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 int read_chomp_line(AVIOContext *s, char *buf, int maxlen)
221 int len = ff_get_line(s, buf, maxlen);
222 while (len > 0 && av_isspace(buf[len - 1]))
227 static void free_segment_list(struct playlist *pls)
230 for (i = 0; i < pls->n_segments; i++) {
231 av_freep(&pls->segments[i]->key);
232 av_freep(&pls->segments[i]->url);
233 av_freep(&pls->segments[i]);
235 av_freep(&pls->segments);
239 static void free_init_section_list(struct playlist *pls)
242 for (i = 0; i < pls->n_init_sections; i++) {
243 av_freep(&pls->init_sections[i]->url);
244 av_freep(&pls->init_sections[i]);
246 av_freep(&pls->init_sections);
247 pls->n_init_sections = 0;
250 static void free_playlist_list(HLSContext *c)
253 for (i = 0; i < c->n_playlists; i++) {
254 struct playlist *pls = c->playlists[i];
255 free_segment_list(pls);
256 free_init_section_list(pls);
257 av_freep(&pls->main_streams);
258 av_freep(&pls->renditions);
259 av_freep(&pls->id3_buf);
260 av_dict_free(&pls->id3_initial);
261 ff_id3v2_free_extra_meta(&pls->id3_deferred_extra);
262 av_freep(&pls->init_sec_buf);
263 av_packet_unref(&pls->pkt);
264 av_freep(&pls->pb.buffer);
266 ff_format_io_close(c->ctx, &pls->input);
267 pls->input_read_done = 0;
269 ff_format_io_close(c->ctx, &pls->input_next);
270 pls->input_next_requested = 0;
273 avformat_close_input(&pls->ctx);
277 av_freep(&c->playlists);
278 av_freep(&c->cookies);
279 av_freep(&c->user_agent);
280 av_freep(&c->headers);
281 av_freep(&c->http_proxy);
285 static void free_variant_list(HLSContext *c)
288 for (i = 0; i < c->n_variants; i++) {
289 struct variant *var = c->variants[i];
290 av_freep(&var->playlists);
293 av_freep(&c->variants);
297 static void free_rendition_list(HLSContext *c)
300 for (i = 0; i < c->n_renditions; i++)
301 av_freep(&c->renditions[i]);
302 av_freep(&c->renditions);
307 * Used to reset a statically allocated AVPacket to a clean slate,
308 * containing no data.
310 static void reset_packet(AVPacket *pkt)
316 static struct playlist *new_playlist(HLSContext *c, const char *url,
319 struct playlist *pls = av_mallocz(sizeof(struct playlist));
322 reset_packet(&pls->pkt);
323 ff_make_absolute_url(pls->url, sizeof(pls->url), base, url);
324 pls->seek_timestamp = AV_NOPTS_VALUE;
326 pls->is_id3_timestamped = -1;
327 pls->id3_mpegts_timestamp = AV_NOPTS_VALUE;
329 dynarray_add(&c->playlists, &c->n_playlists, pls);
333 struct variant_info {
335 /* variant group ids: */
336 char audio[MAX_FIELD_LEN];
337 char video[MAX_FIELD_LEN];
338 char subtitles[MAX_FIELD_LEN];
341 static struct variant *new_variant(HLSContext *c, struct variant_info *info,
342 const char *url, const char *base)
345 struct playlist *pls;
347 pls = new_playlist(c, url, base);
351 var = av_mallocz(sizeof(struct variant));
356 var->bandwidth = atoi(info->bandwidth);
357 strcpy(var->audio_group, info->audio);
358 strcpy(var->video_group, info->video);
359 strcpy(var->subtitles_group, info->subtitles);
362 dynarray_add(&c->variants, &c->n_variants, var);
363 dynarray_add(&var->playlists, &var->n_playlists, pls);
367 static void handle_variant_args(struct variant_info *info, const char *key,
368 int key_len, char **dest, int *dest_len)
370 if (!strncmp(key, "BANDWIDTH=", key_len)) {
371 *dest = info->bandwidth;
372 *dest_len = sizeof(info->bandwidth);
373 } else if (!strncmp(key, "AUDIO=", key_len)) {
375 *dest_len = sizeof(info->audio);
376 } else if (!strncmp(key, "VIDEO=", key_len)) {
378 *dest_len = sizeof(info->video);
379 } else if (!strncmp(key, "SUBTITLES=", key_len)) {
380 *dest = info->subtitles;
381 *dest_len = sizeof(info->subtitles);
386 char uri[MAX_URL_SIZE];
391 static void handle_key_args(struct key_info *info, const char *key,
392 int key_len, char **dest, int *dest_len)
394 if (!strncmp(key, "METHOD=", key_len)) {
395 *dest = info->method;
396 *dest_len = sizeof(info->method);
397 } else if (!strncmp(key, "URI=", key_len)) {
399 *dest_len = sizeof(info->uri);
400 } else if (!strncmp(key, "IV=", key_len)) {
402 *dest_len = sizeof(info->iv);
406 struct init_section_info {
407 char uri[MAX_URL_SIZE];
411 static struct segment *new_init_section(struct playlist *pls,
412 struct init_section_info *info,
413 const char *url_base)
417 char tmp_str[MAX_URL_SIZE];
422 sec = av_mallocz(sizeof(*sec));
426 ff_make_absolute_url(tmp_str, sizeof(tmp_str), url_base, info->uri);
427 sec->url = av_strdup(tmp_str);
433 if (info->byterange[0]) {
434 sec->size = strtoll(info->byterange, NULL, 10);
435 ptr = strchr(info->byterange, '@');
437 sec->url_offset = strtoll(ptr+1, NULL, 10);
439 /* the entire file is the init section */
443 dynarray_add(&pls->init_sections, &pls->n_init_sections, sec);
448 static void handle_init_section_args(struct init_section_info *info, const char *key,
449 int key_len, char **dest, int *dest_len)
451 if (!strncmp(key, "URI=", key_len)) {
453 *dest_len = sizeof(info->uri);
454 } else if (!strncmp(key, "BYTERANGE=", key_len)) {
455 *dest = info->byterange;
456 *dest_len = sizeof(info->byterange);
460 struct rendition_info {
462 char uri[MAX_URL_SIZE];
463 char group_id[MAX_FIELD_LEN];
464 char language[MAX_FIELD_LEN];
465 char assoc_language[MAX_FIELD_LEN];
466 char name[MAX_FIELD_LEN];
469 char characteristics[MAX_CHARACTERISTICS_LEN];
472 static struct rendition *new_rendition(HLSContext *c, struct rendition_info *info,
473 const char *url_base)
475 struct rendition *rend;
476 enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
477 char *characteristic;
481 if (!strcmp(info->type, "AUDIO"))
482 type = AVMEDIA_TYPE_AUDIO;
483 else if (!strcmp(info->type, "VIDEO"))
484 type = AVMEDIA_TYPE_VIDEO;
485 else if (!strcmp(info->type, "SUBTITLES"))
486 type = AVMEDIA_TYPE_SUBTITLE;
487 else if (!strcmp(info->type, "CLOSED-CAPTIONS"))
488 /* CLOSED-CAPTIONS is ignored since we do not support CEA-608 CC in
489 * AVC SEI RBSP anyway */
492 if (type == AVMEDIA_TYPE_UNKNOWN)
495 /* URI is mandatory for subtitles as per spec */
496 if (type == AVMEDIA_TYPE_SUBTITLE && !info->uri[0])
499 /* TODO: handle subtitles (each segment has to parsed separately) */
500 if (c->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL)
501 if (type == AVMEDIA_TYPE_SUBTITLE)
504 rend = av_mallocz(sizeof(struct rendition));
508 dynarray_add(&c->renditions, &c->n_renditions, rend);
511 strcpy(rend->group_id, info->group_id);
512 strcpy(rend->language, info->language);
513 strcpy(rend->name, info->name);
515 /* add the playlist if this is an external rendition */
517 rend->playlist = new_playlist(c, info->uri, url_base);
519 dynarray_add(&rend->playlist->renditions,
520 &rend->playlist->n_renditions, rend);
523 if (info->assoc_language[0]) {
524 int langlen = strlen(rend->language);
525 if (langlen < sizeof(rend->language) - 3) {
526 rend->language[langlen] = ',';
527 strncpy(rend->language + langlen + 1, info->assoc_language,
528 sizeof(rend->language) - langlen - 2);
532 if (!strcmp(info->defaultr, "YES"))
533 rend->disposition |= AV_DISPOSITION_DEFAULT;
534 if (!strcmp(info->forced, "YES"))
535 rend->disposition |= AV_DISPOSITION_FORCED;
537 chr_ptr = info->characteristics;
538 while ((characteristic = av_strtok(chr_ptr, ",", &saveptr))) {
539 if (!strcmp(characteristic, "public.accessibility.describes-music-and-sound"))
540 rend->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
