timestamp
Definition: hls.c:194
int n_renditions
Definition: hls.c:144
static const AVClass hls_class
Definition: hls.c:2001
AVIOInterruptCB * interrupt_callback
Definition: hls.c:195
char bandwidth[20]
Definition: hls.c:314
static void handle_key_args(struct key_info *info, const char *key, int key_len, char **dest, int *dest_len)
Definition: hls.c:371
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:176
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
char byterange[32]
Definition: hls.c:388
int64_t id3_mpegts_timestamp
Definition: hls.c:127
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:202
static void free_segment_list(struct playlist *pls)
Definition: hls.c:212
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3907
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1062
Definition: graph2dot.c:48
simple assert() macros that are a bit more flexible than ISO C assert().
int first_packet
Definition: hls.c:192
static int find_timestamp_in_playlist(HLSContext *c, struct playlist *pls, int64_t timestamp, int *seq_no)
Definition: hls.c:1410
uint8_t * data
Definition: id3v2.h:78
int64_t id3_offset
Definition: hls.c:128
int is_id3_timestamped
Definition: hls.c:126
New fields can be added to the end with minor version bumps.
Definition: avformat.h:1252
#define FFMAX(a, b)
Definition: common.h:94
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:83
#define fail()
Definition: checkasm.h:81
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1580
static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url, AVDictionary *opts, AVDictionary *opts2)
Definition: hls.c:592
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:461
int live_start_index
Definition: hls.c:191
Definition: hls.c:67
#define AV_DISPOSITION_FORCED
Track should be used during playback by default.
Definition: avformat.h:841
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1375
char group_id[MAX_FIELD_LEN]
Definition: hls.c:162
static struct segment * current_segment(struct playlist *pls)
Definition: hls.c:841
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:207
#define dynarray_add(tab, nb_ptr, elem)
Definition: internal.h:166
char filename[1024]
input or output filename
Definition: avformat.h:1395
static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **opts)
Definition: hls.c:1497
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:246
void av_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
#define FFMIN(a, b)
Definition: common.h:96
#define AV_OPT_SEARCH_CHILDREN
Search in possible children of the given object first.
Definition: opt.h:556
#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:76
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
int index
Definition: hls.c:98
static void add_renditions_to_variant(HLSContext *c, struct variant *var, enum AVMediaType type, const char *group_id)
Definition: hls.c:1354
uint8_t * init_sec_buf
Definition: hls.c:116
static int hls_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: hls.c:1794
int64_t duration
Definition: movenc-test.c:63
uint8_t * id3_buf
Definition: hls.c:129
Definition: hls.c:365
static struct segment * new_init_section(struct playlist *pls, struct init_section_info *info, const char *url_base)
Definition: hls.c:391
int stream_offset
Definition: hls.c:101
AVDictionary * metadata
Definition: avformat.h:945
static struct variant * new_variant(HLSContext *c, struct variant_info *info, const char *url, const char *base)
Definition: hls.c:321
#define AVFMT_FLAG_CUSTOM_IO
The caller has supplied a custom AVIOContext, don't avio_close() it.
Definition: avformat.h:1438
int ff_get_line(AVIOContext *s, char *buf, int maxlen)
Read a whole line of text from AVIOContext.
Definition: aviobuf.c:711
Usually treated as AVMEDIA_TYPE_DATA.
Definition: avutil.h:192
static void fill_timing_for_id3_timestamped_stream(struct playlist *pls)
Definition: hls.c:1752
struct segment ** segments
Definition: hls.c:108
#define src
Definition: vp9dsp.c:530
#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:100
uint8_t * owner
Definition: id3v2.h:77
char subtitles_group[MAX_FIELD_LEN]
Definition: hls.c:177
char name[MAX_FIELD_LEN]
Definition: hls.c:446
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:638
#define AV_DISPOSITION_VISUAL_IMPAIRED
stream for visual impaired audiences
Definition: avformat.h:843
int64_t size
Definition: hls.c:70
enum KeyType key_type
Definition: hls.c:73
static void update_options(char **dest, const char *name, void *src)
Definition: hls.c:584
Stream structure.
