FFmpeg  4.4.6
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  * https://www.rfc-editor.org/rfc/rfc8216.txt
27  */
28 
29 #include "libavformat/http.h"
30 #include "libavutil/avstring.h"
31 #include "libavutil/avassert.h"
32 #include "libavutil/intreadwrite.h"
33 #include "libavutil/mathematics.h"
34 #include "libavutil/opt.h"
35 #include "libavutil/dict.h"
36 #include "libavutil/time.h"
37 #include "avformat.h"
38 #include "internal.h"
39 #include "avio_internal.h"
40 #include "id3v2.h"
41 
42 #define INITIAL_BUFFER_SIZE 32768
43 
44 #define MAX_FIELD_LEN 64
45 #define MAX_CHARACTERISTICS_LEN 512
46 
47 #define MPEG_TIME_BASE 90000
48 #define MPEG_TIME_BASE_Q (AVRational){1, MPEG_TIME_BASE}
49 
50 /*
51  * An apple http stream consists of a playlist with media segment files,
52  * played sequentially. There may be several playlists with the same
53  * video content, in different bandwidth variants, that are played in
54  * parallel (preferably only one bandwidth variant at a time). In this case,
55  * the user supplied the url to a main playlist that only lists the variant
56  * playlists.
57  *
58  * If the main playlist doesn't point at any variants, we still create
59  * one anonymous toplevel variant for this, to maintain the structure.
60  */
61 
62 enum KeyType {
66 };
67 
68 struct segment {
72  char *url;
73  char *key;
74  enum KeyType key_type;
75  uint8_t iv[16];
76  /* associated Media Initialization Section, treated as a segment */
78 };
79 
80 struct rendition;
81 
86 };
87 
88 /*
89  * Each playlist has its own demuxer. If it currently is active,
90  * it has an open AVIOContext too, and potentially an AVPacket
91  * containing the next packet from this stream.
92  */
93 struct playlist {
102  int index;
106 
107  /* main demuxer streams associated with this playlist
108  * indexed by the subdemuxer stream indexes */
111 
112  int finished;
113  enum PlaylistType type;
117  struct segment **segments;
118  int needed;
119  int broken;
125 
126  /* Currently active Media Initialization Section */
129  unsigned int init_sec_buf_size;
130  unsigned int init_sec_data_len;
132 
135 
136  /* ID3 timestamp handling (elementary audio streams have ID3 timestamps
137  * (and possibly other ID3 tags) in the beginning of each segment) */
138  int is_id3_timestamped; /* -1: not yet known */
139  int64_t id3_mpegts_timestamp; /* in mpegts tb */
140  int64_t id3_offset; /* in stream original tb */
141  uint8_t* id3_buf; /* temp buffer for id3 parsing */
142  unsigned int id3_buf_size;
143  AVDictionary *id3_initial; /* data from first id3 tag */
144  int id3_found; /* ID3 tag found at some point */
145  int id3_changed; /* ID3 tag data has changed at some point */
146  ID3v2ExtraMeta *id3_deferred_extra; /* stored here until subdemuxer is opened */
147 
150  int seek_stream_index; /* into subdemuxer stream array */
151 
152  /* Renditions associated with this playlist, if any.
153  * Alternative rendition playlists have a single rendition associated
154  * with them, and variant main Media Playlists may have
155  * multiple (playlist-less) renditions associated with them. */
158 
159  /* Media Initialization Sections (EXT-X-MAP) associated with this
160  * playlist, if any. */
163 };
164 
165 /*
166  * Renditions are e.g. alternative subtitle or audio streams.
167  * The rendition may either be an external playlist or it may be
168  * contained in the main Media Playlist of the variant (in which case
169  * playlist is NULL).
170  */
171 struct rendition {
172  enum AVMediaType type;
178 };
179 
180 struct variant {
182 
183  /* every variant contains at least the main Media Playlist in index 0 */
185  struct playlist **playlists;
186 
190 };
191 
192 typedef struct HLSContext {
193  AVClass *class;
196  struct variant **variants;
198  struct playlist **playlists;
201 
218 } HLSContext;
219 
220 static void free_segment_dynarray(struct segment **segments, int n_segments)
221 {
222  int i;
223  for (i = 0; i < n_segments; i++) {
224  av_freep(&segments[i]->key);
225  av_freep(&segments[i]->url);
226  av_freep(&segments[i]);
227  }
228 }
229 
230 static void free_segment_list(struct playlist *pls)
231 {
233  av_freep(&pls->segments);
234  pls->n_segments = 0;
235 }
236 
237 static void free_init_section_list(struct playlist *pls)
238 {
239  int i;
240  for (i = 0; i < pls->n_init_sections; i++) {
241  av_freep(&pls->init_sections[i]->key);
242  av_freep(&pls->init_sections[i]->url);
243  av_freep(&pls->init_sections[i]);
244  }
245  av_freep(&pls->init_sections);
246  pls->n_init_sections = 0;
247 }
248 
250 {
251  int i;
252  for (i = 0; i < c->n_playlists; i++) {
253  struct playlist *pls = c->playlists[i];
254  free_segment_list(pls);
256  av_freep(&pls->main_streams);
257  av_freep(&pls->renditions);
258  av_freep(&pls->id3_buf);
259  av_dict_free(&pls->id3_initial);
261  av_freep(&pls->init_sec_buf);
262  av_packet_free(&pls->pkt);
263  av_freep(&pls->pb.buffer);
264  ff_format_io_close(c->ctx, &pls->input);
265  pls->input_read_done = 0;
266  ff_format_io_close(c->ctx, &pls->input_next);
267  pls->input_next_requested = 0;
268  if (pls->ctx) {
269  pls->ctx->pb = NULL;
270  avformat_close_input(&pls->ctx);
271  }
272  av_free(pls);
273  }
274  av_freep(&c->playlists);
275  c->n_playlists = 0;
276 }
277 
279 {
280  int i;
281  for (i = 0; i < c->n_variants; i++) {
282  struct variant *var = c->variants[i];
283  av_freep(&var->playlists);
284  av_free(var);
285  }
286  av_freep(&c->variants);
287  c->n_variants = 0;
288 }
289 
291 {
292  int i;
293  for (i = 0; i < c->n_renditions; i++)
294  av_freep(&c->renditions[i]);
295  av_freep(&c->renditions);
296  c->n_renditions = 0;
297 }
298 
299 static struct playlist *new_playlist(HLSContext *c, const char *url,
300  const char *base)
301 {
302  struct playlist *pls = av_mallocz(sizeof(struct playlist));
303  if (!pls)
304  return NULL;
305  pls->pkt = av_packet_alloc();
306  if (!pls->pkt) {
307  av_free(pls);
308  return NULL;
309  }
310  ff_make_absolute_url(pls->url, sizeof(pls->url), base, url);
311  if (!pls->url[0]) {
312  av_packet_free(&pls->pkt);
313  av_free(pls);
314  return NULL;
315  }
317 
318  pls->is_id3_timestamped = -1;
320 
321  dynarray_add(&c->playlists, &c->n_playlists, pls);
322  return pls;
323 }
324 
325 struct variant_info {
326  char bandwidth[20];
327  /* variant group ids: */
331 };
332 
333 static struct variant *new_variant(HLSContext *c, struct variant_info *info,
334  const char *url, const char *base)
335 {
336  struct variant *var;
337  struct playlist *pls;
338 
339  pls = new_playlist(c, url, base);
340  if (!pls)
341  return NULL;
342 
343  var = av_mallocz(sizeof(struct variant));
344  if (!var)
345  return NULL;
346 
347  if (info) {
348  var->bandwidth = atoi(info->bandwidth);
349  strcpy(var->audio_group, info->audio);
350  strcpy(var->video_group, info->video);
351  strcpy(var->subtitles_group, info->subtitles);
352  }
353 
354  dynarray_add(&c->variants, &c->n_variants, var);
355  dynarray_add(&var->playlists, &var->n_playlists, pls);
356  return var;
357 }
358 
359 static void handle_variant_args(struct variant_info *info, const char *key,
360  int key_len, char **dest, int *dest_len)
361 {
362  if (!strncmp(key, "BANDWIDTH=", key_len)) {
363  *dest = info->bandwidth;
364  *dest_len = sizeof(info->bandwidth);
365  } else if (!strncmp(key, "AUDIO=", key_len)) {
366  *dest = info->audio;
367  *dest_len = sizeof(info->audio);
368  } else if (!strncmp(key, "VIDEO=", key_len)) {
369  *dest = info->video;
370  *dest_len = sizeof(info->video);
371  } else if (!strncmp(key, "SUBTITLES=", key_len)) {
372  *dest = info->subtitles;
373  *dest_len = sizeof(info->subtitles);
374  }
375 }
376 
377 struct key_info {
379  char method[11];
380  char iv[35];
381 };
382 
383 static void handle_key_args(struct key_info *info, const char *key,
384  int key_len, char **dest, int *dest_len)
385 {
386  if (!strncmp(key, "METHOD=", key_len)) {
387  *dest = info->method;
388  *dest_len = sizeof(info->method);
389  } else if (!strncmp(key, "URI=", key_len)) {
390  *dest = info->uri;
391  *dest_len = sizeof(info->uri);
392  } else if (!strncmp(key, "IV=", key_len)) {
393  *dest = info->iv;
394  *dest_len = sizeof(info->iv);
395  }
396 }
397 
400  char byterange[32];
401 };
402 
403 static struct segment *new_init_section(struct playlist *pls,
404  struct init_section_info *info,
405  const char *url_base)
406 {
407  struct segment *sec;
408  char tmp_str[MAX_URL_SIZE], *ptr = tmp_str;
409 
410  if (!info->uri[0])
411  return NULL;
412 
413  sec = av_mallocz(sizeof(*sec));
414  if (!sec)
415  return NULL;
416 
417  if (!av_strncasecmp(info->uri, "data:", 5)) {
418  ptr = info->uri;
419  } else {
420  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url_base, info->uri);
421  if (!tmp_str[0]) {
422  av_free(sec);
423  return NULL;
424  }
425  }
426  sec->url = av_strdup(ptr);
427  if (!sec->url) {
428  av_free(sec);
429  return NULL;
430  }
431 
432  if (info->byterange[0]) {
433  sec->size = strtoll(info->byterange, NULL, 10);
434  ptr = strchr(info->byterange, '@');
435  if (ptr)
436  sec->url_offset = strtoll(ptr+1, NULL, 10);
437  } else {
438  /* the entire file is the init section */
439  sec->size = -1;
440  }
441 
442  dynarray_add(&pls->init_sections, &pls->n_init_sections, sec);
443 
444  return sec;
445 }
446 
447 static void handle_init_section_args(struct init_section_info *info, const char *key,
448  int key_len, char **dest, int *dest_len)
449 {
450  if (!strncmp(key, "URI=", key_len)) {
451  *dest = info->uri;
452  *dest_len = sizeof(info->uri);
453  } else if (!strncmp(key, "BYTERANGE=", key_len)) {
454  *dest = info->byterange;
455  *dest_len = sizeof(info->byterange);
456  }
457 }
458 
460  char type[16];
466  char defaultr[4];
467  char forced[4];
469 };
470 
471 static struct rendition *new_rendition(HLSContext *c, struct rendition_info *info,
472  const char *url_base)
473 {
474  struct rendition *rend;
476  char *characteristic;
477  char *chr_ptr;
478  char *saveptr;
479 
480  if (!strcmp(info->type, "AUDIO"))
482  else if (!strcmp(info->type, "VIDEO"))
484  else if (!strcmp(info->type, "SUBTITLES"))
486  else if (!strcmp(info->type, "CLOSED-CAPTIONS"))
487  /* CLOSED-CAPTIONS is ignored since we do not support CEA-608 CC in
488  * AVC SEI RBSP anyway */
489  return NULL;
490 
491  if (type == AVMEDIA_TYPE_UNKNOWN) {
492  av_log(c->ctx, AV_LOG_WARNING, "Can't support the type: %s\n", info->type);
493  return NULL;
494  }
495 
496  /* URI is mandatory for subtitles as per spec */
497  if (type == AVMEDIA_TYPE_SUBTITLE && !info->uri[0]) {
498  av_log(c->ctx, AV_LOG_ERROR, "The URI tag is REQUIRED for subtitle.\n");
499  return NULL;
500  }
501 
502  /* TODO: handle subtitles (each segment has to parsed separately) */
503  if (c->ctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL)
504  if (type == AVMEDIA_TYPE_SUBTITLE) {
505  av_log(c->ctx, AV_LOG_WARNING, "Can't support the subtitle(uri: %s)\n", info->uri);
506  return NULL;
507  }
508 
509  rend = av_mallocz(sizeof(struct rendition));
510  if (!rend)
511  return NULL;
512 
513  dynarray_add(&c->renditions, &c->n_renditions, rend);
514 
515  rend->type = type;
516  strcpy(rend->group_id, info->group_id);
517  strcpy(rend->language, info->language);
518  strcpy(rend->name, info->name);
519 
520  /* add the playlist if this is an external rendition */
521  if (info->uri[0]) {
