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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
208 } HLSContext;
209 
210 static int read_chomp_line(AVIOContext *s, char *buf, int maxlen)
211 {
212  int len = ff_get_line(s, buf, maxlen);
213  while (len > 0 && av_isspace(buf[len - 1]))
214  buf[--len] = '\0';
215  return len;
216 }
217 
218 static void free_segment_list(struct playlist *pls)
219 {
220  int i;
221  for (i = 0; i < pls->n_segments; i++) {
222  av_freep(&pls->segments[i]->key);
223  av_freep(&pls->segments[i]->url);
224  av_freep(&pls->segments[i]);
225  }
226  av_freep(&pls->segments);
227  pls->n_segments = 0;
228 }
229 
230 static void free_init_section_list(struct playlist *pls)
231 {
232  int i;
233  for (i = 0; i < pls->n_init_sections; i++) {
234  av_freep(&pls->init_sections[i]->url);
235  av_freep(&pls->init_sections[i]);
236  }
237  av_freep(&pls->init_sections);
238  pls->n_init_sections = 0;
239 }
240 
242 {
243  int i;
244  for (i = 0; i < c->n_playlists; i++) {
245  struct playlist *pls = c->playlists[i];
246  free_segment_list(pls);
248  av_freep(&pls->main_streams);
249  av_freep(&pls->renditions);
250  av_freep(&pls->id3_buf);
251  av_dict_free(&pls->id3_initial);
253  av_freep(&pls->init_sec_buf);
254  av_packet_unref(&pls->pkt);
255  av_freep(&pls->pb.buffer);
256  if (pls->input)
257  ff_format_io_close(c->ctx, &pls->input);
258  if (pls->ctx) {
259  pls->ctx->pb = NULL;
260  avformat_close_input(&pls->ctx);
261  }
262  av_free(pls);
263  }
264  av_freep(&c->playlists);
265  av_freep(&c->cookies);
266  av_freep(&c->user_agent);
267  av_freep(&c->headers);
268  av_freep(&c->http_proxy);
269  c->n_playlists = 0;
270 }
271 
273 {
274  int i;
275  for (i = 0; i < c->n_variants; i++) {
276  struct variant *var = c->variants[i];
277  av_freep(&var->playlists);
278  av_free(var);
279  }
280  av_freep(&c->variants);
281  c->n_variants = 0;
282 }
283 
285 {
286  int i;
287  for (i = 0; i < c->n_renditions; i++)
288  av_freep(&c->renditions[i]);
289  av_freep(&c->renditions);
290  c->n_renditions = 0;
291 }
292 
293 /*
294  * Used to reset a statically allocated AVPacket to a clean slate,
295  * containing no data.
296  */
297 static void reset_packet(AVPacket *pkt)
298 {
299  av_init_packet(pkt);
300  pkt->data = NULL;
301 }
302 
303 static struct playlist *new_playlist(HLSContext *c, const char *url,
304  const char *base)
305 {
306  struct playlist *pls = av_mallocz(sizeof(struct playlist));
307  if (!pls)
308  return NULL;
309  reset_packet(&pls->pkt);
310  ff_make_absolute_url(pls->url, sizeof(pls->url), base, url);
312 
313  pls->is_id3_timestamped = -1;
315 
316  dynarray_add(&c->playlists, &c->n_playlists, pls);
317  return pls;
318 }
319 
320 struct variant_info {
321  char bandwidth[20];
322  /* variant group ids: */
326 };
327 
328 static struct variant *new_variant(HLSContext *c, struct variant_info *info,
329  const char *url, const char *base)
330 {
331  struct variant *var;
332  struct playlist *pls;
333 
334  pls = new_playlist(c, url, base);
335  if (!pls)
336  return NULL;
337 
338  var = av_mallocz(sizeof(struct variant));
339  if (!var)
340  return NULL;
341 
342  if (info) {
343  var->bandwidth = atoi(info->bandwidth);
344  strcpy(var->audio_group, info->audio);
345  strcpy(var->video_group, info->video);
346  strcpy(var->subtitles_group, info->subtitles);
347  }
348 
349  dynarray_add(&c->variants, &c->n_variants, var);
350  dynarray_add(&var->playlists, &var->n_playlists, pls);
351  return var;
352 }
353 
354 static void handle_variant_args(struct variant_info *info, const char *key,
355  int key_len, char **dest, int *dest_len)
356 {
357  if (!strncmp(key, "BANDWIDTH=", key_len)) {
358  *dest = info->bandwidth;
359  *dest_len = sizeof(info->bandwidth);
360  } else if (!strncmp(key, "AUDIO=", key_len)) {
361  *dest = info->audio;
362  *dest_len = sizeof(info->audio);
363  } else if (!strncmp(key, "VIDEO=", key_len)) {
364  *dest = info->video;
365  *dest_len = sizeof(info->video);
366  } else if (!strncmp(key, "SUBTITLES=", key_len)) {
367  *dest = info->subtitles;
368  *dest_len = sizeof(info->subtitles);
369  }
370 }
371 
372 struct key_info {
374  char method[11];
375  char iv[35];
376 };
377 
378 static void handle_key_args(struct key_info *info, const char *key,
379  int key_len, char **dest, int *dest_len)
380 {
381  if (!strncmp(key, "METHOD=", key_len)) {
382  *dest = info->method;
383  *dest_len = sizeof(info->method);
384  } else if (!strncmp(key, "URI=", key_len)) {
385  *dest = info->uri;
386  *dest_len = sizeof(info->uri);
387  } else if (!strncmp(key, "IV=", key_len)) {
388  *dest = info->iv;
389  *dest_len = sizeof(info->iv);
390  }
391 }
392 
395  char byterange[32];
396 };
397 
398 static struct segment *new_init_section(struct playlist *pls,
399  struct init_section_info *info,
400  const char *url_base)
401 {
402  struct segment *sec;
403  char *ptr;
404  char tmp_str[MAX_URL_SIZE];
405 
406  if (!info->uri[0])
407  return NULL;
408 
409  sec = av_mallocz(sizeof(*sec));
410  if (!sec)
411  return NULL;
412 
413  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url_base, info->uri);
414  sec->url = av_strdup(tmp_str);
415  if (!sec->url) {
416  av_free(sec);
417  return NULL;
418  }
419 
420  if (info->byterange[0]) {
421  sec->size = strtoll(info->byterange, NULL, 10);
422  ptr = strchr(info->byterange, '@');
423  if (ptr)
424  sec->url_offset = strtoll(ptr+1, NULL, 10);
425  } else {
426  /* the entire file is the init section */
427  sec->size = -1;
428  }
429 
430  dynarray_add(&pls->init_sections, &pls->n_init_sections, sec);
431 
432  return sec;
433 }
434 
435 static void handle_init_section_args(struct init_section_info *info, const char *key,
436  int key_len, char **dest, int *dest_len)
437 {
438  if (!strncmp(key, "URI=", key_len)) {
439  *dest = info->uri;
440  *dest_len = sizeof(info->uri);
441  } else if (!strncmp(key, "BYTERANGE=", key_len)) {
442  *dest = info->byterange;
443  *dest_len = sizeof(info->byterange);
444  }
445 }
446 
448  char type[16];
454  char defaultr[4];
455  char forced[4];
457 };
458 
459 static struct rendition *new_rendition(HLSContext *c, struct rendition_info *info,
460  const char *url_base)
461 {
462  struct rendition *rend;
464  char *characteristic;
465  char *chr_ptr;
466  char *saveptr;
467 
468  if (!strcmp(info->type, "AUDIO"))
469  type = AVMEDIA_TYPE_AUDIO;
470  else if (!strcmp(info->type, "VIDEO"))
471  type = AVMEDIA_TYPE_VIDEO;
472  else if (!strcmp(info->type, "SUBTITLES"))
473  type = AVMEDIA_TYPE_SUBTITLE;
474  else if (!strcmp(info->type, "CLOSED-CAPTIONS"))
475  /* CLOSED-CAPTIONS is ignored since we do not support CEA-608 CC in
476  * AVC SEI RBSP anyway */
477  return NULL;
478 
479  if (type == AVMEDIA_TYPE_UNKNOWN)
480  return NULL;
481 
482  /* URI is mandatory for subtitles as per spec */
483  if (type == AVMEDIA_TYPE_SUBTITLE && !info->uri[0])
484  return NULL;
485 
486  /* TODO: handle subtitles (each segment has to parsed separately) */
488  if (type == AVMEDIA_TYPE_SUBTITLE)
489  return NULL;
490 
491  rend = av_mallocz(sizeof(struct rendition));
492  if (!rend)
493  return NULL;
494 
495  dynarray_add(&c->renditions, &c->n_renditions, rend);
496 
497  rend->type = type;
498  strcpy(rend->group_id, info->group_id);
499  strcpy(rend->language, info->language);
500  strcpy(rend->name, info->name);
501 
502  /* add the playlist if this is an external rendition */
503  if (info->uri[0]) {
504  rend->playlist = new_playlist(c, info->uri, url_base);
505  if (rend->playlist)
507  &rend->playlist->n_renditions, rend);
508  }
509 
510  if (info->assoc_language[0]) {
511  int langlen = strlen(rend->language);
512  if (langlen < sizeof(rend->language) - 3) {
513  rend->language[langlen] = ',';
514  strncpy(rend->language + langlen + 1, info->assoc_language,
515  sizeof(rend->language) - langlen - 2);
516  }
517  }
518 
519  if (!strcmp(info->defaultr, "YES"))
521  if (!strcmp(info->forced, "YES"))
523 