Definition: avformat.h:876
int id3_changed
Definition: hls.c:133
#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:417
AVFormatContext * parent
Definition: hls.c:97
AVFormatContext * ctx
Definition: hls.c:182
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:875
#define AV_DISPOSITION_DEFAULT
Definition: avformat.h:829
int64_t first_timestamp
Definition: hls.c:193
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
char subtitles[MAX_FIELD_LEN]
Definition: hls.c:318
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:652
enum PlaylistType type
Definition: hls.c:104
#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:1361
static int parse_playlist(HLSContext *c, const char *url, struct playlist *pls, AVIOContext *in)
Definition: hls.c:637
char url[MAX_URL_SIZE]
Definition: hlsproto.c:55
int n_init_sections
Definition: hls.c:149
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:549
uint8_t * data
The data buffer.
Definition: buffer.h:89
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:1995
static int hls_read_header(AVFormatContext *s)
Definition: hls.c:1507
void * buf
Definition: avisynth_c.h:553
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:112
Describe the class of an AVClass context structure.
Definition: log.h:67
#define AV_WB32(p, v)
Definition: intreadwrite.h:419
AVIOContext * input
Definition: hls.c:96
rational number numerator/denominator
Definition: rational.h:43
int cur_needed
Definition: hls.c:109
struct segment * cur_init_section
Definition: hls.c:115
int seek_stream_index
Definition: hls.c:138
PlaylistType
Definition: hls.c:81
int64_t target_duration
Definition: hls.c:105
static int save_avio_options(AVFormatContext *s)
Definition: hls.c:1475
#define AV_OPT_ALLOW_NULL
In av_opt_get, return NULL if the option has a pointer type and is set to NULL, rather than returning...
Definition: opt.h:571
#define AVSEEK_FLAG_BYTE
seeking based on position in bytes
Definition: avformat.h:2361
char uri[MAX_URL_SIZE]
Definition: hls.c:442
AVMediaType
Definition: avutil.h:191
int n_playlists
Definition: hls.c:172
struct playlist * playlist
Definition: hls.c:161
#define MPEG_TIME_BASE
Definition: hls.c:46
#define snprintf
Definition: snprintf.h:34
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:3973
This structure contains the data a format has to probe a file.
Definition: avformat.h:459
int ff_hex_to_data(uint8_t *data, const char *p)
Parse a string of hexadecimal strings.
Definition: utils.c:4371
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1628
Definition: hls.c:159
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:347
const char * avio_find_protocol_name(const char *url)
Return the name of the protocol that will handle the passed URL.
Definition: avio.c:470
int size
Size of data in bytes.
Definition: buffer.h:93
AVDictionary * metadata
Definition: avformat.h:1258
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:175
int64_t av_gettime_relative(void)
Get the current time in microseconds since some unspecified starting point.
Definition: time.c:56
KeyType
Definition: hls.c:61
static int flags
Definition: cpu.c:47
static int recheck_discard_flags(AVFormatContext *s, int first)
Definition: hls.c:1712
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:4429
int64_t seek_timestamp
Definition: hls.c:136
char iv[35]
Definition: hls.c:368
#define OFFSET(x)
Definition: hls.c:1993
char characteristics[MAX_CHARACTERISTICS_LEN]
Definition: hls.c:449
int seek_flags
Definition: hls.c:137
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:471
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:163
AVIOContext pb
Definition: hls.c:94
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_RB64
Definition: bytestream.h:87
Main libavformat public API header.
char uri[MAX_URL_SIZE]
Definition: hls.c:366
void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size)
Allocate a buffer, reusing the given one if large enough.
