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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
209 } HLSContext;
210 
211 static int read_chomp_line(AVIOContext *s, char *buf, int maxlen)
212 {
213  int len = ff_get_line(s, buf, maxlen);
214  while (len > 0 && av_isspace(buf[len - 1]))
215  buf[--len] = '\0';
216  return len;
217 }
218 
219 static void free_segment_list(struct playlist *pls)
220 {
221  int i;
222  for (i = 0; i < pls->n_segments; i++) {
223  av_freep(&pls->segments[i]->key);
224  av_freep(&pls->segments[i]->url);
225  av_freep(&pls->segments[i]);
226  }
227  av_freep(&pls->segments);
228  pls->n_segments = 0;
229 }
230 
231 static void free_init_section_list(struct playlist *pls)
232 {
233  int i;
234  for (i = 0; i < pls->n_init_sections; i++) {
235  av_freep(&pls->init_sections[i]->url);
236  av_freep(&pls->init_sections[i]);
237  }
238  av_freep(&pls->init_sections);
239  pls->n_init_sections = 0;
240 }
241 
243 {
244  int i;
245  for (i = 0; i < c->n_playlists; i++) {
246  struct playlist *pls = c->playlists[i];
247  free_segment_list(pls);
249  av_freep(&pls->main_streams);
250  av_freep(&pls->renditions);
251  av_freep(&pls->id3_buf);
252  av_dict_free(&pls->id3_initial);
254  av_freep(&pls->init_sec_buf);
255  av_packet_unref(&pls->pkt);
256  av_freep(&pls->pb.buffer);
257  if (pls->input)
258  ff_format_io_close(c->ctx, &pls->input);
259  if (pls->ctx) {
260  pls->ctx->pb = NULL;
261  avformat_close_input(&pls->ctx);
262  }
263  av_free(pls);
264  }
265  av_freep(&c->playlists);
266  av_freep(&c->cookies);
267  av_freep(&c->user_agent);
268  av_freep(&c->headers);
269  av_freep(&c->http_proxy);
270  c->n_playlists = 0;
271 }
272 
274 {
275  int i;
276  for (i = 0; i < c->n_variants; i++) {
277  struct variant *var = c->variants[i];
278  av_freep(&var->playlists);
279  av_free(var);
280  }
281  av_freep(&c->variants);
282  c->n_variants = 0;
283 }
284 
286 {
287  int i;
288  for (i = 0; i < c->n_renditions; i++)
289  av_freep(&c->renditions[i]);
290  av_freep(&c->renditions);
291  c->n_renditions = 0;
292 }
293 
294 /*
295  * Used to reset a statically allocated AVPacket to a clean slate,
296  * containing no data.
297  */
298 static void reset_packet(AVPacket *pkt)
299 {
300  av_init_packet(pkt);
301  pkt->data = NULL;
302 }
303 
304 static struct playlist *new_playlist(HLSContext *c, const char *url,
305  const char *base)
306 {
307  struct playlist *pls = av_mallocz(sizeof(struct playlist));
308  if (!pls)
309  return NULL;
310  reset_packet(&pls->pkt);
311  ff_make_absolute_url(pls->url, sizeof(pls->url), base, url);
313 
314  pls->is_id3_timestamped = -1;
316 
317  dynarray_add(&c->playlists, &c->n_playlists, pls);
318  return pls;
319 }
320 
321 struct variant_info {
322  char bandwidth[20];
323  /* variant group ids: */
327 };
328 
329 static struct variant *new_variant(HLSContext *c, struct variant_info *info,
330  const char *url, const char *base)
331 {
332  struct variant *var;
333  struct playlist *pls;
334 
335  pls = new_playlist(c, url, base);
336  if (!pls)
337  return NULL;
338 
339  var = av_mallocz(sizeof(struct variant));
340  if (!var)
341  return NULL;
342 
343  if (info) {
344  var->bandwidth = atoi(info->bandwidth);
345  strcpy(var->audio_group, info->audio);
346  strcpy(var->video_group, info->video);
347  strcpy(var->subtitles_group, info->subtitles);
348  }
349 
350  dynarray_add(&c->variants, &c->n_variants, var);
351  dynarray_add(&var->playlists, &var->n_playlists, pls);
352  return var;
353 }
354 
355 static void handle_variant_args(struct variant_info *info, const char *key,
356  int key_len, char **dest, int *dest_len)
357 {
358  if (!strncmp(key, "BANDWIDTH=", key_len)) {
359  *dest = info->bandwidth;
360  *dest_len = sizeof(info->bandwidth);
361  } else if (!strncmp(key, "AUDIO=", key_len)) {
362  *dest = info->audio;
363  *dest_len = sizeof(info->audio);
364  } else if (!strncmp(key, "VIDEO=", key_len)) {
365  *dest = info->video;
366  *dest_len = sizeof(info->video);
367  } else if (!strncmp(key, "SUBTITLES=", key_len)) {
368  *dest = info->subtitles;
369  *dest_len = sizeof(info->subtitles);
370  }
371 }
372 
373 struct key_info {
375  char method[11];
376  char iv[35];
377 };
378 
379 static void handle_key_args(struct key_info *info, const char *key,
380  int key_len, char **dest, int *dest_len)
381 {
382  if (!strncmp(key, "METHOD=", key_len)) {
383  *dest = info->method;
384  *dest_len = sizeof(info->method);
385  } else if (!strncmp(key, "URI=", key_len)) {
386  *dest = info->uri;
387  *dest_len = sizeof(info->uri);
388  } else if (!strncmp(key, "IV=", key_len)) {
389  *dest = info->iv;
390  *dest_len = sizeof(info->iv);
391  }
392 }
393 
396  char byterange[32];
397 };
398 
399 static struct segment *new_init_section(struct playlist *pls,
400  struct init_section_info *info,
401  const char *url_base)
402 {
403  struct segment *sec;
404  char *ptr;
405  char tmp_str[MAX_URL_SIZE];
406 
407  if (!info->uri[0])
408  return NULL;
409 
410  sec = av_mallocz(sizeof(*sec));
411  if (!sec)
412  return NULL;
413 
414  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url_base, info->uri);
415  sec->url = av_strdup(tmp_str);
416  if (!sec->url) {
417  av_free(sec);
418  return NULL;
419  }
420 
421  if (info->byterange[0]) {
422  sec->size = strtoll(info->byterange, NULL, 10);
423  ptr = strchr(info->byterange, '@');
424  if (ptr)
425  sec->url_offset = strtoll(ptr+1, NULL, 10);
426  } else {
427  /* the entire file is the init section */
428  sec->size = -1;
429  }
430 
431  dynarray_add(&pls->init_sections, &pls->n_init_sections, sec);
432 
433  return sec;
434 }
435 
436 static void handle_init_section_args(struct init_section_info *info, const char *key,
437  int key_len, char **dest, int *dest_len)
438 {
439  if (!strncmp(key, "URI=", key_len)) {
440  *dest = info->uri;
441  *dest_len = sizeof(info->uri);
442  } else if (!strncmp(key, "BYTERANGE=", key_len)) {
443  *dest = info->byterange;
444  *dest_len = sizeof(info->byterange);
445  }
446 }
447 
449  char type[16];
455  char defaultr[4];
456  char forced[4];
458 };
459 
460 static struct rendition *new_rendition(HLSContext *c, struct rendition_info *info,
461  const char *url_base)
462 {
463  struct rendition *rend;
465  char *characteristic;
466  char *chr_ptr;
467  char *saveptr;
468 
469  if (!strcmp(info->type, "AUDIO"))
470  type = AVMEDIA_TYPE_AUDIO;
471  else if (!strcmp(info->type, "VIDEO"))
472  type = AVMEDIA_TYPE_VIDEO;
473  else if (!strcmp(info->type, "SUBTITLES"))
474  type = AVMEDIA_TYPE_SUBTITLE;
475  else if (!strcmp(info->type, "CLOSED-CAPTIONS"))
476  /* CLOSED-CAPTIONS is ignored since we do not support CEA-608 CC in
477  * AVC SEI RBSP anyway */
478  return NULL;
479 
480  if (type == AVMEDIA_TYPE_UNKNOWN)
481  return NULL;
482 
483  /* URI is mandatory for subtitles as per spec */
484  if (type == AVMEDIA_TYPE_SUBTITLE && !info->uri[0])
485  return NULL;
486 
487  /* TODO: handle subtitles (each segment has to parsed separately) */
489  if (type == AVMEDIA_TYPE_SUBTITLE)
490  return NULL;
491 
492  rend = av_mallocz(sizeof(struct rendition));
493  if (!rend)
494  return NULL;
495 
496  dynarray_add(&c->renditions, &c->n_renditions, rend);
497 
498  rend->type = type;
499  strcpy(rend->group_id, info->group_id);
500  strcpy(rend->language, info->language);
501  strcpy(rend->name, info->name);
502 
503  /* add the playlist if this is an external rendition */
504  if (info->uri[0]) {
505  rend->playlist = new_playlist(c, info->uri, url_base);
506  if (rend->playlist)
508  &rend->playlist->n_renditions, rend);
509  }
510 
511  if (info->assoc_language[0]) {
512  int langlen = strlen(rend->language);
513  if (langlen < sizeof(rend->language) - 3) {
514  rend->language[langlen] = ',';
515  strncpy(rend->language + langlen + 1, info->assoc_language,
516  sizeof(rend->language) - langlen - 2);
517  }
518  }
519 
520  if (!strcmp(info->defaultr, "YES"))
522  if (!strcmp(info->forced, "YES"))
524 
525  chr_ptr = info->characteristics;
526  while ((characteristic = av_strtok(chr_ptr, ",", &saveptr))) {
