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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  /* main demuxer streams associated with this playlist
104  * indexed by the subdemuxer stream indexes */
107 
108  int finished;
113  struct segment **segments;
116  int64_t cur_seg_offset;
117  int64_t last_load_time;
118 
119  /* Currently active Media Initialization Section */
122  unsigned int init_sec_buf_size;
123  unsigned int init_sec_data_len;
125 
128 
129  /* ID3 timestamp handling (elementary audio streams have ID3 timestamps
130  * (and possibly other ID3 tags) in the beginning of each segment) */
131  int is_id3_timestamped; /* -1: not yet known */
132  int64_t id3_mpegts_timestamp; /* in mpegts tb */
133  int64_t id3_offset; /* in stream original tb */
134  uint8_t* id3_buf; /* temp buffer for id3 parsing */
135  unsigned int id3_buf_size;
136  AVDictionary *id3_initial; /* data from first id3 tag */
137  int id3_found; /* ID3 tag found at some point */
138  int id3_changed; /* ID3 tag data has changed at some point */
139  ID3v2ExtraMeta *id3_deferred_extra; /* stored here until subdemuxer is opened */
140 
141  int64_t seek_timestamp;
143  int seek_stream_index; /* into subdemuxer stream array */
144 
145  /* Renditions associated with this playlist, if any.
146  * Alternative rendition playlists have a single rendition associated
147  * with them, and variant main Media Playlists may have
148  * multiple (playlist-less) renditions associated with them. */
151 
152  /* Media Initialization Sections (EXT-X-MAP) associated with this
153  * playlist, if any. */
156 };
157 
158 /*
159  * Renditions are e.g. alternative subtitle or audio streams.
160  * The rendition may either be an external playlist or it may be
161  * contained in the main Media Playlist of the variant (in which case
162  * playlist is NULL).
163  */
164 struct rendition {
171 };
172 
173 struct variant {
175 
176  /* every variant contains at least the main Media Playlist in index 0 */
178  struct playlist **playlists;
179 
183 };
184 
185 typedef struct HLSContext {
186  AVClass *class;
189  struct variant **variants;
191  struct playlist **playlists;
194 
199  int64_t cur_timestamp;
201  char *user_agent; ///< holds HTTP user agent set as an AVOption to the HTTP protocol context
202  char *cookies; ///< holds HTTP cookie values set in either the initial response or as an AVOption to the HTTP protocol context
203  char *headers; ///< holds HTTP headers set as an AVOption to the HTTP protocol context
204  char *http_proxy; ///< holds the address of the HTTP proxy server
207 } HLSContext;
208 
209 static int read_chomp_line(AVIOContext *s, char *buf, int maxlen)
210 {
211  int len = ff_get_line(s, buf, maxlen);
212  while (len > 0 && av_isspace(buf[len - 1]))
213  buf[--len] = '\0';
214  return len;
215 }
216 
217 static void free_segment_list(struct playlist *pls)
218 {
219  int i;
220  for (i = 0; i < pls->n_segments; i++) {
221  av_freep(&pls->segments[i]->key);
222  av_freep(&pls->segments[i]->url);
223  av_freep(&pls->segments[i]);
224  }
225  av_freep(&pls->segments);
226  pls->n_segments = 0;
227 }
228 
229 static void free_init_section_list(struct playlist *pls)
230 {
231  int i;
232  for (i = 0; i < pls->n_init_sections; i++) {
233  av_freep(&pls->init_sections[i]->url);
234  av_freep(&pls->init_sections[i]);
235  }
236  av_freep(&pls->init_sections);
237  pls->n_init_sections = 0;
238 }
239 
241 {
242  int i;
243  for (i = 0; i < c->n_playlists; i++) {
244  struct playlist *pls = c->playlists[i];
245  free_segment_list(pls);
247  av_freep(&pls->main_streams);
248  av_freep(&pls->renditions);
249  av_freep(&pls->id3_buf);
250  av_dict_free(&pls->id3_initial);
252  av_freep(&pls->init_sec_buf);
253  av_packet_unref(&pls->pkt);
254  av_freep(&pls->pb.buffer);
255  if (pls->input)
256  ff_format_io_close(c->ctx, &pls->input);
257  if (pls->ctx) {
258  pls->ctx->pb = NULL;
259  avformat_close_input(&pls->ctx);
260  }
261  av_free(pls);
262  }
263  av_freep(&c->playlists);
264  av_freep(&c->cookies);
265  av_freep(&c->user_agent);
266  av_freep(&c->headers);
267  av_freep(&c->http_proxy);
268  c->n_playlists = 0;
269 }
270 
272 {
273  int i;
274  for (i = 0; i < c->n_variants; i++) {
275  struct variant *var = c->variants[i];
276  av_freep(&var->playlists);
277  av_free(var);
278  }
279  av_freep(&c->variants);
280  c->n_variants = 0;
281 }
282 
284 {
285  int i;
286  for (i = 0; i < c->n_renditions; i++)
287  av_freep(&c->renditions[i]);
288  av_freep(&c->renditions);
289  c->n_renditions = 0;
290 }
291 
292 /*
293  * Used to reset a statically allocated AVPacket to a clean slate,
294  * containing no data.
295  */
296 static void reset_packet(AVPacket *pkt)
297 {
298  av_init_packet(pkt);
299  pkt->data = NULL;
300 }
301 
302 static struct playlist *new_playlist(HLSContext *c, const char *url,
303  const char *base)
304 {
305  struct playlist *pls = av_mallocz(sizeof(struct playlist));
306  if (!pls)
307  return NULL;
308  reset_packet(&pls->pkt);
309  ff_make_absolute_url(pls->url, sizeof(pls->url), base, url);
311 
312  pls->is_id3_timestamped = -1;
314 
315  dynarray_add(&c->playlists, &c->n_playlists, pls);
316  return pls;
317 }
318 
319 struct variant_info {
320  char bandwidth[20];
321  /* variant group ids: */
325 };
326 
327 static struct variant *new_variant(HLSContext *c, struct variant_info *info,
328  const char *url, const char *base)
329 {
330  struct variant *var;
331  struct playlist *pls;
332 
333  pls = new_playlist(c, url, base);
334  if (!pls)
335  return NULL;
336 
337  var = av_mallocz(sizeof(struct variant));
338  if (!var)
339  return NULL;
340 
341  if (info) {
342  var->bandwidth = atoi(info->bandwidth);
343  strcpy(var->audio_group, info->audio);
344  strcpy(var->video_group, info->video);
345  strcpy(var->subtitles_group, info->subtitles);
346  }
347 
348  dynarray_add(&c->variants, &c->n_variants, var);
349  dynarray_add(&var->playlists, &var->n_playlists, pls);
350  return var;
351 }
352 
353 static void handle_variant_args(struct variant_info *info, const char *key,
354  int key_len, char **dest, int *dest_len)
355 {
356  if (!strncmp(key, "BANDWIDTH=", key_len)) {
357  *dest = info->bandwidth;
358  *dest_len = sizeof(info->bandwidth);
359  } else if (!strncmp(key, "AUDIO=", key_len)) {
360  *dest = info->audio;
361  *dest_len = sizeof(info->audio);
362  } else if (!strncmp(key, "VIDEO=", key_len)) {
363  *dest = info->video;
364  *dest_len = sizeof(info->video);
365  } else if (!strncmp(key, "SUBTITLES=", key_len)) {
366  *dest = info->subtitles;
367  *dest_len = sizeof(info->subtitles);
368  }
369 }
370 
371 struct key_info {
373  char method[11];
374  char iv[35];
375 };
376 
377 static void handle_key_args(struct key_info *info, const char *key,
378  int key_len, char **dest, int *dest_len)
379 {
380  if (!strncmp(key, "METHOD=", key_len)) {
381  *dest = info->method;
382  *dest_len = sizeof(info->method);
383  } else if (!strncmp(key, "URI=", key_len)) {
384  *dest = info->uri;
385  *dest_len = sizeof(info->uri);
386  } else if (!strncmp(key, "IV=", key_len)) {
387  *dest = info->iv;
388  *dest_len = sizeof(info->iv);
389  }
390 }
391 
394  char byterange[32];
395 };
396 
397 static struct segment *new_init_section(struct playlist *pls,
398  struct init_section_info *info,
399  const char *url_base)
400 {
401  struct segment *sec;
402  char *ptr;
403  char tmp_str[MAX_URL_SIZE];
404 
405  if (!info->uri[0])
406  return NULL;
407 
408  sec = av_mallocz(sizeof(*sec));
409  if (!sec)
410  return NULL;
411 
412  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url_base, info->uri);
413  sec->url = av_strdup(tmp_str);
414  if (!sec->url) {
415  av_free(sec);
416  return NULL;
417  }
418 
419  if (info->byterange[0]) {
420  sec->size = atoi(info->byterange);
421  ptr = strchr(info->byterange, '@');
422  if (ptr)
423  sec->url_offset = atoi(ptr+1);
424  } else {
425  /* the entire file is the init section */
426  sec->size = -1;
427  }
428 
429  dynarray_add(&pls->init_sections, &pls->n_init_sections, sec);
430 
431  return sec;
432 }
433 
434 static void handle_init_section_args(struct init_section_info *info, const char *key,
435  int key_len, char **dest, int *dest_len)
436 {
437  if (!strncmp(key, "URI=", key_len)) {
438  *dest = info->uri;
439  *dest_len = sizeof(info->uri);
440  } else if (!strncmp(key, "BYTERANGE=", key_len)) {
441  *dest = info->byterange;
442  *dest_len = sizeof(info->byterange);
443  }
444 }
445 
447  char type[16];
453  char defaultr[4];
454  char forced[4];
456 };
457 
458 static struct rendition *new_rendition(HLSContext *c, struct rendition_info *info,
459  const char *url_base)
460 {
461  struct rendition *rend;
463  char *characteristic;
464  char *chr_ptr;
465  char *saveptr;
466 
467  if (!strcmp(info->type, "AUDIO"))
468  type = AVMEDIA_TYPE_AUDIO;
469  else if (!strcmp(info->type, "VIDEO"))
470  type = AVMEDIA_TYPE_VIDEO;
471  else if (!strcmp(info->type, "SUBTITLES"))
472  type = AVMEDIA_TYPE_SUBTITLE;
473  else if (!strcmp(info->type, "CLOSED-CAPTIONS"))
474  /* CLOSED-CAPTIONS is ignored since we do not support CEA-608 CC in
475  * AVC SEI RBSP anyway */
476  return NULL;
477 
478  if (type == AVMEDIA_TYPE_UNKNOWN)
479  return NULL;
480 
481  /* URI is mandatory for subtitles as per spec */
482  if (type == AVMEDIA_TYPE_SUBTITLE && !info->uri[0])
483  return NULL;
484 
485  /* TODO: handle subtitles (each segment has to parsed separately) */
487  if (type == AVMEDIA_TYPE_SUBTITLE)
488  return NULL;
489 
490  rend = av_mallocz(sizeof(struct rendition));
491  if (!rend)
492  return NULL;
493 
494  dynarray_add(&c->renditions, &c->n_renditions, rend);
495 
496  rend->type = type;
497  strcpy(rend->group_id, info->group_id);
498  strcpy(rend->language, info->language);
499  strcpy(rend->name, info->name);
500 
501  /* add the playlist if this is an external rendition */
502  if (info->uri[0]) {
503  rend->playlist = new_playlist(c, info->uri, url_base);
504  if (rend->playlist)
506  &rend->playlist->n_renditions, rend);
507  }
508 
509  if (info->assoc_language[0]) {