524  chr_ptr = info->characteristics;
525  while ((characteristic = av_strtok(chr_ptr, ",", &saveptr))) {
526  if (!strcmp(characteristic, "public.accessibility.describes-music-and-sound"))
528  else if (!strcmp(characteristic, "public.accessibility.describes-video"))
530 
531  chr_ptr = NULL;
532  }
533 
534  return rend;
535 }
536 
537 static void handle_rendition_args(struct rendition_info *info, const char *key,
538  int key_len, char **dest, int *dest_len)
539 {
540  if (!strncmp(key, "TYPE=", key_len)) {
541  *dest = info->type;
542  *dest_len = sizeof(info->type);
543  } else if (!strncmp(key, "URI=", key_len)) {
544  *dest = info->uri;
545  *dest_len = sizeof(info->uri);
546  } else if (!strncmp(key, "GROUP-ID=", key_len)) {
547  *dest = info->group_id;
548  *dest_len = sizeof(info->group_id);
549  } else if (!strncmp(key, "LANGUAGE=", key_len)) {
550  *dest = info->language;
551  *dest_len = sizeof(info->language);
552  } else if (!strncmp(key, "ASSOC-LANGUAGE=", key_len)) {
553  *dest = info->assoc_language;
554  *dest_len = sizeof(info->assoc_language);
555  } else if (!strncmp(key, "NAME=", key_len)) {
556  *dest = info->name;
557  *dest_len = sizeof(info->name);
558  } else if (!strncmp(key, "DEFAULT=", key_len)) {
559  *dest = info->defaultr;
560  *dest_len = sizeof(info->defaultr);
561  } else if (!strncmp(key, "FORCED=", key_len)) {
562  *dest = info->forced;
563  *dest_len = sizeof(info->forced);
564  } else if (!strncmp(key, "CHARACTERISTICS=", key_len)) {
565  *dest = info->characteristics;
566  *dest_len = sizeof(info->characteristics);
567  }
568  /*
569  * ignored:
570  * - AUTOSELECT: client may autoselect based on e.g. system language
571  * - INSTREAM-ID: EIA-608 closed caption number ("CC1".."CC4")
572  */
573 }
574 
575 /* used by parse_playlist to allocate a new variant+playlist when the
576  * playlist is detected to be a Media Playlist (not Master Playlist)
577  * and we have no parent Master Playlist (parsing of which would have
578  * allocated the variant and playlist already)
579  * *pls == NULL => Master Playlist or parentless Media Playlist
580  * *pls != NULL => parented Media Playlist, playlist+variant allocated */
581 static int ensure_playlist(HLSContext *c, struct playlist **pls, const char *url)
582 {
583  if (*pls)
584  return 0;
585  if (!new_variant(c, NULL, url, NULL))
586  return AVERROR(ENOMEM);
587  *pls = c->playlists[c->n_playlists - 1];
588  return 0;
589 }
590 
591 static void update_options(char **dest, const char *name, void *src)
592 {
593  av_freep(dest);
594  av_opt_get(src, name, AV_OPT_SEARCH_CHILDREN, (uint8_t**)dest);
595  if (*dest && !strlen(*dest))
596  av_freep(dest);
597 }
598 
599 static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url,
600  AVDictionary *opts, AVDictionary *opts2, int *is_http)
601 {
602  HLSContext *c = s->priv_data;
603  AVDictionary *tmp = NULL;
604  const char *proto_name = NULL;
605  int ret;
606 
607  av_dict_copy(&tmp, opts, 0);
608  av_dict_copy(&tmp, opts2, 0);
609 
610  if (av_strstart(url, "crypto", NULL)) {
611  if (url[6] == '+' || url[6] == ':')
612  proto_name = avio_find_protocol_name(url + 7);
613  }
614 
615  if (!proto_name)
616  proto_name = avio_find_protocol_name(url);
617 
618  if (!proto_name)
619  return AVERROR_INVALIDDATA;
620 
621  // only http(s) & file are allowed
622  if (av_strstart(proto_name, "file", NULL)) {
623  if (strcmp(c->allowed_extensions, "ALL") && !av_match_ext(url, c->allowed_extensions)) {
624  av_log(s, AV_LOG_ERROR,
625  "Filename extension of \'%s\' is not a common multimedia extension, blocked for security reasons.\n"
626  "If you wish to override this adjust allowed_extensions, you can set it to \'ALL\' to allow all\n",
627  url);
628  return AVERROR_INVALIDDATA;
629  }
630  } else if (av_strstart(proto_name, "http", NULL)) {
631  ;
632  } else
633  return AVERROR_INVALIDDATA;
634 
635  if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':')
636  ;
637  else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':')
638  ;
639  else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))
640  return AVERROR_INVALIDDATA;
641 
642  ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
643  if (ret >= 0) {
644  // update cookies on http response with setcookies.
645  char *new_cookies = NULL;
646 
647  if (!(s->flags & AVFMT_FLAG_CUSTOM_IO))
648  av_opt_get(*pb, "cookies", AV_OPT_SEARCH_CHILDREN, (uint8_t**)&new_cookies);
649 
650  if (new_cookies) {
651  av_free(c->cookies);
652  c->cookies = new_cookies;
653  }
654 
655  av_dict_set(&opts, "cookies", c->cookies, 0);
656  }
657 
658  av_dict_free(&tmp);
659 
660  if (is_http)
661  *is_http = av_strstart(proto_name, "http", NULL);
662 
663  return ret;
664 }
665 
666 static int parse_playlist(HLSContext *c, const char *url,
667  struct playlist *pls, AVIOContext *in)
668 {
669  int ret = 0, is_segment = 0, is_variant = 0;
670  int64_t duration = 0;
671  enum KeyType key_type = KEY_NONE;
672  uint8_t iv[16] = "";
673  int has_iv = 0;
674  char key[MAX_URL_SIZE] = "";
675  char line[MAX_URL_SIZE];
676  const char *ptr;
677  int close_in = 0;
678  int64_t seg_offset = 0;
679  int64_t seg_size = -1;
680  uint8_t *new_url = NULL;
681  struct variant_info variant_info;
682  char tmp_str[MAX_URL_SIZE];
683  struct segment *cur_init_section = NULL;
684 
685  if (!in) {
686 #if 1
688  close_in = 1;
689  /* Some HLS servers don't like being sent the range header */
690  av_dict_set(&opts, "seekable", "0", 0);
691 
692  // broker prior HTTP options that should be consistent across requests
693  av_dict_set(&opts, "user_agent", c->user_agent, 0);
694  av_dict_set(&opts, "cookies", c->cookies, 0);
695  av_dict_set(&opts, "headers", c->headers, 0);
696  av_dict_set(&opts, "http_proxy", c->http_proxy, 0);
697 
698  ret = c->ctx->io_open(c->ctx, &in, url, AVIO_FLAG_READ, &opts);
699  av_dict_free(&opts);
700  if (ret < 0)
701  return ret;
702 #else
703  ret = open_in(c, &in, url);
704  if (ret < 0)
705  return ret;
706  close_in = 1;
707 #endif
708  }
709 
710  if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >= 0)
711  url = new_url;
712 
713  read_chomp_line(in, line, sizeof(line));
714  if (strcmp(line, "#EXTM3U")) {
715  ret = AVERROR_INVALIDDATA;
716  goto fail;
717  }
718 
719  if (pls) {
720  free_segment_list(pls);
721  pls->finished = 0;
722  pls->type = PLS_TYPE_UNSPECIFIED;
723  }
724  while (!avio_feof(in)) {
725  read_chomp_line(in, line, sizeof(line));
726  if (av_strstart(line, "#EXT-X-STREAM-INF:", &ptr)) {
727  is_variant = 1;
728  memset(&variant_info, 0, sizeof(variant_info));
730  &variant_info);
731  } else if (av_strstart(line, "#EXT-X-KEY:", &ptr)) {
732  struct key_info info = {{0}};
734  &info);
735  key_type = KEY_NONE;
736  has_iv = 0;
737  if (!strcmp(info.method, "AES-128"))
738  key_type = KEY_AES_128;
739  if (!strcmp(info.method, "SAMPLE-AES"))
740  key_type = KEY_SAMPLE_AES;
741  if (!strncmp(info.iv, "0x", 2) || !strncmp(info.iv, "0X", 2)) {
742  ff_hex_to_data(iv, info.iv + 2);
743  has_iv = 1;
744  }
745  av_strlcpy(key, info.uri, sizeof(key));
746  } else if (av_strstart(line, "#EXT-X-MEDIA:", &ptr)) {
747  struct rendition_info info = {{0}};
749  &info);
750  new_rendition(c, &info, url);
751  } else if (av_strstart(line, "#EXT-X-TARGETDURATION:", &ptr)) {
752  ret = ensure_playlist(c, &pls, url);
753  if (ret < 0)
754  goto fail;
755  pls->target_duration = strtoll(ptr, NULL, 10) * AV_TIME_BASE;
756  } else if (av_strstart(line, "#EXT-X-MEDIA-SEQUENCE:", &ptr)) {
757  ret = ensure_playlist(c, &pls, url);
758  if (ret < 0)
759  goto fail;
760  pls->start_seq_no = atoi(ptr);
761  } else if (av_strstart(line, "#EXT-X-PLAYLIST-TYPE:", &ptr)) {
762  ret = ensure_playlist(c, &pls, url);
763  if (ret < 0)
764  goto fail;
765  if (!strcmp(ptr, "EVENT"))
766  pls->type = PLS_TYPE_EVENT;
767  else if (!strcmp(ptr, "VOD"))
768  pls->type = PLS_TYPE_VOD;
769  } else if (av_strstart(line, "#EXT-X-MAP:", &ptr)) {
770  struct init_section_info info = {{0}};