527  if (!strcmp(characteristic, "public.accessibility.describes-music-and-sound"))
529  else if (!strcmp(characteristic, "public.accessibility.describes-video"))
531 
532  chr_ptr = NULL;
533  }
534 
535  return rend;
536 }
537 
538 static void handle_rendition_args(struct rendition_info *info, const char *key,
539  int key_len, char **dest, int *dest_len)
540 {
541  if (!strncmp(key, "TYPE=", key_len)) {
542  *dest = info->type;
543  *dest_len = sizeof(info->type);
544  } else if (!strncmp(key, "URI=", key_len)) {
545  *dest = info->uri;
546  *dest_len = sizeof(info->uri);
547  } else if (!strncmp(key, "GROUP-ID=", key_len)) {
548  *dest = info->group_id;
549  *dest_len = sizeof(info->group_id);
550  } else if (!strncmp(key, "LANGUAGE=", key_len)) {
551  *dest = info->language;
552  *dest_len = sizeof(info->language);
553  } else if (!strncmp(key, "ASSOC-LANGUAGE=", key_len)) {
554  *dest = info->assoc_language;
555  *dest_len = sizeof(info->assoc_language);
556  } else if (!strncmp(key, "NAME=", key_len)) {
557  *dest = info->name;
558  *dest_len = sizeof(info->name);
559  } else if (!strncmp(key, "DEFAULT=", key_len)) {
560  *dest = info->defaultr;
561  *dest_len = sizeof(info->defaultr);
562  } else if (!strncmp(key, "FORCED=", key_len)) {
563  *dest = info->forced;
564  *dest_len = sizeof(info->forced);
565  } else if (!strncmp(key, "CHARACTERISTICS=", key_len)) {
566  *dest = info->characteristics;
567  *dest_len = sizeof(info->characteristics);
568  }
569  /*
570  * ignored:
571  * - AUTOSELECT: client may autoselect based on e.g. system language
572  * - INSTREAM-ID: EIA-608 closed caption number ("CC1".."CC4")
573  */
574 }
575 
576 /* used by parse_playlist to allocate a new variant+playlist when the
577  * playlist is detected to be a Media Playlist (not Master Playlist)
578  * and we have no parent Master Playlist (parsing of which would have
579  * allocated the variant and playlist already)
580  * *pls == NULL => Master Playlist or parentless Media Playlist
581  * *pls != NULL => parented Media Playlist, playlist+variant allocated */
582 static int ensure_playlist(HLSContext *c, struct playlist **pls, const char *url)
583 {
584  if (*pls)
585  return 0;
586  if (!new_variant(c, NULL, url, NULL))
587  return AVERROR(ENOMEM);
588  *pls = c->playlists[c->n_playlists - 1];
589  return 0;
590 }
591 
592 static void update_options(char **dest, const char *name, void *src)
593 {
594  av_freep(dest);
595  av_opt_get(src, name, AV_OPT_SEARCH_CHILDREN, (uint8_t**)dest);
596  if (*dest && !strlen(*dest))
597  av_freep(dest);
598 }
599 
600 static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url,
601  AVDictionary *opts, AVDictionary *opts2, int *is_http)
602 {
603  HLSContext *c = s->priv_data;
604  AVDictionary *tmp = NULL;
605  const char *proto_name = NULL;
606  int ret;
607 
608  av_dict_copy(&tmp, opts, 0);
609  av_dict_copy(&tmp, opts2, 0);
610 
611  if (av_strstart(url, "crypto", NULL)) {
612  if (url[6] == '+' || url[6] == ':')
613  proto_name = avio_find_protocol_name(url + 7);
614  }
615 
616  if (!proto_name)
617  proto_name = avio_find_protocol_name(url);
618 
619  if (!proto_name)
620  return AVERROR_INVALIDDATA;
621 
622  // only http(s) & file are allowed
623  if (av_strstart(proto_name, "file", NULL)) {
624  if (strcmp(c->allowed_extensions, "ALL") && !av_match_ext(url, c->allowed_extensions)) {
625  av_log(s, AV_LOG_ERROR,
626  "Filename extension of \'%s\' is not a common multimedia extension, blocked for security reasons.\n"
627  "If you wish to override this adjust allowed_extensions, you can set it to \'ALL\' to allow all\n",
628  url);
629  return AVERROR_INVALIDDATA;
630  }
631  } else if (av_strstart(proto_name, "http", NULL)) {
632  ;
633  } else
634  return AVERROR_INVALIDDATA;
635 
636  if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':')
637  ;
638  else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':')
639  ;
640  else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))
641  return AVERROR_INVALIDDATA;
642 
643  ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
644  if (ret >= 0) {
645  // update cookies on http response with setcookies.
646  char *new_cookies = NULL;
647 
648  if (!(s->flags & AVFMT_FLAG_CUSTOM_IO))
649  av_opt_get(*pb, "cookies", AV_OPT_SEARCH_CHILDREN, (uint8_t**)&new_cookies);
650 
651  if (new_cookies) {
652  av_free(c->cookies);
653  c->cookies = new_cookies;
654  }
655 
656  av_dict_set(&opts, "cookies", c->cookies, 0);
657  }
658 
659  av_dict_free(&tmp);
660 
661  if (is_http)
662  *is_http = av_strstart(proto_name, "http", NULL);
663 
664  return ret;
665 }
666 
667 static int parse_playlist(HLSContext *c, const char *url,
668  struct playlist *pls, AVIOContext *in)
669 {
670  int ret = 0, is_segment = 0, is_variant = 0;
671  int64_t duration = 0;
672  enum KeyType key_type = KEY_NONE;
673  uint8_t iv[16] = "";
674  int has_iv = 0;
675  char key[MAX_URL_SIZE] = "";
676  char line[MAX_URL_SIZE];
677  const char *ptr;
678  int close_in = 0;
679  int64_t seg_offset = 0;
680  int64_t seg_size = -1;
681  uint8_t *new_url = NULL;
682  struct variant_info variant_info;
683  char tmp_str[MAX_URL_SIZE];
684  struct segment *cur_init_section = NULL;
685 
686  if (!in) {
687 #if 1
689  close_in = 1;
690  /* Some HLS servers don't like being sent the range header */
691  av_dict_set(&opts, "seekable", "0", 0);
692 
693  // broker prior HTTP options that should be consistent across requests
694  av_dict_set(&opts, "user_agent", c->user_agent, 0);
695  av_dict_set(&opts, "cookies", c->cookies, 0);
696  av_dict_set(&opts, "headers", c->headers, 0);
697  av_dict_set(&opts, "http_proxy", c->http_proxy, 0);
698 
699  ret = c->ctx->io_open(c->ctx, &in, url, AVIO_FLAG_READ, &opts);
700  av_dict_free(&opts);
701  if (ret < 0)
702  return ret;
703 #else
704  ret = open_in(c, &in, url);
705  if (ret < 0)
706  return ret;
707  close_in = 1;
708 #endif
709  }
710 
711  if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >= 0)
712  url = new_url;
713 
714  read_chomp_line(in, line, sizeof(line));
715  if (strcmp(line, "#EXTM3U")) {
716  ret = AVERROR_INVALIDDATA;
717  goto fail;
718  }
719 
720  if (pls) {
721  free_segment_list(pls);
722  pls->finished = 0;
723  pls->type = PLS_TYPE_UNSPECIFIED;
724  }
725  while (!avio_feof(in)) {
726  read_chomp_line(in, line, sizeof(line));
727  if (av_strstart(line, "#EXT-X-STREAM-INF:", &ptr)) {
728  is_variant = 1;
729  memset(&variant_info, 0, sizeof(variant_info));
731  &variant_info);
732  } else if (av_strstart(line, "#EXT-X-KEY:", &ptr)) {
733  struct key_info info = {{0}};
735  &info);
736  key_type = KEY_NONE;
737  has_iv = 0;
738  if (!strcmp(info.method, "AES-128"))
739  key_type = KEY_AES_128;
740  if (!strcmp(info.method, "SAMPLE-AES"))
741  key_type = KEY_SAMPLE_AES;
742  if (!strncmp(info.iv, "0x", 2) || !strncmp(info.iv, "0X", 2)) {
743  ff_hex_to_data(iv, info.iv + 2);
744  has_iv = 1;
745  }
746  av_strlcpy(key, info.uri, sizeof(key));
747  } else if (av_strstart(line, "#EXT-X-MEDIA:", &ptr)) {
748  struct rendition_info info = {{0}};
750  &info);
751  new_rendition(c, &info, url);
752  } else if (av_strstart(line, "#EXT-X-TARGETDURATION:", &ptr)) {
753  ret = ensure_playlist(c, &pls, url);
754  if (ret < 0)
755  goto fail;
756  pls->target_duration = strtoll(ptr, NULL, 10) * AV_TIME_BASE;
757  } else if (av_strstart(line, "#EXT-X-MEDIA-SEQUENCE:", &ptr)) {
758  ret = ensure_playlist(c, &pls, url);
759  if (ret < 0)
760  goto fail;
761  pls->start_seq_no = atoi(ptr);
762  } else if (av_strstart(line, "#EXT-X-PLAYLIST-TYPE:", &ptr)) {
763  ret = ensure_playlist(c, &pls, url);
764  if (ret < 0)
765  goto fail;
766  if (!strcmp(ptr, "EVENT"))
767  pls->type = PLS_TYPE_EVENT;
768  else if (!strcmp(ptr, "VOD"))
769  pls->type = PLS_TYPE_VOD;
770  } else if (av_strstart(line, "#EXT-X-MAP:", &ptr)) {
771  struct init_section_info info = {{0}};
772  ret = ensure_playlist(c, &pls, url);
773  if (ret < 0)
774  goto fail;
776  &info);
777  cur_init_section = new_init_section(pls, &info, url);
