2 * Apple HTTP Live Streaming demuxer
3 * Copyright (c) 2010 Martin Storsjo
4 * Copyright (c) 2013 Anssi Hannula
6 * This file is part of FFmpeg.
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.
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.
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
25 * Apple HTTP Live Streaming demuxer
26 * http://tools.ietf.org/html/draft-pantos-http-live-streaming
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"
39 #include "avio_internal.h"
42 #define INITIAL_BUFFER_SIZE 32768
44 #define MAX_FIELD_LEN 64
45 #define MAX_CHARACTERISTICS_LEN 512
47 #define MPEG_TIME_BASE 90000
48 #define MPEG_TIME_BASE_Q (AVRational){1, MPEG_TIME_BASE}
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
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.
74 enum KeyType key_type;
76 /* associated Media Initialization Section, treated as a segment */
77 struct segment *init_section;
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.
94 char url[MAX_URL_SIZE];
99 AVIOContext *input_next;
100 int input_next_requested;
101 AVFormatContext *parent;
103 AVFormatContext *ctx;
105 int has_noheader_flag;
107 /* main demuxer streams associated with this playlist
108 * indexed by the subdemuxer stream indexes */
109 AVStream **main_streams;
113 enum PlaylistType type;
114 int64_t target_duration;
117 struct segment **segments;
120 int64_t cur_seg_offset;
121 int64_t last_load_time;
123 /* Currently active Media Initialization Section */
124 struct segment *cur_init_section;
125 uint8_t *init_sec_buf;
126 unsigned int init_sec_buf_size;
127 unsigned int init_sec_data_len;
128 unsigned int init_sec_buf_read_offset;
130 char key_url[MAX_URL_SIZE];
133 /* ID3 timestamp handling (elementary audio streams have ID3 timestamps
134 * (and possibly other ID3 tags) in the beginning of each segment) */
135 int is_id3_timestamped; /* -1: not yet known */
136 int64_t id3_mpegts_timestamp; /* in mpegts tb */
137 int64_t id3_offset; /* in stream original tb */
138 uint8_t* id3_buf; /* temp buffer for id3 parsing */
139 unsigned int id3_buf_size;
140 AVDictionary *id3_initial; /* data from first id3 tag */
141 int id3_found; /* ID3 tag found at some point */
142 int id3_changed; /* ID3 tag data has changed at some point */
143 ID3v2ExtraMeta *id3_deferred_extra; /* stored here until subdemuxer is opened */
145 int64_t seek_timestamp;
147 int seek_stream_index; /* into subdemuxer stream array */
149 /* Renditions associated with this playlist, if any.
150 * Alternative rendition playlists have a single rendition associated
151 * with them, and variant main Media Playlists may have
152 * multiple (playlist-less) renditions associated with them. */
154 struct rendition **renditions;
156 /* Media Initialization Sections (EXT-X-MAP) associated with this
157 * playlist, if any. */
159 struct segment **init_sections;
163 * Renditions are e.g. alternative subtitle or audio streams.
164 * The rendition may either be an external playlist or it may be
165 * contained in the main Media Playlist of the variant (in which case
169 enum AVMediaType type;
170 struct playlist *playlist;
171 char group_id[MAX_FIELD_LEN];
172 char language[MAX_FIELD_LEN];
173 char name[MAX_FIELD_LEN];
180 /* every variant contains at least the main Media Playlist in index 0 */
182 struct playlist **playlists;
184 char audio_group[MAX_FIELD_LEN];
185 char video_group[MAX_FIELD_LEN];
186 char subtitles_group[MAX_FIELD_LEN];
189 typedef struct HLSContext {
191 AVFormatContext *ctx;
193 struct variant **variants;
195 struct playlist **playlists;
197 struct rendition **renditions;
200 int live_start_index;
202 int64_t first_timestamp;
203 int64_t cur_timestamp;
204 AVIOInterruptCB *interrupt_callback;
205 char *referer; ///< holds HTTP referer set as an AVOption to the HTTP protocol context
206 char *user_agent; ///< holds HTTP user agent set as an AVOption to the HTTP protocol context
207 char *cookies; ///< holds HTTP cookie values set in either the initial response or as an AVOption to the HTTP protocol context
208 char *headers; ///< holds HTTP headers set as an AVOption to the HTTP protocol context
209 char *http_proxy; ///< holds the address of the HTTP proxy server
210 AVDictionary *avio_opts;
211 int strict_std_compliance;
212 char *allowed_extensions;
216 AVIOContext *playlist_pb;
219 static void free_segment_list(struct playlist *pls)
222 for (i = 0; i < pls->n_segments; i++) {
223 av_freep(&pls->segments[i]->key);
224 av_freep(&pls->segments[i]->url);
225 av_freep(&pls->segments[i]);
227 av_freep(&pls->segments);
231 static void free_init_section_list(struct playlist *pls)
234 for (i = 0; i < pls->n_init_sections; i++) {
235 av_freep(&pls->init_sections[i]->url);
236 av_freep(&pls->init_sections[i]);
238 av_freep(&pls->init_sections);
239 pls->n_init_sections = 0;
242 static void free_playlist_list(HLSContext *c)
245 for (i = 0; i < c->n_playlists; i++) {
246 struct playlist *pls = c->playlists[i];
247 free_segment_list(pls);
248 free_init_section_list(pls);
249 av_freep(&pls->main_streams);
250 av_freep(&pls->renditions);
251 av_freep(&pls->id3_buf);
252 av_dict_free(&pls->id3_initial);
253 ff_id3v2_free_extra_meta(&pls->id3_deferred_extra);
254 av_freep(&pls->init_sec_buf);
255 av_packet_unref(&pls->pkt);
256 av_freep(&pls->pb.buffer);
258 ff_format_io_close(c->ctx, &pls->input);
259 pls->input_read_done = 0;
261 ff_format_io_close(c->ctx, &pls->input_next);
262 pls->input_next_requested = 0;
265 avformat_close_input(&pls->ctx);
269 av_freep(&c->playlists);
270 av_freep(&c->cookies);
271 av_freep(&c->user_agent);
272 av_freep(&c->headers);
273 av_freep(&c->http_proxy);
277 static void free_variant_list(HLSContext *c)
280 for (i = 0; i < c->n_variants; i++) {
281 struct variant *var = c->variants[i];
282 av_freep(&var->playlists);
285 av_freep(&c->variants);
289 static void free_rendition_list(HLSContext *c)
292 for (i = 0; i < c->n_renditions; i++)
293 av_freep(&c->renditions[i]);
294 av_freep(&c->renditions);
299 * Used to reset a statically allocated AVPacket to a clean slate,
300 * containing no data.