771  ret = ensure_playlist(c, &pls, url);
772  if (ret < 0)
773  goto fail;
775  &info);
776  cur_init_section = new_init_section(pls, &info, url);
777  } else if (av_strstart(line, "#EXT-X-ENDLIST", &ptr)) {
778  if (pls)
779  pls->finished = 1;
780  } else if (av_strstart(line, "#EXTINF:", &ptr)) {
781  is_segment = 1;
782  duration = atof(ptr) * AV_TIME_BASE;
783  } else if (av_strstart(line, "#EXT-X-BYTERANGE:", &ptr)) {
784  seg_size = strtoll(ptr, NULL, 10);
785  ptr = strchr(ptr, '@');
786  if (ptr)
787  seg_offset = strtoll(ptr+1, NULL, 10);
788  } else if (av_strstart(line, "#", NULL)) {
789  continue;
790  } else if (line[0]) {
791  if (is_variant) {
792  if (!new_variant(c, &variant_info, line, url)) {
793  ret = AVERROR(ENOMEM);
794  goto fail;
795  }
796  is_variant = 0;
797  }
798  if (is_segment) {
799  struct segment *seg;
800  if (!pls) {
801  if (!new_variant(c, 0, url, NULL)) {
802  ret = AVERROR(ENOMEM);
803  goto fail;
804  }
805  pls = c->playlists[c->n_playlists - 1];
806  }
807  seg = av_malloc(sizeof(struct segment));
808  if (!seg) {
809  ret = AVERROR(ENOMEM);
810  goto fail;
811  }
812  seg->duration = duration;
813  seg->key_type = key_type;
814  if (has_iv) {
815  memcpy(seg->iv, iv, sizeof(iv));
816  } else {
817  int seq = pls->start_seq_no + pls->n_segments;
818  memset(seg->iv, 0, sizeof(seg->iv));
819  AV_WB32(seg->iv + 12, seq);
820  }
821 
822  if (key_type != KEY_NONE) {
823  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, key);
824  seg->key = av_strdup(tmp_str);
825  if (!seg->key) {
826  av_free(seg);
827  ret = AVERROR(ENOMEM);
828  goto fail;
829  }
830  } else {
831  seg->key = NULL;
832  }
833 
834  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, line);
835  seg->url = av_strdup(tmp_str);
836  if (!seg->url) {
837  av_free(seg->key);
838  av_free(seg);
839  ret = AVERROR(ENOMEM);
840  goto fail;
841  }
842 
843  dynarray_add(&pls->segments, &pls->n_segments, seg);
844  is_segment = 0;
845 
846  seg->size = seg_size;
847  if (seg_size >= 0) {
848  seg->url_offset = seg_offset;
849  seg_offset += seg_size;
850  seg_size = -1;
851  } else {
852  seg->url_offset = 0;
853  seg_offset = 0;
854  }
855 
856  seg->init_section = cur_init_section;
857  }
858  }
859  }
860  if (pls)
862 
863 fail:
864  av_free(new_url);
865  if (close_in)
866  ff_format_io_close(c->ctx, &in);
867  return ret;
868 }
869 
870 static struct segment *current_segment(struct playlist *pls)
871 {
872  return pls->segments[pls->cur_seq_no - pls->start_seq_no];
873 }
874 
878 };
879 
880 static int read_from_url(struct playlist *pls, struct segment *seg,
881  uint8_t *buf, int buf_size,
882  enum ReadFromURLMode mode)
883 {
884  int ret;
885 
886  /* limit read if the segment was only a part of a file */
887  if (seg->size >= 0)
888  buf_size = FFMIN(buf_size, seg->size - pls->cur_seg_offset);
889 
890  if (mode == READ_COMPLETE) {
891  ret = avio_read(pls->input, buf, buf_size);
892  if (ret != buf_size)
893  av_log(NULL, AV_LOG_ERROR, "Could not read complete segment.\n");
894  } else
895  ret = avio_read(pls->input, buf, buf_size);
896 
897  if (ret > 0)
898  pls->cur_seg_offset += ret;
899 
900  return ret;
901 }
902 
903 /* Parse the raw ID3 data and pass contents to caller */
905  AVDictionary **metadata, int64_t *dts,
906  ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta **extra_meta)
907 {
908  static const char id3_priv_owner_ts[] = "com.apple.streaming.transportStreamTimestamp";
909  ID3v2ExtraMeta *meta;
910 
911  ff_id3v2_read_dict(pb, metadata, ID3v2_DEFAULT_MAGIC, extra_meta);
912  for (meta = *extra_meta; meta; meta = meta->next) {
913  if (!strcmp(meta->tag, "PRIV")) {
914  ID3v2ExtraMetaPRIV *priv = meta->data;
915  if (priv->datasize == 8 && !strcmp(priv->owner, id3_priv_owner_ts)) {
916  /* 33-bit MPEG timestamp */
917  int64_t ts = AV_RB64(priv->data);
918  av_log(s, AV_LOG_DEBUG, "HLS ID3 audio timestamp %"PRId64"\n", ts);
919  if ((ts & ~((1ULL << 33) - 1)) == 0)
920  *dts = ts;
921  else
922  av_log(s, AV_LOG_ERROR, "Invalid HLS ID3 audio timestamp %"PRId64"\n", ts);
923  }
924  } else if (!strcmp(meta->tag, "APIC") && apic)
925  *apic = meta->data;
926  }
927 }
928 
929 /* Check if the ID3 metadata contents have changed */
930 static int id3_has_changed_values(struct playlist *pls, AVDictionary *metadata,
931  ID3v2ExtraMetaAPIC *apic)
932 {
933  AVDictionaryEntry *entry = NULL;
934  AVDictionaryEntry *oldentry;
935  /* check that no keys have changed values */
936  while ((entry = av_dict_get(metadata, "", entry, AV_DICT_IGNORE_SUFFIX))) {
937  oldentry = av_dict_get(pls->id3_initial, entry->key, NULL, AV_DICT_MATCH_CASE);
938  if (!oldentry || strcmp(oldentry->value, entry->value) != 0)
939  return 1;
940  }
941 
942  /* check if apic appeared */
943  if (apic && (pls->ctx->nb_streams != 2 || !pls->ctx->streams[1]->attached_pic.data))
944  return 1;
945 
946  if (apic) {
947  int size = pls->ctx->streams[1]->attached_pic.size;
948  if (size != apic->buf->size - AV_INPUT_BUFFER_PADDING_SIZE)
949  return 1;
950 
951  if (memcmp(apic->buf->data, pls->ctx->streams[1]->attached_pic.data, size) != 0)
952  return 1;
953  }
954 
955  return 0;
956 }
957 
958 /* Parse ID3 data and handle the found data */
959 static void handle_id3(AVIOContext *pb, struct playlist *pls)
960 {
961  AVDictionary *metadata = NULL;
962  ID3v2ExtraMetaAPIC *apic = NULL;
963  ID3v2ExtraMeta *extra_meta = NULL;
964  int64_t timestamp = AV_NOPTS_VALUE;
965 
966  parse_id3(pls->ctx, pb, &metadata, &timestamp, &apic, &extra_meta);
967 
968  if (timestamp != AV_NOPTS_VALUE) {
969  pls->id3_mpegts_timestamp = timestamp;
970  pls->id3_offset = 0;
971  }
972 
973  if (!pls->id3_found) {
974  /* initial ID3 tags */
976  pls->id3_found = 1;
977 
978  /* get picture attachment and set text metadata */
979  if (pls->ctx->nb_streams)
980  ff_id3v2_parse_apic(pls->ctx, &extra_meta);
981  else
982  /* demuxer not yet opened, defer picture attachment */
983  pls->id3_deferred_extra = extra_meta;
984 
985  av_dict_copy(&pls->ctx->metadata, metadata, 0);
986  pls->id3_initial = metadata;
987 
988  } else {
989  if (!pls->id3_changed && id3_has_changed_values(pls, metadata, apic)) {
990  avpriv_report_missing_feature(pls->ctx, "Changing ID3 metadata in HLS audio elementary stream");
991  pls->id3_changed = 1;
992  }
993  av_dict_free(&metadata);
994  }
995 
996  if (!pls->id3_deferred_extra)
997  ff_id3v2_free_extra_meta(&extra_meta);
998 }
999 
1000 static void intercept_id3(struct playlist *pls, uint8_t *buf,
1001  int buf_size, int *len)
1002 {
1003  /* intercept id3 tags, we do not want to pass them to the raw
1004  * demuxer on all segment switches */
1005  int bytes;
1006  int id3_buf_pos = 0;
1007  int fill_buf = 0;
1008  struct segment *seg = current_segment(pls);
1009 
1010  /* gather all the id3 tags */
1011  while (1) {
1012  /* see if we can retrieve enough data for ID3 header */
1013  if (*len < ID3v2_HEADER_SIZE && buf_size >= ID3v2_HEADER_SIZE) {
1014  bytes = read_from_url(pls, seg, buf + *len, ID3v2_HEADER_SIZE - *len, READ_COMPLETE);
1015  if (bytes > 0) {
1016 
1017  if (bytes == ID3v2_HEADER_SIZE - *len)
1018  /* no EOF yet, so fill the caller buffer again after
1019  * we have stripped the ID3 tags */
1020  fill_buf = 1;
1021 
1022  *len += bytes;
1023 
1024  } else if (*len <= 0) {
1025  /* error/EOF */
1026  *len = bytes;
1027  fill_buf = 0;
1028  }
1029  }
1030 
1031  if (*len < ID3v2_HEADER_SIZE)
1032  break;
1033 
1034  if (ff_id3v2_match(buf, ID3v2_DEFAULT_MAGIC)) {
1035  int64_t maxsize = seg->size >= 0 ? seg->size : 1024*1024;
1036  int taglen = ff_id3v2_tag_len(buf);
1037  int tag_got_bytes = FFMIN(taglen, *len);
1038  int remaining = taglen - tag_got_bytes;
1039 
1040  if (taglen > maxsize) {
1041  av_log(pls->ctx, AV_LOG_ERROR, "Too large HLS ID3 tag (%d > %"PRId64" bytes)\n",
1042  taglen, maxsize);
1043  break;
1044  }
1045 
1046  /*
1047  * Copy the id3 tag to our temporary id3 buffer.