778  } else if (av_strstart(line, "#EXT-X-ENDLIST", &ptr)) {
779  if (pls)
780  pls->finished = 1;
781  } else if (av_strstart(line, "#EXTINF:", &ptr)) {
782  is_segment = 1;
783  duration = atof(ptr) * AV_TIME_BASE;
784  } else if (av_strstart(line, "#EXT-X-BYTERANGE:", &ptr)) {
785  seg_size = strtoll(ptr, NULL, 10);
786  ptr = strchr(ptr, '@');
787  if (ptr)
788  seg_offset = strtoll(ptr+1, NULL, 10);
789  } else if (av_strstart(line, "#", NULL)) {
790  continue;
791  } else if (line[0]) {
792  if (is_variant) {
793  if (!new_variant(c, &variant_info, line, url)) {
794  ret = AVERROR(ENOMEM);
795  goto fail;
796  }
797  is_variant = 0;
798  }
799  if (is_segment) {
800  struct segment *seg;
801  if (!pls) {
802  if (!new_variant(c, 0, url, NULL)) {
803  ret = AVERROR(ENOMEM);
804  goto fail;
805  }
806  pls = c->playlists[c->n_playlists - 1];
807  }
808  seg = av_malloc(sizeof(struct segment));
809  if (!seg) {
810  ret = AVERROR(ENOMEM);
811  goto fail;
812  }
813  seg->duration = duration;
814  seg->key_type = key_type;
815  if (has_iv) {
816  memcpy(seg->iv, iv, sizeof(iv));
817  } else {
818  int seq = pls->start_seq_no + pls->n_segments;
819  memset(seg->iv, 0, sizeof(seg->iv));
820  AV_WB32(seg->iv + 12, seq);
821  }
822 
823  if (key_type != KEY_NONE) {
824  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, key);
825  seg->key = av_strdup(tmp_str);
826  if (!seg->key) {
827  av_free(seg);
828  ret = AVERROR(ENOMEM);
829  goto fail;
830  }
831  } else {
832  seg->key = NULL;
833  }
834 
835  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, line);
836  seg->url = av_strdup(tmp_str);
837  if (!seg->url) {
838  av_free(seg->key);
839  av_free(seg);
840  ret = AVERROR(ENOMEM);
841  goto fail;
842  }
843 
844  dynarray_add(&pls->segments, &pls->n_segments, seg);
845  is_segment = 0;
846 
847  seg->size = seg_size;
848  if (seg_size >= 0) {
849  seg->url_offset = seg_offset;
850  seg_offset += seg_size;
851  seg_size = -1;
852  } else {
853  seg->url_offset = 0;
854  seg_offset = 0;
855  }
856 
857  seg->init_section = cur_init_section;
858  }
859  }
860  }
861  if (pls)
863 
864 fail:
865  av_free(new_url);
866  if (close_in)
867  ff_format_io_close(c->ctx, &in);
868  return ret;
869 }
870 
871 static struct segment *current_segment(struct playlist *pls)
872 {
873  return pls->segments[pls->cur_seq_no - pls->start_seq_no];
874 }
875 
879 };
880 
881 static int read_from_url(struct playlist *pls, struct segment *seg,
882  uint8_t *buf, int buf_size,
883  enum ReadFromURLMode mode)
884 {
885  int ret;
886 
887  /* limit read if the segment was only a part of a file */
888  if (seg->size >= 0)
889  buf_size = FFMIN(buf_size, seg->size - pls->cur_seg_offset);
890 
891  if (mode == READ_COMPLETE) {
892  ret = avio_read(pls->input, buf, buf_size);
893  if (ret != buf_size)
894  av_log(NULL, AV_LOG_ERROR, "Could not read complete segment.\n");
895  } else
896  ret = avio_read(pls->input, buf, buf_size);
897 
898  if (ret > 0)
899  pls->cur_seg_offset += ret;
900 
901  return ret;
902 }
903 
904 /* Parse the raw ID3 data and pass contents to caller */
906  AVDictionary **metadata, int64_t *dts,
907  ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta **extra_meta)
908 {
909  static const char id3_priv_owner_ts[] = "com.apple.streaming.transportStreamTimestamp";
910  ID3v2ExtraMeta *meta;
911 
912  ff_id3v2_read_dict(pb, metadata, ID3v2_DEFAULT_MAGIC, extra_meta);
913  for (meta = *extra_meta; meta; meta = meta->next) {
914  if (!strcmp(meta->tag, "PRIV")) {
915  ID3v2ExtraMetaPRIV *priv = meta->data;
916  if (priv->datasize == 8 && !strcmp(priv->owner, id3_priv_owner_ts)) {
917  /* 33-bit MPEG timestamp */
918  int64_t ts = AV_RB64(priv->data);
919  av_log(s, AV_LOG_DEBUG, "HLS ID3 audio timestamp %"PRId64"\n", ts);
920  if ((ts & ~((1ULL << 33) - 1)) == 0)
921  *dts = ts;
922  else
923  av_log(s, AV_LOG_ERROR, "Invalid HLS ID3 audio timestamp %"PRId64"\n", ts);
924  }
925  } else if (!strcmp(meta->tag, "APIC") && apic)
926  *apic = meta->data;
927  }
928 }
929 
930 /* Check if the ID3 metadata contents have changed */
931 static int id3_has_changed_values(struct playlist *pls, AVDictionary *metadata,
932  ID3v2ExtraMetaAPIC *apic)
933 {
934  AVDictionaryEntry *entry = NULL;
935  AVDictionaryEntry *oldentry;
936  /* check that no keys have changed values */
937  while ((entry = av_dict_get(metadata, "", entry, AV_DICT_IGNORE_SUFFIX))) {
938  oldentry = av_dict_get(pls->id3_initial, entry->key, NULL, AV_DICT_MATCH_CASE);
939  if (!oldentry || strcmp(oldentry->value, entry->value) != 0)
940  return 1;
941  }
942 
943  /* check if apic appeared */
944  if (apic && (pls->ctx->nb_streams != 2 || !pls->ctx->streams[1]->attached_pic.data))
945  return 1;
946 
947  if (apic) {
948  int size = pls->ctx->streams[1]->attached_pic.size;
949  if (size != apic->buf->size - AV_INPUT_BUFFER_PADDING_SIZE)
950  return 1;
951 
952  if (memcmp(apic->buf->data, pls->ctx->streams[1]->attached_pic.data, size) != 0)
953  return 1;
954  }
955 
956  return 0;
957 }
958 
959 /* Parse ID3 data and handle the found data */
960 static void handle_id3(AVIOContext *pb, struct playlist *pls)
961 {
962  AVDictionary *metadata = NULL;
963  ID3v2ExtraMetaAPIC *apic = NULL;
964  ID3v2ExtraMeta *extra_meta = NULL;
965  int64_t timestamp = AV_NOPTS_VALUE;
966 
967  parse_id3(pls->ctx, pb, &metadata, &timestamp, &apic, &extra_meta);
968 
969  if (timestamp != AV_NOPTS_VALUE) {
970  pls->id3_mpegts_timestamp = timestamp;
971  pls->id3_offset = 0;
972  }
973 
974  if (!pls->id3_found) {
975  /* initial ID3 tags */
977  pls->id3_found = 1;
978 
979  /* get picture attachment and set text metadata */
980  if (pls->ctx->nb_streams)
981  ff_id3v2_parse_apic(pls->ctx, &extra_meta);
982  else
983  /* demuxer not yet opened, defer picture attachment */
984  pls->id3_deferred_extra = extra_meta;
985 
986  av_dict_copy(&pls->ctx->metadata, metadata, 0);
987  pls->id3_initial = metadata;
988 
989  } else {
990  if (!pls->id3_changed && id3_has_changed_values(pls, metadata, apic)) {
991  avpriv_report_missing_feature(pls->ctx, "Changing ID3 metadata in HLS audio elementary stream");
992  pls->id3_changed = 1;
993  }
994  av_dict_free(&metadata);
995  }
996 
997  if (!pls->id3_deferred_extra)
998  ff_id3v2_free_extra_meta(&extra_meta);
999 }
1000 
1001 static void intercept_id3(struct playlist *pls, uint8_t *buf,
1002  int buf_size, int *len)
1003 {
1004  /* intercept id3 tags, we do not want to pass them to the raw
1005  * demuxer on all segment switches */
1006  int bytes;
1007  int id3_buf_pos = 0;
1008  int fill_buf = 0;
1009  struct segment *seg = current_segment(pls);
1010 
1011  /* gather all the id3 tags */
1012  while (1) {
1013  /* see if we can retrieve enough data for ID3 header */
1014  if (*len < ID3v2_HEADER_SIZE && buf_size >= ID3v2_HEADER_SIZE) {
1015  bytes = read_from_url(pls, seg, buf + *len, ID3v2_HEADER_SIZE - *len, READ_COMPLETE);
1016  if (bytes > 0) {
1017 
1018  if (bytes == ID3v2_HEADER_SIZE - *len)
1019  /* no EOF yet, so fill the caller buffer again after
1020  * we have stripped the ID3 tags */
1021  fill_buf = 1;
1022 
1023  *len += bytes;
1024 
1025  } else if (*len <= 0) {
1026  /* error/EOF */
1027  *len = bytes;
1028  fill_buf = 0;
1029  }
1030  }
1031 
1032  if (*len < ID3v2_HEADER_SIZE)
1033  break;
1034 
1035  if (ff_id3v2_match(buf, ID3v2_DEFAULT_MAGIC)) {
1036  int64_t maxsize = seg->size >= 0 ? seg->size : 1024*1024;
1037  int taglen = ff_id3v2_tag_len(buf);
1038  int tag_got_bytes = FFMIN(taglen, *len);
1039  int remaining = taglen - tag_got_bytes;
1040 
1041  if (taglen > maxsize) {
1042  av_log(pls->ctx, AV_LOG_ERROR, "Too large HLS ID3 tag (%d > %"PRId64" bytes)\n",
1043  taglen, maxsize);
1044  break;
1045  }
1046 
1047  /*
1048  * Copy the id3 tag to our temporary id3 buffer.
1049  * We could read a small id3 tag directly without memcpy, but
1050  * we would still need to copy the large tags, and handling
1051  * both of those cases together with the possibility for multiple
1052  * tags would make the handling a bit complex.