541 else if (!strcmp(characteristic, "public.accessibility.describes-video"))
542 rend->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
550 static void handle_rendition_args(struct rendition_info *info, const char *key,
551 int key_len, char **dest, int *dest_len)
553 if (!strncmp(key, "TYPE=", key_len)) {
555 *dest_len = sizeof(info->type);
556 } else if (!strncmp(key, "URI=", key_len)) {
558 *dest_len = sizeof(info->uri);
559 } else if (!strncmp(key, "GROUP-ID=", key_len)) {
560 *dest = info->group_id;
561 *dest_len = sizeof(info->group_id);
562 } else if (!strncmp(key, "LANGUAGE=", key_len)) {
563 *dest = info->language;
564 *dest_len = sizeof(info->language);
565 } else if (!strncmp(key, "ASSOC-LANGUAGE=", key_len)) {
566 *dest = info->assoc_language;
567 *dest_len = sizeof(info->assoc_language);
568 } else if (!strncmp(key, "NAME=", key_len)) {
570 *dest_len = sizeof(info->name);
571 } else if (!strncmp(key, "DEFAULT=", key_len)) {
572 *dest = info->defaultr;
573 *dest_len = sizeof(info->defaultr);
574 } else if (!strncmp(key, "FORCED=", key_len)) {
575 *dest = info->forced;
576 *dest_len = sizeof(info->forced);
577 } else if (!strncmp(key, "CHARACTERISTICS=", key_len)) {
578 *dest = info->characteristics;
579 *dest_len = sizeof(info->characteristics);
583 * - AUTOSELECT: client may autoselect based on e.g. system language
584 * - INSTREAM-ID: EIA-608 closed caption number ("CC1".."CC4")
588 /* used by parse_playlist to allocate a new variant+playlist when the
589 * playlist is detected to be a Media Playlist (not Master Playlist)
590 * and we have no parent Master Playlist (parsing of which would have
591 * allocated the variant and playlist already)
592 * *pls == NULL => Master Playlist or parentless Media Playlist
593 * *pls != NULL => parented Media Playlist, playlist+variant allocated */
594 static int ensure_playlist(HLSContext *c, struct playlist **pls, const char *url)
598 if (!new_variant(c, NULL, url, NULL))
599 return AVERROR(ENOMEM);
600 *pls = c->playlists[c->n_playlists - 1];
604 static void update_options(char **dest, const char *name, void *src)
607 av_opt_get(src, name, AV_OPT_SEARCH_CHILDREN, (uint8_t**)dest);
608 if (*dest && !strlen(*dest))
612 static int open_url_keepalive(AVFormatContext *s, AVIOContext **pb,
615 #if !CONFIG_HTTP_PROTOCOL
616 return AVERROR_PROTOCOL_NOT_FOUND;
619 URLContext *uc = ffio_geturlcontext(*pb);
621 (*pb)->eof_reached = 0;
622 ret = ff_http_do_new_request(uc, url);
624 ff_format_io_close(s, pb);
630 static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url,
631 AVDictionary *opts, AVDictionary *opts2, int *is_http_out)
633 HLSContext *c = s->priv_data;
634 AVDictionary *tmp = NULL;
635 const char *proto_name = NULL;
639 av_dict_copy(&tmp, opts, 0);
640 av_dict_copy(&tmp, opts2, 0);
642 if (av_strstart(url, "crypto", NULL)) {
643 if (url[6] == '+' || url[6] == ':')
644 proto_name = avio_find_protocol_name(url + 7);
648 proto_name = avio_find_protocol_name(url);
651 return AVERROR_INVALIDDATA;
653 // only http(s) & file are allowed
654 if (av_strstart(proto_name, "file", NULL)) {
655 if (strcmp(c->allowed_extensions, "ALL") && !av_match_ext(url, c->allowed_extensions)) {
656 av_log(s, AV_LOG_ERROR,
657 "Filename extension of \'%s\' is not a common multimedia extension, blocked for security reasons.\n"
658 "If you wish to override this adjust allowed_extensions, you can set it to \'ALL\' to allow all\n",
660 return AVERROR_INVALIDDATA;
662 } else if (av_strstart(proto_name, "http", NULL)) {
665 return AVERROR_INVALIDDATA;
667 if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':')
669 else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':')
671 else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))
672 return AVERROR_INVALIDDATA;
674 if (is_http && c->http_persistent && *pb) {
675 ret = open_url_keepalive(c->ctx, pb, url);
676 if (ret == AVERROR_EXIT) {
678 } else if (ret < 0) {
679 if (ret != AVERROR_EOF)
680 av_log(s, AV_LOG_WARNING,
681 "keepalive request failed for '%s', retrying with new connection: %s\n",
682 url, av_err2str(ret));
683 ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
686 ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
689 // update cookies on http response with setcookies.
690 char *new_cookies = NULL;
692 if (!(s->flags & AVFMT_FLAG_CUSTOM_IO))
693 av_opt_get(*pb, "cookies", AV_OPT_SEARCH_CHILDREN, (uint8_t**)&new_cookies);
697 c->cookies = new_cookies;
700 av_dict_set(&opts, "cookies", c->cookies, 0);
706 *is_http_out = is_http;
711 static int parse_playlist(HLSContext *c, const char *url,
712 struct playlist *pls, AVIOContext *in)
714 int ret = 0, is_segment = 0, is_variant = 0;
715 int64_t duration = 0;
716 enum KeyType key_type = KEY_NONE;
719 char key[MAX_URL_SIZE] = "";
720 char line[MAX_URL_SIZE];
723 int64_t seg_offset = 0;
724 int64_t seg_size = -1;
725 uint8_t *new_url = NULL;
726 struct variant_info variant_info;
727 char tmp_str[MAX_URL_SIZE];
728 struct segment *cur_init_section = NULL;
729 int is_http = av_strstart(url, "http", NULL);
731 if (is_http && !in && c->http_persistent && c->playlist_pb) {
733 ret = open_url_keepalive(c->ctx, &c->playlist_pb, url);
734 if (ret == AVERROR_EXIT) {
736 } else if (ret < 0) {
737 if (ret != AVERROR_EOF)
738 av_log(c->ctx, AV_LOG_WARNING,
739 "keepalive request failed for '%s', retrying with new connection: %s\n",
740 url, av_err2str(ret));
747 AVDictionary *opts = NULL;
748 /* Some HLS servers don't like being sent the range header */
749 av_dict_set(&opts, "seekable", "0", 0);
751 // broker prior HTTP options that should be consistent across requests
752 av_dict_set(&opts, "user_agent", c->user_agent, 0);
753 av_dict_set(&opts, "cookies", c->cookies, 0);
754 av_dict_set(&opts, "headers", c->headers, 0);
755 av_dict_set(&opts, "http_proxy", c->http_proxy, 0);
757 if (c->http_persistent)
758 av_dict_set(&opts, "multiple_requests", "1", 0);
760 ret = c->ctx->io_open(c->ctx, &in, url, AVIO_FLAG_READ, &opts);
765 if (is_http && c->http_persistent)
770 ret = open_in(c, &in, url);
777 if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >= 0)
780 read_chomp_line(in, line, sizeof(line));
781 if (strcmp(line, "#EXTM3U")) {
782 ret = AVERROR_INVALIDDATA;
787 free_segment_list(pls);
789 pls->type = PLS_TYPE_UNSPECIFIED;
791 while (!avio_feof(in)) {
792 read_chomp_line(in, line, sizeof(line));
793 if (av_strstart(line, "#EXT-X-STREAM-INF:", &ptr)) {
795 memset(&variant_info, 0, sizeof(variant_info));
796 ff_parse_key_value(ptr, (ff_parse_key_val_cb) handle_variant_args,
798 } else if (av_strstart(line, "#EXT-X-KEY:", &ptr)) {
799 struct key_info info = {{0}};
800 ff_parse_key_value(ptr, (ff_parse_key_val_cb) handle_key_args,
804 if (!strcmp(info.method, "AES-128"))
805 key_type = KEY_AES_128;
806 if (!strcmp(info.method, "SAMPLE-AES"))
807 key_type = KEY_SAMPLE_AES;
808 if (!strncmp(info.iv, "0x", 2) || !strncmp(info.iv, "0X", 2)) {
809 ff_hex_to_data(iv, info.iv + 2);
812 av_strlcpy(key, info.uri, sizeof(key));
813 } else if (av_strstart(line, "#EXT-X-MEDIA:", &ptr)) {
814 struct rendition_info info = {{0}};
815 ff_parse_key_value(ptr, (ff_parse_key_val_cb) handle_rendition_args,
817 new_rendition(c, &info, url);
818 } else if (av_strstart(line, "#EXT-X-TARGETDURATION:", &ptr)) {
819 ret = ensure_playlist(c, &pls, url);
822 pls->target_duration = strtoll(ptr, NULL, 10) * AV_TIME_BASE;
823 } else if (av_strstart(line, "#EXT-X-MEDIA-SEQUENCE:", &ptr)) {
