2 * Dynamic Adaptive Streaming over HTTP demux
3 * Copyright (c) 2017 samsamsam@o2.pl based on HLS demux
4 * Copyright (c) 2017 Steven Liu
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
22 #include <libxml/parser.h>
23 #include "libavutil/intreadwrite.h"
24 #include "libavutil/opt.h"
25 #include "libavutil/time.h"
26 #include "libavutil/parseutils.h"
28 #include "avio_internal.h"
31 #define INITIAL_BUFFER_SIZE 32768
32 #define MAX_BPRINT_READ_SIZE (UINT_MAX - 1)
33 #define DEFAULT_MANIFEST_SIZE 8 * 1024
42 * reference to : ISO_IEC_23009-1-DASH-2012
44 * Table: Table 17 — Semantics of SegmentTimeline element
47 /* starttime: Element or Attribute Name
48 * specifies the MPD start time, in @timescale units,
49 * the first Segment in the series starts relative to the beginning of the Period.
50 * The value of this attribute must be equal to or greater than the sum of the previous S
51 * element earliest presentation time and the sum of the contiguous Segment durations.
52 * If the value of the attribute is greater than what is expressed by the previous S element,
53 * it expresses discontinuities in the timeline.
54 * If not present then the value shall be assumed to be zero for the first S element
55 * and for the subsequent S elements, the value shall be assumed to be the sum of
56 * the previous S element's earliest presentation time and contiguous duration
57 * (i.e. previous S@starttime + @duration * (@repeat + 1)).
60 /* repeat: Element or Attribute Name
61 * specifies the repeat count of the number of following contiguous Segments with
62 * the same duration expressed by the value of @duration. This value is zero-based
63 * (e.g. a value of three means four Segments in the contiguous series).
66 /* duration: Element or Attribute Name
67 * specifies the Segment duration, in units of the value of the @timescale.
73 * Each playlist has its own demuxer. If it is currently active,
74 * it has an opened AVIOContext too, and potentially an AVPacket
75 * containing the next packet from this stream.
77 struct representation {
81 AVFormatContext *parent;
89 AVStream *assoc_stream; /* demuxer stream associated with this representation */
92 struct fragment **fragments; /* VOD list of fragment for profile */
95 struct timeline **timelines;
99 int64_t start_number; /* used in case when we have dynamic list of segment to know which segments are new one*/
101 int64_t fragment_duration;
102 int64_t fragment_timescale;
104 int64_t presentation_timeoffset;
107 int64_t cur_seg_offset;
108 int64_t cur_seg_size;
109 struct fragment *cur_seg;
111 /* Currently active Media Initialization Section */
112 struct fragment *init_section;
113 uint8_t *init_sec_buf;
114 uint32_t init_sec_buf_size;
115 uint32_t init_sec_data_len;
116 uint32_t init_sec_buf_read_offset;
117 int64_t cur_timestamp;
118 int is_restart_needed;
121 typedef struct DASHContext {
122 const AVClass *class;
126 struct representation **videos;
128 struct representation **audios;
130 struct representation **subtitles;
132 /* MediaPresentationDescription Attribute */
133 uint64_t media_presentation_duration;
134 uint64_t suggested_presentation_delay;
135 uint64_t availability_start_time;
136 uint64_t availability_end_time;
137 uint64_t publish_time;
138 uint64_t minimum_update_period;
139 uint64_t time_shift_buffer_depth;
140 uint64_t min_buffer_time;
142 /* Period Attribute */
143 uint64_t period_duration;
144 uint64_t period_start;
146 /* AdaptationSet Attribute */
147 char *adaptionset_lang;
150 AVIOInterruptCB *interrupt_callback;
151 char *allowed_extensions;
152 AVDictionary *avio_opts;
155 /* Flags for init section*/
156 int is_init_section_common_video;
157 int is_init_section_common_audio;
158 int is_init_section_common_subtitle;
162 static int ishttp(char *url)
164 const char *proto_name = avio_find_protocol_name(url);
165 return proto_name && av_strstart(proto_name, "http", NULL);
168 static int aligned(int val)
170 return ((val + 0x3F) >> 6) << 6;
173 static uint64_t get_current_time_in_sec(void)
175 return av_gettime() / 1000000;
178 static uint64_t get_utc_date_time_insec(AVFormatContext *s, const char *datetime)
189 /* ISO-8601 date parser */
193 ret = sscanf(datetime, "%d-%d-%dT%d:%d:%fZ", &year, &month, &day, &hour, &minute, &second);
194 /* year, month, day, hour, minute, second 6 arguments */
196 av_log(s, AV_LOG_WARNING, "get_utc_date_time_insec get a wrong time format\n");
198 timeinfo.tm_year = year - 1900;
199 timeinfo.tm_mon = month - 1;
200 timeinfo.tm_mday = day;
201 timeinfo.tm_hour = hour;
202 timeinfo.tm_min = minute;