522  rend->playlist = new_playlist(c, info->uri, url_base);
523  if (rend->playlist)
525  &rend->playlist->n_renditions, rend);
526  }
527 
528  if (info->assoc_language[0]) {
529  int langlen = strlen(rend->language);
530  if (langlen < sizeof(rend->language) - 3) {
531  rend->language[langlen] = ',';
532  strncpy(rend->language + langlen + 1, info->assoc_language,
533  sizeof(rend->language) - langlen - 2);
534  }
535  }
536 
537  if (!strcmp(info->defaultr, "YES"))
539  if (!strcmp(info->forced, "YES"))
541 
542  chr_ptr = info->characteristics;
543  while ((characteristic = av_strtok(chr_ptr, ",", &saveptr))) {
544  if (!strcmp(characteristic, "public.accessibility.describes-music-and-sound"))
546  else if (!strcmp(characteristic, "public.accessibility.describes-video"))
548 
549  chr_ptr = NULL;
550  }
551 
552  return rend;
553 }
554 
555 static void handle_rendition_args(struct rendition_info *info, const char *key,
556  int key_len, char **dest, int *dest_len)
557 {
558  if (!strncmp(key, "TYPE=", key_len)) {
559  *dest = info->type;
560  *dest_len = sizeof(info->type);
561  } else if (!strncmp(key, "URI=", key_len)) {
562  *dest = info->uri;
563  *dest_len = sizeof(info->uri);
564  } else if (!strncmp(key, "GROUP-ID=", key_len)) {
565  *dest = info->group_id;
566  *dest_len = sizeof(info->group_id);
567  } else if (!strncmp(key, "LANGUAGE=", key_len)) {
568  *dest = info->language;
569  *dest_len = sizeof(info->language);
570  } else if (!strncmp(key, "ASSOC-LANGUAGE=", key_len)) {
571  *dest = info->assoc_language;
572  *dest_len = sizeof(info->assoc_language);
573  } else if (!strncmp(key, "NAME=", key_len)) {
574  *dest = info->name;
575  *dest_len = sizeof(info->name);
576  } else if (!strncmp(key, "DEFAULT=", key_len)) {
577  *dest = info->defaultr;
578  *dest_len = sizeof(info->defaultr);
579  } else if (!strncmp(key, "FORCED=", key_len)) {
580  *dest = info->forced;
581  *dest_len = sizeof(info->forced);
582  } else if (!strncmp(key, "CHARACTERISTICS=", key_len)) {
583  *dest = info->characteristics;
584  *dest_len = sizeof(info->characteristics);
585  }
586  /*
587  * ignored:
588  * - AUTOSELECT: client may autoselect based on e.g. system language
589  * - INSTREAM-ID: EIA-608 closed caption number ("CC1".."CC4")
590  */
591 }
592 
593 /* used by parse_playlist to allocate a new variant+playlist when the
594  * playlist is detected to be a Media Playlist (not Master Playlist)
595  * and we have no parent Master Playlist (parsing of which would have
596  * allocated the variant and playlist already)
597  * *pls == NULL => Master Playlist or parentless Media Playlist
598  * *pls != NULL => parented Media Playlist, playlist+variant allocated */
599 static int ensure_playlist(HLSContext *c, struct playlist **pls, const char *url)
600 {
601  if (*pls)
602  return 0;
603  if (!new_variant(c, NULL, url, NULL))
604  return AVERROR(ENOMEM);
605  *pls = c->playlists[c->n_playlists - 1];
606  return 0;
607 }
608 
610  const char *url, AVDictionary **options)
611 {
612 #if !CONFIG_HTTP_PROTOCOL
614 #else
615  int ret;
616  URLContext *uc = ffio_geturlcontext(*pb);
617  av_assert0(uc);
618  (*pb)->eof_reached = 0;
619  ret = ff_http_do_new_request2(uc, url, options);
620  if (ret < 0) {
621  ff_format_io_close(s, pb);
622  }
623  return ret;
624 #endif
625 }
626 
627 static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url,
628  AVDictionary **opts, AVDictionary *opts2, int *is_http_out)
629 {
630  HLSContext *c = s->priv_data;
631  AVDictionary *tmp = NULL;
632  const char *proto_name = NULL;
633  int ret;
634  int is_http = 0;
635 
636  if (av_strstart(url, "crypto", NULL)) {
637  if (url[6] == '+' || url[6] == ':')
638  proto_name = avio_find_protocol_name(url + 7);
639  } else if (av_strstart(url, "data", NULL)) {
640  if (url[4] == '+' || url[4] == ':')
641  proto_name = avio_find_protocol_name(url + 5);
642  }
643 
644  if (!proto_name)
645  proto_name = avio_find_protocol_name(url);
646 
647  if (!proto_name)
648  return AVERROR_INVALIDDATA;
649 
650  // only http(s) & file are allowed
651  if (av_strstart(proto_name, "file", NULL)) {
652  if (strcmp(c->allowed_extensions, "ALL") && !av_match_ext(url, c->allowed_extensions)) {
654  "Filename extension of \'%s\' is not a common multimedia extension, blocked for security reasons.\n"
655  "If you wish to override this adjust allowed_extensions, you can set it to \'ALL\' to allow all\n",
656  url);
657  return AVERROR_INVALIDDATA;
658  }
659  } else if (av_strstart(proto_name, "http", NULL)) {
660  is_http = 1;
661  } else if (av_strstart(proto_name, "data", NULL)) {
662  ;
663  } else
664  return AVERROR_INVALIDDATA;
665 
666  if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':')
667  ;
668  else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':')
669  ;
670  else if (av_strstart(url, "data", NULL) && !strncmp(proto_name, url + 5, strlen(proto_name)) && url[5 + strlen(proto_name)] == ':')
671  ;
672  else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))
673  return AVERROR_INVALIDDATA;
674 
675  av_dict_copy(&tmp, *opts, 0);
676  av_dict_copy(&tmp, opts2, 0);
677 
678  if (is_http && c->http_persistent && *pb) {
679  ret = open_url_keepalive(c->ctx, pb, url, &tmp);
680  if (ret == AVERROR_EXIT) {
681  av_dict_free(&tmp);
682  return ret;
683  } else if (ret < 0) {
684  if (ret != AVERROR_EOF)
686  "keepalive request failed for '%s' with error: '%s' when opening url, retrying with new connection\n",
687  url, av_err2str(ret));
688  av_dict_copy(&tmp, *opts, 0);
689  av_dict_copy(&tmp, opts2, 0);
690  ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
691  }
692  } else {
693  ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
694  }
695  if (ret >= 0) {
696  // update cookies on http response with setcookies.
697  char *new_cookies = NULL;
698 
699  if (!(s->flags & AVFMT_FLAG_CUSTOM_IO))
700  av_opt_get(*pb, "cookies", AV_OPT_SEARCH_CHILDREN, (uint8_t**)&new_cookies);
701 
702  if (new_cookies)
703  av_dict_set(opts, "cookies", new_cookies, AV_DICT_DONT_STRDUP_VAL);
704  }
705 
706  av_dict_free(&tmp);
707 
708  if (is_http_out)
709  *is_http_out = is_http;
710 
711  return ret;
712 }
713 
714 static int test_segment(AVFormatContext *s, const AVInputFormat *in_fmt, struct playlist *pls, struct segment *seg)
715 {
716  HLSContext *c = s->priv_data;
717  int matchA = 3;
718  int matchF = 0;
719 
720  if (!c->extension_picky)
721  return 0;
722 
723  if (strcmp(c->allowed_segment_extensions, "ALL"))
724  matchA = av_match_ext (seg->url, c->allowed_segment_extensions)
725  + 2*(ff_match_url_ext(seg->url, c->allowed_segment_extensions) > 0);
726 
727  if (!matchA) {
728  av_log(s, AV_LOG_ERROR, "URL %s is not in allowed_segment_extensions\n", seg->url);
729  return AVERROR_INVALIDDATA;
730  }
731 
732  if (in_fmt) {
733  if (in_fmt->extensions) {
734  matchF = av_match_ext( seg->url, in_fmt->extensions)
735  + 2*(ff_match_url_ext(seg->url, in_fmt->extensions) > 0);
736  // Youtube uses aac files with .ts extension
737  if(av_match_name("mp4", in_fmt->name) || av_match_name("aac", in_fmt->name)) {
738  matchF |= av_match_ext( seg->url, "ts,m2t,m2ts,mts,mpg,m4s,mpeg,mpegts")
739  + 2*(ff_match_url_ext(seg->url, "ts,m2t,m2ts,mts,mpg,m4s,mpeg,mpegts") > 0);
740  }
741  } else if (!strcmp(in_fmt->name, "mpegts")) {
742  const char *str = "ts,m2t,m2ts,mts,mpg,m4s,mpeg,mpegts"
743  ",html" // https://flash1.bogulus.cfd/
744  ;
745  matchF = av_match_ext( seg->url, str)
746  + 2*(ff_match_url_ext(seg->url, str) > 0);
747  }
748 
749  if (!(matchA & matchF)) {
750  av_log(s, AV_LOG_ERROR, "detected format %s extension %s mismatches allowed extensions in url %s\n", in_fmt->name, in_fmt->extensions ? in_fmt->extensions : "none", seg->url);
751  return AVERROR_INVALIDDATA;
752  }
753  }
754 
755  return 0;
756 }
757 
758 static int parse_playlist(HLSContext *c, const char *url,
759  struct playlist *pls, AVIOContext *in)
760 {
761  int ret = 0, is_segment = 0, is_variant = 0;
762  int64_t duration = 0;
763  enum KeyType key_type = KEY_NONE;
764  uint8_t iv[16] = "";
765  int has_iv = 0;
766  char key[MAX_URL_SIZE] = "";
767  char line[MAX_URL_SIZE];
768  const char *ptr;
769  int close_in = 0;
770  int64_t seg_offset = 0;
771  int64_t seg_size = -1;
772  uint8_t *new_url = NULL;
773  struct variant_info variant_info;
774  char tmp_str[MAX_URL_SIZE];
775  struct segment *cur_init_section = NULL;
776  int is_http = av_strstart(url, "http", NULL);
777  struct segment **prev_segments = NULL;
778  int prev_n_segments = 0;
779  int64_t prev_start_seq_no = -1;
780 
781  if (is_http && !in && c->http_persistent && c->playlist_pb) {
782  in = c->playlist_pb;
783  ret = open_url_keepalive(c->ctx, &c->playlist_pb, url, NULL);
784  if (ret == AVERROR_EXIT) {
785  return ret;
786  } else if (ret < 0) {
787  if (ret != AVERROR_EOF)
788  av_log(c->ctx, AV_LOG_WARNING,
789  "keepalive request failed for '%s' with error: '%s' when parsing playlist\n",
790  url, av_err2str(ret));
791  in = NULL;
792  }
793  }
794 
795  if (!in) {
797  av_dict_copy(&opts, c->avio_opts, 0);
798 
799  if (c->http_persistent)
800  av_dict_set(&opts, "multiple_requests", "1", 0);
801 
802  ret = c->ctx->io_open(c->ctx, &in, url, AVIO_FLAG_READ, &opts);
803  av_dict_free(&opts);
804  if (ret < 0)
805  return ret;
806 
807  if (is_http && c->http_persistent)
808  c->playlist_pb = in;
809  else
810  close_in = 1;
811  }
812 
813  if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >= 0)
814  url = new_url;
815 
816  ff_get_chomp_line(in, line, sizeof(line));
817  if (strcmp(line, "#EXTM3U")) {
818  ret = AVERROR_INVALIDDATA;
819  goto fail;
820  }
821 
822  if (pls) {
823  prev_start_seq_no = pls->start_seq_no;
824  prev_segments = pls->segments;
825  prev_n_segments = pls->n_segments;
826  pls->segments = NULL;
827  pls->n_segments = 0;
828 
829  pls->finished = 0;
830  pls->type = PLS_TYPE_UNSPECIFIED;
831  }
832  while (!avio_feof(in)) {
833  ff_get_chomp_line(in, line, sizeof(line));
834  if (av_strstart(line, "#EXT-X-STREAM-INF:", &ptr)) {
835  is_variant = 1;
836  memset(&variant_info, 0, sizeof(variant_info));
838  &variant_info);
839  } else if (av_strstart(line, "#EXT-X-KEY:", &ptr)) {
840  struct key_info info = {{0}};
842  &info);
843  key_type = KEY_NONE;
844  has_iv = 0;
845  if (!strcmp(info.method, "AES-128"))
846  key_type = KEY_AES_128;
847  if (!strcmp(info.method, "SAMPLE-AES"))
848  key_type = KEY_SAMPLE_AES;
849  if (!strncmp(info.iv, "0x", 2) || !strncmp(info.iv, "0X", 2)) {
850  ff_hex_to_data(iv, info.iv + 2);
851  has_iv = 1;
852  }
853  av_strlcpy(key, info.uri, sizeof(key));
854  } else if (av_strstart(line, "#EXT-X-MEDIA:", &ptr)) {
855  struct rendition_info info = {{0}};
857  &info);
858  new_rendition(c, &info, url);
859  } else if (av_strstart(line, "#EXT-X-TARGETDURATION:", &ptr)) {
860  int64_t t;
861  ret = ensure_playlist(c, &pls, url);
862  if (ret < 0)
863  goto fail;
864  t = strtoll(ptr, NULL, 10);
865  if (t < 0 || t >= INT64_MAX / AV_TIME_BASE) {
866  ret = AVERROR_INVALIDDATA;
867  goto fail;
868  }
869  pls->target_duration = t * AV_TIME_BASE;
870  } else if (av_strstart(line, "#EXT-X-MEDIA-SEQUENCE:", &ptr)) {
871  uint64_t seq_no;
872  ret = ensure_playlist(c, &pls, url);
873  if (ret < 0)
874  goto fail;
875  seq_no = strtoull(ptr, NULL, 10);
876  if (seq_no > INT64_MAX/2) {
877  av_log(c->ctx, AV_LOG_DEBUG, "MEDIA-SEQUENCE higher than "
878  "INT64_MAX/2, mask out the highest bit\n");