302 static void reset_packet(AVPacket *pkt)
308 static struct playlist *new_playlist(HLSContext *c, const char *url,
311 struct playlist *pls = av_mallocz(sizeof(struct playlist));
314 reset_packet(&pls->pkt);
315 ff_make_absolute_url(pls->url, sizeof(pls->url), base, url);
316 pls->seek_timestamp = AV_NOPTS_VALUE;
318 pls->is_id3_timestamped = -1;
319 pls->id3_mpegts_timestamp = AV_NOPTS_VALUE;
321 dynarray_add(&c->playlists, &c->n_playlists, pls);
325 struct variant_info {
327 /* variant group ids: */
328 char audio[MAX_FIELD_LEN];
329 char video[MAX_FIELD_LEN];
330 char subtitles[MAX_FIELD_LEN];
333 static struct variant *new_variant(HLSContext *c, struct variant_info *info,
334 const char *url, const char *base)
337 struct playlist *pls;
339 pls = new_playlist(c, url, base);
343 var = av_mallocz(sizeof(struct variant));
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);
354 dynarray_add(&c->variants, &c->n_variants, var);
355 dynarray_add(&var->playlists, &var->n_playlists, pls);
359 static void handle_variant_args(struct variant_info *info, const char *key,
360 int key_len, char **dest, int *dest_len)
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)) {
367 *dest_len = sizeof(info->audio);
368 } else if (!strncmp(key, "VIDEO=", key_len)) {
370 *dest_len = sizeof(info->video);
371 } else if (!strncmp(key, "SUBTITLES=", key_len)) {
372 *dest = info->subtitles;
373 *dest_len = sizeof(info->subtitles);
378 char uri[MAX_URL_SIZE];
383 static void handle_key_args(struct key_info *info, const char *key,
384 int key_len, char **dest, int *dest_len)
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)) {
391 *dest_len = sizeof(info->uri);
392 } else if (!strncmp(key, "IV=", key_len)) {
394 *dest_len = sizeof(info->iv);
398 struct init_section_info {
399 char uri[MAX_URL_SIZE];
403 static struct segment *new_init_section(struct playlist *pls,
404 struct init_section_info *info,
405 const char *url_base)
409 char tmp_str[MAX_URL_SIZE];
414 sec = av_mallocz(sizeof(*sec));
418 ff_make_absolute_url(tmp_str, sizeof(tmp_str), url_base, info->uri);
419 sec->url = av_strdup(tmp_str);
425 if (info->byterange[0]) {
426 sec->size = strtoll(info->byterange, NULL, 10);
427 ptr = strchr(info->byterange, '@');
429 sec->url_offset = strtoll(ptr+1, NULL, 10);
431 /* the entire file is the init section */
435 dynarray_add(&pls->init_sections, &pls->n_init_sections, sec);
440 static void handle_init_section_args(struct init_section_info *info, const char *key,
441 int key_len, char **dest, int *dest_len)
443 if (!strncmp(key, "URI=", key_len)) {
445 *dest_len = sizeof(info->uri);
446 } else if (!strncmp(key, "BYTERANGE=", key_len)) {
447 *dest = info->byterange;
448 *dest_len = sizeof(info->byterange);
452 struct rendition_info {
454 char uri[MAX_URL_SIZE];
455 char group_id[MAX_FIELD_LEN];
456 char language[MAX_FIELD_LEN];
457 char assoc_language[MAX_FIELD_LEN];
458 char name[MAX_FIELD_LEN];
461 char characteristics[MAX_CHARACTERISTICS_LEN];
464 static struct rendition *new_rendition(HLSContext *c, struct rendition_info *info,
465 const char *url_base)
467 struct rendition *rend;
468 enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
469 char *characteristic;
473 if (!strcmp(info->type, "AUDIO"))
474 type = AVMEDIA_TYPE_AUDIO;
475 else if (!strcmp(info->type, "VIDEO"))
476 type = AVMEDIA_TYPE_VIDEO;
477 else if (!strcmp(info->type, "SUBTITLES"))
478 type = AVMEDIA_TYPE_SUBTITLE;
479 else if (!strcmp(info->type, "CLOSED-CAPTIONS"))
480 /* CLOSED-CAPTIONS is ignored since we do not support CEA-608 CC in
481 * AVC SEI RBSP anyway */
484 if (type == AVMEDIA_TYPE_UNKNOWN)
487 /* URI is mandatory for subtitles as per spec */
488 if (type == AVMEDIA_TYPE_SUBTITLE && !info->uri[0])
491 /* TODO: handle subtitles (each segment has to parsed separately) */
492 if (c->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL)
493 if (type == AVMEDIA_TYPE_SUBTITLE)
496 rend = av_mallocz(sizeof(struct rendition));
500 dynarray_add(&c->renditions, &c->n_renditions, rend);
503 strcpy(rend->group_id, info->group_id);
504 strcpy(rend->language, info->language);
505 strcpy(rend->name, info->name);
507 /* add the playlist if this is an external rendition */
509 rend->playlist = new_playlist(c, info->uri, url_base);
511 dynarray_add(&rend->playlist->renditions,
512 &rend->playlist->n_renditions, rend);
515 if (info->assoc_language[0]) {
516 int langlen = strlen(rend->language);
517 if (langlen < sizeof(rend->language) - 3) {
518 rend->language[langlen] = ',';
519 strncpy(rend->language + langlen + 1, info->assoc_language,
520 sizeof(rend->language) - langlen - 2);
524 if (!strcmp(info->defaultr, "YES"))
525 rend->disposition |= AV_DISPOSITION_DEFAULT;
526 if (!strcmp(info->forced, "YES"))
527 rend->disposition |= AV_DISPOSITION_FORCED;
529 chr_ptr = info->characteristics;
530 while ((characteristic = av_strtok(chr_ptr, ",", &saveptr))) {
531 if (!strcmp(characteristic, "public.accessibility.describes-music-and-sound"))
532 rend->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
533 else if (!strcmp(characteristic, "public.accessibility.describes-video"))
534 rend->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
542 static void handle_rendition_args(struct rendition_info *info, const char *key,
543 int key_len, char **dest, int *dest_len)
545 if (!strncmp(key, "TYPE=", key_len)) {
547 *dest_len = sizeof(info->type);
548 } else if (!strncmp(key, "URI=", key_len)) {
550 *dest_len = sizeof(info->uri);
551 } else if (!strncmp(key, "GROUP-ID=", key_len)) {
552 *dest = info->group_id;
553 *dest_len = sizeof(info->group_id);
554 } else if (!strncmp(key, "LANGUAGE=", key_len)) {
555 *dest = info->language;
556 *dest_len = sizeof(info->language);
557 } else if (!strncmp(key, "ASSOC-LANGUAGE=", key_len)) {
558 *dest = info->assoc_language;
559 *dest_len = sizeof(info->assoc_language);
560 } else if (!strncmp(key, "NAME=", key_len)) {
562 *dest_len = sizeof(info->name);
563 } else if (!strncmp(key, "DEFAULT=", key_len)) {
564 *dest = info->defaultr;
565 *dest_len = sizeof(info->defaultr);
566 } else if (!strncmp(key, "FORCED=", key_len)) {
567 *dest = info->forced;
568 *dest_len = sizeof(info->forced);
569 } else if (!strncmp(key, "CHARACTERISTICS=", key_len)) {
570 *dest = info->characteristics;
571 *dest_len = sizeof(info->characteristics);
575 * - AUTOSELECT: client may autoselect based on e.g. system language
576 * - INSTREAM-ID: EIA-608 closed caption number ("CC1".."CC4")
580 /* used by parse_playlist to allocate a new variant+playlist when the
581 * playlist is detected to be a Media Playlist (not Master Playlist)
582 * and we have no parent Master Playlist (parsing of which would have
583 * allocated the variant and playlist already)
584 * *pls == NULL => Master Playlist or parentless Media Playlist
585 * *pls != NULL => parented Media Playlist, playlist+variant allocated */
586 static int ensure_playlist(HLSContext *c, struct playlist **pls, const char *url)
590 if (!new_variant(c, NULL, url, NULL))
591 return AVERROR(ENOMEM);
592 *pls = c->playlists[c->n_playlists - 1];
596 static void update_options(char **dest, const char *name, void *src)
599 av_opt_get(src, name, AV_OPT_SEARCH_CHILDREN, (uint8_t**)dest);
600 if (*dest && !strlen(*dest))
604 static int open_url_keepalive(AVFormatContext *s, AVIOContext **pb,
607 #if !CONFIG_HTTP_PROTOCOL
608 return AVERROR_PROTOCOL_NOT_FOUND;
611 URLContext *uc = ffio_geturlcontext(*pb);
613 (*pb)->eof_reached = 0;
614 ret = ff_http_do_new_request(uc, url);
616 ff_format_io_close(s, pb);
622 static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url,
623 AVDictionary *opts, AVDictionary *opts2, int *is_http_out)
625 HLSContext *c = s->priv_data;
626 AVDictionary *tmp = NULL;
627 const char *proto_name = NULL;
631 av_dict_copy(&tmp, opts, 0);
632 av_dict_copy(&tmp, opts2, 0);
634 if (av_strstart(url, "crypto", NULL)) {
635 if (url[6] == '+' || url[6] == ':')
636 proto_name = avio_find_protocol_name(url + 7);
640 proto_name = avio_find_protocol_name(url);
643 return AVERROR_INVALIDDATA;
645 // only http(s) & file are allowed
646 if (av_strstart(proto_name, "file", NULL)) {
647 if (strcmp(c->allowed_extensions, "ALL") && !av_match_ext(url, c->allowed_extensions)) {
648 av_log(s, AV_LOG_ERROR,
649 "Filename extension of \'%s\' is not a common multimedia extension, blocked for security reasons.\n"
650 "If you wish to override this adjust allowed_extensions, you can set it to \'ALL\' to allow all\n",
652 return AVERROR_INVALIDDATA;
654 } else if (av_strstart(proto_name, "http", NULL)) {
657 return AVERROR_INVALIDDATA;
659 if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':')
661 else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':')
663 else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))
664 return AVERROR_INVALIDDATA;
666 if (is_http && c->http_persistent && *pb) {
667 ret = open_url_keepalive(c->ctx, pb, url);
668 if (ret == AVERROR_EXIT) {
670 } else if (ret < 0) {
671 if (ret != AVERROR_EOF)
672 av_log(s, AV_LOG_WARNING,
673 "keepalive request failed for '%s', retrying with new connection: %s\n",
674 url, av_err2str(ret));
675 ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
678 ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
681 // update cookies on http response with setcookies.