824 ret = ensure_playlist(c, &pls, url);
827 pls->start_seq_no = atoi(ptr);
828 } else if (av_strstart(line, "#EXT-X-PLAYLIST-TYPE:", &ptr)) {
829 ret = ensure_playlist(c, &pls, url);
832 if (!strcmp(ptr, "EVENT"))
833 pls->type = PLS_TYPE_EVENT;
834 else if (!strcmp(ptr, "VOD"))
835 pls->type = PLS_TYPE_VOD;
836 } else if (av_strstart(line, "#EXT-X-MAP:", &ptr)) {
837 struct init_section_info info = {{0}};
838 ret = ensure_playlist(c, &pls, url);
841 ff_parse_key_value(ptr, (ff_parse_key_val_cb) handle_init_section_args,
843 cur_init_section = new_init_section(pls, &info, url);
844 } else if (av_strstart(line, "#EXT-X-ENDLIST", &ptr)) {
847 } else if (av_strstart(line, "#EXTINF:", &ptr)) {
849 duration = atof(ptr) * AV_TIME_BASE;
850 } else if (av_strstart(line, "#EXT-X-BYTERANGE:", &ptr)) {
851 seg_size = strtoll(ptr, NULL, 10);
852 ptr = strchr(ptr, '@');
854 seg_offset = strtoll(ptr+1, NULL, 10);
855 } else if (av_strstart(line, "#", NULL)) {
857 } else if (line[0]) {
859 if (!new_variant(c, &variant_info, line, url)) {
860 ret = AVERROR(ENOMEM);
868 if (!new_variant(c, 0, url, NULL)) {
869 ret = AVERROR(ENOMEM);
872 pls = c->playlists[c->n_playlists - 1];
874 seg = av_malloc(sizeof(struct segment));
876 ret = AVERROR(ENOMEM);
879 seg->duration = duration;
880 seg->key_type = key_type;
882 memcpy(seg->iv, iv, sizeof(iv));
884 int seq = pls->start_seq_no + pls->n_segments;
885 memset(seg->iv, 0, sizeof(seg->iv));
886 AV_WB32(seg->iv + 12, seq);
889 if (key_type != KEY_NONE) {
890 ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, key);
891 seg->key = av_strdup(tmp_str);
894 ret = AVERROR(ENOMEM);
901 ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, line);
902 seg->url = av_strdup(tmp_str);
906 ret = AVERROR(ENOMEM);
910 dynarray_add(&pls->segments, &pls->n_segments, seg);
913 seg->size = seg_size;
915 seg->url_offset = seg_offset;
916 seg_offset += seg_size;
923 seg->init_section = cur_init_section;
928 pls->last_load_time = av_gettime_relative();
933 ff_format_io_close(c->ctx, &in);
934 c->ctx->ctx_flags = c->ctx->ctx_flags & ~(unsigned)AVFMTCTX_UNSEEKABLE;
935 if (!c->n_variants || !c->variants[0]->n_playlists ||
936 !(c->variants[0]->playlists[0]->finished ||
937 c->variants[0]->playlists[0]->type == PLS_TYPE_EVENT))
938 c->ctx->ctx_flags |= AVFMTCTX_UNSEEKABLE;
942 static struct segment *current_segment(struct playlist *pls)
944 return pls->segments[pls->cur_seq_no - pls->start_seq_no];
947 static struct segment *next_segment(struct playlist *pls)
949 int n = pls->cur_seq_no - pls->start_seq_no + 1;
950 if (n >= pls->n_segments)
952 return pls->segments[n];
955 enum ReadFromURLMode {
960 static int read_from_url(struct playlist *pls, struct segment *seg,
961 uint8_t *buf, int buf_size,
962 enum ReadFromURLMode mode)
966 /* limit read if the segment was only a part of a file */
968 buf_size = FFMIN(buf_size, seg->size - pls->cur_seg_offset);
970 if (mode == READ_COMPLETE) {
971 ret = avio_read(pls->input, buf, buf_size);
973 av_log(NULL, AV_LOG_ERROR, "Could not read complete segment.\n");
975 ret = avio_read(pls->input, buf, buf_size);
978 pls->cur_seg_offset += ret;
983 /* Parse the raw ID3 data and pass contents to caller */
984 static void parse_id3(AVFormatContext *s, AVIOContext *pb,
985 AVDictionary **metadata, int64_t *dts,
986 ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta **extra_meta)
988 static const char id3_priv_owner_ts[] = "com.apple.streaming.transportStreamTimestamp";
989 ID3v2ExtraMeta *meta;
991 ff_id3v2_read_dict(pb, metadata, ID3v2_DEFAULT_MAGIC, extra_meta);
992 for (meta = *extra_meta; meta; meta = meta->next) {
993 if (!strcmp(meta->tag, "PRIV")) {
994 ID3v2ExtraMetaPRIV *priv = meta->data;
995 if (priv->datasize == 8 && !strcmp(priv->owner, id3_priv_owner_ts)) {
996 /* 33-bit MPEG timestamp */
997 int64_t ts = AV_RB64(priv->data);
998 av_log(s, AV_LOG_DEBUG, "HLS ID3 audio timestamp %"PRId64"\n", ts);
999 if ((ts & ~((1ULL << 33) - 1)) == 0)
1002 av_log(s, AV_LOG_ERROR, "Invalid HLS ID3 audio timestamp %"PRId64"\n", ts);
1004 } else if (!strcmp(meta->tag, "APIC") && apic)
1009 /* Check if the ID3 metadata contents have changed */
1010 static int id3_has_changed_values(struct playlist *pls, AVDictionary *metadata,
1011 ID3v2ExtraMetaAPIC *apic)
1013 AVDictionaryEntry *entry = NULL;
1014 AVDictionaryEntry *oldentry;
1015 /* check that no keys have changed values */
1016 while ((entry = av_dict_get(metadata, "", entry, AV_DICT_IGNORE_SUFFIX))) {
1017 oldentry = av_dict_get(pls->id3_initial, entry->key, NULL, AV_DICT_MATCH_CASE);
1018 if (!oldentry || strcmp(oldentry->value, entry->value) != 0)
1022 /* check if apic appeared */
1023 if (apic && (pls->ctx->nb_streams != 2 || !pls->ctx->streams[1]->attached_pic.data))
1027 int size = pls->ctx->streams[1]->attached_pic.size;
1028 if (size != apic->buf->size - AV_INPUT_BUFFER_PADDING_SIZE)
1031 if (memcmp(apic->buf->data, pls->ctx->streams[1]->attached_pic.data, size) != 0)
1038 /* Parse ID3 data and handle the found data */
1039 static void handle_id3(AVIOContext *pb, struct playlist *pls)
1041 AVDictionary *metadata = NULL;
1042 ID3v2ExtraMetaAPIC *apic = NULL;
1043 ID3v2ExtraMeta *extra_meta = NULL;
1044 int64_t timestamp = AV_NOPTS_VALUE;
1046 parse_id3(pls->ctx, pb, &metadata, ×tamp, &apic, &extra_meta);
1048 if (timestamp != AV_NOPTS_VALUE) {
1049 pls->id3_mpegts_timestamp = timestamp;
1050 pls->id3_offset = 0;
1053 if (!pls->id3_found) {
1054 /* initial ID3 tags */
1055 av_assert0(!pls->id3_deferred_extra);
1058 /* get picture attachment and set text metadata */
1059 if (pls->ctx->nb_streams)
1060 ff_id3v2_parse_apic(pls->ctx, &extra_meta);
1062 /* demuxer not yet opened, defer picture attachment */
1063 pls->id3_deferred_extra = extra_meta;
1065 ff_id3v2_parse_priv_dict(&metadata, &extra_meta);
1066 av_dict_copy(&pls->ctx->metadata, metadata, 0);
1067 pls->id3_initial = metadata;
1070 if (!pls->id3_changed && id3_has_changed_values(pls, metadata, apic)) {
1071 avpriv_report_missing_feature(pls->ctx, "Changing ID3 metadata in HLS audio elementary stream");
1072 pls->id3_changed = 1;
1074 av_dict_free(&metadata);
1077 if (!pls->id3_deferred_extra)
1078 ff_id3v2_free_extra_meta(&extra_meta);
1081 static void intercept_id3(struct playlist *pls, uint8_t *buf,
1082 int buf_size, int *len)
1084 /* intercept id3 tags, we do not want to pass them to the raw
1085 * demuxer on all segment switches */
1087 int id3_buf_pos = 0;
1089 struct segment *seg = current_segment(pls);
1091 /* gather all the id3 tags */
1093 /* see if we can retrieve enough data for ID3 header */
1094 if (*len < ID3v2_HEADER_SIZE && buf_size >= ID3v2_HEADER_SIZE) {
1095 bytes = read_from_url(pls, seg, buf + *len, ID3v2_HEADER_SIZE - *len, READ_COMPLETE);
1098 if (bytes == ID3v2_HEADER_SIZE - *len)
1099 /* no EOF yet, so fill the caller buffer again after
1100 * we have stripped the ID3 tags */
1105 } else if (*len <= 0) {
1112 if (*len < ID3v2_HEADER_SIZE)
1115 if (ff_id3v2_match(buf, ID3v2_DEFAULT_MAGIC)) {
1116 int64_t maxsize = seg->size >= 0 ? seg->size : 1024*1024;
1117 int taglen = ff_id3v2_tag_len(buf);
1118 int tag_got_bytes = FFMIN(taglen, *len);
1119 int remaining = taglen - tag_got_bytes;
1121 if (taglen > maxsize) {
1122 av_log(pls->ctx, AV_LOG_ERROR, "Too large HLS ID3 tag (%d > %"PRId64" bytes)\n",
1128 * Copy the id3 tag to our temporary id3 buffer.
