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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 };
77 
78 struct rendition;
79 
84 };
85 
86 /*
87  * Each playlist has its own demuxer. If it currently is active,
88  * it has an open AVIOContext too, and potentially an AVPacket
89  * containing the next packet from this stream.
90  */
91 struct playlist {
97  int index;
101 
102  int finished;
107  struct segment **segments;
110  int64_t cur_seg_offset;
111  int64_t last_load_time;
112 
115 
116  /* ID3 timestamp handling (elementary audio streams have ID3 timestamps
117  * (and possibly other ID3 tags) in the beginning of each segment) */
118  int is_id3_timestamped; /* -1: not yet known */
119  int64_t id3_mpegts_timestamp; /* in mpegts tb */
120  int64_t id3_offset; /* in stream original tb */
121  uint8_t* id3_buf; /* temp buffer for id3 parsing */
122  unsigned int id3_buf_size;
123  AVDictionary *id3_initial; /* data from first id3 tag */
124  int id3_found; /* ID3 tag found at some point */
125  int id3_changed; /* ID3 tag data has changed at some point */
126  ID3v2ExtraMeta *id3_deferred_extra; /* stored here until subdemuxer is opened */
127 
128  int64_t seek_timestamp;
130  int seek_stream_index; /* into subdemuxer stream array */
131 
132  /* Renditions associated with this playlist, if any.
133  * Alternative rendition playlists have a single rendition associated
134  * with them, and variant main Media Playlists may have
135  * multiple (playlist-less) renditions associated with them. */
138 };
139 
140 /*
141  * Renditions are e.g. alternative subtitle or audio streams.
142  * The rendition may either be an external playlist or it may be
143  * contained in the main Media Playlist of the variant (in which case
144  * playlist is NULL).
145  */
146 struct rendition {
153 };
154 
155 struct variant {
157 
158  /* every variant contains at least the main Media Playlist in index 0 */
160  struct playlist **playlists;
161 
165 };
166 
167 typedef struct HLSContext {
168  AVClass *class;
170  struct variant **variants;
172  struct playlist **playlists;
175 
180  int64_t cur_timestamp;
182  char *user_agent; ///< holds HTTP user agent set as an AVOption to the HTTP protocol context
183  char *cookies; ///< holds HTTP cookie values set in either the initial response or as an AVOption to the HTTP protocol context
184  char *headers; ///< holds HTTP headers set as an AVOption to the HTTP protocol context
186 } HLSContext;
187 
188 static int read_chomp_line(AVIOContext *s, char *buf, int maxlen)
189 {
190  int len = ff_get_line(s, buf, maxlen);
191  while (len > 0 && av_isspace(buf[len - 1]))
192  buf[--len] = '\0';
193  return len;
194 }
195 
196 static void free_segment_list(struct playlist *pls)
197 {
198  int i;
199  for (i = 0; i < pls->n_segments; i++) {
200  av_freep(&pls->segments[i]->key);
201  av_freep(&pls->segments[i]->url);
202  av_freep(&pls->segments[i]);
203  }
204  av_freep(&pls->segments);
205  pls->n_segments = 0;
206 }
207 
209 {
210  int i;
211  for (i = 0; i < c->n_playlists; i++) {
212  struct playlist *pls = c->playlists[i];
213  free_segment_list(pls);
214  av_freep(&pls->renditions);
215  av_freep(&pls->id3_buf);
216  av_dict_free(&pls->id3_initial);
218  av_free_packet(&pls->pkt);
219  av_freep(&pls->pb.buffer);
220  if (pls->input)
221  ffurl_close(pls->input);
222  if (pls->ctx) {
223  pls->ctx->pb = NULL;
224  avformat_close_input(&pls->ctx);
225  }
226  av_free(pls);
227  }
228  av_freep(&c->playlists);
229  av_freep(&c->cookies);
230  av_freep(&c->user_agent);
231  c->n_playlists = 0;
232 }
233 
235 {
236  int i;
237  for (i = 0; i < c->n_variants; i++) {
238  struct variant *var = c->variants[i];
239  av_freep(&var->playlists);
240  av_free(var);
241  }
242  av_freep(&c->variants);
243  c->n_variants = 0;
244 }
245 
247 {
248  int i;
249  for (i = 0; i < c->n_renditions; i++)
250  av_freep(&c->renditions[i]);
251  av_freep(&c->renditions);
252  c->n_renditions = 0;
253 }
254 
255 /*
256  * Used to reset a statically allocated AVPacket to a clean slate,
257  * containing no data.
258  */
259 static void reset_packet(AVPacket *pkt)
260 {
261  av_init_packet(pkt);
262  pkt->data = NULL;
263 }
264 
265 static struct playlist *new_playlist(HLSContext *c, const char *url,
266  const char *base)
267 {
268  struct playlist *pls = av_mallocz(sizeof(struct playlist));
269  if (!pls)
270  return NULL;
271  reset_packet(&pls->pkt);
272  ff_make_absolute_url(pls->url, sizeof(pls->url), base, url);
274 
275  pls->is_id3_timestamped = -1;
277 
278  dynarray_add(&c->playlists, &c->n_playlists, pls);
279  return pls;
280 }
281 
282 struct variant_info {
283  char bandwidth[20];
284  /* variant group ids: */
288 };
289 
290 static struct variant *new_variant(HLSContext *c, struct variant_info *info,
291  const char *url, const char *base)
292 {
293  struct variant *var;
294  struct playlist *pls;
295 
296  pls = new_playlist(c, url, base);
297  if (!pls)
298  return NULL;
299 
300  var = av_mallocz(sizeof(struct variant));
301  if (!var)
302  return NULL;
303 
304  if (info) {
305  var->bandwidth = atoi(info->bandwidth);
306  strcpy(var->audio_group, info->audio);
307  strcpy(var->video_group, info->video);
308  strcpy(var->subtitles_group, info->subtitles);
309  }
310 
311  dynarray_add(&c->variants, &c->n_variants, var);
312  dynarray_add(&var->playlists, &var->n_playlists, pls);
313  return var;
314 }
315 
316 static void handle_variant_args(struct variant_info *info, const char *key,
317  int key_len, char **dest, int *dest_len)
318 {
319  if (!strncmp(key, "BANDWIDTH=", key_len)) {
320  *dest = info->bandwidth;
321  *dest_len = sizeof(info->bandwidth);
322  } else if (!strncmp(key, "AUDIO=", key_len)) {
323  *dest = info->audio;
324  *dest_len = sizeof(info->audio);
325  } else if (!strncmp(key, "VIDEO=", key_len)) {
326  *dest = info->video;
327  *dest_len = sizeof(info->video);
328  } else if (!strncmp(key, "SUBTITLES=", key_len)) {
329  *dest = info->subtitles;
330  *dest_len = sizeof(info->subtitles);
331  }
332 }
333 
334 struct key_info {
336  char method[11];
337  char iv[35];
338 };
339 
340 static void handle_key_args(struct key_info *info, const char *key,
341  int key_len, char **dest, int *dest_len)
342 {
343  if (!strncmp(key, "METHOD=", key_len)) {
344  *dest = info->method;
345  *dest_len = sizeof(info->method);
346  } else if (!strncmp(key, "URI=", key_len)) {
347  *dest = info->uri;
348  *dest_len = sizeof(info->uri);
349  } else if (!strncmp(key, "IV=", key_len)) {
350  *dest = info->iv;
351  *dest_len = sizeof(info->iv);
352  }
353 }
354 
356  char type[16];
362  char defaultr[4];
363  char forced[4];
365 };
366 
367 static struct rendition *new_rendition(HLSContext *c, struct rendition_info *info,
368  const char *url_base)
369 {
370  struct rendition *rend;
372  char *characteristic;
373  char *chr_ptr;
374  char *saveptr;
375 
376  if (!strcmp(info->type, "AUDIO"))
377  type = AVMEDIA_TYPE_AUDIO;
378  else if (!strcmp(info->type, "VIDEO"))
379  type = AVMEDIA_TYPE_VIDEO;
380  else if (!strcmp(info->type, "SUBTITLES"))
381  type = AVMEDIA_TYPE_SUBTITLE;
382  else if (!strcmp(info->type, "CLOSED-CAPTIONS"))
383  /* CLOSED-CAPTIONS is ignored since we do not support CEA-608 CC in
384  * AVC SEI RBSP anyway */
385  return NULL;
386 
387  if (type == AVMEDIA_TYPE_UNKNOWN)
388  return NULL;
389 
390  /* URI is mandatory for subtitles as per spec */
391  if (type == AVMEDIA_TYPE_SUBTITLE && !info->uri[0])
392  return NULL;
393 
394  /* TODO: handle subtitles (each segment has to parsed separately) */
395  if (type == AVMEDIA_TYPE_SUBTITLE)
396  return NULL;
397 
398  rend = av_mallocz(sizeof(struct rendition));
399  if (!rend)