682 char *new_cookies = NULL;
684 if (!(s->flags & AVFMT_FLAG_CUSTOM_IO))
685 av_opt_get(*pb, "cookies", AV_OPT_SEARCH_CHILDREN, (uint8_t**)&new_cookies);
689 c->cookies = new_cookies;
692 av_dict_set(&opts, "cookies", c->cookies, 0);
698 *is_http_out = is_http;
703 static int parse_playlist(HLSContext *c, const char *url,
704 struct playlist *pls, AVIOContext *in)
706 int ret = 0, is_segment = 0, is_variant = 0;
707 int64_t duration = 0;
708 enum KeyType key_type = KEY_NONE;
711 char key[MAX_URL_SIZE] = "";
712 char line[MAX_URL_SIZE];
715 int64_t seg_offset = 0;
716 int64_t seg_size = -1;
717 uint8_t *new_url = NULL;
718 struct variant_info variant_info;
719 char tmp_str[MAX_URL_SIZE];
720 struct segment *cur_init_section = NULL;
721 int is_http = av_strstart(url, "http", NULL);
723 if (is_http && !in && c->http_persistent && c->playlist_pb) {
725 ret = open_url_keepalive(c->ctx, &c->playlist_pb, url);
726 if (ret == AVERROR_EXIT) {
728 } else if (ret < 0) {
729 if (ret != AVERROR_EOF)
730 av_log(c->ctx, AV_LOG_WARNING,
731 "keepalive request failed for '%s', retrying with new connection: %s\n",
732 url, av_err2str(ret));
738 AVDictionary *opts = NULL;
739 /* Some HLS servers don't like being sent the range header */
740 av_dict_set(&opts, "seekable", "0", 0);
742 // broker prior HTTP options that should be consistent across requests
743 av_dict_set(&opts, "user_agent", c->user_agent, 0);
744 av_dict_set(&opts, "cookies", c->cookies, 0);
745 av_dict_set(&opts, "headers", c->headers, 0);
746 av_dict_set(&opts, "http_proxy", c->http_proxy, 0);
748 if (c->http_persistent)
749 av_dict_set(&opts, "multiple_requests", "1", 0);
751 ret = c->ctx->io_open(c->ctx, &in, url, AVIO_FLAG_READ, &opts);
756 if (is_http && c->http_persistent)
762 if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >= 0)
765 ff_get_chomp_line(in, line, sizeof(line));
766 if (strcmp(line, "#EXTM3U")) {
767 ret = AVERROR_INVALIDDATA;
772 free_segment_list(pls);
774 pls->type = PLS_TYPE_UNSPECIFIED;
776 while (!avio_feof(in)) {
777 ff_get_chomp_line(in, line, sizeof(line));
778 if (av_strstart(line, "#EXT-X-STREAM-INF:", &ptr)) {
780 memset(&variant_info, 0, sizeof(variant_info));
781 ff_parse_key_value(ptr, (ff_parse_key_val_cb) handle_variant_args,
783 } else if (av_strstart(line, "#EXT-X-KEY:", &ptr)) {
784 struct key_info info = {{0}};
785 ff_parse_key_value(ptr, (ff_parse_key_val_cb) handle_key_args,
789 if (!strcmp(info.method, "AES-128"))
790 key_type = KEY_AES_128;
791 if (!strcmp(info.method, "SAMPLE-AES"))
792 key_type = KEY_SAMPLE_AES;
793 if (!strncmp(info.iv, "0x", 2) || !strncmp(info.iv, "0X", 2)) {
794 ff_hex_to_data(iv, info.iv + 2);
797 av_strlcpy(key, info.uri, sizeof(key));
798 } else if (av_strstart(line, "#EXT-X-MEDIA:", &ptr)) {
799 struct rendition_info info = {{0}};
800 ff_parse_key_value(ptr, (ff_parse_key_val_cb) handle_rendition_args,
802 new_rendition(c, &info, url);
803 } else if (av_strstart(line, "#EXT-X-TARGETDURATION:", &ptr)) {
804 ret = ensure_playlist(c, &pls, url);
807 pls->target_duration = strtoll(ptr, NULL, 10) * AV_TIME_BASE;
808 } else if (av_strstart(line, "#EXT-X-MEDIA-SEQUENCE:", &ptr)) {
809 ret = ensure_playlist(c, &pls, url);
812 pls->start_seq_no = atoi(ptr);
813 } else if (av_strstart(line, "#EXT-X-PLAYLIST-TYPE:", &ptr)) {
814 ret = ensure_playlist(c, &pls, url);
817 if (!strcmp(ptr, "EVENT"))
818 pls->type = PLS_TYPE_EVENT;
819 else if (!strcmp(ptr, "VOD"))
820 pls->type = PLS_TYPE_VOD;
821 } else if (av_strstart(line, "#EXT-X-MAP:", &ptr)) {
822 struct init_section_info info = {{0}};
823 ret = ensure_playlist(c, &pls, url);
826 ff_parse_key_value(ptr, (ff_parse_key_val_cb) handle_init_section_args,
828 cur_init_section = new_init_section(pls, &info, url);
829 } else if (av_strstart(line, "#EXT-X-ENDLIST", &ptr)) {
832 } else if (av_strstart(line, "#EXTINF:", &ptr)) {
834 duration = atof(ptr) * AV_TIME_BASE;
835 } else if (av_strstart(line, "#EXT-X-BYTERANGE:", &ptr)) {
836 seg_size = strtoll(ptr, NULL, 10);
837 ptr = strchr(ptr, '@');
839 seg_offset = strtoll(ptr+1, NULL, 10);
840 } else if (av_strstart(line, "#", NULL)) {
842 } else if (line[0]) {
844 if (!new_variant(c, &variant_info, line, url)) {
845 ret = AVERROR(ENOMEM);
853 if (!new_variant(c, 0, url, NULL)) {
854 ret = AVERROR(ENOMEM);
857 pls = c->playlists[c->n_playlists - 1];
859 seg = av_malloc(sizeof(struct segment));
861 ret = AVERROR(ENOMEM);
864 seg->duration = duration;
865 seg->key_type = key_type;
867 memcpy(seg->iv, iv, sizeof(iv));
869 int seq = pls->start_seq_no + pls->n_segments;
870 memset(seg->iv, 0, sizeof(seg->iv));
871 AV_WB32(seg->iv + 12, seq);
874 if (key_type != KEY_NONE) {
875 ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, key);
876 seg->key = av_strdup(tmp_str);
879 ret = AVERROR(ENOMEM);
886 ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, line);
887 seg->url = av_strdup(tmp_str);
891 ret = AVERROR(ENOMEM);
895 dynarray_add(&pls->segments, &pls->n_segments, seg);
898 seg->size = seg_size;
900 seg->url_offset = seg_offset;
901 seg_offset += seg_size;
908 seg->init_section = cur_init_section;
913 pls->last_load_time = av_gettime_relative();
918 ff_format_io_close(c->ctx, &in);
919 c->ctx->ctx_flags = c->ctx->ctx_flags & ~(unsigned)AVFMTCTX_UNSEEKABLE;
920 if (!c->n_variants || !c->variants[0]->n_playlists ||
921 !(c->variants[0]->playlists[0]->finished ||
922 c->variants[0]->playlists[0]->type == PLS_TYPE_EVENT))
923 c->ctx->ctx_flags |= AVFMTCTX_UNSEEKABLE;
927 static struct segment *current_segment(struct playlist *pls)
929 return pls->segments[pls->cur_seq_no - pls->start_seq_no];
932 static struct segment *next_segment(struct playlist *pls)
934 int n = pls->cur_seq_no - pls->start_seq_no + 1;
935 if (n >= pls->n_segments)
937 return pls->segments[n];
940 static int read_from_url(struct playlist *pls, struct segment *seg,
941 uint8_t *buf, int buf_size)
945 /* limit read if the segment was only a part of a file */
947 buf_size = FFMIN(buf_size, seg->size - pls->cur_seg_offset);
949 ret = avio_read(pls->input, buf, buf_size);
951 av_log(NULL, AV_LOG_ERROR, "Could not read complete segment.\n");
954 pls->cur_seg_offset += ret;
959 /* Parse the raw ID3 data and pass contents to caller */
960 static void parse_id3(AVFormatContext *s, AVIOContext *pb,
961 AVDictionary **metadata, int64_t *dts,
962 ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta **extra_meta)
964 static const char id3_priv_owner_ts[] = "com.apple.streaming.transportStreamTimestamp";
965 ID3v2ExtraMeta *meta;
967 ff_id3v2_read_dict(pb, metadata, ID3v2_DEFAULT_MAGIC, extra_meta);
968 for (meta = *extra_meta; meta; meta = meta->next) {
969 if (!strcmp(meta->tag, "PRIV")) {
970 ID3v2ExtraMetaPRIV *priv = meta->data;
971 if (priv->datasize == 8 && !strcmp(priv->owner, id3_priv_owner_ts)) {
972 /* 33-bit MPEG timestamp */
973 int64_t ts = AV_RB64(priv->data);
974 av_log(s, AV_LOG_DEBUG, "HLS ID3 audio timestamp %"PRId64"\n", ts);
975 if ((ts & ~((1ULL << 33) - 1)) == 0)
978 av_log(s, AV_LOG_ERROR, "Invalid HLS ID3 audio timestamp %"PRId64"\n", ts);
980 } else if (!strcmp(meta->tag, "APIC") && apic)
985 /* Check if the ID3 metadata contents have changed */
986 static int id3_has_changed_values(struct playlist *pls, AVDictionary *metadata,
987 ID3v2ExtraMetaAPIC *apic)
989 AVDictionaryEntry *entry = NULL;
990 AVDictionaryEntry *oldentry;
991 /* check that no keys have changed values */
