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;
122 int m3u8_hold_counters;
123 int64_t cur_seg_offset;
124 int64_t last_load_time;
126 /* Currently active Media Initialization Section */
127 struct segment *cur_init_section;
128 uint8_t *init_sec_buf;
129 unsigned int init_sec_buf_size;
130 unsigned int init_sec_data_len;
131 unsigned int init_sec_buf_read_offset;
133 char key_url[MAX_URL_SIZE];
136 /* ID3 timestamp handling (elementary audio streams have ID3 timestamps
137 * (and possibly other ID3 tags) in the beginning of each segment) */
138 int is_id3_timestamped; /* -1: not yet known */
139 int64_t id3_mpegts_timestamp; /* in mpegts tb */
140 int64_t id3_offset; /* in stream original tb */
141 uint8_t* id3_buf; /* temp buffer for id3 parsing */
142 unsigned int id3_buf_size;
143 AVDictionary *id3_initial; /* data from first id3 tag */
144 int id3_found; /* ID3 tag found at some point */
145 int id3_changed; /* ID3 tag data has changed at some point */
146 ID3v2ExtraMeta *id3_deferred_extra; /* stored here until subdemuxer is opened */
148 int64_t seek_timestamp;
150 int seek_stream_index; /* into subdemuxer stream array */
152 /* Renditions associated with this playlist, if any.
153 * Alternative rendition playlists have a single rendition associated
154 * with them, and variant main Media Playlists may have
155 * multiple (playlist-less) renditions associated with them. */
157 struct rendition **renditions;
159 /* Media Initialization Sections (EXT-X-MAP) associated with this
160 * playlist, if any. */
162 struct segment **init_sections;
166 * Renditions are e.g. alternative subtitle or audio streams.
167 * The rendition may either be an external playlist or it may be
168 * contained in the main Media Playlist of the variant (in which case
172 enum AVMediaType type;
173 struct playlist *playlist;
174 char group_id[MAX_FIELD_LEN];
175 char language[MAX_FIELD_LEN];
176 char name[MAX_FIELD_LEN];
183 /* every variant contains at least the main Media Playlist in index 0 */
185 struct playlist **playlists;
187 char audio_group[MAX_FIELD_LEN];
188 char video_group[MAX_FIELD_LEN];
189 char subtitles_group[MAX_FIELD_LEN];
192 typedef struct HLSContext {
194 AVFormatContext *ctx;
196 struct variant **variants;
198 struct playlist **playlists;
200 struct rendition **renditions;
203 int m3u8_hold_counters;
204 int live_start_index;
206 int64_t first_timestamp;
207 int64_t cur_timestamp;
208 AVIOInterruptCB *interrupt_callback;
209 AVDictionary *avio_opts;
210 char *allowed_extensions;
215 AVIOContext *playlist_pb;
218 static void free_segment_dynarray(struct segment **segments, int n_segments)
221 for (i = 0; i < n_segments; i++) {
222 av_freep(&segments[i]->key);
223 av_freep(&segments[i]->url);
224 av_freep(&segments[i]);
228 static void free_segment_list(struct playlist *pls)
230 free_segment_dynarray(pls->segments, pls->n_segments);
231 av_freep(&pls->segments);
235 static void free_init_section_list(struct playlist *pls)
238 for (i = 0; i < pls->n_init_sections; i++) {
239 av_freep(&pls->init_sections[i]->url);
240 av_freep(&pls->init_sections[i]);
242 av_freep(&pls->init_sections);
243 pls->n_init_sections = 0;
246 static void free_playlist_list(HLSContext *c)
249 for (i = 0; i < c->n_playlists; i++) {
250 struct playlist *pls = c->playlists[i];
251 free_segment_list(pls);
252 free_init_section_list(pls);
253 av_freep(&pls->main_streams);
254 av_freep(&pls->renditions);
255 av_freep(&pls->id3_buf);
256 av_dict_free(&pls->id3_initial);
257 ff_id3v2_free_extra_meta(&pls->id3_deferred_extra);
258 av_freep(&pls->init_sec_buf);
259 av_packet_unref(&pls->pkt);
260 av_freep(&pls->pb.buffer);
261 ff_format_io_close(c->ctx, &pls->input);
262 pls->input_read_done = 0;
263 ff_format_io_close(c->ctx, &pls->input_next);
264 pls->input_next_requested = 0;
267 avformat_close_input(&pls->ctx);
271 av_freep(&c->playlists);
275 static void free_variant_list(HLSContext *c)
278 for (i = 0; i < c->n_variants; i++) {
279 struct variant *var = c->variants[i];
280 av_freep(&var->playlists);
283 av_freep(&c->variants);
287 static void free_rendition_list(HLSContext *c)
290 for (i = 0; i < c->n_renditions; i++)
291 av_freep(&c->renditions[i]);
292 av_freep(&c->renditions);
297 * Used to reset a statically allocated AVPacket to a clean state,
298 * containing no data.
300 static void reset_packet(AVPacket *pkt)
306 static struct playlist *new_playlist(HLSContext *c, const char *url,
309 struct playlist *pls = av_mallocz(sizeof(struct playlist));
312 reset_packet(&pls->pkt);
313 ff_make_absolute_url(pls->url, sizeof(pls->url), base, url);
314 pls->seek_timestamp = AV_NOPTS_VALUE;
316 pls->is_id3_timestamped = -1;
317 pls->id3_mpegts_timestamp = AV_NOPTS_VALUE;
319 dynarray_add(&c->playlists, &c->n_playlists, pls);
323 struct variant_info {
325 /* variant group ids: */
326 char audio[MAX_FIELD_LEN];
327 char video[MAX_FIELD_LEN];
328 char subtitles[MAX_FIELD_LEN];
331 static struct variant *new_variant(HLSContext *c, struct variant_info *info,
332 const char *url, const char *base)
335 struct playlist *pls;
337 pls = new_playlist(c, url, base);
341 var = av_mallocz(sizeof(struct variant));
346 var->bandwidth = atoi(info->bandwidth);
347 strcpy(var->audio_group, info->audio);
348 strcpy(var->video_group, info->video);
349 strcpy(var->subtitles_group, info->subtitles);
352 dynarray_add(&c->variants, &c->n_variants, var);
353 dynarray_add(&var->playlists, &var->n_playlists, pls);
357 static void handle_variant_args(struct variant_info *info, const char *key,
358 int key_len, char **dest, int *dest_len)
360 if (!strncmp(key, "BANDWIDTH=", key_len)) {
361 *dest = info->bandwidth;
362 *dest_len = sizeof(info->bandwidth);
363 } else if (!strncmp(key, "AUDIO=", key_len)) {
365 *dest_len = sizeof(info->audio);
366 } else if (!strncmp(key, "VIDEO=", key_len)) {
368 *dest_len = sizeof(info->video);
369 } else if (!strncmp(key, "SUBTITLES=", key_len)) {
370 *dest = info->subtitles;
371 *dest_len = sizeof(info->subtitles);
376 char uri[MAX_URL_SIZE];
381 static void handle_key_args(struct key_info *info, const char *key,
382 int key_len, char **dest, int *dest_len)
384 if (!strncmp(key, "METHOD=", key_len)) {
385 *dest = info->method;
386 *dest_len = sizeof(info->method);
387 } else if (!strncmp(key, "URI=", key_len)) {
389 *dest_len = sizeof(info->uri);
390 } else if (!strncmp(key, "IV=", key_len)) {
392 *dest_len = sizeof(info->iv);
396 struct init_section_info {
397 char uri[MAX_URL_SIZE];
401 static struct segment *new_init_section(struct playlist *pls,
402 struct init_section_info *info,
403 const char *url_base)
406 char tmp_str[MAX_URL_SIZE], *ptr = tmp_str;
411 sec = av_mallocz(sizeof(*sec));
415 if (!av_strncasecmp(info->uri, "data:", 5)) {
418 ff_make_absolute_url(tmp_str, sizeof(tmp_str), url_base, info->uri);
420 sec->url = av_strdup(ptr);
426 if (info->byterange[0]) {
427 sec->size = strtoll(info->byterange, NULL, 10);
428 ptr = strchr(info->byterange, '@');
430 sec->url_offset = strtoll(ptr+1, NULL, 10);
432 /* the entire file is the init section */
436 dynarray_add(&pls->init_sections, &pls->n_init_sections, sec);
441 static void handle_init_section_args(struct init_section_info *info, const char *key,
442 int key_len, char **dest, int *dest_len)