879  seq_no &= INT64_MAX/2;
880  }
881  pls->start_seq_no = seq_no;
882  } else if (av_strstart(line, "#EXT-X-PLAYLIST-TYPE:", &ptr)) {
883  ret = ensure_playlist(c, &pls, url);
884  if (ret < 0)
885  goto fail;
886  if (!strcmp(ptr, "EVENT"))
887  pls->type = PLS_TYPE_EVENT;
888  else if (!strcmp(ptr, "VOD"))
889  pls->type = PLS_TYPE_VOD;
890  } else if (av_strstart(line, "#EXT-X-MAP:", &ptr)) {
891  struct init_section_info info = {{0}};
892  ret = ensure_playlist(c, &pls, url);
893  if (ret < 0)
894  goto fail;
896  &info);
897  cur_init_section = new_init_section(pls, &info, url);
898  cur_init_section->key_type = key_type;
899  if (has_iv) {
900  memcpy(cur_init_section->iv, iv, sizeof(iv));
901  } else {
902  int64_t seq = pls->start_seq_no + pls->n_segments;
903  memset(cur_init_section->iv, 0, sizeof(cur_init_section->iv));
904  AV_WB64(cur_init_section->iv + 8, seq);
905  }
906 
907  if (key_type != KEY_NONE) {
908  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, key);
909  if (!tmp_str[0]) {
910  av_free(cur_init_section);
911  ret = AVERROR_INVALIDDATA;
912  goto fail;
913  }
914  cur_init_section->key = av_strdup(tmp_str);
915  if (!cur_init_section->key) {
916  av_free(cur_init_section);
917  ret = AVERROR(ENOMEM);
918  goto fail;
919  }
920  } else {
921  cur_init_section->key = NULL;
922  }
923 
924  } else if (av_strstart(line, "#EXT-X-ENDLIST", &ptr)) {
925  if (pls)
926  pls->finished = 1;
927  } else if (av_strstart(line, "#EXTINF:", &ptr)) {
928  is_segment = 1;
929  duration = atof(ptr) * AV_TIME_BASE;
930  } else if (av_strstart(line, "#EXT-X-BYTERANGE:", &ptr)) {
931  seg_size = strtoll(ptr, NULL, 10);
932  ptr = strchr(ptr, '@');
933  if (ptr)
934  seg_offset = strtoll(ptr+1, NULL, 10);
935  } else if (av_strstart(line, "#", NULL)) {
936  av_log(c->ctx, AV_LOG_INFO, "Skip ('%s')\n", line);
937  continue;
938  } else if (line[0]) {
939  if (is_variant) {
940  if (!new_variant(c, &variant_info, line, url)) {
941  ret = AVERROR(ENOMEM);
942  goto fail;
943  }
944  is_variant = 0;
945  }
946  if (is_segment) {
947  struct segment *seg;
948  ret = ensure_playlist(c, &pls, url);
949  if (ret < 0)
950  goto fail;
951  seg = av_malloc(sizeof(struct segment));
952  if (!seg) {
953  ret = AVERROR(ENOMEM);
954  goto fail;
955  }
956  if (has_iv) {
957  memcpy(seg->iv, iv, sizeof(iv));
958  } else {
959  uint64_t seq = pls->start_seq_no + (uint64_t)pls->n_segments;
960  memset(seg->iv, 0, sizeof(seg->iv));
961  AV_WB64(seg->iv + 8, seq);
962  }
963 
964  if (key_type != KEY_NONE) {
965  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, key);
966  if (!tmp_str[0]) {
967  ret = AVERROR_INVALIDDATA;
968  av_free(seg);
969  goto fail;
970  }
971  seg->key = av_strdup(tmp_str);
972  if (!seg->key) {
973  av_free(seg);
974  ret = AVERROR(ENOMEM);
975  goto fail;
976  }
977  } else {
978  seg->key = NULL;
979  }
980 
981  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, line);
982  if (!tmp_str[0]) {
983  ret = AVERROR_INVALIDDATA;
984  if (seg->key)
985  av_free(seg->key);
986  av_free(seg);
987  goto fail;
988  }
989  seg->url = av_strdup(tmp_str);
990  if (!seg->url) {
991  av_free(seg->key);
992  av_free(seg);
993  ret = AVERROR(ENOMEM);
994  goto fail;
995  }
996 
997  ret = test_segment(c->ctx, pls->ctx ? pls->ctx->iformat : NULL, pls, seg);
998  if (ret < 0) {
999  av_free(seg->url);
1000  av_free(seg->key);
1001  av_free(seg);
1002  goto fail;
1003  }
1004 
1005  if (duration < 0.001 * AV_TIME_BASE) {
1006  av_log(c->ctx, AV_LOG_WARNING, "Cannot get correct #EXTINF value of segment %s,"
1007  " set to default value to 1ms.\n", seg->url);
1008  duration = 0.001 * AV_TIME_BASE;
1009  }
1010  seg->duration = duration;
1011  seg->key_type = key_type;
1012  dynarray_add(&pls->segments, &pls->n_segments, seg);
1013  is_segment = 0;
1014 
1015  seg->size = seg_size;
1016  if (seg_size >= 0) {
1017  seg->url_offset = seg_offset;
1018  seg_offset += seg_size;
1019  seg_size = -1;
1020  } else {
1021  seg->url_offset = 0;
1022  seg_offset = 0;
1023  }
1024 
1025  seg->init_section = cur_init_section;
1026  }
1027  }
1028  }
1029  if (prev_segments) {
1030  if (pls->start_seq_no > prev_start_seq_no && c->first_timestamp != AV_NOPTS_VALUE) {
1031  int64_t prev_timestamp = c->first_timestamp;
1032  int i;
1033  int64_t diff = pls->start_seq_no - prev_start_seq_no;
1034  for (i = 0; i < prev_n_segments && i < diff; i++) {
1035  c->first_timestamp += prev_segments[i]->duration;
1036  }
1037  av_log(c->ctx, AV_LOG_DEBUG, "Media sequence change (%"PRId64" -> %"PRId64")"
1038  " reflected in first_timestamp: %"PRId64" -> %"PRId64"\n",
1039  prev_start_seq_no, pls->start_seq_no,
1040  prev_timestamp, c->first_timestamp);
1041  } else if (pls->start_seq_no < prev_start_seq_no) {
1042  av_log(c->ctx, AV_LOG_WARNING, "Media sequence changed unexpectedly: %"PRId64" -> %"PRId64"\n",
1043  prev_start_seq_no, pls->start_seq_no);
1044  }
1045  free_segment_dynarray(prev_segments, prev_n_segments);
1046  av_freep(&prev_segments);
1047  }
1048  if (pls)
1050 
1051 fail:
1052  av_free(new_url);
1053  if (close_in)
1054  ff_format_io_close(c->ctx, &in);
1055  c->ctx->ctx_flags = c->ctx->ctx_flags & ~(unsigned)AVFMTCTX_UNSEEKABLE;
1056  if (!c->n_variants || !c->variants[0]->n_playlists ||
1057  !(c->variants[0]->playlists[0]->finished ||
1058  c->variants[0]->playlists[0]->type == PLS_TYPE_EVENT))
1059  c->ctx->ctx_flags |= AVFMTCTX_UNSEEKABLE;
1060  return ret;
1061 }
1062 
1063 static struct segment *current_segment(struct playlist *pls)
1064 {
1065  return pls->segments[pls->cur_seq_no - pls->start_seq_no];
1066 }
1067 
1068 static struct segment *next_segment(struct playlist *pls)
1069 {
1070  int64_t n = pls->cur_seq_no - pls->start_seq_no + 1;
1071  if (n >= pls->n_segments)
1072  return NULL;
1073  return pls->segments[n];
1074 }
1075 
1076 static int read_from_url(struct playlist *pls, struct segment *seg,
1077  uint8_t *buf, int buf_size)
1078 {
1079  int ret;
1080 
1081  /* limit read if the segment was only a part of a file */
1082  if (seg->size >= 0)
1083  buf_size = FFMIN(buf_size, seg->size - pls->cur_seg_offset);
1084 
1085  ret = avio_read(pls->input, buf, buf_size);
1086  if (ret > 0)
1087  pls->cur_seg_offset += ret;
1088 
1089  return ret;
1090 }
1091 
1092 /* Parse the raw ID3 data and pass contents to caller */
1094  AVDictionary **metadata, int64_t *dts,
1095  ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta **extra_meta)
1096 {
1097  static const char id3_priv_owner_ts[] = "com.apple.streaming.transportStreamTimestamp";
1098  ID3v2ExtraMeta *meta;
1099 
1100  ff_id3v2_read_dict(pb, metadata, ID3v2_DEFAULT_MAGIC, extra_meta);
1101  for (meta = *extra_meta; meta; meta = meta->next) {
1102  if (!strcmp(meta->tag, "PRIV")) {
1103  ID3v2ExtraMetaPRIV *priv = &meta->data.priv;
1104  if (priv->datasize == 8 && !strcmp(priv->owner, id3_priv_owner_ts)) {
1105  /* 33-bit MPEG timestamp */
1106  int64_t ts = AV_RB64(priv->data);
1107  av_log(s, AV_LOG_DEBUG, "HLS ID3 audio timestamp %"PRId64"\n", ts);
1108  if ((ts & ~((1ULL << 33) - 1)) == 0)
1109  *dts = ts;
1110  else
1111  av_log(s, AV_LOG_ERROR, "Invalid HLS ID3 audio timestamp %"PRId64"\n", ts);
1112  }
1113  } else if (!strcmp(meta->tag, "APIC") && apic)
1114  *apic = &meta->data.apic;
1115  }
1116 }
1117 
1118 /* Check if the ID3 metadata contents have changed */
1119 static int id3_has_changed_values(struct playlist *pls, AVDictionary *metadata,
1120  ID3v2ExtraMetaAPIC *apic)
1121 {
1122  AVDictionaryEntry *entry = NULL;
1123  AVDictionaryEntry *oldentry;
1124  /* check that no keys have changed values */
1125  while ((entry = av_dict_get(metadata, "", entry, AV_DICT_IGNORE_SUFFIX))) {
1126  oldentry = av_dict_get(pls->id3_initial, entry->key, NULL, AV_DICT_MATCH_CASE);
1127  if (!oldentry || strcmp(oldentry->value, entry->value) != 0)
1128  return 1;
1129  }
1130 
1131  /* check if apic appeared */
1132  if (apic && (pls->ctx->nb_streams != 2 || !pls->ctx->streams[1]->attached_pic.data))
1133  return 1;
1134 
1135  if (apic) {
1136  int size = pls->ctx->streams[1]->attached_pic.size;
1137  if (size != apic->buf->size - AV_INPUT_BUFFER_PADDING_SIZE)
1138  return 1;
1139 
1140  if (memcmp(apic->buf->data, pls->ctx->streams[1]->attached_pic.data, size) != 0)
1141  return 1;
1142  }
1143 
1144  return 0;
1145 }
1146 
1147 /* Parse ID3 data and handle the found data */
1148 static void handle_id3(AVIOContext *pb, struct playlist *pls)
1149 {
1150  AVDictionary *metadata = NULL;
1151  ID3v2ExtraMetaAPIC *apic = NULL;
1152  ID3v2ExtraMeta *extra_meta = NULL;
1153  int64_t timestamp = AV_NOPTS_VALUE;
1154 
1155  parse_id3(pls->ctx, pb, &metadata, &timestamp, &apic, &extra_meta);
1156 
1157  if (timestamp != AV_NOPTS_VALUE) {
1158  pls->id3_mpegts_timestamp = timestamp;
1159  pls->id3_offset = 0;
1160  }
1161 
1162  if (!pls->id3_found) {
1163  /* initial ID3 tags */
1165  pls->id3_found = 1;
1166 
1167  /* get picture attachment and set text metadata */
1168  if (pls->ctx->nb_streams)
1169  ff_id3v2_parse_apic(pls->ctx, extra_meta);
1170  else
1171  /* demuxer not yet opened, defer picture attachment */
1172  pls->id3_deferred_extra = extra_meta;
1173 
1174  ff_id3v2_parse_priv_dict(&metadata, extra_meta);
1175  av_dict_copy(&pls->ctx->metadata, metadata, 0);
1176  pls->id3_initial = metadata;
1177 
1178  } else {
1179  if (!pls->id3_changed && id3_has_changed_values(pls, metadata, apic)) {
1180  avpriv_report_missing_feature(pls->parent, "Changing ID3 metadata in HLS audio elementary stream");
1181  pls->id3_changed = 1;
1182  }
1183  av_dict_free(&metadata);
1184  }
1185 
1186  if (!pls->id3_deferred_extra)
1187  ff_id3v2_free_extra_meta(&extra_meta);
1188 }
1189 
1190 static void intercept_id3(struct playlist *pls, uint8_t *buf,
1191  int buf_size, int *len)
1192 {
1193  /* intercept id3 tags, we do not want to pass them to the raw
1194  * demuxer on all segment switches */
1195  int bytes;
1196  int id3_buf_pos = 0;
1197  int fill_buf = 0;
1198  struct segment *seg = current_segment(pls);
1199 
1200  /* gather all the id3 tags */
1201  while (1) {
1202  /* see if we can retrieve enough data for ID3 header */
1203  if (*len < ID3v2_HEADER_SIZE && buf_size >= ID3v2_HEADER_SIZE) {
1204  bytes = read_from_url(pls, seg, buf + *len, ID3v2_HEADER_SIZE - *len);
1205  if (bytes > 0) {
1206 
1207  if (bytes == ID3v2_HEADER_SIZE - *len)
1208  /* no EOF yet, so fill the caller buffer again after
1209  * we have stripped the ID3 tags */
1210  fill_buf = 1;
1211 
1212  *len += bytes;
1213 
1214  } else if (*len <= 0) {
1215  /* error/EOF */
1216  *len = bytes;
1217  fill_buf = 0;
1218  }
1219  }
1220 
1221  if (*len < ID3v2_HEADER_SIZE)
1222  break;
1223 
1224  if (ff_id3v2_match(buf, ID3v2_DEFAULT_MAGIC)) {
1225  int64_t maxsize = seg->size >= 0 ? seg->size : 1024*1024;
1226  int taglen = ff_id3v2_tag_len(buf);
1227  int tag_got_bytes = FFMIN(taglen, *len);
1228  int remaining = taglen - tag_got_bytes;
1229 
1230  if (taglen > maxsize) {
1231  av_log(pls->parent, AV_LOG_ERROR, "Too large HLS ID3 tag (%d > %"PRId64" bytes)\n",
1232  taglen, maxsize);
1233  break;
1234  }
1235 
1236  /*
1237  * Copy the id3 tag to our temporary id3 buffer.
1238  * We could read a small id3 tag directly without memcpy, but
1239  * we would still need to copy the large tags, and handling
1240  * both of those cases together with the possibility for multiple
1241  * tags would make the handling a bit complex.