510  int langlen = strlen(rend->language);
511  if (langlen < sizeof(rend->language) - 3) {
512  rend->language[langlen] = ',';
513  strncpy(rend->language + langlen + 1, info->assoc_language,
514  sizeof(rend->language) - langlen - 2);
515  }
516  }
517 
518  if (!strcmp(info->defaultr, "YES"))
520  if (!strcmp(info->forced, "YES"))
522 
523  chr_ptr = info->characteristics;
524  while ((characteristic = av_strtok(chr_ptr, ",", &saveptr))) {
525  if (!strcmp(characteristic, "public.accessibility.describes-music-and-sound"))
527  else if (!strcmp(characteristic, "public.accessibility.describes-video"))
529 
530  chr_ptr = NULL;
531  }
532 
533  return rend;
534 }
535 
536 static void handle_rendition_args(struct rendition_info *info, const char *key,
537  int key_len, char **dest, int *dest_len)
538 {
539  if (!strncmp(key, "TYPE=", key_len)) {
540  *dest = info->type;
541  *dest_len = sizeof(info->type);
542  } else if (!strncmp(key, "URI=", key_len)) {
543  *dest = info->uri;
544  *dest_len = sizeof(info->uri);
545  } else if (!strncmp(key, "GROUP-ID=", key_len)) {
546  *dest = info->group_id;
547  *dest_len = sizeof(info->group_id);
548  } else if (!strncmp(key, "LANGUAGE=", key_len)) {
549  *dest = info->language;
550  *dest_len = sizeof(info->language);
551  } else if (!strncmp(key, "ASSOC-LANGUAGE=", key_len)) {
552  *dest = info->assoc_language;
553  *dest_len = sizeof(info->assoc_language);
554  } else if (!strncmp(key, "NAME=", key_len)) {
555  *dest = info->name;
556  *dest_len = sizeof(info->name);
557  } else if (!strncmp(key, "DEFAULT=", key_len)) {
558  *dest = info->defaultr;
559  *dest_len = sizeof(info->defaultr);
560  } else if (!strncmp(key, "FORCED=", key_len)) {
561  *dest = info->forced;
562  *dest_len = sizeof(info->forced);
563  } else if (!strncmp(key, "CHARACTERISTICS=", key_len)) {
564  *dest = info->characteristics;
565  *dest_len = sizeof(info->characteristics);
566  }
567  /*
568  * ignored:
569  * - AUTOSELECT: client may autoselect based on e.g. system language
570  * - INSTREAM-ID: EIA-608 closed caption number ("CC1".."CC4")
571  */
572 }
573 
574 /* used by parse_playlist to allocate a new variant+playlist when the
575  * playlist is detected to be a Media Playlist (not Master Playlist)
576  * and we have no parent Master Playlist (parsing of which would have
577  * allocated the variant and playlist already)
578  * *pls == NULL => Master Playlist or parentless Media Playlist
579  * *pls != NULL => parented Media Playlist, playlist+variant allocated */
580 static int ensure_playlist(HLSContext *c, struct playlist **pls, const char *url)
581 {
582  if (*pls)
583  return 0;
584  if (!new_variant(c, NULL, url, NULL))
585  return AVERROR(ENOMEM);
586  *pls = c->playlists[c->n_playlists - 1];
587  return 0;
588 }
589 
590 static void update_options(char **dest, const char *name, void *src)
591 {
592  av_freep(dest);
593  av_opt_get(src, name, AV_OPT_SEARCH_CHILDREN, (uint8_t**)dest);
594  if (*dest && !strlen(*dest))
595  av_freep(dest);
596 }
597 
598 static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url,
599  AVDictionary *opts, AVDictionary *opts2, int *is_http)
600 {
601  HLSContext *c = s->priv_data;
602  AVDictionary *tmp = NULL;
603  const char *proto_name = NULL;
604  int ret;
605 
606  av_dict_copy(&tmp, opts, 0);
607  av_dict_copy(&tmp, opts2, 0);
608 
609  if (av_strstart(url, "crypto", NULL)) {
610  if (url[6] == '+' || url[6] == ':')
611  proto_name = avio_find_protocol_name(url + 7);
612  }
613 
614  if (!proto_name)
615  proto_name = avio_find_protocol_name(url);
616 
617  if (!proto_name)
618  return AVERROR_INVALIDDATA;
619 
620  // only http(s) & file are allowed
621  if (!av_strstart(proto_name, "http", NULL) && !av_strstart(proto_name, "file", NULL))
622  return AVERROR_INVALIDDATA;
623  if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':')
624  ;
625  else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':')
626  ;
627  else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))
628  return AVERROR_INVALIDDATA;
629 
630  ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
631  if (ret >= 0) {
632  // update cookies on http response with setcookies.
633  void *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb;
634  update_options(&c->cookies, "cookies", u);
635  av_dict_set(&opts, "cookies", c->cookies, 0);
636  }
637 
638  av_dict_free(&tmp);
639 
640  if (is_http)
641  *is_http = av_strstart(proto_name, "http", NULL);
642 
643  return ret;
644 }
645 
646 static int parse_playlist(HLSContext *c, const char *url,
647  struct playlist *pls, AVIOContext *in)
648 {
649  int ret = 0, is_segment = 0, is_variant = 0;
650  int64_t duration = 0;
651  enum KeyType key_type = KEY_NONE;
652  uint8_t iv[16] = "";
653  int has_iv = 0;
654  char key[MAX_URL_SIZE] = "";
655  char line[MAX_URL_SIZE];
656  const char *ptr;
657  int close_in = 0;
658  int64_t seg_offset = 0;
659  int64_t seg_size = -1;
660  uint8_t *new_url = NULL;
661  struct variant_info variant_info;
662  char tmp_str[MAX_URL_SIZE];
663  struct segment *cur_init_section = NULL;
664 
665  if (!in) {
666 #if 1
668  close_in = 1;
669  /* Some HLS servers don't like being sent the range header */
670  av_dict_set(&opts, "seekable", "0", 0);
671 
672  // broker prior HTTP options that should be consistent across requests
673  av_dict_set(&opts, "user-agent", c->user_agent, 0);
674  av_dict_set(&opts, "cookies", c->cookies, 0);
675  av_dict_set(&opts, "headers", c->headers, 0);
676  av_dict_set(&opts, "http_proxy", c->http_proxy, 0);
677 
678  ret = c->ctx->io_open(c->ctx, &in, url, AVIO_FLAG_READ, &opts);
679  av_dict_free(&opts);
680  if (ret < 0)
681  return ret;
682 #else
683  ret = open_in(c, &in, url);
684  if (ret < 0)
685  return ret;
686  close_in = 1;
687 #endif
688  }
689 
690  if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >= 0)
691  url = new_url;
692 
693  read_chomp_line(in, line, sizeof(line));
694  if (strcmp(line, "#EXTM3U")) {
695  ret = AVERROR_INVALIDDATA;
696  goto fail;
697  }
698 
699  if (pls) {
700  free_segment_list(pls);
701  pls->finished = 0;
702  pls->type = PLS_TYPE_UNSPECIFIED;
703  }
704  while (!avio_feof(in)) {
705  read_chomp_line(in, line, sizeof(line));
706  if (av_strstart(line, "#EXT-X-STREAM-INF:", &ptr)) {
707  is_variant = 1;
708  memset(&variant_info, 0, sizeof(variant_info));
710  &variant_info);
711  } else if (av_strstart(line, "#EXT-X-KEY:", &ptr)) {
712  struct key_info info = {{0}};
714  &info);
715  key_type = KEY_NONE;
716  has_iv = 0;
717  if (!strcmp(info.method, "AES-128"))
718  key_type = KEY_AES_128;
719  if (!strcmp(info.method, "SAMPLE-AES"))
720  key_type = KEY_SAMPLE_AES;
721  if (!strncmp(info.iv, "0x", 2) || !strncmp(info.iv, "0X", 2)) {
722  ff_hex_to_data(iv, info.iv + 2);
723  has_iv = 1;
724  }
725  av_strlcpy(key, info.uri, sizeof(key));
726  } else if (av_strstart(line, "#EXT-X-MEDIA:", &ptr)) {
727  struct rendition_info info = {{0}};
729  &info);
730  new_rendition(c, &info, url);
731  } else if (av_strstart(line, "#EXT-X-TARGETDURATION:", &ptr)) {
732  ret = ensure_playlist(c, &pls, url);
733  if (ret < 0)
734  goto fail;
735  pls->target_duration = atoi(ptr) * AV_TIME_BASE;
736  } else if (av_strstart(line, "#EXT-X-MEDIA-SEQUENCE:", &ptr)) {
737  ret = ensure_playlist(c, &pls, url);
738  if (ret < 0)
739  goto fail;
740  pls->start_seq_no = atoi(ptr);
741  } else if (av_strstart(line, "#EXT-X-PLAYLIST-TYPE:", &ptr)) {
742  ret = ensure_playlist(c, &pls, url);
743  if (ret < 0)
744  goto fail;
745  if (!strcmp(ptr, "EVENT"))
746  pls->type = PLS_TYPE_EVENT;
747  else if (!strcmp(ptr, "VOD"))
748  pls->type = PLS_TYPE_VOD;
749  } else if (av_strstart(line, "#EXT-X-MAP:", &ptr)) {
750  struct init_section_info info = {{0}};
751  ret = ensure_playlist(c, &pls, url);
752  if (ret < 0)
753  goto fail;
755  &info);
756  cur_init_section = new_init_section(pls, &info, url);
757  } else if (av_strstart(line, "#EXT-X-ENDLIST", &ptr)) {
758  if (pls)
759  pls->finished = 1;
760  } else if (av_strstart(line, "#EXTINF:", &ptr)) {
761  is_segment = 1;
762  duration = atof(ptr) * AV_TIME_BASE;
763  } else if (av_strstart(line, "#EXT-X-BYTERANGE:", &ptr)) {
764  seg_size = atoi(ptr);
765  ptr = strchr(ptr, '@');
766  if (ptr)
767  seg_offset = atoi(ptr+1);
768  } else if (av_strstart(line, "#", NULL)) {
769  continue;
770  } else if (line[0]) {
771  if (is_variant) {
772  if (!new_variant(c, &variant_info, line, url)) {
773  ret = AVERROR(ENOMEM);
774  goto fail;
775  }
776  is_variant = 0;
777  }
778  if (is_segment) {
779  struct segment *seg;
780  if (!pls) {
781  if (!new_variant(c, 0, url, NULL)) {
782  ret = AVERROR(ENOMEM);
783  goto fail;
784  }
785  pls = c->playlists[c->n_playlists - 1];
786  }
787  seg = av_malloc(sizeof(struct segment));
788  if (!seg) {
789  ret = AVERROR(ENOMEM);
790  goto fail;
791  }
792  seg->duration = duration;
793  seg->key_type = key_type;
794  if (has_iv) {
795  memcpy(seg->iv, iv, sizeof(iv));
796  } else {
797  int seq = pls->start_seq_no + pls->n_segments;
798  memset(seg->iv, 0, sizeof(seg->iv));
799  AV_WB32(seg->iv + 12, seq);
800  }
801 
802  if (key_type != KEY_NONE) {
803  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, key);
804  seg->key = av_strdup(tmp_str);
805  if (!seg->key) {
806  av_free(seg);
807  ret = AVERROR(ENOMEM);
808  goto fail;
809  }
810  } else {
811  seg->key = NULL;
812  }
813 
814  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, line);
815  seg->url = av_strdup(tmp_str);
816  if (!seg->url) {
817  av_free(seg->key);
818  av_free(seg);
819  ret = AVERROR(ENOMEM);
820  goto fail;
821  }
822 
823  dynarray_add(&pls->segments, &pls->n_segments, seg);
824  is_segment = 0;
825 
826  seg->size = seg_size;
827  if (seg_size >= 0) {
828  seg->url_offset = seg_offset;
829  seg_offset += seg_size;
830  seg_size = -1;
831  } else {
832  seg->url_offset = 0;
833  seg_offset = 0;
834  }
835 
836  seg->init_section = cur_init_section;
837  }
838  }
839  }
840  if (pls)
842 
843 fail:
844  av_free(new_url);
845  if (close_in)
846  ff_format_io_close(c->ctx, &in);