203 timeinfo.tm_sec = (int)second;
205 return av_timegm(&timeinfo);
208 static uint32_t get_duration_insec(AVFormatContext *s, const char *duration)
210 /* ISO-8601 duration parser */
218 const char *ptr = duration;
221 if (*ptr == 'P' || *ptr == 'T') {
226 if (sscanf(ptr, "%f%c%n", &value, &type, &size) != 2) {
227 av_log(s, AV_LOG_WARNING, "get_duration_insec get a wrong time format\n");
228 return 0; /* parser error */
232 days = (uint32_t)value;
235 hours = (uint32_t)value;
238 mins = (uint32_t)value;
241 secs = (uint32_t)value;
244 // handle invalid type
249 return ((days * 24 + hours) * 60 + mins) * 60 + secs;
252 static int64_t get_segment_start_time_based_on_timeline(struct representation *pls, int64_t cur_seq_no)
254 int64_t start_time = 0;
259 if (pls->n_timelines) {
260 for (i = 0; i < pls->n_timelines; i++) {
261 if (pls->timelines[i]->starttime > 0) {
262 start_time = pls->timelines[i]->starttime;
264 if (num == cur_seq_no)
267 start_time += pls->timelines[i]->duration;
269 if (pls->timelines[i]->repeat == -1) {
270 start_time = pls->timelines[i]->duration * cur_seq_no;
274 for (j = 0; j < pls->timelines[i]->repeat; j++) {
276 if (num == cur_seq_no)
278 start_time += pls->timelines[i]->duration;
287 static int64_t calc_next_seg_no_from_timelines(struct representation *pls, int64_t cur_time)
292 int64_t start_time = 0;
294 for (i = 0; i < pls->n_timelines; i++) {
295 if (pls->timelines[i]->starttime > 0) {
296 start_time = pls->timelines[i]->starttime;
298 if (start_time > cur_time)
301 start_time += pls->timelines[i]->duration;
302 for (j = 0; j < pls->timelines[i]->repeat; j++) {
304 if (start_time > cur_time)
306 start_time += pls->timelines[i]->duration;
317 static void free_fragment(struct fragment **seg)
322 av_freep(&(*seg)->url);
326 static void free_fragment_list(struct representation *pls)
330 for (i = 0; i < pls->n_fragments; i++) {
331 free_fragment(&pls->fragments[i]);
333 av_freep(&pls->fragments);
334 pls->n_fragments = 0;
337 static void free_timelines_list(struct representation *pls)
341 for (i = 0; i < pls->n_timelines; i++) {
342 av_freep(&pls->timelines[i]);
344 av_freep(&pls->timelines);
345 pls->n_timelines = 0;
348 static void free_representation(struct representation *pls)
350 free_fragment_list(pls);
351 free_timelines_list(pls);
352 free_fragment(&pls->cur_seg);
353 free_fragment(&pls->init_section);
354 av_freep(&pls->init_sec_buf);
355 av_freep(&pls->pb.buffer);
356 ff_format_io_close(pls->parent, &pls->input);
359 avformat_close_input(&pls->ctx);
362 av_freep(&pls->url_template);
363 av_freep(&pls->lang);
367 static void free_video_list(DASHContext *c)
370 for (i = 0; i < c->n_videos; i++) {
371 struct representation *pls = c->videos[i];
372 free_representation(pls);
374 av_freep(&c->videos);
378 static void free_audio_list(DASHContext *c)
381 for (i = 0; i < c->n_audios; i++) {
382 struct representation *pls = c->audios[i];
383 free_representation(pls);
385 av_freep(&c->audios);
389 static void free_subtitle_list(DASHContext *c)
392 for (i = 0; i < c->n_subtitles; i++) {
393 struct representation *pls = c->subtitles[i];
394 free_representation(pls);
396 av_freep(&c->subtitles);
400 static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url,
401 AVDictionary **opts, AVDictionary *opts2, int *is_http)
403 DASHContext *c = s->priv_data;
404 AVDictionary *tmp = NULL;
405 const char *proto_name = NULL;
408 if (av_strstart(url, "crypto", NULL)) {
409 if (url[6] == '+' || url[6] == ':')
410 proto_name = avio_find_protocol_name(url + 7);
414 proto_name = avio_find_protocol_name(url);
417 return AVERROR_INVALIDDATA;
419 // only http(s) & file are allowed
420 if (av_strstart(proto_name, "file", NULL)) {
421 if (strcmp(c->allowed_extensions, "ALL") && !av_match_ext(url, c->allowed_extensions)) {
422 av_log(s, AV_LOG_ERROR,
423 "Filename extension of \'%s\' is not a common multimedia extension, blocked for security reasons.\n"
424 "If you wish to override this adjust allowed_extensions, you can set it to \'ALL\' to allow all\n",
426 return AVERROR_INVALIDDATA;
428 } else if (av_strstart(proto_name, "http", NULL)) {
431 return AVERROR_INVALIDDATA;
433 if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':')
435 else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':')
437 else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))
438 return AVERROR_INVALIDDATA;
441 av_dict_copy(&tmp, *opts, 0);
442 av_dict_copy(&tmp, opts2, 0);
443 ret = avio_open2(pb, url, AVIO_FLAG_READ, c->interrupt_callback, &tmp);
445 // update cookies on http response with setcookies.