1242  */
1243  pls->id3_buf = av_fast_realloc(pls->id3_buf, &pls->id3_buf_size, id3_buf_pos + taglen);
1244  if (!pls->id3_buf)
1245  break;
1246  memcpy(pls->id3_buf + id3_buf_pos, buf, tag_got_bytes);
1247  id3_buf_pos += tag_got_bytes;
1248 
1249  /* strip the intercepted bytes */
1250  *len -= tag_got_bytes;
1251  memmove(buf, buf + tag_got_bytes, *len);
1252  av_log(pls->parent, AV_LOG_DEBUG, "Stripped %d HLS ID3 bytes\n", tag_got_bytes);
1253 
1254  if (remaining > 0) {
1255  /* read the rest of the tag in */
1256  if (read_from_url(pls, seg, pls->id3_buf + id3_buf_pos, remaining) != remaining)
1257  break;
1258  id3_buf_pos += remaining;
1259  av_log(pls->parent, AV_LOG_DEBUG, "Stripped additional %d HLS ID3 bytes\n", remaining);
1260  }
1261 
1262  } else {
1263  /* no more ID3 tags */
1264  break;
1265  }
1266  }
1267 
1268  /* re-fill buffer for the caller unless EOF */
1269  if (*len >= 0 && (fill_buf || *len == 0)) {
1270  bytes = read_from_url(pls, seg, buf + *len, buf_size - *len);
1271 
1272  /* ignore error if we already had some data */
1273  if (bytes >= 0)
1274  *len += bytes;
1275  else if (*len == 0)
1276  *len = bytes;
1277  }
1278 
1279  if (pls->id3_buf) {
1280  /* Now parse all the ID3 tags */
1281  AVIOContext id3ioctx;
1282  ffio_init_context(&id3ioctx, pls->id3_buf, id3_buf_pos, 0, NULL, NULL, NULL, NULL);
1283  handle_id3(&id3ioctx, pls);
1284  }
1285 
1286  if (pls->is_id3_timestamped == -1)
1288 }
1289 
1290 static int open_input(HLSContext *c, struct playlist *pls, struct segment *seg, AVIOContext **in)
1291 {
1292  AVDictionary *opts = NULL;
1293  int ret;
1294  int is_http = 0;
1295 
1296  if (c->http_persistent)
1297  av_dict_set(&opts, "multiple_requests", "1", 0);
1298 
1299  if (seg->size >= 0) {
1300  /* try to restrict the HTTP request to the part we want
1301  * (if this is in fact a HTTP request) */
1302  av_dict_set_int(&opts, "offset", seg->url_offset, 0);
1303  av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
1304  }
1305 
1306  av_log(pls->parent, AV_LOG_VERBOSE, "HLS request for url '%s', offset %"PRId64", playlist %d\n",
1307  seg->url, seg->url_offset, pls->index);
1308 
1309  if (seg->key_type == KEY_NONE) {
1310  ret = open_url(pls->parent, in, seg->url, &c->avio_opts, opts, &is_http);
1311  } else if (seg->key_type == KEY_AES_128) {
1312  char iv[33], key[33], url[MAX_URL_SIZE];
1313  if (strcmp(seg->key, pls->key_url)) {
1314  AVIOContext *pb = NULL;
1315  if (open_url(pls->parent, &pb, seg->key, &c->avio_opts, opts, NULL) == 0) {
1316  ret = avio_read(pb, pls->key, sizeof(pls->key));
1317  if (ret != sizeof(pls->key)) {
1318  av_log(pls->parent, AV_LOG_ERROR, "Unable to read key file %s\n",
1319  seg->key);
1320  }
1321  ff_format_io_close(pls->parent, &pb);
1322  } else {
1323  av_log(pls->parent, AV_LOG_ERROR, "Unable to open key file %s\n",
1324  seg->key);
1325  }
1326  av_strlcpy(pls->key_url, seg->key, sizeof(pls->key_url));
1327  }
1328  ff_data_to_hex(iv, seg->iv, sizeof(seg->iv), 0);
1329  ff_data_to_hex(key, pls->key, sizeof(pls->key), 0);
1330  iv[32] = key[32] = '\0';
1331  if (strstr(seg->url, "://"))
1332  snprintf(url, sizeof(url), "crypto+%s", seg->url);
1333  else
1334  snprintf(url, sizeof(url), "crypto:%s", seg->url);
1335 
1336  av_dict_set(&opts, "key", key, 0);
1337  av_dict_set(&opts, "iv", iv, 0);
1338 
1339  ret = open_url(pls->parent, in, url, &c->avio_opts, opts, &is_http);
1340  if (ret < 0) {
1341  goto cleanup;
1342  }
1343  ret = 0;
1344  } else if (seg->key_type == KEY_SAMPLE_AES) {
1345  av_log(pls->parent, AV_LOG_ERROR,
1346  "SAMPLE-AES encryption is not supported yet\n");
1347  ret = AVERROR_PATCHWELCOME;
1348  }
1349  else
1350  ret = AVERROR(ENOSYS);
1351 
1352  /* Seek to the requested position. If this was a HTTP request, the offset
1353  * should already be where want it to, but this allows e.g. local testing
1354  * without a HTTP server.
1355  *
1356  * This is not done for HTTP at all as avio_seek() does internal bookkeeping
1357  * of file offset which is out-of-sync with the actual offset when "offset"
1358  * AVOption is used with http protocol, causing the seek to not be a no-op
1359  * as would be expected. Wrong offset received from the server will not be
1360  * noticed without the call, though.
1361  */
1362  if (ret == 0 && !is_http && seg->url_offset) {
1363  int64_t seekret = avio_seek(*in, seg->url_offset, SEEK_SET);
1364  if (seekret < 0) {
1365  av_log(pls->parent, AV_LOG_ERROR, "Unable to seek to offset %"PRId64" of HLS segment '%s'\n", seg->url_offset, seg->url);
1366  ret = seekret;
1367  ff_format_io_close(pls->parent, in);
1368  }
1369  }
1370 
1371 cleanup:
1372  av_dict_free(&opts);
1373  pls->cur_seg_offset = 0;
1374  return ret;
1375 }
1376 
1377 static int update_init_section(struct playlist *pls, struct segment *seg)
1378 {
1379  static const int max_init_section_size = 1024*1024;
1380  HLSContext *c = pls->parent->priv_data;
1381  int64_t sec_size;
1382  int64_t urlsize;
1383  int ret;
1384 
1385  if (seg->init_section == pls->cur_init_section)
1386  return 0;
1387 
1388  pls->cur_init_section = NULL;
1389 
1390  if (!seg->init_section)
1391  return 0;
1392 
1393  ret = open_input(c, pls, seg->init_section, &pls->input);
1394  if (ret < 0) {
1396  "Failed to open an initialization section in playlist %d\n",
1397  pls->index);
1398  return ret;
1399  }
1400 
1401  if (seg->init_section->size >= 0)
1402  sec_size = seg->init_section->size;
1403  else if ((urlsize = avio_size(pls->input)) >= 0)
1404  sec_size = urlsize;
1405  else
1406  sec_size = max_init_section_size;
1407 
1408  av_log(pls->parent, AV_LOG_DEBUG,
1409  "Downloading an initialization section of size %"PRId64"\n",
1410  sec_size);
1411 
1412  sec_size = FFMIN(sec_size, max_init_section_size);
1413 
1414  av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size);
1415 
1416  ret = read_from_url(pls, seg->init_section, pls->init_sec_buf,
1417  pls->init_sec_buf_size);
1418  ff_format_io_close(pls->parent, &pls->input);
1419 
1420  if (ret < 0)
1421  return ret;
1422 
1423  pls->cur_init_section = seg->init_section;
1424  pls->init_sec_data_len = ret;
1425  pls->init_sec_buf_read_offset = 0;
1426 
1427  /* spec says audio elementary streams do not have media initialization
1428  * sections, so there should be no ID3 timestamps */
1429  pls->is_id3_timestamped = 0;
1430 
1431  return 0;
1432 }
1433 
1435 {
1436  return pls->n_segments > 0 ?
1437  pls->segments[pls->n_segments - 1]->duration :
1438  pls->target_duration;
1439 }
1440 
1441 static int playlist_needed(struct playlist *pls)
1442 {
1443  AVFormatContext *s = pls->parent;
1444  int i, j;
1445  int stream_needed = 0;
1446  int first_st;
1447 
1448  /* If there is no context or streams yet, the playlist is needed */
1449  if (!pls->ctx || !pls->n_main_streams)
1450  return 1;
1451 
1452  /* check if any of the streams in the playlist are needed */
1453  for (i = 0; i < pls->n_main_streams; i++) {
1454  if (pls->main_streams[i]->discard < AVDISCARD_ALL) {
1455  stream_needed = 1;
1456  break;
1457  }
1458  }
1459 
1460  /* If all streams in the playlist were discarded, the playlist is not
1461  * needed (regardless of whether whole programs are discarded or not). */
1462  if (!stream_needed)
1463  return 0;
1464 
1465  /* Otherwise, check if all the programs (variants) this playlist is in are
1466  * discarded. Since all streams in the playlist are part of the same programs
1467  * we can just check the programs of the first stream. */
1468 
1469  first_st = pls->main_streams[0]->index;
1470 
1471  for (i = 0; i < s->nb_programs; i++) {
1472  AVProgram *program = s->programs[i];
1473  if (program->discard < AVDISCARD_ALL) {
1474  for (j = 0; j < program->nb_stream_indexes; j++) {
1475  if (program->stream_index[j] == first_st) {
1476  /* playlist is in an undiscarded program */
1477  return 1;
1478  }
1479  }
1480  }
1481  }
1482 
1483  /* some streams were not discarded but all the programs were */
1484  return 0;
1485 }
1486 
1487 static int read_data(void *opaque, uint8_t *buf, int buf_size)
1488 {
1489  struct playlist *v = opaque;
1490  HLSContext *c = v->parent->priv_data;
1491  int ret;
1492  int just_opened = 0;
1493  int reload_count = 0;
1494  struct segment *seg;
1495 
1496 restart:
1497  if (!v->needed)
1498  return AVERROR_EOF;
1499 
1500  if (!v->input || (c->http_persistent && v->input_read_done)) {
1501  int64_t reload_interval;
1502 
1503  /* Check that the playlist is still needed before opening a new
1504  * segment. */
1505  v->needed = playlist_needed(v);
1506 
1507  if (!v->needed) {
1508  av_log(v->parent, AV_LOG_INFO, "No longer receiving playlist %d ('%s')\n",
1509  v->index, v->url);
1510  return AVERROR_EOF;
1511  }
1512 
1513  /* If this is a live stream and the reload interval has elapsed since
1514  * the last playlist reload, reload the playlists now. */
1515  reload_interval = default_reload_interval(v);
1516 
1517 reload:
1518  reload_count++;
1519  if (reload_count > c->max_reload)
1520  return AVERROR_EOF;
1521  if (!v->finished &&
1522  av_gettime_relative() - v->last_load_time >= reload_interval) {
1523  if ((ret = parse_playlist(c, v->url, v, NULL)) < 0) {
1524  if (ret != AVERROR_EXIT)
1525  av_log(v->parent, AV_LOG_WARNING, "Failed to reload playlist %d\n",
1526  v->index);
1527  return ret;
1528  }
1529  /* If we need to reload the playlist again below (if
1530  * there's still no more segments), switch to a reload
1531  * interval of half the target duration. */
1532  reload_interval = v->target_duration / 2;
1533  }
1534  if (v->cur_seq_no < v->start_seq_no) {
1536  "skipping %"PRId64" segments ahead, expired from playlists\n",
1537  v->start_seq_no - v->cur_seq_no);
1538  v->cur_seq_no = v->start_seq_no;
1539  }
1540  if (v->cur_seq_no > v->last_seq_no) {
1541  v->last_seq_no = v->cur_seq_no;
1542  v->m3u8_hold_counters = 0;
1543  } else if (v->last_seq_no == v->cur_seq_no) {
1544  v->m3u8_hold_counters++;
1545  if (v->m3u8_hold_counters >= c->m3u8_hold_counters) {
1546  return AVERROR_EOF;
1547  }
1548  } else {
1549  av_log(v->parent, AV_LOG_WARNING, "maybe the m3u8 list sequence have been wraped.\n");
1550  }
1551  if (v->cur_seq_no >= v->start_seq_no + v->n_segments) {
1552  if (v->finished)
1553  return AVERROR_EOF;
1554  while (av_gettime_relative() - v->last_load_time < reload_interval) {
1555  if (ff_check_interrupt(c->interrupt_callback))
1556  return AVERROR_EXIT;
1557  av_usleep(100*1000);
1558  }
1559  /* Enough time has elapsed since the last reload */
1560  goto reload;
1561  }
1562 
1563  v->input_read_done = 0;
1564  seg = current_segment(v);
1565 
1566  /* load/update Media Initialization Section, if any */
1567  ret = update_init_section(v, seg);
1568  if (ret)
1569  return ret;
1570 
1571  if (c->http_multiple == 1 && v->input_next_requested) {
1572  FFSWAP(AVIOContext *, v->input, v->input_next);
1573  v->cur_seg_offset = 0;
1574  v->input_next_requested = 0;
1575  ret = 0;
1576  } else {
1577  ret = open_input(c, v, seg, &v->input);
1578  }
1579  if (ret < 0) {
1580  if (ff_check_interrupt(c->interrupt_callback))
1581  return AVERROR_EXIT;
1582  av_log(v->parent, AV_LOG_WARNING, "Failed to open segment %"PRId64" of playlist %d\n",
1583  v->cur_seq_no,
1584  v->index);
1585  v->cur_seq_no += 1;
1586  goto reload;
1587  }
1588  just_opened = 1;
1589  }
1590 
1591  if (c->http_multiple == -1) {
1592  uint8_t *http_version_opt = NULL;
1593  int r = av_opt_get(v->input, "http_version", AV_OPT_SEARCH_CHILDREN, &http_version_opt);
1594  if (r >= 0) {
1595  c->http_multiple = (!strncmp((const char *)http_version_opt, "1.1", 3) || !strncmp((const char *)http_version_opt, "2.0", 3));
1596  av_freep(&http_version_opt);
1597  }
1598  }
1599 
1600  seg = next_segment(v);
1601  if (c->http_multiple == 1 && !v->input_next_requested &&
1602  seg && seg->key_type == KEY_NONE && av_strstart(seg->url, "http", NULL)) {
1603  ret = open_input(c, v, seg, &v->input_next);
1604  if (ret < 0) {
1605  if (ff_check_interrupt(c->interrupt_callback))
1606  return AVERROR_EXIT;
1607  av_log(v->parent, AV_LOG_WARNING, "Failed to open segment %"PRId64" of playlist %d\n",
1608  v->cur_seq_no + 1,
1609  v->index);
1610  } else {
1611  v->input_next_requested = 1;
1612  }
1613  }
1614 
1616  /* Push init section out first before first actual segment */
1617  int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size);
1618  memcpy(buf, v->init_sec_buf, copy_size);
1619  v->init_sec_buf_read_offset += copy_size;
1620  return copy_size;
1621  }
1622 
1623  seg = current_segment(v);
1624  ret = read_from_url(v, seg, buf, buf_size);
1625  if (ret > 0) {
1626  if (just_opened && v->is_id3_timestamped != 0) {
1627  /* Intercept ID3 tags here, elementary audio streams are required
1628  * to convey timestamps using them in the beginning of each segment. */
1629  intercept_id3(v, buf, buf_size, &ret);
1630  }
1631 
1632  return ret;
1633  }
1634  if (c->http_persistent &&
1635  seg->key_type == KEY_NONE && av_strstart(seg->url, "http", NULL)) {
1636  v->input_read_done = 1;
1637  } else {
1638  ff_format_io_close(v->parent, &v->input);
1639  }
1640  v->cur_seq_no++;
1641 
1642  c->cur_seq_no = v->cur_seq_no;
1643 
1644  goto restart;
1645 }
1646 
1647 static void add_renditions_to_variant(HLSContext *c, struct variant *var,
1648  enum AVMediaType type, const char *group_id)
1649 {
1650  int i;
1651 
1652  for (i = 0; i < c->n_renditions; i++) {
1653  struct rendition *rend = c->renditions[i];
1654 
1655  if (rend->type == type && !strcmp(rend->group_id, group_id)) {
1656 
1657  if (rend->playlist)
1658  /* rendition is an external playlist
1659  * => add the playlist to the variant */
1660  dynarray_add(&var->playlists, &var->n_playlists, rend->playlist);
1661  else
1662  /* rendition is part of the variant main Media Playlist
1663  * => add the rendition to the main Media Playlist */
1664  dynarray_add(&var->playlists[0]->renditions,
1665  &var->playlists[0]->n_renditions,
1666  rend);
1667  }
1668  }
1669 }
1670 
1672  enum AVMediaType type)
1673 {
1674  int rend_idx = 0;
1675  int i;
1676 
1677  for (i = 0; i < pls->n_main_streams; i++) {
1678  AVStream *st = pls->main_streams[i];
1679 
1680  if (st->codecpar->codec_type != type)
1681  continue;
1682 
1683  for (; rend_idx < pls->n_renditions; rend_idx++) {
1684  struct rendition *rend = pls->renditions[rend_idx];
1685 
1686  if (rend->type != type)
1687  continue;
1688 
1689  if (rend->language[0])
1690  av_dict_set(&st->metadata, "language", rend->language, 0);
1691  if (rend->name[0])
1692  av_dict_set(&st->metadata, "comment", rend->name, 0);
1693 
1694  st->disposition |= rend->disposition;
1695  }
1696  if (rend_idx >=pls->n_renditions)
1697  break;
1698  }
1699 }
1700 
1701 /* if timestamp was in valid range: returns 1 and sets seq_no
1702  * if not: returns 0 and sets seq_no to closest segment */
1704  int64_t timestamp, int64_t *seq_no)
1705 {
1706  int i;
1707  int64_t pos = c->first_timestamp == AV_NOPTS_VALUE ?