847  return ret;
848 }
849 
850 static struct segment *current_segment(struct playlist *pls)
851 {
852  return pls->segments[pls->cur_seq_no - pls->start_seq_no];
853 }
854 
858 };
859 
860 static int read_from_url(struct playlist *pls, struct segment *seg,
861  uint8_t *buf, int buf_size,
862  enum ReadFromURLMode mode)
863 {
864  int ret;
865 
866  /* limit read if the segment was only a part of a file */
867  if (seg->size >= 0)
868  buf_size = FFMIN(buf_size, seg->size - pls->cur_seg_offset);
869 
870  if (mode == READ_COMPLETE) {
871  ret = avio_read(pls->input, buf, buf_size);
872  if (ret != buf_size)
873  av_log(NULL, AV_LOG_ERROR, "Could not read complete segment.\n");
874  } else
875  ret = avio_read(pls->input, buf, buf_size);
876 
877  if (ret > 0)
878  pls->cur_seg_offset += ret;
879 
880  return ret;
881 }
882 
883 /* Parse the raw ID3 data and pass contents to caller */
885  AVDictionary **metadata, int64_t *dts,
886  ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta **extra_meta)
887 {
888  static const char id3_priv_owner_ts[] = "com.apple.streaming.transportStreamTimestamp";
889  ID3v2ExtraMeta *meta;
890 
891  ff_id3v2_read_dict(pb, metadata, ID3v2_DEFAULT_MAGIC, extra_meta);
892  for (meta = *extra_meta; meta; meta = meta->next) {
893  if (!strcmp(meta->tag, "PRIV")) {
894  ID3v2ExtraMetaPRIV *priv = meta->data;
895  if (priv->datasize == 8 && !strcmp(priv->owner, id3_priv_owner_ts)) {
896  /* 33-bit MPEG timestamp */
897  int64_t ts = AV_RB64(priv->data);
898  av_log(s, AV_LOG_DEBUG, "HLS ID3 audio timestamp %"PRId64"\n", ts);
899  if ((ts & ~((1ULL << 33) - 1)) == 0)
900  *dts = ts;
901  else
902  av_log(s, AV_LOG_ERROR, "Invalid HLS ID3 audio timestamp %"PRId64"\n", ts);
903  }
904  } else if (!strcmp(meta->tag, "APIC") && apic)
905  *apic = meta->data;
906  }
907 }
908 
909 /* Check if the ID3 metadata contents have changed */
910 static int id3_has_changed_values(struct playlist *pls, AVDictionary *metadata,
911  ID3v2ExtraMetaAPIC *apic)
912 {
913  AVDictionaryEntry *entry = NULL;
914  AVDictionaryEntry *oldentry;
915  /* check that no keys have changed values */
916  while ((entry = av_dict_get(metadata, "", entry, AV_DICT_IGNORE_SUFFIX))) {
917  oldentry = av_dict_get(pls->id3_initial, entry->key, NULL, AV_DICT_MATCH_CASE);
918  if (!oldentry || strcmp(oldentry->value, entry->value) != 0)
919  return 1;
920  }
921 
922  /* check if apic appeared */
923  if (apic && (pls->ctx->nb_streams != 2 || !pls->ctx->streams[1]->attached_pic.data))
924  return 1;
925 
926  if (apic) {
927  int size = pls->ctx->streams[1]->attached_pic.size;
928  if (size != apic->buf->size - AV_INPUT_BUFFER_PADDING_SIZE)
929  return 1;
930 
931  if (memcmp(apic->buf->data, pls->ctx->streams[1]->attached_pic.data, size) != 0)
932  return 1;
933  }
934 
935  return 0;
936 }
937 
938 /* Parse ID3 data and handle the found data */
939 static void handle_id3(AVIOContext *pb, struct playlist *pls)
940 {
941  AVDictionary *metadata = NULL;
942  ID3v2ExtraMetaAPIC *apic = NULL;
943  ID3v2ExtraMeta *extra_meta = NULL;
944  int64_t timestamp = AV_NOPTS_VALUE;
945 
946  parse_id3(pls->ctx, pb, &metadata, &timestamp, &apic, &extra_meta);
947 
948  if (timestamp != AV_NOPTS_VALUE) {
949  pls->id3_mpegts_timestamp = timestamp;
950  pls->id3_offset = 0;
951  }
952 
953  if (!pls->id3_found) {
954  /* initial ID3 tags */
956  pls->id3_found = 1;
957 
958  /* get picture attachment and set text metadata */
959  if (pls->ctx->nb_streams)
960  ff_id3v2_parse_apic(pls->ctx, &extra_meta);
961  else
962  /* demuxer not yet opened, defer picture attachment */
963  pls->id3_deferred_extra = extra_meta;
964 
965  av_dict_copy(&pls->ctx->metadata, metadata, 0);
966  pls->id3_initial = metadata;
967 
968  } else {
969  if (!pls->id3_changed && id3_has_changed_values(pls, metadata, apic)) {
970  avpriv_report_missing_feature(pls->ctx, "Changing ID3 metadata in HLS audio elementary stream");
971  pls->id3_changed = 1;
972  }
973  av_dict_free(&metadata);
974  }
975 
976  if (!pls->id3_deferred_extra)
977  ff_id3v2_free_extra_meta(&extra_meta);
978 }
979 
980 static void intercept_id3(struct playlist *pls, uint8_t *buf,
981  int buf_size, int *len)
982 {
983  /* intercept id3 tags, we do not want to pass them to the raw
984  * demuxer on all segment switches */
985  int bytes;
986  int id3_buf_pos = 0;
987  int fill_buf = 0;
988  struct segment *seg = current_segment(pls);
989 
990  /* gather all the id3 tags */
991  while (1) {
992  /* see if we can retrieve enough data for ID3 header */
993  if (*len < ID3v2_HEADER_SIZE && buf_size >= ID3v2_HEADER_SIZE) {
994  bytes = read_from_url(pls, seg, buf + *len, ID3v2_HEADER_SIZE - *len, READ_COMPLETE);
995  if (bytes > 0) {
996 
997  if (bytes == ID3v2_HEADER_SIZE - *len)
998  /* no EOF yet, so fill the caller buffer again after
999  * we have stripped the ID3 tags */
1000  fill_buf = 1;
1001 
1002  *len += bytes;
1003 
1004  } else if (*len <= 0) {
1005  /* error/EOF */
1006  *len = bytes;
1007  fill_buf = 0;
1008  }
1009  }
1010 
1011  if (*len < ID3v2_HEADER_SIZE)
1012  break;
1013 
1014  if (ff_id3v2_match(buf, ID3v2_DEFAULT_MAGIC)) {
1015  int64_t maxsize = seg->size >= 0 ? seg->size : 1024*1024;
1016  int taglen = ff_id3v2_tag_len(buf);
1017  int tag_got_bytes = FFMIN(taglen, *len);
1018  int remaining = taglen - tag_got_bytes;
1019 
1020  if (taglen > maxsize) {
1021  av_log(pls->ctx, AV_LOG_ERROR, "Too large HLS ID3 tag (%d > %"PRId64" bytes)\n",
1022  taglen, maxsize);
1023  break;
1024  }
1025 
1026  /*
1027  * Copy the id3 tag to our temporary id3 buffer.
1028  * We could read a small id3 tag directly without memcpy, but
1029  * we would still need to copy the large tags, and handling
1030  * both of those cases together with the possibility for multiple
1031  * tags would make the handling a bit complex.
1032  */
1033  pls->id3_buf = av_fast_realloc(pls->id3_buf, &pls->id3_buf_size, id3_buf_pos + taglen);
1034  if (!pls->id3_buf)
1035  break;
1036  memcpy(pls->id3_buf + id3_buf_pos, buf, tag_got_bytes);
1037  id3_buf_pos += tag_got_bytes;
1038 
1039  /* strip the intercepted bytes */
1040  *len -= tag_got_bytes;
1041  memmove(buf, buf + tag_got_bytes, *len);
1042  av_log(pls->ctx, AV_LOG_DEBUG, "Stripped %d HLS ID3 bytes\n", tag_got_bytes);
1043 
1044  if (remaining > 0) {
1045  /* read the rest of the tag in */
1046  if (read_from_url(pls, seg, pls->id3_buf + id3_buf_pos, remaining, READ_COMPLETE) != remaining)
1047  break;
1048  id3_buf_pos += remaining;
1049  av_log(pls->ctx, AV_LOG_DEBUG, "Stripped additional %d HLS ID3 bytes\n", remaining);
1050  }
1051 
1052  } else {
1053  /* no more ID3 tags */
1054  break;
1055  }
1056  }
1057 
1058  /* re-fill buffer for the caller unless EOF */
1059  if (*len >= 0 && (fill_buf || *len == 0)) {
1060  bytes = read_from_url(pls, seg, buf + *len, buf_size - *len, READ_NORMAL);
1061 
1062  /* ignore error if we already had some data */
1063  if (bytes >= 0)
1064  *len += bytes;
1065  else if (*len == 0)
1066  *len = bytes;
1067  }
1068 
1069  if (pls->id3_buf) {
1070  /* Now parse all the ID3 tags */
1071  AVIOContext id3ioctx;
1072  ffio_init_context(&id3ioctx, pls->id3_buf, id3_buf_pos, 0, NULL, NULL, NULL, NULL);
1073  handle_id3(&id3ioctx, pls);
1074  }
1075 
1076  if (pls->is_id3_timestamped == -1)
1078 }
1079 
1080 static int open_input(HLSContext *c, struct playlist *pls, struct segment *seg)
1081 {
1082  AVDictionary *opts = NULL;
1083  int ret;
1084  int is_http = 0;
1085 
1086  // broker prior HTTP options that should be consistent across requests
1087  av_dict_set(&opts, "user-agent", c->user_agent, 0);
1088  av_dict_set(&opts, "cookies", c->cookies, 0);
1089  av_dict_set(&opts, "headers", c->headers, 0);
1090  av_dict_set(&opts, "http_proxy", c->http_proxy, 0);
1091  av_dict_set(&opts, "seekable", "0", 0);
1092 
1093  if (seg->size >= 0) {
1094  /* try to restrict the HTTP request to the part we want
1095  * (if this is in fact a HTTP request) */
1096  av_dict_set_int(&opts, "offset", seg->url_offset, 0);
1097  av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
1098  }
1099 
1100  av_log(pls->parent, AV_LOG_VERBOSE, "HLS request for url '%s', offset %"PRId64", playlist %d\n",
1101  seg->url, seg->url_offset, pls->index);
1102 
1103  if (seg->key_type == KEY_NONE) {
1104  ret = open_url(pls->parent, &pls->input, seg->url, c->avio_opts, opts, &is_http);
1105  } else if (seg->key_type == KEY_AES_128) {
1106  AVDictionary *opts2 = NULL;
1107  char iv[33], key[33], url[MAX_URL_SIZE];
1108  if (strcmp(seg->key, pls->key_url)) {
1109  AVIOContext *pb;
1110  if (open_url(pls->parent, &pb, seg->key, c->avio_opts, opts, NULL) == 0) {
1111  ret = avio_read(pb, pls->key, sizeof(pls->key));
1112  if (ret != sizeof(pls->key)) {
1113  av_log(NULL, AV_LOG_ERROR, "Unable to read key file %s\n",
1114  seg->key);
1115  }
1116  ff_format_io_close(pls->parent, &pb);
1117  } else {
1118  av_log(NULL, AV_LOG_ERROR, "Unable to open key file %s\n",
1119  seg->key);
1120  }
1121  av_strlcpy(pls->key_url, seg->key, sizeof(pls->key_url));
1122  }
1123  ff_data_to_hex(iv, seg->iv, sizeof(seg->iv), 0);
1124  ff_data_to_hex(key, pls->key, sizeof(pls->key), 0);
1125  iv[32] = key[32] = '\0';
1126  if (strstr(seg->url, "://"))
1127  snprintf(url, sizeof(url), "crypto+%s", seg->url);
1128  else
1129  snprintf(url, sizeof(url), "crypto:%s", seg->url);
1130 
1131  av_dict_copy(&opts2, c->avio_opts, 0);
1132  av_dict_set(&opts2, "key", key, 0);
1133  av_dict_set(&opts2, "iv", iv, 0);
1134 
1135  ret = open_url(pls->parent, &pls->input, url, opts2, opts, &is_http);
1136 
1137  av_dict_free(&opts2);
1138 
1139  if (ret < 0) {
1140  goto cleanup;
1141  }
1142  ret = 0;
1143  } else if (seg->key_type == KEY_SAMPLE_AES) {
1144  av_log(pls->parent, AV_LOG_ERROR,
1145  "SAMPLE-AES encryption is not supported yet\n");
1146  ret = AVERROR_PATCHWELCOME;
1147  }
1148  else
1149  ret = AVERROR(ENOSYS);
1150 
1151  /* Seek to the requested position. If this was a HTTP request, the offset
1152  * should already be where want it to, but this allows e.g. local testing
1153  * without a HTTP server.