992 while ((entry = av_dict_get(metadata, "", entry, AV_DICT_IGNORE_SUFFIX))) {
993 oldentry = av_dict_get(pls->id3_initial, entry->key, NULL, AV_DICT_MATCH_CASE);
994 if (!oldentry || strcmp(oldentry->value, entry->value) != 0)
998 /* check if apic appeared */
999 if (apic && (pls->ctx->nb_streams != 2 || !pls->ctx->streams[1]->attached_pic.data))
1003 int size = pls->ctx->streams[1]->attached_pic.size;
1004 if (size != apic->buf->size - AV_INPUT_BUFFER_PADDING_SIZE)
1007 if (memcmp(apic->buf->data, pls->ctx->streams[1]->attached_pic.data, size) != 0)
1014 /* Parse ID3 data and handle the found data */
1015 static void handle_id3(AVIOContext *pb, struct playlist *pls)
1017 AVDictionary *metadata = NULL;
1018 ID3v2ExtraMetaAPIC *apic = NULL;
1019 ID3v2ExtraMeta *extra_meta = NULL;
1020 int64_t timestamp = AV_NOPTS_VALUE;
1022 parse_id3(pls->ctx, pb, &metadata, ×tamp, &apic, &extra_meta);
1024 if (timestamp != AV_NOPTS_VALUE) {
1025 pls->id3_mpegts_timestamp = timestamp;
1026 pls->id3_offset = 0;
1029 if (!pls->id3_found) {
1030 /* initial ID3 tags */
1031 av_assert0(!pls->id3_deferred_extra);
1034 /* get picture attachment and set text metadata */
1035 if (pls->ctx->nb_streams)
1036 ff_id3v2_parse_apic(pls->ctx, &extra_meta);
1038 /* demuxer not yet opened, defer picture attachment */
1039 pls->id3_deferred_extra = extra_meta;
1041 ff_id3v2_parse_priv_dict(&metadata, &extra_meta);
1042 av_dict_copy(&pls->ctx->metadata, metadata, 0);
1043 pls->id3_initial = metadata;
1046 if (!pls->id3_changed && id3_has_changed_values(pls, metadata, apic)) {
1047 avpriv_report_missing_feature(pls->ctx, "Changing ID3 metadata in HLS audio elementary stream");
1048 pls->id3_changed = 1;
1050 av_dict_free(&metadata);
1053 if (!pls->id3_deferred_extra)
1054 ff_id3v2_free_extra_meta(&extra_meta);
1057 static void intercept_id3(struct playlist *pls, uint8_t *buf,
1058 int buf_size, int *len)
1060 /* intercept id3 tags, we do not want to pass them to the raw
1061 * demuxer on all segment switches */
1063 int id3_buf_pos = 0;
1065 struct segment *seg = current_segment(pls);
1067 /* gather all the id3 tags */
1069 /* see if we can retrieve enough data for ID3 header */
1070 if (*len < ID3v2_HEADER_SIZE && buf_size >= ID3v2_HEADER_SIZE) {
1071 bytes = read_from_url(pls, seg, buf + *len, ID3v2_HEADER_SIZE - *len);
1074 if (bytes == ID3v2_HEADER_SIZE - *len)
1075 /* no EOF yet, so fill the caller buffer again after
1076 * we have stripped the ID3 tags */
1081 } else if (*len <= 0) {
1088 if (*len < ID3v2_HEADER_SIZE)
1091 if (ff_id3v2_match(buf, ID3v2_DEFAULT_MAGIC)) {
1092 int64_t maxsize = seg->size >= 0 ? seg->size : 1024*1024;
1093 int taglen = ff_id3v2_tag_len(buf);
1094 int tag_got_bytes = FFMIN(taglen, *len);
1095 int remaining = taglen - tag_got_bytes;
1097 if (taglen > maxsize) {
1098 av_log(pls->ctx, AV_LOG_ERROR, "Too large HLS ID3 tag (%d > %"PRId64" bytes)\n",
1104 * Copy the id3 tag to our temporary id3 buffer.
1105 * We could read a small id3 tag directly without memcpy, but
1106 * we would still need to copy the large tags, and handling
1107 * both of those cases together with the possibility for multiple
1108 * tags would make the handling a bit complex.
1110 pls->id3_buf = av_fast_realloc(pls->id3_buf, &pls->id3_buf_size, id3_buf_pos + taglen);
1113 memcpy(pls->id3_buf + id3_buf_pos, buf, tag_got_bytes);
1114 id3_buf_pos += tag_got_bytes;
1116 /* strip the intercepted bytes */
1117 *len -= tag_got_bytes;
1118 memmove(buf, buf + tag_got_bytes, *len);
1119 av_log(pls->ctx, AV_LOG_DEBUG, "Stripped %d HLS ID3 bytes\n", tag_got_bytes);
1121 if (remaining > 0) {
1122 /* read the rest of the tag in */
1123 if (read_from_url(pls, seg, pls->id3_buf + id3_buf_pos, remaining) != remaining)
1125 id3_buf_pos += remaining;
1126 av_log(pls->ctx, AV_LOG_DEBUG, "Stripped additional %d HLS ID3 bytes\n", remaining);
1130 /* no more ID3 tags */
1135 /* re-fill buffer for the caller unless EOF */
1136 if (*len >= 0 && (fill_buf || *len == 0)) {
1137 bytes = read_from_url(pls, seg, buf + *len, buf_size - *len);
1139 /* ignore error if we already had some data */
1147 /* Now parse all the ID3 tags */
1148 AVIOContext id3ioctx;
1149 ffio_init_context(&id3ioctx, pls->id3_buf, id3_buf_pos, 0, NULL, NULL, NULL, NULL);
1150 handle_id3(&id3ioctx, pls);
1153 if (pls->is_id3_timestamped == -1)
1154 pls->is_id3_timestamped = (pls->id3_mpegts_timestamp != AV_NOPTS_VALUE);
1157 static int open_input(HLSContext *c, struct playlist *pls, struct segment *seg, AVIOContext **in)
1159 AVDictionary *opts = NULL;
1163 // broker prior HTTP options that should be consistent across requests
1164 av_dict_set(&opts, "user_agent", c->user_agent, 0);
1165 av_dict_set(&opts, "referer", c->referer, 0);
1166 av_dict_set(&opts, "cookies", c->cookies, 0);
1167 av_dict_set(&opts, "headers", c->headers, 0);
1168 av_dict_set(&opts, "http_proxy", c->http_proxy, 0);
1169 av_dict_set(&opts, "seekable", "0", 0);
1171 if (c->http_persistent)
1172 av_dict_set(&opts, "multiple_requests", "1", 0);
1174 if (seg->size >= 0) {
1175 /* try to restrict the HTTP request to the part we want
1176 * (if this is in fact a HTTP request) */
1177 av_dict_set_int(&opts, "offset", seg->url_offset, 0);
1178 av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
1181 av_log(pls->parent, AV_LOG_VERBOSE, "HLS request for url '%s', offset %"PRId64", playlist %d\n",
1182 seg->url, seg->url_offset, pls->index);
1184 if (seg->key_type == KEY_NONE) {
1185 ret = open_url(pls->parent, in, seg->url, c->avio_opts, opts, &is_http);
1186 } else if (seg->key_type == KEY_AES_128) {
1187 AVDictionary *opts2 = NULL;
1188 char iv[33], key[33], url[MAX_URL_SIZE];
1189 if (strcmp(seg->key, pls->key_url)) {
1190 AVIOContext *pb = NULL;
1191 if (open_url(pls->parent, &pb, seg->key, c->avio_opts, opts, NULL) == 0) {
1192 ret = avio_read(pb, pls->key, sizeof(pls->key));
1193 if (ret != sizeof(pls->key)) {
1194 av_log(NULL, AV_LOG_ERROR, "Unable to read key file %s\n",
1197 ff_format_io_close(pls->parent, &pb);
1199 av_log(NULL, AV_LOG_ERROR, "Unable to open key file %s\n",
1202 av_strlcpy(pls->key_url, seg->key, sizeof(pls->key_url));
1204 ff_data_to_hex(iv, seg->iv, sizeof(seg->iv), 0);
1205 ff_data_to_hex(key, pls->key, sizeof(pls->key), 0);
1206 iv[32] = key[32] = '\0';
1207 if (strstr(seg->url, "://"))
1208 snprintf(url, sizeof(url), "crypto+%s", seg->url);
1210 snprintf(url, sizeof(url), "crypto:%s", seg->url);
1212 av_dict_copy(&opts2, c->avio_opts, 0);
1213 av_dict_set(&opts2, "key", key, 0);
1214 av_dict_set(&opts2, "iv", iv, 0);
1216 ret = open_url(pls->parent, in, url, opts2, opts, &is_http);
1218 av_dict_free(&opts2);
1224 } else if (seg->key_type == KEY_SAMPLE_AES) {
1225 av_log(pls->parent, AV_LOG_ERROR,
1226 "SAMPLE-AES encryption is not supported yet\n");
1227 ret = AVERROR_PATCHWELCOME;
1230 ret = AVERROR(ENOSYS);
1232 /* Seek to the requested position. If this was a HTTP request, the offset
1233 * should already be where want it to, but this allows e.g. local testing
1234 * without a HTTP server.
1236 * This is not done for HTTP at all as avio_seek() does internal bookkeeping
1237 * of file offset which is out-of-sync with the actual offset when "offset"
1238 * AVOption is used with http protocol, causing the seek to not be a no-op
1239 * as would be expected. Wrong offset received from the server will not be
1240 * noticed without the call, though.