1708  0 : c->first_timestamp;
1709 
1710  if (timestamp < pos) {
1711  *seq_no = pls->start_seq_no;
1712  return 0;
1713  }
1714 
1715  for (i = 0; i < pls->n_segments; i++) {
1716  int64_t diff = pos + pls->segments[i]->duration - timestamp;
1717  if (diff > 0) {
1718  *seq_no = pls->start_seq_no + i;
1719  return 1;
1720  }
1721  pos += pls->segments[i]->duration;
1722  }
1723 
1724  *seq_no = pls->start_seq_no + pls->n_segments - 1;
1725 
1726  return 0;
1727 }
1728 
1730 {
1731  int64_t seq_no;
1732 
1733  if (!pls->finished && !c->first_packet &&
1735  /* reload the playlist since it was suspended */
1736  parse_playlist(c, pls->url, pls, NULL);
1737 
1738  /* If playback is already in progress (we are just selecting a new
1739  * playlist) and this is a complete file, find the matching segment
1740  * by counting durations. */
1741  if (pls->finished && c->cur_timestamp != AV_NOPTS_VALUE) {
1742  find_timestamp_in_playlist(c, pls, c->cur_timestamp, &seq_no);
1743  return seq_no;
1744  }
1745 
1746  if (!pls->finished) {
1747  if (!c->first_packet && /* we are doing a segment selection during playback */
1748  c->cur_seq_no >= pls->start_seq_no &&
1749  c->cur_seq_no < pls->start_seq_no + pls->n_segments)
1750  /* While spec 3.4.3 says that we cannot assume anything about the
1751  * content at the same sequence number on different playlists,
1752  * in practice this seems to work and doing it otherwise would
1753  * require us to download a segment to inspect its timestamps. */
1754  return c->cur_seq_no;
1755 
1756  /* If this is a live stream, start live_start_index segments from the
1757  * start or end */
1758  if (c->live_start_index < 0)
1759  return pls->start_seq_no + FFMAX(pls->n_segments + c->live_start_index, 0);
1760  else
1761  return pls->start_seq_no + FFMIN(c->live_start_index, pls->n_segments - 1);
1762  }
1763 
1764  /* Otherwise just start on the first segment. */
1765  return pls->start_seq_no;
1766 }
1767 
1769 {
1770  HLSContext *c = s->priv_data;
1771  static const char * const opts[] = {
1772  "headers", "http_proxy", "user_agent", "cookies", "referer", "rw_timeout", "icy", NULL };
1773  const char * const * opt = opts;
1774  uint8_t *buf;
1775  int ret = 0;
1776 
1777  while (*opt) {
1778  if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN | AV_OPT_ALLOW_NULL, &buf) >= 0) {
1779  ret = av_dict_set(&c->avio_opts, *opt, buf,
1781  if (ret < 0)
1782  return ret;
1783  }
1784  opt++;
1785  }
1786 
1787  return ret;
1788 }
1789 
1790 static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url,
1791  int flags, AVDictionary **opts)
1792 {
1794  "A HLS playlist item '%s' referred to an external file '%s'. "
1795  "Opening this file was forbidden for security reasons\n",
1796  s->url, url);
1797  return AVERROR(EPERM);
1798 }
1799 
1800 static void add_stream_to_programs(AVFormatContext *s, struct playlist *pls, AVStream *stream)
1801 {
1802  HLSContext *c = s->priv_data;
1803  int i, j;
1804  int bandwidth = -1;
1805 
1806  for (i = 0; i < c->n_variants; i++) {
1807  struct variant *v = c->variants[i];
1808 
1809  for (j = 0; j < v->n_playlists; j++) {
1810  if (v->playlists[j] != pls)
1811  continue;
1812 
1813  av_program_add_stream_index(s, i, stream->index);
1814 
1815  if (bandwidth < 0)
1816  bandwidth = v->bandwidth;
1817  else if (bandwidth != v->bandwidth)
1818  bandwidth = -1; /* stream in multiple variants with different bandwidths */
1819  }
1820  }
1821 
1822  if (bandwidth >= 0)
1823  av_dict_set_int(&stream->metadata, "variant_bitrate", bandwidth, 0);
1824 }
1825 
1827 {
1828  int err;
1829 
1830  err = avcodec_parameters_copy(st->codecpar, ist->codecpar);
1831  if (err < 0)
1832  return err;
1833 
1834  if (pls->is_id3_timestamped) /* custom timestamps via id3 */
1835  avpriv_set_pts_info(st, 33, 1, MPEG_TIME_BASE);
1836  else
1838 
1839  // copy disposition
1840  st->disposition = ist->disposition;
1841 
1842  // copy side data
1843  for (int i = 0; i < ist->nb_side_data; i++) {
1844  const AVPacketSideData *sd_src = &ist->side_data[i];
1845  uint8_t *dst_data;
1846 
1847  dst_data = av_stream_new_side_data(st, sd_src->type, sd_src->size);
1848  if (!dst_data)
1849  return AVERROR(ENOMEM);
1850  memcpy(dst_data, sd_src->data, sd_src->size);
1851  }
1852 
1853  st->internal->need_context_update = 1;
1854 
1855  return 0;
1856 }
1857 
1858 /* add new subdemuxer streams to our context, if any */
1860 {
1861  int err;
1862 
1863  while (pls->n_main_streams < pls->ctx->nb_streams) {
1864  int ist_idx = pls->n_main_streams;
1866  AVStream *ist = pls->ctx->streams[ist_idx];
1867 
1868  if (!st)
1869  return AVERROR(ENOMEM);
1870 
1871  st->id = pls->index;
1872  dynarray_add(&pls->main_streams, &pls->n_main_streams, st);
1873 
1874  add_stream_to_programs(s, pls, st);
1875 
1876  err = set_stream_info_from_input_stream(st, pls, ist);
1877  if (err < 0)
1878  return err;
1879  }
1880 
1881  return 0;
1882 }
1883 
1885 {
1886  HLSContext *c = s->priv_data;
1887  int flag_needed = 0;
1888  int i;
1889 
1890  for (i = 0; i < c->n_playlists; i++) {
1891  struct playlist *pls = c->playlists[i];
1892 
1893  if (pls->has_noheader_flag) {
1894  flag_needed = 1;
1895  break;
1896  }
1897  }
1898 
1899  if (flag_needed)
1900  s->ctx_flags |= AVFMTCTX_NOHEADER;
1901  else
1902  s->ctx_flags &= ~AVFMTCTX_NOHEADER;
1903 }
1904 
1906 {
1907  HLSContext *c = s->priv_data;
1908 
1912 
1913  av_dict_free(&c->avio_opts);
1914  ff_format_io_close(c->ctx, &c->playlist_pb);
1915 
1916  return 0;
1917 }
1918 
1920 {
1921  HLSContext *c = s->priv_data;
1922  int ret = 0, i;
1923  int64_t highest_cur_seq_no = 0;
1924 
1925  c->ctx = s;
1926  c->interrupt_callback = &s->interrupt_callback;
1927 
1928  c->first_packet = 1;
1929  c->first_timestamp = AV_NOPTS_VALUE;
1930  c->cur_timestamp = AV_NOPTS_VALUE;
1931 
1932  if ((ret = save_avio_options(s)) < 0)
1933  goto fail;
1934 
1935  /* XXX: Some HLS servers don't like being sent the range header,
1936  in this case, need to setting http_seekable = 0 to disable
1937  the range header */
1938  av_dict_set_int(&c->avio_opts, "seekable", c->http_seekable, 0);
1939 
1940  if ((ret = parse_playlist(c, s->url, NULL, s->pb)) < 0)
1941  goto fail;
1942 
1943  if (c->n_variants == 0) {
1944  av_log(s, AV_LOG_WARNING, "Empty playlist\n");
1945  ret = AVERROR_EOF;
1946  goto fail;
1947  }
1948  /* If the playlist only contained playlists (Master Playlist),
1949  * parse each individual playlist. */
1950  if (c->n_playlists > 1 || c->playlists[0]->n_segments == 0) {
1951  for (i = 0; i < c->n_playlists; i++) {
1952  struct playlist *pls = c->playlists[i];
1953  pls->m3u8_hold_counters = 0;
1954  if ((ret = parse_playlist(c, pls->url, pls, NULL)) < 0) {
1955  av_log(s, AV_LOG_WARNING, "parse_playlist error %s [%s]\n", av_err2str(ret), pls->url);
1956  pls->broken = 1;
1957  if (c->n_playlists > 1)
1958  continue;
1959  goto fail;
1960  }
1961  }
1962  }
1963 
1964  for (i = 0; i < c->n_variants; i++) {
1965  if (c->variants[i]->playlists[0]->n_segments == 0) {
1966  av_log(s, AV_LOG_WARNING, "Empty segment [%s]\n", c->variants[i]->playlists[0]->url);
1967  c->variants[i]->playlists[0]->broken = 1;
1968  }
1969  }
1970 
1971  /* If this isn't a live stream, calculate the total duration of the
1972  * stream. */
1973  if (c->variants[0]->playlists[0]->finished) {
1974  int64_t duration = 0;
1975  for (i = 0; i < c->variants[0]->playlists[0]->n_segments; i++)
1976  duration += c->variants[0]->playlists[0]->segments[i]->duration;
1977  s->duration = duration;
1978  }
1979 
1980  /* Associate renditions with variants */
1981  for (i = 0; i < c->n_variants; i++) {
1982  struct variant *var = c->variants[i];
1983 
1984  if (var->audio_group[0])
1986  if (var->video_group[0])
1988  if (var->subtitles_group[0])
1990  }
1991 
1992  /* Create a program for each variant */
1993  for (i = 0; i < c->n_variants; i++) {
1994  struct variant *v = c->variants[i];
1995  AVProgram *program;
1996 
1997  program = av_new_program(s, i);
1998  if (!program)
1999  goto fail;
2000  av_dict_set_int(&program->metadata, "variant_bitrate", v->bandwidth, 0);
2001  }
2002 
2003  /* Select the starting segments */
2004  for (i = 0; i < c->n_playlists; i++) {
2005  struct playlist *pls = c->playlists[i];
2006 
2007  if (pls->n_segments == 0)
2008  continue;
2009 
2010  pls->cur_seq_no = select_cur_seq_no(c, pls);
2011  highest_cur_seq_no = FFMAX(highest_cur_seq_no, pls->cur_seq_no);
2012  }
2013 
2014  /* Open the demuxer for each playlist */
2015  for (i = 0; i < c->n_playlists; i++) {
2016  struct playlist *pls = c->playlists[i];
2017  char *url;
2018  ff_const59 AVInputFormat *in_fmt = NULL;
2019 
2020  if (!(pls->ctx = avformat_alloc_context())) {
2021  ret = AVERROR(ENOMEM);
2022  goto fail;
2023  }
2024 
2025  if (pls->n_segments == 0)
2026  continue;
2027 
2028  pls->index = i;
2029  pls->needed = 1;
2030  pls->parent = s;
2031 
2032  /*
2033  * If this is a live stream and this playlist looks like it is one segment
2034  * behind, try to sync it up so that every substream starts at the same
2035  * time position (so e.g. avformat_find_stream_info() will see packets from
2036  * all active streams within the first few seconds). This is not very generic,
2037  * though, as the sequence numbers are technically independent.
2038  */
2039  if (!pls->finished && pls->cur_seq_no == highest_cur_seq_no - 1 &&
2040  highest_cur_seq_no < pls->start_seq_no + pls->n_segments) {
2041  pls->cur_seq_no = highest_cur_seq_no;
2042  }
2043 
2045  if (!pls->read_buffer){
2046  ret = AVERROR(ENOMEM);
2047  avformat_free_context(pls->ctx);
2048  pls->ctx = NULL;
2049  goto fail;
2050  }
2051  ffio_init_context(&pls->pb, pls->read_buffer, INITIAL_BUFFER_SIZE, 0, pls,
2052  read_data, NULL, NULL);
2053  pls->ctx->probesize = s->probesize > 0 ? s->probesize : 1024 * 4;
2054  pls->ctx->max_analyze_duration = s->max_analyze_duration > 0 ? s->max_analyze_duration : 4 * AV_TIME_BASE;
2055  pls->ctx->interrupt_callback = s->interrupt_callback;
2056  url = av_strdup(pls->segments[0]->url);
2057  ret = av_probe_input_buffer(&pls->pb, &in_fmt, url, NULL, 0, 0);
2058 
2059  for (int n = 0; n < pls->n_segments; n++)
2060  if (ret >= 0)
2061  ret = test_segment(s, in_fmt, pls, pls->segments[n]);
2062 
2063  if (ret < 0) {
2064  /* Free the ctx - it isn't initialized properly at this point,
2065  * so avformat_close_input shouldn't be called. If
2066  * avformat_open_input fails below, it frees and zeros the
2067  * context, so it doesn't need any special treatment like this. */
2068  av_log(s, AV_LOG_ERROR, "Error when loading first segment '%s'\n", url);
2069  avformat_free_context(pls->ctx);
2070  pls->ctx = NULL;
2071  av_free(url);
2072  goto fail;
2073  }
2074  av_free(url);
2075  pls->ctx->pb = &pls->pb;
2076  pls->ctx->io_open = nested_io_open;
2077  pls->ctx->flags |= s->flags & ~AVFMT_FLAG_CUSTOM_IO;
2078 
2079  if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
2080  goto fail;
2081 
2082  ret = avformat_open_input(&pls->ctx, pls->segments[0]->url, in_fmt, NULL);
2083  if (ret < 0)
2084  goto fail;
2085 
2086  if (pls->id3_deferred_extra && pls->ctx->nb_streams == 1) {
2091  }
2092 
2093  if (pls->is_id3_timestamped == -1)
2094  av_log(s, AV_LOG_WARNING, "No expected HTTP requests have been made\n");
2095 
2096  /*
2097  * For ID3 timestamped raw audio streams we need to detect the packet
2098  * durations to calculate timestamps in fill_timing_for_id3_timestamped_stream(),
2099  * but for other streams we can rely on our user calling avformat_find_stream_info()
2100  * on us if they want to.