446 char *new_cookies = NULL;
448 if (!(s->flags & AVFMT_FLAG_CUSTOM_IO))
449 av_opt_get(*pb, "cookies", AV_OPT_SEARCH_CHILDREN, (uint8_t**)&new_cookies);
452 av_dict_set(opts, "cookies", new_cookies, AV_DICT_DONT_STRDUP_VAL);
460 *is_http = av_strstart(proto_name, "http", NULL);
465 static char *get_content_url(xmlNodePtr *baseurl_nodes,
469 char *rep_bandwidth_val,
475 char *tmp_str = av_mallocz(max_url_size);
480 for (i = 0; i < n_baseurl_nodes; ++i) {
481 if (baseurl_nodes[i] &&
482 baseurl_nodes[i]->children &&
483 baseurl_nodes[i]->children->type == XML_TEXT_NODE) {
484 text = xmlNodeGetContent(baseurl_nodes[i]->children);
486 memset(tmp_str, 0, max_url_size);
487 ff_make_absolute_url(tmp_str, max_url_size, "", text);
494 ff_make_absolute_url(tmp_str, max_url_size, tmp_str, val);
497 url = av_strireplace(tmp_str, "$RepresentationID$", rep_id_val);
501 av_strlcpy(tmp_str, url, max_url_size);
503 if (rep_bandwidth_val && tmp_str[0] != '\0') {
504 // free any previously assigned url before reassigning
506 url = av_strireplace(tmp_str, "$Bandwidth$", rep_bandwidth_val);
516 static char *get_val_from_nodes_tab(xmlNodePtr *nodes, const int n_nodes, const char *attrname)
521 for (i = 0; i < n_nodes; ++i) {
523 val = xmlGetProp(nodes[i], attrname);
532 static xmlNodePtr find_child_node_by_name(xmlNodePtr rootnode, const char *nodename)
534 xmlNodePtr node = rootnode;
539 node = xmlFirstElementChild(node);
541 if (!av_strcasecmp(node->name, nodename)) {
544 node = xmlNextElementSibling(node);
549 static enum AVMediaType get_content_type(xmlNodePtr node)
551 enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
557 for (i = 0; i < 2; i++) {
558 attr = i ? "mimeType" : "contentType";
559 val = xmlGetProp(node, attr);
561 if (av_stristr(val, "video")) {
562 type = AVMEDIA_TYPE_VIDEO;
563 } else if (av_stristr(val, "audio")) {
564 type = AVMEDIA_TYPE_AUDIO;
565 } else if (av_stristr(val, "text")) {
566 type = AVMEDIA_TYPE_SUBTITLE;
575 static struct fragment * get_Fragment(char *range)
577 struct fragment * seg = av_mallocz(sizeof(struct fragment));
584 char *str_end_offset;
585 char *str_offset = av_strtok(range, "-", &str_end_offset);
586 seg->url_offset = strtoll(str_offset, NULL, 10);
587 seg->size = strtoll(str_end_offset, NULL, 10) - seg->url_offset + 1;
593 static int parse_manifest_segmenturlnode(AVFormatContext *s, struct representation *rep,
594 xmlNodePtr fragmenturl_node,
595 xmlNodePtr *baseurl_nodes,
597 char *rep_bandwidth_val)
599 DASHContext *c = s->priv_data;
600 char *initialization_val = NULL;
601 char *media_val = NULL;
602 char *range_val = NULL;
603 int max_url_size = c ? c->max_url_size: MAX_URL_SIZE;
606 if (!av_strcasecmp(fragmenturl_node->name, "Initialization")) {
607 initialization_val = xmlGetProp(fragmenturl_node, "sourceURL");
608 range_val = xmlGetProp(fragmenturl_node, "range");
609 if (initialization_val || range_val) {
610 free_fragment(&rep->init_section);
611 rep->init_section = get_Fragment(range_val);
613 if (!rep->init_section) {
614 xmlFree(initialization_val);
615 return AVERROR(ENOMEM);
617 rep->init_section->url = get_content_url(baseurl_nodes, 4,
622 xmlFree(initialization_val);
623 if (!rep->init_section->url) {
624 av_freep(&rep->init_section);
625 return AVERROR(ENOMEM);
628 } else if (!av_strcasecmp(fragmenturl_node->name, "SegmentURL")) {
629 media_val = xmlGetProp(fragmenturl_node, "media");
630 range_val = xmlGetProp(fragmenturl_node, "mediaRange");
631 if (media_val || range_val) {
632 struct fragment *seg = get_Fragment(range_val);
636 return AVERROR(ENOMEM);
638 seg->url = get_content_url(baseurl_nodes, 4,
646 return AVERROR(ENOMEM);
648 err = av_dynarray_add_nofree(&rep->fragments, &rep->n_fragments, seg);
659 static int parse_manifest_segmenttimeline(AVFormatContext *s, struct representation *rep,