444 if (!strncmp(key, "URI=", key_len)) {
446 *dest_len = sizeof(info->uri);
447 } else if (!strncmp(key, "BYTERANGE=", key_len)) {
448 *dest = info->byterange;
449 *dest_len = sizeof(info->byterange);
453 struct rendition_info {
455 char uri[MAX_URL_SIZE];
456 char group_id[MAX_FIELD_LEN];
457 char language[MAX_FIELD_LEN];
458 char assoc_language[MAX_FIELD_LEN];
459 char name[MAX_FIELD_LEN];
462 char characteristics[MAX_CHARACTERISTICS_LEN];
465 static struct rendition *new_rendition(HLSContext *c, struct rendition_info *info,
466 const char *url_base)
468 struct rendition *rend;
469 enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
470 char *characteristic;
474 if (!strcmp(info->type, "AUDIO"))
475 type = AVMEDIA_TYPE_AUDIO;
476 else if (!strcmp(info->type, "VIDEO"))
477 type = AVMEDIA_TYPE_VIDEO;
478 else if (!strcmp(info->type, "SUBTITLES"))
479 type = AVMEDIA_TYPE_SUBTITLE;
480 else if (!strcmp(info->type, "CLOSED-CAPTIONS"))
481 /* CLOSED-CAPTIONS is ignored since we do not support CEA-608 CC in
482 * AVC SEI RBSP anyway */
485 if (type == AVMEDIA_TYPE_UNKNOWN) {
486 av_log(c->ctx, AV_LOG_WARNING, "Can't support the type: %s\n", info->type);
490 /* URI is mandatory for subtitles as per spec */
491 if (type == AVMEDIA_TYPE_SUBTITLE && !info->uri[0]) {
492 av_log(c->ctx, AV_LOG_ERROR, "The URI tag is REQUIRED for subtitle.\n");
496 /* TODO: handle subtitles (each segment has to parsed separately) */
497 if (c->ctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL)
498 if (type == AVMEDIA_TYPE_SUBTITLE) {
499 av_log(c->ctx, AV_LOG_WARNING, "Can't support the subtitle(uri: %s)\n", info->uri);
503 rend = av_mallocz(sizeof(struct rendition));
507 dynarray_add(&c->renditions, &c->n_renditions, rend);
510 strcpy(rend->group_id, info->group_id);
511 strcpy(rend->language, info->language);
512 strcpy(rend->name, info->name);
514 /* add the playlist if this is an external rendition */
516 rend->playlist = new_playlist(c, info->uri, url_base);
518 dynarray_add(&rend->playlist->renditions,
519 &rend->playlist->n_renditions, rend);
522 if (info->assoc_language[0]) {
523 int langlen = strlen(rend->language);
524 if (langlen < sizeof(rend->language) - 3) {
525 rend->language[langlen] = ',';
526 strncpy(rend->language + langlen + 1, info->assoc_language,
527 sizeof(rend->language) - langlen - 2);
531 if (!strcmp(info->defaultr, "YES"))
532 rend->disposition |= AV_DISPOSITION_DEFAULT;
533 if (!strcmp(info->forced, "YES"))
534 rend->disposition |= AV_DISPOSITION_FORCED;
536 chr_ptr = info->characteristics;
537 while ((characteristic = av_strtok(chr_ptr, ",", &saveptr))) {
538 if (!strcmp(characteristic, "public.accessibility.describes-music-and-sound"))
539 rend->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
540 else if (!strcmp(characteristic, "public.accessibility.describes-video"))
541 rend->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
549 static void handle_rendition_args(struct rendition_info *info, const char *key,
550 int key_len, char **dest, int *dest_len)
552 if (!strncmp(key, "TYPE=", key_len)) {
554 *dest_len = sizeof(info->type);
555 } else if (!strncmp(key, "URI=", key_len)) {
557 *dest_len = sizeof(info->uri);
558 } else if (!strncmp(key, "GROUP-ID=", key_len)) {
559 *dest = info->group_id;
560 *dest_len = sizeof(info->group_id);
561 } else if (!strncmp(key, "LANGUAGE=", key_len)) {
562 *dest = info->language;
563 *dest_len = sizeof(info->language);
564 } else if (!strncmp(key, "ASSOC-LANGUAGE=", key_len)) {
565 *dest = info->assoc_language;
566 *dest_len = sizeof(info->assoc_language);
567 } else if (!strncmp(key, "NAME=", key_len)) {
569 *dest_len = sizeof(info->name);
570 } else if (!strncmp(key, "DEFAULT=", key_len)) {
571 *dest = info->defaultr;
572 *dest_len = sizeof(info->defaultr);
573 } else if (!strncmp(key, "FORCED=", key_len)) {
574 *dest = info->forced;
575 *dest_len = sizeof(info->forced);
576 } else if (!strncmp(key, "CHARACTERISTICS=", key_len)) {
577 *dest = info->characteristics;
578 *dest_len = sizeof(info->characteristics);
582 * - AUTOSELECT: client may autoselect based on e.g. system language
583 * - INSTREAM-ID: EIA-608 closed caption number ("CC1".."CC4")
587 /* used by parse_playlist to allocate a new variant+playlist when the
588 * playlist is detected to be a Media Playlist (not Master Playlist)
589 * and we have no parent Master Playlist (parsing of which would have
590 * allocated the variant and playlist already)
591 * *pls == NULL => Master Playlist or parentless Media Playlist
592 * *pls != NULL => parented Media Playlist, playlist+variant allocated */
593 static int ensure_playlist(HLSContext *c, struct playlist **pls, const char *url)
597 if (!new_variant(c, NULL, url, NULL))
598 return AVERROR(ENOMEM);
599 *pls = c->playlists[c->n_playlists - 1];
603 static int open_url_keepalive(AVFormatContext *s, AVIOContext **pb,
604 const char *url, AVDictionary **options)
606 #if !CONFIG_HTTP_PROTOCOL
607 return AVERROR_PROTOCOL_NOT_FOUND;
610 URLContext *uc = ffio_geturlcontext(*pb);
612 (*pb)->eof_reached = 0;
613 ret = ff_http_do_new_request2(uc, url, options);
615 ff_format_io_close(s, pb);
621 static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url,
622 AVDictionary *opts, AVDictionary *opts2, int *is_http_out)
624 HLSContext *c = s->priv_data;
625 AVDictionary *tmp = NULL;
626 const char *proto_name = NULL;
630 if (av_strstart(url, "crypto", NULL)) {
631 if (url[6] == '+' || url[6] == ':')
632 proto_name = avio_find_protocol_name(url + 7);
633 } else if (av_strstart(url, "data", NULL)) {
634 if (url[4] == '+' || url[4] == ':')
635 proto_name = avio_find_protocol_name(url + 5);
639 proto_name = avio_find_protocol_name(url);
642 return AVERROR_INVALIDDATA;
644 // only http(s) & file are allowed
645 if (av_strstart(proto_name, "file", NULL)) {
646 if (strcmp(c->allowed_extensions, "ALL") && !av_match_ext(url, c->allowed_extensions)) {
647 av_log(s, AV_LOG_ERROR,
648 "Filename extension of \'%s\' is not a common multimedia extension, blocked for security reasons.\n"
649 "If you wish to override this adjust allowed_extensions, you can set it to \'ALL\' to allow all\n",
651 return AVERROR_INVALIDDATA;
653 } else if (av_strstart(proto_name, "http", NULL)) {
655 } else if (av_strstart(proto_name, "data", NULL)) {
658 return AVERROR_INVALIDDATA;
660 if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':')
662 else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':')
664 else if (av_strstart(url, "data", NULL) && !strncmp(proto_name, url + 5, strlen(proto_name)) && url[5 + strlen(proto_name)] == ':')
666 else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))
667 return AVERROR_INVALIDDATA;
669 av_dict_copy(&tmp, opts, 0);
670 av_dict_copy(&tmp, opts2, 0);
672 if (is_http && c->http_persistent && *pb) {
673 ret = open_url_keepalive(c->ctx, pb, url, &tmp);
674 if (ret == AVERROR_EXIT) {
677 } else if (ret < 0) {
678 if (ret != AVERROR_EOF)
679 av_log(s, AV_LOG_WARNING,
680 "keepalive request failed for '%s' with error: '%s' when opening url, retrying with new connection\n",
681 url, av_err2str(ret));
682 ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
685 ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
688 // update cookies on http response with setcookies.