2101  */
2102  if (pls->is_id3_timestamped || (pls->n_renditions > 0 && pls->renditions[0]->type == AVMEDIA_TYPE_AUDIO)) {
2103  ret = avformat_find_stream_info(pls->ctx, NULL);
2104  if (ret < 0)
2105  goto fail;
2106  }
2107 
2108  pls->has_noheader_flag = !!(pls->ctx->ctx_flags & AVFMTCTX_NOHEADER);
2109 
2110  /* Create new AVStreams for each stream in this playlist */
2111  ret = update_streams_from_subdemuxer(s, pls);
2112  if (ret < 0)
2113  goto fail;
2114 
2115  /*
2116  * Copy any metadata from playlist to main streams, but do not set
2117  * event flags.
2118  */
2119  if (pls->n_main_streams)
2120  av_dict_copy(&pls->main_streams[0]->metadata, pls->ctx->metadata, 0);
2121 
2125  }
2126 
2128 
2129  return 0;
2130 fail:
2131  hls_close(s);
2132  return ret;
2133 }
2134 
2135 static int recheck_discard_flags(AVFormatContext *s, int first)
2136 {
2137  HLSContext *c = s->priv_data;
2138  int i, changed = 0;
2139  int cur_needed;
2140 
2141  /* Check if any new streams are needed */
2142  for (i = 0; i < c->n_playlists; i++) {
2143  struct playlist *pls = c->playlists[i];
2144 
2145  cur_needed = playlist_needed(c->playlists[i]);
2146 
2147  if (pls->broken) {
2148  continue;
2149  }
2150  if (cur_needed && !pls->needed) {
2151  pls->needed = 1;
2152  changed = 1;
2153  pls->cur_seq_no = select_cur_seq_no(c, pls);
2154  pls->pb.eof_reached = 0;
2155  if (c->cur_timestamp != AV_NOPTS_VALUE) {
2156  /* catch up */
2157  pls->seek_timestamp = c->cur_timestamp;
2158  pls->seek_flags = AVSEEK_FLAG_ANY;
2159  pls->seek_stream_index = -1;
2160  }
2161  av_log(s, AV_LOG_INFO, "Now receiving playlist %d, segment %"PRId64"\n", i, pls->cur_seq_no);
2162  } else if (first && !cur_needed && pls->needed) {
2163  ff_format_io_close(pls->parent, &pls->input);
2164  pls->input_read_done = 0;
2165  ff_format_io_close(pls->parent, &pls->input_next);
2166  pls->input_next_requested = 0;
2167  pls->needed = 0;
2168  changed = 1;
2169  av_log(s, AV_LOG_INFO, "No longer receiving playlist %d\n", i);
2170  }
2171  }
2172  return changed;
2173 }
2174 
2176 {
2177  if (pls->id3_offset >= 0) {
2178  pls->pkt->dts = pls->id3_mpegts_timestamp +
2179  av_rescale_q(pls->id3_offset,
2180  pls->ctx->streams[pls->pkt->stream_index]->time_base,
2182  if (pls->pkt->duration)
2183  pls->id3_offset += pls->pkt->duration;
2184  else
2185  pls->id3_offset = -1;
2186  } else {
2187  /* there have been packets with unknown duration
2188  * since the last id3 tag, should not normally happen */
2189  pls->pkt->dts = AV_NOPTS_VALUE;
2190  }
2191 
2192  if (pls->pkt->duration)
2193  pls->pkt->duration = av_rescale_q(pls->pkt->duration,
2194  pls->ctx->streams[pls->pkt->stream_index]->time_base,
2196 
2197  pls->pkt->pts = AV_NOPTS_VALUE;
2198 }
2199 
2200 static AVRational get_timebase(struct playlist *pls)
2201 {
2202  if (pls->is_id3_timestamped)
2203  return MPEG_TIME_BASE_Q;
2204 
2205  return pls->ctx->streams[pls->pkt->stream_index]->time_base;
2206 }
2207 
2208 static int compare_ts_with_wrapdetect(int64_t ts_a, struct playlist *pls_a,
2209  int64_t ts_b, struct playlist *pls_b)
2210 {
2211  int64_t scaled_ts_a = av_rescale_q(ts_a, get_timebase(pls_a), MPEG_TIME_BASE_Q);
2212  int64_t scaled_ts_b = av_rescale_q(ts_b, get_timebase(pls_b), MPEG_TIME_BASE_Q);
2213 
2214  return av_compare_mod(scaled_ts_a, scaled_ts_b, 1LL << 33);
2215 }
2216 
2218 {
2219  HLSContext *c = s->priv_data;
2220  int ret, i, minplaylist = -1;
2221 
2222  recheck_discard_flags(s, c->first_packet);
2223  c->first_packet = 0;
2224 
2225  for (i = 0; i < c->n_playlists; i++) {
2226  struct playlist *pls = c->playlists[i];
2227  /* Make sure we've got one buffered packet from each open playlist
2228  * stream */
2229  if (pls->needed && !pls->pkt->data) {
2230  while (1) {
2231  int64_t ts_diff;
2232  AVRational tb;
2233  ret = av_read_frame(pls->ctx, pls->pkt);
2234  if (ret < 0) {
2235  if (!avio_feof(&pls->pb) && ret != AVERROR_EOF)
2236  return ret;
2237  break;
2238  } else {
2239  /* stream_index check prevents matching picture attachments etc. */
2240  if (pls->is_id3_timestamped && pls->pkt->stream_index == 0) {
2241  /* audio elementary streams are id3 timestamped */
2243  }
2244 
2245  if (c->first_timestamp == AV_NOPTS_VALUE &&
2246  pls->pkt->dts != AV_NOPTS_VALUE)
2247  c->first_timestamp = av_rescale_q(pls->pkt->dts,
2249  }
2250 
2251  if (pls->seek_timestamp == AV_NOPTS_VALUE)
2252  break;
2253 
2254  if (pls->seek_stream_index < 0 ||
2255  pls->seek_stream_index == pls->pkt->stream_index) {
2256 
2257  if (pls->pkt->dts == AV_NOPTS_VALUE) {
2259  break;
2260  }
2261 
2262  tb = get_timebase(pls);
2263  ts_diff = av_rescale_rnd(pls->pkt->dts, AV_TIME_BASE,
2264  tb.den, AV_ROUND_DOWN) -
2265  pls->seek_timestamp;
2266  if (ts_diff >= 0 && (pls->seek_flags & AVSEEK_FLAG_ANY ||
2267  pls->pkt->flags & AV_PKT_FLAG_KEY)) {
2269  break;
2270  }
2271  }
2272  av_packet_unref(pls->pkt);
2273  }
2274  }
2275  /* Check if this stream has the packet with the lowest dts */
2276  if (pls->pkt->data) {
2277  struct playlist *minpls = minplaylist < 0 ?
2278  NULL : c->playlists[minplaylist];
2279  if (minplaylist < 0) {
2280  minplaylist = i;
2281  } else {
2282  int64_t dts = pls->pkt->dts;
2283  int64_t mindts = minpls->pkt->dts;
2284 
2285  if (dts == AV_NOPTS_VALUE ||
2286  (mindts != AV_NOPTS_VALUE && compare_ts_with_wrapdetect(dts, pls, mindts, minpls) < 0))
2287  minplaylist = i;
2288  }
2289  }
2290  }
2291 
2292  /* If we got a packet, return it */
2293  if (minplaylist >= 0) {
2294  struct playlist *pls = c->playlists[minplaylist];
2295  AVStream *ist;
2296  AVStream *st;
2297 
2298  ret = update_streams_from_subdemuxer(s, pls);
2299  if (ret < 0) {
2300  av_packet_unref(pls->pkt);
2301  return ret;
2302  }
2303 
2304  // If sub-demuxer reports updated metadata, copy it to the first stream
2305  // and set its AVSTREAM_EVENT_FLAG_METADATA_UPDATED flag.
2307  if (pls->n_main_streams) {
2308  st = pls->main_streams[0];
2309  av_dict_copy(&st->metadata, pls->ctx->metadata, 0);
2311  }
2313  }
2314 
2315  /* check if noheader flag has been cleared by the subdemuxer */
2316  if (pls->has_noheader_flag && !(pls->ctx->ctx_flags & AVFMTCTX_NOHEADER)) {
2317  pls->has_noheader_flag = 0;
2319  }
2320 
2321  if (pls->pkt->stream_index >= pls->n_main_streams) {
2322  av_log(s, AV_LOG_ERROR, "stream index inconsistency: index %d, %d main streams, %d subdemuxer streams\n",
2323  pls->pkt->stream_index, pls->n_main_streams, pls->ctx->nb_streams);
2324  av_packet_unref(pls->pkt);
2325  return AVERROR_BUG;
2326  }
2327 
2328  ist = pls->ctx->streams[pls->pkt->stream_index];
2329  st = pls->main_streams[pls->pkt->stream_index];
2330 
2331  av_packet_move_ref(pkt, pls->pkt);
2332  pkt->stream_index = st->index;
2333 
2334  if (pkt->dts != AV_NOPTS_VALUE)
2335  c->cur_timestamp = av_rescale_q(pkt->dts,
2336  ist->time_base,
2337  AV_TIME_BASE_Q);
2338 
2339  /* There may be more situations where this would be useful, but this at least
2340  * handles newly probed codecs properly (i.e. request_probe by mpegts). */
2341  if (ist->codecpar->codec_id != st->codecpar->codec_id) {
2342  ret = set_stream_info_from_input_stream(st, pls, ist);
2343  if (ret < 0) {
2344  return ret;
2345  }
2346  }
2347 
2348  return 0;
2349  }
2350  return AVERROR_EOF;
2351 }
2352 
2353 static int hls_read_seek(AVFormatContext *s, int stream_index,
2354  int64_t timestamp, int flags)
2355 {
2356  HLSContext *c = s->priv_data;
2357  struct playlist *seek_pls = NULL;
2358  int i, j;
2359  int stream_subdemuxer_index;
2360  int64_t first_timestamp, seek_timestamp, duration;
2361  int64_t seq_no;
2362 
2363  if ((flags & AVSEEK_FLAG_BYTE) || (c->ctx->ctx_flags & AVFMTCTX_UNSEEKABLE))
2364  return AVERROR(ENOSYS);
2365 
2366  first_timestamp = c->first_timestamp == AV_NOPTS_VALUE ?
2367  0 : c->first_timestamp;
2368 
2370  s->streams[stream_index]->time_base.den,
2373 
2374  duration = s->duration == AV_NOPTS_VALUE ?
2375  0 : s->duration;
2376 
2377  if (0 < duration && duration < seek_timestamp - first_timestamp)
2378  return AVERROR(EIO);
2379 
2380  /* find the playlist with the specified stream */
2381  for (i = 0; i < c->n_playlists; i++) {
2382  struct playlist *pls = c->playlists[i];
2383  for (j = 0; j < pls->n_main_streams; j++) {
2384  if (pls->main_streams[j] == s->streams[stream_index]) {
2385  seek_pls = pls;
2386  stream_subdemuxer_index = j;
2387  break;
2388  }
2389  }
2390  }
2391  /* check if the timestamp is valid for the playlist with the
2392  * specified stream index */
2393  if (!seek_pls || !find_timestamp_in_playlist(c, seek_pls, seek_timestamp, &seq_no))
2394  return AVERROR(EIO);
2395 
2396  /* set segment now so we do not need to search again below */
2397  seek_pls->cur_seq_no = seq_no;
2398  seek_pls->seek_stream_index = stream_subdemuxer_index;
2399 
2400  for (i = 0; i < c->n_playlists; i++) {
2401  /* Reset reading */
2402  struct playlist *pls = c->playlists[i];
2403  ff_format_io_close(pls->parent, &pls->input);
2404  pls->input_read_done = 0;
2405  ff_format_io_close(pls->parent, &pls->input_next);
2406  pls->input_next_requested = 0;
2407  av_packet_unref(pls->pkt);
2408  pls->pb.eof_reached = 0;
2409  /* Clear any buffered data */
2410  pls->pb.buf_end = pls->pb.buf_ptr = pls->pb.buffer;
2411  /* Reset the pos, to let the mpegts demuxer know we've seeked. */
2412  pls->pb.pos = 0;
2413  /* Flush the packet queue of the subdemuxer. */
2414  ff_read_frame_flush(pls->ctx);
2415 
2417  pls->seek_flags = flags;
2418 
2419  if (pls != seek_pls) {
2420  /* set closest segment seq_no for playlists not handled above */
2422  /* seek the playlist to the given position without taking
2423  * keyframes into account since this playlist does not have the
2424  * specified stream where we should look for the keyframes */
2425  pls->seek_stream_index = -1;
2426  pls->seek_flags |= AVSEEK_FLAG_ANY;
2427  }
2428  }
2429 
2430  c->cur_timestamp = seek_timestamp;
2431 
2432  return 0;
2433 }
2434 
2435 static int hls_probe(const AVProbeData *p)
2436 {
2437  /* Require #EXTM3U at the start, and either one of the ones below
2438  * somewhere for a proper match. */
2439  if (strncmp(p->buf, "#EXTM3U", 7))
2440  return 0;
2441 
2442  if (strstr(p->buf, "#EXT-X-STREAM-INF:") ||
2443  strstr(p->buf, "#EXT-X-TARGETDURATION:") ||
2444  strstr(p->buf, "#EXT-X-MEDIA-SEQUENCE:"))
2445  return AVPROBE_SCORE_MAX;
2446  return 0;
2447 }
2448 
2449 #define OFFSET(x) offsetof(HLSContext, x)
2450 #define FLAGS AV_OPT_FLAG_DECODING_PARAM
2451 static const AVOption hls_options[] = {
2452  {"live_start_index", "segment index to start live streams at (negative values are from the end)",
2453  OFFSET(live_start_index), AV_OPT_TYPE_INT, {.i64 = -3}, INT_MIN, INT_MAX, FLAGS},
2454  {"allowed_extensions", "List of file extensions that hls is allowed to access",
2455  OFFSET(allowed_extensions), AV_OPT_TYPE_STRING,
2456  {.str = "3gp,aac,avi,ac3,eac3,flac,mkv,m3u8,m4a,m4s,m4v,mpg,mov,mp2,mp3,mp4,mpeg,mpegts,ogg,ogv,oga,ts,vob,vtt,wav,webvtt"
2457  ",cmfv,cmfa" // Ticket11526 www.nicovideo.jp
2458  ",ec3" // part of Ticket11435 (Elisa Viihde (Finnish online recording service))
2459  ",fmp4" // https://github.com/yt-dlp/yt-dlp/issues/12700
2460  },
2461  INT_MIN, INT_MAX, FLAGS},
2462  {"allowed_segment_extensions", "List of file extensions that hls is allowed to access",
2463  OFFSET(allowed_segment_extensions), AV_OPT_TYPE_STRING,
2464  {.str = "3gp,aac,avi,ac3,eac3,flac,mkv,m3u8,m4a,m4s,m4v,mpg,mov,mp2,mp3,mp4,mpeg,mpegts,ogg,ogv,oga,ts,vob,vtt,wav,webvtt"
2465  ",cmfv,cmfa" // Ticket11526 www.nicovideo.jp
2466  ",ec3" // part of Ticket11435 (Elisa Viihde (Finnish online recording service))
2467  ",fmp4" // https://github.com/yt-dlp/yt-dlp/issues/12700
2468  ",html" // https://flash1.bogulus.cfd/
2469  },
2470  INT_MIN, INT_MAX, FLAGS},
2471  {"extension_picky", "Be picky with all extensions matching",
2472  OFFSET(extension_picky), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS},
2473  {"max_reload", "Maximum number of times a insufficient list is attempted to be reloaded",
2474  OFFSET(max_reload), AV_OPT_TYPE_INT, {.i64 = 100}, 0, INT_MAX, FLAGS},
2475  {"m3u8_hold_counters", "The maximum number of times to load m3u8 when it refreshes without new segments",
2476  OFFSET(m3u8_hold_counters), AV_OPT_TYPE_INT, {.i64 = 1000}, 0, INT_MAX, FLAGS},
2477  {"http_persistent", "Use persistent HTTP connections",
2478  OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS },
2479  {"http_multiple", "Use multiple HTTP connections for fetching segments",
2480  OFFSET(http_multiple), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, FLAGS},
2481  {"http_seekable", "Use HTTP partial requests, 0 = disable, 1 = enable, -1 = auto",
2482  OFFSET(http_seekable), AV_OPT_TYPE_BOOL, { .i64 = -1}, -1, 1, FLAGS},
2483  {NULL}
2484 };
2485 
2486 static const AVClass hls_class = {
2487  .class_name = "hls demuxer",
2488  .item_name = av_default_item_name,
2489  .option = hls_options,
2490  .version = LIBAVUTIL_VERSION_INT,
2491 };
2492 
2494  .name = "hls",
2495  .long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
2496  .priv_class = &hls_class,
2497  .priv_data_size = sizeof(HLSContext),
2499  .read_probe = hls_probe,
2502  .read_close = hls_close,
2504 };
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) #define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac) { } void ff_audio_convert_free(AudioConvert **ac) { if(! *ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);} AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map) { AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;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);return NULL;} return ac;} 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;} else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->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);return ac;} int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in) { int use_generic=1;int len=in->nb_samples;int p;if(ac->dc) { av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
uint8_t
simple assert() macros that are a bit more flexible than ISO C assert().