400  return NULL;
401 
402  dynarray_add(&c->renditions, &c->n_renditions, rend);
403 
404  rend->type = type;
405  strcpy(rend->group_id, info->group_id);
406  strcpy(rend->language, info->language);
407  strcpy(rend->name, info->name);
408 
409  /* add the playlist if this is an external rendition */
410  if (info->uri[0]) {
411  rend->playlist = new_playlist(c, info->uri, url_base);
412  if (rend->playlist)
414  &rend->playlist->n_renditions, rend);
415  }
416 
417  if (info->assoc_language[0]) {
418  int langlen = strlen(rend->language);
419  if (langlen < sizeof(rend->language) - 3) {
420  rend->language[langlen] = ',';
421  strncpy(rend->language + langlen + 1, info->assoc_language,
422  sizeof(rend->language) - langlen - 2);
423  }
424  }
425 
426  if (!strcmp(info->defaultr, "YES"))
428  if (!strcmp(info->forced, "YES"))
430 
431  chr_ptr = info->characteristics;
432  while ((characteristic = av_strtok(chr_ptr, ",", &saveptr))) {
433  if (!strcmp(characteristic, "public.accessibility.describes-music-and-sound"))
435  else if (!strcmp(characteristic, "public.accessibility.describes-video"))
437 
438  chr_ptr = NULL;
439  }
440 
441  return rend;
442 }
443 
444 static void handle_rendition_args(struct rendition_info *info, const char *key,
445  int key_len, char **dest, int *dest_len)
446 {
447  if (!strncmp(key, "TYPE=", key_len)) {
448  *dest = info->type;
449  *dest_len = sizeof(info->type);
450  } else if (!strncmp(key, "URI=", key_len)) {
451  *dest = info->uri;
452  *dest_len = sizeof(info->uri);
453  } else if (!strncmp(key, "GROUP-ID=", key_len)) {
454  *dest = info->group_id;
455  *dest_len = sizeof(info->group_id);
456  } else if (!strncmp(key, "LANGUAGE=", key_len)) {
457  *dest = info->language;
458  *dest_len = sizeof(info->language);
459  } else if (!strncmp(key, "ASSOC-LANGUAGE=", key_len)) {
460  *dest = info->assoc_language;
461  *dest_len = sizeof(info->assoc_language);
462  } else if (!strncmp(key, "NAME=", key_len)) {
463  *dest = info->name;
464  *dest_len = sizeof(info->name);
465  } else if (!strncmp(key, "DEFAULT=", key_len)) {
466  *dest = info->defaultr;
467  *dest_len = sizeof(info->defaultr);
468  } else if (!strncmp(key, "FORCED=", key_len)) {
469  *dest = info->forced;
470  *dest_len = sizeof(info->forced);
471  } else if (!strncmp(key, "CHARACTERISTICS=", key_len)) {
472  *dest = info->characteristics;
473  *dest_len = sizeof(info->characteristics);
474  }
475  /*
476  * ignored:
477  * - AUTOSELECT: client may autoselect based on e.g. system language
478  * - INSTREAM-ID: EIA-608 closed caption number ("CC1".."CC4")
479  */
480 }
481 
482 /* used by parse_playlist to allocate a new variant+playlist when the
483  * playlist is detected to be a Media Playlist (not Master Playlist)
484  * and we have no parent Master Playlist (parsing of which would have
485  * allocated the variant and playlist already)
486  * *pls == NULL => Master Playlist or parentless Media Playlist
487  * *pls != NULL => parented Media Playlist, playlist+variant allocated */
488 static int ensure_playlist(HLSContext *c, struct playlist **pls, const char *url)
489 {
490  if (*pls)
491  return 0;
492  if (!new_variant(c, NULL, url, NULL))
493  return AVERROR(ENOMEM);
494  *pls = c->playlists[c->n_playlists - 1];
495  return 0;
496 }
497 
498 static int open_in(HLSContext *c, AVIOContext **in, const char *url)
499 {
500  AVDictionary *tmp = NULL;
501  int ret;
502 
503  av_dict_copy(&tmp, c->avio_opts, 0);
504 
505  ret = avio_open2(in, url, AVIO_FLAG_READ, c->interrupt_callback, &tmp);
506 
507  av_dict_free(&tmp);
508  return ret;
509 }
510 
511 static int url_connect(struct playlist *pls, AVDictionary *opts, AVDictionary *opts2)
512 {
513  AVDictionary *tmp = NULL;
514  int ret;
515 
516  av_dict_copy(&tmp, opts, 0);
517  av_dict_copy(&tmp, opts2, 0);
518 
519  if ((ret = av_opt_set_dict(pls->input, &tmp)) < 0)
520  goto fail;
521 
522  if ((ret = ffurl_connect(pls->input, NULL)) < 0) {
523  ffurl_close(pls->input);
524  pls->input = NULL;
525  }
526 
527 fail:
528  av_dict_free(&tmp);
529  return ret;
530 }
531 
532 static int open_url(HLSContext *c, URLContext **uc, const char *url, AVDictionary *opts)
533 {
534  AVDictionary *tmp = NULL;
535  int ret;
536 
537  av_dict_copy(&tmp, c->avio_opts, 0);
538  av_dict_copy(&tmp, opts, 0);
539 
540  ret = ffurl_open(uc, url, AVIO_FLAG_READ, c->interrupt_callback, &tmp);
541 
542  av_dict_free(&tmp);
543 
544  return ret;
545 }
546 
547 static int parse_playlist(HLSContext *c, const char *url,
548  struct playlist *pls, AVIOContext *in)
549 {
550  int ret = 0, is_segment = 0, is_variant = 0;
551  int64_t duration = 0;
552  enum KeyType key_type = KEY_NONE;
553  uint8_t iv[16] = "";
554  int has_iv = 0;
555  char key[MAX_URL_SIZE] = "";
556  char line[MAX_URL_SIZE];
557  const char *ptr;
558  int close_in = 0;
559  int64_t seg_offset = 0;
560  int64_t seg_size = -1;
561  uint8_t *new_url = NULL;
562  struct variant_info variant_info;
563  char tmp_str[MAX_URL_SIZE];
564 
565  if (!in) {
566 #if 1
567  AVDictionary *opts = NULL;
568  close_in = 1;
569  /* Some HLS servers don't like being sent the range header */
570  av_dict_set(&opts, "seekable", "0", 0);
571 
572  // broker prior HTTP options that should be consistent across requests
573  av_dict_set(&opts, "user-agent", c->user_agent, 0);
574  av_dict_set(&opts, "cookies", c->cookies, 0);
575  av_dict_set(&opts, "headers", c->headers, 0);
576 
577  ret = avio_open2(&in, url, AVIO_FLAG_READ,
578  c->interrupt_callback, &opts);
579  av_dict_free(&opts);
580  if (ret < 0)
581  return ret;
582 #else
583  ret = open_in(c, &in, url);
584  if (ret < 0)
585  return ret;
586  close_in = 1;
587 #endif
588  }
589 
590  if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >= 0)
591  url = new_url;
592 
593  read_chomp_line(in, line, sizeof(line));
594  if (strcmp(line, "#EXTM3U")) {
595  ret = AVERROR_INVALIDDATA;
596  goto fail;
597  }
598 
599  if (pls) {
600  free_segment_list(pls);
601  pls->finished = 0;
602  pls->type = PLS_TYPE_UNSPECIFIED;
603  }
604  while (!avio_feof(in)) {
605  read_chomp_line(in, line, sizeof(line));
606  if (av_strstart(line, "#EXT-X-STREAM-INF:", &ptr)) {
607  is_variant = 1;
608  memset(&variant_info, 0, sizeof(variant_info));
610  &variant_info);
611  } else if (av_strstart(line, "#EXT-X-KEY:", &ptr)) {
612  struct key_info info = {{0}};
614  &info);
615  key_type = KEY_NONE;
616  has_iv = 0;
617  if (!strcmp(info.method, "AES-128"))
618  key_type = KEY_AES_128;
619  if (!strcmp(info.method, "SAMPLE-AES"))
620  key_type = KEY_SAMPLE_AES;
621  if (!strncmp(info.iv, "0x", 2) || !strncmp(info.iv, "0X", 2)) {
622  ff_hex_to_data(iv, info.iv + 2);
623  has_iv = 1;
624  }
625  av_strlcpy(key, info.uri, sizeof(key));
626  } else if (av_strstart(line, "#EXT-X-MEDIA:", &ptr)) {
627  struct rendition_info info = {{0}};
629  &info);
630  new_rendition(c, &info, url);
631  } else if (av_strstart(line, "#EXT-X-TARGETDURATION:", &ptr)) {
632  ret = ensure_playlist(c, &pls, url);
633  if (ret < 0)
634  goto fail;
635  pls->target_duration = atoi(ptr) * AV_TIME_BASE;
636  } else if (av_strstart(line, "#EXT-X-MEDIA-SEQUENCE:", &ptr)) {
637  ret = ensure_playlist(c, &pls, url);
638  if (ret < 0)
639  goto fail;
640  pls->start_seq_no = atoi(ptr);
641  } else if (av_strstart(line, "#EXT-X-PLAYLIST-TYPE:", &ptr)) {
642  ret = ensure_playlist(c, &pls, url);
643  if (ret < 0)
644  goto fail;
645  if (!strcmp(ptr, "EVENT"))
646  pls->type = PLS_TYPE_EVENT;
647  else if (!strcmp(ptr, "VOD"))
648  pls->type = PLS_TYPE_VOD;
649  } else if (av_strstart(line, "#EXT-X-ENDLIST", &ptr)) {
650  if (pls)
651  pls->finished = 1;
652  } else if (av_strstart(line, "#EXTINF:", &ptr)) {