660 xmlNodePtr fragment_timeline_node)
662 xmlAttrPtr attr = NULL;
666 if (!av_strcasecmp(fragment_timeline_node->name, "S")) {
667 struct timeline *tml = av_mallocz(sizeof(struct timeline));
669 return AVERROR(ENOMEM);
671 attr = fragment_timeline_node->properties;
673 val = xmlGetProp(fragment_timeline_node, attr->name);
676 av_log(s, AV_LOG_WARNING, "parse_manifest_segmenttimeline attr->name = %s val is NULL\n", attr->name);
680 if (!av_strcasecmp(attr->name, "t")) {
681 tml->starttime = (int64_t)strtoll(val, NULL, 10);
682 } else if (!av_strcasecmp(attr->name, "r")) {
683 tml->repeat =(int64_t) strtoll(val, NULL, 10);
684 } else if (!av_strcasecmp(attr->name, "d")) {
685 tml->duration = (int64_t)strtoll(val, NULL, 10);
690 err = av_dynarray_add_nofree(&rep->timelines, &rep->n_timelines, tml);
700 static int resolve_content_path(AVFormatContext *s, const char *url, int *max_url_size, xmlNodePtr *baseurl_nodes, int n_baseurl_nodes)
702 char *tmp_str = NULL;
704 char *mpdName = NULL;
705 xmlNodePtr node = NULL;
706 char *baseurl = NULL;
707 char *root_url = NULL;
717 int tmp_max_url_size = strlen(url);
719 for (i = n_baseurl_nodes-1; i >= 0 ; i--) {
720 text = xmlNodeGetContent(baseurl_nodes[i]);
723 tmp_max_url_size += strlen(text);
731 tmp_max_url_size = aligned(tmp_max_url_size);
732 text = av_mallocz(tmp_max_url_size);
734 updated = AVERROR(ENOMEM);
737 av_strlcpy(text, url, strlen(url)+1);
739 while (mpdName = av_strtok(tmp, "/", &tmp)) {
740 size = strlen(mpdName);
744 path = av_mallocz(tmp_max_url_size);
745 tmp_str = av_mallocz(tmp_max_url_size);
746 if (!tmp_str || !path) {
747 updated = AVERROR(ENOMEM);
751 av_strlcpy (path, url, strlen(url) - size + 1);
752 for (rootId = n_baseurl_nodes - 1; rootId > 0; rootId --) {
753 if (!(node = baseurl_nodes[rootId])) {
756 text = xmlNodeGetContent(node);
764 node = baseurl_nodes[rootId];
765 baseurl = xmlNodeGetContent(node);
766 root_url = (av_strcasecmp(baseurl, "")) ? baseurl : path;
768 xmlNodeSetContent(node, root_url);
772 size = strlen(root_url);
773 isRootHttp = ishttp(root_url);
775 if (size > 0 && root_url[size - 1] != token) {
776 av_strlcat(root_url, "/", size + 2);
780 for (i = 0; i < n_baseurl_nodes; ++i) {
784 text = xmlNodeGetContent(baseurl_nodes[i]);
785 if (text && !av_strstart(text, "/", NULL)) {
786 memset(tmp_str, 0, strlen(tmp_str));
787 if (!ishttp(text) && isRootHttp) {
788 av_strlcpy(tmp_str, root_url, size + 1);
790 start = (text[0] == token);
791 if (start && av_stristr(tmp_str, text)) {
793 if (!av_strncasecmp(tmp_str, "http://", 7)) {
795 } else if (!av_strncasecmp(tmp_str, "https://", 8)) {
799 memset(p + 1, 0, strlen(p));
801 av_strlcat(tmp_str, text + start, tmp_max_url_size);
802 xmlNodeSetContent(baseurl_nodes[i], tmp_str);
809 if (tmp_max_url_size > *max_url_size) {
810 *max_url_size = tmp_max_url_size;
819 static int parse_manifest_representation(AVFormatContext *s, const char *url,
821 xmlNodePtr adaptionset_node,
822 xmlNodePtr mpd_baseurl_node,
823 xmlNodePtr period_baseurl_node,
824 xmlNodePtr period_segmenttemplate_node,
825 xmlNodePtr period_segmentlist_node,
826 xmlNodePtr fragment_template_node,
827 xmlNodePtr content_component_node,
828 xmlNodePtr adaptionset_baseurl_node,
829 xmlNodePtr adaptionset_segmentlist_node,
830 xmlNodePtr adaptionset_supplementalproperty_node)
833 DASHContext *c = s->priv_data;
834 struct representation *rep = NULL;
835 struct fragment *seg = NULL;
836 xmlNodePtr representation_segmenttemplate_node = NULL;
837 xmlNodePtr representation_baseurl_node = NULL;
838 xmlNodePtr representation_segmentlist_node = NULL;
839 xmlNodePtr segmentlists_tab[3];
840 xmlNodePtr fragment_timeline_node = NULL;
841 xmlNodePtr fragment_templates_tab[5];
843 xmlNodePtr baseurl_nodes[4];
844 xmlNodePtr representation_node = node;