1053  */
1054  pls->id3_buf = av_fast_realloc(pls->id3_buf, &pls->id3_buf_size, id3_buf_pos + taglen);
1055  if (!pls->id3_buf)
1056  break;
1057  memcpy(pls->id3_buf + id3_buf_pos, buf, tag_got_bytes);
1058  id3_buf_pos += tag_got_bytes;
1059 
1060  /* strip the intercepted bytes */
1061  *len -= tag_got_bytes;
1062  memmove(buf, buf + tag_got_bytes, *len);
1063  av_log(pls->ctx, AV_LOG_DEBUG, "Stripped %d HLS ID3 bytes\n", tag_got_bytes);
1064 
1065  if (remaining > 0) {
1066  /* read the rest of the tag in */
1067  if (read_from_url(pls, seg, pls->id3_buf + id3_buf_pos, remaining, READ_COMPLETE) != remaining)
1068  break;
1069  id3_buf_pos += remaining;
1070  av_log(pls->ctx, AV_LOG_DEBUG, "Stripped additional %d HLS ID3 bytes\n", remaining);
1071  }
1072 
1073  } else {
1074  /* no more ID3 tags */
1075  break;
1076  }
1077  }
1078 
1079  /* re-fill buffer for the caller unless EOF */
1080  if (*len >= 0 && (fill_buf || *len == 0)) {
1081  bytes = read_from_url(pls, seg, buf + *len, buf_size - *len, READ_NORMAL);
1082 
1083  /* ignore error if we already had some data */
1084  if (bytes >= 0)
1085  *len += bytes;
1086  else if (*len == 0)
1087  *len = bytes;
1088  }
1089 
1090  if (pls->id3_buf) {
1091  /* Now parse all the ID3 tags */
1092  AVIOContext id3ioctx;
1093  ffio_init_context(&id3ioctx, pls->id3_buf, id3_buf_pos, 0, NULL, NULL, NULL, NULL);
1094  handle_id3(&id3ioctx, pls);
1095  }
1096 
1097  if (pls->is_id3_timestamped == -1)
1099 }
1100 
1101 static int open_input(HLSContext *c, struct playlist *pls, struct segment *seg)
1102 {
1103  AVDictionary *opts = NULL;
1104  int ret;
1105  int is_http = 0;
1106 
1107  // broker prior HTTP options that should be consistent across requests
1108  av_dict_set(&opts, "user_agent", c->user_agent, 0);
1109  av_dict_set(&opts, "cookies", c->cookies, 0);
1110  av_dict_set(&opts, "headers", c->headers, 0);
1111  av_dict_set(&opts, "http_proxy", c->http_proxy, 0);
1112  av_dict_set(&opts, "seekable", "0", 0);
1113 
1114  if (seg->size >= 0) {
1115  /* try to restrict the HTTP request to the part we want
1116  * (if this is in fact a HTTP request) */
1117  av_dict_set_int(&opts, "offset", seg->url_offset, 0);
1118  av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
1119  }
1120 
1121  av_log(pls->parent, AV_LOG_VERBOSE, "HLS request for url '%s', offset %"PRId64", playlist %d\n",
1122  seg->url, seg->url_offset, pls->index);
1123 
1124  if (seg->key_type == KEY_NONE) {
1125  ret = open_url(pls->parent, &pls->input, seg->url, c->avio_opts, opts, &is_http);
1126  } else if (seg->key_type == KEY_AES_128) {
1127  AVDictionary *opts2 = NULL;
1128  char iv[33], key[33], url[MAX_URL_SIZE];
1129  if (strcmp(seg->key, pls->key_url)) {
1130  AVIOContext *pb;
1131  if (open_url(pls->parent, &pb, seg->key, c->avio_opts, opts, NULL) == 0) {
1132  ret = avio_read(pb, pls->key, sizeof(pls->key));
1133  if (ret != sizeof(pls->key)) {
1134  av_log(NULL, AV_LOG_ERROR, "Unable to read key file %s\n",
1135  seg->key);
1136  }
1137  ff_format_io_close(pls->parent, &pb);
1138  } else {
1139  av_log(NULL, AV_LOG_ERROR, "Unable to open key file %s\n",
1140  seg->key);
1141  }
1142  av_strlcpy(pls->key_url, seg->key, sizeof(pls->key_url));
1143  }
1144  ff_data_to_hex(iv, seg->iv, sizeof(seg->iv), 0);
1145  ff_data_to_hex(key, pls->key, sizeof(pls->key), 0);
1146  iv[32] = key[32] = '\0';
1147  if (strstr(seg->url, "://"))
1148  snprintf(url, sizeof(url), "crypto+%s", seg->url);
1149  else
1150  snprintf(url, sizeof(url), "crypto:%s", seg->url);
1151 
1152  av_dict_copy(&opts2, c->avio_opts, 0);
1153  av_dict_set(&opts2, "key", key, 0);
1154  av_dict_set(&opts2, "iv", iv, 0);
1155 
1156  ret = open_url(pls->parent, &pls->input, url, opts2, opts, &is_http);
1157 
1158  av_dict_free(&opts2);
1159 
1160  if (ret < 0) {
1161  goto cleanup;
1162  }
1163  ret = 0;
1164  } else if (seg->key_type == KEY_SAMPLE_AES) {
1165  av_log(pls->parent, AV_LOG_ERROR,
1166  "SAMPLE-AES encryption is not supported yet\n");
1167  ret = AVERROR_PATCHWELCOME;
1168  }
1169  else
1170  ret = AVERROR(ENOSYS);
1171 
1172  /* Seek to the requested position. If this was a HTTP request, the offset
1173  * should already be where want it to, but this allows e.g. local testing
1174  * without a HTTP server.
1175  *
1176  * This is not done for HTTP at all as avio_seek() does internal bookkeeping
1177  * of file offset which is out-of-sync with the actual offset when "offset"
1178  * AVOption is used with http protocol, causing the seek to not be a no-op
1179  * as would be expected. Wrong offset received from the server will not be
1180  * noticed without the call, though.
1181  */
1182  if (ret == 0 && !is_http && seg->key_type == KEY_NONE && seg->url_offset) {
1183  int64_t seekret = avio_seek(pls->input, seg->url_offset, SEEK_SET);
1184  if (seekret < 0) {
1185  av_log(pls->parent, AV_LOG_ERROR, "Unable to seek to offset %"PRId64" of HLS segment '%s'\n", seg->url_offset, seg->url);
1186  ret = seekret;
1187  ff_format_io_close(pls->parent, &pls->input);
1188  }
1189  }
1190 
1191 cleanup:
1192  av_dict_free(&opts);
1193  pls->cur_seg_offset = 0;
1194  return ret;
1195 }
1196 
1197 static int update_init_section(struct playlist *pls, struct segment *seg)
1198 {
1199  static const int max_init_section_size = 1024*1024;
1200  HLSContext *c = pls->parent->priv_data;
1201  int64_t sec_size;
1202  int64_t urlsize;
1203  int ret;
1204 
1205  if (seg->init_section == pls->cur_init_section)
1206  return 0;
1207 
1208  pls->cur_init_section = NULL;
1209 
1210  if (!seg->init_section)
1211  return 0;
1212 
1213  ret = open_input(c, pls, seg->init_section);
1214  if (ret < 0) {
1216  "Failed to open an initialization section in playlist %d\n",
1217  pls->index);
1218  return ret;
1219  }
1220 
1221  if (seg->init_section->size >= 0)
1222  sec_size = seg->init_section->size;
1223  else if ((urlsize = avio_size(pls->input)) >= 0)
1224  sec_size = urlsize;
1225  else
1226  sec_size = max_init_section_size;
1227 
1228  av_log(pls->parent, AV_LOG_DEBUG,
1229  "Downloading an initialization section of size %"PRId64"\n",
1230  sec_size);
1231 
1232  sec_size = FFMIN(sec_size, max_init_section_size);
1233 
1234  av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size);
1235 
1236  ret = read_from_url(pls, seg->init_section, pls->init_sec_buf,
1238  ff_format_io_close(pls->parent, &pls->input);
1239 
1240  if (ret < 0)
1241  return ret;
1242 
1243  pls->cur_init_section = seg->init_section;
1244  pls->init_sec_data_len = ret;
1245  pls->init_sec_buf_read_offset = 0;
1246 
1247  /* spec says audio elementary streams do not have media initialization
1248  * sections, so there should be no ID3 timestamps */
1249  pls->is_id3_timestamped = 0;
1250 
1251  return 0;
1252 }
1253 
1254 static int64_t default_reload_interval(struct playlist *pls)
1255 {
1256  return pls->n_segments > 0 ?
1257  pls->segments[pls->n_segments - 1]->duration :
1258  pls->target_duration;
1259 }
1260 
1261 static int read_data(void *opaque, uint8_t *buf, int buf_size)
1262 {
1263  struct playlist *v = opaque;
1264  HLSContext *c = v->parent->priv_data;
1265  int ret, i;
1266  int just_opened = 0;
1267  int reload_count = 0;
1268 
1269 restart:
1270  if (!v->needed)
1271  return AVERROR_EOF;
1272 
1273  if (!v->input) {
1274  int64_t reload_interval;
1275  struct segment *seg;
1276 
1277  /* Check that the playlist is still needed before opening a new
1278  * segment. */
1279  if (v->ctx && v->ctx->nb_streams) {
1280  v->needed = 0;
1281  for (i = 0; i < v->n_main_streams; i++) {
1282  if (v->main_streams[i]->discard < AVDISCARD_ALL) {
1283  v->needed = 1;
1284  break;
1285  }
1286  }
1287  }
1288  if (!v->needed) {
1289  av_log(v->parent, AV_LOG_INFO, "No longer receiving playlist %d\n",
1290  v->index);
1291  return AVERROR_EOF;
1292  }
1293 
1294  /* If this is a live stream and the reload interval has elapsed since
1295  * the last playlist reload, reload the playlists now. */
1296  reload_interval = default_reload_interval(v);
1297 
1298 reload:
1299  reload_count++;
1300  if (reload_count > c->max_reload)
1301  return AVERROR_EOF;
1302  if (!v->finished &&
1303  av_gettime_relative() - v->last_load_time >= reload_interval) {
1304  if ((ret = parse_playlist(c, v->url, v, NULL)) < 0) {
1305  av_log(v->parent, AV_LOG_WARNING, "Failed to reload playlist %d\n",
1306  v->index);
1307  return ret;
1308  }
1309  /* If we need to reload the playlist again below (if
1310  * there's still no more segments), switch to a reload
1311  * interval of half the target duration. */
1312  reload_interval = v->target_duration / 2;
1313  }
1314  if (v->cur_seq_no < v->start_seq_no) {
1316  "skipping %d segments ahead, expired from playlists\n",
1317  v->start_seq_no - v->cur_seq_no);
1318  v->cur_seq_no = v->start_seq_no;
1319  }
1320  if (v->cur_seq_no >= v->start_seq_no + v->n_segments) {
1321  if (v->finished)
1322  return AVERROR_EOF;
1323  while (av_gettime_relative() - v->last_load_time < reload_interval) {
1325  return AVERROR_EXIT;
1326  av_usleep(100*1000);
1327  }
1328  /* Enough time has elapsed since the last reload */
1329  goto reload;
1330  }
1331 
1332  seg = current_segment(v);
1333 
1334  /* load/update Media Initialization Section, if any */
1335  ret = update_init_section(v, seg);
1336  if (ret)
1337  return ret;
1338 
1339  ret = open_input(c, v, seg);
1340  if (ret < 0) {
1342  return AVERROR_EXIT;
1343  av_log(v->parent, AV_LOG_WARNING, "Failed to open segment of playlist %d\n",
1344  v->index);
1345  v->cur_seq_no += 1;
1346  goto reload;
1347  }
1348  just_opened = 1;
1349  }
1350 
1352  /* Push init section out first before first actual segment */
1353  int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size);
1354  memcpy(buf, v->init_sec_buf, copy_size);
1355  v->init_sec_buf_read_offset += copy_size;
1356  return copy_size;
1357  }
1358 
1359  ret = read_from_url(v, current_segment(v), buf, buf_size, READ_NORMAL);
1360  if (ret > 0) {
1361  if (just_opened && v->is_id3_timestamped != 0) {
1362  /* Intercept ID3 tags here, elementary audio streams are required
1363  * to convey timestamps using them in the beginning of each segment. */
1364  intercept_id3(v, buf, buf_size, &ret);
1365  }
1366 
1367  return ret;
1368  }
1369  ff_format_io_close(v->parent, &v->input);
1370  v->cur_seq_no++;
1371 
1372  c->cur_seq_no = v->cur_seq_no;
1373 
1374  goto restart;
1375 }
1376 
1377 static void add_renditions_to_variant(HLSContext *c, struct variant *var,
1378  enum AVMediaType type, const char *group_id)
1379 {
1380  int i;
1381 
1382  for (i = 0; i < c->n_renditions; i++) {
1383  struct rendition *rend = c->renditions[i];
1384 
1385  if (rend->type == type && !strcmp(rend->group_id, group_id)) {
1386 
1387  if (rend->playlist)
1388  /* rendition is an external playlist
1389  * => add the playlist to the variant */
1390  dynarray_add(&var->playlists, &var->n_playlists, rend->playlist);
1391  else
1392  /* rendition is part of the variant main Media Playlist
1393  * => add the rendition to the main Media Playlist */
1394  dynarray_add(&var->playlists[0]->renditions,
1395  &var->playlists[0]->n_renditions,
1396  rend);
1397  }
1398  }
1399 }
1400 
1402  enum AVMediaType type)
1403 {
1404  int rend_idx = 0;
1405  int i;
1406 
1407  for (i = 0; i < pls->n_main_streams; i++) {
1408  AVStream *st = pls->main_streams[i];
1409 
1410  if (st->codecpar->codec_type != type)
1411  continue;
1412 
1413  for (; rend_idx < pls->n_renditions; rend_idx++) {
1414  struct rendition *rend = pls->renditions[rend_idx];
1415 
1416  if (rend->type != type)
1417  continue;
1418 
1419  if (rend->language[0])
1420  av_dict_set(&st->metadata, "language", rend->language, 0);
1421  if (rend->name[0])
1422  av_dict_set(&st->metadata, "comment", rend->name, 0);
1423 
1424  st->disposition |= rend->disposition;
1425  }
1426  if (rend_idx >=pls->n_renditions)
1427  break;
1428  }
1429 }
1430 
1431 /* if timestamp was in valid range: returns 1 and sets seq_no
1432  * if not: returns 0 and sets seq_no to closest segment */
1434  int64_t timestamp, int *seq_no)
1435 {
1436  int i;
1437  int64_t pos = c->first_timestamp == AV_NOPTS_VALUE ?