1242 if (ret == 0 && !is_http && seg->key_type == KEY_NONE && seg->url_offset) {
1243 int64_t seekret = avio_seek(*in, seg->url_offset, SEEK_SET);
1245 av_log(pls->parent, AV_LOG_ERROR, "Unable to seek to offset %"PRId64" of HLS segment '%s'\n", seg->url_offset, seg->url);
1247 ff_format_io_close(pls->parent, in);
1252 av_dict_free(&opts);
1253 pls->cur_seg_offset = 0;
1257 static int update_init_section(struct playlist *pls, struct segment *seg)
1259 static const int max_init_section_size = 1024*1024;
1260 HLSContext *c = pls->parent->priv_data;
1265 if (seg->init_section == pls->cur_init_section)
1268 pls->cur_init_section = NULL;
1270 if (!seg->init_section)
1273 ret = open_input(c, pls, seg->init_section, &pls->input);
1275 av_log(pls->parent, AV_LOG_WARNING,
1276 "Failed to open an initialization section in playlist %d\n",
1281 if (seg->init_section->size >= 0)
1282 sec_size = seg->init_section->size;
1283 else if ((urlsize = avio_size(pls->input)) >= 0)
1286 sec_size = max_init_section_size;
1288 av_log(pls->parent, AV_LOG_DEBUG,
1289 "Downloading an initialization section of size %"PRId64"\n",
1292 sec_size = FFMIN(sec_size, max_init_section_size);
1294 av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size);
1296 ret = read_from_url(pls, seg->init_section, pls->init_sec_buf,
1297 pls->init_sec_buf_size);
1298 ff_format_io_close(pls->parent, &pls->input);
1303 pls->cur_init_section = seg->init_section;
1304 pls->init_sec_data_len = ret;
1305 pls->init_sec_buf_read_offset = 0;
1307 /* spec says audio elementary streams do not have media initialization
1308 * sections, so there should be no ID3 timestamps */
1309 pls->is_id3_timestamped = 0;
1314 static int64_t default_reload_interval(struct playlist *pls)
1316 return pls->n_segments > 0 ?
1317 pls->segments[pls->n_segments - 1]->duration :
1318 pls->target_duration;
1321 static int playlist_needed(struct playlist *pls)
1323 AVFormatContext *s = pls->parent;
1325 int stream_needed = 0;
1328 /* If there is no context or streams yet, the playlist is needed */
1329 if (!pls->ctx || !pls->n_main_streams)
1332 /* check if any of the streams in the playlist are needed */
1333 for (i = 0; i < pls->n_main_streams; i++) {
1334 if (pls->main_streams[i]->discard < AVDISCARD_ALL) {
1340 /* If all streams in the playlist were discarded, the playlist is not
1341 * needed (regardless of whether whole programs are discarded or not). */
1345 /* Otherwise, check if all the programs (variants) this playlist is in are
1346 * discarded. Since all streams in the playlist are part of the same programs
1347 * we can just check the programs of the first stream. */
1349 first_st = pls->main_streams[0]->index;
1351 for (i = 0; i < s->nb_programs; i++) {
1352 AVProgram *program = s->programs[i];
1353 if (program->discard < AVDISCARD_ALL) {
1354 for (j = 0; j < program->nb_stream_indexes; j++) {
1355 if (program->stream_index[j] == first_st) {
1356 /* playlist is in an undiscarded program */
1363 /* some streams were not discarded but all the programs were */
1367 static int read_data(void *opaque, uint8_t *buf, int buf_size)
1369 struct playlist *v = opaque;
1370 HLSContext *c = v->parent->priv_data;
1372 int just_opened = 0;
1373 int reload_count = 0;
1374 struct segment *seg;
1380 if (!v->input || (c->http_persistent && v->input_read_done)) {
1381 int64_t reload_interval;
1383 /* Check that the playlist is still needed before opening a new
1385 v->needed = playlist_needed(v);
1388 av_log(v->parent, AV_LOG_INFO, "No longer receiving playlist %d\n",
1393 /* If this is a live stream and the reload interval has elapsed since
1394 * the last playlist reload, reload the playlists now. */
1395 reload_interval = default_reload_interval(v);
1399 if (reload_count > c->max_reload)
1402 av_gettime_relative() - v->last_load_time >= reload_interval) {
1403 if ((ret = parse_playlist(c, v->url, v, NULL)) < 0) {
1404 if (ret != AVERROR_EXIT)
1405 av_log(v->parent, AV_LOG_WARNING, "Failed to reload playlist %d\n",
1409 /* If we need to reload the playlist again below (if
1410 * there's still no more segments), switch to a reload
1411 * interval of half the target duration. */
1412 reload_interval = v->target_duration / 2;
1414 if (v->cur_seq_no < v->start_seq_no) {
1415 av_log(NULL, AV_LOG_WARNING,
1416 "skipping %d segments ahead, expired from playlists\n",
1417 v->start_seq_no - v->cur_seq_no);
1418 v->cur_seq_no = v->start_seq_no;
1420 if (v->cur_seq_no >= v->start_seq_no + v->n_segments) {
1423 while (av_gettime_relative() - v->last_load_time < reload_interval) {
1424 if (ff_check_interrupt(c->interrupt_callback))
1425 return AVERROR_EXIT;
1426 av_usleep(100*1000);
1428 /* Enough time has elapsed since the last reload */
1432 v->input_read_done = 0;
1433 seg = current_segment(v);
1435 /* load/update Media Initialization Section, if any */
1436 ret = update_init_section(v, seg);
1440 if (c->http_multiple == 1 && v->input_next_requested) {
1441 FFSWAP(AVIOContext *, v->input, v->input_next);
1442 v->input_next_requested = 0;
1445 ret = open_input(c, v, seg, &v->input);
1448 if (ff_check_interrupt(c->interrupt_callback))
1449 return AVERROR_EXIT;
1450 av_log(v->parent, AV_LOG_WARNING, "Failed to open segment %d of playlist %d\n",
1459 if (c->http_multiple == -1) {
1460 uint8_t *http_version_opt = NULL;
1461 int r = av_opt_get(v->input, "http_version", AV_OPT_SEARCH_CHILDREN, &http_version_opt);
1463 c->http_multiple = strncmp((const char *)http_version_opt, "1.1", 3) == 0;
1464 av_freep(&http_version_opt);
1468 seg = next_segment(v);
1469 if (c->http_multiple == 1 && !v->input_next_requested &&
1470 seg && seg->key_type == KEY_NONE && av_strstart(seg->url, "http", NULL)) {
1471 ret = open_input(c, v, seg, &v->input_next);
1473 if (ff_check_interrupt(c->interrupt_callback))
1474 return AVERROR_EXIT;
1475 av_log(v->parent, AV_LOG_WARNING, "Failed to open segment %d of playlist %d\n",
1479 v->input_next_requested = 1;
1483 if (v->init_sec_buf_read_offset < v->init_sec_data_len) {
1484 /* Push init section out first before first actual segment */
1485 int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size);
1486 memcpy(buf, v->init_sec_buf, copy_size);
1487 v->init_sec_buf_read_offset += copy_size;
1491 seg = current_segment(v);
1492 ret = read_from_url(v, seg, buf, buf_size);
1494 if (just_opened && v->is_id3_timestamped != 0) {
1495 /* Intercept ID3 tags here, elementary audio streams are required
1496 * to convey timestamps using them in the beginning of each segment. */
1497 intercept_id3(v, buf, buf_size, &ret);
1502 if (c->http_persistent &&
1503 seg->key_type == KEY_NONE && av_strstart(seg->url, "http", NULL)) {
1504 v->input_read_done = 1;
1506 ff_format_io_close(v->parent, &v->input);
1510 c->cur_seq_no = v->cur_seq_no;
1515 static void add_renditions_to_variant(HLSContext *c, struct variant *var,
1516 enum AVMediaType type, const char *group_id)
1520 for (i = 0; i < c->n_renditions; i++) {
1521 struct rendition *rend = c->renditions[i];
1523 if (rend->type == type && !strcmp(rend->group_id, group_id)) {
1526 /* rendition is an external playlist
1527 * => add the playlist to the variant */
1528 dynarray_add(&var->playlists, &var->n_playlists, rend->playlist);
1530 /* rendition is part of the variant main Media Playlist
1531 * => add the rendition to the main Media Playlist */
1532 dynarray_add(&var->playlists[0]->renditions,
1533 &var->playlists[0]->n_renditions,
1539 static void add_metadata_from_renditions(AVFormatContext *s, struct playlist *pls,
1540 enum AVMediaType type)
1545 for (i = 0; i < pls->n_main_streams; i++) {
1546 AVStream *st = pls->main_streams[i];
1548 if (st->codecpar->codec_type != type)
1551 for (; rend_idx < pls->n_renditions; rend_idx++) {
1552 struct rendition *rend = pls->renditions[rend_idx];
1554 if (rend->type != type)
1557 if (rend->language[0])
1558 av_dict_set(&st->metadata, "language", rend->language, 0);
1560 av_dict_set(&st->metadata, "comment", rend->name, 0);
1562 st->disposition |= rend->disposition;
1564 if (rend_idx >=pls->n_renditions)
1569 /* if timestamp was in valid range: returns 1 and sets seq_no
1570 * if not: returns 0 and sets seq_no to closest segment */
1571 static int find_timestamp_in_playlist(HLSContext *c, struct playlist *pls,
1572 int64_t timestamp, int *seq_no)
1575 int64_t pos = c->first_timestamp == AV_NOPTS_VALUE ?