1154  *
1155  * This is not done for HTTP at all as avio_seek() does internal bookkeeping
1156  * of file offset which is out-of-sync with the actual offset when "offset"
1157  * AVOption is used with http protocol, causing the seek to not be a no-op
1158  * as would be expected. Wrong offset received from the server will not be
1159  * noticed without the call, though.
1160  */
1161  if (ret == 0 && !is_http && seg->key_type == KEY_NONE && seg->url_offset) {
1162  int64_t seekret = avio_seek(pls->input, seg->url_offset, SEEK_SET);
1163  if (seekret < 0) {
1164  av_log(pls->parent, AV_LOG_ERROR, "Unable to seek to offset %"PRId64" of HLS segment '%s'\n", seg->url_offset, seg->url);
1165  ret = seekret;
1166  ff_format_io_close(pls->parent, &pls->input);
1167  }
1168  }
1169 
1170 cleanup:
1171  av_dict_free(&opts);
1172  pls->cur_seg_offset = 0;
1173  return ret;
1174 }
1175 
1176 static int update_init_section(struct playlist *pls, struct segment *seg)
1177 {
1178  static const int max_init_section_size = 1024*1024;
1179  HLSContext *c = pls->parent->priv_data;
1180  int64_t sec_size;
1181  int64_t urlsize;
1182  int ret;
1183 
1184  if (seg->init_section == pls->cur_init_section)
1185  return 0;
1186 
1187  pls->cur_init_section = NULL;
1188 
1189  if (!seg->init_section)
1190  return 0;
1191 
1192  ret = open_input(c, pls, seg->init_section);
1193  if (ret < 0) {
1195  "Failed to open an initialization section in playlist %d\n",
1196  pls->index);
1197  return ret;
1198  }
1199 
1200  if (seg->init_section->size >= 0)
1201  sec_size = seg->init_section->size;
1202  else if ((urlsize = avio_size(pls->input)) >= 0)
1203  sec_size = urlsize;
1204  else
1205  sec_size = max_init_section_size;
1206 
1207  av_log(pls->parent, AV_LOG_DEBUG,
1208  "Downloading an initialization section of size %"PRId64"\n",
1209  sec_size);
1210 
1211  sec_size = FFMIN(sec_size, max_init_section_size);
1212 
1213  av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size);
1214 
1215  ret = read_from_url(pls, seg->init_section, pls->init_sec_buf,
1217  ff_format_io_close(pls->parent, &pls->input);
1218 
1219  if (ret < 0)
1220  return ret;
1221 
1222  pls->cur_init_section = seg->init_section;
1223  pls->init_sec_data_len = ret;
1224  pls->init_sec_buf_read_offset = 0;
1225 
1226  /* spec says audio elementary streams do not have media initialization
1227  * sections, so there should be no ID3 timestamps */
1228  pls->is_id3_timestamped = 0;
1229 
1230  return 0;
1231 }
1232 
1233 static int64_t default_reload_interval(struct playlist *pls)
1234 {
1235  return pls->n_segments > 0 ?
1236  pls->segments[pls->n_segments - 1]->duration :
1237  pls->target_duration;
1238 }
1239 
1240 static int read_data(void *opaque, uint8_t *buf, int buf_size)
1241 {
1242  struct playlist *v = opaque;
1243  HLSContext *c = v->parent->priv_data;
1244  int ret, i;
1245  int just_opened = 0;
1246 
1247 restart:
1248  if (!v->needed)
1249  return AVERROR_EOF;
1250 
1251  if (!v->input) {
1252  int64_t reload_interval;
1253  struct segment *seg;
1254 
1255  /* Check that the playlist is still needed before opening a new
1256  * segment. */
1257  if (v->ctx && v->ctx->nb_streams) {
1258  v->needed = 0;
1259  for (i = 0; i < v->n_main_streams; i++) {
1260  if (v->main_streams[i]->discard < AVDISCARD_ALL) {
1261  v->needed = 1;
1262  break;
1263  }
1264  }
1265  }
1266  if (!v->needed) {
1267  av_log(v->parent, AV_LOG_INFO, "No longer receiving playlist %d\n",
1268  v->index);
1269  return AVERROR_EOF;
1270  }
1271 
1272  /* If this is a live stream and the reload interval has elapsed since
1273  * the last playlist reload, reload the playlists now. */
1274  reload_interval = default_reload_interval(v);
1275 
1276 reload:
1277  if (!v->finished &&
1278  av_gettime_relative() - v->last_load_time >= reload_interval) {
1279  if ((ret = parse_playlist(c, v->url, v, NULL)) < 0) {
1280  av_log(v->parent, AV_LOG_WARNING, "Failed to reload playlist %d\n",
1281  v->index);
1282  return ret;
1283  }
1284  /* If we need to reload the playlist again below (if
1285  * there's still no more segments), switch to a reload
1286  * interval of half the target duration. */
1287  reload_interval = v->target_duration / 2;
1288  }
1289  if (v->cur_seq_no < v->start_seq_no) {
1291  "skipping %d segments ahead, expired from playlists\n",
1292  v->start_seq_no - v->cur_seq_no);
1293  v->cur_seq_no = v->start_seq_no;
1294  }
1295  if (v->cur_seq_no >= v->start_seq_no + v->n_segments) {
1296  if (v->finished)
1297  return AVERROR_EOF;
1298  while (av_gettime_relative() - v->last_load_time < reload_interval) {
1300  return AVERROR_EXIT;
1301  av_usleep(100*1000);
1302  }
1303  /* Enough time has elapsed since the last reload */
1304  goto reload;
1305  }
1306 
1307  seg = current_segment(v);
1308 
1309  /* load/update Media Initialization Section, if any */
1310  ret = update_init_section(v, seg);
1311  if (ret)
1312  return ret;
1313 
1314  ret = open_input(c, v, seg);
1315  if (ret < 0) {
1317  return AVERROR_EXIT;
1318  av_log(v->parent, AV_LOG_WARNING, "Failed to open segment of playlist %d\n",
1319  v->index);
1320  v->cur_seq_no += 1;
1321  goto reload;
1322  }
1323  just_opened = 1;
1324  }
1325 
1327  /* Push init section out first before first actual segment */
1328  int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size);
1329  memcpy(buf, v->init_sec_buf, copy_size);
1330  v->init_sec_buf_read_offset += copy_size;
1331  return copy_size;
1332  }
1333 
1334  ret = read_from_url(v, current_segment(v), buf, buf_size, READ_NORMAL);
1335  if (ret > 0) {
1336  if (just_opened && v->is_id3_timestamped != 0) {
1337  /* Intercept ID3 tags here, elementary audio streams are required
1338  * to convey timestamps using them in the beginning of each segment. */
1339  intercept_id3(v, buf, buf_size, &ret);
1340  }
1341 
1342  return ret;
1343  }
1344  ff_format_io_close(v->parent, &v->input);
1345  v->cur_seq_no++;
1346 
1347  c->cur_seq_no = v->cur_seq_no;
1348 
1349  goto restart;
1350 }
1351 
1352 static void add_renditions_to_variant(HLSContext *c, struct variant *var,
1353  enum AVMediaType type, const char *group_id)
1354 {
1355  int i;
1356 
1357  for (i = 0; i < c->n_renditions; i++) {
1358  struct rendition *rend = c->renditions[i];
1359 
1360  if (rend->type == type && !strcmp(rend->group_id, group_id)) {
1361 
1362  if (rend->playlist)
1363  /* rendition is an external playlist
1364  * => add the playlist to the variant */
1365  dynarray_add(&var->playlists, &var->n_playlists, rend->playlist);
1366  else
1367  /* rendition is part of the variant main Media Playlist
1368  * => add the rendition to the main Media Playlist */
1369  dynarray_add(&var->playlists[0]->renditions,
1370  &var->playlists[0]->n_renditions,
1371  rend);
1372  }
1373  }
1374 }
1375 
1377  enum AVMediaType type)
1378 {
1379  int rend_idx = 0;
1380  int i;
1381 
1382  for (i = 0; i < pls->n_main_streams; i++) {
1383  AVStream *st = pls->main_streams[i];
1384 
1385  if (st->codecpar->codec_type != type)
1386  continue;
1387 
1388  for (; rend_idx < pls->n_renditions; rend_idx++) {
1389  struct rendition *rend = pls->renditions[rend_idx];
1390 
1391  if (rend->type != type)
1392  continue;
1393 
1394  if (rend->language[0])
1395  av_dict_set(&st->metadata, "language", rend->language, 0);
1396  if (rend->name[0])
1397  av_dict_set(&st->metadata, "comment", rend->name, 0);
1398 
1399  st->disposition |= rend->disposition;
1400  }
1401  if (rend_idx >=pls->n_renditions)
1402  break;
1403  }
1404 }
1405 
1406 /* if timestamp was in valid range: returns 1 and sets seq_no
1407  * if not: returns 0 and sets seq_no to closest segment */
1409  int64_t timestamp, int *seq_no)
1410 {
1411  int i;
1412  int64_t pos = c->first_timestamp == AV_NOPTS_VALUE ?