1438  0 : c->first_timestamp;
1439 
1440  if (timestamp < pos) {
1441  *seq_no = pls->start_seq_no;
1442  return 0;
1443  }
1444 
1445  for (i = 0; i < pls->n_segments; i++) {
1446  int64_t diff = pos + pls->segments[i]->duration - timestamp;
1447  if (diff > 0) {
1448  *seq_no = pls->start_seq_no + i;
1449  return 1;
1450  }
1451  pos += pls->segments[i]->duration;
1452  }
1453 
1454  *seq_no = pls->start_seq_no + pls->n_segments - 1;
1455 
1456  return 0;
1457 }
1458 
1459 static int select_cur_seq_no(HLSContext *c, struct playlist *pls)
1460 {
1461  int seq_no;
1462 
1463  if (!pls->finished && !c->first_packet &&
1465  /* reload the playlist since it was suspended */
1466  parse_playlist(c, pls->url, pls, NULL);
1467 
1468  /* If playback is already in progress (we are just selecting a new
1469  * playlist) and this is a complete file, find the matching segment
1470  * by counting durations. */
1471  if (pls->finished && c->cur_timestamp != AV_NOPTS_VALUE) {
1472  find_timestamp_in_playlist(c, pls, c->cur_timestamp, &seq_no);
1473  return seq_no;
1474  }
1475 
1476  if (!pls->finished) {
1477  if (!c->first_packet && /* we are doing a segment selection during playback */
1478  c->cur_seq_no >= pls->start_seq_no &&
1479  c->cur_seq_no < pls->start_seq_no + pls->n_segments)
1480  /* While spec 3.4.3 says that we cannot assume anything about the
1481  * content at the same sequence number on different playlists,
1482  * in practice this seems to work and doing it otherwise would
1483  * require us to download a segment to inspect its timestamps. */
1484  return c->cur_seq_no;
1485 
1486  /* If this is a live stream, start live_start_index segments from the
1487  * start or end */
1488  if (c->live_start_index < 0)
1489  return pls->start_seq_no + FFMAX(pls->n_segments + c->live_start_index, 0);
1490  else
1491  return pls->start_seq_no + FFMIN(c->live_start_index, pls->n_segments - 1);
1492  }
1493 
1494  /* Otherwise just start on the first segment. */
1495  return pls->start_seq_no;
1496 }
1497 
1499 {
1500  HLSContext *c = s->priv_data;
1501  static const char * const opts[] = {
1502  "headers", "http_proxy", "user_agent", "user-agent", "cookies", NULL };
1503  const char * const * opt = opts;
1504  uint8_t *buf;
1505  int ret = 0;
1506 
1507  while (*opt) {
1508  if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN | AV_OPT_ALLOW_NULL, &buf) >= 0) {
1509  ret = av_dict_set(&c->avio_opts, *opt, buf,
1511  if (ret < 0)
1512  return ret;
1513  }
1514  opt++;
1515  }
1516 
1517  return ret;
1518 }
1519 
1520 static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url,
1521  int flags, AVDictionary **opts)
1522 {
1523  av_log(s, AV_LOG_ERROR,
1524  "A HLS playlist item '%s' referred to an external file '%s'. "
1525  "Opening this file was forbidden for security reasons\n",
1526  s->filename, url);
1527  return AVERROR(EPERM);
1528 }
1529 
1530 static void add_stream_to_programs(AVFormatContext *s, struct playlist *pls, AVStream *stream)
1531 {
1532  HLSContext *c = s->priv_data;
1533  int i, j;
1534  int bandwidth = -1;
1535 
1536  for (i = 0; i < c->n_variants; i++) {
1537  struct variant *v = c->variants[i];
1538 
1539  for (j = 0; j < v->n_playlists; j++) {
1540  if (v->playlists[j] != pls)
1541  continue;
1542 
1543  av_program_add_stream_index(s, i, stream->index);
1544 
1545  if (bandwidth < 0)
1546  bandwidth = v->bandwidth;
1547  else if (bandwidth != v->bandwidth)
1548  bandwidth = -1; /* stream in multiple variants with different bandwidths */
1549  }
1550  }
1551 
1552  if (bandwidth >= 0)
1553  av_dict_set_int(&stream->metadata, "variant_bitrate", bandwidth, 0);
1554 }
1555 
1557 {
1558  int err;
1559 
1560  err = avcodec_parameters_copy(st->codecpar, ist->codecpar);
1561  if (err < 0)
1562  return err;
1563 
1564  if (pls->is_id3_timestamped) /* custom timestamps via id3 */
1565  avpriv_set_pts_info(st, 33, 1, MPEG_TIME_BASE);
1566  else
1568 
1569  st->internal->need_context_update = 1;
1570 
1571  return 0;
1572 }
1573 
1574 /* add new subdemuxer streams to our context, if any */
1576 {
1577  int err;
1578 
1579  while (pls->n_main_streams < pls->ctx->nb_streams) {
1580  int ist_idx = pls->n_main_streams;
1581  AVStream *st = avformat_new_stream(s, NULL);
1582  AVStream *ist = pls->ctx->streams[ist_idx];
1583 
1584  if (!st)
1585  return AVERROR(ENOMEM);
1586 
1587  st->id = pls->index;
1588  dynarray_add(&pls->main_streams, &pls->n_main_streams, st);
1589 
1590  add_stream_to_programs(s, pls, st);
1591 
1592  err = set_stream_info_from_input_stream(st, pls, ist);
1593  if (err < 0)
1594  return err;
1595  }
1596 
1597  return 0;
1598 }
1599 
1601 {
1602  HLSContext *c = s->priv_data;
1603  int flag_needed = 0;
1604  int i;
1605 
1606  for (i = 0; i < c->n_playlists; i++) {
1607  struct playlist *pls = c->playlists[i];
1608 
1609  if (pls->has_noheader_flag) {
1610  flag_needed = 1;
1611  break;
1612  }
1613  }
1614 
1615  if (flag_needed)
1617  else
1619 }
1620 
1622 {
1623  HLSContext *c = s->priv_data;
1624 
1625  free_playlist_list(c);
1626  free_variant_list(c);
1628 
1629  av_dict_free(&c->avio_opts);
1630 
1631  return 0;
1632 }
1633 
1635 {
1636  void *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb;
1637  HLSContext *c = s->priv_data;
1638  int ret = 0, i;
1639  int highest_cur_seq_no = 0;
1640 
1641  c->ctx = s;
1642  c->interrupt_callback = &s->interrupt_callback;
1643  c->strict_std_compliance = s->strict_std_compliance;
1644 
1645  c->first_packet = 1;
1646  c->first_timestamp = AV_NOPTS_VALUE;
1647  c->cur_timestamp = AV_NOPTS_VALUE;
1648 
1649  if (u) {
1650  // get the previous user agent & set back to null if string size is zero
1651  update_options(&c->user_agent, "user_agent", u);
1652 
1653  // get the previous cookies & set back to null if string size is zero
1654  update_options(&c->cookies, "cookies", u);
1655 
1656  // get the previous headers & set back to null if string size is zero
1657  update_options(&c->headers, "headers", u);
1658 
1659  // get the previous http proxt & set back to null if string size is zero
1660  update_options(&c->http_proxy, "http_proxy", u);
1661  }
1662 
1663  if ((ret = parse_playlist(c, s->filename, NULL, s->pb)) < 0)
1664  goto fail;
1665 
1666  if ((ret = save_avio_options(s)) < 0)
1667  goto fail;
1668 
1669  /* Some HLS servers don't like being sent the range header */
1670  av_dict_set(&c->avio_opts, "seekable", "0", 0);
1671 
1672  if (c->n_variants == 0) {
1673  av_log(NULL, AV_LOG_WARNING, "Empty playlist\n");
1674  ret = AVERROR_EOF;
1675  goto fail;
1676  }
1677  /* If the playlist only contained playlists (Master Playlist),
1678  * parse each individual playlist. */
1679  if (c->n_playlists > 1 || c->playlists[0]->n_segments == 0) {
1680  for (i = 0; i < c->n_playlists; i++) {
1681  struct playlist *pls = c->playlists[i];
1682  if ((ret = parse_playlist(c, pls->url, pls, NULL)) < 0)
1683  goto fail;
1684  }
1685  }
1686 
1687  if (c->variants[0]->playlists[0]->n_segments == 0) {
1688  av_log(NULL, AV_LOG_WARNING, "Empty playlist\n");
1689  ret = AVERROR_EOF;
1690  goto fail;
1691  }
1692 
1693  /* If this isn't a live stream, calculate the total duration of the
1694  * stream. */
1695  if (c->variants[0]->playlists[0]->finished) {
1696  int64_t duration = 0;
1697  for (i = 0; i < c->variants[0]->playlists[0]->n_segments; i++)
1698  duration += c->variants[0]->playlists[0]->segments[i]->duration;
1699  s->duration = duration;
1700  }
1701 
1702  /* Associate renditions with variants */
1703  for (i = 0; i < c->n_variants; i++) {
1704  struct variant *var = c->variants[i];
1705 
1706  if (var->audio_group[0])
1708  if (var->video_group[0])
1710  if (var->subtitles_group[0])
1712  }
1713 
1714  /* Create a program for each variant */
1715  for (i = 0; i < c->n_variants; i++) {
1716  struct variant *v = c->variants[i];
1717  AVProgram *program;
1718 
1719  program = av_new_program(s, i);
1720  if (!program)
1721  goto fail;