Definition: mem.c:499
if(ret< 0)
Definition: vf_mcdeint.c:282
#define INITIAL_BUFFER_SIZE
Definition: hls.c:41
int ff_id3v2_match(const uint8_t *buf, const char *magic)
Detect ID3v2 Header.
Definition: id3v2.c:141
int ffio_init_context(AVIOContext *s, unsigned char *buffer, int buffer_size, int write_flag, void *opaque, int(*read_packet)(void *opaque, uint8_t *buf, int buf_size), int(*write_packet)(void *opaque, uint8_t *buf, int buf_size), int64_t(*seek)(void *opaque, int64_t offset, int whence))
Definition: aviobuf.c:81
#define MAX_FIELD_LEN
Definition: hls.c:43
int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
Read packets of a media file to get stream information.
Definition: utils.c:3260
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:146
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:934
int64_t pos
position in the file of the current buffer
Definition: avio.h:184
int pts_wrap_bits
number of bits in pts (used for wrapping control)
Definition: avformat.h:1048
static int playlist_in_multiple_variants(HLSContext *c, struct playlist *pls)
Definition: hls.c:1335
AVDictionary * avio_opts
Definition: hls.c:200
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:33
char * key
Definition: dict.h:86
int n_segments
Definition: hls.c:107
int den
denominator
Definition: rational.h:45
void avformat_close_input(AVFormatContext **s)
Close an opened input AVFormatContext.
Definition: utils.c:4009
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:725
static int hls_probe(AVProbeData *p)
Definition: hls.c:1979
static int ensure_playlist(HLSContext *c, struct playlist **pls, const char *url)
Definition: hls.c:574
static int hls_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: hls.c:1901
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:726
#define av_free(p)
int id3_found
Definition: hls.c:132
char name[MAX_FIELD_LEN]
Definition: hls.c:164
void ff_id3v2_read_dict(AVIOContext *pb, AVDictionary **metadata, const char *magic, ID3v2ExtraMeta **extra_meta)
Read an ID3v2 tag into specified dictionary and retrieve supported extra metadata.
Definition: id3v2.c:1050
char * value
Definition: dict.h:87
int eof_reached
true if eof reached
Definition: avio.h:186
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:1347
AVBufferRef * buf
Definition: id3v2.h:70
AVFormatContext * ctx
Definition: hls.c:99
AVDictionary * opts
Definition: movenc-test.c:50
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:468
struct playlist ** playlists
Definition: hls.c:173
Definition: hls.c:168
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1573
char video[MAX_FIELD_LEN]
Definition: hls.c:317
int64_t duration
Duration of the stream, in AV_TIME_BASE fractional seconds.
Definition: avformat.h:1414
#define av_freep(p)
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:660
#define AV_DICT_IGNORE_SUFFIX
Return first entry in a dictionary whose first part corresponds to the search key, ignoring the suffix of the found key string.
Definition: dict.h:70
char uri[MAX_URL_SIZE]
Definition: hls.c:387
AVCodecParameters * codecpar
Definition: avformat.h:1006
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:311
int start_seq_no
Definition: hls.c:106
int stream_index
Definition: avcodec.h:1576
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:913
static void free_init_section_list(struct playlist *pls)
Definition: hls.c:224
int64_t duration
Definition: hls.c:68
static void free_variant_list(HLSContext *c)
Definition: hls.c:265
int cur_seq_no
Definition: hls.c:110
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:936
char key_url[MAX_URL_SIZE]
Definition: hls.c:121
int(* io_open)(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **options)
Definition: avformat.h:1877
static int hls_close(AVFormatContext *s)
Definition: hls.c:1888
char * ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase)
Definition: utils.c:4350
This structure stores compressed data.
Definition: avcodec.h:1551
Definition: hls.c:62
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:1567
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:963
#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:160
const char * name
Definition: opengl_enc.c:103
static int select_cur_seq_no(HLSContext *c, struct playlist *pls)
Definition: hls.c:1436