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
#define FF_COMPLIANCE_EXPERIMENTAL
Allow nonstandardized experimental things.
Definition: avcodec.h:1610
Main libavformat public API header.
#define AVFMT_EVENT_FLAG_METADATA_UPDATED
Definition: avformat.h:1562
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:453
#define AV_DISPOSITION_HEARING_IMPAIRED
stream for hearing impaired audiences
Definition: avformat.h:831
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1177
#define AVFMT_TS_DISCONT
Format allows timestamp discontinuities.
Definition: avformat.h:464
#define AVSEEK_FLAG_BYTE
seeking based on position in bytes
Definition: avformat.h:2416
#define AVFMT_NOGENSEARCH
Format does not allow to fall back on generic search.
Definition: avformat.h:469
#define AVSEEK_FLAG_ANY
seek to any frame, even non-keyframes
Definition: avformat.h:2417
#define ff_const59
The ff_const59 define is not part of the public API and will be removed without further warning.
Definition: avformat.h:533
#define AVFMTCTX_UNSEEKABLE
signal that the stream is definitely not seekable, and attempts to call the seek function will fail.
Definition: avformat.h:1179
#define AV_DISPOSITION_FORCED
Track should be used during playback by default.
Definition: avformat.h:830
#define AV_DISPOSITION_VISUAL_IMPAIRED
stream for visual impaired audiences
Definition: avformat.h:832
#define AVSTREAM_EVENT_FLAG_METADATA_UPDATED
Definition: avformat.h:999
#define AVFMT_FLAG_CUSTOM_IO
The caller has supplied a custom AVIOContext, don't avio_close() it.
Definition: avformat.h:1371
#define AVSEEK_FLAG_BACKWARD
Definition: avformat.h:2415
#define AV_DISPOSITION_DEFAULT
Definition: avformat.h:818
int ff_check_interrupt(AVIOInterruptCB *cb)
Check if the user has requested to interrupt a blocking function associated with cb.
Definition: avio.c:661
const char * avio_find_protocol_name(const char *url)
Return the name of the protocol that will handle the passed URL.
Definition: avio.c:470
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:253
#define AVIO_FLAG_READ
read-only
Definition: avio.h:674
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:342
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:364
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:633
URLContext * ffio_geturlcontext(AVIOContext *s)
Return the URLContext associated with the AVIOContext.
Definition: aviobuf.c:979
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:88
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
int ff_get_chomp_line(AVIOContext *s, char *buf, int maxlen)
Same as ff_get_line but strip the white-space characters in the text tail.
Definition: aviobuf.c:806
#define AV_RB64
Definition: intreadwrite.h:164
#define flags(name, subs,...)
Definition: cbs_av1.c:572
#define s(width, name)
Definition: cbs_vp9.c:257
#define fail()
Definition: checkasm.h:133
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
Definition: codec_par.c:72
#define FFSWAP(type, a, b)
Definition: common.h:108
#define FFMIN(a, b)
Definition: common.h:105
#define FFMAX(a, b)
Definition: common.h:103
#define NULL
Definition: coverity.c:32
long long int64_t
Definition: coverity.c:34
Public dictionary API.
const OptionDef options[]
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:545
static av_cold void cleanup(FlashSV2Context *s)
Definition: flashsv2enc.c:127
int ff_match_url_ext(const char *url, const char *extensions)
Return a positive value if the given url has one of the given extensions, negative AVERROR on error,...
Definition: format.c:51
#define AV_OPT_SEARCH_CHILDREN
Search in possible children of the given object first.
Definition: opt.h:560
#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:574
@ AV_OPT_TYPE_INT
Definition: opt.h:225
@ AV_OPT_TYPE_BOOL
Definition: opt.h:242
@ AV_OPT_TYPE_STRING
Definition: opt.h:229
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding.
Definition: avcodec.h:215
@ AVDISCARD_ALL
discard all
Definition: avcodec.h:236
void av_packet_free(AVPacket **pkt)
Free the packet, if the packet is reference counted, it will be unreferenced first.
Definition: avpacket.c:75
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:634
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:410
void av_packet_move_ref(AVPacket *dst, AVPacket *src)
Move every field in src to dst and reset src.
Definition: avpacket.c:690
AVPacket * av_packet_alloc(void)
Allocate an AVPacket and set its fields to default values.
Definition: avpacket.c:64
uint8_t * av_stream_new_side_data(AVStream *stream, enum AVPacketSideDataType type, size_t size)
Allocate new information from stream.
AVProgram * av_new_program(AVFormatContext *s, int id)
Definition: utils.c:4607
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:4436
AVFormatContext * avformat_alloc_context(void)
Allocate an AVFormatContext.
Definition: options.c:211
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4509
int av_probe_input_buffer(AVIOContext *pb, ff_const59 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:339
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1741
void av_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
Read packets of a media file to get stream information.
Definition: utils.c:3602
void avformat_close_input(AVFormatContext **s)
Close an opened input AVFormatContext.
Definition: utils.c:4481
int avformat_open_input(AVFormatContext **ps, const char *url, ff_const59 AVInputFormat *fmt, AVDictionary **options)
Open an input stream and read the header.
Definition: utils.c:512
int avformat_queue_attached_pictures(AVFormatContext *s)
Definition: utils.c:454
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:38
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values.
Definition: dict.c:203
#define AV_DICT_IGNORE_SUFFIX
Return first entry in a dictionary whose first part corresponds to the search key,...
Definition: dict.h:70
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_DICT_DONT_STRDUP_VAL
Take ownership of a value that's been allocated with av_malloc() or another memory allocation functio...
Definition: dict.h:74
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
#define AV_DICT_MATCH_CASE
Only get an entry with exact-case key match.
Definition: dict.h:69
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 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
#define AVERROR_EXIT
Immediate exit was requested; the called function should not be restarted.
Definition: error.h:56
#define AVERROR_PROTOCOL_NOT_FOUND
Protocol not found.
Definition: error.h:63
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:50
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define av_err2str(errnum)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: error.h:119
#define AVERROR(e)
Definition: error.h:43
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:215
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:210
#define AV_LOG_INFO
Standard information.
Definition: log.h:205
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
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
@ AV_ROUND_DOWN
Round toward -infinity.
Definition: mathematics.h:82
@ AV_ROUND_UP
Round toward +infinity.
Definition: mathematics.h:83
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
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
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:502
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:237
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:253
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:478
AVMediaType
Definition: avutil.h:199
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
@ AVMEDIA_TYPE_SUBTITLE
Definition: avutil.h:204
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
@ AVMEDIA_TYPE_UNKNOWN
Usually treated as AVMEDIA_TYPE_DATA.
Definition: avutil.h:200
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:186
int av_match_name(const char *name, const char *names)
Match instances of a name in a comma-separated list of names.
Definition: avstring.c:353
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
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
int av_strncasecmp(const char *a, const char *b, size_t n)
Locale-independent case-insensitive compare.
Definition: avstring.c:225
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:254
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
int av_opt_get(void *obj, const char *name, int search_flags, uint8_t **out_val)
Definition: opt.c:779
static void update_noheader_flag(AVFormatContext *s)
Definition: hls.c:1884
#define MAX_CHARACTERISTICS_LEN
Definition: hls.c:45
static void handle_variant_args(struct variant_info *info, const char *key, int key_len, char **dest, int *dest_len)
Definition: hls.c:359
#define MAX_FIELD_LEN
Definition: hls.c:44
static int open_input(HLSContext *c, struct playlist *pls, struct segment *seg, AVIOContext **in)
Definition: hls.c:1290
static int update_init_section(struct playlist *pls, struct segment *seg)
Definition: hls.c:1377
static struct segment * next_segment(struct playlist *pls)
Definition: hls.c:1068
static struct rendition * new_rendition(HLSContext *c, struct rendition_info *info, const char *url_base)
Definition: hls.c:471
static int read_from_url(struct playlist *pls, struct segment *seg, uint8_t *buf, int buf_size)
Definition: hls.c:1076
#define INITIAL_BUFFER_SIZE
Definition: hls.c:42
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:447
static int hls_read_header(AVFormatContext *s)
Definition: hls.c:1919
static struct segment * current_segment(struct playlist *pls)
Definition: hls.c:1063
static int read_data(void *opaque, uint8_t *buf, int buf_size)
Definition: hls.c:1487
static int set_stream_info_from_input_stream(AVStream *st, struct playlist *pls, AVStream *ist)
Definition: hls.c:1826
static int test_segment(AVFormatContext *s, const AVInputFormat *in_fmt, struct playlist *pls, struct segment *seg)
Definition: hls.c:714
static void free_segment_list(struct playlist *pls)
Definition: hls.c:230
#define MPEG_TIME_BASE
Definition: hls.c:47
static void handle_rendition_args(struct rendition_info *info, const char *key, int key_len, char **dest, int *dest_len)
Definition: hls.c:555
static void free_init_section_list(struct playlist *pls)
Definition: hls.c:237
static void add_renditions_to_variant(HLSContext *c, struct variant *var, enum AVMediaType type, const char *group_id)
Definition: hls.c:1647
static int hls_probe(const AVProbeData *p)
Definition: hls.c:2435
static int ensure_playlist(HLSContext *c, struct playlist **pls, const char *url)
Definition: hls.c:599
PlaylistType
Definition: hls.c:82
@ PLS_TYPE_UNSPECIFIED
Definition: hls.c:83
@ PLS_TYPE_VOD
Definition: hls.c:85
@ PLS_TYPE_EVENT
Definition: hls.c:84
static int recheck_discard_flags(AVFormatContext *s, int first)
Definition: hls.c:2135
static AVRational get_timebase(struct playlist *pls)
Definition: hls.c:2200
static void fill_timing_for_id3_timestamped_stream(struct playlist *pls)
Definition: hls.c:2175
static void parse_id3(AVFormatContext *s, AVIOContext *pb, AVDictionary **metadata, int64_t *dts, ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta **extra_meta)
Definition: hls.c:1093
static void handle_key_args(struct key_info *info, const char *key, int key_len, char **dest, int *dest_len)
Definition: hls.c:383
static int64_t default_reload_interval(struct playlist *pls)
Definition: hls.c:1434
static int find_timestamp_in_playlist(HLSContext *c, struct playlist *pls, int64_t timestamp, int64_t *seq_no)
Definition: hls.c:1703
static int open_url_keepalive(AVFormatContext *s, AVIOContext **pb, const char *url, AVDictionary **options)
Definition: hls.c:609
static void add_metadata_from_renditions(AVFormatContext *s, struct playlist *pls, enum AVMediaType type)
Definition: hls.c:1671
static int update_streams_from_subdemuxer(AVFormatContext *s, struct playlist *pls)
Definition: hls.c:1859
#define FLAGS
Definition: hls.c:2450
static void add_stream_to_programs(AVFormatContext *s, struct playlist *pls, AVStream *stream)
Definition: hls.c:1800
static int hls_close(AVFormatContext *s)
Definition: hls.c:1905
static struct playlist * new_playlist(HLSContext *c, const char *url, const char *base)
Definition: hls.c:299
static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **opts)
Definition: hls.c:1790
static void handle_id3(AVIOContext *pb, struct playlist *pls)
Definition: hls.c:1148
static void free_segment_dynarray(struct segment **segments, int n_segments)
Definition: hls.c:220
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:2208
static struct segment * new_init_section(struct playlist *pls, struct init_section_info *info, const char *url_base)
Definition: hls.c:403
static int parse_playlist(HLSContext *c, const char *url, struct playlist *pls, AVIOContext *in)
Definition: hls.c:758
#define MPEG_TIME_BASE_Q
Definition: hls.c:48
KeyType
Definition: hls.c:62
@ KEY_SAMPLE_AES
Definition: hls.c:65
@ KEY_NONE
Definition: hls.c:63
@ KEY_AES_128
Definition: hls.c:64
static int hls_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: hls.c:2217
static int save_avio_options(AVFormatContext *s)
Definition: hls.c:1768
static const AVOption hls_options[]
Definition: hls.c:2451
static void free_rendition_list(HLSContext *c)
Definition: hls.c:290
static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url, AVDictionary **opts, AVDictionary *opts2, int *is_http_out)
Definition: hls.c:627
#define OFFSET(x)
Definition: hls.c:2449
static int id3_has_changed_values(struct playlist *pls, AVDictionary *metadata, ID3v2ExtraMetaAPIC *apic)
Definition: hls.c:1119
static void free_playlist_list(HLSContext *c)
Definition: hls.c:249
static const AVClass hls_class
Definition: hls.c:2486
static int64_t select_cur_seq_no(HLSContext *c, struct playlist *pls)
Definition: hls.c:1729
static struct variant * new_variant(HLSContext *c, struct variant_info *info, const char *url, const char *base)
Definition: hls.c:333
static void intercept_id3(struct playlist *pls, uint8_t *buf, int buf_size, int *len)
Definition: hls.c:1190
static int playlist_needed(struct playlist *pls)
Definition: hls.c:1441
static void free_variant_list(HLSContext *c)
Definition: hls.c:278
AVInputFormat ff_hls_demuxer
Definition: hls.c:2493
static int hls_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: hls.c:2353
int ff_http_do_new_request2(URLContext *h, const char *uri, AVDictionary **opts)
Send a new HTTP request, reusing the old connection.