1576 0 : c->first_timestamp;
1578 if (timestamp < pos) {
1579 *seq_no = pls->start_seq_no;
1583 for (i = 0; i < pls->n_segments; i++) {
1584 int64_t diff = pos + pls->segments[i]->duration - timestamp;
1586 *seq_no = pls->start_seq_no + i;
1589 pos += pls->segments[i]->duration;
1592 *seq_no = pls->start_seq_no + pls->n_segments - 1;
1597 static int select_cur_seq_no(HLSContext *c, struct playlist *pls)
1601 if (!pls->finished && !c->first_packet &&
1602 av_gettime_relative() - pls->last_load_time >= default_reload_interval(pls))
1603 /* reload the playlist since it was suspended */
1604 parse_playlist(c, pls->url, pls, NULL);
1606 /* If playback is already in progress (we are just selecting a new
1607 * playlist) and this is a complete file, find the matching segment
1608 * by counting durations. */
1609 if (pls->finished && c->cur_timestamp != AV_NOPTS_VALUE) {
1610 find_timestamp_in_playlist(c, pls, c->cur_timestamp, &seq_no);
1614 if (!pls->finished) {
1615 if (!c->first_packet && /* we are doing a segment selection during playback */
1616 c->cur_seq_no >= pls->start_seq_no &&
1617 c->cur_seq_no < pls->start_seq_no + pls->n_segments)
1618 /* While spec 3.4.3 says that we cannot assume anything about the
1619 * content at the same sequence number on different playlists,
1620 * in practice this seems to work and doing it otherwise would
1621 * require us to download a segment to inspect its timestamps. */
1622 return c->cur_seq_no;
1624 /* If this is a live stream, start live_start_index segments from the
1626 if (c->live_start_index < 0)
1627 return pls->start_seq_no + FFMAX(pls->n_segments + c->live_start_index, 0);
1629 return pls->start_seq_no + FFMIN(c->live_start_index, pls->n_segments - 1);
1632 /* Otherwise just start on the first segment. */
1633 return pls->start_seq_no;
1636 static int save_avio_options(AVFormatContext *s)
1638 HLSContext *c = s->priv_data;
1639 static const char * const opts[] = {
1640 "headers", "http_proxy", "user_agent", "user-agent", "cookies", "referer", "rw_timeout", NULL };
1641 const char * const * opt = opts;
1646 if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN | AV_OPT_ALLOW_NULL, &buf) >= 0) {
1647 ret = av_dict_set(&c->avio_opts, *opt, buf,
1648 AV_DICT_DONT_STRDUP_VAL);
1658 static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url,
1659 int flags, AVDictionary **opts)
1661 av_log(s, AV_LOG_ERROR,
1662 "A HLS playlist item '%s' referred to an external file '%s'. "
1663 "Opening this file was forbidden for security reasons\n",
1665 return AVERROR(EPERM);
1668 static void add_stream_to_programs(AVFormatContext *s, struct playlist *pls, AVStream *stream)
1670 HLSContext *c = s->priv_data;
1674 for (i = 0; i < c->n_variants; i++) {
1675 struct variant *v = c->variants[i];
1677 for (j = 0; j < v->n_playlists; j++) {
1678 if (v->playlists[j] != pls)
1681 av_program_add_stream_index(s, i, stream->index);
1684 bandwidth = v->bandwidth;
1685 else if (bandwidth != v->bandwidth)
1686 bandwidth = -1; /* stream in multiple variants with different bandwidths */
1691 av_dict_set_int(&stream->metadata, "variant_bitrate", bandwidth, 0);
1694 static int set_stream_info_from_input_stream(AVStream *st, struct playlist *pls, AVStream *ist)
1698 err = avcodec_parameters_copy(st->codecpar, ist->codecpar);
1702 if (pls->is_id3_timestamped) /* custom timestamps via id3 */
1703 avpriv_set_pts_info(st, 33, 1, MPEG_TIME_BASE);
1705 avpriv_set_pts_info(st, ist->pts_wrap_bits, ist->time_base.num, ist->time_base.den);
1707 st->internal->need_context_update = 1;
1712 /* add new subdemuxer streams to our context, if any */
1713 static int update_streams_from_subdemuxer(AVFormatContext *s, struct playlist *pls)
1717 while (pls->n_main_streams < pls->ctx->nb_streams) {
1718 int ist_idx = pls->n_main_streams;
1719 AVStream *st = avformat_new_stream(s, NULL);
1720 AVStream *ist = pls->ctx->streams[ist_idx];
1723 return AVERROR(ENOMEM);
1725 st->id = pls->index;
1726 dynarray_add(&pls->main_streams, &pls->n_main_streams, st);
1728 add_stream_to_programs(s, pls, st);
1730 err = set_stream_info_from_input_stream(st, pls, ist);
1738 static void update_noheader_flag(AVFormatContext *s)
1740 HLSContext *c = s->priv_data;
1741 int flag_needed = 0;
1744 for (i = 0; i < c->n_playlists; i++) {
1745 struct playlist *pls = c->playlists[i];
1747 if (pls->has_noheader_flag) {
1754 s->ctx_flags |= AVFMTCTX_NOHEADER;
1756 s->ctx_flags &= ~AVFMTCTX_NOHEADER;
1759 static int hls_close(AVFormatContext *s)
1761 HLSContext *c = s->priv_data;
1763 free_playlist_list(c);
1764 free_variant_list(c);
1765 free_rendition_list(c);
1767 av_dict_free(&c->avio_opts);
1768 ff_format_io_close(c->ctx, &c->playlist_pb);
1773 static int hls_read_header(AVFormatContext *s)
1775 void *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb;
1776 HLSContext *c = s->priv_data;
1778 int highest_cur_seq_no = 0;
1781 c->interrupt_callback = &s->interrupt_callback;
1782 c->strict_std_compliance = s->strict_std_compliance;
1784 c->first_packet = 1;
1785 c->first_timestamp = AV_NOPTS_VALUE;
1786 c->cur_timestamp = AV_NOPTS_VALUE;
1789 // get the previous user agent & set back to null if string size is zero
1790 update_options(&c->user_agent, "user_agent", u);
1792 // get the previous cookies & set back to null if string size is zero
1793 update_options(&c->cookies, "cookies", u);
1795 // get the previous headers & set back to null if string size is zero
1796 update_options(&c->headers, "headers", u);
1798 // get the previous http proxt & set back to null if string size is zero
1799 update_options(&c->http_proxy, "http_proxy", u);
1802 if ((ret = parse_playlist(c, s->url, NULL, s->pb)) < 0)
1805 if ((ret = save_avio_options(s)) < 0)
1808 /* Some HLS servers don't like being sent the range header */
1809 av_dict_set(&c->avio_opts, "seekable", "0", 0);
1811 if (c->n_variants == 0) {
1812 av_log(NULL, AV_LOG_WARNING, "Empty playlist\n");
1816 /* If the playlist only contained playlists (Master Playlist),
1817 * parse each individual playlist. */
1818 if (c->n_playlists > 1 || c->playlists[0]->n_segments == 0) {
1819 for (i = 0; i < c->n_playlists; i++) {
1820 struct playlist *pls = c->playlists[i];
1821 if ((ret = parse_playlist(c, pls->url, pls, NULL)) < 0)
1826 if (c->variants[0]->playlists[0]->n_segments == 0) {
1827 av_log(NULL, AV_LOG_WARNING, "Empty playlist\n");
1832 /* If this isn't a live stream, calculate the total duration of the
1834 if (c->variants[0]->playlists[0]->finished) {
1835 int64_t duration = 0;
1836 for (i = 0; i < c->variants[0]->playlists[0]->n_segments; i++)
1837 duration += c->variants[0]->playlists[0]->segments[i]->duration;
1838 s->duration = duration;
1841 /* Associate renditions with variants */
1842 for (i = 0; i < c->n_variants; i++) {
1843 struct variant *var = c->variants[i];
1845 if (var->audio_group[0])
1846 add_renditions_to_variant(c, var, AVMEDIA_TYPE_AUDIO, var->audio_group);
1847 if (var->video_group[0])
1848 add_renditions_to_variant(c, var, AVMEDIA_TYPE_VIDEO, var->video_group);
1849 if (var->subtitles_group[0])
1850 add_renditions_to_variant(c, var, AVMEDIA_TYPE_SUBTITLE, var->subtitles_group);
1853 /* Create a program for each variant */
1854 for (i = 0; i < c->n_variants; i++) {
1855 struct variant *v = c->variants[i];
1858 program = av_new_program(s, i);
1861 av_dict_set_int(&program->metadata, "variant_bitrate", v->bandwidth, 0);
1864 /* Select the starting segments */
1865 for (i = 0; i < c->n_playlists; i++) {
1866 struct playlist *pls = c->playlists[i];
1868 if (pls->n_segments == 0)
1871 pls->cur_seq_no = select_cur_seq_no(c, pls);
1872 highest_cur_seq_no = FFMAX(highest_cur_seq_no, pls->cur_seq_no);
1875 /* Open the demuxer for each playlist */
1876 for (i = 0; i < c->n_playlists; i++) {
1877 struct playlist *pls = c->playlists[i];
1878 AVInputFormat *in_fmt = NULL;
1880 if (!(pls->ctx = avformat_alloc_context())) {
1881 ret = AVERROR(ENOMEM);
1885 if (pls->n_segments == 0)
1893 * If this is a live stream and this playlist looks like it is one segment
1894 * behind, try to sync it up so that every substream starts at the same
1895 * time position (so e.g. avformat_find_stream_info() will see packets from
1896 * all active streams within the first few seconds). This is not very generic,
1897 * though, as the sequence numbers are technically independent.