1048  * We could read a small id3 tag directly without memcpy, but
1049  * we would still need to copy the large tags, and handling
1050  * both of those cases together with the possibility for multiple
1051  * tags would make the handling a bit complex.
1052  */
1053  pls->id3_buf = av_fast_realloc(pls->id3_buf, &pls->id3_buf_size, id3_buf_pos + taglen);
1054  if (!pls->id3_buf)
1055  break;
1056  memcpy(pls->id3_buf + id3_buf_pos, buf, tag_got_bytes);
1057  id3_buf_pos += tag_got_bytes;
1058 
1059  /* strip the intercepted bytes */
1060  *len -= tag_got_bytes;
1061  memmove(buf, buf + tag_got_bytes, *len);
1062  av_log(pls->ctx, AV_LOG_DEBUG, "Stripped %d HLS ID3 bytes\n", tag_got_bytes);
1063 
1064  if (remaining > 0) {
1065  /* read the rest of the tag in */
1066  if (read_from_url(pls, seg, pls->id3_buf + id3_buf_pos, remaining, READ_COMPLETE) != remaining)
1067  break;
1068  id3_buf_pos += remaining;
1069  av_log(pls->ctx, AV_LOG_DEBUG, "Stripped additional %d HLS ID3 bytes\n", remaining);
1070  }
1071 
1072  } else {
1073  /* no more ID3 tags */
1074  break;
1075  }
1076  }
1077 
1078  /* re-fill buffer for the caller unless EOF */
1079  if (*len >= 0 && (fill_buf || *len == 0)) {
1080  bytes = read_from_url(pls, seg, buf + *len, buf_size - *len, READ_NORMAL);
1081 
1082  /* ignore error if we already had some data */
1083  if (bytes >= 0)
1084  *len += bytes;
1085  else if (*len == 0)
1086  *len = bytes;
1087  }
1088 
1089  if (pls->id3_buf) {
1090  /* Now parse all the ID3 tags */
1091  AVIOContext id3ioctx;
1092  ffio_init_context(&id3ioctx, pls->id3_buf, id3_buf_pos, 0, NULL, NULL, NULL, NULL);
1093  handle_id3(&id3ioctx, pls);
1094  }
1095 
1096  if (pls->is_id3_timestamped == -1)
1098 }
1099 
1100 static int open_input(HLSContext *c, struct playlist *pls, struct segment *seg)
1101 {
1102  AVDictionary *opts = NULL;
1103  int ret;
1104  int is_http = 0;
1105 
1106  // broker prior HTTP options that should be consistent across requests
1107  av_dict_set(&opts, "user_agent", c->user_agent, 0);
1108  av_dict_set(&opts, "cookies", c->cookies, 0);
1109  av_dict_set(&opts, "headers", c->headers, 0);
1110  av_dict_set(&opts, "http_proxy", c->http_proxy, 0);
1111  av_dict_set(&opts, "seekable", "0", 0);
1112 
1113  if (seg->size >= 0) {
1114  /* try to restrict the HTTP request to the part we want
1115  * (if this is in fact a HTTP request) */
1116  av_dict_set_int(&opts, "offset", seg->url_offset, 0);
1117  av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
1118  }
1119 
1120  av_log(pls->parent, AV_LOG_VERBOSE, "HLS request for url '%s', offset %"PRId64", playlist %d\n",
1121  seg->url, seg->url_offset, pls->index);
1122 
1123  if (seg->key_type == KEY_NONE) {
1124  ret = open_url(pls->parent, &pls->input, seg->url, c->avio_opts, opts, &is_http);
1125  } else if (seg->key_type == KEY_AES_128) {
1126  AVDictionary *opts2 = NULL;
1127  char iv[33], key[33], url[MAX_URL_SIZE];
1128  if (strcmp(seg->key, pls->key_url)) {
1129  AVIOContext *pb;
1130  if (open_url(pls->parent, &pb, seg->key, c->avio_opts, opts, NULL) == 0) {
1131  ret = avio_read(pb, pls->key, sizeof(pls->key));
1132  if (ret != sizeof(pls->key)) {
1133  av_log(NULL, AV_LOG_ERROR, "Unable to read key file %s\n",
1134  seg->key);
1135  }
1136  ff_format_io_close(pls->parent, &pb);
1137  } else {
1138  av_log(NULL, AV_LOG_ERROR, "Unable to open key file %s\n",
1139  seg->key);
1140  }
1141  av_strlcpy(pls->key_url, seg->key, sizeof(pls->key_url));
1142  }
1143  ff_data_to_hex(iv, seg->iv, sizeof(seg->iv), 0);
1144  ff_data_to_hex(key, pls->key, sizeof(pls->key), 0);
1145  iv[32] = key[32] = '\0';
1146  if (strstr(seg->url, "://"))
1147  snprintf(url, sizeof(url), "crypto+%s", seg->url);
1148  else
1149  snprintf(url, sizeof(url), "crypto:%s", seg->url);
1150 
1151  av_dict_copy(&opts2, c->avio_opts, 0);
1152  av_dict_set(&opts2, "key", key, 0);
1153  av_dict_set(&opts2, "iv", iv, 0);
1154 
1155  ret = open_url(pls->parent, &pls->input, url, opts2, opts, &is_http);
1156 
1157  av_dict_free(&opts2);
1158 
1159  if (ret < 0) {
1160  goto cleanup;
1161  }
1162  ret = 0;
1163  } else if (seg->key_type == KEY_SAMPLE_AES) {
1164  av_log(pls->parent, AV_LOG_ERROR,
1165  "SAMPLE-AES encryption is not supported yet\n");
1166  ret = AVERROR_PATCHWELCOME;
1167  }
1168  else
1169  ret = AVERROR(ENOSYS);
1170 
1171  /* Seek to the requested position. If this was a HTTP request, the offset
1172  * should already be where want it to, but this allows e.g. local testing
1173  * without a HTTP server.
1174  *
1175  * This is not done for HTTP at all as avio_seek() does internal bookkeeping
1176  * of file offset which is out-of-sync with the actual offset when "offset"
1177  * AVOption is used with http protocol, causing the seek to not be a no-op
1178  * as would be expected. Wrong offset received from the server will not be
1179  * noticed without the call, though.
1180  */
1181  if (ret == 0 && !is_http && seg->key_type == KEY_NONE && seg->url_offset) {
1182  int64_t seekret = avio_seek(pls->input, seg->url_offset, SEEK_SET);
1183  if (seekret < 0) {
1184  av_log(pls->parent, AV_LOG_ERROR, "Unable to seek to offset %"PRId64" of HLS segment '%s'\n", seg->url_offset, seg->url);
1185  ret = seekret;
1186  ff_format_io_close(pls->parent, &pls->input);
1187  }
1188  }
1189 
1190 cleanup:
1191  av_dict_free(&opts);
1192  pls->cur_seg_offset = 0;
1193  return ret;
1194 }
1195 
1196 static int update_init_section(struct playlist *pls, struct segment *seg)
1197 {
1198  static const int max_init_section_size = 1024*1024;
1199  HLSContext *c = pls->parent->priv_data;
1200  int64_t sec_size;
1201  int64_t urlsize;
1202  int ret;
1203 
1204  if (seg->init_section == pls->cur_init_section)
1205  return 0;
1206 
1207  pls->cur_init_section = NULL;
1208 
1209  if (!seg->init_section)
1210  return 0;
1211 
1212  ret = open_input(c, pls, seg->init_section);
1213  if (ret < 0) {
1215  "Failed to open an initialization section in playlist %d\n",
1216  pls->index);
1217  return ret;
1218  }
1219 
1220  if (seg->init_section->size >= 0)
1221  sec_size = seg->init_section->size;
1222  else if ((urlsize = avio_size(pls->input)) >= 0)
1223  sec_size = urlsize;
1224  else
1225  sec_size = max_init_section_size;
1226 
1227  av_log(pls->parent, AV_LOG_DEBUG,
1228  "Downloading an initialization section of size %"PRId64"\n",
1229  sec_size);
1230 
1231  sec_size = FFMIN(sec_size, max_init_section_size);
1232 
1233  av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size);
1234 
1235  ret = read_from_url(pls, seg->init_section, pls->init_sec_buf,
1237  ff_format_io_close(pls->parent, &pls->input);
1238 
1239  if (ret < 0)
1240  return ret;
1241 
1242  pls->cur_init_section = seg->init_section;
1243  pls->init_sec_data_len = ret;
1244  pls->init_sec_buf_read_offset = 0;
1245 
1246  /* spec says audio elementary streams do not have media initialization
1247  * sections, so there should be no ID3 timestamps */
1248  pls->is_id3_timestamped = 0;
1249 
1250  return 0;
1251 }
1252 
1253 static int64_t default_reload_interval(struct playlist *pls)
1254 {
1255  return pls->n_segments > 0 ?