1722  av_dict_set_int(&program->metadata, "variant_bitrate", v->bandwidth, 0);
1723  }
1724 
1725  /* Select the starting segments */
1726  for (i = 0; i < c->n_playlists; i++) {
1727  struct playlist *pls = c->playlists[i];
1728 
1729  if (pls->n_segments == 0)
1730  continue;
1731 
1732  pls->cur_seq_no = select_cur_seq_no(c, pls);
1733  highest_cur_seq_no = FFMAX(highest_cur_seq_no, pls->cur_seq_no);
1734  }
1735 
1736  /* Open the demuxer for each playlist */
1737  for (i = 0; i < c->n_playlists; i++) {
1738  struct playlist *pls = c->playlists[i];
1739  AVInputFormat *in_fmt = NULL;
1740 
1741  if (!(pls->ctx = avformat_alloc_context())) {
1742  ret = AVERROR(ENOMEM);
1743  goto fail;
1744  }
1745 
1746  if (pls->n_segments == 0)
1747  continue;
1748 
1749  pls->index = i;
1750  pls->needed = 1;
1751  pls->parent = s;
1752 
1753  /*
1754  * If this is a live stream and this playlist looks like it is one segment
1755  * behind, try to sync it up so that every substream starts at the same
1756  * time position (so e.g. avformat_find_stream_info() will see packets from
1757  * all active streams within the first few seconds). This is not very generic,
1758  * though, as the sequence numbers are technically independent.
1759  */
1760  if (!pls->finished && pls->cur_seq_no == highest_cur_seq_no - 1 &&
1761  highest_cur_seq_no < pls->start_seq_no + pls->n_segments) {
1762  pls->cur_seq_no = highest_cur_seq_no;
1763  }
1764 
1766  if (!pls->read_buffer){
1767  ret = AVERROR(ENOMEM);
1768  avformat_free_context(pls->ctx);
1769  pls->ctx = NULL;
1770  goto fail;
1771  }
1772  ffio_init_context(&pls->pb, pls->read_buffer, INITIAL_BUFFER_SIZE, 0, pls,
1773  read_data, NULL, NULL);
1774  pls->pb.seekable = 0;
1775  ret = av_probe_input_buffer(&pls->pb, &in_fmt, pls->segments[0]->url,
1776  NULL, 0, 0);
1777  if (ret < 0) {
1778  /* Free the ctx - it isn't initialized properly at this point,
1779  * so avformat_close_input shouldn't be called. If
1780  * avformat_open_input fails below, it frees and zeros the
1781  * context, so it doesn't need any special treatment like this. */
1782  av_log(s, AV_LOG_ERROR, "Error when loading first segment '%s'\n", pls->segments[0]->url);
1783  avformat_free_context(pls->ctx);
1784  pls->ctx = NULL;
1785  goto fail;
1786  }
1787  pls->ctx->pb = &pls->pb;
1788  pls->ctx->io_open = nested_io_open;
1789  pls->ctx->flags |= s->flags & ~AVFMT_FLAG_CUSTOM_IO;
1790 
1791  if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
1792  goto fail;
1793 
1794  ret = avformat_open_input(&pls->ctx, pls->segments[0]->url, in_fmt, NULL);
1795  if (ret < 0)
1796  goto fail;
1797 
1798  if (pls->id3_deferred_extra && pls->ctx->nb_streams == 1) {
1802  pls->id3_deferred_extra = NULL;
1803  }
1804 
1805  if (pls->is_id3_timestamped == -1)
1806  av_log(s, AV_LOG_WARNING, "No expected HTTP requests have been made\n");
1807 
1808  /*
1809  * For ID3 timestamped raw audio streams we need to detect the packet
1810  * durations to calculate timestamps in fill_timing_for_id3_timestamped_stream(),
1811  * but for other streams we can rely on our user calling avformat_find_stream_info()
1812  * on us if they want to.
1813  */
1814  if (pls->is_id3_timestamped) {
1815  ret = avformat_find_stream_info(pls->ctx, NULL);
1816  if (ret < 0)
1817  goto fail;
1818  }
1819 
1820  pls->has_noheader_flag = !!(pls->ctx->ctx_flags & AVFMTCTX_NOHEADER);
1821 
1822  /* Create new AVStreams for each stream in this playlist */
1823  ret = update_streams_from_subdemuxer(s, pls);
1824  if (ret < 0)
1825  goto fail;
1826 
1830  }
1831 
1833 
1834  return 0;
1835 fail:
1836  hls_close(s);
1837  return ret;
1838 }
1839 
1840 static int recheck_discard_flags(AVFormatContext *s, int first)
1841 {
1842  HLSContext *c = s->priv_data;
1843  int i, changed = 0;
1844 
1845  /* Check if any new streams are needed */
1846  for (i = 0; i < c->n_playlists; i++)
1847  c->playlists[i]->cur_needed = 0;
1848 
1849  for (i = 0; i < s->nb_streams; i++) {
1850  AVStream *st = s->streams[i];
1851  struct playlist *pls = c->playlists[s->streams[i]->id];
1852  if (st->discard < AVDISCARD_ALL)
1853  pls->cur_needed = 1;
1854  }
1855  for (i = 0; i < c->n_playlists; i++) {
1856  struct playlist *pls = c->playlists[i];
1857  if (pls->cur_needed && !pls->needed) {
1858  pls->needed = 1;
1859  changed = 1;
1860  pls->cur_seq_no = select_cur_seq_no(c, pls);
1861  pls->pb.eof_reached = 0;
1862  if (c->cur_timestamp != AV_NOPTS_VALUE) {
1863  /* catch up */
1864  pls->seek_timestamp = c->cur_timestamp;
1865  pls->seek_flags = AVSEEK_FLAG_ANY;
1866  pls->seek_stream_index = -1;
1867  }
1868  av_log(s, AV_LOG_INFO, "Now receiving playlist %d, segment %d\n", i, pls->cur_seq_no);
1869  } else if (first && !pls->cur_needed && pls->needed) {
1870  if (pls->input)
1871  ff_format_io_close(pls->parent, &pls->input);
1872  pls->needed = 0;
1873  changed = 1;
1874  av_log(s, AV_LOG_INFO, "No longer receiving playlist %d\n", i);
1875  }
1876  }
1877  return changed;
1878 }
1879 
1881 {
1882  if (pls->id3_offset >= 0) {
1883  pls->pkt.dts = pls->id3_mpegts_timestamp +
1884  av_rescale_q(pls->id3_offset,
1885  pls->ctx->streams[pls->pkt.stream_index]->time_base,
1887  if (pls->pkt.duration)
1888  pls->id3_offset += pls->pkt.duration;
1889  else
1890  pls->id3_offset = -1;
1891  } else {
1892  /* there have been packets with unknown duration
1893  * since the last id3 tag, should not normally happen */
1894  pls->pkt.dts = AV_NOPTS_VALUE;
1895  }
1896 
1897  if (pls->pkt.duration)
1898  pls->pkt.duration = av_rescale_q(pls->pkt.duration,
1899  pls->ctx->streams[pls->pkt.stream_index]->time_base,
1901 
1902  pls->pkt.pts = AV_NOPTS_VALUE;
1903 }
1904 
1905 static AVRational get_timebase(struct playlist *pls)
1906 {
1907  if (pls->is_id3_timestamped)
1908  return MPEG_TIME_BASE_Q;
1909 
1910  return pls->ctx->streams[pls->pkt.stream_index]->time_base;
1911 }
1912 
1913 static int compare_ts_with_wrapdetect(int64_t ts_a, struct playlist *pls_a,
1914  int64_t ts_b, struct playlist *pls_b)
1915 {
1916  int64_t scaled_ts_a = av_rescale_q(ts_a, get_timebase(pls_a), MPEG_TIME_BASE_Q);
1917  int64_t scaled_ts_b = av_rescale_q(ts_b, get_timebase(pls_b), MPEG_TIME_BASE_Q);
1918 
1919  return av_compare_mod(scaled_ts_a, scaled_ts_b, 1LL << 33);
1920 }
1921 
1923 {
1924  HLSContext *c = s->priv_data;
1925  int ret, i, minplaylist = -1;
1926 
1928  c->first_packet = 0;
1929 
1930  for (i = 0; i < c->n_playlists; i++) {
1931  struct playlist *pls = c->playlists[i];
1932  /* Make sure we've got one buffered packet from each open playlist
1933  * stream */
1934  if (pls->needed && !pls->pkt.data) {
1935  while (1) {
1936  int64_t ts_diff;
1937  AVRational tb;
1938  ret = av_read_frame(pls->ctx, &pls->pkt);
1939  if (ret < 0) {
1940  if (!avio_feof(&pls->pb) && ret != AVERROR_EOF)
1941  return ret;
1942  reset_packet(&pls->pkt);
1943  break;
1944  } else {
1945  /* stream_index check prevents matching picture attachments etc. */
1946  if (pls->is_id3_timestamped && pls->pkt.stream_index == 0) {
1947  /* audio elementary streams are id3 timestamped */
1949  }
1950 
1951  if (c->first_timestamp == AV_NOPTS_VALUE &&
1952  pls->pkt.dts != AV_NOPTS_VALUE)
1953  c->first_timestamp = av_rescale_q(pls->pkt.dts,
1955  }
1956 
1957  if (pls->seek_timestamp == AV_NOPTS_VALUE)
1958  break;
1959 
1960  if (pls->seek_stream_index < 0 ||
1961  pls->seek_stream_index == pls->pkt.stream_index) {
1962 
1963  if (pls->pkt.dts == AV_NOPTS_VALUE) {
1965  break;
1966  }
1967 
1968  tb = get_timebase(pls);
1969  ts_diff = av_rescale_rnd(pls->pkt.dts, AV_TIME_BASE,
1970  tb.den, AV_ROUND_DOWN) -
1971  pls->seek_timestamp;
1972  if (ts_diff >= 0 && (pls->seek_flags & AVSEEK_FLAG_ANY ||
1973  pls->pkt.flags & AV_PKT_FLAG_KEY)) {
1975  break;
1976  }
1977  }
1978  av_packet_unref(&pls->pkt);
1979  reset_packet(&pls->pkt);
1980  }
1981  }
1982  /* Check if this stream has the packet with the lowest dts */
1983  if (pls->pkt.data) {
1984  struct playlist *minpls = minplaylist < 0 ?