1899 if (!pls->finished && pls->cur_seq_no == highest_cur_seq_no - 1 &&
1900 highest_cur_seq_no < pls->start_seq_no + pls->n_segments) {
1901 pls->cur_seq_no = highest_cur_seq_no;
1904 pls->read_buffer = av_malloc(INITIAL_BUFFER_SIZE);
1905 if (!pls->read_buffer){
1906 ret = AVERROR(ENOMEM);
1907 avformat_free_context(pls->ctx);
1911 ffio_init_context(&pls->pb, pls->read_buffer, INITIAL_BUFFER_SIZE, 0, pls,
1912 read_data, NULL, NULL);
1913 pls->pb.seekable = 0;
1914 ret = av_probe_input_buffer(&pls->pb, &in_fmt, pls->segments[0]->url,
1917 /* Free the ctx - it isn't initialized properly at this point,
1918 * so avformat_close_input shouldn't be called. If
1919 * avformat_open_input fails below, it frees and zeros the
1920 * context, so it doesn't need any special treatment like this. */
1921 av_log(s, AV_LOG_ERROR, "Error when loading first segment '%s'\n", pls->segments[0]->url);
1922 avformat_free_context(pls->ctx);
1926 pls->ctx->pb = &pls->pb;
1927 pls->ctx->io_open = nested_io_open;
1928 pls->ctx->flags |= s->flags & ~AVFMT_FLAG_CUSTOM_IO;
1930 if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
1933 ret = avformat_open_input(&pls->ctx, pls->segments[0]->url, in_fmt, NULL);
1937 if (pls->id3_deferred_extra && pls->ctx->nb_streams == 1) {
1938 ff_id3v2_parse_apic(pls->ctx, &pls->id3_deferred_extra);
1939 avformat_queue_attached_pictures(pls->ctx);
1940 ff_id3v2_parse_priv(pls->ctx, &pls->id3_deferred_extra);
1941 ff_id3v2_free_extra_meta(&pls->id3_deferred_extra);
1942 pls->id3_deferred_extra = NULL;
1945 if (pls->is_id3_timestamped == -1)
1946 av_log(s, AV_LOG_WARNING, "No expected HTTP requests have been made\n");
1949 * For ID3 timestamped raw audio streams we need to detect the packet
1950 * durations to calculate timestamps in fill_timing_for_id3_timestamped_stream(),
1951 * but for other streams we can rely on our user calling avformat_find_stream_info()
1952 * on us if they want to.
1954 if (pls->is_id3_timestamped) {
1955 ret = avformat_find_stream_info(pls->ctx, NULL);
1960 pls->has_noheader_flag = !!(pls->ctx->ctx_flags & AVFMTCTX_NOHEADER);
1962 /* Create new AVStreams for each stream in this playlist */
1963 ret = update_streams_from_subdemuxer(s, pls);
1968 * Copy any metadata from playlist to main streams, but do not set
1971 if (pls->n_main_streams)
1972 av_dict_copy(&pls->main_streams[0]->metadata, pls->ctx->metadata, 0);
1974 add_metadata_from_renditions(s, pls, AVMEDIA_TYPE_AUDIO);
1975 add_metadata_from_renditions(s, pls, AVMEDIA_TYPE_VIDEO);
1976 add_metadata_from_renditions(s, pls, AVMEDIA_TYPE_SUBTITLE);
1979 update_noheader_flag(s);
1987 static int recheck_discard_flags(AVFormatContext *s, int first)
1989 HLSContext *c = s->priv_data;
1993 /* Check if any new streams are needed */
1994 for (i = 0; i < c->n_playlists; i++) {
1995 struct playlist *pls = c->playlists[i];
1997 cur_needed = playlist_needed(c->playlists[i]);
1999 if (cur_needed && !pls->needed) {
2002 pls->cur_seq_no = select_cur_seq_no(c, pls);
2003 pls->pb.eof_reached = 0;
2004 if (c->cur_timestamp != AV_NOPTS_VALUE) {
2006 pls->seek_timestamp = c->cur_timestamp;
2007 pls->seek_flags = AVSEEK_FLAG_ANY;
2008 pls->seek_stream_index = -1;
2010 av_log(s, AV_LOG_INFO, "Now receiving playlist %d, segment %d\n", i, pls->cur_seq_no);
2011 } else if (first && !cur_needed && pls->needed) {
2013 ff_format_io_close(pls->parent, &pls->input);
2014 pls->input_read_done = 0;
2015 if (pls->input_next)
2016 ff_format_io_close(pls->parent, &pls->input_next);
2017 pls->input_next_requested = 0;
2020 av_log(s, AV_LOG_INFO, "No longer receiving playlist %d\n", i);
2026 static void fill_timing_for_id3_timestamped_stream(struct playlist *pls)
2028 if (pls->id3_offset >= 0) {
2029 pls->pkt.dts = pls->id3_mpegts_timestamp +
2030 av_rescale_q(pls->id3_offset,
2031 pls->ctx->streams[pls->pkt.stream_index]->time_base,
2033 if (pls->pkt.duration)
2034 pls->id3_offset += pls->pkt.duration;
2036 pls->id3_offset = -1;
2038 /* there have been packets with unknown duration
2039 * since the last id3 tag, should not normally happen */
2040 pls->pkt.dts = AV_NOPTS_VALUE;
2043 if (pls->pkt.duration)
2044 pls->pkt.duration = av_rescale_q(pls->pkt.duration,
2045 pls->ctx->streams[pls->pkt.stream_index]->time_base,
2048 pls->pkt.pts = AV_NOPTS_VALUE;
2051 static AVRational get_timebase(struct playlist *pls)
2053 if (pls->is_id3_timestamped)
2054 return MPEG_TIME_BASE_Q;
2056 return pls->ctx->streams[pls->pkt.stream_index]->time_base;
2059 static int compare_ts_with_wrapdetect(int64_t ts_a, struct playlist *pls_a,
2060 int64_t ts_b, struct playlist *pls_b)
2062 int64_t scaled_ts_a = av_rescale_q(ts_a, get_timebase(pls_a), MPEG_TIME_BASE_Q);
2063 int64_t scaled_ts_b = av_rescale_q(ts_b, get_timebase(pls_b), MPEG_TIME_BASE_Q);
2065 return av_compare_mod(scaled_ts_a, scaled_ts_b, 1LL << 33);
2068 static int hls_read_packet(AVFormatContext *s, AVPacket *pkt)
2070 HLSContext *c = s->priv_data;
2071 int ret, i, minplaylist = -1;
2073 recheck_discard_flags(s, c->first_packet);
2074 c->first_packet = 0;
2076 for (i = 0; i < c->n_playlists; i++) {
2077 struct playlist *pls = c->playlists[i];
2078 /* Make sure we've got one buffered packet from each open playlist
2080 if (pls->needed && !pls->pkt.data) {
2084 ret = av_read_frame(pls->ctx, &pls->pkt);
2086 if (!avio_feof(&pls->pb) && ret != AVERROR_EOF)
2088 reset_packet(&pls->pkt);
2091 /* stream_index check prevents matching picture attachments etc. */
2092 if (pls->is_id3_timestamped && pls->pkt.stream_index == 0) {
2093 /* audio elementary streams are id3 timestamped */
2094 fill_timing_for_id3_timestamped_stream(pls);
2097 if (c->first_timestamp == AV_NOPTS_VALUE &&
2098 pls->pkt.dts != AV_NOPTS_VALUE)
2099 c->first_timestamp = av_rescale_q(pls->pkt.dts,
2100 get_timebase(pls), AV_TIME_BASE_Q);
2103 if (pls->seek_timestamp == AV_NOPTS_VALUE)
2106 if (pls->seek_stream_index < 0 ||
2107 pls->seek_stream_index == pls->pkt.stream_index) {
2109 if (pls->pkt.dts == AV_NOPTS_VALUE) {
2110 pls->seek_timestamp = AV_NOPTS_VALUE;
2114 tb = get_timebase(pls);
2115 ts_diff = av_rescale_rnd(pls->pkt.dts, AV_TIME_BASE,
2116 tb.den, AV_ROUND_DOWN) -
2117 pls->seek_timestamp;
2118 if (ts_diff >= 0 && (pls->seek_flags & AVSEEK_FLAG_ANY ||
2119 pls->pkt.flags & AV_PKT_FLAG_KEY)) {
2120 pls->seek_timestamp = AV_NOPTS_VALUE;
2124 av_packet_unref(&pls->pkt);
2125 reset_packet(&pls->pkt);
2128 /* Check if this stream has the packet with the lowest dts */
2129 if (pls->pkt.data) {
2130 struct playlist *minpls = minplaylist < 0 ?