689 char *new_cookies = NULL;
691 if (!(s->flags & AVFMT_FLAG_CUSTOM_IO))
692 av_opt_get(*pb, "cookies", AV_OPT_SEARCH_CHILDREN, (uint8_t**)&new_cookies);
695 av_dict_set(&opts, "cookies", new_cookies, AV_DICT_DONT_STRDUP_VAL);
701 *is_http_out = is_http;
706 static int parse_playlist(HLSContext *c, const char *url,
707 struct playlist *pls, AVIOContext *in)
709 int ret = 0, is_segment = 0, is_variant = 0;
710 int64_t duration = 0;
711 enum KeyType key_type = KEY_NONE;
714 char key[MAX_URL_SIZE] = "";
715 char line[MAX_URL_SIZE];
718 int64_t seg_offset = 0;
719 int64_t seg_size = -1;
720 uint8_t *new_url = NULL;
721 struct variant_info variant_info;
722 char tmp_str[MAX_URL_SIZE];
723 struct segment *cur_init_section = NULL;
724 int is_http = av_strstart(url, "http", NULL);
725 struct segment **prev_segments = NULL;
726 int prev_n_segments = 0;
727 int prev_start_seq_no = -1;
729 if (is_http && !in && c->http_persistent && c->playlist_pb) {
731 ret = open_url_keepalive(c->ctx, &c->playlist_pb, url, NULL);
732 if (ret == AVERROR_EXIT) {
734 } else if (ret < 0) {
735 if (ret != AVERROR_EOF)
736 av_log(c->ctx, AV_LOG_WARNING,
737 "keepalive request failed for '%s' with error: '%s' when parsing playlist\n",
738 url, av_err2str(ret));
744 AVDictionary *opts = NULL;
745 av_dict_copy(&opts, c->avio_opts, 0);
747 if (c->http_persistent)
748 av_dict_set(&opts, "multiple_requests", "1", 0);
750 ret = c->ctx->io_open(c->ctx, &in, url, AVIO_FLAG_READ, &opts);
755 if (is_http && c->http_persistent)
761 if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >= 0)
764 ff_get_chomp_line(in, line, sizeof(line));
765 if (strcmp(line, "#EXTM3U")) {
766 ret = AVERROR_INVALIDDATA;
771 prev_start_seq_no = pls->start_seq_no;
772 prev_segments = pls->segments;
773 prev_n_segments = pls->n_segments;
774 pls->segments = NULL;
778 pls->type = PLS_TYPE_UNSPECIFIED;
780 while (!avio_feof(in)) {
781 ff_get_chomp_line(in, line, sizeof(line));
782 if (av_strstart(line, "#EXT-X-STREAM-INF:", &ptr)) {
784 memset(&variant_info, 0, sizeof(variant_info));
785 ff_parse_key_value(ptr, (ff_parse_key_val_cb) handle_variant_args,
787 } else if (av_strstart(line, "#EXT-X-KEY:", &ptr)) {
788 struct key_info info = {{0}};
789 ff_parse_key_value(ptr, (ff_parse_key_val_cb) handle_key_args,
793 if (!strcmp(info.method, "AES-128"))
794 key_type = KEY_AES_128;
795 if (!strcmp(info.method, "SAMPLE-AES"))
796 key_type = KEY_SAMPLE_AES;
797 if (!strncmp(info.iv, "0x", 2) || !strncmp(info.iv, "0X", 2)) {
798 ff_hex_to_data(iv, info.iv + 2);
801 av_strlcpy(key, info.uri, sizeof(key));
802 } else if (av_strstart(line, "#EXT-X-MEDIA:", &ptr)) {
803 struct rendition_info info = {{0}};
804 ff_parse_key_value(ptr, (ff_parse_key_val_cb) handle_rendition_args,
806 new_rendition(c, &info, url);
807 } else if (av_strstart(line, "#EXT-X-TARGETDURATION:", &ptr)) {
808 ret = ensure_playlist(c, &pls, url);
811 pls->target_duration = strtoll(ptr, NULL, 10) * AV_TIME_BASE;
812 } else if (av_strstart(line, "#EXT-X-MEDIA-SEQUENCE:", &ptr)) {
813 ret = ensure_playlist(c, &pls, url);
816 pls->start_seq_no = atoi(ptr);
817 } else if (av_strstart(line, "#EXT-X-PLAYLIST-TYPE:", &ptr)) {
818 ret = ensure_playlist(c, &pls, url);
821 if (!strcmp(ptr, "EVENT"))
822 pls->type = PLS_TYPE_EVENT;
823 else if (!strcmp(ptr, "VOD"))
824 pls->type = PLS_TYPE_VOD;
825 } else if (av_strstart(line, "#EXT-X-MAP:", &ptr)) {
826 struct init_section_info info = {{0}};
827 ret = ensure_playlist(c, &pls, url);
830 ff_parse_key_value(ptr, (ff_parse_key_val_cb) handle_init_section_args,
832 cur_init_section = new_init_section(pls, &info, url);
833 cur_init_section->key_type = key_type;
835 memcpy(cur_init_section->iv, iv, sizeof(iv));
837 int seq = pls->start_seq_no + pls->n_segments;
838 memset(cur_init_section->iv, 0, sizeof(cur_init_section->iv));
839 AV_WB32(cur_init_section->iv + 12, seq);
842 if (key_type != KEY_NONE) {
843 ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, key);
844 cur_init_section->key = av_strdup(tmp_str);
845 if (!cur_init_section->key) {
846 av_free(cur_init_section);
847 ret = AVERROR(ENOMEM);
851 cur_init_section->key = NULL;
854 } else if (av_strstart(line, "#EXT-X-ENDLIST", &ptr)) {
857 } else if (av_strstart(line, "#EXTINF:", &ptr)) {
859 duration = atof(ptr) * AV_TIME_BASE;
860 } else if (av_strstart(line, "#EXT-X-BYTERANGE:", &ptr)) {
861 seg_size = strtoll(ptr, NULL, 10);
862 ptr = strchr(ptr, '@');
864 seg_offset = strtoll(ptr+1, NULL, 10);
865 } else if (av_strstart(line, "#", NULL)) {
866 av_log(c->ctx, AV_LOG_INFO, "Skip ('%s')\n", line);
868 } else if (line[0]) {
870 if (!new_variant(c, &variant_info, line, url)) {
871 ret = AVERROR(ENOMEM);
878 ret = ensure_playlist(c, &pls, url);
881 seg = av_malloc(sizeof(struct segment));
883 ret = AVERROR(ENOMEM);
886 seg->duration = duration;
887 seg->key_type = key_type;
889 memcpy(seg->iv, iv, sizeof(iv));
891 int seq = pls->start_seq_no + pls->n_segments;
892 memset(seg->iv, 0, sizeof(seg->iv));
893 AV_WB32(seg->iv + 12, seq);
896 if (key_type != KEY_NONE) {
897 ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, key);
898 seg->key = av_strdup(tmp_str);
901 ret = AVERROR(ENOMEM);
908 ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, line);
909 seg->url = av_strdup(tmp_str);
913 ret = AVERROR(ENOMEM);
917 dynarray_add(&pls->segments, &pls->n_segments, seg);
920 seg->size = seg_size;
922 seg->url_offset = seg_offset;
923 seg_offset += seg_size;
930 seg->init_section = cur_init_section;
935 if (pls->start_seq_no > prev_start_seq_no && c->first_timestamp != AV_NOPTS_VALUE) {
936 int64_t prev_timestamp = c->first_timestamp;
937 int i, diff = pls->start_seq_no - prev_start_seq_no;
938 for (i = 0; i < prev_n_segments && i < diff; i++) {
939 c->first_timestamp += prev_segments[i]->duration;
941 av_log(c->ctx, AV_LOG_DEBUG, "Media sequence change (%d -> %d)"