1985  NULL : c->playlists[minplaylist];
1986  if (minplaylist < 0) {
1987  minplaylist = i;
1988  } else {
1989  int64_t dts = pls->pkt.dts;
1990  int64_t mindts = minpls->pkt.dts;
1991 
1992  if (dts == AV_NOPTS_VALUE ||
1993  (mindts != AV_NOPTS_VALUE && compare_ts_with_wrapdetect(dts, pls, mindts, minpls) < 0))
1994  minplaylist = i;
1995  }
1996  }
1997  }
1998 
1999  /* If we got a packet, return it */
2000  if (minplaylist >= 0) {
2001  struct playlist *pls = c->playlists[minplaylist];
2002  AVStream *ist;
2003  AVStream *st;
2004 
2005  ret = update_streams_from_subdemuxer(s, pls);
2006  if (ret < 0) {
2007  av_packet_unref(&pls->pkt);
2008  reset_packet(&pls->pkt);
2009  return ret;
2010  }
2011 
2012  /* check if noheader flag has been cleared by the subdemuxer */
2013  if (pls->has_noheader_flag && !(pls->ctx->ctx_flags & AVFMTCTX_NOHEADER)) {
2014  pls->has_noheader_flag = 0;
2016  }
2017 
2018  if (pls->pkt.stream_index >= pls->n_main_streams) {
2019  av_log(s, AV_LOG_ERROR, "stream index inconsistency: index %d, %d main streams, %d subdemuxer streams\n",
2020  pls->pkt.stream_index, pls->n_main_streams, pls->ctx->nb_streams);
2021  av_packet_unref(&pls->pkt);
2022  reset_packet(&pls->pkt);
2023  return AVERROR_BUG;
2024  }
2025 
2026  ist = pls->ctx->streams[pls->pkt.stream_index];
2027  st = pls->main_streams[pls->pkt.stream_index];
2028 
2029  *pkt = pls->pkt;
2030  pkt->stream_index = st->index;
2031  reset_packet(&c->playlists[minplaylist]->pkt);
2032 
2033  if (pkt->dts != AV_NOPTS_VALUE)
2034  c->cur_timestamp = av_rescale_q(pkt->dts,
2035  ist->time_base,
2036  AV_TIME_BASE_Q);
2037 
2038  /* There may be more situations where this would be useful, but this at least
2039  * handles newly probed codecs properly (i.e. request_probe by mpegts). */
2040  if (ist->codecpar->codec_id != st->codecpar->codec_id) {
2041  ret = set_stream_info_from_input_stream(st, pls, ist);
2042  if (ret < 0) {
2043  av_packet_unref(pkt);
2044  return ret;
2045  }
2046  }
2047 
2048  return 0;
2049  }
2050  return AVERROR_EOF;
2051 }
2052 
2053 static int hls_read_seek(AVFormatContext *s, int stream_index,
2054  int64_t timestamp, int flags)
2055 {
2056  HLSContext *c = s->priv_data;
2057  struct playlist *seek_pls = NULL;
2058  int i, seq_no;
2059  int j;
2060  int stream_subdemuxer_index;
2061  int64_t first_timestamp, seek_timestamp, duration;
2062 
2063  if ((flags & AVSEEK_FLAG_BYTE) ||
2064  !(c->variants[0]->playlists[0]->finished || c->variants[0]->playlists[0]->type == PLS_TYPE_EVENT))
2065  return AVERROR(ENOSYS);
2066 
2067  first_timestamp = c->first_timestamp == AV_NOPTS_VALUE ?
2068  0 : c->first_timestamp;
2069 
2070  seek_timestamp = av_rescale_rnd(timestamp, AV_TIME_BASE,
2071  s->streams[stream_index]->time_base.den,
2072  flags & AVSEEK_FLAG_BACKWARD ?
2074 
2075  duration = s->duration == AV_NOPTS_VALUE ?
2076  0 : s->duration;
2077 
2078  if (0 < duration && duration < seek_timestamp - first_timestamp)
2079  return AVERROR(EIO);
2080 
2081  /* find the playlist with the specified stream */
2082  for (i = 0; i < c->n_playlists; i++) {
2083  struct playlist *pls = c->playlists[i];
2084  for (j = 0; j < pls->n_main_streams; j++) {
2085  if (pls->main_streams[j] == s->streams[stream_index]) {
2086  seek_pls = pls;
2087  stream_subdemuxer_index = j;
2088  break;
2089  }
2090  }
2091  }
2092  /* check if the timestamp is valid for the playlist with the
2093  * specified stream index */
2094  if (!seek_pls || !find_timestamp_in_playlist(c, seek_pls, seek_timestamp, &seq_no))
2095  return AVERROR(EIO);
2096 
2097  /* set segment now so we do not need to search again below */
2098  seek_pls->cur_seq_no = seq_no;
2099  seek_pls->seek_stream_index = stream_subdemuxer_index;
2100 
2101  for (i = 0; i < c->n_playlists; i++) {
2102  /* Reset reading */
2103  struct playlist *pls = c->playlists[i];
2104  if (pls->input)
2105  ff_format_io_close(pls->parent, &pls->input);
2106  av_packet_unref(&pls->pkt);
2107  reset_packet(&pls->pkt);
2108  pls->pb.eof_reached = 0;
2109  /* Clear any buffered data */
2110  pls->pb.buf_end = pls->pb.buf_ptr = pls->pb.buffer;
2111  /* Reset the pos, to let the mpegts demuxer know we've seeked. */
2112  pls->pb.pos = 0;
2113  /* Flush the packet queue of the subdemuxer. */
2114  ff_read_frame_flush(pls->ctx);
2115 
2117  pls->seek_flags = flags;
2118 
2119  if (pls != seek_pls) {
2120  /* set closest segment seq_no for playlists not handled above */
2121  find_timestamp_in_playlist(c, pls, seek_timestamp, &pls->cur_seq_no);
2122  /* seek the playlist to the given position without taking
2123  * keyframes into account since this playlist does not have the
2124  * specified stream where we should look for the keyframes */
2125  pls->seek_stream_index = -1;
2126  pls->seek_flags |= AVSEEK_FLAG_ANY;
2127  }
2128  }
2129 
2131 
2132  return 0;
2133 }
2134 
2135 static int hls_probe(AVProbeData *p)
2136 {
2137  /* Require #EXTM3U at the start, and either one of the ones below
2138  * somewhere for a proper match. */
2139  if (strncmp(p->buf, "#EXTM3U", 7))
2140  return 0;
2141 
2142  if (strstr(p->buf, "#EXT-X-STREAM-INF:") ||
2143  strstr(p->buf, "#EXT-X-TARGETDURATION:") ||
2144  strstr(p->buf, "#EXT-X-MEDIA-SEQUENCE:"))
2145  return AVPROBE_SCORE_MAX;
2146  return 0;
2147 }
2148 
2149 #define OFFSET(x) offsetof(HLSContext, x)
2150 #define FLAGS AV_OPT_FLAG_DECODING_PARAM
2151 static const AVOption hls_options[] = {
2152  {"live_start_index", "segment index to start live streams at (negative values are from the end)",
2153  OFFSET(live_start_index), AV_OPT_TYPE_INT, {.i64 = -3}, INT_MIN, INT_MAX, FLAGS},
2154  {"allowed_extensions", "List of file extensions that hls is allowed to access",
2155  OFFSET(allowed_extensions), AV_OPT_TYPE_STRING,
2156  {.str = "3gp,aac,avi,flac,mkv,m3u8,m4a,m4s,m4v,mpg,mov,mp2,mp3,mp4,mpeg,mpegts,ogg,ogv,oga,ts,vob,wav"},
2157  INT_MIN, INT_MAX, FLAGS},
2158  {"max_reload", "Maximum number of times a insufficient list is attempted to be reloaded",
2159  OFFSET(max_reload), AV_OPT_TYPE_INT, {.i64 = 1000}, 0, INT_MAX, FLAGS},
2160  {NULL}
2161 };
2162 
2163 static const AVClass hls_class = {
2164  .class_name = "hls,applehttp",
2165  .item_name = av_default_item_name,
2166  .option = hls_options,
2167  .version = LIBAVUTIL_VERSION_INT,
2168 };
2169 
2171  .name = "hls,applehttp",
2172  .long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
2173  .priv_class = &hls_class,
2174  .priv_data_size = sizeof(HLSContext),
2175  .read_probe = hls_probe,
2178  .read_close = hls_close,
2180 };
#define FF_COMPLIANCE_EXPERIMENTAL
Allow nonstandardized experimental things.