1129 * We could read a small id3 tag directly without memcpy, but
1130 * we would still need to copy the large tags, and handling
1131 * both of those cases together with the possibility for multiple
1132 * tags would make the handling a bit complex.
1134 pls->id3_buf = av_fast_realloc(pls->id3_buf, &pls->id3_buf_size, id3_buf_pos + taglen);
1137 memcpy(pls->id3_buf + id3_buf_pos, buf, tag_got_bytes);
1138 id3_buf_pos += tag_got_bytes;
1140 /* strip the intercepted bytes */
1141 *len -= tag_got_bytes;
1142 memmove(buf, buf + tag_got_bytes, *len);
1143 av_log(pls->ctx, AV_LOG_DEBUG, "Stripped %d HLS ID3 bytes\n", tag_got_bytes);
1145 if (remaining > 0) {
1146 /* read the rest of the tag in */
1147 if (read_from_url(pls, seg, pls->id3_buf + id3_buf_pos, remaining, READ_COMPLETE) != remaining)
1149 id3_buf_pos += remaining;
1150 av_log(pls->ctx, AV_LOG_DEBUG, "Stripped additional %d HLS ID3 bytes\n", remaining);
1154 /* no more ID3 tags */
1159 /* re-fill buffer for the caller unless EOF */
1160 if (*len >= 0 && (fill_buf || *len == 0)) {
1161 bytes = read_from_url(pls, seg, buf + *len, buf_size - *len, READ_NORMAL);
1163 /* ignore error if we already had some data */
1171 /* Now parse all the ID3 tags */
1172 AVIOContext id3ioctx;
1173 ffio_init_context(&id3ioctx, pls->id3_buf, id3_buf_pos, 0, NULL, NULL, NULL, NULL);
1174 handle_id3(&id3ioctx, pls);
1177 if (pls->is_id3_timestamped == -1)
1178 pls->is_id3_timestamped = (pls->id3_mpegts_timestamp != AV_NOPTS_VALUE);
1181 static int open_input(HLSContext *c, struct playlist *pls, struct segment *seg, AVIOContext **in)
1183 AVDictionary *opts = NULL;
1187 // broker prior HTTP options that should be consistent across requests
1188 av_dict_set(&opts, "user_agent", c->user_agent, 0);
1189 av_dict_set(&opts, "referer", c->referer, 0);
1190 av_dict_set(&opts, "cookies", c->cookies, 0);
1191 av_dict_set(&opts, "headers", c->headers, 0);
1192 av_dict_set(&opts, "http_proxy", c->http_proxy, 0);
1193 av_dict_set(&opts, "seekable", "0", 0);
1195 if (c->http_persistent)
1196 av_dict_set(&opts, "multiple_requests", "1", 0);
1198 if (seg->size >= 0) {
1199 /* try to restrict the HTTP request to the part we want
1200 * (if this is in fact a HTTP request) */
1201 av_dict_set_int(&opts, "offset", seg->url_offset, 0);
1202 av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
1205 av_log(pls->parent, AV_LOG_VERBOSE, "HLS request for url '%s', offset %"PRId64", playlist %d\n",
1206 seg->url, seg->url_offset, pls->index);
1208 if (seg->key_type == KEY_NONE) {
1209 ret = open_url(pls->parent, in, seg->url, c->avio_opts, opts, &is_http);
1210 } else if (seg->key_type == KEY_AES_128) {
1211 AVDictionary *opts2 = NULL;
1212 char iv[33], key[33], url[MAX_URL_SIZE];
1213 if (strcmp(seg->key, pls->key_url)) {
1214 AVIOContext *pb = NULL;
1215 if (open_url(pls->parent, &pb, seg->key, c->avio_opts, opts, NULL) == 0) {
1216 ret = avio_read(pb, pls->key, sizeof(pls->key));
1217 if (ret != sizeof(pls->key)) {
1218 av_log(NULL, AV_LOG_ERROR, "Unable to read key file %s\n",
1221 ff_format_io_close(pls->parent, &pb);
1223 av_log(NULL, AV_LOG_ERROR, "Unable to open key file %s\n",
1226 av_strlcpy(pls->key_url, seg->key, sizeof(pls->key_url));
1228 ff_data_to_hex(iv, seg->iv, sizeof(seg->iv), 0);
1229 ff_data_to_hex(key, pls->key, sizeof(pls->key), 0);
1230 iv[32] = key[32] = '\0';
1231 if (strstr(seg->url, "://"))
1232 snprintf(url, sizeof(url), "crypto+%s", seg->url);
1234 snprintf(url, sizeof(url), "crypto:%s", seg->url);
1236 av_dict_copy(&opts2, c->avio_opts, 0);
1237 av_dict_set(&opts2, "key", key, 0);
1238 av_dict_set(&opts2, "iv", iv, 0);
1240 ret = open_url(pls->parent, in, url, opts2, opts, &is_http);
1242 av_dict_free(&opts2);
1248 } else if (seg->key_type == KEY_SAMPLE_AES) {
1249 av_log(pls->parent, AV_LOG_ERROR,
1250 "SAMPLE-AES encryption is not supported yet\n");
1251 ret = AVERROR_PATCHWELCOME;
1254 ret = AVERROR(ENOSYS);
1256 /* Seek to the requested position. If this was a HTTP request, the offset
1257 * should already be where want it to, but this allows e.g. local testing
1258 * without a HTTP server.
1260 * This is not done for HTTP at all as avio_seek() does internal bookkeeping
1261 * of file offset which is out-of-sync with the actual offset when "offset"
1262 * AVOption is used with http protocol, causing the seek to not be a no-op
1263 * as would be expected. Wrong offset received from the server will not be
1264 * noticed without the call, though.
1266 if (ret == 0 && !is_http && seg->key_type == KEY_NONE && seg->url_offset) {
1267 int64_t seekret = avio_seek(*in, seg->url_offset, SEEK_SET);
1269 av_log(pls->parent, AV_LOG_ERROR, "Unable to seek to offset %"PRId64" of HLS segment '%s'\n", seg->url_offset, seg->url);
1271 ff_format_io_close(pls->parent, in);
1276 av_dict_free(&opts);
1277 pls->cur_seg_offset = 0;
1281 static int update_init_section(struct playlist *pls, struct segment *seg)
1283 static const int max_init_section_size = 1024*1024;
1284 HLSContext *c = pls->parent->priv_data;
1289 if (seg->init_section == pls->cur_init_section)
1292 pls->cur_init_section = NULL;
1294 if (!seg->init_section)
1297 ret = open_input(c, pls, seg->init_section, &pls->input);
1299 av_log(pls->parent, AV_LOG_WARNING,
1300 "Failed to open an initialization section in playlist %d\n",
1305 if (seg->init_section->size >= 0)
1306 sec_size = seg->init_section->size;
1307 else if ((urlsize = avio_size(pls->input)) >= 0)
1310 sec_size = max_init_section_size;
1312 av_log(pls->parent, AV_LOG_DEBUG,
1313 "Downloading an initialization section of size %"PRId64"\n",
1316 sec_size = FFMIN(sec_size, max_init_section_size);
1318 av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size);
1320 ret = read_from_url(pls, seg->init_section, pls->init_sec_buf,
1321 pls->init_sec_buf_size, READ_COMPLETE);
1322 ff_format_io_close(pls->parent, &pls->input);
1327 pls->cur_init_section = seg->init_section;
1328 pls->init_sec_data_len = ret;
1329 pls->init_sec_buf_read_offset = 0;
1331 /* spec says audio elementary streams do not have media initialization
1332 * sections, so there should be no ID3 timestamps */
1333 pls->is_id3_timestamped = 0;
1338 static int64_t default_reload_interval(struct playlist *pls)
1340 return pls->n_segments > 0 ?