1256  pls->segments[pls->n_segments - 1]->duration :
1257  pls->target_duration;
1258 }
1259 
1260 static int read_data(void *opaque, uint8_t *buf, int buf_size)
1261 {
1262  struct playlist *v = opaque;
1263  HLSContext *c = v->parent->priv_data;
1264  int ret, i;
1265  int just_opened = 0;
1266 
1267 restart:
1268  if (!v->needed)
1269  return AVERROR_EOF;
1270 
1271  if (!v->input) {
1272  int64_t reload_interval;
1273  struct segment *seg;
1274 
1275  /* Check that the playlist is still needed before opening a new
1276  * segment. */
1277  if (v->ctx && v->ctx->nb_streams) {
1278  v->needed = 0;
1279  for (i = 0; i < v->n_main_streams; i++) {
1280  if (v->main_streams[i]->discard < AVDISCARD_ALL) {
1281  v->needed = 1;
1282  break;
1283  }
1284  }
1285  }
1286  if (!v->needed) {
1287  av_log(v->parent, AV_LOG_INFO, "No longer receiving playlist %d\n",
1288  v->index);
1289  return AVERROR_EOF;
1290  }
1291 
1292  /* If this is a live stream and the reload interval has elapsed since
1293  * the last playlist reload, reload the playlists now. */
1294  reload_interval = default_reload_interval(v);
1295 
1296 reload:
1297  if (!v->finished &&
1298  av_gettime_relative() - v->last_load_time >= reload_interval) {
1299  if ((ret = parse_playlist(c, v->url, v, NULL)) < 0) {
1300  av_log(v->parent, AV_LOG_WARNING, "Failed to reload playlist %d\n",
1301  v->index);
1302  return ret;
1303  }
1304  /* If we need to reload the playlist again below (if
1305  * there's still no more segments), switch to a reload
1306  * interval of half the target duration. */
1307  reload_interval = v->target_duration / 2;
1308  }
1309  if (v->cur_seq_no < v->start_seq_no) {
1311  "skipping %d segments ahead, expired from playlists\n",
1312  v->start_seq_no - v->cur_seq_no);
1313  v->cur_seq_no = v->start_seq_no;
1314  }
1315  if (v->cur_seq_no >= v->start_seq_no + v->n_segments) {
1316  if (v->finished)
1317  return AVERROR_EOF;
1318  while (av_gettime_relative() - v->last_load_time < reload_interval) {
1320  return AVERROR_EXIT;
1321  av_usleep(100*1000);
1322  }
1323  /* Enough time has elapsed since the last reload */
1324  goto reload;
1325  }
1326 
1327  seg = current_segment(v);
1328 
1329  /* load/update Media Initialization Section, if any */
1330  ret = update_init_section(v, seg);
1331  if (ret)
1332  return ret;
1333 
1334  ret = open_input(c, v, seg);
1335  if (ret < 0) {
1337  return AVERROR_EXIT;
1338  av_log(v->parent, AV_LOG_WARNING, "Failed to open segment of playlist %d\n",
1339  v->index);
1340  v->cur_seq_no += 1;
1341  goto reload;
1342  }
1343  just_opened = 1;
1344  }
1345 
1347  /* Push init section out first before first actual segment */
1348  int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size);
1349  memcpy(buf, v->init_sec_buf, copy_size);
1350  v->init_sec_buf_read_offset += copy_size;
1351  return copy_size;
1352  }
1353 
1354  ret = read_from_url(v, current_segment(v), buf, buf_size, READ_NORMAL);
1355  if (ret > 0) {
1356  if (just_opened && v->is_id3_timestamped != 0) {
1357  /* Intercept ID3 tags here, elementary audio streams are required
1358  * to convey timestamps using them in the beginning of each segment. */
1359  intercept_id3(v, buf, buf_size, &ret);
1360  }
1361 
1362  return ret;
1363  }
1364  ff_format_io_close(v->parent, &v->input);
1365  v->cur_seq_no++;
1366 
1367  c->cur_seq_no = v->cur_seq_no;
1368 
1369  goto restart;
1370 }
1371 
1372 static void add_renditions_to_variant(HLSContext *c, struct variant *var,
1373  enum AVMediaType type, const char *group_id)
1374 {
1375  int i;
1376 
1377  for (i = 0; i < c->n_renditions; i++) {
1378  struct rendition *rend = c->renditions[i];
1379 
1380  if (rend->type == type && !strcmp(rend->group_id, group_id)) {
1381 
1382  if (rend->playlist)
1383  /* rendition is an external playlist
1384  * => add the playlist to the variant */
1385  dynarray_add(&var->playlists, &var->n_playlists, rend->playlist);
1386  else
1387  /* rendition is part of the variant main Media Playlist
1388  * => add the rendition to the main Media Playlist */
1389  dynarray_add(&var->playlists[0]->renditions,
1390  &var->playlists[0]->n_renditions,
1391  rend);
1392  }
1393  }
1394 }
1395 
1397  enum AVMediaType type)
1398 {
1399  int rend_idx = 0;
1400  int i;
1401 
1402  for (i = 0; i < pls->n_main_streams; i++) {
1403  AVStream *st = pls->main_streams[i];
1404 
1405  if (st->codecpar->codec_type != type)
1406  continue;
1407 
1408  for (; rend_idx < pls->n_renditions; rend_idx++) {
1409  struct rendition *rend = pls->renditions[rend_idx];
1410 
1411  if (rend->type != type)
1412  continue;
1413 
1414  if (rend->language[0])
1415  av_dict_set(&st->metadata, "language", rend->language, 0);
1416  if (rend->name[0])
1417  av_dict_set(&st->metadata, "comment", rend->name, 0);
1418 
1419  st->disposition |= rend->disposition;
1420  }
1421  if (rend_idx >=pls->n_renditions)
1422  break;
1423  }
1424 }
1425 
1426 /* if timestamp was in valid range: returns 1 and sets seq_no
1427  * if not: returns 0 and sets seq_no to closest segment */
1429  int64_t timestamp, int *seq_no)
1430 {
1431  int i;
1432  int64_t pos = c->first_timestamp == AV_NOPTS_VALUE ?
1433  0 : c->first_timestamp;
1434 
1435  if (timestamp < pos) {
1436  *seq_no = pls->start_seq_no;
1437  return 0;
1438  }
1439 
1440  for (i = 0; i < pls->n_segments; i++) {
1441  int64_t diff = pos + pls->segments[i]->duration - timestamp;
1442  if (diff > 0) {
1443  *seq_no = pls->start_seq_no + i;
1444  return 1;
1445  }
1446  pos += pls->segments[i]->duration;
1447  }
1448 
1449  *seq_no = pls->start_seq_no + pls->n_segments - 1;
1450 
1451  return 0;
1452 }
1453 
1454 static int select_cur_seq_no(HLSContext *c, struct playlist *pls)
1455 {
1456  int seq_no;
1457 
1458  if (!pls->finished && !c->first_packet &&
1460  /* reload the playlist since it was suspended */
1461  parse_playlist(c, pls->url, pls, NULL);
1462 
1463  /* If playback is already in progress (we are just selecting a new
1464  * playlist) and this is a complete file, find the matching segment
1465  * by counting durations. */
1466  if (pls->finished && c->cur_timestamp != AV_NOPTS_VALUE) {
1467  find_timestamp_in_playlist(c, pls, c->cur_timestamp, &seq_no);
1468  return seq_no;
1469  }
1470 
1471  if (!pls->finished) {
1472  if (!c->first_packet && /* we are doing a segment selection during playback */
1473  c->cur_seq_no >= pls->start_seq_no &&
1474  c->cur_seq_no < pls->start_seq_no + pls->n_segments)
1475  /* While spec 3.4.3 says that we cannot assume anything about the
1476  * content at the same sequence number on different playlists,
1477  * in practice this seems to work and doing it otherwise would
1478  * require us to download a segment to inspect its timestamps. */
1479  return c->cur_seq_no;
1480 
1481  /* If this is a live stream, start live_start_index segments from the
1482  * start or end */
1483  if (c->live_start_index < 0)
1484  return pls->start_seq_no + FFMAX(pls->n_segments + c->live_start_index, 0);
1485  else
1486  return pls->start_seq_no + FFMIN(c->live_start_index, pls->n_segments - 1);
1487  }
1488 
1489  /* Otherwise just start on the first segment. */
1490  return pls->start_seq_no;
1491 }
1492 
1494 {
1495  HLSContext *c = s->priv_data;
1496  static const char *opts[] = {
1497  "headers", "http_proxy", "user_agent", "user-agent", "cookies", NULL };
1498  const char **opt = opts;
1499  uint8_t *buf;
1500  int ret = 0;
1501 
1502  while (*opt) {
1503  if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN | AV_OPT_ALLOW_NULL, &buf) >= 0) {
1504  ret = av_dict_set(&c->avio_opts, *opt, buf,
1506  if (ret < 0)
1507  return ret;
1508  }
1509  opt++;
1510  }
1511 
1512  return ret;
1513 }
1514 
1515 static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url,
1516  int flags, AVDictionary **opts)
1517 {
1518  av_log(s, AV_LOG_ERROR,
1519  "A HLS playlist item '%s' referred to an external file '%s'. "
1520  "Opening this file was forbidden for security reasons\n",
1521  s->filename, url);
1522  return AVERROR(EPERM);
1523 }
1524 
1525 static void add_stream_to_programs(AVFormatContext *s, struct playlist *pls, AVStream *stream)