1413  0 : c->first_timestamp;
1414 
1415  if (timestamp < pos) {
1416  *seq_no = pls->start_seq_no;
1417  return 0;
1418  }
1419 
1420  for (i = 0; i < pls->n_segments; i++) {
1421  int64_t diff = pos + pls->segments[i]->duration - timestamp;
1422  if (diff > 0) {
1423  *seq_no = pls->start_seq_no + i;
1424  return 1;
1425  }
1426  pos += pls->segments[i]->duration;
1427  }
1428 
1429  *seq_no = pls->start_seq_no + pls->n_segments - 1;
1430 
1431  return 0;
1432 }
1433 
1434 static int select_cur_seq_no(HLSContext *c, struct playlist *pls)
1435 {
1436  int seq_no;
1437 
1438  if (!pls->finished && !c->first_packet &&
1440  /* reload the playlist since it was suspended */
1441  parse_playlist(c, pls->url, pls, NULL);
1442 
1443  /* If playback is already in progress (we are just selecting a new
1444  * playlist) and this is a complete file, find the matching segment
1445  * by counting durations. */
1446  if (pls->finished && c->cur_timestamp != AV_NOPTS_VALUE) {
1447  find_timestamp_in_playlist(c, pls, c->cur_timestamp, &seq_no);
1448  return seq_no;
1449  }
1450 
1451  if (!pls->finished) {
1452  if (!c->first_packet && /* we are doing a segment selection during playback */
1453  c->cur_seq_no >= pls->start_seq_no &&
1454  c->cur_seq_no < pls->start_seq_no + pls->n_segments)
1455  /* While spec 3.4.3 says that we cannot assume anything about the
1456  * content at the same sequence number on different playlists,
1457  * in practice this seems to work and doing it otherwise would
1458  * require us to download a segment to inspect its timestamps. */
1459  return c->cur_seq_no;
1460 
1461  /* If this is a live stream, start live_start_index segments from the
1462  * start or end */
1463  if (c->live_start_index < 0)
1464  return pls->start_seq_no + FFMAX(pls->n_segments + c->live_start_index, 0);
1465  else
1466  return pls->start_seq_no + FFMIN(c->live_start_index, pls->n_segments - 1);
1467  }
1468 
1469  /* Otherwise just start on the first segment. */
1470  return pls->start_seq_no;
1471 }
1472 
1474 {
1475  HLSContext *c = s->priv_data;
1476  static const char *opts[] = {
1477  "headers", "http_proxy", "user_agent", "user-agent", "cookies", NULL };
1478  const char **opt = opts;
1479  uint8_t *buf;
1480  int ret = 0;
1481 
1482  while (*opt) {
1483  if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN | AV_OPT_ALLOW_NULL, &buf) >= 0) {
1484  ret = av_dict_set(&c->avio_opts, *opt, buf,
1486  if (ret < 0)
1487  return ret;
1488  }
1489  opt++;
1490  }
1491 
1492  return ret;
1493 }
1494 
1495 static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url,
1496  int flags, AVDictionary **opts)
1497 {
1498  av_log(s, AV_LOG_ERROR,
1499  "A HLS playlist item '%s' referred to an external file '%s'. "
1500  "Opening this file was forbidden for security reasons\n",
1501  s->filename, url);
1502  return AVERROR(EPERM);
1503 }
1504 
1505 static void add_stream_to_programs(AVFormatContext *s, struct playlist *pls, AVStream *stream)
1506 {
1507  HLSContext *c = s->priv_data;
1508  int i, j;
1509  int bandwidth = -1;
1510 
1511  for (i = 0; i < c->n_variants; i++) {
1512  struct variant *v = c->variants[i];
1513 
1514  for (j = 0; j < v->n_playlists; j++) {
1515  if (v->playlists[j] != pls)
1516  continue;
1517 
1518  av_program_add_stream_index(s, i, stream->index);
1519 
1520  if (bandwidth < 0)
1521  bandwidth = v->bandwidth;
1522  else if (bandwidth != v->bandwidth)
1523  bandwidth = -1; /* stream in multiple variants with different bandwidths */
1524  }
1525  }
1526 
1527  if (bandwidth >= 0)
1528  av_dict_set_int(&stream->metadata, "variant_bitrate", bandwidth, 0);
1529 }
1530 
1531 /* add new subdemuxer streams to our context, if any */
1533 {
1534  while (pls->n_main_streams < pls->ctx->nb_streams) {
1535  int ist_idx = pls->n_main_streams;
1536  AVStream *st = avformat_new_stream(s, NULL);
1537  AVStream *ist = pls->ctx->streams[ist_idx];
1538 
1539  if (!st)
1540  return AVERROR(ENOMEM);
1541 
1542  st->id = pls->index;
1543 
1545 
1546  if (pls->is_id3_timestamped) /* custom timestamps via id3 */
1547  avpriv_set_pts_info(st, 33, 1, MPEG_TIME_BASE);
1548  else
1550 
1551  dynarray_add(&pls->main_streams, &pls->n_main_streams, st);
1552 
1553  add_stream_to_programs(s, pls, st);
1554  }
1555 
1556  return 0;
1557 }
1558 
1560 {
1561  HLSContext *c = s->priv_data;
1562  int flag_needed = 0;
1563  int i;
1564 
1565  for (i = 0; i < c->n_playlists; i++) {
1566  struct playlist *pls = c->playlists[i];
1567 
1568  if (pls->has_noheader_flag) {
1569  flag_needed = 1;
1570  break;
1571  }
1572  }
1573 
1574  if (flag_needed)
1576  else
1578 }
1579 
1581 {
1582  void *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb;
1583  HLSContext *c = s->priv_data;
1584  int ret = 0, i;
1585  int highest_cur_seq_no = 0;
1586 
1587  c->ctx = s;
1588  c->interrupt_callback = &s->interrupt_callback;
1589  c->strict_std_compliance = s->strict_std_compliance;
1590 
1591  c->first_packet = 1;
1592  c->first_timestamp = AV_NOPTS_VALUE;
1593  c->cur_timestamp = AV_NOPTS_VALUE;
1594 
1595  if (u) {
1596  // get the previous user agent & set back to null if string size is zero
1597  update_options(&c->user_agent, "user-agent", u);
1598 
1599  // get the previous cookies & set back to null if string size is zero
1600  update_options(&c->cookies, "cookies", u);
1601 
1602  // get the previous headers & set back to null if string size is zero
1603  update_options(&c->headers, "headers", u);
1604 
1605  // get the previous http proxt & set back to null if string size is zero
1606  update_options(&c->http_proxy, "http_proxy", u);
1607  }
1608 
1609  if ((ret = parse_playlist(c, s->filename, NULL, s->pb)) < 0)
1610  goto fail;
1611 
1612  if ((ret = save_avio_options(s)) < 0)
1613  goto fail;
1614 
1615  /* Some HLS servers don't like being sent the range header */
1616  av_dict_set(&c->avio_opts, "seekable", "0", 0);
1617 
1618  if (c->n_variants == 0) {
1619  av_log(NULL, AV_LOG_WARNING, "Empty playlist\n");
1620  ret = AVERROR_EOF;
1621  goto fail;
1622  }
1623  /* If the playlist only contained playlists (Master Playlist),
1624  * parse each individual playlist. */
1625  if (c->n_playlists > 1 || c->playlists[0]->n_segments == 0) {
1626  for (i = 0; i < c->n_playlists; i++) {
1627  struct playlist *pls = c->playlists[i];
1628  if ((ret = parse_playlist(c, pls->url, pls, NULL)) < 0)
1629  goto fail;
1630  }
1631  }
1632 
1633  if (c->variants[0]->playlists[0]->n_segments == 0) {
1634  av_log(NULL, AV_LOG_WARNING, "Empty playlist\n");
1635  ret = AVERROR_EOF;
1636  goto fail;
1637  }
1638 
1639  /* If this isn't a live stream, calculate the total duration of the
1640  * stream. */
1641  if (c->variants[0]->playlists[0]->finished) {
1642  int64_t duration = 0;
1643  for (i = 0; i < c->variants[0]->playlists[0]->n_segments; i++)
1644  duration += c->variants[0]->playlists[0]->segments[i]->duration;
1645  s->duration = duration;
1646  }
1647 
1648  /* Associate renditions with variants */
1649  for (i = 0; i < c->n_variants; i++) {
1650  struct variant *var = c->variants[i];
1651 
1652  if (var->audio_group[0])
1654  if (var->video_group[0])
1656  if (var->subtitles_group[0])
1658  }
1659 
1660  /* Create a program for each variant */
1661  for (i = 0; i < c->n_variants; i++) {
1662  struct variant *v = c->variants[i];
1663  AVProgram *program;
1664 
1665  program = av_new_program(s, i);
1666  if (!program)
1667  goto fail;
1668  av_dict_set_int(&program->metadata, "variant_bitrate", v->bandwidth, 0);
1669  }
1670 
1671  /* Select the starting segments */
1672  for (i = 0; i < c->n_playlists; i++) {
1673  struct playlist *pls = c->playlists[i];
1674 
1675  if (pls->n_segments == 0)
1676  continue;
1677 
1678  pls->cur_seq_no = select_cur_seq_no(c, pls);
1679  highest_cur_seq_no = FFMAX(highest_cur_seq_no, pls->cur_seq_no);
1680  }
1681 
1682  /* Open the demuxer for each playlist */
1683  for (i = 0; i < c->n_playlists; i++) {
1684  struct playlist *pls = c->playlists[i];
1685  AVInputFormat *in_fmt = NULL;
1686 
1687  if (!(pls->ctx = avformat_alloc_context())) {
1688  ret = AVERROR(ENOMEM);
1689  goto fail;
1690  }
1691 
1692  if (pls->n_segments == 0)
1693  continue;
1694 
1695  pls->index = i;
1696  pls->needed = 1;
1697  pls->parent = s;
1698 
1699  /*
1700  * If this is a live stream and this playlist looks like it is one segment
1701  * behind, try to sync it up so that every substream starts at the same
1702  * time position (so e.g. avformat_find_stream_info() will see packets from
1703  * all active streams within the first few seconds). This is not very generic,
1704  * though, as the sequence numbers are technically independent.