942 " reflected in first_timestamp: %"PRId64" -> %"PRId64"\n",
943 prev_start_seq_no, pls->start_seq_no,
944 prev_timestamp, c->first_timestamp);
945 } else if (pls->start_seq_no < prev_start_seq_no) {
946 av_log(c->ctx, AV_LOG_WARNING, "Media sequence changed unexpectedly: %d -> %d\n",
947 prev_start_seq_no, pls->start_seq_no);
949 free_segment_dynarray(prev_segments, prev_n_segments);
950 av_freep(&prev_segments);
953 pls->last_load_time = av_gettime_relative();
958 ff_format_io_close(c->ctx, &in);
959 c->ctx->ctx_flags = c->ctx->ctx_flags & ~(unsigned)AVFMTCTX_UNSEEKABLE;
960 if (!c->n_variants || !c->variants[0]->n_playlists ||
961 !(c->variants[0]->playlists[0]->finished ||
962 c->variants[0]->playlists[0]->type == PLS_TYPE_EVENT))
963 c->ctx->ctx_flags |= AVFMTCTX_UNSEEKABLE;
967 static struct segment *current_segment(struct playlist *pls)
969 return pls->segments[pls->cur_seq_no - pls->start_seq_no];
972 static struct segment *next_segment(struct playlist *pls)
974 int n = pls->cur_seq_no - pls->start_seq_no + 1;
975 if (n >= pls->n_segments)
977 return pls->segments[n];
980 static int read_from_url(struct playlist *pls, struct segment *seg,
981 uint8_t *buf, int buf_size)
985 /* limit read if the segment was only a part of a file */
987 buf_size = FFMIN(buf_size, seg->size - pls->cur_seg_offset);
989 ret = avio_read(pls->input, buf, buf_size);
991 pls->cur_seg_offset += ret;
996 /* Parse the raw ID3 data and pass contents to caller */
997 static void parse_id3(AVFormatContext *s, AVIOContext *pb,
998 AVDictionary **metadata, int64_t *dts,
999 ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta **extra_meta)
1001 static const char id3_priv_owner_ts[] = "com.apple.streaming.transportStreamTimestamp";
1002 ID3v2ExtraMeta *meta;
1004 ff_id3v2_read_dict(pb, metadata, ID3v2_DEFAULT_MAGIC, extra_meta);
1005 for (meta = *extra_meta; meta; meta = meta->next) {
1006 if (!strcmp(meta->tag, "PRIV")) {
1007 ID3v2ExtraMetaPRIV *priv = meta->data;
1008 if (priv->datasize == 8 && !strcmp(priv->owner, id3_priv_owner_ts)) {
1009 /* 33-bit MPEG timestamp */
1010 int64_t ts = AV_RB64(priv->data);
1011 av_log(s, AV_LOG_DEBUG, "HLS ID3 audio timestamp %"PRId64"\n", ts);
1012 if ((ts & ~((1ULL << 33) - 1)) == 0)
1015 av_log(s, AV_LOG_ERROR, "Invalid HLS ID3 audio timestamp %"PRId64"\n", ts);
1017 } else if (!strcmp(meta->tag, "APIC") && apic)
1022 /* Check if the ID3 metadata contents have changed */
1023 static int id3_has_changed_values(struct playlist *pls, AVDictionary *metadata,
1024 ID3v2ExtraMetaAPIC *apic)
1026 AVDictionaryEntry *entry = NULL;
1027 AVDictionaryEntry *oldentry;
1028 /* check that no keys have changed values */
1029 while ((entry = av_dict_get(metadata, "", entry, AV_DICT_IGNORE_SUFFIX))) {
1030 oldentry = av_dict_get(pls->id3_initial, entry->key, NULL, AV_DICT_MATCH_CASE);
1031 if (!oldentry || strcmp(oldentry->value, entry->value) != 0)
1035 /* check if apic appeared */
1036 if (apic && (pls->ctx->nb_streams != 2 || !pls->ctx->streams[1]->attached_pic.data))
1040 int size = pls->ctx->streams[1]->attached_pic.size;
1041 if (size != apic->buf->size - AV_INPUT_BUFFER_PADDING_SIZE)
1044 if (memcmp(apic->buf->data, pls->ctx->streams[1]->attached_pic.data, size) != 0)
1051 /* Parse ID3 data and handle the found data */
1052 static void handle_id3(AVIOContext *pb, struct playlist *pls)
1054 AVDictionary *metadata = NULL;
1055 ID3v2ExtraMetaAPIC *apic = NULL;
1056 ID3v2ExtraMeta *extra_meta = NULL;
1057 int64_t timestamp = AV_NOPTS_VALUE;
1059 parse_id3(pls->ctx, pb, &metadata, ×tamp, &apic, &extra_meta);
1061 if (timestamp != AV_NOPTS_VALUE) {
1062 pls->id3_mpegts_timestamp = timestamp;
1063 pls->id3_offset = 0;
1066 if (!pls->id3_found) {
1067 /* initial ID3 tags */
1068 av_assert0(!pls->id3_deferred_extra);
1071 /* get picture attachment and set text metadata */
1072 if (pls->ctx->nb_streams)
1073 ff_id3v2_parse_apic(pls->ctx, &extra_meta);
1075 /* demuxer not yet opened, defer picture attachment */
1076 pls->id3_deferred_extra = extra_meta;
1078 ff_id3v2_parse_priv_dict(&metadata, &extra_meta);
1079 av_dict_copy(&pls->ctx->metadata, metadata, 0);
1080 pls->id3_initial = metadata;
1083 if (!pls->id3_changed && id3_has_changed_values(pls, metadata, apic)) {
1084 avpriv_report_missing_feature(pls->parent, "Changing ID3 metadata in HLS audio elementary stream");
1085 pls->id3_changed = 1;
1087 av_dict_free(&metadata);
1090 if (!pls->id3_deferred_extra)
1091 ff_id3v2_free_extra_meta(&extra_meta);
1094 static void intercept_id3(struct playlist *pls, uint8_t *buf,
1095 int buf_size, int *len)
1097 /* intercept id3 tags, we do not want to pass them to the raw
1098 * demuxer on all segment switches */
1100 int id3_buf_pos = 0;
1102 struct segment *seg = current_segment(pls);
1104 /* gather all the id3 tags */
1106 /* see if we can retrieve enough data for ID3 header */
1107 if (*len < ID3v2_HEADER_SIZE && buf_size >= ID3v2_HEADER_SIZE) {
1108 bytes = read_from_url(pls, seg, buf + *len, ID3v2_HEADER_SIZE - *len);
1111 if (bytes == ID3v2_HEADER_SIZE - *len)
1112 /* no EOF yet, so fill the caller buffer again after
1113 * we have stripped the ID3 tags */
1118 } else if (*len <= 0) {
1125 if (*len < ID3v2_HEADER_SIZE)
1128 if (ff_id3v2_match(buf, ID3v2_DEFAULT_MAGIC)) {
1129 int64_t maxsize = seg->size >= 0 ? seg->size : 1024*1024;
1130 int taglen = ff_id3v2_tag_len(buf);
1131 int tag_got_bytes = FFMIN(taglen, *len);
1132 int remaining = taglen - tag_got_bytes;
1134 if (taglen > maxsize) {
1135 av_log(pls->parent, AV_LOG_ERROR, "Too large HLS ID3 tag (%d > %"PRId64" bytes)\n",
1141 * Copy the id3 tag to our temporary id3 buffer.
1142 * We could read a small id3 tag directly without memcpy, but
1143 * we would still need to copy the large tags, and handling
1144 * both of those cases together with the possibility for multiple
1145 * tags would make the handling a bit complex.