1526 {
1527  HLSContext *c = s->priv_data;
1528  int i, j;
1529  int bandwidth = -1;
1530 
1531  for (i = 0; i < c->n_variants; i++) {
1532  struct variant *v = c->variants[i];
1533 
1534  for (j = 0; j < v->n_playlists; j++) {
1535  if (v->playlists[j] != pls)
1536  continue;
1537 
1538  av_program_add_stream_index(s, i, stream->index);
1539 
1540  if (bandwidth < 0)
1541  bandwidth = v->bandwidth;
1542  else if (bandwidth != v->bandwidth)
1543  bandwidth = -1; /* stream in multiple variants with different bandwidths */
1544  }
1545  }
1546 
1547  if (bandwidth >= 0)
1548  av_dict_set_int(&stream->metadata, "variant_bitrate", bandwidth, 0);
1549 }
1550 
1552 {
1553  int err;
1554 
1555  err = avcodec_parameters_copy(st->codecpar, ist->codecpar);
1556  if (err < 0)
1557  return err;
1558 
1559  if (pls->is_id3_timestamped) /* custom timestamps via id3 */
1560  avpriv_set_pts_info(st, 33, 1, MPEG_TIME_BASE);
1561  else
1563 
1564  st->internal->need_context_update = 1;
1565 
1566  return 0;
1567 }
1568 
1569 /* add new subdemuxer streams to our context, if any */
1571 {
1572  int err;
1573 
1574  while (pls->n_main_streams < pls->ctx->nb_streams) {
1575  int ist_idx = pls->n_main_streams;
1576  AVStream *st = avformat_new_stream(s, NULL);
1577  AVStream *ist = pls->ctx->streams[ist_idx];
1578 
1579  if (!st)
1580  return AVERROR(ENOMEM);
1581 
1582  st->id = pls->index;
1583  dynarray_add(&pls->main_streams, &pls->n_main_streams, st);
1584 
1585  add_stream_to_programs(s, pls, st);
1586 
1587  err = set_stream_info_from_input_stream(st, pls, ist);
1588  if (err < 0)
1589  return err;
1590  }
1591 
1592  return 0;
1593 }
1594 
1596 {
1597  HLSContext *c = s->priv_data;
1598  int flag_needed = 0;
1599  int i;
1600 
1601  for (i = 0; i < c->n_playlists; i++) {
1602  struct playlist *pls = c->playlists[i];
1603 
1604  if (pls->has_noheader_flag) {
1605  flag_needed = 1;
1606  break;
1607  }
1608  }
1609 
1610  if (flag_needed)
1612  else
1614 }
1615 
1617 {
1618  HLSContext *c = s->priv_data;
1619 
1620  free_playlist_list(c);
1621  free_variant_list(c);
1623 
1624  av_dict_free(&c->avio_opts);
1625 
1626  return 0;
1627 }
1628 
1630 {
1631  void *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb;
1632  HLSContext *c = s->priv_data;
1633  int ret = 0, i;
1634  int highest_cur_seq_no = 0;
1635 
1636  c->ctx = s;
1637  c->interrupt_callback = &s->interrupt_callback;
1638  c->strict_std_compliance = s->strict_std_compliance;
1639 
1640  c->first_packet = 1;
1641  c->first_timestamp = AV_NOPTS_VALUE;
1642  c->cur_timestamp = AV_NOPTS_VALUE;
1643 
1644  if (u) {
1645  // get the previous user agent & set back to null if string size is zero
1646  update_options(&c->user_agent, "user_agent", u);
1647 
1648  // get the previous cookies & set back to null if string size is zero
1649  update_options(&c->cookies, "cookies", u);
1650 
1651  // get the previous headers & set back to null if string size is zero
1652  update_options(&c->headers, "headers", u);
1653 
1654  // get the previous http proxt & set back to null if string size is zero
1655  update_options(&c->http_proxy, "http_proxy", u);
1656  }
1657 
1658  if ((ret = parse_playlist(c, s->filename, NULL, s->pb)) < 0)
1659  goto fail;
1660 
1661  if ((ret = save_avio_options(s)) < 0)
1662  goto fail;
1663 
1664  /* Some HLS servers don't like being sent the range header */
1665  av_dict_set(&c->avio_opts, "seekable", "0", 0);
1666 
1667  if (c->n_variants == 0) {
1668  av_log(NULL, AV_LOG_WARNING, "Empty playlist\n");
1669  ret = AVERROR_EOF;
1670  goto fail;
1671  }
1672  /* If the playlist only contained playlists (Master Playlist),
1673  * parse each individual playlist. */
1674  if (c->n_playlists > 1 || c->playlists[0]->n_segments == 0) {
1675  for (i = 0; i < c->n_playlists; i++) {
1676  struct playlist *pls = c->playlists[i];
1677  if ((ret = parse_playlist(c, pls->url, pls, NULL)) < 0)
1678  goto fail;
1679  }
1680  }
1681 
1682  if (c->variants[0]->playlists[0]->n_segments == 0) {
1683  av_log(NULL, AV_LOG_WARNING, "Empty playlist\n");
1684  ret = AVERROR_EOF;
1685  goto fail;
1686  }
1687 
1688  /* If this isn't a live stream, calculate the total duration of the
1689  * stream. */
1690  if (c->variants[0]->playlists[0]->finished) {
1691  int64_t duration = 0;
1692  for (i = 0; i < c->variants[0]->playlists[0]->n_segments; i++)
1693  duration += c->variants[0]->playlists[0]->segments[i]->duration;
1694  s->duration = duration;
1695  }
1696 
1697  /* Associate renditions with variants */
1698  for (i = 0; i < c->n_variants; i++) {
1699  struct variant *var = c->variants[i];
1700 
1701  if (var->audio_group[0])
1703  if (var->video_group[0])
1705  if (var->subtitles_group[0])
1707  }
1708 
1709  /* Create a program for each variant */
1710  for (i = 0; i < c->n_variants; i++) {
1711  struct variant *v = c->variants[i];
1712  AVProgram *program;
1713 
1714  program = av_new_program(s, i);
1715  if (!program)
1716  goto fail;
1717  av_dict_set_int(&program->metadata, "variant_bitrate", v->bandwidth, 0);
1718  }
1719 
1720  /* Select the starting segments */
1721  for (i = 0; i < c->n_playlists; i++) {
1722  struct playlist *pls = c->playlists[i];
1723 
1724  if (pls->n_segments == 0)
1725  continue;
1726 
1727  pls->cur_seq_no = select_cur_seq_no(c, pls);
1728  highest_cur_seq_no = FFMAX(highest_cur_seq_no, pls->cur_seq_no);
1729  }
1730 
1731  /* Open the demuxer for each playlist */
1732  for (i = 0; i < c->n_playlists; i++) {
1733  struct playlist *pls = c->playlists[i];
1734  AVInputFormat *in_fmt = NULL;
1735 
1736  if (!(pls->ctx = avformat_alloc_context())) {
1737  ret = AVERROR(ENOMEM);
1738  goto fail;
1739  }
1740 
1741  if (pls->n_segments == 0)
1742  continue;
1743 
1744  pls->index = i;
1745  pls->needed = 1;
1746  pls->parent = s;
1747 
1748  /*
1749  * If this is a live stream and this playlist looks like it is one segment
1750  * behind, try to sync it up so that every substream starts at the same
1751  * time position (so e.g. avformat_find_stream_info() will see packets from
1752  * all active streams within the first few seconds). This is not very generic,
1753  * though, as the sequence numbers are technically independent.
1754  */
1755  if (!pls->finished && pls->cur_seq_no == highest_cur_seq_no - 1 &&
1756  highest_cur_seq_no < pls->start_seq_no + pls->n_segments) {
1757  pls->cur_seq_no = highest_cur_seq_no;
1758  }
1759 
1761  if (!pls->read_buffer){
1762  ret = AVERROR(ENOMEM);
1763  avformat_free_context(pls->ctx);
1764  pls->ctx = NULL;
1765  goto fail;
1766  }
1767  ffio_init_context(&pls->pb, pls->read_buffer, INITIAL_BUFFER_SIZE, 0, pls,
1768  read_data, NULL, NULL);
1769  pls->pb.seekable = 0;
1770  ret = av_probe_input_buffer(&pls->pb, &in_fmt, pls->segments[0]->url,
1771  NULL, 0, 0);
1772  if (ret < 0) {
1773  /* Free the ctx - it isn't initialized properly at this point,
1774  * so avformat_close_input shouldn't be called. If
1775  * avformat_open_input fails below, it frees and zeros the
1776  * context, so it doesn't need any special treatment like this. */
1777  av_log(s, AV_LOG_ERROR, "Error when loading first segment '%s'\n", pls->segments[0]->url);
1778  avformat_free_context(pls->ctx);
1779  pls->ctx = NULL;
1780  goto fail;
1781  }
1782  pls->ctx->pb = &pls->pb;
1783  pls->ctx->io_open = nested_io_open;
1784  pls->ctx->flags |= s->flags & ~AVFMT_FLAG_CUSTOM_IO;
1785 
1786  if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
1787  goto fail;
1788 
1789  ret = avformat_open_input(&pls->ctx, pls->segments[0]->url, in_fmt, NULL);
1790  if (ret < 0)
1791  goto fail;
1792 
1793  if (pls->id3_deferred_extra && pls->ctx->nb_streams == 1) {
1797  pls->id3_deferred_extra = NULL;
1798  }
1799 
1800  if (pls->is_id3_timestamped == -1)
1801  av_log(s, AV_LOG_WARNING, "No expected HTTP requests have been made\n");
1802 
1803  /*
1804  * For ID3 timestamped raw audio streams we need to detect the packet
1805  * durations to calculate timestamps in fill_timing_for_id3_timestamped_stream(),
1806  * but for other streams we can rely on our user calling avformat_find_stream_info()
1807  * on us if they want to.