1341 pls->segments[pls->n_segments - 1]->duration :
1342 pls->target_duration;
1345 static int playlist_needed(struct playlist *pls)
1347 AVFormatContext *s = pls->parent;
1349 int stream_needed = 0;
1352 /* If there is no context or streams yet, the playlist is needed */
1353 if (!pls->ctx || !pls->n_main_streams)
1356 /* check if any of the streams in the playlist are needed */
1357 for (i = 0; i < pls->n_main_streams; i++) {
1358 if (pls->main_streams[i]->discard < AVDISCARD_ALL) {
1364 /* If all streams in the playlist were discarded, the playlist is not
1365 * needed (regardless of whether whole programs are discarded or not). */
1369 /* Otherwise, check if all the programs (variants) this playlist is in are
1370 * discarded. Since all streams in the playlist are part of the same programs
1371 * we can just check the programs of the first stream. */
1373 first_st = pls->main_streams[0]->index;
1375 for (i = 0; i < s->nb_programs; i++) {
1376 AVProgram *program = s->programs[i];
1377 if (program->discard < AVDISCARD_ALL) {
1378 for (j = 0; j < program->nb_stream_indexes; j++) {
1379 if (program->stream_index[j] == first_st) {
1380 /* playlist is in an undiscarded program */
1387 /* some streams were not discarded but all the programs were */
1391 static int read_data(void *opaque, uint8_t *buf, int buf_size)
1393 struct playlist *v = opaque;
1394 HLSContext *c = v->parent->priv_data;
1396 int just_opened = 0;
1397 int reload_count = 0;
1398 struct segment *seg;
1404 if (!v->input || (c->http_persistent && v->input_read_done)) {
1405 int64_t reload_interval;
1407 /* Check that the playlist is still needed before opening a new
1409 v->needed = playlist_needed(v);
1412 av_log(v->parent, AV_LOG_INFO, "No longer receiving playlist %d\n",
1417 /* If this is a live stream and the reload interval has elapsed since
1418 * the last playlist reload, reload the playlists now. */
1419 reload_interval = default_reload_interval(v);
1423 if (reload_count > c->max_reload)
1426 av_gettime_relative() - v->last_load_time >= reload_interval) {
1427 if ((ret = parse_playlist(c, v->url, v, NULL)) < 0) {
1428 if (ret != AVERROR_EXIT)
1429 av_log(v->parent, AV_LOG_WARNING, "Failed to reload playlist %d\n",
1433 /* If we need to reload the playlist again below (if
1434 * there's still no more segments), switch to a reload
1435 * interval of half the target duration. */
1436 reload_interval = v->target_duration / 2;
1438 if (v->cur_seq_no < v->start_seq_no) {
1439 av_log(NULL, AV_LOG_WARNING,
1440 "skipping %d segments ahead, expired from playlists\n",
1441 v->start_seq_no - v->cur_seq_no);
1442 v->cur_seq_no = v->start_seq_no;
1444 if (v->cur_seq_no >= v->start_seq_no + v->n_segments) {
1447 while (av_gettime_relative() - v->last_load_time < reload_interval) {
1448 if (ff_check_interrupt(c->interrupt_callback))
1449 return AVERROR_EXIT;
1450 av_usleep(100*1000);
1452 /* Enough time has elapsed since the last reload */
1456 v->input_read_done = 0;
1457 seg = current_segment(v);
1459 /* load/update Media Initialization Section, if any */
1460 ret = update_init_section(v, seg);
1464 if (c->http_multiple == 1 && v->input_next_requested) {
1465 FFSWAP(AVIOContext *, v->input, v->input_next);
1466 v->input_next_requested = 0;
1469 ret = open_input(c, v, seg, &v->input);
1472 if (ff_check_interrupt(c->interrupt_callback))
1473 return AVERROR_EXIT;
1474 av_log(v->parent, AV_LOG_WARNING, "Failed to open segment %d of playlist %d\n",
1483 if (c->http_multiple == -1) {
1484 uint8_t *http_version_opt = NULL;
1485 int r = av_opt_get(v->input, "http_version", AV_OPT_SEARCH_CHILDREN, &http_version_opt);
1487 c->http_multiple = strncmp((const char *)http_version_opt, "1.1", 3) == 0;
1488 av_freep(&http_version_opt);
1492 seg = next_segment(v);
1493 if (c->http_multiple == 1 && !v->input_next_requested &&
1494 seg && seg->key_type == KEY_NONE && av_strstart(seg->url, "http", NULL)) {
1495 ret = open_input(c, v, seg, &v->input_next);
1497 if (ff_check_interrupt(c->interrupt_callback))
1498 return AVERROR_EXIT;
1499 av_log(v->parent, AV_LOG_WARNING, "Failed to open segment %d of playlist %d\n",
1503 v->input_next_requested = 1;
1507 if (v->init_sec_buf_read_offset < v->init_sec_data_len) {
1508 /* Push init section out first before first actual segment */
1509 int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size);
1510 memcpy(buf, v->init_sec_buf, copy_size);
1511 v->init_sec_buf_read_offset += copy_size;
1515 seg = current_segment(v);
1516 ret = read_from_url(v, seg, buf, buf_size, READ_NORMAL);
1518 if (just_opened && v->is_id3_timestamped != 0) {
1519 /* Intercept ID3 tags here, elementary audio streams are required
1520 * to convey timestamps using them in the beginning of each segment. */
1521 intercept_id3(v, buf, buf_size, &ret);
1526 if (c->http_persistent &&
1527 seg->key_type == KEY_NONE && av_strstart(seg->url, "http", NULL)) {
1528 v->input_read_done = 1;
1530 ff_format_io_close(v->parent, &v->input);
1534 c->cur_seq_no = v->cur_seq_no;
1539 static void add_renditions_to_variant(HLSContext *c, struct variant *var,
1540 enum AVMediaType type, const char *group_id)
1544 for (i = 0; i < c->n_renditions; i++) {
1545 struct rendition *rend = c->renditions[i];
1547 if (rend->type == type && !strcmp(rend->group_id, group_id)) {
1550 /* rendition is an external playlist
1551 * => add the playlist to the variant */
1552 dynarray_add(&var->playlists, &var->n_playlists, rend->playlist);
1554 /* rendition is part of the variant main Media Playlist
1555 * => add the rendition to the main Media Playlist */
1556 dynarray_add(&var->playlists[0]->renditions,
1557 &var->playlists[0]->n_renditions,
1563 static void add_metadata_from_renditions(AVFormatContext *s, struct playlist *pls,
1564 enum AVMediaType type)
1569 for (i = 0; i < pls->n_main_streams; i++) {
1570 AVStream *st = pls->main_streams[i];
1572 if (st->codecpar->codec_type != type)
1575 for (; rend_idx < pls->n_renditions; rend_idx++) {
1576 struct rendition *rend = pls->renditions[rend_idx];
1578 if (rend->type != type)
1581 if (rend->language[0])
1582 av_dict_set(&st->metadata, "language", rend->language, 0);
1584 av_dict_set(&st->metadata, "comment", rend->name, 0);
1586 st->disposition |= rend->disposition;
1588 if (rend_idx >=pls->n_renditions)
1593 /* if timestamp was in valid range: returns 1 and sets seq_no
1594 * if not: returns 0 and sets seq_no to closest segment */
1595 static int find_timestamp_in_playlist(HLSContext *c, struct playlist *pls,
1596 int64_t timestamp, int *seq_no)
1599 int64_t pos = c->first_timestamp == AV_NOPTS_VALUE ?