845 char *rep_id_val, *rep_bandwidth_val;
846 enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
848 // try get information from representation
849 if (type == AVMEDIA_TYPE_UNKNOWN)
850 type = get_content_type(representation_node);
851 // try get information from contentComponen
852 if (type == AVMEDIA_TYPE_UNKNOWN)
853 type = get_content_type(content_component_node);
854 // try get information from adaption set
855 if (type == AVMEDIA_TYPE_UNKNOWN)
856 type = get_content_type(adaptionset_node);
857 if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO &&
858 type != AVMEDIA_TYPE_SUBTITLE) {
859 av_log(s, AV_LOG_VERBOSE, "Parsing '%s' - skipp not supported representation type\n", url);
863 // convert selected representation to our internal struct
864 rep = av_mallocz(sizeof(struct representation));
866 return AVERROR(ENOMEM);
867 if (c->adaptionset_lang) {
868 rep->lang = av_strdup(c->adaptionset_lang);
870 av_log(s, AV_LOG_ERROR, "alloc language memory failure\n");
872 return AVERROR(ENOMEM);
876 representation_segmenttemplate_node = find_child_node_by_name(representation_node, "SegmentTemplate");
877 representation_baseurl_node = find_child_node_by_name(representation_node, "BaseURL");
878 representation_segmentlist_node = find_child_node_by_name(representation_node, "SegmentList");
879 rep_id_val = xmlGetProp(representation_node, "id");
880 rep_bandwidth_val = xmlGetProp(representation_node, "bandwidth");
882 baseurl_nodes[0] = mpd_baseurl_node;
883 baseurl_nodes[1] = period_baseurl_node;
884 baseurl_nodes[2] = adaptionset_baseurl_node;
885 baseurl_nodes[3] = representation_baseurl_node;
887 ret = resolve_content_path(s, url, &c->max_url_size, baseurl_nodes, 4);
888 c->max_url_size = aligned(c->max_url_size
889 + (rep_id_val ? strlen(rep_id_val) : 0)
890 + (rep_bandwidth_val ? strlen(rep_bandwidth_val) : 0));
891 if (ret == AVERROR(ENOMEM) || ret == 0)
893 if (representation_segmenttemplate_node || fragment_template_node || period_segmenttemplate_node) {
894 fragment_timeline_node = NULL;
895 fragment_templates_tab[0] = representation_segmenttemplate_node;
896 fragment_templates_tab[1] = adaptionset_segmentlist_node;
897 fragment_templates_tab[2] = fragment_template_node;
898 fragment_templates_tab[3] = period_segmenttemplate_node;
899 fragment_templates_tab[4] = period_segmentlist_node;
901 val = get_val_from_nodes_tab(fragment_templates_tab, 4, "initialization");
903 rep->init_section = av_mallocz(sizeof(struct fragment));
904 if (!rep->init_section) {
908 c->max_url_size = aligned(c->max_url_size + strlen(val));
909 rep->init_section->url = get_content_url(baseurl_nodes, 4, c->max_url_size, rep_id_val, rep_bandwidth_val, val);
911 if (!rep->init_section->url)
913 rep->init_section->size = -1;
915 val = get_val_from_nodes_tab(fragment_templates_tab, 4, "media");
917 c->max_url_size = aligned(c->max_url_size + strlen(val));
918 rep->url_template = get_content_url(baseurl_nodes, 4, c->max_url_size, rep_id_val, rep_bandwidth_val, val);
921 val = get_val_from_nodes_tab(fragment_templates_tab, 4, "presentationTimeOffset");
923 rep->presentation_timeoffset = (int64_t) strtoll(val, NULL, 10);
924 av_log(s, AV_LOG_TRACE, "rep->presentation_timeoffset = [%"PRId64"]\n", rep->presentation_timeoffset);
927 val = get_val_from_nodes_tab(fragment_templates_tab, 4, "duration");
929 rep->fragment_duration = (int64_t) strtoll(val, NULL, 10);
930 av_log(s, AV_LOG_TRACE, "rep->fragment_duration = [%"PRId64"]\n", rep->fragment_duration);
933 val = get_val_from_nodes_tab(fragment_templates_tab, 4, "timescale");
935 rep->fragment_timescale = (int64_t) strtoll(val, NULL, 10);
936 av_log(s, AV_LOG_TRACE, "rep->fragment_timescale = [%"PRId64"]\n", rep->fragment_timescale);
939 val = get_val_from_nodes_tab(fragment_templates_tab, 4, "startNumber");