653  is_segment = 1;
654  duration = atof(ptr) * AV_TIME_BASE;
655  } else if (av_strstart(line, "#EXT-X-BYTERANGE:", &ptr)) {
656  seg_size = atoi(ptr);
657  ptr = strchr(ptr, '@');
658  if (ptr)
659  seg_offset = atoi(ptr+1);
660  } else if (av_strstart(line, "#", NULL)) {
661  continue;
662  } else if (line[0]) {
663  if (is_variant) {
664  if (!new_variant(c, &variant_info, line, url)) {
665  ret = AVERROR(ENOMEM);
666  goto fail;
667  }
668  is_variant = 0;
669  }
670  if (is_segment) {
671  struct segment *seg;
672  if (!pls) {
673  if (!new_variant(c, 0, url, NULL)) {
674  ret = AVERROR(ENOMEM);
675  goto fail;
676  }
677  pls = c->playlists[c->n_playlists - 1];
678  }
679  seg = av_malloc(sizeof(struct segment));
680  if (!seg) {
681  ret = AVERROR(ENOMEM);
682  goto fail;
683  }
684  seg->duration = duration;
685  seg->key_type = key_type;
686  if (has_iv) {
687  memcpy(seg->iv, iv, sizeof(iv));
688  } else {
689  int seq = pls->start_seq_no + pls->n_segments;
690  memset(seg->iv, 0, sizeof(seg->iv));
691  AV_WB32(seg->iv + 12, seq);
692  }
693 
694  if (key_type != KEY_NONE) {
695  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, key);
696  seg->key = av_strdup(tmp_str);
697  if (!seg->key) {
698  av_free(seg);
699  ret = AVERROR(ENOMEM);
700  goto fail;
701  }
702  } else {
703  seg->key = NULL;
704  }
705 
706  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, line);
707  seg->url = av_strdup(tmp_str);
708  if (!seg->url) {
709  av_free(seg->key);
710  av_free(seg);
711  ret = AVERROR(ENOMEM);
712  goto fail;
713  }
714 
715  dynarray_add(&pls->segments, &pls->n_segments, seg);
716  is_segment = 0;
717 
718  seg->size = seg_size;
719  if (seg_size >= 0) {
720  seg->url_offset = seg_offset;
721  seg_offset += seg_size;
722  seg_size = -1;
723  } else {
724  seg->url_offset = 0;
725  seg_offset = 0;
726  }
727  }
728  }
729  }
730  if (pls)
732 
733 fail:
734  av_free(new_url);
735  if (close_in)
736  avio_close(in);
737  return ret;
738 }
739 
743 };
744 
745 /* read from URLContext, limiting read to current segment */
746 static int read_from_url(struct playlist *pls, uint8_t *buf, int buf_size,
747  enum ReadFromURLMode mode)
748 {
749  int ret;
750  struct segment *seg = pls->segments[pls->cur_seq_no - pls->start_seq_no];
751 
752  /* limit read if the segment was only a part of a file */
753  if (seg->size >= 0)
754  buf_size = FFMIN(buf_size, seg->size - pls->cur_seg_offset);
755 
756  if (mode == READ_COMPLETE)
757  ret = ffurl_read_complete(pls->input, buf, buf_size);
758  else
759  ret = ffurl_read(pls->input, buf, buf_size);
760 
761  if (ret > 0)
762  pls->cur_seg_offset += ret;
763 
764  return ret;
765 }
766 
767 /* Parse the raw ID3 data and pass contents to caller */
769  AVDictionary **metadata, int64_t *dts,
770  ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta **extra_meta)
771 {
772  static const char id3_priv_owner_ts[] = "com.apple.streaming.transportStreamTimestamp";
773  ID3v2ExtraMeta *meta;
774 
775  ff_id3v2_read_dict(pb, metadata, ID3v2_DEFAULT_MAGIC, extra_meta);
776  for (meta = *extra_meta; meta; meta = meta->next) {
777  if (!strcmp(meta->tag, "PRIV")) {
778  ID3v2ExtraMetaPRIV *priv = meta->data;
779  if (priv->datasize == 8 && !strcmp(priv->owner, id3_priv_owner_ts)) {
780  /* 33-bit MPEG timestamp */
781  int64_t ts = AV_RB64(priv->data);
782  av_log(s, AV_LOG_DEBUG, "HLS ID3 audio timestamp %"PRId64"\n", ts);
783  if ((ts & ~((1ULL << 33) - 1)) == 0)
784  *dts = ts;
785  else
786  av_log(s, AV_LOG_ERROR, "Invalid HLS ID3 audio timestamp %"PRId64"\n", ts);
787  }
788  } else if (!strcmp(meta->tag, "APIC") && apic)
789  *apic = meta->data;
790  }
791 }
792 
793 /* Check if the ID3 metadata contents have changed */
794 static int id3_has_changed_values(struct playlist *pls, AVDictionary *metadata,
795  ID3v2ExtraMetaAPIC *apic)
796 {
797  AVDictionaryEntry *entry = NULL;
798  AVDictionaryEntry *oldentry;
799  /* check that no keys have changed values */
800  while ((entry = av_dict_get(metadata, "", entry, AV_DICT_IGNORE_SUFFIX))) {
801  oldentry = av_dict_get(pls->id3_initial, entry->key, NULL, AV_DICT_MATCH_CASE);
802  if (!oldentry || strcmp(oldentry->value, entry->value) != 0)
803  return 1;
804  }
805 
806  /* check if apic appeared */
807  if (apic && (pls->ctx->nb_streams != 2 || !pls->ctx->streams[1]->attached_pic.data))
808  return 1;
809 
810  if (apic) {
811  int size = pls->ctx->streams[1]->attached_pic.size;
812  if (size != apic->buf->size - AV_INPUT_BUFFER_PADDING_SIZE)
813  return 1;
814 
815  if (memcmp(apic->buf->data, pls->ctx->streams[1]->attached_pic.data, size) != 0)
816  return 1;
817  }
818 
819  return 0;
820 }
821 
822 /* Parse ID3 data and handle the found data */
823 static void handle_id3(AVIOContext *pb, struct playlist *pls)
824 {
825  AVDictionary *metadata = NULL;
826  ID3v2ExtraMetaAPIC *apic = NULL;
827  ID3v2ExtraMeta *extra_meta = NULL;
828  int64_t timestamp = AV_NOPTS_VALUE;
829 
830  parse_id3(pls->ctx, pb, &metadata, &timestamp, &apic, &extra_meta);
831 
832  if (timestamp != AV_NOPTS_VALUE) {
833  pls->id3_mpegts_timestamp = timestamp;
834  pls->id3_offset = 0;
835  }
836 
837  if (!pls->id3_found) {
838  /* initial ID3 tags */
840  pls->id3_found = 1;
841 
842  /* get picture attachment and set text metadata */
843  if (pls->ctx->nb_streams)
844  ff_id3v2_parse_apic(pls->ctx, &extra_meta);
845  else
846  /* demuxer not yet opened, defer picture attachment */
847  pls->id3_deferred_extra = extra_meta;
848 
849  av_dict_copy(&pls->ctx->metadata, metadata, 0);
850  pls->id3_initial = metadata;
851 
852  } else {
853  if (!pls->id3_changed && id3_has_changed_values(pls, metadata, apic)) {
854  avpriv_report_missing_feature(pls->ctx, "Changing ID3 metadata in HLS audio elementary stream");
855  pls->id3_changed = 1;
856  }
857  av_dict_free(&metadata);
858  }
859 
860  if (!pls->id3_deferred_extra)
861  ff_id3v2_free_extra_meta(&extra_meta);
862 }
863 
864 /* Intercept and handle ID3 tags between URLContext and AVIOContext */
865 static void intercept_id3(struct playlist *pls, uint8_t *buf,
866  int buf_size, int *len)
867 {
868  /* intercept id3 tags, we do not want to pass them to the raw
869  * demuxer on all segment switches */
870  int bytes;
871  int id3_buf_pos = 0;
872  int fill_buf = 0;
873 
874  /* gather all the id3 tags */
875  while (1) {
876  /* see if we can retrieve enough data for ID3 header */
877  if (*len < ID3v2_HEADER_SIZE && buf_size >= ID3v2_HEADER_SIZE) {
878  bytes = read_from_url(pls, buf + *len, ID3v2_HEADER_SIZE - *len, READ_COMPLETE);
879  if (bytes > 0) {
880 
881  if (bytes == ID3v2_HEADER_SIZE - *len)
882  /* no EOF yet, so fill the caller buffer again after
883  * we have stripped the ID3 tags */
884  fill_buf = 1;
885 
886  *len += bytes;
887 
888  } else if (*len <= 0) {
889  /* error/EOF */
890  *len = bytes;
891  fill_buf = 0;
892  }
893  }
894 
895  if (*len < ID3v2_HEADER_SIZE)
896  break;
897 
899  struct segment *seg = pls->segments[pls->cur_seq_no - pls->start_seq_no];
900  int64_t maxsize = seg->size >= 0 ? seg->size : 1024*1024;
901  int taglen = ff_id3v2_tag_len(buf);
902  int tag_got_bytes = FFMIN(taglen, *len);
903  int remaining = taglen - tag_got_bytes;
904 
905  if (taglen > maxsize) {
906  av_log(pls->ctx, AV_LOG_ERROR, "Too large HLS ID3 tag (%d > %"PRId64" bytes)\n",
907  taglen, maxsize);
908  break;
909  }
910 
911  /*
912  * Copy the id3 tag to our temporary id3 buffer.
913  * We could read a small id3 tag directly without memcpy, but
914  * we would still need to copy the large tags, and handling
915  * both of those cases together with the possibility for multiple
916  * tags would make the handling a bit complex.