1147 pls->id3_buf = av_fast_realloc(pls->id3_buf, &pls->id3_buf_size, id3_buf_pos + taglen);
1150 memcpy(pls->id3_buf + id3_buf_pos, buf, tag_got_bytes);
1151 id3_buf_pos += tag_got_bytes;
1153 /* strip the intercepted bytes */
1154 *len -= tag_got_bytes;
1155 memmove(buf, buf + tag_got_bytes, *len);
1156 av_log(pls->parent, AV_LOG_DEBUG, "Stripped %d HLS ID3 bytes\n", tag_got_bytes);
1158 if (remaining > 0) {
1159 /* read the rest of the tag in */
1160 if (read_from_url(pls, seg, pls->id3_buf + id3_buf_pos, remaining) != remaining)
1162 id3_buf_pos += remaining;
1163 av_log(pls->parent, AV_LOG_DEBUG, "Stripped additional %d HLS ID3 bytes\n", remaining);
1167 /* no more ID3 tags */
1172 /* re-fill buffer for the caller unless EOF */
1173 if (*len >= 0 && (fill_buf || *len == 0)) {
1174 bytes = read_from_url(pls, seg, buf + *len, buf_size - *len);
1176 /* ignore error if we already had some data */
1184 /* Now parse all the ID3 tags */
1185 AVIOContext id3ioctx;
1186 ffio_init_context(&id3ioctx, pls->id3_buf, id3_buf_pos, 0, NULL, NULL, NULL, NULL);
1187 handle_id3(&id3ioctx, pls);
1190 if (pls->is_id3_timestamped == -1)
1191 pls->is_id3_timestamped = (pls->id3_mpegts_timestamp != AV_NOPTS_VALUE);
1194 static int open_input(HLSContext *c, struct playlist *pls, struct segment *seg, AVIOContext **in)
1196 AVDictionary *opts = NULL;
1200 if (c->http_persistent)
1201 av_dict_set(&opts, "multiple_requests", "1", 0);
1203 if (seg->size >= 0) {
1204 /* try to restrict the HTTP request to the part we want
1205 * (if this is in fact a HTTP request) */
1206 av_dict_set_int(&opts, "offset", seg->url_offset, 0);
1207 av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
1210 av_log(pls->parent, AV_LOG_VERBOSE, "HLS request for url '%s', offset %"PRId64", playlist %d\n",
1211 seg->url, seg->url_offset, pls->index);
1213 if (seg->key_type == KEY_NONE) {
1214 ret = open_url(pls->parent, in, seg->url, c->avio_opts, opts, &is_http);
1215 } else if (seg->key_type == KEY_AES_128) {
1216 char iv[33], key[33], url[MAX_URL_SIZE];
1217 if (strcmp(seg->key, pls->key_url)) {
1218 AVIOContext *pb = NULL;
1219 if (open_url(pls->parent, &pb, seg->key, c->avio_opts, opts, NULL) == 0) {
1220 ret = avio_read(pb, pls->key, sizeof(pls->key));
1221 if (ret != sizeof(pls->key)) {
1222 av_log(pls->parent, AV_LOG_ERROR, "Unable to read key file %s\n",
1225 ff_format_io_close(pls->parent, &pb);
1227 av_log(pls->parent, AV_LOG_ERROR, "Unable to open key file %s\n",
1230 av_strlcpy(pls->key_url, seg->key, sizeof(pls->key_url));
1232 ff_data_to_hex(iv, seg->iv, sizeof(seg->iv), 0);
1233 ff_data_to_hex(key, pls->key, sizeof(pls->key), 0);
1234 iv[32] = key[32] = '\0';
1235 if (strstr(seg->url, "://"))
1236 snprintf(url, sizeof(url), "crypto+%s", seg->url);
1238 snprintf(url, sizeof(url), "crypto:%s", seg->url);
1240 av_dict_set(&opts, "key", key, 0);
1241 av_dict_set(&opts, "iv", iv, 0);
1243 ret = open_url(pls->parent, in, url, c->avio_opts, opts, &is_http);
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);
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 ('%s')\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(v->parent, 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->last_seq_no) {
1445 v->last_seq_no = v->cur_seq_no;
1446 v->m3u8_hold_counters = 0;
1447 } else if (v->last_seq_no == v->cur_seq_no) {
1448 v->m3u8_hold_counters++;
1449 if (v->m3u8_hold_counters >= c->m3u8_hold_counters) {
1453 av_log(v->parent, AV_LOG_WARNING, "maybe the m3u8 list sequence have been wraped.\n");
1455 if (v->cur_seq_no >= v->start_seq_no + v->n_segments) {
1458 while (av_gettime_relative() - v->last_load_time < reload_interval) {
1459 if (ff_check_interrupt(c->interrupt_callback))
1460 return AVERROR_EXIT;
1461 av_usleep(100*1000);
1463 /* Enough time has elapsed since the last reload */
1467 v->input_read_done = 0;
1468 seg = current_segment(v);
1470 /* load/update Media Initialization Section, if any */
1471 ret = update_init_section(v, seg);
1475 if (c->http_multiple == 1 && v->input_next_requested) {
1476 FFSWAP(AVIOContext *, v->input, v->input_next);
1477 v->cur_seg_offset = 0;
1478 v->input_next_requested = 0;
1481 ret = open_input(c, v, seg, &v->input);
1484 if (ff_check_interrupt(c->interrupt_callback))
1485 return AVERROR_EXIT;
1486 av_log(v->parent, AV_LOG_WARNING, "Failed to open segment %d of playlist %d\n",
1495 if (c->http_multiple == -1) {
1496 uint8_t *http_version_opt = NULL;
1497 int r = av_opt_get(v->input, "http_version", AV_OPT_SEARCH_CHILDREN, &http_version_opt);
1499 c->http_multiple = (!strncmp((const char *)http_version_opt, "1.1", 3) || !strncmp((const char *)http_version_opt, "2.0", 3));
1500 av_freep(&http_version_opt);
1504 seg = next_segment(v);
1505 if (c->http_multiple == 1 && !v->input_next_requested &&
1506 seg && seg->key_type == KEY_NONE && av_strstart(seg->url, "http", NULL)) {
1507 ret = open_input(c, v, seg, &v->input_next);
1509 if (ff_check_interrupt(c->interrupt_callback))
1510 return AVERROR_EXIT;
1511 av_log(v->parent, AV_LOG_WARNING, "Failed to open next segment %d of playlist %d\n",
1515 v->input_next_requested = 1;
1519 if (v->init_sec_buf_read_offset < v->init_sec_data_len) {
1520 /* Push init section out first before first actual segment */
1521 int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size);
1522 memcpy(buf, v->init_sec_buf, copy_size);
1523 v->init_sec_buf_read_offset += copy_size;
1527 seg = current_segment(v);
1528 ret = read_from_url(v, seg, buf, buf_size);
1530 if (just_opened && v->is_id3_timestamped != 0) {
1531 /* Intercept ID3 tags here, elementary audio streams are required
1532 * to convey timestamps using them in the beginning of each segment. */
1533 intercept_id3(v, buf, buf_size, &ret);
1538 if (c->http_persistent &&
1539 seg->key_type == KEY_NONE && av_strstart(seg->url, "http", NULL)) {
1540 v->input_read_done = 1;
1542 ff_format_io_close(v->parent, &v->input);
1546 c->cur_seq_no = v->cur_seq_no;
1551 static void add_renditions_to_variant(HLSContext *c, struct variant *var,
1552 enum AVMediaType type, const char *group_id)
1556 for (i = 0; i < c->n_renditions; i++) {
1557 struct rendition *rend = c->renditions[i];
1559 if (rend->type == type && !strcmp(rend->group_id, group_id)) {
1562 /* rendition is an external playlist
1563 * => add the playlist to the variant */
1564 dynarray_add(&var->playlists, &var->n_playlists, rend->playlist);
1566 /* rendition is part of the variant main Media Playlist
1567 * => add the rendition to the main Media Playlist */
1568 dynarray_add(&var->playlists[0]->renditions,
1569 &var->playlists[0]->n_renditions,
1575 static void add_metadata_from_renditions(AVFormatContext *s, struct playlist *pls,
1576 enum AVMediaType type)
1581 for (i = 0; i < pls->n_main_streams; i++) {
1582 AVStream *st = pls->main_streams[i];
1584 if (st->codecpar->codec_type != type)
1587 for (; rend_idx < pls->n_renditions; rend_idx++) {
1588 struct rendition *rend = pls->renditions[rend_idx];
1590 if (rend->type != type)
1593 if (rend->language[0])
1594 av_dict_set(&st->metadata, "language", rend->language, 0);
1596 av_dict_set(&st->metadata, "comment", rend->name, 0);
1598 st->disposition |= rend->disposition;
1600 if (rend_idx >=pls->n_renditions)
1605 /* if timestamp was in valid range: returns 1 and sets seq_no
1606 * if not: returns 0 and sets seq_no to closest segment */
1607 static int find_timestamp_in_playlist(HLSContext *c, struct playlist *pls,
1608 int64_t timestamp, int *seq_no)
1611 int64_t pos = c->first_timestamp == AV_NOPTS_VALUE ?