941 rep->start_number = rep->first_seq_no = (int64_t) strtoll(val, NULL, 10);
942 av_log(s, AV_LOG_TRACE, "rep->first_seq_no = [%"PRId64"]\n", rep->first_seq_no);
945 if (adaptionset_supplementalproperty_node) {
946 if (!av_strcasecmp(xmlGetProp(adaptionset_supplementalproperty_node,"schemeIdUri"), "http://dashif.org/guidelines/last-segment-number")) {
947 val = xmlGetProp(adaptionset_supplementalproperty_node,"value");
949 av_log(s, AV_LOG_ERROR, "Missing value attribute in adaptionset_supplementalproperty_node\n");
951 rep->last_seq_no =(int64_t) strtoll(val, NULL, 10) - 1;
957 fragment_timeline_node = find_child_node_by_name(representation_segmenttemplate_node, "SegmentTimeline");
959 if (!fragment_timeline_node)
960 fragment_timeline_node = find_child_node_by_name(fragment_template_node, "SegmentTimeline");
961 if (!fragment_timeline_node)
962 fragment_timeline_node = find_child_node_by_name(adaptionset_segmentlist_node, "SegmentTimeline");
963 if (!fragment_timeline_node)
964 fragment_timeline_node = find_child_node_by_name(period_segmentlist_node, "SegmentTimeline");
965 if (fragment_timeline_node) {
966 fragment_timeline_node = xmlFirstElementChild(fragment_timeline_node);
967 while (fragment_timeline_node) {
968 ret = parse_manifest_segmenttimeline(s, rep, fragment_timeline_node);
971 fragment_timeline_node = xmlNextElementSibling(fragment_timeline_node);
974 } else if (representation_baseurl_node && !representation_segmentlist_node) {
975 seg = av_mallocz(sizeof(struct fragment));
978 ret = av_dynarray_add_nofree(&rep->fragments, &rep->n_fragments, seg);
983 seg->url = get_content_url(baseurl_nodes, 4, c->max_url_size, rep_id_val, rep_bandwidth_val, NULL);
987 } else if (representation_segmentlist_node) {
988 // TODO: https://www.brendanlong.com/the-structure-of-an-mpeg-dash-mpd.html
989 // http://www-itec.uni-klu.ac.at/dash/ddash/mpdGenerator.php?fragmentlength=15&type=full
990 xmlNodePtr fragmenturl_node = NULL;
991 segmentlists_tab[0] = representation_segmentlist_node;
992 segmentlists_tab[1] = adaptionset_segmentlist_node;
993 segmentlists_tab[2] = period_segmentlist_node;
995 val = get_val_from_nodes_tab(segmentlists_tab, 3, "duration");
997 rep->fragment_duration = (int64_t) strtoll(val, NULL, 10);
998 av_log(s, AV_LOG_TRACE, "rep->fragment_duration = [%"PRId64"]\n", rep->fragment_duration);
1001 val = get_val_from_nodes_tab(segmentlists_tab, 3, "timescale");
1003 rep->fragment_timescale = (int64_t) strtoll(val, NULL, 10);
1004 av_log(s, AV_LOG_TRACE, "rep->fragment_timescale = [%"PRId64"]\n", rep->fragment_timescale);
1007 val = get_val_from_nodes_tab(segmentlists_tab, 3, "startNumber");
1009 rep->start_number = rep->first_seq_no = (int64_t) strtoll(val, NULL, 10);
1010 av_log(s, AV_LOG_TRACE, "rep->first_seq_no = [%"PRId64"]\n", rep->first_seq_no);
1014 fragmenturl_node = xmlFirstElementChild(representation_segmentlist_node);
1015 while (fragmenturl_node) {
1016 ret = parse_manifest_segmenturlnode(s, rep, fragmenturl_node,
1022 fragmenturl_node = xmlNextElementSibling(fragmenturl_node);
1025 fragment_timeline_node = find_child_node_by_name(adaptionset_segmentlist_node, "SegmentTimeline");
1026 if (!fragment_timeline_node)
1027 fragment_timeline_node = find_child_node_by_name(period_segmentlist_node, "SegmentTimeline");
1028 if (fragment_timeline_node) {
1029 fragment_timeline_node = xmlFirstElementChild(fragment_timeline_node);
1030 while (fragment_timeline_node) {
1031 ret = parse_manifest_segmenttimeline(s, rep, fragment_timeline_node);
1034 fragment_timeline_node = xmlNextElementSibling(fragment_timeline_node);
1038 av_log(s, AV_LOG_ERROR, "Unknown format of Representation node id[%s] \n", rep_id_val);
1042 if (rep->fragment_duration > 0 && !rep->fragment_timescale)
1043 rep->fragment_timescale = 1;
1044 rep->bandwidth = rep_bandwidth_val ? atoi(rep_bandwidth_val) : 0;