Definition: http.c:396
cl_device_type type
const char * key
int ff_id3v2_tag_len(const uint8_t *buf)
Get the length of an ID3v2 tag.
Definition: id3v2.c:156
int ff_id3v2_match(const uint8_t *buf, const char *magic)
Detect ID3v2 Header.
Definition: id3v2.c:143
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1126
int ff_id3v2_parse_priv_dict(AVDictionary **metadata, ID3v2ExtraMeta *extra_meta)
Parse PRIV tags into a dictionary.
Definition: id3v2.c:1233
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:1142
int ff_id3v2_parse_priv(AVFormatContext *s, ID3v2ExtraMeta *extra_meta)
Add metadata for all PRIV tags in the ID3v2 header.
Definition: id3v2.c:1273
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:1114
#define ID3v2_DEFAULT_MAGIC
Default magic bytes for ID3v2 header: "ID3".
Definition: id3v2.h:35
#define ID3v2_HEADER_SIZE
Definition: id3v2.h:30
int i
Definition: input.c:407
#define AV_WB64(p, v)
Definition: intreadwrite.h:433
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:511
int ff_copy_whiteblacklists(AVFormatContext *dst, const AVFormatContext *src)
Copies the whilelists from one context to the other.
Definition: utils.c:160
int ff_hex_to_data(uint8_t *data, const char *p)
Parse a string of hexadecimal strings.
Definition: utils.c:4917
#define dynarray_add(tab, nb_ptr, elem)
Definition: internal.h:355
char * ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase)
Definition: utils.c:4896
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:4945
#define MAX_URL_SIZE
Definition: internal.h:30
void ff_read_frame_flush(AVFormatContext *s)
Flush the frame reader.
Definition: utils.c:1892
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5692
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:4975
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
AVOptions.
#define tb
Definition: regdef.h:68
#define snprintf
Definition: snprintf.h:34
unsigned int pos
Definition: spdifenc.c:412
int size
Size of data in bytes.
Definition: buffer.h:97
uint8_t * data
The data buffer.
Definition: buffer.h:92
Describe the class of an AVClass context structure.
Definition: log.h:67
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
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
char * key
Definition: dict.h:82
char * value
Definition: dict.h:83
Format I/O context.
Definition: avformat.h:1232
int event_flags
Flags indicating events happening on the file, a combination of AVFMT_EVENT_FLAG_*.
Definition: avformat.h:1555
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1288
AVIOContext * pb
I/O context.
Definition: avformat.h:1274
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1474
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1363
int64_t max_analyze_duration
Maximum duration (in AV_TIME_BASE units) of the data read from input in avformat_find_stream_info().
Definition: avformat.h:1408
int ctx_flags
Flags signalling stream properties.
Definition: avformat.h:1281
ff_const59 struct AVInputFormat * iformat
The input container format.
Definition: avformat.h:1244
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1512
void * priv_data
Format private data.
Definition: avformat.h:1260
int64_t probesize
Maximum size of the data read from input for determining the input container format.
Definition: avformat.h:1400
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1300
int(* io_open)(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **options)
A callback for opening new IO streams.
Definition: avformat.h:1828
Bytestream IO Context.
Definition: avio.h:161
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
unsigned char * buf_ptr
Current position in the buffer.
Definition: avio.h:228
int64_t pos
position in the file of the current buffer
Definition: avio.h:238
unsigned char * buffer
Start of the buffer.
Definition: avio.h:226
int eof_reached
true if was unable to read due to error or eof
Definition: avio.h:239
Callback for checking whether to abort blocking functions.
Definition: avio.h:58
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:645
const char * extensions
If extensions are defined, then no probe is done.
Definition: avformat.h:666
AVOption.
Definition: opt.h:248
uint8_t * data
Definition: packet.h:307
enum AVPacketSideDataType type
Definition: packet.h:313
size_t size
Definition: packet.h:311
This structure stores compressed data.
Definition: packet.h:346
int stream_index
Definition: packet.h:371
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:375
int size
Definition: packet.h:370
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:387
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:362
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: packet.h:368
uint8_t * data
Definition: packet.h:369
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:443
New fields can be added to the end with minor version bumps.
Definition: avformat.h:1150
unsigned int nb_stream_indexes
Definition: avformat.h:1155
unsigned int * stream_index
Definition: avformat.h:1154
enum AVDiscard discard
selects which program to discard and which to feed to the caller
Definition: avformat.h:1153
AVDictionary * metadata
Definition: avformat.h:1156
Rational number (pair of numerator and denominator).
Definition: rational.h:58
int num
Numerator.
Definition: rational.h:59
int den
Denominator.
Definition: rational.h:60
int need_context_update
Whether the internal avctx needs to be updated from codecpar (after a late change to codecpar)
Definition: internal.h:200
Stream structure.
Definition: avformat.h:873
AVPacketSideData * side_data
An array of side data that applies to the whole stream (i.e.
Definition: avformat.h:975
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1038
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:928
AVDictionary * metadata
Definition: avformat.h:937
int id
Format-specific stream ID.
Definition: avformat.h:880
int index
stream index in AVFormatContext
Definition: avformat.h:874
int pts_wrap_bits
number of bits in pts (used for wrapping control)
Definition: avformat.h:1055
AVPacket attached_pic
For streams with AV_DISPOSITION_ATTACHED_PIC disposition, this packet will contain the attached pictu...
Definition: avformat.h:955
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.
Definition: avformat.h:902
int event_flags
Flags indicating events happening on the stream, a combination of AVSTREAM_EVENT_FLAG_*.
Definition: avformat.h:992
int nb_side_data
The number of elements in the AVStream.side_data array.
Definition: avformat.h:979
AVStreamInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1113
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:926
int n_renditions
Definition: hls.c:199
int http_multiple
Definition: hls.c:215
struct rendition ** renditions
Definition: hls.c:200
int m3u8_hold_counters
Definition: hls.c:203
AVIOInterruptCB * interrupt_callback
Definition: hls.c:208
AVDictionary * avio_opts
Definition: hls.c:209
char * allowed_segment_extensions
Definition: hls.c:211
int n_variants
Definition: hls.c:195
int http_persistent
Definition: hls.c:214
int extension_picky
Definition: hls.c:212
AVFormatContext * ctx
Definition: hls.c:194
int64_t cur_seq_no
Definition: hls.c:202
int live_start_index
Definition: hls.c:204
AVIOContext * playlist_pb
Definition: hls.c:217
int first_packet
Definition: hls.c:205
int max_reload
Definition: hls.c:213
int n_playlists
Definition: hls.c:197
int64_t cur_timestamp
Definition: hls.c:207
struct variant ** variants
Definition: hls.c:196
int64_t first_timestamp
Definition: hls.c:206
struct playlist ** playlists
Definition: hls.c:198
char * allowed_extensions
Definition: hls.c:210
int http_seekable
Definition: hls.c:216
AVBufferRef * buf
Definition: id3v2.h:66
uint8_t * data
Definition: id3v2.h:74
uint32_t datasize
Definition: id3v2.h:75
uint8_t * owner
Definition: id3v2.h:73
ID3v2ExtraMetaPRIV priv
Definition: id3v2.h:91
ID3v2ExtraMetaAPIC apic
Definition: id3v2.h:88
union ID3v2ExtraMeta::@258 data
const char * tag
Definition: id3v2.h:85
struct ID3v2ExtraMeta * next
Definition: id3v2.h:86
Definition: url.h:38
char uri[MAX_URL_SIZE]
Definition: hls.c:399
char byterange[32]
Definition: hls.c:400
Definition: hls.c:377
char iv[35]
Definition: hls.c:380
char uri[MAX_URL_SIZE]
Definition: hls.c:378
char method[11]
Definition: hls.c:379
Definition: graph2dot.c:48
Definition: hls.c:93
int finished
Definition: hls.c:112
int id3_changed
Definition: hls.c:145
int broken
Definition: hls.c:119
int64_t cur_seg_offset
Definition: hls.c:123
AVIOContext * input
Definition: hls.c:97
uint8_t * read_buffer
Definition: hls.c:96
int64_t cur_seq_no
Definition: hls.c:120
int n_renditions
Definition: hls.c:156
int64_t id3_mpegts_timestamp
Definition: hls.c:139
struct rendition ** renditions
Definition: hls.c:157
unsigned int init_sec_data_len
Definition: hls.c:130
int64_t id3_offset
Definition: hls.c:140
int64_t target_duration
Definition: hls.c:114
int64_t last_load_time
Definition: hls.c:124
int64_t last_seq_no
Definition: hls.c:121
int seek_stream_index
Definition: hls.c:150
int64_t start_seq_no
Definition: hls.c:115
unsigned int id3_buf_size
Definition: hls.c:142
AVStream ** main_streams
Definition: hls.c:109
AVIOContext * input_next
Definition: hls.c:99
unsigned int init_sec_buf_read_offset
Definition: hls.c:131
AVIOContext pb
Definition: hls.c:95
int64_t seek_timestamp
Definition: hls.c:148
AVPacket * pkt
Definition: hls.c:104
int input_read_done
Definition: hls.c:98
AVFormatContext * ctx
Definition: hls.c:103
uint8_t * init_sec_buf
Definition: hls.c:128
struct segment * cur_init_section
Definition: hls.c:127
uint8_t * id3_buf
Definition: hls.c:141
uint8_t key[16]
Definition: hls.c:134
int id3_found
Definition: hls.c:144
int index
Definition: hls.c:102
int m3u8_hold_counters
Definition: hls.c:122
int needed
Definition: hls.c:118
int has_noheader_flag
Definition: hls.c:105
char key_url[MAX_URL_SIZE]
Definition: hls.c:133
int n_init_sections
Definition: hls.c:161
struct segment ** segments
Definition: hls.c:117
int n_segments
Definition: hls.c:116
struct segment ** init_sections
Definition: hls.c:162
char url[MAX_URL_SIZE]
Definition: hls.c:94
AVFormatContext * parent
Definition: hls.c:101
int seek_flags
Definition: hls.c:149
int is_id3_timestamped
Definition: hls.c:138
unsigned int init_sec_buf_size
Definition: hls.c:129
int n_main_streams
Definition: hls.c:110
int input_next_requested
Definition: hls.c:100
ID3v2ExtraMeta * id3_deferred_extra
Definition: hls.c:146
AVDictionary * id3_initial
Definition: hls.c:143
enum PlaylistType type
Definition: hls.c:113
char type[16]
Definition: hls.c:460
char defaultr[4]
Definition: hls.c:466
char name[MAX_FIELD_LEN]
Definition: hls.c:465
char language[MAX_FIELD_LEN]
Definition: hls.c:463
char forced[4]
Definition: hls.c:467
char uri[MAX_URL_SIZE]
Definition: hls.c:461
char group_id[MAX_FIELD_LEN]
Definition: hls.c:462
char characteristics[MAX_CHARACTERISTICS_LEN]
Definition: hls.c:468
char assoc_language[MAX_FIELD_LEN]
Definition: hls.c:464
Definition: hls.c:171
char name[MAX_FIELD_LEN]
Definition: hls.c:176
enum AVMediaType type
Definition: hls.c:172
char group_id[MAX_FIELD_LEN]
Definition: hls.c:174
char language[MAX_FIELD_LEN]
Definition: hls.c:175
int disposition
Definition: hls.c:177
struct playlist * playlist
Definition: hls.c:173
Definition: hls.c:68
struct segment * init_section
Definition: hls.c:77
int64_t size
Definition: hls.c:71
uint8_t iv[16]
Definition: hls.c:75
char * url
Definition: hls.c:72
int64_t duration
Definition: hls.c:69
int64_t url_offset
Definition: hls.c:70
char * key
Definition: hls.c:73
enum KeyType key_type
Definition: hls.c:74
char bandwidth[20]
Definition: hls.c:326
char video[MAX_FIELD_LEN]
Definition: hls.c:329
char subtitles[MAX_FIELD_LEN]
Definition: hls.c:330
char audio[MAX_FIELD_LEN]
Definition: hls.c:328
Definition: hls.c:180
int bandwidth
Definition: hls.c:181
char audio_group[MAX_FIELD_LEN]
Definition: hls.c:187
int n_playlists
Definition: hls.c:184
char url[MAX_URL_SIZE]
Definition: hlsproto.c:55
struct playlist ** playlists
Definition: hls.c:185
char video_group[MAX_FIELD_LEN]
Definition: hls.c:188
char subtitles_group[MAX_FIELD_LEN]
Definition: hls.c:189
#define av_free(p)
#define av_freep(p)
#define av_malloc(s)
#define av_log(a,...)
static uint8_t tmp[11]
Definition: aes_ctr.c:27
int64_t duration
Definition: movenc.c:64
AVPacket * pkt
Definition: movenc.c:59
AVDictionary * opts
Definition: movenc.c:50
int av_usleep(unsigned usec)
Sleep for a period of time.
Definition: time.c:84
int64_t av_gettime_relative(void)
Get the current time in microseconds since some unspecified starting point.
Definition: time.c:56
int size
int 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:319
const char * r
Definition: vf_curves.c:116
static void fill_buf(uint8_t *data, int w, int h, int linesize, uint8_t v)
static av_always_inline int diff(const uint32_t a, const uint32_t b)
int len
uint8_t base
Definition: vp3data.h:141
static double c[64]