1705  */
1706  if (!pls->finished && pls->cur_seq_no == highest_cur_seq_no - 1 &&
1707  highest_cur_seq_no < pls->start_seq_no + pls->n_segments) {
1708  pls->cur_seq_no = highest_cur_seq_no;
1709  }
1710 
1712  if (!pls->read_buffer){
1713  ret = AVERROR(ENOMEM);
1714  avformat_free_context(pls->ctx);
1715  pls->ctx = NULL;
1716  goto fail;
1717  }
1718  ffio_init_context(&pls->pb, pls->read_buffer, INITIAL_BUFFER_SIZE, 0, pls,
1719  read_data, NULL, NULL);
1720  pls->pb.seekable = 0;
1721  ret = av_probe_input_buffer(&pls->pb, &in_fmt, pls->segments[0]->url,
1722  NULL, 0, 0);
1723  if (ret < 0) {
1724  /* Free the ctx - it isn't initialized properly at this point,
1725  * so avformat_close_input shouldn't be called. If
1726  * avformat_open_input fails below, it frees and zeros the
1727  * context, so it doesn't need any special treatment like this. */
1728  av_log(s, AV_LOG_ERROR, "Error when loading first segment '%s'\n", pls->segments[0]->url);
1729  avformat_free_context(pls->ctx);
1730  pls->ctx = NULL;
1731  goto fail;
1732  }
1733  pls->ctx->pb = &pls->pb;
1734  pls->ctx->io_open = nested_io_open;
1735 
1736  if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
1737  goto fail;
1738 
1739  ret = avformat_open_input(&pls->ctx, pls->segments[0]->url, in_fmt, NULL);
1740  if (ret < 0)
1741  goto fail;
1742 
1743  if (pls->id3_deferred_extra && pls->ctx->nb_streams == 1) {
1747  pls->id3_deferred_extra = NULL;
1748  }
1749 
1750  if (pls->is_id3_timestamped == -1)
1751  av_log(s, AV_LOG_WARNING, "No expected HTTP requests have been made\n");
1752 
1753  /*
1754  * For ID3 timestamped raw audio streams we need to detect the packet
1755  * durations to calculate timestamps in fill_timing_for_id3_timestamped_stream(),
1756  * but for other streams we can rely on our user calling avformat_find_stream_info()
1757  * on us if they want to.
1758  */
1759  if (pls->is_id3_timestamped) {
1760  ret = avformat_find_stream_info(pls->ctx, NULL);
1761  if (ret < 0)
1762  goto fail;
1763  }
1764 
1765  pls->has_noheader_flag = !!(pls->ctx->ctx_flags & AVFMTCTX_NOHEADER);
1766 
1767  /* Create new AVStreams for each stream in this playlist */
1768  ret = update_streams_from_subdemuxer(s, pls);
1769  if (ret < 0)
1770  goto fail;
1771 
1775  }
1776 
1778 
1779  return 0;
1780 fail:
1784  return ret;
1785 }
1786 
1787 static int recheck_discard_flags(AVFormatContext *s, int first)
1788 {
1789  HLSContext *c = s->priv_data;
1790  int i, changed = 0;
1791 
1792  /* Check if any new streams are needed */
1793  for (i = 0; i < c->n_playlists; i++)
1794  c->playlists[i]->cur_needed = 0;
1795 
1796  for (i = 0; i < s->nb_streams; i++) {
1797  AVStream *st = s->streams[i];
1798  struct playlist *pls = c->playlists[s->streams[i]->id];
1799  if (st->discard < AVDISCARD_ALL)
1800  pls->cur_needed = 1;
1801  }
1802  for (i = 0; i < c->n_playlists; i++) {
1803  struct playlist *pls = c->playlists[i];
1804  if (pls->cur_needed && !pls->needed) {
1805  pls->needed = 1;
1806  changed = 1;
1807  pls->cur_seq_no = select_cur_seq_no(c, pls);
1808  pls->pb.eof_reached = 0;
1809  if (c->cur_timestamp != AV_NOPTS_VALUE) {
1810  /* catch up */
1811  pls->seek_timestamp = c->cur_timestamp;
1812  pls->seek_flags = AVSEEK_FLAG_ANY;
1813  pls->seek_stream_index = -1;
1814  }
1815  av_log(s, AV_LOG_INFO, "Now receiving playlist %d, segment %d\n", i, pls->cur_seq_no);
1816  } else if (first && !pls->cur_needed && pls->needed) {
1817  if (pls->input)
1818  ff_format_io_close(pls->parent, &pls->input);
1819  pls->needed = 0;
1820  changed = 1;
1821  av_log(s, AV_LOG_INFO, "No longer receiving playlist %d\n", i);
1822  }
1823  }
1824  return changed;
1825 }
1826 
1828 {
1829  if (pls->id3_offset >= 0) {
1830  pls->pkt.dts = pls->id3_mpegts_timestamp +
1831  av_rescale_q(pls->id3_offset,
1832  pls->ctx->streams[pls->pkt.stream_index]->time_base,
1834  if (pls->pkt.duration)
1835  pls->id3_offset += pls->pkt.duration;
1836  else
1837  pls->id3_offset = -1;
1838  } else {
1839  /* there have been packets with unknown duration
1840  * since the last id3 tag, should not normally happen */
1841  pls->pkt.dts = AV_NOPTS_VALUE;
1842  }
1843 
1844  if (pls->pkt.duration)
1845  pls->pkt.duration = av_rescale_q(pls->pkt.duration,
1846  pls->ctx->streams[pls->pkt.stream_index]->time_base,
1848 
1849  pls->pkt.pts = AV_NOPTS_VALUE;
1850 }
1851 
1852 static AVRational get_timebase(struct playlist *pls)
1853 {
1854  if (pls->is_id3_timestamped)
1855  return MPEG_TIME_BASE_Q;
1856 
1857  return pls->ctx->streams[pls->pkt.stream_index]->time_base;
1858 }
1859 
1860 static int compare_ts_with_wrapdetect(int64_t ts_a, struct playlist *pls_a,
1861  int64_t ts_b, struct playlist *pls_b)
1862 {
1863  int64_t scaled_ts_a = av_rescale_q(ts_a, get_timebase(pls_a), MPEG_TIME_BASE_Q);
1864  int64_t scaled_ts_b = av_rescale_q(ts_b, get_timebase(pls_b), MPEG_TIME_BASE_Q);
1865 
1866  return av_compare_mod(scaled_ts_a, scaled_ts_b, 1LL << 33);
1867 }
1868 
1870 {
1871  HLSContext *c = s->priv_data;
1872  int ret, i, minplaylist = -1;
1873 
1875  c->first_packet = 0;
1876 
1877  for (i = 0; i < c->n_playlists; i++) {
1878  struct playlist *pls = c->playlists[i];
1879  /* Make sure we've got one buffered packet from each open playlist
1880  * stream */
1881  if (pls->needed && !pls->pkt.data) {
1882  while (1) {
1883  int64_t ts_diff;
1884  AVRational tb;
1885  ret = av_read_frame(pls->ctx, &pls->pkt);
1886  if (ret < 0) {
1887  if (!avio_feof(&pls->pb) && ret != AVERROR_EOF)
1888  return ret;
1889  reset_packet(&pls->pkt);
1890  break;
1891  } else {
1892  /* stream_index check prevents matching picture attachments etc. */
1893  if (pls->is_id3_timestamped && pls->pkt.stream_index == 0) {
1894  /* audio elementary streams are id3 timestamped */
1896  }
1897 
1898  if (c->first_timestamp == AV_NOPTS_VALUE &&
1899  pls->pkt.dts != AV_NOPTS_VALUE)
1900  c->first_timestamp = av_rescale_q(pls->pkt.dts,
1902  }
1903 
1904  if (pls->seek_timestamp == AV_NOPTS_VALUE)
1905  break;
1906 
1907  if (pls->seek_stream_index < 0 ||
1908  pls->seek_stream_index == pls->pkt.stream_index) {
1909 
1910  if (pls->pkt.dts == AV_NOPTS_VALUE) {
1912  break;
1913  }
1914 
1915  tb = get_timebase(pls);
1916  ts_diff = av_rescale_rnd(pls->pkt.dts, AV_TIME_BASE,
1917  tb.den, AV_ROUND_DOWN) -
1918  pls->seek_timestamp;
1919  if (ts_diff >= 0 && (pls->seek_flags & AVSEEK_FLAG_ANY ||
1920  pls->pkt.flags & AV_PKT_FLAG_KEY)) {
1922  break;
1923  }
1924  }
1925  av_packet_unref(&pls->pkt);
1926  reset_packet(&pls->pkt);
1927  }
1928  }
1929  /* Check if this stream has the packet with the lowest dts */
1930  if (pls->pkt.data) {
1931  struct playlist *minpls = minplaylist < 0 ?
1932  NULL : c->playlists[minplaylist];
1933  if (minplaylist < 0) {
1934  minplaylist = i;
1935  } else {
1936  int64_t dts = pls->pkt.dts;
1937  int64_t mindts = minpls->pkt.dts;
1938 
1939  if (dts == AV_NOPTS_VALUE ||
1940  (mindts != AV_NOPTS_VALUE && compare_ts_with_wrapdetect(dts, pls, mindts, minpls) < 0))
1941  minplaylist = i;
1942  }
1943  }
1944  }
1945 
1946  /* If we got a packet, return it */
1947  if (minplaylist >= 0) {
1948  struct playlist *pls = c->playlists[minplaylist];
1949 
1950  ret = update_streams_from_subdemuxer(s, pls);
1951  if (ret < 0) {
1952  av_packet_unref(&pls->pkt);
1953  reset_packet(&pls->pkt);
1954  return ret;
1955  }
1956 
1957  /* check if noheader flag has been cleared by the subdemuxer */
1958  if (pls->has_noheader_flag && !(pls->ctx->ctx_flags & AVFMTCTX_NOHEADER)) {
1959  pls->has_noheader_flag = 0;
1961  }
1962 
1963  if (pls->pkt.stream_index >= pls->n_main_streams) {
1964  av_log(s, AV_LOG_ERROR, "stream index inconsistency: index %d, %d main streams, %d subdemuxer streams\n",
1965  pls->pkt.stream_index, pls->n_main_streams, pls->ctx->nb_streams);
1966  av_packet_unref(&pls->pkt);
1967  reset_packet(&pls->pkt);
1968  return AVERROR_BUG;
1969  }
1970 
1971  *pkt = pls->pkt;
1972  pkt->stream_index = pls->main_streams[pls->pkt.stream_index]->index;
1973  reset_packet(&c->playlists[minplaylist]->pkt);
1974 
1975  if (pkt->dts != AV_NOPTS_VALUE)
1976  c->cur_timestamp = av_rescale_q(pkt->dts,
1977  pls->ctx->streams[pls->pkt.stream_index]->time_base,
1978  AV_TIME_BASE_Q);
1979 
1980  return 0;
1981  }
1982  return AVERROR_EOF;
1983 }
1984 
1986 {
1987  HLSContext *c = s->priv_data;
1988 
1989  free_playlist_list(c);
1990  free_variant_list(c);
1992 
1993  av_dict_free(&c->avio_opts);
1994 
1995  return 0;
1996 }
1997 
1998 static int hls_read_seek(AVFormatContext *s, int stream_index,
1999  int64_t timestamp, int flags)
2000 {
2001  HLSContext *c = s->priv_data;
2002  struct playlist *seek_pls = NULL;
2003  int i, seq_no;
2004  int j;
2005  int stream_subdemuxer_index;
2006  int64_t first_timestamp, seek_timestamp, duration;
2007 
2008  if ((flags & AVSEEK_FLAG_BYTE) ||
2009  !(c->variants[0]->playlists[0]->finished || c->variants[0]->playlists[0]->type == PLS_TYPE_EVENT))
2010  return AVERROR(ENOSYS);
2011 
2012  first_timestamp = c->first_timestamp == AV_NOPTS_VALUE ?
2013  0 : c->first_timestamp;
2014 
2015  seek_timestamp = av_rescale_rnd(timestamp, AV_TIME_BASE,
2016  s->streams[stream_index]->time_base.den,
2017  flags & AVSEEK_FLAG_BACKWARD ?