Definition: avcodec.h:2986
#define AVSEEK_FLAG_BACKWARD
Definition: avformat.h:2423
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:1197
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:161
#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:334
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:453
int strict_std_compliance
Definition: hls.c:206
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1605
AVDictionary * id3_initial
Definition: hls.c:136
AVOption.
Definition: opt.h:246
ReadFromURLMode
Definition: dashdec.c:1270
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:318
static int set_stream_info_from_input_stream(AVStream *st, struct playlist *pls, AVStream *ist)
Definition: hls.c:1556
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:436
static int read_from_url(struct playlist *pls, struct segment *seg, uint8_t *buf, int buf_size, enum ReadFromURLMode mode)
Definition: hls.c:881
#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:86
unsigned char * buf_ptr
Current position in the buffer.
Definition: avio.h:228
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:229
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:4741
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:2425
char forced[4]
Definition: hls.c:456
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:460
static int64_t default_reload_interval(struct playlist *pls)
Definition: hls.c:1254
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:4152
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:890
int size
Definition: avcodec.h:1680
#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:244
#define AVIO_FLAG_READ
read-only
Definition: avio.h:660
char language[MAX_FIELD_LEN]
Definition: hls.c:452
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:1101
unsigned char * buffer
Start of the buffer.
Definition: avio.h:226
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:849
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:222
int av_usleep(unsigned usec)
Sleep for a period of time.
Definition: time.c:84
discard all
Definition: avcodec.h:830
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:538
#define MAX_CHARACTERISTICS_LEN
Definition: hls.c:44
int ctx_flags
Flags signalling stream properties.
Definition: avformat.h:1398
#define src
Definition: vp8dsp.c:254
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:1137
static void reset_packet(AVPacket *pkt)
Definition: hls.c:298
int strict_std_compliance
Allow non-standard and experimental extension.
Definition: avformat.h:1635
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:931
Format I/O context.
Definition: avformat.h:1349
#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:375
void ff_read_frame_flush(AVFormatContext *s)
Flush the frame reader.
Definition: utils.c:1861
#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:449
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:455
uint8_t
Round toward +infinity.
Definition: mathematics.h:83
int n_variants
Definition: hls.c:188
#define FLAGS
Definition: hls.c:2150
#define av_malloc(s)
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1302
AVOptions.
char group_id[MAX_FIELD_LEN]
Definition: hls.c:451
int64_t cur_seg_offset
Definition: hls.c:116
char audio[MAX_FIELD_LEN]
Definition: hls.c:324
static void free_rendition_list(HLSContext *c)
Definition: hls.c:285
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1697
int id
Format-specific stream ID.
Definition: avformat.h:896
uint8_t * read_buffer
Definition: hls.c:95
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5453
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:1001
static struct playlist * new_playlist(HLSContext *c, const char *url, const char *base)
Definition: hls.c:304
AVInputFormat ff_hls_demuxer
Definition: hls.c:2170
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4371
int finished
Definition: hls.c:108
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1417
int64_t duration
Definition: movenc.c:63
static void handle_id3(AVIOContext *pb, struct playlist *pls)
Definition: hls.c:960
int n_playlists
Definition: hls.c:190
AVFormatContext * avformat_alloc_context(void)
Allocate an AVFormatContext.
Definition: options.c:144
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:1460
uint8_t * data
Definition: avcodec.h:1679
AVProgram * av_new_program(AVFormatContext *s, int id)
Definition: utils.c:4470
static int read_data(void *opaque, uint8_t *buf, int buf_size)
Definition: hls.c:1261
static int flags
Definition: log.c:57
#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
int av_match_ext(const char *filename, const char *extensions)
Return a positive value if the given filename has one of the given extensions, 0 otherwise.
Definition: format.c:85
ptrdiff_t size
Definition: opengl_enc.c:101
struct rendition ** renditions
Definition: hls.c:150
static void add_metadata_from_renditions(AVFormatContext *s, struct playlist *pls, enum AVMediaType type)
Definition: hls.c:1401
#define av_log(a,...)
static void free_playlist_list(HLSContext *c)
Definition: hls.c:242
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:637
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:1711
struct variant ** variants
Definition: hls.c:189
static AVRational get_timebase(struct playlist *pls)
Definition: hls.c:1905
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:58
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:2279
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:1913
#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:1567
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:2163
AVIOInterruptCB * interrupt_callback
Definition: hls.c:200
char bandwidth[20]
Definition: hls.c:322
static void handle_key_args(struct key_info *info, const char *key, int key_len, char **dest, int *dest_len)
Definition: hls.c:379
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:179
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
char byterange[32]
Definition: hls.c:396
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:219
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:4148
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1121
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:1575
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:1433
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:1276
#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:109
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1685
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:469
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:848
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1405
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:871
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:261
#define dynarray_add(tab, nb_ptr, elem)
Definition: internal.h:202
char filename[1024]
input or output filename
Definition: avformat.h:1425
static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **opts)
Definition: hls.c:1520
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:254
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:557
#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
char * allowed_extensions
Definition: hls.c:207
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:1377
uint8_t * init_sec_buf
Definition: hls.c:121
static int hls_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: hls.c:1922
uint8_t * id3_buf
Definition: hls.c:134
Definition: hls.c:373
static struct segment * new_init_section(struct playlist *pls, struct init_section_info *info, const char *url_base)
Definition: hls.c:399
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:450
AVDictionary * metadata
Definition: avformat.h:961
static struct variant * new_variant(HLSContext *c, struct variant_info *info, const char *url, const char *base)
Definition: hls.c:329
#define AVFMT_FLAG_CUSTOM_IO
The caller has supplied a custom AVIOContext, don't avio_close() it.
Definition: avformat.h:1468
int ff_get_line(AVIOContext *s, char *buf, int maxlen)
Read a whole line of text from AVIOContext.
Definition: aviobuf.c:798
Usually treated as AVMEDIA_TYPE_DATA.
Definition: avutil.h:200
static void fill_timing_for_id3_timestamped_stream(struct playlist *pls)
Definition: hls.c:1880
struct segment ** segments
Definition: hls.c:113
#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:454
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:528
#define AV_DISPOSITION_VISUAL_IMPAIRED
stream for visual impaired audiences
Definition: avformat.h:850
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:592
Stream structure.
Definition: avformat.h:889
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:453
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:211
static void parse_id3(AVFormatContext *s, AVIOContext *pb, AVDictionary **metadata, int64_t *dts, ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta **extra_meta)
Definition: hls.c:905
#define AV_DISPOSITION_DEFAULT
Definition: avformat.h:836
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:237
char subtitles[MAX_FIELD_LEN]
Definition: hls.c:326
AVStreamInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1241
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:660
enum PlaylistType type
Definition: hls.c:109
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
char * user_agent
holds HTTP user agent set as an AVOption to the HTTP protocol context
Definition: hls.c:201
AVIOContext * pb
I/O context.
Definition: avformat.h:1391
static int parse_playlist(HLSContext *c, const char *url, struct playlist *pls, AVIOContext *in)
Definition: hls.c:667
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:618
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:2151
static int hls_read_header(AVFormatContext *s)
Definition: hls.c:1634
void * buf
Definition: avisynth_c.h:690
int max_reload
Definition: hls.c:208
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:1600
#define AV_WB32(p, v)
Definition: intreadwrite.h:424
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:1498
#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:572
#define AVSEEK_FLAG_BYTE
seeking based on position in bytes
Definition: avformat.h:2424
int need_context_update
Whether the internal avctx needs to be updated from codecpar (after a late change to codecpar) ...
Definition: internal.h:198
static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url, AVDictionary *opts, AVDictionary *opts2, int *is_http)
Definition: hls.c:600
char uri[MAX_URL_SIZE]
Definition: hls.c:450
AVMediaType
Definition: avutil.h:199
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:1530
#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:4306
#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:4713
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1713
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:355
const char * avio_find_protocol_name(const char *url)
Return the name of the protocol that will handle the passed URL.
Definition: avio.c:471
int size
Size of data in bytes.
Definition: buffer.h:93
AVDictionary * metadata
Definition: avformat.h:1282
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 recheck_discard_flags(AVFormatContext *s, int first)
Definition: hls.c:1840
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:4771
int64_t seek_timestamp
Definition: hls.c:141
char iv[35]
Definition: hls.c:376
#define OFFSET(x)
Definition: hls.c:2149
char characteristics[MAX_CHARACTERISTICS_LEN]
Definition: hls.c:457
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:374
if(ret< 0)
Definition: vf_mcdeint.c:279
#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:3497
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:950
int64_t pos
position in the file of the current buffer
Definition: avio.h:238
int pts_wrap_bits
number of bits in pts (used for wrapping control)
Definition: avformat.h:1055
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:4343
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:777
static int hls_probe(AVProbeData *p)
Definition: hls.c:2135
static int ensure_playlist(HLSContext *c, struct playlist **pls, const char *url)
Definition: hls.c:582
static int hls_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: hls.c:2053
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:751
#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:1109
char * value
Definition: dict.h:87
int eof_reached
true if eof reached
Definition: avio.h:240
int len
int ff_id3v2_tag_len(const uint8_t *buf)
Get the length of an ID3v2 tag.
Definition: id3v2.c:154
void * priv_data
Format private data.
Definition: avformat.h:1377
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:510
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:1678
char video[MAX_FIELD_LEN]
Definition: hls.c:325
int64_t duration
Duration of the stream, in AV_TIME_BASE fractional seconds.
Definition: avformat.h:1444
#define av_freep(p)
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:664
#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:395
AVCodecParameters * codecpar
Definition: avformat.h:1252
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:356
int start_seq_no
Definition: hls.c:111
int stream_index
Definition: avcodec.h:1681
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:926
static void free_init_section_list(struct playlist *pls)
Definition: hls.c:231
int64_t duration
Definition: hls.c:68
static void free_variant_list(HLSContext *c)
Definition: hls.c:273
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:952
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:1909
static int hls_close(AVFormatContext *s)
Definition: hls.c:1621
char * ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase)
Definition: utils.c:4692
This structure stores compressed data.
Definition: avcodec.h:1656
mode
Use these values in ebur128_init (or'ed).
Definition: ebur128.h:83
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:1672
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:979
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
#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:1459
static uint8_t tmp[11]
Definition: aes_ctr.c:26