1808  */
1809  if (pls->is_id3_timestamped) {
1810  ret = avformat_find_stream_info(pls->ctx, NULL);
1811  if (ret < 0)
1812  goto fail;
1813  }
1814 
1815  pls->has_noheader_flag = !!(pls->ctx->ctx_flags & AVFMTCTX_NOHEADER);
1816 
1817  /* Create new AVStreams for each stream in this playlist */
1818  ret = update_streams_from_subdemuxer(s, pls);
1819  if (ret < 0)
1820  goto fail;
1821 
1825  }
1826 
1828 
1829  return 0;
1830 fail:
1831  hls_close(s);
1832  return ret;
1833 }
1834 
1835 static int recheck_discard_flags(AVFormatContext *s, int first)
1836 {
1837  HLSContext *c = s->priv_data;
1838  int i, changed = 0;
1839 
1840  /* Check if any new streams are needed */
1841  for (i = 0; i < c->n_playlists; i++)
1842  c->playlists[i]->cur_needed = 0;
1843 
1844  for (i = 0; i < s->nb_streams; i++) {
1845  AVStream *st = s->streams[i];
1846  struct playlist *pls = c->playlists[s->streams[i]->id];
1847  if (st->discard < AVDISCARD_ALL)
1848  pls->cur_needed = 1;
1849  }
1850  for (i = 0; i < c->n_playlists; i++) {
1851  struct playlist *pls = c->playlists[i];
1852  if (pls->cur_needed && !pls->needed) {
1853  pls->needed = 1;
1854  changed = 1;
1855  pls->cur_seq_no = select_cur_seq_no(c, pls);
1856  pls->pb.eof_reached = 0;
1857  if (c->cur_timestamp != AV_NOPTS_VALUE) {
1858  /* catch up */
1859  pls->seek_timestamp = c->cur_timestamp;
1860  pls->seek_flags = AVSEEK_FLAG_ANY;
1861  pls->seek_stream_index = -1;
1862  }
1863  av_log(s, AV_LOG_INFO, "Now receiving playlist %d, segment %d\n", i, pls->cur_seq_no);
1864  } else if (first && !pls->cur_needed && pls->needed) {
1865  if (pls->input)
1866  ff_format_io_close(pls->parent, &pls->input);
1867  pls->needed = 0;
1868  changed = 1;
1869  av_log(s, AV_LOG_INFO, "No longer receiving playlist %d\n", i);
1870  }
1871  }
1872  return changed;
1873 }
1874 
1876 {
1877  if (pls->id3_offset >= 0) {
1878  pls->pkt.dts = pls->id3_mpegts_timestamp +
1879  av_rescale_q(pls->id3_offset,
1880  pls->ctx->streams[pls->pkt.stream_index]->time_base,
1882  if (pls->pkt.duration)
1883  pls->id3_offset += pls->pkt.duration;
1884  else
1885  pls->id3_offset = -1;
1886  } else {
1887  /* there have been packets with unknown duration
1888  * since the last id3 tag, should not normally happen */
1889  pls->pkt.dts = AV_NOPTS_VALUE;
1890  }
1891 
1892  if (pls->pkt.duration)
1893  pls->pkt.duration = av_rescale_q(pls->pkt.duration,
1894  pls->ctx->streams[pls->pkt.stream_index]->time_base,
1896 
1897  pls->pkt.pts = AV_NOPTS_VALUE;
1898 }
1899 
1900 static AVRational get_timebase(struct playlist *pls)
1901 {
1902  if (pls->is_id3_timestamped)
1903  return MPEG_TIME_BASE_Q;
1904 
1905  return pls->ctx->streams[pls->pkt.stream_index]->time_base;
1906 }
1907 
1908 static int compare_ts_with_wrapdetect(int64_t ts_a, struct playlist *pls_a,
1909  int64_t ts_b, struct playlist *pls_b)
1910 {
1911  int64_t scaled_ts_a = av_rescale_q(ts_a, get_timebase(pls_a), MPEG_TIME_BASE_Q);
1912  int64_t scaled_ts_b = av_rescale_q(ts_b, get_timebase(pls_b), MPEG_TIME_BASE_Q);
1913 
1914  return av_compare_mod(scaled_ts_a, scaled_ts_b, 1LL << 33);
1915 }
1916 
1918 {
1919  HLSContext *c = s->priv_data;
1920  int ret, i, minplaylist = -1;
1921 
1923  c->first_packet = 0;
1924 
1925  for (i = 0; i < c->n_playlists; i++) {
1926  struct playlist *pls = c->playlists[i];
1927  /* Make sure we've got one buffered packet from each open playlist
1928  * stream */
1929  if (pls->needed && !pls->pkt.data) {
1930  while (1) {
1931  int64_t ts_diff;
1932  AVRational tb;
1933  ret = av_read_frame(pls->ctx, &pls->pkt);
1934  if (ret < 0) {
1935  if (!avio_feof(&pls->pb) && ret != AVERROR_EOF)
1936  return ret;
1937  reset_packet(&pls->pkt);
1938  break;
1939  } else {
1940  /* stream_index check prevents matching picture attachments etc. */
1941  if (pls->is_id3_timestamped && pls->pkt.stream_index == 0) {
1942  /* audio elementary streams are id3 timestamped */
1944  }
1945 
1946  if (c->first_timestamp == AV_NOPTS_VALUE &&
1947  pls->pkt.dts != AV_NOPTS_VALUE)
1948  c->first_timestamp = av_rescale_q(pls->pkt.dts,
1950  }
1951 
1952  if (pls->seek_timestamp == AV_NOPTS_VALUE)
1953  break;
1954 
1955  if (pls->seek_stream_index < 0 ||
1956  pls->seek_stream_index == pls->pkt.stream_index) {
1957 
1958  if (pls->pkt.dts == AV_NOPTS_VALUE) {
1960  break;
1961  }
1962 
1963  tb = get_timebase(pls);
1964  ts_diff = av_rescale_rnd(pls->pkt.dts, AV_TIME_BASE,
1965  tb.den, AV_ROUND_DOWN) -
1966  pls->seek_timestamp;
1967  if (ts_diff >= 0 && (pls->seek_flags & AVSEEK_FLAG_ANY ||
1968  pls->pkt.flags & AV_PKT_FLAG_KEY)) {
1970  break;
1971  }
1972  }
1973  av_packet_unref(&pls->pkt);
1974  reset_packet(&pls->pkt);
1975  }
1976  }
1977  /* Check if this stream has the packet with the lowest dts */
1978  if (pls->pkt.data) {
1979  struct playlist *minpls = minplaylist < 0 ?
1980  NULL : c->playlists[minplaylist];
1981  if (minplaylist < 0) {
1982  minplaylist = i;
1983  } else {
1984  int64_t dts = pls->pkt.dts;
1985  int64_t mindts = minpls->pkt.dts;
1986 
1987  if (dts == AV_NOPTS_VALUE ||
1988  (mindts != AV_NOPTS_VALUE && compare_ts_with_wrapdetect(dts, pls, mindts, minpls) < 0))
1989  minplaylist = i;
1990  }
1991  }
1992  }
1993 
1994  /* If we got a packet, return it */
1995  if (minplaylist >= 0) {
1996  struct playlist *pls = c->playlists[minplaylist];
1997  AVStream *ist;
1998  AVStream *st;
1999 
2000  ret = update_streams_from_subdemuxer(s, pls);
2001  if (ret < 0) {
2002  av_packet_unref(&pls->pkt);
2003  reset_packet(&pls->pkt);
2004  return ret;
2005  }
2006 
2007  /* check if noheader flag has been cleared by the subdemuxer */
2008  if (pls->has_noheader_flag && !(pls->ctx->ctx_flags & AVFMTCTX_NOHEADER)) {
2009  pls->has_noheader_flag = 0;
2011  }
2012 
2013  if (pls->pkt.stream_index >= pls->n_main_streams) {
2014  av_log(s, AV_LOG_ERROR, "stream index inconsistency: index %d, %d main streams, %d subdemuxer streams\n",
2015  pls->pkt.stream_index, pls->n_main_streams, pls->ctx->nb_streams);
2016  av_packet_unref(&pls->pkt);
2017  reset_packet(&pls->pkt);
2018  return AVERROR_BUG;
2019  }
2020 
2021  ist = pls->ctx->streams[pls->pkt.stream_index];
2022  st = pls->main_streams[pls->pkt.stream_index];
2023 
2024  *pkt = pls->pkt;
2025  pkt->stream_index = st->index;
2026  reset_packet(&c->playlists[minplaylist]->pkt);
2027 
2028  if (pkt->dts != AV_NOPTS_VALUE)
2029  c->cur_timestamp = av_rescale_q(pkt->dts,
2030  ist->time_base,
2031  AV_TIME_BASE_Q);
2032 
2033  /* There may be more situations where this would be useful, but this at least
2034  * handles newly probed codecs properly (i.e. request_probe by mpegts). */
2035  if (ist->codecpar->codec_id != st->codecpar->codec_id) {
2036  ret = set_stream_info_from_input_stream(st, pls, ist);
2037  if (ret < 0) {
2038  av_packet_unref(pkt);
2039  return ret;
2040  }
2041  }
2042 
2043  return 0;
2044  }
2045  return AVERROR_EOF;
2046 }
2047 
2048 static int hls_read_seek(AVFormatContext *s, int stream_index,
2049  int64_t timestamp, int flags)
2050 {
2051  HLSContext *c = s->priv_data;
2052  struct playlist *seek_pls = NULL;
2053  int i, seq_no;
2054  int j;
2055  int stream_subdemuxer_index;
2056  int64_t first_timestamp, seek_timestamp, duration;
2057 
2058  if ((flags & AVSEEK_FLAG_BYTE) ||
2059  !(c->variants[0]->playlists[0]->finished || c->variants[0]->playlists[0]->type == PLS_TYPE_EVENT))
2060  return AVERROR(ENOSYS);
2061 
2062  first_timestamp = c->first_timestamp == AV_NOPTS_VALUE ?
2063  0 : c->first_timestamp;
2064 
2065  seek_timestamp = av_rescale_rnd(timestamp, AV_TIME_BASE,
2066  s->streams[stream_index]->time_base.den,
2067  flags & AVSEEK_FLAG_BACKWARD ?
2069 
2070  duration = s->duration == AV_NOPTS_VALUE ?