2019 
2020  duration = s->duration == AV_NOPTS_VALUE ?
2021  0 : s->duration;
2022 
2023  if (0 < duration && duration < seek_timestamp - first_timestamp)
2024  return AVERROR(EIO);
2025 
2026  /* find the playlist with the specified stream */
2027  for (i = 0; i < c->n_playlists; i++) {
2028  struct playlist *pls = c->playlists[i];
2029  for (j = 0; j < pls->n_main_streams; j++) {
2030  if (pls->main_streams[j] == s->streams[stream_index]) {
2031  seek_pls = pls;
2032  stream_subdemuxer_index = j;
2033  break;
2034  }
2035  }
2036  }
2037  /* check if the timestamp is valid for the playlist with the
2038  * specified stream index */
2039  if (!seek_pls || !find_timestamp_in_playlist(c, seek_pls, seek_timestamp, &seq_no))
2040  return AVERROR(EIO);
2041 
2042  /* set segment now so we do not need to search again below */
2043  seek_pls->cur_seq_no = seq_no;
2044  seek_pls->seek_stream_index = stream_subdemuxer_index;
2045 
2046  for (i = 0; i < c->n_playlists; i++) {
2047  /* Reset reading */
2048  struct playlist *pls = c->playlists[i];
2049  if (pls->input)
2050  ff_format_io_close(pls->parent, &pls->input);
2051  av_packet_unref(&pls->pkt);
2052  reset_packet(&pls->pkt);
2053  pls->pb.eof_reached = 0;
2054  /* Clear any buffered data */
2055  pls->pb.buf_end = pls->pb.buf_ptr = pls->pb.buffer;
2056  /* Reset the pos, to let the mpegts demuxer know we've seeked. */
2057  pls->pb.pos = 0;
2058  /* Flush the packet queue of the subdemuxer. */
2059  ff_read_frame_flush(pls->ctx);
2060 
2062  pls->seek_flags = flags;
2063 
2064  if (pls != seek_pls) {
2065  /* set closest segment seq_no for playlists not handled above */
2066  find_timestamp_in_playlist(c, pls, seek_timestamp, &pls->cur_seq_no);
2067  /* seek the playlist to the given position without taking
2068  * keyframes into account since this playlist does not have the
2069  * specified stream where we should look for the keyframes */
2070  pls->seek_stream_index = -1;
2071  pls->seek_flags |= AVSEEK_FLAG_ANY;
2072  }
2073  }
2074 
2076 
2077  return 0;
2078 }
2079 
2080 static int hls_probe(AVProbeData *p)
2081 {
2082  /* Require #EXTM3U at the start, and either one of the ones below
2083  * somewhere for a proper match. */
2084  if (strncmp(p->buf, "#EXTM3U", 7))
2085  return 0;
2086 
2087  if (strstr(p->buf, "#EXT-X-STREAM-INF:") ||
2088  strstr(p->buf, "#EXT-X-TARGETDURATION:") ||
2089  strstr(p->buf, "#EXT-X-MEDIA-SEQUENCE:"))
2090  return AVPROBE_SCORE_MAX;
2091  return 0;
2092 }
2093 
2094 #define OFFSET(x) offsetof(HLSContext, x)
2095 #define FLAGS AV_OPT_FLAG_DECODING_PARAM
2096 static const AVOption hls_options[] = {
2097  {"live_start_index", "segment index to start live streams at (negative values are from the end)",
2098  OFFSET(live_start_index), AV_OPT_TYPE_INT, {.i64 = -3}, INT_MIN, INT_MAX, FLAGS},
2099  {NULL}
2100 };
2101 
2102 static const AVClass hls_class = {
2103  .class_name = "hls,applehttp",
2104  .item_name = av_default_item_name,
2105  .option = hls_options,
2106  .version = LIBAVUTIL_VERSION_INT,
2107 };
2108 
2110  .name = "hls,applehttp",
2111  .long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
2112  .priv_class = &hls_class,
2113  .priv_data_size = sizeof(HLSContext),
2114  .read_probe = hls_probe,
2117  .read_close = hls_close,
2119 };
#define FF_COMPLIANCE_EXPERIMENTAL
Allow nonstandardized experimental things.
Definition: avcodec.h:2882
#define AVSEEK_FLAG_BACKWARD
Definition: avformat.h:2373
uint8_t key[16]
Definition: hls.c:127
#define NULL
Definition: coverity.c:32
static int update_init_section(struct playlist *pls, struct segment *seg)
Definition: hls.c:1176
int needed
Definition: hls.c:114
struct segment * init_section
Definition: hls.c:76
void ff_make_absolute_url(char *buf, int size, const char *base, const char *rel)
Convert a relative url into an absolute url, given a base url.
Definition: url.c:80
const char * s
Definition: avisynth_c.h:768
void * data
Definition: id3v2.h:57
Bytestream IO Context.
Definition: avio.h:147
#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:309
int bandwidth
Definition: hls.c:174
Definition: hls.c:92
char * headers
holds HTTP headers set as an AVOption to the HTTP protocol context
Definition: hls.c:203
char assoc_language[MAX_FIELD_LEN]
Definition: hls.c:451
int strict_std_compliance
Definition: hls.c:206
ReadFromURLMode
Definition: hls.c:855
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1579
AVDictionary * id3_initial
Definition: hls.c:136
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:284
struct segment ** init_sections
Definition: hls.c:155
static void handle_init_section_args(struct init_section_info *info, const char *key, int key_len, char **dest, int *dest_len)
Definition: hls.c:434
static int read_from_url(struct playlist *pls, struct segment *seg, uint8_t *buf, int buf_size, enum ReadFromURLMode mode)
Definition: hls.c:860
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
unsigned int id3_buf_size
Definition: hls.c:135
ID3v2ExtraMeta * id3_deferred_extra
Definition: hls.c:139
#define LIBAVUTIL_VERSION_INT
Definition: version.h:70
unsigned char * buf_ptr
Current position in the buffer.
Definition: avio.h:210
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:211
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:4507
int ff_copy_whiteblacklists(AVFormatContext *dst, const AVFormatContext *src)
Copies the whilelists from one context to the other.
Definition: utils.c:145
#define AVSEEK_FLAG_ANY
seek to any frame, even non-keyframes
Definition: avformat.h:2375
char forced[4]
Definition: hls.c:454
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:458
static int64_t default_reload_interval(struct playlist *pls)
Definition: hls.c:1233
int disposition
Definition: hls.c:170
unsigned int init_sec_data_len
Definition: hls.c:123
int num
Numerator.
Definition: rational.h:59
int index
stream index in AVFormatContext
Definition: avformat.h:879
int size
Definition: avcodec.h:1591
#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:230
#define AVIO_FLAG_READ
read-only
Definition: avio.h:606
char language[MAX_FIELD_LEN]
Definition: hls.c:450
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:1080
unsigned char * buffer
Start of the buffer.
Definition: avio.h:208
int has_noheader_flag
Definition: hls.c:101
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:217
#define AV_DISPOSITION_HEARING_IMPAIRED
stream for hearing impaired audiences
Definition: avformat.h:844
static void fill_buf(uint8_t *data, int w, int h, int linesize, uint8_t v)
char * key
Definition: hls.c:72
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:252
int av_usleep(unsigned usec)
Sleep for a period of time.
Definition: time.c:76
discard all
Definition: avcodec.h:786
char * user_agent
holds HTTP user agent set as an AVOption to the HTTP protocol context
Definition: hls.c:201
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:536
#define MAX_CHARACTERISTICS_LEN
Definition: hls.c:44
int ctx_flags
Flags signalling stream properties.
Definition: avformat.h:1376
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:1123
static void reset_packet(AVPacket *pkt)
Definition: hls.c:296
int strict_std_compliance
Allow non-standard and experimental extension.
Definition: avformat.h:1609
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:910
Format I/O context.
Definition: avformat.h:1327
#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:373
void ff_read_frame_flush(AVFormatContext *s)
Flush the frame reader.
Definition: utils.c:1795
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
unsigned int init_sec_buf_read_offset
Definition: hls.c:124
Public dictionary API.
char type[16]
Definition: hls.c:447
int n_renditions
Definition: hls.c:192
#define ID3v2_HEADER_SIZE
Definition: id3v2.h:30
#define MPEG_TIME_BASE_Q
Definition: hls.c:47
enum AVMediaType type
Definition: hls.c:165
uint8_t iv[16]
Definition: hls.c:74
char defaultr[4]
Definition: hls.c:453
uint8_t
Round toward +infinity.
Definition: mathematics.h:83
int n_variants
Definition: hls.c:188
#define FLAGS
Definition: hls.c:2095
#define av_malloc(s)
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1280
mode
Definition: f_perms.c:27
AVOptions.
char group_id[MAX_FIELD_LEN]
Definition: hls.c:449
int64_t cur_seg_offset
Definition: hls.c:116
char audio[MAX_FIELD_LEN]
Definition: hls.c:322
static void free_rendition_list(HLSContext *c)
Definition: hls.c:283
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1608
int id
Format-specific stream ID.
Definition: avformat.h:885
uint8_t * read_buffer
Definition: hls.c:95
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5202
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:980
static struct playlist * new_playlist(HLSContext *c, const char *url, const char *base)
Definition: hls.c:302
AVInputFormat ff_hls_demuxer
Definition: hls.c:2109
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4140
int finished
Definition: hls.c:108
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1395
int64_t duration
Definition: movenc.c:63
static void handle_id3(AVIOContext *pb, struct playlist *pls)
Definition: hls.c:939
int n_playlists
Definition: hls.c:190
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:40
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1438
uint8_t * data
Definition: avcodec.h:1590
AVProgram * av_new_program(AVFormatContext *s, int id)
Definition: utils.c:4236
static int read_data(void *opaque, uint8_t *buf, int buf_size)
Definition: hls.c:1240
#define AVERROR_EOF
End of file.
Definition: error.h:55
unsigned int init_sec_buf_size
Definition: hls.c:122
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
ptrdiff_t size
Definition: opengl_enc.c:101
struct rendition ** renditions
Definition: hls.c:150
static void add_metadata_from_renditions(AVFormatContext *s, struct playlist *pls, enum AVMediaType type)
Definition: hls.c:1376
#define av_log(a,...)
static void free_playlist_list(HLSContext *c)
Definition: hls.c:240
struct rendition ** renditions
Definition: hls.c:193
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:604
char * http_proxy
holds the address of the HTTP proxy server
Definition: hls.c:204
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1622
struct variant ** variants
Definition: hls.c:189
static AVRational get_timebase(struct playlist *pls)
Definition: hls.c:1852
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:364
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
Definition: utils.c:4065
AVStream ** main_streams
Definition: hls.c:105
static int compare_ts_with_wrapdetect(int64_t ts_a, struct playlist *pls_a, int64_t ts_b, struct playlist *pls_b)
Definition: hls.c:1860
#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:1541
char video_group[MAX_FIELD_LEN]
Definition: hls.c:181
int64_t cur_timestamp
Definition: hls.c:199
int n_renditions
Definition: hls.c:149
static const AVClass hls_class
Definition: hls.c:2102
AVIOInterruptCB * interrupt_callback
Definition: hls.c:200
char bandwidth[20]
Definition: hls.c:320
static void handle_key_args(struct key_info *info, const char *key, int key_len, char **dest, int *dest_len)
Definition: hls.c:377
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:394
int64_t id3_mpegts_timestamp
Definition: hls.c:132
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:203
static void free_segment_list(struct playlist *pls)
Definition: hls.c:217
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3949
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1107
Definition: graph2dot.c:48
simple assert() macros that are a bit more flexible than ISO C assert().
static int update_streams_from_subdemuxer(AVFormatContext *s, struct playlist *pls)
Definition: hls.c:1532
int first_packet
Definition: hls.c:197
static int find_timestamp_in_playlist(HLSContext *c, struct playlist *pls, int64_t timestamp, int *seq_no)
Definition: hls.c:1408
uint8_t * data
Definition: id3v2.h:78
int64_t id3_offset
Definition: hls.c:133
int is_id3_timestamped
Definition: hls.c:131
New fields can be added to the end with minor version bumps.