917  */
918  pls->id3_buf = av_fast_realloc(pls->id3_buf, &pls->id3_buf_size, id3_buf_pos + taglen);
919  if (!pls->id3_buf)
920  break;
921  memcpy(pls->id3_buf + id3_buf_pos, buf, tag_got_bytes);
922  id3_buf_pos += tag_got_bytes;
923 
924  /* strip the intercepted bytes */
925  *len -= tag_got_bytes;
926  memmove(buf, buf + tag_got_bytes, *len);
927  av_log(pls->ctx, AV_LOG_DEBUG, "Stripped %d HLS ID3 bytes\n", tag_got_bytes);
928 
929  if (remaining > 0) {
930  /* read the rest of the tag in */
931  if (read_from_url(pls, pls->id3_buf + id3_buf_pos, remaining, READ_COMPLETE) != remaining)
932  break;
933  id3_buf_pos += remaining;
934  av_log(pls->ctx, AV_LOG_DEBUG, "Stripped additional %d HLS ID3 bytes\n", remaining);
935  }
936 
937  } else {
938  /* no more ID3 tags */
939  break;
940  }
941  }
942 
943  /* re-fill buffer for the caller unless EOF */
944  if (*len >= 0 && (fill_buf || *len == 0)) {
945  bytes = read_from_url(pls, buf + *len, buf_size - *len, READ_NORMAL);
946 
947  /* ignore error if we already had some data */
948  if (bytes >= 0)
949  *len += bytes;
950  else if (*len == 0)
951  *len = bytes;
952  }
953 
954  if (pls->id3_buf) {
955  /* Now parse all the ID3 tags */
956  AVIOContext id3ioctx;
957  ffio_init_context(&id3ioctx, pls->id3_buf, id3_buf_pos, 0, NULL, NULL, NULL, NULL);
958  handle_id3(&id3ioctx, pls);
959  }
960 
961  if (pls->is_id3_timestamped == -1)
963 }
964 
965 static void update_options(char **dest, const char *name, void *src)
966 {
967  av_freep(dest);
968  av_opt_get(src, name, 0, (uint8_t**)dest);
969  if (*dest && !strlen(*dest))
970  av_freep(dest);
971 }
972 
973 static int open_input(HLSContext *c, struct playlist *pls)
974 {
975  AVDictionary *opts = NULL;
976  AVDictionary *opts2 = NULL;
977  int ret;
978  struct segment *seg = pls->segments[pls->cur_seq_no - pls->start_seq_no];
979 
980  // broker prior HTTP options that should be consistent across requests
981  av_dict_set(&opts, "user-agent", c->user_agent, 0);
982  av_dict_set(&opts, "cookies", c->cookies, 0);
983  av_dict_set(&opts, "headers", c->headers, 0);
984  av_dict_set(&opts, "seekable", "0", 0);
985 
986  // Same opts for key request (ffurl_open mutilates the opts so it cannot be used twice)
987  av_dict_copy(&opts2, opts, 0);
988 
989  if (seg->size >= 0) {
990  /* try to restrict the HTTP request to the part we want
991  * (if this is in fact a HTTP request) */
992  av_dict_set_int(&opts, "offset", seg->url_offset, 0);
993  av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
994  }
995 
996  av_log(pls->parent, AV_LOG_VERBOSE, "HLS request for url '%s', offset %"PRId64", playlist %d\n",
997  seg->url, seg->url_offset, pls->index);
998 
999  if (seg->key_type == KEY_NONE) {
1000  ret = open_url(pls->parent->priv_data, &pls->input, seg->url, opts);
1001  } else if (seg->key_type == KEY_AES_128) {
1002 // HLSContext *c = var->parent->priv_data;
1003  char iv[33], key[33], url[MAX_URL_SIZE];
1004  if (strcmp(seg->key, pls->key_url)) {
1005  URLContext *uc;
1006  if (open_url(pls->parent->priv_data, &uc, seg->key, opts2) == 0) {
1007  if (ffurl_read_complete(uc, pls->key, sizeof(pls->key))
1008  != sizeof(pls->key)) {
1009  av_log(NULL, AV_LOG_ERROR, "Unable to read key file %s\n",
1010  seg->key);
1011  }
1012  update_options(&c->cookies, "cookies", uc->priv_data);
1013  av_dict_set(&opts, "cookies", c->cookies, 0);
1014  ffurl_close(uc);
1015  } else {
1016  av_log(NULL, AV_LOG_ERROR, "Unable to open key file %s\n",
1017  seg->key);
1018  }
1019  av_strlcpy(pls->key_url, seg->key, sizeof(pls->key_url));
1020  }
1021  ff_data_to_hex(iv, seg->iv, sizeof(seg->iv), 0);
1022  ff_data_to_hex(key, pls->key, sizeof(pls->key), 0);
1023  iv[32] = key[32] = '\0';
1024  if (strstr(seg->url, "://"))
1025  snprintf(url, sizeof(url), "crypto+%s", seg->url);
1026  else
1027  snprintf(url, sizeof(url), "crypto:%s", seg->url);
1028 
1029  if ((ret = ffurl_alloc(&pls->input, url, AVIO_FLAG_READ,
1030  &pls->parent->interrupt_callback)) < 0)
1031  goto cleanup;
1032  av_opt_set(pls->input->priv_data, "key", key, 0);
1033  av_opt_set(pls->input->priv_data, "iv", iv, 0);
1034 
1035  if ((ret = url_connect(pls, c->avio_opts, opts)) < 0) {
1036  goto cleanup;
1037  }
1038  ret = 0;
1039  } else if (seg->key_type == KEY_SAMPLE_AES) {
1040  av_log(pls->parent, AV_LOG_ERROR,
1041  "SAMPLE-AES encryption is not supported yet\n");
1042  ret = AVERROR_PATCHWELCOME;
1043  }
1044  else
1045  ret = AVERROR(ENOSYS);
1046 
1047  /* Seek to the requested position. If this was a HTTP request, the offset
1048  * should already be where want it to, but this allows e.g. local testing
1049  * without a HTTP server. */
1050  if (ret == 0 && seg->key_type == KEY_NONE) {
1051  int seekret = ffurl_seek(pls->input, seg->url_offset, SEEK_SET);
1052  if (seekret < 0) {
1053  av_log(pls->parent, AV_LOG_ERROR, "Unable to seek to offset %"PRId64" of HLS segment '%s'\n", seg->url_offset, seg->url);
1054  ret = seekret;
1055  ffurl_close(pls->input);
1056  pls->input = NULL;
1057  }
1058  }
1059 
1060 cleanup:
1061  av_dict_free(&opts);
1062  av_dict_free(&opts2);
1063  pls->cur_seg_offset = 0;
1064  return ret;
1065 }
1066 
1067 static int64_t default_reload_interval(struct playlist *pls)
1068 {
1069  return pls->n_segments > 0 ?
1070  pls->segments[pls->n_segments - 1]->duration :
1071  pls->target_duration;
1072 }
1073 
1074 static int read_data(void *opaque, uint8_t *buf, int buf_size)
1075 {
1076  struct playlist *v = opaque;
1077  HLSContext *c = v->parent->priv_data;
1078  int ret, i;
1079  int just_opened = 0;
1080 
1081 restart:
1082  if (!v->needed)
1083  return AVERROR_EOF;
1084 
1085  if (!v->input) {
1086  int64_t reload_interval;
1087 
1088  /* Check that the playlist is still needed before opening a new
1089  * segment. */
1090  if (v->ctx && v->ctx->nb_streams &&
1091  v->parent->nb_streams >= v->stream_offset + v->ctx->nb_streams) {
1092  v->needed = 0;
1093  for (i = v->stream_offset; i < v->stream_offset + v->ctx->nb_streams;
1094  i++) {
1095  if (v->parent->streams[i]->discard < AVDISCARD_ALL)
1096  v->needed = 1;
1097  }
1098  }
1099  if (!v->needed) {
1100  av_log(v->parent, AV_LOG_INFO, "No longer receiving playlist %d\n",
1101  v->index);
1102  return AVERROR_EOF;
1103  }
1104 
1105  /* If this is a live stream and the reload interval has elapsed since
1106  * the last playlist reload, reload the playlists now. */
1107  reload_interval = default_reload_interval(v);
1108 
1109 reload:
1110  if (!v->finished &&
1111  av_gettime_relative() - v->last_load_time >= reload_interval) {
1112  if ((ret = parse_playlist(c, v->url, v, NULL)) < 0) {
1113  av_log(v->parent, AV_LOG_WARNING, "Failed to reload playlist %d\n",
1114  v->index);
1115  return ret;
1116  }
1117  /* If we need to reload the playlist again below (if
1118  * there's still no more segments), switch to a reload
1119  * interval of half the target duration. */
1120  reload_interval = v->target_duration / 2;
1121  }
1122  if (v->cur_seq_no < v->start_seq_no) {
1124  "skipping %d segments ahead, expired from playlists\n",
1125  v->start_seq_no - v->cur_seq_no);
1126  v->cur_seq_no = v->start_seq_no;
1127  }
1128  if (v->cur_seq_no >= v->start_seq_no + v->n_segments) {
1129  if (v->finished)
1130  return AVERROR_EOF;
1131  while (av_gettime_relative() - v->last_load_time < reload_interval) {
1133  return AVERROR_EXIT;
1134  av_usleep(100*1000);
1135  }
1136  /* Enough time has elapsed since the last reload */
1137  goto reload;
1138  }
1139 
1140  ret = open_input(c, v);
1141  if (ret < 0) {
1143  return AVERROR_EXIT;
1144  av_log(v->parent, AV_LOG_WARNING, "Failed to open segment of playlist %d\n",
1145  v->index);
1146  v->cur_seq_no += 1;
1147  goto reload;
1148  }
1149  just_opened = 1;
1150  }
1151 
1152  ret = read_from_url(v, buf, buf_size, READ_NORMAL);
1153  if (ret > 0) {
1154  if (just_opened && v->is_id3_timestamped != 0) {
1155  /* Intercept ID3 tags here, elementary audio streams are required
1156  * to convey timestamps using them in the beginning of each segment. */
1157  intercept_id3(v, buf, buf_size, &ret);
1158  }
1159 
1160  return ret;
1161  }
1162  ffurl_close(v->input);
1163  v->input = NULL;
1164  v->cur_seq_no++;
1165 
1166  c->cur_seq_no = v->cur_seq_no;
1167 
1168  goto restart;
1169 }
1170 
1172 {
1173  int variant_count = 0;
1174  int i, j;
1175 
1176  for (i = 0; i < c->n_variants && variant_count < 2; i++) {
1177  struct variant *v = c->variants[i];
1178 
1179  for (j = 0; j < v->n_playlists; j++) {
1180  if (v->playlists[j] == pls) {
1181  variant_count++;
1182  break;
1183  }
1184  }
1185  }
1186 
1187  return variant_count >= 2;
1188 }
1189 
1190 static void add_renditions_to_variant(HLSContext *c, struct variant *var,
1191  enum AVMediaType type, const char *group_id)
1192 {
1193  int i;
1194 
1195  for (i = 0; i < c->n_renditions; i++) {
1196  struct rendition *rend = c->renditions[i];
1197 
1198  if (rend->type == type && !strcmp(rend->group_id, group_id)) {
1199 
1200  if (rend->playlist)
1201  /* rendition is an external playlist
1202  * => add the playlist to the variant */
1203  dynarray_add(&var->playlists, &var->n_playlists, rend->playlist);
1204  else
1205  /* rendition is part of the variant main Media Playlist
1206  * => add the rendition to the main Media Playlist */
1207  dynarray_add(&var->playlists[0]->renditions,
1208  &var->playlists[0]->n_renditions,
1209  rend);
1210  }
1211  }
1212 }
1213 
1215  enum AVMediaType type)
1216 {
1217  int rend_idx = 0;
1218  int i;
1219 
1220  for (i = 0; i < pls->ctx->nb_streams; i++) {
1221  AVStream *st = s->streams[pls->stream_offset + i];
1222 
1223  if (st->codec->codec_type != type)
1224  continue;
1225 
1226  for (; rend_idx < pls->n_renditions; rend_idx++) {
1227  struct rendition *rend = pls->renditions[rend_idx];
1228 
1229  if (rend->type != type)
1230  continue;
1231 
1232  if (rend->language[0])
1233  av_dict_set(&st->metadata, "language", rend->language, 0);
1234  if (rend->name[0])
1235  av_dict_set(&st->metadata, "comment", rend->name, 0);
1236 
1237  st->disposition |= rend->disposition;
1238  }
1239  if (rend_idx >=pls->n_renditions)
1240  break;
1241  }
1242 }
1243 
1244 /* if timestamp was in valid range: returns 1 and sets seq_no
1245  * if not: returns 0 and sets seq_no to closest segment */
1247  int64_t timestamp, int *seq_no)
1248 {
1249  int i;
1250  int64_t pos = c->first_timestamp == AV_NOPTS_VALUE ?