1600 0 : c->first_timestamp;
1602 if (timestamp < pos) {
1603 *seq_no = pls->start_seq_no;
1607 for (i = 0; i < pls->n_segments; i++) {
1608 int64_t diff = pos + pls->segments[i]->duration - timestamp;
1610 *seq_no = pls->start_seq_no + i;
1613 pos += pls->segments[i]->duration;
1616 *seq_no = pls->start_seq_no + pls->n_segments - 1;
1621 static int select_cur_seq_no(HLSContext *c, struct playlist *pls)
1625 if (!pls->finished && !c->first_packet &&
1626 av_gettime_relative() - pls->last_load_time >= default_reload_interval(pls))
1627 /* reload the playlist since it was suspended */
1628 parse_playlist(c, pls->url, pls, NULL);
1630 /* If playback is already in progress (we are just selecting a new
1631 * playlist) and this is a complete file, find the matching segment
1632 * by counting durations. */
1633 if (pls->finished && c->cur_timestamp != AV_NOPTS_VALUE) {
1634 find_timestamp_in_playlist(c, pls, c->cur_timestamp, &seq_no);
1638 if (!pls->finished) {
1639 if (!c->first_packet && /* we are doing a segment selection during playback */
1640 c->cur_seq_no >= pls->start_seq_no &&
1641 c->cur_seq_no < pls->start_seq_no + pls->n_segments)
1642 /* While spec 3.4.3 says that we cannot assume anything about the
1643 * content at the same sequence number on different playlists,
1644 * in practice this seems to work and doing it otherwise would
1645 * require us to download a segment to inspect its timestamps. */
1646 return c->cur_seq_no;
1648 /* If this is a live stream, start live_start_index segments from the
1650 if (c->live_start_index < 0)
1651 return pls->start_seq_no + FFMAX(pls->n_segments + c->live_start_index, 0);
1653 return pls->start_seq_no + FFMIN(c->live_start_index, pls->n_segments - 1);
1656 /* Otherwise just start on the first segment. */
1657 return pls->start_seq_no;
1660 static int save_avio_options(AVFormatContext *s)
1662 HLSContext *c = s->priv_data;
1663 static const char * const opts[] = {
1664 "headers", "http_proxy", "user_agent", "user-agent", "cookies", "referer", NULL };
1665 const char * const * opt = opts;
1670 if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN | AV_OPT_ALLOW_NULL, &buf) >= 0) {
1671 ret = av_dict_set(&c->avio_opts, *opt, buf,
1672 AV_DICT_DONT_STRDUP_VAL);
1682 static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url,
1683 int flags, AVDictionary **opts)
1685 av_log(s, AV_LOG_ERROR,
1686 "A HLS playlist item '%s' referred to an external file '%s'. "
1687 "Opening this file was forbidden for security reasons\n",
1689 return AVERROR(EPERM);
1692 static void add_stream_to_programs(AVFormatContext *s, struct playlist *pls, AVStream *stream)
1694 HLSContext *c = s->priv_data;
1698 for (i = 0; i < c->n_variants; i++) {
1699 struct variant *v = c->variants[i];
1701 for (j = 0; j < v->n_playlists; j++) {
1702 if (v->playlists[j] != pls)
1705 av_program_add_stream_index(s, i, stream->index);
1708 bandwidth = v->bandwidth;
1709 else if (bandwidth != v->bandwidth)
1710 bandwidth = -1; /* stream in multiple variants with different bandwidths */
1715 av_dict_set_int(&stream->metadata, "variant_bitrate", bandwidth, 0);
1718 static int set_stream_info_from_input_stream(AVStream *st, struct playlist *pls, AVStream *ist)
1722 err = avcodec_parameters_copy(st->codecpar, ist->codecpar);
1726 if (pls->is_id3_timestamped) /* custom timestamps via id3 */
1727 avpriv_set_pts_info(st, 33, 1, MPEG_TIME_BASE);
1729 avpriv_set_pts_info(st, ist->pts_wrap_bits, ist->time_base.num, ist->time_base.den);
1731 st->internal->need_context_update = 1;
1736 /* add new subdemuxer streams to our context, if any */
1737 static int update_streams_from_subdemuxer(AVFormatContext *s, struct playlist *pls)
1741 while (pls->n_main_streams < pls->ctx->nb_streams) {
1742 int ist_idx = pls->n_main_streams;
1743 AVStream *st = avformat_new_stream(s, NULL);
1744 AVStream *ist = pls->ctx->streams[ist_idx];
1747 return AVERROR(ENOMEM);
1749 st->id = pls->index;
1750 dynarray_add(&pls->main_streams, &pls->n_main_streams, st);
1752 add_stream_to_programs(s, pls, st);
1754 err = set_stream_info_from_input_stream(st, pls, ist);
1762 static void update_noheader_flag(AVFormatContext *s)
1764 HLSContext *c = s->priv_data;
1765 int flag_needed = 0;
1768 for (i = 0; i < c->n_playlists; i++) {
1769 struct playlist *pls = c->playlists[i];
1771 if (pls->has_noheader_flag) {
1778 s->ctx_flags |= AVFMTCTX_NOHEADER;
1780 s->ctx_flags &= ~AVFMTCTX_NOHEADER;
1783 static int hls_close(AVFormatContext *s)
1785 HLSContext *c = s->priv_data;
1787 free_playlist_list(c);
1788 free_variant_list(c);
1789 free_rendition_list(c);
1791 av_dict_free(&c->avio_opts);
1792 ff_format_io_close(c->ctx, &c->playlist_pb);
1797 static int hls_read_header(AVFormatContext *s)
1799 void *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb;
1800 HLSContext *c = s->priv_data;
1802 int highest_cur_seq_no = 0;
1805 c->interrupt_callback = &s->interrupt_callback;
1806 c->strict_std_compliance = s->strict_std_compliance;
1808 c->first_packet = 1;
1809 c->first_timestamp = AV_NOPTS_VALUE;
1810 c->cur_timestamp = AV_NOPTS_VALUE;
1813 // get the previous user agent & set back to null if string size is zero
1814 update_options(&c->user_agent, "user_agent", u);
1816 // get the previous cookies & set back to null if string size is zero
1817 update_options(&c->cookies, "cookies", u);
1819 // get the previous headers & set back to null if string size is zero
1820 update_options(&c->headers, "headers", u);
1822 // get the previous http proxt & set back to null if string size is zero
1823 update_options(&c->http_proxy, "http_proxy", u);
1826 if ((ret = parse_playlist(c, s->url, NULL, s->pb)) < 0)
1829 if ((ret = save_avio_options(s)) < 0)
1832 /* Some HLS servers don't like being sent the range header */
1833 av_dict_set(&c->avio_opts, "seekable", "0", 0);
1835 if (c->n_variants == 0) {
1836 av_log(NULL, AV_LOG_WARNING, "Empty playlist\n");
1840 /* If the playlist only contained playlists (Master Playlist),
1841 * parse each individual playlist. */
1842 if (c->n_playlists > 1 || c->playlists[0]->n_segments == 0) {
1843 for (i = 0; i < c->n_playlists; i++) {
1844 struct playlist *pls = c->playlists[i];
1845 if ((ret = parse_playlist(c, pls->url, pls, NULL)) < 0)
1850 if (c->variants[0]->playlists[0]->n_segments == 0) {
1851 av_log(NULL, AV_LOG_WARNING, "Empty playlist\n");
1856 /* If this isn't a live stream, calculate the total duration of the
1858 if (c->variants[0]->playlists[0]->finished) {
1859 int64_t duration = 0;
1860 for (i = 0; i < c->variants[0]->playlists[0]->n_segments; i++)
1861 duration += c->variants[0]->playlists[0]->segments[i]->duration;
1862 s->duration = duration;
1865 /* Associate renditions with variants */
1866 for (i = 0; i < c->n_variants; i++) {
1867 struct variant *var = c->variants[i];
1869 if (var->audio_group[0])
1870 add_renditions_to_variant(c, var, AVMEDIA_TYPE_AUDIO, var->audio_group);
1871 if (var->video_group[0])
1872 add_renditions_to_variant(c, var, AVMEDIA_TYPE_VIDEO, var->video_group);
1873 if (var->subtitles_group[0])
1874 add_renditions_to_variant(c, var, AVMEDIA_TYPE_SUBTITLE, var->subtitles_group);
1877 /* Create a program for each variant */
1878 for (i = 0; i < c->n_variants; i++) {
1879 struct variant *v = c->variants[i];
1882 program = av_new_program(s, i);
1885 av_dict_set_int(&program->metadata, "variant_bitrate", v->bandwidth, 0);
1888 /* Select the starting segments */
1889 for (i = 0; i < c->n_playlists; i++) {
1890 struct playlist *pls = c->playlists[i];
1892 if (pls->n_segments == 0)
1895 pls->cur_seq_no = select_cur_seq_no(c, pls);
1896 highest_cur_seq_no = FFMAX(highest_cur_seq_no, pls->cur_seq_no);
1899 /* Open the demuxer for each playlist */
1900 for (i = 0; i < c->n_playlists; i++) {
1901 struct playlist *pls = c->playlists[i];
1902 AVInputFormat *in_fmt = NULL;
1904 if (!(pls->ctx = avformat_alloc_context())) {
1905 ret = AVERROR(ENOMEM);
1909 if (pls->n_segments == 0)
1917 * If this is a live stream and this playlist looks like it is one segment
1918 * behind, try to sync it up so that every substream starts at the same
1919 * time position (so e.g. avformat_find_stream_info() will see packets from
1920 * all active streams within the first few seconds). This is not very generic,
1921 * though, as the sequence numbers are technically independent.