1612 0 : c->first_timestamp;
1614 if (timestamp < pos) {
1615 *seq_no = pls->start_seq_no;
1619 for (i = 0; i < pls->n_segments; i++) {
1620 int64_t diff = pos + pls->segments[i]->duration - timestamp;
1622 *seq_no = pls->start_seq_no + i;
1625 pos += pls->segments[i]->duration;
1628 *seq_no = pls->start_seq_no + pls->n_segments - 1;
1633 static int select_cur_seq_no(HLSContext *c, struct playlist *pls)
1637 if (!pls->finished && !c->first_packet &&
1638 av_gettime_relative() - pls->last_load_time >= default_reload_interval(pls))
1639 /* reload the playlist since it was suspended */
1640 parse_playlist(c, pls->url, pls, NULL);
1642 /* If playback is already in progress (we are just selecting a new
1643 * playlist) and this is a complete file, find the matching segment
1644 * by counting durations. */
1645 if (pls->finished && c->cur_timestamp != AV_NOPTS_VALUE) {
1646 find_timestamp_in_playlist(c, pls, c->cur_timestamp, &seq_no);
1650 if (!pls->finished) {
1651 if (!c->first_packet && /* we are doing a segment selection during playback */
1652 c->cur_seq_no >= pls->start_seq_no &&
1653 c->cur_seq_no < pls->start_seq_no + pls->n_segments)
1654 /* While spec 3.4.3 says that we cannot assume anything about the
1655 * content at the same sequence number on different playlists,
1656 * in practice this seems to work and doing it otherwise would
1657 * require us to download a segment to inspect its timestamps. */
1658 return c->cur_seq_no;
1660 /* If this is a live stream, start live_start_index segments from the
1662 if (c->live_start_index < 0)
1663 return pls->start_seq_no + FFMAX(pls->n_segments + c->live_start_index, 0);
1665 return pls->start_seq_no + FFMIN(c->live_start_index, pls->n_segments - 1);
1668 /* Otherwise just start on the first segment. */
1669 return pls->start_seq_no;
1672 static int save_avio_options(AVFormatContext *s)
1674 HLSContext *c = s->priv_data;
1675 static const char * const opts[] = {
1676 "headers", "http_proxy", "user_agent", "cookies", "referer", "rw_timeout", "icy", NULL };
1677 const char * const * opt = opts;
1682 if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN | AV_OPT_ALLOW_NULL, &buf) >= 0) {
1683 ret = av_dict_set(&c->avio_opts, *opt, buf,
1684 AV_DICT_DONT_STRDUP_VAL);
1694 static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url,
1695 int flags, AVDictionary **opts)
1697 av_log(s, AV_LOG_ERROR,
1698 "A HLS playlist item '%s' referred to an external file '%s'. "
1699 "Opening this file was forbidden for security reasons\n",
1701 return AVERROR(EPERM);
1704 static void add_stream_to_programs(AVFormatContext *s, struct playlist *pls, AVStream *stream)
1706 HLSContext *c = s->priv_data;
1710 for (i = 0; i < c->n_variants; i++) {
1711 struct variant *v = c->variants[i];
1713 for (j = 0; j < v->n_playlists; j++) {
1714 if (v->playlists[j] != pls)
1717 av_program_add_stream_index(s, i, stream->index);
1720 bandwidth = v->bandwidth;
1721 else if (bandwidth != v->bandwidth)
1722 bandwidth = -1; /* stream in multiple variants with different bandwidths */
1727 av_dict_set_int(&stream->metadata, "variant_bitrate", bandwidth, 0);
1730 static int set_stream_info_from_input_stream(AVStream *st, struct playlist *pls, AVStream *ist)
1734 err = avcodec_parameters_copy(st->codecpar, ist->codecpar);
1738 if (pls->is_id3_timestamped) /* custom timestamps via id3 */
1739 avpriv_set_pts_info(st, 33, 1, MPEG_TIME_BASE);
1741 avpriv_set_pts_info(st, ist->pts_wrap_bits, ist->time_base.num, ist->time_base.den);
1743 st->internal->need_context_update = 1;
1748 /* add new subdemuxer streams to our context, if any */
1749 static int update_streams_from_subdemuxer(AVFormatContext *s, struct playlist *pls)
1753 while (pls->n_main_streams < pls->ctx->nb_streams) {
1754 int ist_idx = pls->n_main_streams;
1755 AVStream *st = avformat_new_stream(s, NULL);
1756 AVStream *ist = pls->ctx->streams[ist_idx];
1759 return AVERROR(ENOMEM);
1761 st->id = pls->index;
1762 dynarray_add(&pls->main_streams, &pls->n_main_streams, st);
1764 add_stream_to_programs(s, pls, st);
1766 err = set_stream_info_from_input_stream(st, pls, ist);
1774 static void update_noheader_flag(AVFormatContext *s)
1776 HLSContext *c = s->priv_data;
1777 int flag_needed = 0;
1780 for (i = 0; i < c->n_playlists; i++) {
1781 struct playlist *pls = c->playlists[i];
1783 if (pls->has_noheader_flag) {
1790 s->ctx_flags |= AVFMTCTX_NOHEADER;
1792 s->ctx_flags &= ~AVFMTCTX_NOHEADER;
1795 static int hls_close(AVFormatContext *s)
1797 HLSContext *c = s->priv_data;
1799 free_playlist_list(c);
1800 free_variant_list(c);
1801 free_rendition_list(c);
1803 av_dict_free(&c->avio_opts);
1804 ff_format_io_close(c->ctx, &c->playlist_pb);
1809 static int hls_read_header(AVFormatContext *s)
1811 HLSContext *c = s->priv_data;
1813 int highest_cur_seq_no = 0;
1816 c->interrupt_callback = &s->interrupt_callback;
1818 c->first_packet = 1;
1819 c->first_timestamp = AV_NOPTS_VALUE;
1820 c->cur_timestamp = AV_NOPTS_VALUE;
1822 if ((ret = save_avio_options(s)) < 0)
1825 /* XXX: Some HLS servers don't like being sent the range header,
1826 in this case, need to setting http_seekable = 0 to disable
1828 av_dict_set_int(&c->avio_opts, "seekable", c->http_seekable, 0);
1830 if ((ret = parse_playlist(c, s->url, NULL, s->pb)) < 0)
1833 if (c->n_variants == 0) {
1834 av_log(s, AV_LOG_WARNING, "Empty playlist\n");
1838 /* If the playlist only contained playlists (Master Playlist),
1839 * parse each individual playlist. */
1840 if (c->n_playlists > 1 || c->playlists[0]->n_segments == 0) {
1841 for (i = 0; i < c->n_playlists; i++) {
1842 struct playlist *pls = c->playlists[i];
1843 pls->m3u8_hold_counters = 0;
1844 if ((ret = parse_playlist(c, pls->url, pls, NULL)) < 0) {
1845 av_log(s, AV_LOG_WARNING, "parse_playlist error %s [%s]\n", av_err2str(ret), pls->url);
1847 if (c->n_playlists > 1)
1854 for (i = 0; i < c->n_variants; i++) {
1855 if (c->variants[i]->playlists[0]->n_segments == 0) {
1856 av_log(s, AV_LOG_WARNING, "Empty segment [%s]\n", c->variants[i]->playlists[0]->url);
1857 c->variants[i]->playlists[0]->broken = 1;
1861 /* If this isn't a live stream, calculate the total duration of the
1863 if (c->variants[0]->playlists[0]->finished) {
1864 int64_t duration = 0;
1865 for (i = 0; i < c->variants[0]->playlists[0]->n_segments; i++)
1866 duration += c->variants[0]->playlists[0]->segments[i]->duration;
1867 s->duration = duration;
1870 /* Associate renditions with variants */
1871 for (i = 0; i < c->n_variants; i++) {
1872 struct variant *var = c->variants[i];
1874 if (var->audio_group[0])
1875 add_renditions_to_variant(c, var, AVMEDIA_TYPE_AUDIO, var->audio_group);
1876 if (var->video_group[0])
1877 add_renditions_to_variant(c, var, AVMEDIA_TYPE_VIDEO, var->video_group);
1878 if (var->subtitles_group[0])
1879 add_renditions_to_variant(c, var, AVMEDIA_TYPE_SUBTITLE, var->subtitles_group);
1882 /* Create a program for each variant */
1883 for (i = 0; i < c->n_variants; i++) {
1884 struct variant *v = c->variants[i];
1887 program = av_new_program(s, i);
1890 av_dict_set_int(&program->metadata, "variant_bitrate", v->bandwidth, 0);
1893 /* Select the starting segments */
1894 for (i = 0; i < c->n_playlists; i++) {
1895 struct playlist *pls = c->playlists[i];
1897 if (pls->n_segments == 0)
1900 pls->cur_seq_no = select_cur_seq_no(c, pls);
1901 highest_cur_seq_no = FFMAX(highest_cur_seq_no, pls->cur_seq_no);
1904 /* Open the demuxer for each playlist */
1905 for (i = 0; i < c->n_playlists; i++) {
1906 struct playlist *pls = c->playlists[i];
1907 ff_const59 AVInputFormat *in_fmt = NULL;
1909 if (!(pls->ctx = avformat_alloc_context())) {
1910 ret = AVERROR(ENOMEM);
1914 if (pls->n_segments == 0)
1922 * If this is a live stream and this playlist looks like it is one segment
1923 * behind, try to sync it up so that every substream starts at the same
1924 * time position (so e.g. avformat_find_stream_info() will see packets from
1925 * all active streams within the first few seconds). This is not very generic,
1926 * though, as the sequence numbers are technically independent.