1251  0 : c->first_timestamp;
1252 
1253  if (timestamp < pos) {
1254  *seq_no = pls->start_seq_no;
1255  return 0;
1256  }
1257 
1258  for (i = 0; i < pls->n_segments; i++) {
1259  int64_t diff = pos + pls->segments[i]->duration - timestamp;
1260  if (diff > 0) {
1261  *seq_no = pls->start_seq_no + i;
1262  return 1;
1263  }
1264  pos += pls->segments[i]->duration;
1265  }
1266 
1267  *seq_no = pls->start_seq_no + pls->n_segments - 1;
1268 
1269  return 0;
1270 }
1271 
1272 static int select_cur_seq_no(HLSContext *c, struct playlist *pls)
1273 {
1274  int seq_no;
1275 
1276  if (!pls->finished && !c->first_packet &&
1278  /* reload the playlist since it was suspended */
1279  parse_playlist(c, pls->url, pls, NULL);
1280 
1281  /* If playback is already in progress (we are just selecting a new
1282  * playlist) and this is a complete file, find the matching segment
1283  * by counting durations. */
1284  if (pls->finished && c->cur_timestamp != AV_NOPTS_VALUE) {
1285  find_timestamp_in_playlist(c, pls, c->cur_timestamp, &seq_no);
1286  return seq_no;
1287  }
1288 
1289  if (!pls->finished) {
1290  if (!c->first_packet && /* we are doing a segment selection during playback */
1291  c->cur_seq_no >= pls->start_seq_no &&
1292  c->cur_seq_no < pls->start_seq_no + pls->n_segments)
1293  /* While spec 3.4.3 says that we cannot assume anything about the
1294  * content at the same sequence number on different playlists,
1295  * in practice this seems to work and doing it otherwise would
1296  * require us to download a segment to inspect its timestamps. */
1297  return c->cur_seq_no;
1298 
1299  /* If this is a live stream, start live_start_index segments from the
1300  * start or end */
1301  if (c->live_start_index < 0)
1302  return pls->start_seq_no + FFMAX(pls->n_segments + c->live_start_index, 0);
1303  else
1304  return pls->start_seq_no + FFMIN(c->live_start_index, pls->n_segments - 1);
1305  }
1306 
1307  /* Otherwise just start on the first segment. */
1308  return pls->start_seq_no;
1309 }
1310 
1312 {
1313  HLSContext *c = s->priv_data;
1314  const char *opts[] = { "headers", "user_agent", "user-agent", "cookies", NULL }, **opt = opts;
1315  uint8_t *buf;
1316  int ret = 0;
1317 
1318  while (*opt) {
1319  if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN, &buf) >= 0) {
1320  ret = av_dict_set(&c->avio_opts, *opt, buf,
1322  if (ret < 0)
1323  return ret;
1324  }
1325  opt++;
1326  }
1327 
1328  return ret;
1329 }
1330 
1332 {
1333  URLContext *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb->opaque;
1334  HLSContext *c = s->priv_data;
1335  int ret = 0, i, j, stream_offset = 0;
1336 
1337  c->interrupt_callback = &s->interrupt_callback;
1338 
1339  c->first_packet = 1;
1340  c->first_timestamp = AV_NOPTS_VALUE;
1341  c->cur_timestamp = AV_NOPTS_VALUE;
1342 
1343  // if the URL context is good, read important options we must broker later
1344  if (u && u->prot->priv_data_class) {
1345  // get the previous user agent & set back to null if string size is zero
1346  update_options(&c->user_agent, "user-agent", u->priv_data);
1347 
1348  // get the previous cookies & set back to null if string size is zero
1349  update_options(&c->cookies, "cookies", u->priv_data);
1350 
1351  // get the previous headers & set back to null if string size is zero
1352  update_options(&c->headers, "headers", u->priv_data);
1353  }
1354 
1355  if ((ret = parse_playlist(c, s->filename, NULL, s->pb)) < 0)
1356  goto fail;
1357 
1358  if ((ret = save_avio_options(s)) < 0)
1359  goto fail;
1360 
1361  /* Some HLS servers don't like being sent the range header */
1362  av_dict_set(&c->avio_opts, "seekable", "0", 0);
1363 
1364  if (c->n_variants == 0) {
1365  av_log(NULL, AV_LOG_WARNING, "Empty playlist\n");
1366  ret = AVERROR_EOF;
1367  goto fail;
1368  }
1369  /* If the playlist only contained playlists (Master Playlist),
1370  * parse each individual playlist. */
1371  if (c->n_playlists > 1 || c->playlists[0]->n_segments == 0) {
1372  for (i = 0; i < c->n_playlists; i++) {
1373  struct playlist *pls = c->playlists[i];
1374  if ((ret = parse_playlist(c, pls->url, pls, NULL)) < 0)
1375  goto fail;
1376  }
1377  }
1378 
1379  if (c->variants[0]->playlists[0]->n_segments == 0) {
1380  av_log(NULL, AV_LOG_WARNING, "Empty playlist\n");
1381  ret = AVERROR_EOF;
1382  goto fail;
1383  }
1384 
1385  /* If this isn't a live stream, calculate the total duration of the
1386  * stream. */
1387  if (c->variants[0]->playlists[0]->finished) {
1388  int64_t duration = 0;
1389  for (i = 0; i < c->variants[0]->playlists[0]->n_segments; i++)
1390  duration += c->variants[0]->playlists[0]->segments[i]->duration;
1391  s->duration = duration;
1392  }
1393 
1394  /* Associate renditions with variants */
1395  for (i = 0; i < c->n_variants; i++) {
1396  struct variant *var = c->variants[i];
1397 
1398  if (var->audio_group[0])
1400  if (var->video_group[0])
1402  if (var->subtitles_group[0])
1404  }
1405 
1406  /* Open the demuxer for each playlist */
1407  for (i = 0; i < c->n_playlists; i++) {
1408  struct playlist *pls = c->playlists[i];
1409  AVInputFormat *in_fmt = NULL;
1410 
1411  if (!(pls->ctx = avformat_alloc_context())) {
1412  ret = AVERROR(ENOMEM);
1413  goto fail;
1414  }
1415 
1416  if (pls->n_segments == 0)
1417  continue;
1418 
1419  pls->index = i;
1420  pls->needed = 1;
1421  pls->parent = s;
1422  pls->cur_seq_no = select_cur_seq_no(c, pls);
1423 
1425  if (!pls->read_buffer){
1426  ret = AVERROR(ENOMEM);
1427  avformat_free_context(pls->ctx);
1428  pls->ctx = NULL;
1429  goto fail;
1430  }
1431  ffio_init_context(&pls->pb, pls->read_buffer, INITIAL_BUFFER_SIZE, 0, pls,
1432  read_data, NULL, NULL);
1433  pls->pb.seekable = 0;
1434  ret = av_probe_input_buffer(&pls->pb, &in_fmt, pls->segments[0]->url,
1435  NULL, 0, 0);
1436  if (ret < 0) {
1437  /* Free the ctx - it isn't initialized properly at this point,
1438  * so avformat_close_input shouldn't be called. If
1439  * avformat_open_input fails below, it frees and zeros the
1440  * context, so it doesn't need any special treatment like this. */
1441  av_log(s, AV_LOG_ERROR, "Error when loading first segment '%s'\n", pls->segments[0]->url);
1442  avformat_free_context(pls->ctx);
1443  pls->ctx = NULL;
1444  goto fail;
1445  }
1446  pls->ctx->pb = &pls->pb;
1448 
1449  if ((ret = ff_copy_whitelists(pls->ctx, s)) < 0)