1923 if (!pls->finished && pls->cur_seq_no == highest_cur_seq_no - 1 &&
1924 highest_cur_seq_no < pls->start_seq_no + pls->n_segments) {
1925 pls->cur_seq_no = highest_cur_seq_no;
1928 pls->read_buffer = av_malloc(INITIAL_BUFFER_SIZE);
1929 if (!pls->read_buffer){
1930 ret = AVERROR(ENOMEM);
1931 avformat_free_context(pls->ctx);
1935 ffio_init_context(&pls->pb, pls->read_buffer, INITIAL_BUFFER_SIZE, 0, pls,
1936 read_data, NULL, NULL);
1937 pls->pb.seekable = 0;
1938 ret = av_probe_input_buffer(&pls->pb, &in_fmt, pls->segments[0]->url,
1941 /* Free the ctx - it isn't initialized properly at this point,
1942 * so avformat_close_input shouldn't be called. If
1943 * avformat_open_input fails below, it frees and zeros the
1944 * context, so it doesn't need any special treatment like this. */
1945 av_log(s, AV_LOG_ERROR, "Error when loading first segment '%s'\n", pls->segments[0]->url);
1946 avformat_free_context(pls->ctx);
1950 pls->ctx->pb = &pls->pb;
1951 pls->ctx->io_open = nested_io_open;
1952 pls->ctx->flags |= s->flags & ~AVFMT_FLAG_CUSTOM_IO;
1954 if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
1957 ret = avformat_open_input(&pls->ctx, pls->segments[0]->url, in_fmt, NULL);
1961 if (pls->id3_deferred_extra && pls->ctx->nb_streams == 1) {
1962 ff_id3v2_parse_apic(pls->ctx, &pls->id3_deferred_extra);
1963 avformat_queue_attached_pictures(pls->ctx);
1964 ff_id3v2_parse_priv(pls->ctx, &pls->id3_deferred_extra);
1965 ff_id3v2_free_extra_meta(&pls->id3_deferred_extra);
1966 pls->id3_deferred_extra = NULL;
1969 if (pls->is_id3_timestamped == -1)
1970 av_log(s, AV_LOG_WARNING, "No expected HTTP requests have been made\n");
1973 * For ID3 timestamped raw audio streams we need to detect the packet
1974 * durations to calculate timestamps in fill_timing_for_id3_timestamped_stream(),
1975 * but for other streams we can rely on our user calling avformat_find_stream_info()
1976 * on us if they want to.
1978 if (pls->is_id3_timestamped) {
1979 ret = avformat_find_stream_info(pls->ctx, NULL);
1984 pls->has_noheader_flag = !!(pls->ctx->ctx_flags & AVFMTCTX_NOHEADER);
1986 /* Create new AVStreams for each stream in this playlist */
1987 ret = update_streams_from_subdemuxer(s, pls);
1992 * Copy any metadata from playlist to main streams, but do not set
1995 if (pls->n_main_streams)
1996 av_dict_copy(&pls->main_streams[0]->metadata, pls->ctx->metadata, 0);
1998 add_metadata_from_renditions(s, pls, AVMEDIA_TYPE_AUDIO);
1999 add_metadata_from_renditions(s, pls, AVMEDIA_TYPE_VIDEO);
2000 add_metadata_from_renditions(s, pls, AVMEDIA_TYPE_SUBTITLE);
2003 update_noheader_flag(s);
2011 static int recheck_discard_flags(AVFormatContext *s, int first)
2013 HLSContext *c = s->priv_data;
2017 /* Check if any new streams are needed */
2018 for (i = 0; i < c->n_playlists; i++) {
2019 struct playlist *pls = c->playlists[i];
2021 cur_needed = playlist_needed(c->playlists[i]);
2023 if (cur_needed && !pls->needed) {
2026 pls->cur_seq_no = select_cur_seq_no(c, pls);
2027 pls->pb.eof_reached = 0;
2028 if (c->cur_timestamp != AV_NOPTS_VALUE) {
2030 pls->seek_timestamp = c->cur_timestamp;
2031 pls->seek_flags = AVSEEK_FLAG_ANY;
2032 pls->seek_stream_index = -1;
2034 av_log(s, AV_LOG_INFO, "Now receiving playlist %d, segment %d\n", i, pls->cur_seq_no);
2035 } else if (first && !cur_needed && pls->needed) {
2037 ff_format_io_close(pls->parent, &pls->input);
2038 pls->input_read_done = 0;
2039 if (pls->input_next)
2040 ff_format_io_close(pls->parent, &pls->input_next);
2041 pls->input_next_requested = 0;
2044 av_log(s, AV_LOG_INFO, "No longer receiving playlist %d\n", i);
2050 static void fill_timing_for_id3_timestamped_stream(struct playlist *pls)
2052 if (pls->id3_offset >= 0) {
2053 pls->pkt.dts = pls->id3_mpegts_timestamp +
2054 av_rescale_q(pls->id3_offset,
2055 pls->ctx->streams[pls->pkt.stream_index]->time_base,
2057 if (pls->pkt.duration)
2058 pls->id3_offset += pls->pkt.duration;
2060 pls->id3_offset = -1;
2062 /* there have been packets with unknown duration
2063 * since the last id3 tag, should not normally happen */
2064 pls->pkt.dts = AV_NOPTS_VALUE;
2067 if (pls->pkt.duration)
2068 pls->pkt.duration = av_rescale_q(pls->pkt.duration,
2069 pls->ctx->streams[pls->pkt.stream_index]->time_base,
2072 pls->pkt.pts = AV_NOPTS_VALUE;
2075 static AVRational get_timebase(struct playlist *pls)
2077 if (pls->is_id3_timestamped)
2078 return MPEG_TIME_BASE_Q;
2080 return pls->ctx->streams[pls->pkt.stream_index]->time_base;
2083 static int compare_ts_with_wrapdetect(int64_t ts_a, struct playlist *pls_a,
2084 int64_t ts_b, struct playlist *pls_b)
2086 int64_t scaled_ts_a = av_rescale_q(ts_a, get_timebase(pls_a), MPEG_TIME_BASE_Q);
2087 int64_t scaled_ts_b = av_rescale_q(ts_b, get_timebase(pls_b), MPEG_TIME_BASE_Q);
2089 return av_compare_mod(scaled_ts_a, scaled_ts_b, 1LL << 33);
2092 static int hls_read_packet(AVFormatContext *s, AVPacket *pkt)
2094 HLSContext *c = s->priv_data;
2095 int ret, i, minplaylist = -1;
2097 recheck_discard_flags(s, c->first_packet);
2098 c->first_packet = 0;
2100 for (i = 0; i < c->n_playlists; i++) {
2101 struct playlist *pls = c->playlists[i];
2102 /* Make sure we've got one buffered packet from each open playlist
2104 if (pls->needed && !pls->pkt.data) {
2108 ret = av_read_frame(pls->ctx, &pls->pkt);
2110 if (!avio_feof(&pls->pb) && ret != AVERROR_EOF)
2112 reset_packet(&pls->pkt);
2115 /* stream_index check prevents matching picture attachments etc. */
2116 if (pls->is_id3_timestamped && pls->pkt.stream_index == 0) {
2117 /* audio elementary streams are id3 timestamped */
2118 fill_timing_for_id3_timestamped_stream(pls);
2121 if (c->first_timestamp == AV_NOPTS_VALUE &&
2122 pls->pkt.dts != AV_NOPTS_VALUE)
2123 c->first_timestamp = av_rescale_q(pls->pkt.dts,
2124 get_timebase(pls), AV_TIME_BASE_Q);
2127 if (pls->seek_timestamp == AV_NOPTS_VALUE)
2130 if (pls->seek_stream_index < 0 ||
2131 pls->seek_stream_index == pls->pkt.stream_index) {
2133 if (pls->pkt.dts == AV_NOPTS_VALUE) {
2134 pls->seek_timestamp = AV_NOPTS_VALUE;
2138 tb = get_timebase(pls);
2139 ts_diff = av_rescale_rnd(pls->pkt.dts, AV_TIME_BASE,
2140 tb.den, AV_ROUND_DOWN) -
2141 pls->seek_timestamp;
2142 if (ts_diff >= 0 && (pls->seek_flags & AVSEEK_FLAG_ANY ||
2143 pls->pkt.flags & AV_PKT_FLAG_KEY)) {
2144 pls->seek_timestamp = AV_NOPTS_VALUE;
2148 av_packet_unref(&pls->pkt);
2149 reset_packet(&pls->pkt);
2152 /* Check if this stream has the packet with the lowest dts */
2153 if (pls->pkt.data) {
2154 struct playlist *minpls = minplaylist < 0 ?