2131 NULL : c->playlists[minplaylist];
2132 if (minplaylist < 0) {
2135 int64_t dts = pls->pkt.dts;
2136 int64_t mindts = minpls->pkt.dts;
2138 if (dts == AV_NOPTS_VALUE ||
2139 (mindts != AV_NOPTS_VALUE && compare_ts_with_wrapdetect(dts, pls, mindts, minpls) < 0))
2145 /* If we got a packet, return it */
2146 if (minplaylist >= 0) {
2147 struct playlist *pls = c->playlists[minplaylist];
2151 ret = update_streams_from_subdemuxer(s, pls);
2153 av_packet_unref(&pls->pkt);
2154 reset_packet(&pls->pkt);
2158 // If sub-demuxer reports updated metadata, copy it to the first stream
2159 // and set its AVSTREAM_EVENT_FLAG_METADATA_UPDATED flag.
2160 if (pls->ctx->event_flags & AVFMT_EVENT_FLAG_METADATA_UPDATED) {
2161 if (pls->n_main_streams) {
2162 st = pls->main_streams[0];
2163 av_dict_copy(&st->metadata, pls->ctx->metadata, 0);
2164 st->event_flags |= AVSTREAM_EVENT_FLAG_METADATA_UPDATED;
2166 pls->ctx->event_flags &= ~AVFMT_EVENT_FLAG_METADATA_UPDATED;
2169 /* check if noheader flag has been cleared by the subdemuxer */
2170 if (pls->has_noheader_flag && !(pls->ctx->ctx_flags & AVFMTCTX_NOHEADER)) {
2171 pls->has_noheader_flag = 0;
2172 update_noheader_flag(s);
2175 if (pls->pkt.stream_index >= pls->n_main_streams) {
2176 av_log(s, AV_LOG_ERROR, "stream index inconsistency: index %d, %d main streams, %d subdemuxer streams\n",
2177 pls->pkt.stream_index, pls->n_main_streams, pls->ctx->nb_streams);
2178 av_packet_unref(&pls->pkt);
2179 reset_packet(&pls->pkt);
2183 ist = pls->ctx->streams[pls->pkt.stream_index];
2184 st = pls->main_streams[pls->pkt.stream_index];
2187 pkt->stream_index = st->index;
2188 reset_packet(&c->playlists[minplaylist]->pkt);
2190 if (pkt->dts != AV_NOPTS_VALUE)
2191 c->cur_timestamp = av_rescale_q(pkt->dts,
2195 /* There may be more situations where this would be useful, but this at least
2196 * handles newly probed codecs properly (i.e. request_probe by mpegts). */
2197 if (ist->codecpar->codec_id != st->codecpar->codec_id) {
2198 ret = set_stream_info_from_input_stream(st, pls, ist);
2200 av_packet_unref(pkt);
2210 static int hls_read_seek(AVFormatContext *s, int stream_index,
2211 int64_t timestamp, int flags)
2213 HLSContext *c = s->priv_data;
2214 struct playlist *seek_pls = NULL;
2217 int stream_subdemuxer_index;
2218 int64_t first_timestamp, seek_timestamp, duration;
2220 if ((flags & AVSEEK_FLAG_BYTE) || (c->ctx->ctx_flags & AVFMTCTX_UNSEEKABLE))
2221 return AVERROR(ENOSYS);
2223 first_timestamp = c->first_timestamp == AV_NOPTS_VALUE ?
2224 0 : c->first_timestamp;
2226 seek_timestamp = av_rescale_rnd(timestamp, AV_TIME_BASE,
2227 s->streams[stream_index]->time_base.den,
2228 flags & AVSEEK_FLAG_BACKWARD ?
2229 AV_ROUND_DOWN : AV_ROUND_UP);
2231 duration = s->duration == AV_NOPTS_VALUE ?
2234 if (0 < duration && duration < seek_timestamp - first_timestamp)
2235 return AVERROR(EIO);
2237 /* find the playlist with the specified stream */
2238 for (i = 0; i < c->n_playlists; i++) {
2239 struct playlist *pls = c->playlists[i];
2240 for (j = 0; j < pls->n_main_streams; j++) {
2241 if (pls->main_streams[j] == s->streams[stream_index]) {
2243 stream_subdemuxer_index = j;
2248 /* check if the timestamp is valid for the playlist with the
2249 * specified stream index */
2250 if (!seek_pls || !find_timestamp_in_playlist(c, seek_pls, seek_timestamp, &seq_no))
2251 return AVERROR(EIO);
2253 /* set segment now so we do not need to search again below */
2254 seek_pls->cur_seq_no = seq_no;
2255 seek_pls->seek_stream_index = stream_subdemuxer_index;
2257 for (i = 0; i < c->n_playlists; i++) {
2259 struct playlist *pls = c->playlists[i];
2261 ff_format_io_close(pls->parent, &pls->input);
2262 pls->input_read_done = 0;
2263 if (pls->input_next)
2264 ff_format_io_close(pls->parent, &pls->input_next);
2265 pls->input_next_requested = 0;
2266 av_packet_unref(&pls->pkt);
2267 reset_packet(&pls->pkt);
2268 pls->pb.eof_reached = 0;
2269 /* Clear any buffered data */
2270 pls->pb.buf_end = pls->pb.buf_ptr = pls->pb.buffer;
2271 /* Reset the pos, to let the mpegts demuxer know we've seeked. */
2273 /* Flush the packet queue of the subdemuxer. */
2274 ff_read_frame_flush(pls->ctx);
2276 pls->seek_timestamp = seek_timestamp;
2277 pls->seek_flags = flags;
2279 if (pls != seek_pls) {
2280 /* set closest segment seq_no for playlists not handled above */
2281 find_timestamp_in_playlist(c, pls, seek_timestamp, &pls->cur_seq_no);
2282 /* seek the playlist to the given position without taking
2283 * keyframes into account since this playlist does not have the
2284 * specified stream where we should look for the keyframes */
2285 pls->seek_stream_index = -1;
2286 pls->seek_flags |= AVSEEK_FLAG_ANY;
2290 c->cur_timestamp = seek_timestamp;
2295 static int hls_probe(AVProbeData *p)
2297 /* Require #EXTM3U at the start, and either one of the ones below
2298 * somewhere for a proper match. */
2299 if (strncmp(p->buf, "#EXTM3U", 7))
2302 if (strstr(p->buf, "#EXT-X-STREAM-INF:") ||
2303 strstr(p->buf, "#EXT-X-TARGETDURATION:") ||
2304 strstr(p->buf, "#EXT-X-MEDIA-SEQUENCE:"))
2305 return AVPROBE_SCORE_MAX;
2309 #define OFFSET(x) offsetof(HLSContext, x)
2310 #define FLAGS AV_OPT_FLAG_DECODING_PARAM
2311 static const AVOption hls_options[] = {
2312 {"live_start_index", "segment index to start live streams at (negative values are from the end)",
2313 OFFSET(live_start_index), AV_OPT_TYPE_INT, {.i64 = -3}, INT_MIN, INT_MAX, FLAGS},
2314 {"allowed_extensions", "List of file extensions that hls is allowed to access",
2315 OFFSET(allowed_extensions), AV_OPT_TYPE_STRING,
2316 {.str = "3gp,aac,avi,flac,mkv,m3u8,m4a,m4s,m4v,mpg,mov,mp2,mp3,mp4,mpeg,mpegts,ogg,ogv,oga,ts,vob,wav"},
2317 INT_MIN, INT_MAX, FLAGS},
2318 {"max_reload", "Maximum number of times a insufficient list is attempted to be reloaded",
2319 OFFSET(max_reload), AV_OPT_TYPE_INT, {.i64 = 1000}, 0, INT_MAX, FLAGS},
2320 {"http_persistent", "Use persistent HTTP connections",
2321 OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS },
2322 {"http_multiple", "Use multiple HTTP connections for fetching segments",
2323 OFFSET(http_multiple), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, FLAGS},
2327 static const AVClass hls_class = {
2328 .class_name = "hls,applehttp",
2329 .item_name = av_default_item_name,
2330 .option = hls_options,
2331 .version = LIBAVUTIL_VERSION_INT,
2334 AVInputFormat ff_hls_demuxer = {
2335 .name = "hls,applehttp",
2336 .long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
2337 .priv_class = &hls_class,
2338 .priv_data_size = sizeof(HLSContext),
2339 .flags = AVFMT_NOGENSEARCH,
2340 .read_probe = hls_probe,
2341 .read_header = hls_read_header,
2342 .read_packet = hls_read_packet,
2343 .read_close = hls_close,
2344 .read_seek = hls_read_seek,