1450  goto fail;
1451 
1452  ret = avformat_open_input(&pls->ctx, pls->segments[0]->url, in_fmt, NULL);
1453  if (ret < 0)
1454  goto fail;
1455 
1456  if (pls->id3_deferred_extra && pls->ctx->nb_streams == 1) {
1460  pls->id3_deferred_extra = NULL;
1461  }
1462 
1463  pls->ctx->ctx_flags &= ~AVFMTCTX_NOHEADER;
1464  ret = avformat_find_stream_info(pls->ctx, NULL);
1465  if (ret < 0)
1466  goto fail;
1467 
1468  if (pls->is_id3_timestamped == -1)
1469  av_log(s, AV_LOG_WARNING, "No expected HTTP requests have been made\n");
1470 
1471  /* Create new AVStreams for each stream in this playlist */
1472  for (j = 0; j < pls->ctx->nb_streams; j++) {
1473  AVStream *st = avformat_new_stream(s, NULL);
1474  AVStream *ist = pls->ctx->streams[j];
1475  if (!st) {
1476  ret = AVERROR(ENOMEM);
1477  goto fail;
1478  }
1479  st->id = i;
1480 
1481  avcodec_copy_context(st->codec, pls->ctx->streams[j]->codec);
1482 
1483  if (pls->is_id3_timestamped) /* custom timestamps via id3 */
1484  avpriv_set_pts_info(st, 33, 1, MPEG_TIME_BASE);
1485  else
1487  }
1488 
1492 
1493  stream_offset += pls->ctx->nb_streams;
1494  }
1495 
1496  /* Create a program for each variant */
1497  for (i = 0; i < c->n_variants; i++) {
1498  struct variant *v = c->variants[i];
1499  AVProgram *program;
1500 
1501  program = av_new_program(s, i);
1502  if (!program)
1503  goto fail;
1504  av_dict_set_int(&program->metadata, "variant_bitrate", v->bandwidth, 0);
1505 
1506  for (j = 0; j < v->n_playlists; j++) {
1507  struct playlist *pls = v->playlists[j];
1508  int is_shared = playlist_in_multiple_variants(c, pls);
1509  int k;
1510 
1511  for (k = 0; k < pls->ctx->nb_streams; k++) {
1512  struct AVStream *st = s->streams[pls->stream_offset + k];
1513 
1515 
1516  /* Set variant_bitrate for streams unique to this variant */
1517  if (!is_shared && v->bandwidth)
1518  av_dict_set_int(&st->metadata, "variant_bitrate", v->bandwidth, 0);
1519  }
1520  }
1521  }
1522 
1523  return 0;
1524 fail:
1528  return ret;
1529 }
1530 
1531 static int recheck_discard_flags(AVFormatContext *s, int first)
1532 {
1533  HLSContext *c = s->priv_data;
1534  int i, changed = 0;
1535 
1536  /* Check if any new streams are needed */
1537  for (i = 0; i < c->n_playlists; i++)
1538  c->playlists[i]->cur_needed = 0;
1539 
1540  for (i = 0; i < s->nb_streams; i++) {
1541  AVStream *st = s->streams[i];
1542  struct playlist *pls = c->playlists[s->streams[i]->id];
1543  if (st->discard < AVDISCARD_ALL)
1544  pls->cur_needed = 1;
1545  }
1546  for (i = 0; i < c->n_playlists; i++) {
1547  struct playlist *pls = c->playlists[i];
1548  if (pls->cur_needed && !pls->needed) {
1549  pls->needed = 1;
1550  changed = 1;
1551  pls->cur_seq_no = select_cur_seq_no(c, pls);
1552  pls->pb.eof_reached = 0;
1553  if (c->cur_timestamp != AV_NOPTS_VALUE) {
1554  /* catch up */
1555  pls->seek_timestamp = c->cur_timestamp;
1556  pls->seek_flags = AVSEEK_FLAG_ANY;
1557  pls->seek_stream_index = -1;
1558  }
1559  av_log(s, AV_LOG_INFO, "Now receiving playlist %d, segment %d\n", i, pls->cur_seq_no);
1560  } else if (first && !pls->cur_needed && pls->needed) {
1561  if (pls->input)
1562  ffurl_close(pls->input);
1563  pls->input = NULL;
1564  pls->needed = 0;
1565  changed = 1;
1566  av_log(s, AV_LOG_INFO, "No longer receiving playlist %d\n", i);
1567  }
1568  }
1569  return changed;
1570 }
1571 
1573 {
1574  if (pls->id3_offset >= 0) {
1575  pls->pkt.dts = pls->id3_mpegts_timestamp +
1576  av_rescale_q(pls->id3_offset,
1577  pls->ctx->streams[pls->pkt.stream_index]->time_base,
1579  if (pls->pkt.duration)
1580  pls->id3_offset += pls->pkt.duration;
1581  else
1582  pls->id3_offset = -1;
1583  } else {
1584  /* there have been packets with unknown duration
1585  * since the last id3 tag, should not normally happen */
1586  pls->pkt.dts = AV_NOPTS_VALUE;
1587  }
1588 
1589  if (pls->pkt.duration)
1590  pls->pkt.duration = av_rescale_q(pls->pkt.duration,
1591  pls->ctx->streams[pls->pkt.stream_index]->time_base,
1593 
1594  pls->pkt.pts = AV_NOPTS_VALUE;
1595 }
1596 
1597 static AVRational get_timebase(struct playlist *pls)
1598 {
1599  if (pls->is_id3_timestamped)
1600  return MPEG_TIME_BASE_Q;
1601 
1602  return pls->ctx->streams[pls->pkt.stream_index]->time_base;
1603 }
1604 
1605 static int compare_ts_with_wrapdetect(int64_t ts_a, struct playlist *pls_a,
1606  int64_t ts_b, struct playlist *pls_b)
1607 {
1608  int64_t scaled_ts_a = av_rescale_q(ts_a, get_timebase(pls_a), MPEG_TIME_BASE_Q);
1609  int64_t scaled_ts_b = av_rescale_q(ts_b, get_timebase(pls_b), MPEG_TIME_BASE_Q);
1610 
1611  return av_compare_mod(scaled_ts_a, scaled_ts_b, 1LL << 33);
1612 }
1613 
1615 {
1616  HLSContext *c = s->priv_data;
1617  int ret, i, minplaylist = -1;
1618 
1620 
1621  for (i = 0; i < c->n_playlists; i++) {
1622  struct playlist *pls = c->playlists[i];
1623  /* Make sure we've got one buffered packet from each open playlist
1624  * stream */
1625  if (pls->needed && !pls->pkt.data) {
1626  while (1) {
1627  int64_t ts_diff;
1628  AVRational tb;
1629  ret = av_read_frame(pls->ctx, &pls->pkt);
1630  if (ret < 0) {
1631  if (!avio_feof(&pls->pb) && ret != AVERROR_EOF)
1632  return ret;
1633  reset_packet(&pls->pkt);
1634  break;
1635  } else {
1636  /* stream_index check prevents matching picture attachments etc. */
1637  if (pls->is_id3_timestamped && pls->pkt.stream_index == 0) {
1638  /* audio elementary streams are id3 timestamped */
1640  }
1641 
1642  if (c->first_timestamp == AV_NOPTS_VALUE &&
1643  pls->pkt.dts != AV_NOPTS_VALUE)
1644  c->first_timestamp = av_rescale_q(pls->pkt.dts,
1646  }
1647 
1648  if (pls->seek_timestamp == AV_NOPTS_VALUE)
1649  break;
1650 
1651  if (pls->seek_stream_index < 0 ||
1652  pls->seek_stream_index == pls->pkt.stream_index) {
1653 
1654  if (pls->pkt.dts == AV_NOPTS_VALUE) {
1656  break;
1657  }
1658 
1659  tb = get_timebase(pls);
1660  ts_diff = av_rescale_rnd(pls->pkt.dts, AV_TIME_BASE,
1661  tb.den, AV_ROUND_DOWN) -
1662  pls->seek_timestamp;
1663  if (ts_diff >= 0 && (pls->seek_flags & AVSEEK_FLAG_ANY ||
1664  pls->pkt.flags & AV_PKT_FLAG_KEY)) {
1666  break;
1667  }
1668  }
1669  av_free_packet(&pls->pkt);
1670  reset_packet(&pls->pkt);
1671  }
1672  }
1673  /* Check if this stream has the packet with the lowest dts */
1674  if (pls->pkt.data) {
1675  struct playlist *minpls = minplaylist < 0 ?