Definition: avformat.h:1254
#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:82
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1596
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
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:463
int live_start_index
Definition: hls.c:196
Definition: hls.c:67
#define AV_DISPOSITION_FORCED
Track should be used during playback by default.
Definition: avformat.h:843
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1383
AVDictionary * opts
Definition: movenc.c:50
char group_id[MAX_FIELD_LEN]
Definition: hls.c:167
static struct segment * current_segment(struct playlist *pls)
Definition: hls.c:850
int n_main_streams
Definition: hls.c:106
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:243
#define dynarray_add(tab, nb_ptr, elem)
Definition: internal.h:168
char filename[1024]
input or output filename
Definition: avformat.h:1403
static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **opts)
Definition: hls.c:1495
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:248
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:1352
uint8_t * init_sec_buf
Definition: hls.c:121
static int hls_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: hls.c:1869
uint8_t * id3_buf
Definition: hls.c:134
Definition: hls.c:371
static struct segment * new_init_section(struct playlist *pls, struct init_section_info *info, const char *url_base)
Definition: hls.c:397
void * av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)
Reallocate the given buffer if it is not large enough, otherwise do nothing.
Definition: mem.c:480
AVDictionary * metadata
Definition: avformat.h:947
static struct variant * new_variant(HLSContext *c, struct variant_info *info, const char *url, const char *base)
Definition: hls.c:327
#define AVFMT_FLAG_CUSTOM_IO
The caller has supplied a custom AVIOContext, don't avio_close() it.
Definition: avformat.h:1446
int ff_get_line(AVIOContext *s, char *buf, int maxlen)
Read a whole line of text from AVIOContext.
Definition: aviobuf.c:765
Usually treated as AVMEDIA_TYPE_DATA.
Definition: avutil.h:194
static void fill_timing_for_id3_timestamped_stream(struct playlist *pls)
Definition: hls.c:1827
struct segment ** segments
Definition: hls.c:113
#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:202
int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding rnd)
Rescale a 64-bit integer with specified rounding.
Definition: mathematics.c:58
AVPacket pkt
Definition: hls.c:100
uint8_t * owner
Definition: id3v2.h:77
char subtitles_group[MAX_FIELD_LEN]
Definition: hls.c:182
char name[MAX_FIELD_LEN]
Definition: hls.c:452
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:514
#define AV_DISPOSITION_VISUAL_IMPAIRED
stream for visual impaired audiences
Definition: avformat.h:845
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:590
Stream structure.
Definition: avformat.h:878
int id3_changed
Definition: hls.c:138
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
int avformat_queue_attached_pictures(AVFormatContext *s)
Definition: utils.c:423
AVFormatContext * parent
Definition: hls.c:97
AVFormatContext * ctx
Definition: hls.c:187
static int read_chomp_line(AVIOContext *s, char *buf, int maxlen)
Definition: hls.c:209
static void parse_id3(AVFormatContext *s, AVIOContext *pb, AVDictionary **metadata, int64_t *dts, ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta **extra_meta)
Definition: hls.c:884
#define AV_DISPOSITION_DEFAULT
Definition: avformat.h:831
int64_t first_timestamp
Definition: hls.c:198
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:267
char subtitles[MAX_FIELD_LEN]
Definition: hls.c:324
struct ID3v2ExtraMeta * next
Definition: id3v2.h:58
int ff_check_interrupt(AVIOInterruptCB *cb)
Check if the user has requested to interrupt a blocking function associated with cb.
Definition: avio.c:655
enum PlaylistType type
Definition: hls.c:109
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:254
AVIOContext * pb
I/O context.
Definition: avformat.h:1369
static int parse_playlist(HLSContext *c, const char *url, struct playlist *pls, AVIOContext *in)
Definition: hls.c:646
char url[MAX_URL_SIZE]
Definition: hlsproto.c:55
int n_init_sections
Definition: hls.c:154
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:563
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:2096
static int hls_read_header(AVFormatContext *s)
Definition: hls.c:1580
void * buf
Definition: avisynth_c.h:690
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:70
struct playlist ** playlists
Definition: hls.c:191
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:50
int64_t last_load_time
Definition: hls.c:117
Describe the class of an AVClass context structure.
Definition: log.h:67
static void update_noheader_flag(AVFormatContext *s)
Definition: hls.c:1559
#define AV_WB32(p, v)
Definition: intreadwrite.h:419
AVIOContext * input
Definition: hls.c:96
Rational number (pair of numerator and denominator).
Definition: rational.h:58
int cur_needed
Definition: hls.c:114
struct segment * cur_init_section
Definition: hls.c:120
int seek_stream_index
Definition: hls.c:143
PlaylistType
Definition: hls.c:81
int64_t target_duration
Definition: hls.c:110
static int save_avio_options(AVFormatContext *s)
Definition: hls.c:1473
#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:2374
static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url, AVDictionary *opts, AVDictionary *opts2, int *is_http)
Definition: hls.c:598
char uri[MAX_URL_SIZE]
Definition: hls.c:448
AVMediaType
Definition: avutil.h:193
int n_playlists
Definition: hls.c:177
struct playlist * playlist
Definition: hls.c:166
static void add_stream_to_programs(AVFormatContext *s, struct playlist *pls, AVStream *stream)
Definition: hls.c:1505
#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:4076
#define u(width,...)
This structure contains the data a format has to probe a file.
Definition: avformat.h:461
int ff_hex_to_data(uint8_t *data, const char *p)
Parse a string of hexadecimal strings.
Definition: utils.c:4479
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1647
Definition: hls.c:164
Round toward -infinity.
Definition: mathematics.h:82
static void handle_variant_args(struct variant_info *info, const char *key, int key_len, char **dest, int *dest_len)
Definition: hls.c:353
const char * avio_find_protocol_name(const char *url)
Return the name of the protocol that will handle the passed URL.
Definition: avio.c:473
int size
Size of data in bytes.
Definition: buffer.h:93
AVDictionary * metadata
Definition: avformat.h:1260
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
char audio_group[MAX_FIELD_LEN]
Definition: hls.c:180
int64_t av_gettime_relative(void)
Get the current time in microseconds since some unspecified starting point.
Definition: time.c:56
KeyType
Definition: hls.c:61
static int flags
Definition: cpu.c:47
static int recheck_discard_flags(AVFormatContext *s, int first)
Definition: hls.c:1787
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:4537
int64_t seek_timestamp
Definition: hls.c:141
char iv[35]
Definition: hls.c:374
#define OFFSET(x)
Definition: hls.c:2094
char characteristics[MAX_CHARACTERISTICS_LEN]
Definition: hls.c:455
int seek_flags
Definition: hls.c:142
char * av_strtok(char *s, const char *delim, char **saveptr)
Split the string into several tokens which can be accessed by successive calls to av_strtok()...
Definition: avstring.c:184
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:473
int av_strstart(const char *str, const char *pfx, const char **ptr)
Return non-zero if pfx is a prefix of str.
Definition: avstring.c:34
char language[MAX_FIELD_LEN]
Definition: hls.c:168
AVIOContext pb
Definition: hls.c:94
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:372
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:3286
const char * tag
Definition: id3v2.h:56
static double c[64]
int cur_seq_no
Definition: hls.c:195
int av_dict_set_int(AVDictionary **pm, const char *key, int64_t value, int flags)
Convenience wrapper for av_dict_set that converts the value to a string and stores it...
Definition: dict.c:147
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:936
int64_t pos
position in the file of the current buffer
Definition: avio.h:220
int pts_wrap_bits
number of bits in pts (used for wrapping control)
Definition: avformat.h:1039
AVDictionary * avio_opts
Definition: hls.c:205
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:33
char * key
Definition: dict.h:86
int n_segments
Definition: hls.c:112
int den
Denominator.
Definition: rational.h:60
void avformat_close_input(AVFormatContext **s)
Close an opened input AVFormatContext.
Definition: utils.c:4112
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:733
static int hls_probe(AVProbeData *p)
Definition: hls.c:2080
static int ensure_playlist(HLSContext *c, struct playlist **pls, const char *url)
Definition: hls.c:580
static int hls_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: hls.c:1998
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:732
#define av_free(p)
int id3_found
Definition: hls.c:137
char name[MAX_FIELD_LEN]
Definition: hls.c:169
void ff_id3v2_read_dict(AVIOContext *pb, AVDictionary **metadata, const char *magic, ID3v2ExtraMeta **extra_meta)
Read an ID3v2 tag into specified dictionary and retrieve supported extra metadata.
Definition: id3v2.c:1095
char * value
Definition: dict.h:87
int eof_reached
true if eof reached
Definition: avio.h:222
int len
static uint8_t tmp[8]
Definition: des.c:38
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:1355
AVBufferRef * buf
Definition: id3v2.h:70
AVFormatContext * ctx
Definition: hls.c:99
uint32_t datasize
Definition: id3v2.h:79
int avformat_open_input(AVFormatContext **ps, const char *url, AVInputFormat *fmt, AVDictionary **options)
Open an input stream and read the header.
Definition: utils.c:474
struct playlist ** playlists
Definition: hls.c:178
Definition: hls.c:173
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1589
char video[MAX_FIELD_LEN]
Definition: hls.c:323
int64_t duration
Duration of the stream, in AV_TIME_BASE fractional seconds.
Definition: avformat.h:1422
#define av_freep(p)
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:662
#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:393
AVCodecParameters * codecpar
Definition: avformat.h:1230
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:328
int start_seq_no
Definition: hls.c:111
int stream_index
Definition: avcodec.h:1592
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:915
static void free_init_section_list(struct playlist *pls)
Definition: hls.c:229
int64_t duration
Definition: hls.c:68
static void free_variant_list(HLSContext *c)
Definition: hls.c:271
int cur_seq_no
Definition: hls.c:115
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:938
char key_url[MAX_URL_SIZE]
Definition: hls.c:126
int(* io_open)(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **options)
Definition: avformat.h:1885
static int hls_close(AVFormatContext *s)
Definition: hls.c:1985
char * ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase)
Definition: utils.c:4458
This structure stores compressed data.
Definition: avcodec.h:1567
Definition: hls.c:62
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1583
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:965
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:242
#define tb
Definition: regdef.h:68
static av_cold void cleanup(FlashSV2Context *s)
Definition: flashsv2enc.c:127
int64_t av_compare_mod(uint64_t a, uint64_t b, uint64_t mod)
Compare the remainders of two integer operands divided by a common divisor.
Definition: mathematics.c:160
const char * name
Definition: opengl_enc.c:103
static int select_cur_seq_no(HLSContext *c, struct playlist *pls)
Definition: hls.c:1434