1928 if (!pls->finished && pls->cur_seq_no == highest_cur_seq_no - 1 &&
1929 highest_cur_seq_no < pls->start_seq_no + pls->n_segments) {
1930 pls->cur_seq_no = highest_cur_seq_no;
1933 pls->read_buffer = av_malloc(INITIAL_BUFFER_SIZE);
1934 if (!pls->read_buffer){
1935 ret = AVERROR(ENOMEM);
1936 avformat_free_context(pls->ctx);
1940 ffio_init_context(&pls->pb, pls->read_buffer, INITIAL_BUFFER_SIZE, 0, pls,
1941 read_data, NULL, NULL);
1942 pls->ctx->probesize = s->probesize > 0 ? s->probesize : 1024 * 4;
1943 pls->ctx->max_analyze_duration = s->max_analyze_duration > 0 ? s->max_analyze_duration : 4 * AV_TIME_BASE;
1944 ret = av_probe_input_buffer(&pls->pb, &in_fmt, pls->segments[0]->url,
1947 /* Free the ctx - it isn't initialized properly at this point,
1948 * so avformat_close_input shouldn't be called. If
1949 * avformat_open_input fails below, it frees and zeros the
1950 * context, so it doesn't need any special treatment like this. */
1951 av_log(s, AV_LOG_ERROR, "Error when loading first segment '%s'\n", pls->segments[0]->url);
1952 avformat_free_context(pls->ctx);
1956 pls->ctx->pb = &pls->pb;
1957 pls->ctx->io_open = nested_io_open;
1958 pls->ctx->flags |= s->flags & ~AVFMT_FLAG_CUSTOM_IO;
1960 if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
1963 ret = avformat_open_input(&pls->ctx, pls->segments[0]->url, in_fmt, NULL);
1967 if (pls->id3_deferred_extra && pls->ctx->nb_streams == 1) {
1968 ff_id3v2_parse_apic(pls->ctx, &pls->id3_deferred_extra);
1969 avformat_queue_attached_pictures(pls->ctx);
1970 ff_id3v2_parse_priv(pls->ctx, &pls->id3_deferred_extra);
1971 ff_id3v2_free_extra_meta(&pls->id3_deferred_extra);
1972 pls->id3_deferred_extra = NULL;
1975 if (pls->is_id3_timestamped == -1)
1976 av_log(s, AV_LOG_WARNING, "No expected HTTP requests have been made\n");
1979 * For ID3 timestamped raw audio streams we need to detect the packet
1980 * durations to calculate timestamps in fill_timing_for_id3_timestamped_stream(),
1981 * but for other streams we can rely on our user calling avformat_find_stream_info()
1982 * on us if they want to.
1984 if (pls->is_id3_timestamped || (pls->n_renditions > 0 && pls->renditions[0]->type == AVMEDIA_TYPE_AUDIO)) {
1985 ret = avformat_find_stream_info(pls->ctx, NULL);
1990 pls->has_noheader_flag = !!(pls->ctx->ctx_flags & AVFMTCTX_NOHEADER);
1992 /* Create new AVStreams for each stream in this playlist */
1993 ret = update_streams_from_subdemuxer(s, pls);
1998 * Copy any metadata from playlist to main streams, but do not set
2001 if (pls->n_main_streams)
2002 av_dict_copy(&pls->main_streams[0]->metadata, pls->ctx->metadata, 0);
2004 add_metadata_from_renditions(s, pls, AVMEDIA_TYPE_AUDIO);
2005 add_metadata_from_renditions(s, pls, AVMEDIA_TYPE_VIDEO);
2006 add_metadata_from_renditions(s, pls, AVMEDIA_TYPE_SUBTITLE);
2009 update_noheader_flag(s);
2017 static int recheck_discard_flags(AVFormatContext *s, int first)
2019 HLSContext *c = s->priv_data;
2023 /* Check if any new streams are needed */
2024 for (i = 0; i < c->n_playlists; i++) {
2025 struct playlist *pls = c->playlists[i];
2027 cur_needed = playlist_needed(c->playlists[i]);
2032 if (cur_needed && !pls->needed) {
2035 pls->cur_seq_no = select_cur_seq_no(c, pls);
2036 pls->pb.eof_reached = 0;
2037 if (c->cur_timestamp != AV_NOPTS_VALUE) {
2039 pls->seek_timestamp = c->cur_timestamp;
2040 pls->seek_flags = AVSEEK_FLAG_ANY;
2041 pls->seek_stream_index = -1;
2043 av_log(s, AV_LOG_INFO, "Now receiving playlist %d, segment %d\n", i, pls->cur_seq_no);
2044 } else if (first && !cur_needed && pls->needed) {
2045 ff_format_io_close(pls->parent, &pls->input);
2046 pls->input_read_done = 0;
2047 ff_format_io_close(pls->parent, &pls->input_next);
2048 pls->input_next_requested = 0;
2051 av_log(s, AV_LOG_INFO, "No longer receiving playlist %d\n", i);
2057 static void fill_timing_for_id3_timestamped_stream(struct playlist *pls)
2059 if (pls->id3_offset >= 0) {
2060 pls->pkt.dts = pls->id3_mpegts_timestamp +
2061 av_rescale_q(pls->id3_offset,
2062 pls->ctx->streams[pls->pkt.stream_index]->time_base,
2064 if (pls->pkt.duration)
2065 pls->id3_offset += pls->pkt.duration;
2067 pls->id3_offset = -1;
2069 /* there have been packets with unknown duration
2070 * since the last id3 tag, should not normally happen */
2071 pls->pkt.dts = AV_NOPTS_VALUE;
2074 if (pls->pkt.duration)
2075 pls->pkt.duration = av_rescale_q(pls->pkt.duration,
2076 pls->ctx->streams[pls->pkt.stream_index]->time_base,
2079 pls->pkt.pts = AV_NOPTS_VALUE;
2082 static AVRational get_timebase(struct playlist *pls)
2084 if (pls->is_id3_timestamped)
2085 return MPEG_TIME_BASE_Q;
2087 return pls->ctx->streams[pls->pkt.stream_index]->time_base;
2090 static int compare_ts_with_wrapdetect(int64_t ts_a, struct playlist *pls_a,
2091 int64_t ts_b, struct playlist *pls_b)
2093 int64_t scaled_ts_a = av_rescale_q(ts_a, get_timebase(pls_a), MPEG_TIME_BASE_Q);
2094 int64_t scaled_ts_b = av_rescale_q(ts_b, get_timebase(pls_b), MPEG_TIME_BASE_Q);
2096 return av_compare_mod(scaled_ts_a, scaled_ts_b, 1LL << 33);
2099 static int hls_read_packet(AVFormatContext *s, AVPacket *pkt)
2101 HLSContext *c = s->priv_data;
2102 int ret, i, minplaylist = -1;
2104 recheck_discard_flags(s, c->first_packet);
2105 c->first_packet = 0;
2107 for (i = 0; i < c->n_playlists; i++) {
2108 struct playlist *pls = c->playlists[i];
2109 /* Make sure we've got one buffered packet from each open playlist
2111 if (pls->needed && !pls->pkt.data) {
2115 ret = av_read_frame(pls->ctx, &pls->pkt);
2117 if (!avio_feof(&pls->pb) && ret != AVERROR_EOF)
2119 reset_packet(&pls->pkt);
2122 /* stream_index check prevents matching picture attachments etc. */
2123 if (pls->is_id3_timestamped && pls->pkt.stream_index == 0) {
2124 /* audio elementary streams are id3 timestamped */
2125 fill_timing_for_id3_timestamped_stream(pls);
2128 if (c->first_timestamp == AV_NOPTS_VALUE &&
2129 pls->pkt.dts != AV_NOPTS_VALUE)
2130 c->first_timestamp = av_rescale_q(pls->pkt.dts,
2131 get_timebase(pls), AV_TIME_BASE_Q);
2134 if (pls->seek_timestamp == AV_NOPTS_VALUE)
2137 if (pls->seek_stream_index < 0 ||
2138 pls->seek_stream_index == pls->pkt.stream_index) {
2140 if (pls->pkt.dts == AV_NOPTS_VALUE) {
2141 pls->seek_timestamp = AV_NOPTS_VALUE;
2145 tb = get_timebase(pls);
2146 ts_diff = av_rescale_rnd(pls->pkt.dts, AV_TIME_BASE,
2147 tb.den, AV_ROUND_DOWN) -
2148 pls->seek_timestamp;
2149 if (ts_diff >= 0 && (pls->seek_flags & AVSEEK_FLAG_ANY ||
2150 pls->pkt.flags & AV_PKT_FLAG_KEY)) {
2151 pls->seek_timestamp = AV_NOPTS_VALUE;
2155 av_packet_unref(&pls->pkt);
2158 /* Check if this stream has the packet with the lowest dts */
2159 if (pls->pkt.data) {
2160 struct playlist *minpls = minplaylist < 0 ?