1676  NULL : c->playlists[minplaylist];
1677  if (minplaylist < 0) {
1678  minplaylist = i;
1679  } else {
1680  int64_t dts = pls->pkt.dts;
1681  int64_t mindts = minpls->pkt.dts;
1682 
1683  if (dts == AV_NOPTS_VALUE ||
1684  (mindts != AV_NOPTS_VALUE && compare_ts_with_wrapdetect(dts, pls, mindts, minpls) < 0))
1685  minplaylist = i;
1686  }
1687  }
1688  }
1689 
1690  /* If we got a packet, return it */
1691  if (minplaylist >= 0) {
1692  struct playlist *pls = c->playlists[minplaylist];
1693  *pkt = pls->pkt;
1694  pkt->stream_index += pls->stream_offset;
1695  reset_packet(&c->playlists[minplaylist]->pkt);
1696 
1697  if (pkt->dts != AV_NOPTS_VALUE)
1698  c->cur_timestamp = av_rescale_q(pkt->dts,
1699  pls->ctx->streams[pls->pkt.stream_index]->time_base,
1700  AV_TIME_BASE_Q);
1701 
1702  return 0;
1703  }
1704  return AVERROR_EOF;
1705 }
1706 
1708 {
1709  HLSContext *c = s->priv_data;
1710 
1711  free_playlist_list(c);
1712  free_variant_list(c);
1714 
1715  av_dict_free(&c->avio_opts);
1716 
1717  return 0;
1718 }
1719 
1720 static int hls_read_seek(AVFormatContext *s, int stream_index,
1721  int64_t timestamp, int flags)
1722 {
1723  HLSContext *c = s->priv_data;
1724  struct playlist *seek_pls = NULL;
1725  int i, seq_no;
1726  int64_t first_timestamp, seek_timestamp, duration;
1727 
1728  if ((flags & AVSEEK_FLAG_BYTE) ||
1729  !(c->variants[0]->playlists[0]->finished || c->variants[0]->playlists[0]->type == PLS_TYPE_EVENT))
1730  return AVERROR(ENOSYS);
1731 
1732  first_timestamp = c->first_timestamp == AV_NOPTS_VALUE ?
1733  0 : c->first_timestamp;
1734 
1735  seek_timestamp = av_rescale_rnd(timestamp, AV_TIME_BASE,
1736  s->streams[stream_index]->time_base.den,
1737  flags & AVSEEK_FLAG_BACKWARD ?
1739 
1740  duration = s->duration == AV_NOPTS_VALUE ?
1741  0 : s->duration;
1742 
1743  if (0 < duration && duration < seek_timestamp - first_timestamp)
1744  return AVERROR(EIO);
1745 
1746  /* find the playlist with the specified stream */
1747  for (i = 0; i < c->n_playlists; i++) {
1748  struct playlist *pls = c->playlists[i];
1749  if (stream_index >= pls->stream_offset &&
1750  stream_index - pls->stream_offset < pls->ctx->nb_streams) {
1751  seek_pls = pls;
1752  break;
1753  }
1754  }
1755  /* check if the timestamp is valid for the playlist with the
1756  * specified stream index */
1757  if (!seek_pls || !find_timestamp_in_playlist(c, seek_pls, seek_timestamp, &seq_no))
1758  return AVERROR(EIO);
1759 
1760  /* set segment now so we do not need to search again below */
1761  seek_pls->cur_seq_no = seq_no;
1762  seek_pls->seek_stream_index = stream_index - seek_pls->stream_offset;
1763 
1764  for (i = 0; i < c->n_playlists; i++) {
1765  /* Reset reading */
1766  struct playlist *pls = c->playlists[i];
1767  if (pls->input) {
1768  ffurl_close(pls->input);
1769  pls->input = NULL;
1770  }
1771  av_free_packet(&pls->pkt);
1772  reset_packet(&pls->pkt);
1773  pls->pb.eof_reached = 0;
1774  /* Clear any buffered data */
1775  pls->pb.buf_end = pls->pb.buf_ptr = pls->pb.buffer;
1776  /* Reset the pos, to let the mpegts demuxer know we've seeked. */
1777  pls->pb.pos = 0;
1778  /* Flush the packet queue of the subdemuxer. */
1779  ff_read_frame_flush(pls->ctx);
1780 
1782  pls->seek_flags = flags;
1783 
1784  if (pls != seek_pls) {
1785  /* set closest segment seq_no for playlists not handled above */
1786  find_timestamp_in_playlist(c, pls, seek_timestamp, &pls->cur_seq_no);
1787  /* seek the playlist to the given position without taking
1788  * keyframes into account since this playlist does not have the
1789  * specified stream where we should look for the keyframes */
1790  pls->seek_stream_index = -1;
1791  pls->seek_flags |= AVSEEK_FLAG_ANY;
1792  }
1793  }
1794 
1796 
1797  return 0;
1798 }
1799 
1800 static int hls_probe(AVProbeData *p)
1801 {
1802  /* Require #EXTM3U at the start, and either one of the ones below
1803  * somewhere for a proper match. */
1804  if (strncmp(p->buf, "#EXTM3U", 7))
1805  return 0;
1806  if (strstr(p->buf, "#EXT-X-STREAM-INF:") ||
1807  strstr(p->buf, "#EXT-X-TARGETDURATION:") ||
1808  strstr(p->buf, "#EXT-X-MEDIA-SEQUENCE:"))
1809  return AVPROBE_SCORE_MAX;
1810  return 0;
1811 }
1812 
1813 #define OFFSET(x) offsetof(HLSContext, x)
1814 #define FLAGS AV_OPT_FLAG_DECODING_PARAM
1815 static const AVOption hls_options[] = {
1816  {"live_start_index", "segment index to start live streams at (negative values are from the end)",
1817  OFFSET(live_start_index), AV_OPT_TYPE_INT, {.i64 = -3}, INT_MIN, INT_MAX, FLAGS},
1818  {NULL}
1819 };
1820 
1821 static const AVClass hls_class = {
1822  .class_name = "hls,applehttp",
1823  .item_name = av_default_item_name,
1824  .option = hls_options,
1825  .version = LIBAVUTIL_VERSION_INT,
1826 };
1827 
1829  .name = "hls,applehttp",
1830  .long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
1831  .priv_class = &hls_class,
1832  .priv_data_size = sizeof(HLSContext),
1833  .read_probe = hls_probe,
1836  .read_close = hls_close,
1838 };
#define AVSEEK_FLAG_BACKWARD
Definition: avformat.h:2277
uint8_t key[16]
Definition: hls.c:114
#define NULL
Definition: coverity.c:32
int needed
Definition: hls.c:108
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:156
Definition: hls.c:91
void av_free_packet(AVPacket *pkt)
Free a packet.
Definition: avpacket.c:280
char * headers
holds HTTP headers set as an AVOption to the HTTP protocol context
Definition: hls.c:184
char assoc_language[MAX_FIELD_LEN]
Definition: hls.c:360
ReadFromURLMode
Definition: hls.c:740
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1523
AVDictionary * id3_initial
Definition: hls.c:123
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
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:122
ID3v2ExtraMeta * id3_deferred_extra
Definition: hls.c:126
#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
int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options)
Open an input stream and read the header.
Definition: utils.c:405
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:4083
#define AVSEEK_FLAG_ANY
seek to any frame, even non-keyframes
Definition: avformat.h:2279
char forced[4]
Definition: hls.c:363
static int open_in(HLSContext *c, AVIOContext **in, const char *url)
Definition: hls.c:498
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:195
static struct rendition * new_rendition(HLSContext *c, struct rendition_info *info, const char *url_base)
Definition: hls.c:367
static int64_t default_reload_interval(struct playlist *pls)
Definition: hls.c:1067
int disposition
Definition: hls.c:152
int num
numerator
Definition: rational.h:44
int size
Definition: avcodec.h:1424
#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:359
unsigned char * buffer
Start of the buffer.
Definition: avio.h:125
#define AV_DISPOSITION_HEARING_IMPAIRED
stream for hearing impaired audiences
Definition: avformat.h:810
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:182
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:444
#define MAX_CHARACTERISTICS_LEN
Definition: hls.c:45
int ctx_flags
Flags signalling stream properties.
Definition: avformat.h:1322
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:259
int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src)
Copy the settings of the source AVCodecContext into the destination AVCodecContext.
Definition: options.c:182
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:794
Format I/O context.
Definition: avformat.h:1273
#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:336
void ff_read_frame_flush(AVFormatContext *s)
Flush the frame reader.
Definition: utils.c:1624
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
Public dictionary API.
char type[16]
Definition: hls.c:356
int n_renditions
Definition: hls.c:173
#define ID3v2_HEADER_SIZE
Definition: id3v2.h:30
#define MPEG_TIME_BASE_Q
Definition: hls.c:48
enum AVMediaType type
Definition: hls.c:147
uint8_t iv[16]
Definition: hls.c:75
char defaultr[4]
Definition: hls.c:362
uint8_t
Round toward +infinity.
Definition: mathematics.h:74
int n_variants
Definition: hls.c:169
#define FLAGS
Definition: hls.c:1814
#define av_malloc(s)
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1232
mode
Definition: f_perms.c:27
static int read_from_url(struct playlist *pls, uint8_t *buf, int buf_size, enum ReadFromURLMode mode)
Definition: hls.c:746
AVOptions.
int av_isspace(int c)
Locale-independent conversion of ASCII isspace.
Definition: avstring.c:330
char group_id[MAX_FIELD_LEN]
Definition: hls.c:358
int64_t cur_seg_offset
Definition: hls.c:110
char audio[MAX_FIELD_LEN]
Definition: hls.c:285
static void free_rendition_list(HLSContext *c)
Definition: hls.c:246
int id
Format-specific stream ID.
Definition: avformat.h:849
uint8_t * read_buffer
Definition: hls.c:94
char url[MAX_URL_SIZE]
Definition: hls.c:92
static void intercept_id3(struct playlist *pls, uint8_t *buf, int buf_size, int *len)
Definition: hls.c:865
static struct playlist * new_playlist(HLSContext *c, const char *url, const char *base)
Definition: hls.c:265
AVInputFormat ff_hls_demuxer
Definition: hls.c:1828
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:3749
int finished
Definition: hls.c:102
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1341
static void handle_id3(AVIOContext *pb, struct playlist *pls)
Definition: hls.c:823
int n_playlists
Definition: hls.c:171
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:1384
uint8_t * data
Definition: avcodec.h:1423
static int url_connect(struct playlist *pls, AVDictionary *opts, AVDictionary *opts2)
Definition: hls.c:511
AVProgram * av_new_program(AVFormatContext *s, int id)
Definition: utils.c:3817
static int read_data(void *opaque, uint8_t *buf, int buf_size)
Definition: hls.c:1074
#define AVERROR_EOF
End of file.