1045 strncpy(rep->id, rep_id_val ? rep_id_val : "", sizeof(rep->id));
1046 rep->framerate = av_make_q(0, 0);
1047 if (type == AVMEDIA_TYPE_VIDEO) {
1048 char *rep_framerate_val = xmlGetProp(representation_node, "frameRate");
1049 if (rep_framerate_val) {
1050 ret = av_parse_video_rate(&rep->framerate, rep_framerate_val);
1052 av_log(s, AV_LOG_VERBOSE, "Ignoring invalid frame rate '%s'\n", rep_framerate_val);
1053 xmlFree(rep_framerate_val);
1058 case AVMEDIA_TYPE_VIDEO:
1059 ret = av_dynarray_add_nofree(&c->videos, &c->n_videos, rep);
1061 case AVMEDIA_TYPE_AUDIO:
1062 ret = av_dynarray_add_nofree(&c->audios, &c->n_audios, rep);
1064 case AVMEDIA_TYPE_SUBTITLE:
1065 ret = av_dynarray_add_nofree(&c->subtitles, &c->n_subtitles, rep);
1073 xmlFree(rep_id_val);
1074 if (rep_bandwidth_val)
1075 xmlFree(rep_bandwidth_val);
1079 ret = AVERROR(ENOMEM);
1081 free_representation(rep);
1085 static int parse_manifest_adaptationset_attr(AVFormatContext *s, xmlNodePtr adaptionset_node)
1087 DASHContext *c = s->priv_data;
1089 if (!adaptionset_node) {
1090 av_log(s, AV_LOG_WARNING, "Cannot get AdaptionSet\n");
1091 return AVERROR(EINVAL);
1093 c->adaptionset_lang = xmlGetProp(adaptionset_node, "lang");
1098 static int parse_manifest_adaptationset(AVFormatContext *s, const char *url,
1099 xmlNodePtr adaptionset_node,
1100 xmlNodePtr mpd_baseurl_node,
1101 xmlNodePtr period_baseurl_node,
1102 xmlNodePtr period_segmenttemplate_node,
1103 xmlNodePtr period_segmentlist_node)
1106 DASHContext *c = s->priv_data;
1107 xmlNodePtr fragment_template_node = NULL;
1108 xmlNodePtr content_component_node = NULL;
1109 xmlNodePtr adaptionset_baseurl_node = NULL;
1110 xmlNodePtr adaptionset_segmentlist_node = NULL;
1111 xmlNodePtr adaptionset_supplementalproperty_node = NULL;
1112 xmlNodePtr node = NULL;
1114 ret = parse_manifest_adaptationset_attr(s, adaptionset_node);
1118 node = xmlFirstElementChild(adaptionset_node);
1120 if (!av_strcasecmp(node->name, "SegmentTemplate")) {
1121 fragment_template_node = node;
1122 } else if (!av_strcasecmp(node->name, "ContentComponent")) {
1123 content_component_node = node;
1124 } else if (!av_strcasecmp(node->name, "BaseURL")) {
1125 adaptionset_baseurl_node = node;
1126 } else if (!av_strcasecmp(node->name, "SegmentList")) {
1127 adaptionset_segmentlist_node = node;
1128 } else if (!av_strcasecmp(node->name, "SupplementalProperty")) {
1129 adaptionset_supplementalproperty_node = node;
1130 } else if (!av_strcasecmp(node->name, "Representation")) {
1131 ret = parse_manifest_representation(s, url, node,
1134 period_baseurl_node,
1135 period_segmenttemplate_node,
1136 period_segmentlist_node,
1137 fragment_template_node,
1138 content_component_node,
1139 adaptionset_baseurl_node,
1140 adaptionset_segmentlist_node,
1141 adaptionset_supplementalproperty_node);
1145 node = xmlNextElementSibling(node);
1149 xmlFree(c->adaptionset_lang);
1150 c->adaptionset_lang = NULL;
1154 static int parse_programinformation(AVFormatContext *s, xmlNodePtr node)
1156 xmlChar *val = NULL;
1158 node = xmlFirstElementChild(node);
1160 if (!av_strcasecmp(node->name, "Title")) {
1161 val = xmlNodeGetContent(node);
1163 av_dict_set(&s->metadata, "Title", val, 0);
1165 } else if (!av_strcasecmp(node->name, "Source")) {
1166 val = xmlNodeGetContent(node);
1168 av_dict_set(&s->metadata, "Source", val, 0);
1170 } else if (!av_strcasecmp(node->name, "Copyright")) {
1171 val = xmlNodeGetContent(node);
1173 av_dict_set(&s->metadata, "Copyright", val, 0);
1176 node = xmlNextElementSibling(node);
1183 static int parse_manifest(AVFormatContext *s, const char *url, AVIOContext *in)
1185 DASHContext *c = s->priv_data;
1188 int64_t filesize = 0;
1190 AVDictionary *opts = NULL;
1192 xmlNodePtr root_element = NULL;
1193 xmlNodePtr node = NULL;
1194 xmlNodePtr period_node = NULL;