2071  0 : s->duration;
2072 
2073  if (0 < duration && duration < seek_timestamp - first_timestamp)
2074  return AVERROR(EIO);
2075 
2076  /* find the playlist with the specified stream */
2077  for (i = 0; i < c->n_playlists; i++) {
2078  struct playlist *pls = c->playlists[i];
2079  for (j = 0; j < pls->n_main_streams; j++) {
2080  if (pls->main_streams[j] == s->streams[stream_index]) {
2081  seek_pls = pls;
2082  stream_subdemuxer_index = j;
2083  break;
2084  }
2085  }
2086  }
2087  /* check if the timestamp is valid for the playlist with the
2088  * specified stream index */
2089  if (!seek_pls || !find_timestamp_in_playlist(c, seek_pls, seek_timestamp, &seq_no))
2090  return AVERROR(EIO);
2091 
2092  /* set segment now so we do not need to search again below */
2093  seek_pls->cur_seq_no = seq_no;
2094  seek_pls->seek_stream_index = stream_subdemuxer_index;
2095 
2096  for (i = 0; i < c->n_playlists; i++) {
2097  /* Reset reading */
2098  struct playlist *pls = c->playlists[i];
2099  if (pls->input)
2100  ff_format_io_close(pls->parent, &pls->input);
2101  av_packet_unref(&pls->pkt);
2102  reset_packet(&pls->pkt);
2103  pls->pb.eof_reached = 0;
2104  /* Clear any buffered data */
2105  pls->pb.buf_end = pls->pb.buf_ptr = pls->pb.buffer;
2106  /* Reset the pos, to let the mpegts demuxer know we've seeked. */
2107  pls->pb.pos = 0;
2108  /* Flush the packet queue of the subdemuxer. */
2109  ff_read_frame_flush(pls->ctx);
2110 
2112  pls->seek_flags = flags;
2113 
2114  if (pls != seek_pls) {
2115  /* set closest segment seq_no for playlists not handled above */
2116  find_timestamp_in_playlist(c, pls, seek_timestamp, &pls->cur_seq_no);
2117  /* seek the playlist to the given position without taking
2118  * keyframes into account since this playlist does not have the
2119  * specified stream where we should look for the keyframes */
2120  pls->seek_stream_index = -1;
2121  pls->seek_flags |= AVSEEK_FLAG_ANY;
2122  }
2123  }
2124 
2126 
2127  return 0;
2128 }
2129 
2130 static int hls_probe(AVProbeData *p)
2131 {
2132  /* Require #EXTM3U at the start, and either one of the ones below
2133  * somewhere for a proper match. */
2134  if (strncmp(p->buf, "#EXTM3U", 7))
2135  return 0;
2136 
2137  if (strstr(p->buf, "#EXT-X-STREAM-INF:") ||
2138  strstr(p->buf, "#EXT-X-TARGETDURATION:") ||
2139  strstr(p->buf, "#EXT-X-MEDIA-SEQUENCE:"))
2140  return AVPROBE_SCORE_MAX;
2141  return 0;
2142 }
2143 
2144 #define OFFSET(x) offsetof(HLSContext, x)
2145 #define FLAGS AV_OPT_FLAG_DECODING_PARAM
2146 static const AVOption hls_options[] = {
2147  {"live_start_index", "segment index to start live streams at (negative values are from the end)",
2148  OFFSET(live_start_index), AV_OPT_TYPE_INT, {.i64 = -3}, INT_MIN, INT_MAX, FLAGS},
2149  {"allowed_extensions", "List of file extensions that hls is allowed to access",
2150  OFFSET(allowed_extensions), AV_OPT_TYPE_STRING,
2151  {.str = "3gp,aac,avi,flac,mkv,m3u8,m4a,m4s,m4v,mpg,mov,mp2,mp3,mp4,mpeg,mpegts,ogg,ogv,oga,ts,vob,wav"},
2152  INT_MIN, INT_MAX, FLAGS},
2153  {NULL}
2154 };
2155 
2156 static const AVClass hls_class = {
2157  .class_name = "hls,applehttp",
2158  .item_name = av_default_item_name,
2159  .option = hls_options,
2160  .version = LIBAVUTIL_VERSION_INT,
2161 };
2162 
2164  .name = "hls,applehttp",
2165  .long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
2166  .priv_class = &hls_class,
2167  .priv_data_size = sizeof(HLSContext),
2168  .read_probe = hls_probe,
2171  .read_close = hls_close,
2173 };
#define FF_COMPLIANCE_EXPERIMENTAL
Allow nonstandardized experimental things.
Definition: avcodec.h:2969
#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:1196
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:327
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:452
int strict_std_compliance
Definition: hls.c:206
ReadFromURLMode
Definition: hls.c:875
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
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:1551
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:435
static int read_from_url(struct playlist *pls, struct segment *seg, uint8_t *buf, int buf_size, enum ReadFromURLMode mode)
Definition: hls.c:880
#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:4739
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:455
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:459
static int64_t default_reload_interval(struct playlist *pls)
Definition: hls.c:1253
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:4128
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:1671
#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:239
#define AVIO_FLAG_READ
read-only
Definition: avio.h:643
char language[MAX_FIELD_LEN]
Definition: hls.c:451
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:1100
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:828
char * user_agent
holds HTTP user agent set as an AVOption to the HTTP protocol context
Definition: hls.c:201
static AVPacket pkt
static void handle_rendition_args(struct rendition_info *info, const char *key, int key_len, char **dest, int *dest_len)
Definition: hls.c:537
#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:1128
static void reset_packet(AVPacket *pkt)
Definition: hls.c:297
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:930
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:374
void ff_read_frame_flush(AVFormatContext *s)
Flush the frame reader.
Definition: utils.c:1859
#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:448
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:454
uint8_t
Round toward +infinity.
Definition: mathematics.h:83
int n_variants
Definition: hls.c:188
#define FLAGS
Definition: hls.c:2145
#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:450
int64_t cur_seg_offset
Definition: hls.c:116
char audio[MAX_FIELD_LEN]
Definition: hls.c:323
static void free_rendition_list(HLSContext *c)
Definition: hls.c:284
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1688
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:5451
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:1000
static struct playlist * new_playlist(HLSContext *c, const char *url, const char *base)
Definition: hls.c:303
AVInputFormat ff_hls_demuxer
Definition: hls.c:2163
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4369
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:959
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:1670
AVProgram * av_new_program(AVFormatContext *s, int id)
Definition: utils.c:4468
static int read_data(void *opaque, uint8_t *buf, int buf_size)
Definition: hls.c:1260
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:1396
#define av_log(a,...)
static void free_playlist_list(HLSContext *c)
Definition: hls.c:241
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:630
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:1702
struct variant ** variants
Definition: hls.c:189
static AVRational get_timebase(struct playlist *pls)
Definition: hls.c:1900
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:1908
#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:2156
AVIOInterruptCB * interrupt_callback
Definition: hls.c:200
char bandwidth[20]
Definition: hls.c:321
static void handle_key_args(struct key_info *info, const char *key, int key_len, char **dest, int *dest_len)
Definition: hls.c:378
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:395
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:218
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:4124
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1112
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:1570
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:1428
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:95
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1676
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:870
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:1515
#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:1372
uint8_t * init_sec_buf
Definition: hls.c:121
static int hls_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: hls.c:1917
uint8_t * id3_buf
Definition: hls.c:134
Definition: hls.c:372
static struct segment * new_init_section(struct playlist *pls, struct init_section_info *info, const char *url_base)
Definition: hls.c:398
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:328
#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:791
Usually treated as AVMEDIA_TYPE_DATA.
Definition: avutil.h:200
static void fill_timing_for_id3_timestamped_stream(struct playlist *pls)
Definition: hls.c:1875
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:453
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:510
#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:591
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:210
static void parse_id3(AVFormatContext *s, AVIOContext *pb, AVDictionary **metadata, int64_t *dts, ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta **extra_meta)
Definition: hls.c:904
#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:325
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:662
enum PlaylistType type
Definition: hls.c:109
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
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:666
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:617
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:2146
static int hls_read_header(AVFormatContext *s)
Definition: hls.c:1629
void * buf
Definition: avisynth_c.h:690
GLint GLenum type
Definition: opengl_enc.c:105
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:70
struct playlist ** playlists
Definition: hls.c:191
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:50
int64_t last_load_time
Definition: hls.c:117
Describe the class of an AVClass context structure.
Definition: log.h:67
static void update_noheader_flag(AVFormatContext *s)
Definition: hls.c:1595
#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:1493
#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:599
char uri[MAX_URL_SIZE]
Definition: hls.c:449
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:1525
#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:4304
#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:4711
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1711
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:354
const char * avio_find_protocol_name(const char *url)
Return the name of the protocol that will handle the passed URL.
Definition: avio.c:473
int size
Size of data in bytes.
Definition: buffer.h:93
AVDictionary * metadata
Definition: avformat.h: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:1835
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:4769
int64_t seek_timestamp
Definition: hls.c:141
char iv[35]
Definition: hls.c:375
#define OFFSET(x)
Definition: hls.c:2144
char characteristics[MAX_CHARACTERISTICS_LEN]
Definition: hls.c:456
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:373
if(ret< 0)
Definition: vf_mcdeint.c:282
#define INITIAL_BUFFER_SIZE
Definition: hls.c:41
int ff_id3v2_match(const uint8_t *buf, const char *magic)
Detect ID3v2 Header.
Definition: id3v2.c:141
int ffio_init_context(AVIOContext *s, unsigned char *buffer, int buffer_size, int write_flag, void *opaque, int(*read_packet)(void *opaque, uint8_t *buf, int buf_size), int(*write_packet)(void *opaque, uint8_t *buf, int buf_size), int64_t(*seek)(void *opaque, int64_t offset, int whence))
Definition: aviobuf.c:81
#define MAX_FIELD_LEN
Definition: hls.c:43
int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
Read packets of a media file to get stream information.
Definition: utils.c:3495
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:4341
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:775
static int hls_probe(AVProbeData *p)
Definition: hls.c:2130
static int ensure_playlist(HLSContext *c, struct playlist **pls, const char *url)
Definition: hls.c:581
static int hls_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: hls.c:2048
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:1100
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:1669
char video[MAX_FIELD_LEN]
Definition: hls.c:324
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:394
AVCodecParameters * codecpar
Definition: avformat.h:1252
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:349
int start_seq_no
Definition: hls.c:111
int stream_index
Definition: avcodec.h:1672
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:230
int64_t duration
Definition: hls.c:68
static void free_variant_list(HLSContext *c)
Definition: hls.c:272
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:1616
char * ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase)
Definition: utils.c:4690
This structure stores compressed data.
Definition: avcodec.h:1647
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:1663
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:1454
static uint8_t tmp[11]
Definition: aes_ctr.c:26