2155 NULL : c->playlists[minplaylist];
2156 if (minplaylist < 0) {
2159 int64_t dts = pls->pkt.dts;
2160 int64_t mindts = minpls->pkt.dts;
2162 if (dts == AV_NOPTS_VALUE ||
2163 (mindts != AV_NOPTS_VALUE && compare_ts_with_wrapdetect(dts, pls, mindts, minpls) < 0))
2169 /* If we got a packet, return it */
2170 if (minplaylist >= 0) {
2171 struct playlist *pls = c->playlists[minplaylist];
2175 ret = update_streams_from_subdemuxer(s, pls);
2177 av_packet_unref(&pls->pkt);
2178 reset_packet(&pls->pkt);
2182 // If sub-demuxer reports updated metadata, copy it to the first stream
2183 // and set its AVSTREAM_EVENT_FLAG_METADATA_UPDATED flag.
2184 if (pls->ctx->event_flags & AVFMT_EVENT_FLAG_METADATA_UPDATED) {
2185 if (pls->n_main_streams) {
2186 st = pls->main_streams[0];
2187 av_dict_copy(&st->metadata, pls->ctx->metadata, 0);
2188 st->event_flags |= AVSTREAM_EVENT_FLAG_METADATA_UPDATED;
2190 pls->ctx->event_flags &= ~AVFMT_EVENT_FLAG_METADATA_UPDATED;
2193 /* check if noheader flag has been cleared by the subdemuxer */
2194 if (pls->has_noheader_flag && !(pls->ctx->ctx_flags & AVFMTCTX_NOHEADER)) {
2195 pls->has_noheader_flag = 0;
2196 update_noheader_flag(s);
2199 if (pls->pkt.stream_index >= pls->n_main_streams) {
2200 av_log(s, AV_LOG_ERROR, "stream index inconsistency: index %d, %d main streams, %d subdemuxer streams\n",
2201 pls->pkt.stream_index, pls->n_main_streams, pls->ctx->nb_streams);
2202 av_packet_unref(&pls->pkt);
2203 reset_packet(&pls->pkt);
2207 ist = pls->ctx->streams[pls->pkt.stream_index];
2208 st = pls->main_streams[pls->pkt.stream_index];
2211 pkt->stream_index = st->index;
2212 reset_packet(&c->playlists[minplaylist]->pkt);
2214 if (pkt->dts != AV_NOPTS_VALUE)
2215 c->cur_timestamp = av_rescale_q(pkt->dts,
2219 /* There may be more situations where this would be useful, but this at least
2220 * handles newly probed codecs properly (i.e. request_probe by mpegts). */
2221 if (ist->codecpar->codec_id != st->codecpar->codec_id) {
2222 ret = set_stream_info_from_input_stream(st, pls, ist);
2224 av_packet_unref(pkt);
2234 static int hls_read_seek(AVFormatContext *s, int stream_index,
2235 int64_t timestamp, int flags)
2237 HLSContext *c = s->priv_data;
2238 struct playlist *seek_pls = NULL;
2241 int stream_subdemuxer_index;
2242 int64_t first_timestamp, seek_timestamp, duration;
2244 if ((flags & AVSEEK_FLAG_BYTE) || (c->ctx->ctx_flags & AVFMTCTX_UNSEEKABLE))
2245 return AVERROR(ENOSYS);
2247 first_timestamp = c->first_timestamp == AV_NOPTS_VALUE ?
2248 0 : c->first_timestamp;
2250 seek_timestamp = av_rescale_rnd(timestamp, AV_TIME_BASE,
2251 s->streams[stream_index]->time_base.den,
2252 flags & AVSEEK_FLAG_BACKWARD ?
2253 AV_ROUND_DOWN : AV_ROUND_UP);
2255 duration = s->duration == AV_NOPTS_VALUE ?
2258 if (0 < duration && duration < seek_timestamp - first_timestamp)
2259 return AVERROR(EIO);
2261 /* find the playlist with the specified stream */
2262 for (i = 0; i < c->n_playlists; i++) {
2263 struct playlist *pls = c->playlists[i];
2264 for (j = 0; j < pls->n_main_streams; j++) {
2265 if (pls->main_streams[j] == s->streams[stream_index]) {
2267 stream_subdemuxer_index = j;
2272 /* check if the timestamp is valid for the playlist with the
2273 * specified stream index */
2274 if (!seek_pls || !find_timestamp_in_playlist(c, seek_pls, seek_timestamp, &seq_no))
2275 return AVERROR(EIO);
2277 /* set segment now so we do not need to search again below */
2278 seek_pls->cur_seq_no = seq_no;
2279 seek_pls->seek_stream_index = stream_subdemuxer_index;
2281 for (i = 0; i < c->n_playlists; i++) {
2283 struct playlist *pls = c->playlists[i];
2285 ff_format_io_close(pls->parent, &pls->input);
2286 pls->input_read_done = 0;
2287 if (pls->input_next)
2288 ff_format_io_close(pls->parent, &pls->input_next);
2289 pls->input_next_requested = 0;
2290 av_packet_unref(&pls->pkt);
2291 reset_packet(&pls->pkt);
2292 pls->pb.eof_reached = 0;
2293 /* Clear any buffered data */
2294 pls->pb.buf_end = pls->pb.buf_ptr = pls->pb.buffer;
2295 /* Reset the pos, to let the mpegts demuxer know we've seeked. */
2297 /* Flush the packet queue of the subdemuxer. */
2298 ff_read_frame_flush(pls->ctx);
2300 pls->seek_timestamp = seek_timestamp;
2301 pls->seek_flags = flags;
2303 if (pls != seek_pls) {
2304 /* set closest segment seq_no for playlists not handled above */
2305 find_timestamp_in_playlist(c, pls, seek_timestamp, &pls->cur_seq_no);
2306 /* seek the playlist to the given position without taking
2307 * keyframes into account since this playlist does not have the
2308 * specified stream where we should look for the keyframes */
2309 pls->seek_stream_index = -1;
2310 pls->seek_flags |= AVSEEK_FLAG_ANY;
2314 c->cur_timestamp = seek_timestamp;
2319 static int hls_probe(AVProbeData *p)
2321 /* Require #EXTM3U at the start, and either one of the ones below
2322 * somewhere for a proper match. */
2323 if (strncmp(p->buf, "#EXTM3U", 7))
2326 if (strstr(p->buf, "#EXT-X-STREAM-INF:") ||
2327 strstr(p->buf, "#EXT-X-TARGETDURATION:") ||
2328 strstr(p->buf, "#EXT-X-MEDIA-SEQUENCE:"))
2329 return AVPROBE_SCORE_MAX;
2333 #define OFFSET(x) offsetof(HLSContext, x)
2334 #define FLAGS AV_OPT_FLAG_DECODING_PARAM
2335 static const AVOption hls_options[] = {
2336 {"live_start_index", "segment index to start live streams at (negative values are from the end)",
2337 OFFSET(live_start_index), AV_OPT_TYPE_INT, {.i64 = -3}, INT_MIN, INT_MAX, FLAGS},
2338 {"allowed_extensions", "List of file extensions that hls is allowed to access",
2339 OFFSET(allowed_extensions), AV_OPT_TYPE_STRING,
2340 {.str = "3gp,aac,avi,flac,mkv,m3u8,m4a,m4s,m4v,mpg,mov,mp2,mp3,mp4,mpeg,mpegts,ogg,ogv,oga,ts,vob,wav"},
2341 INT_MIN, INT_MAX, FLAGS},
2342 {"max_reload", "Maximum number of times a insufficient list is attempted to be reloaded",
2343 OFFSET(max_reload), AV_OPT_TYPE_INT, {.i64 = 1000}, 0, INT_MAX, FLAGS},
2344 {"http_persistent", "Use persistent HTTP connections",
2345 OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS },
2346 {"http_multiple", "Use multiple HTTP connections for fetching segments",
2347 OFFSET(http_multiple), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, FLAGS},
2351 static const AVClass hls_class = {
2352 .class_name = "hls,applehttp",
2353 .item_name = av_default_item_name,
2354 .option = hls_options,
2355 .version = LIBAVUTIL_VERSION_INT,
2358 AVInputFormat ff_hls_demuxer = {
2359 .name = "hls,applehttp",
2360 .long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
2361 .priv_class = &hls_class,
2362 .priv_data_size = sizeof(HLSContext),
2363 .flags = AVFMT_NOGENSEARCH,
2364 .read_probe = hls_probe,
2365 .read_header = hls_read_header,
2366 .read_packet = hls_read_packet,
2367 .read_close = hls_close,
2368 .read_seek = hls_read_seek,