2161 NULL : c->playlists[minplaylist];
2162 if (minplaylist < 0) {
2165 int64_t dts = pls->pkt.dts;
2166 int64_t mindts = minpls->pkt.dts;
2168 if (dts == AV_NOPTS_VALUE ||
2169 (mindts != AV_NOPTS_VALUE && compare_ts_with_wrapdetect(dts, pls, mindts, minpls) < 0))
2175 /* If we got a packet, return it */
2176 if (minplaylist >= 0) {
2177 struct playlist *pls = c->playlists[minplaylist];
2181 ret = update_streams_from_subdemuxer(s, pls);
2183 av_packet_unref(&pls->pkt);
2187 // If sub-demuxer reports updated metadata, copy it to the first stream
2188 // and set its AVSTREAM_EVENT_FLAG_METADATA_UPDATED flag.
2189 if (pls->ctx->event_flags & AVFMT_EVENT_FLAG_METADATA_UPDATED) {
2190 if (pls->n_main_streams) {
2191 st = pls->main_streams[0];
2192 av_dict_copy(&st->metadata, pls->ctx->metadata, 0);
2193 st->event_flags |= AVSTREAM_EVENT_FLAG_METADATA_UPDATED;
2195 pls->ctx->event_flags &= ~AVFMT_EVENT_FLAG_METADATA_UPDATED;
2198 /* check if noheader flag has been cleared by the subdemuxer */
2199 if (pls->has_noheader_flag && !(pls->ctx->ctx_flags & AVFMTCTX_NOHEADER)) {
2200 pls->has_noheader_flag = 0;
2201 update_noheader_flag(s);
2204 if (pls->pkt.stream_index >= pls->n_main_streams) {
2205 av_log(s, AV_LOG_ERROR, "stream index inconsistency: index %d, %d main streams, %d subdemuxer streams\n",
2206 pls->pkt.stream_index, pls->n_main_streams, pls->ctx->nb_streams);
2207 av_packet_unref(&pls->pkt);
2211 ist = pls->ctx->streams[pls->pkt.stream_index];
2212 st = pls->main_streams[pls->pkt.stream_index];
2214 av_packet_move_ref(pkt, &pls->pkt);
2215 pkt->stream_index = st->index;
2217 if (pkt->dts != AV_NOPTS_VALUE)
2218 c->cur_timestamp = av_rescale_q(pkt->dts,
2222 /* There may be more situations where this would be useful, but this at least
2223 * handles newly probed codecs properly (i.e. request_probe by mpegts). */
2224 if (ist->codecpar->codec_id != st->codecpar->codec_id) {
2225 ret = set_stream_info_from_input_stream(st, pls, ist);
2236 static int hls_read_seek(AVFormatContext *s, int stream_index,
2237 int64_t timestamp, int flags)
2239 HLSContext *c = s->priv_data;
2240 struct playlist *seek_pls = NULL;
2243 int stream_subdemuxer_index;
2244 int64_t first_timestamp, seek_timestamp, duration;
2246 if ((flags & AVSEEK_FLAG_BYTE) || (c->ctx->ctx_flags & AVFMTCTX_UNSEEKABLE))
2247 return AVERROR(ENOSYS);
2249 first_timestamp = c->first_timestamp == AV_NOPTS_VALUE ?
2250 0 : c->first_timestamp;
2252 seek_timestamp = av_rescale_rnd(timestamp, AV_TIME_BASE,
2253 s->streams[stream_index]->time_base.den,
2254 flags & AVSEEK_FLAG_BACKWARD ?
2255 AV_ROUND_DOWN : AV_ROUND_UP);
2257 duration = s->duration == AV_NOPTS_VALUE ?
2260 if (0 < duration && duration < seek_timestamp - first_timestamp)
2261 return AVERROR(EIO);
2263 /* find the playlist with the specified stream */
2264 for (i = 0; i < c->n_playlists; i++) {
2265 struct playlist *pls = c->playlists[i];
2266 for (j = 0; j < pls->n_main_streams; j++) {
2267 if (pls->main_streams[j] == s->streams[stream_index]) {
2269 stream_subdemuxer_index = j;
2274 /* check if the timestamp is valid for the playlist with the
2275 * specified stream index */
2276 if (!seek_pls || !find_timestamp_in_playlist(c, seek_pls, seek_timestamp, &seq_no))
2277 return AVERROR(EIO);
2279 /* set segment now so we do not need to search again below */
2280 seek_pls->cur_seq_no = seq_no;
2281 seek_pls->seek_stream_index = stream_subdemuxer_index;
2283 for (i = 0; i < c->n_playlists; i++) {
2285 struct playlist *pls = c->playlists[i];
2286 ff_format_io_close(pls->parent, &pls->input);
2287 pls->input_read_done = 0;
2288 ff_format_io_close(pls->parent, &pls->input_next);
2289 pls->input_next_requested = 0;
2290 av_packet_unref(&pls->pkt);
2291 pls->pb.eof_reached = 0;
2292 /* Clear any buffered data */
2293 pls->pb.buf_end = pls->pb.buf_ptr = pls->pb.buffer;
2294 /* Reset the pos, to let the mpegts demuxer know we've seeked. */
2296 /* Flush the packet queue of the subdemuxer. */
2297 ff_read_frame_flush(pls->ctx);
2299 pls->seek_timestamp = seek_timestamp;
2300 pls->seek_flags = flags;
2302 if (pls != seek_pls) {
2303 /* set closest segment seq_no for playlists not handled above */
2304 find_timestamp_in_playlist(c, pls, seek_timestamp, &pls->cur_seq_no);
2305 /* seek the playlist to the given position without taking
2306 * keyframes into account since this playlist does not have the
2307 * specified stream where we should look for the keyframes */
2308 pls->seek_stream_index = -1;
2309 pls->seek_flags |= AVSEEK_FLAG_ANY;
2313 c->cur_timestamp = seek_timestamp;
2318 static int hls_probe(const AVProbeData *p)
2320 /* Require #EXTM3U at the start, and either one of the ones below
2321 * somewhere for a proper match. */
2322 if (strncmp(p->buf, "#EXTM3U", 7))
2325 if (strstr(p->buf, "#EXT-X-STREAM-INF:") ||
2326 strstr(p->buf, "#EXT-X-TARGETDURATION:") ||
2327 strstr(p->buf, "#EXT-X-MEDIA-SEQUENCE:"))
2328 return AVPROBE_SCORE_MAX;
2332 #define OFFSET(x) offsetof(HLSContext, x)
2333 #define FLAGS AV_OPT_FLAG_DECODING_PARAM
2334 static const AVOption hls_options[] = {
2335 {"live_start_index", "segment index to start live streams at (negative values are from the end)",
2336 OFFSET(live_start_index), AV_OPT_TYPE_INT, {.i64 = -3}, INT_MIN, INT_MAX, FLAGS},
2337 {"allowed_extensions", "List of file extensions that hls is allowed to access",
2338 OFFSET(allowed_extensions), AV_OPT_TYPE_STRING,
2339 {.str = "3gp,aac,avi,flac,mkv,m3u8,m4a,m4s,m4v,mpg,mov,mp2,mp3,mp4,mpeg,mpegts,ogg,ogv,oga,ts,vob,wav"},
2340 INT_MIN, INT_MAX, FLAGS},
2341 {"max_reload", "Maximum number of times a insufficient list is attempted to be reloaded",
2342 OFFSET(max_reload), AV_OPT_TYPE_INT, {.i64 = 1000}, 0, INT_MAX, FLAGS},
2343 {"m3u8_hold_counters", "The maximum number of times to load m3u8 when it refreshes without new segments",
2344 OFFSET(m3u8_hold_counters), AV_OPT_TYPE_INT, {.i64 = 1000}, 0, INT_MAX, FLAGS},
2345 {"http_persistent", "Use persistent HTTP connections",
2346 OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS },
2347 {"http_multiple", "Use multiple HTTP connections for fetching segments",
2348 OFFSET(http_multiple), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, FLAGS},
2349 {"http_seekable", "Use HTTP partial requests, 0 = disable, 1 = enable, -1 = auto",
2350 OFFSET(http_seekable), AV_OPT_TYPE_BOOL, { .i64 = -1}, -1, 1, FLAGS},
2354 static const AVClass hls_class = {
2355 .class_name = "hls demuxer",
2356 .item_name = av_default_item_name,
2357 .option = hls_options,
2358 .version = LIBAVUTIL_VERSION_INT,
2361 AVInputFormat ff_hls_demuxer = {
2363 .long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
2364 .priv_class = &hls_class,
2365 .priv_data_size = sizeof(HLSContext),
2366 .flags = AVFMT_NOGENSEARCH | AVFMT_TS_DISCONT,
2367 .read_probe = hls_probe,
2368 .read_header = hls_read_header,
2369 .read_packet = hls_read_packet,
2370 .read_close = hls_close,
2371 .read_seek = hls_read_seek,