Definition: error.h:55
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:137
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:1214
int duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1441
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:208
struct rendition ** renditions
Definition: hls.c:174
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1469
struct variant ** variants
Definition: hls.c:170
static AVRational get_timebase(struct playlist *pls)
Definition: hls.c:1597
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:140
Callback for checking whether to abort blocking functions.
Definition: avio.h:50
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:270
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:1605
#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:1485
char video_group[MAX_FIELD_LEN]
Definition: hls.c:163
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:180
int n_renditions
Definition: hls.c:136
static const AVClass hls_class
Definition: hls.c:1821
AVIOInterruptCB * interrupt_callback
Definition: hls.c:181
char bandwidth[20]
Definition: hls.c:283
static void handle_key_args(struct key_info *info, const char *key, int key_len, char **dest, int *dest_len)
Definition: hls.c:340
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:175
int avio_close(AVIOContext *s)
Close the resource accessed by the AVIOContext s and free it.
Definition: aviobuf.c:941
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
int64_t id3_mpegts_timestamp
Definition: hls.c:119
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:196
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1062
Definition: graph2dot.c:48
void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
simple assert() macros that are a bit more flexible than ISO C assert().
int first_packet
Definition: hls.c:178
URLContext * input
Definition: hls.c:95
static int find_timestamp_in_playlist(HLSContext *c, struct playlist *pls, int64_t timestamp, int *seq_no)
Definition: hls.c:1246
uint8_t * data
Definition: id3v2.h:78
int64_t id3_offset
Definition: hls.c:120
int is_id3_timestamped
Definition: hls.c:118
New fields can be added to the end with minor version bumps.
Definition: avformat.h:1206
#define FFMAX(a, b)
Definition: common.h:79
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:1429
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:861
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:450
int live_start_index
Definition: hls.c:177
Definition: hls.c:68
#define AV_DISPOSITION_FORCED
Track should be used during playback by default.
Definition: avformat.h:809
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1329
char group_id[MAX_FIELD_LEN]
Definition: hls.c:149
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:1349
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:246
#define FFMIN(a, b)
Definition: common.h:81
#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
int index
Definition: hls.c:97
int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt, const char *filename, void *logctx, unsigned int offset, unsigned int max_probe_size)
Like av_probe_input_buffer2() but returns 0 on success.
Definition: format.c:334
static void add_renditions_to_variant(HLSContext *c, struct variant *var, enum AVMediaType type, const char *group_id)
Definition: hls.c:1190
static int hls_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: hls.c:1614
uint8_t * id3_buf
Definition: hls.c:121
Definition: hls.c:334
int stream_offset
Definition: hls.c:100
float u
AVDictionary * metadata
Definition: avformat.h:916
static struct variant * new_variant(HLSContext *c, struct variant_info *info, const char *url, const char *base)
Definition: hls.c:290
#define AVFMT_FLAG_CUSTOM_IO
The caller has supplied a custom AVIOContext, don't avio_close() it.
Definition: avformat.h:1392
int ff_get_line(AVIOContext *s, char *buf, int maxlen)
Read a whole line of text from AVIOContext.
Definition: aviobuf.c:698
Usually treated as AVMEDIA_TYPE_DATA.
Definition: avutil.h:192
static void fill_timing_for_id3_timestamped_stream(struct playlist *pls)
Definition: hls.c:1572
struct segment ** segments
Definition: hls.c:107
#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:183
AVPacket pkt
Definition: hls.c:99
uint8_t * owner
Definition: id3v2.h:77
char subtitles_group[MAX_FIELD_LEN]
Definition: hls.c:164
char name[MAX_FIELD_LEN]
Definition: hls.c:361
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:623
#define AV_DISPOSITION_VISUAL_IMPAIRED
stream for visual impaired audiences
Definition: avformat.h:811
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:965
Stream structure.
Definition: avformat.h:842
int id3_changed
Definition: hls.c:125
#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:96
static int read_chomp_line(AVIOContext *s, char *buf, int maxlen)
Definition: hls.c:188
static void parse_id3(AVFormatContext *s, AVIOContext *pb, AVDictionary **metadata, int64_t *dts, ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta **extra_meta)
Definition: hls.c:768
#define AV_DISPOSITION_DEFAULT
Definition: avformat.h:797
int64_t first_timestamp
Definition: hls.c:179
#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:287
enum AVMediaType codec_type
Definition: avcodec.h:1510
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:600
enum PlaylistType type
Definition: hls.c:103
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:252
int av_opt_set_dict(void *obj, AVDictionary **options)
Set all the options from a given dictionary on an object.
Definition: opt.c:1476
char * av_strdup(const char *s)
Duplicate the string s.
Definition: mem.c:267
AVIOContext * pb
I/O context.
Definition: avformat.h:1315
static int parse_playlist(HLSContext *c, const char *url, struct playlist *pls, AVIOContext *in)
Definition: hls.c:547
char url[MAX_URL_SIZE]
Definition: hlsproto.c:54
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:1815
static int hls_read_header(AVFormatContext *s)
Definition: hls.c:1331
void * buf
Definition: avisynth_c.h:553
Definition: url.h:39
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:172
int64_t last_load_time
Definition: hls.c:111
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:108
void * priv_data
Definition: url.h:42
int seek_stream_index
Definition: hls.c:130
PlaylistType
Definition: hls.c:80
int64_t target_duration
Definition: hls.c:104
static int save_avio_options(AVFormatContext *s)
Definition: hls.c:1311
#define AVSEEK_FLAG_BYTE
seeking based on position in bytes
Definition: avformat.h:2278
char uri[MAX_URL_SIZE]
Definition: hls.c:357
AVMediaType
Definition: avutil.h:191
int n_playlists
Definition: hls.c:159
struct playlist * playlist
Definition: hls.c:148
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:918
#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:3686
This structure contains the data a format has to probe a file.
Definition: avformat.h:448
int ff_hex_to_data(uint8_t *data, const char *p)
Parse a string of hexadecimal strings.
Definition: utils.c:4055
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1478
Definition: hls.c:146
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:316
int size
Size of data in bytes.
Definition: buffer.h:93
AVDictionary * metadata
Definition: avformat.h:1212
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:162
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:412
static int recheck_discard_flags(AVFormatContext *s, int first)
Definition: hls.c:1531
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:4108
int64_t seek_timestamp
Definition: hls.c:128
char iv[35]
Definition: hls.c:337
#define OFFSET(x)
Definition: hls.c:1813
char characteristics[MAX_CHARACTERISTICS_LEN]
Definition: hls.c:364
int seek_flags
Definition: hls.c:129
static int open_url(HLSContext *c, URLContext **uc, const char *url, AVDictionary *opts)
Definition: hls.c:532
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:460
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
static int open_input(HLSContext *c, struct playlist *pls)
Definition: hls.c:973
char language[MAX_FIELD_LEN]
Definition: hls.c:150
AVIOContext pb
Definition: hls.c:93
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:335
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:380
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:292
#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:3084
const char * tag
Definition: id3v2.h:56
static double c[64]
int cur_seq_no
Definition: hls.c:176
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:360
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:905
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:1008
static int playlist_in_multiple_variants(HLSContext *c, struct playlist *pls)
Definition: hls.c:1171
AVDictionary * avio_opts
Definition: hls.c:185
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:106
int den
denominator
Definition: rational.h:45
void avformat_close_input(AVFormatContext **s)
Close an opened input AVFormatContext.
Definition: utils.c:3721
#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:1800
static int ensure_playlist(HLSContext *c, struct playlist **pls, const char *url)
Definition: hls.c:488
static int hls_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: hls.c:1720
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:124
char name[MAX_FIELD_LEN]
Definition: hls.c:151
void ff_id3v2_read_dict(AVIOContext *pb, AVDictionary **metadata, const char *magic, ID3v2ExtraMeta **extra_meta)
Read an ID3v2 tag into specified dictionary and retrieve supported extra metadata.
Definition: id3v2.c:1050
char * value
Definition: dict.h:88
int eof_reached
true if eof reached
Definition: avio.h:139
int len
int ff_id3v2_tag_len(const uint8_t *buf)
Get the length of an ID3v2 tag.
Definition: id3v2.c:154
void * priv_data
Format private data.
Definition: avformat.h:1301
AVBufferRef * buf
Definition: id3v2.h:70
AVFormatContext * ctx
Definition: hls.c:98
uint32_t datasize
Definition: id3v2.h:79
struct playlist ** playlists
Definition: hls.c:160
Definition: hls.c:155
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1422
char video[MAX_FIELD_LEN]
Definition: hls.c:286
int64_t duration
Duration of the stream, in AV_TIME_BASE fractional seconds.
Definition: avformat.h:1368
#define av_freep(p)
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:628
#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
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:301
int start_seq_no
Definition: hls.c:105
int stream_index
Definition: avcodec.h:1425
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:884
int64_t duration
Definition: hls.c:69
static void free_variant_list(HLSContext *c)
Definition: hls.c:234
int cur_seq_no
Definition: hls.c:109
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:907
char key_url[MAX_URL_SIZE]
Definition: hls.c:113
static int hls_close(AVFormatContext *s)
Definition: hls.c:1707
char * ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase)
Definition: utils.c:4034
This structure stores compressed data.
Definition: avcodec.h:1400
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:353
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:1416
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:934
#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:158
const char * name
Definition: opengl_enc.c:103
static int select_cur_seq_no(HLSContext *c, struct playlist *pls)
Definition: hls.c:1272