1195 xmlNodePtr tmp_node = NULL;
1196 xmlNodePtr mpd_baseurl_node = NULL;
1197 xmlNodePtr period_baseurl_node = NULL;
1198 xmlNodePtr period_segmenttemplate_node = NULL;
1199 xmlNodePtr period_segmentlist_node = NULL;
1200 xmlNodePtr adaptionset_node = NULL;
1201 xmlAttrPtr attr = NULL;
1203 uint32_t period_duration_sec = 0;
1204 uint32_t period_start_sec = 0;
1209 av_dict_copy(&opts, c->avio_opts, 0);
1210 ret = avio_open2(&in, url, AVIO_FLAG_READ, c->interrupt_callback, &opts);
1211 av_dict_free(&opts);
1216 if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, (uint8_t**)&c->base_url) < 0)
1217 c->base_url = av_strdup(url);
1219 filesize = avio_size(in);
1220 filesize = filesize > 0 ? filesize : DEFAULT_MANIFEST_SIZE;
1222 if (filesize > MAX_BPRINT_READ_SIZE) {
1223 av_log(s, AV_LOG_ERROR, "Manifest too large: %"PRId64"\n", filesize);
1224 return AVERROR_INVALIDDATA;
1227 av_bprint_init(&buf, filesize + 1, AV_BPRINT_SIZE_UNLIMITED);
1229 if ((ret = avio_read_to_bprint(in, &buf, MAX_BPRINT_READ_SIZE)) < 0 ||
1231 (filesize = buf.len) == 0) {
1232 av_log(s, AV_LOG_ERROR, "Unable to read to manifest '%s'\n", url);
1234 ret = AVERROR_INVALIDDATA;
1238 doc = xmlReadMemory(buf.str, filesize, c->base_url, NULL, 0);
1239 root_element = xmlDocGetRootElement(doc);
1240 node = root_element;
1243 ret = AVERROR_INVALIDDATA;
1244 av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing root node\n", url);
1248 if (node->type != XML_ELEMENT_NODE ||
1249 av_strcasecmp(node->name, "MPD")) {
1250 ret = AVERROR_INVALIDDATA;
1251 av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - wrong root node name[%s] type[%d]\n", url, node->name, (int)node->type);
1255 val = xmlGetProp(node, "type");
1257 av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing type attrib\n", url);
1258 ret = AVERROR_INVALIDDATA;
1261 if (!av_strcasecmp(val, "dynamic"))
1265 attr = node->properties;
1267 val = xmlGetProp(node, attr->name);
1269 if (!av_strcasecmp(attr->name, "availabilityStartTime")) {
1270 c->availability_start_time = get_utc_date_time_insec(s, val);
1271 av_log(s, AV_LOG_TRACE, "c->availability_start_time = [%"PRId64"]\n", c->availability_start_time);
1272 } else if (!av_strcasecmp(attr->name, "availabilityEndTime")) {
1273 c->availability_end_time = get_utc_date_time_insec(s, val);
1274 av_log(s, AV_LOG_TRACE, "c->availability_end_time = [%"PRId64"]\n", c->availability_end_time);
1275 } else if (!av_strcasecmp(attr->name, "publishTime")) {
1276 c->publish_time = get_utc_date_time_insec(s, val);
1277 av_log(s, AV_LOG_TRACE, "c->publish_time = [%"PRId64"]\n", c->publish_time);
1278 } else if (!av_strcasecmp(attr->name, "minimumUpdatePeriod")) {
1279 c->minimum_update_period = get_duration_insec(s, val);
1280 av_log(s, AV_LOG_TRACE, "c->minimum_update_period = [%"PRId64"]\n", c->minimum_update_period);
1281 } else if (!av_strcasecmp(attr->name, "timeShiftBufferDepth")) {
1282 c->time_shift_buffer_depth = get_duration_insec(s, val);
1283 av_log(s, AV_LOG_TRACE, "c->time_shift_buffer_depth = [%"PRId64"]\n", c->time_shift_buffer_depth);
1284 } else if (!av_strcasecmp(attr->name, "minBufferTime")) {
1285 c->min_buffer_time = get_duration_insec(s, val);
1286 av_log(s, AV_LOG_TRACE, "c->min_buffer_time = [%"PRId64"]\n", c->min_buffer_time);
1287 } else if (!av_strcasecmp(attr->name, "suggestedPresentationDelay")) {
1288 c->suggested_presentation_delay = get_duration_insec(s, val);
1289 av_log(s, AV_LOG_TRACE, "c->suggested_presentation_delay = [%"PRId64"]\n", c->suggested_presentation_delay);
1290 } else if (!av_strcasecmp(attr->name, "mediaPresentationDuration")) {
1291 c->media_presentation_duration = get_duration_insec(s, val);
1292 av_log(s, AV_LOG_TRACE, "c->media_presentation_duration = [%"PRId64"]\n", c->media_presentation_duration);
1298 tmp_node = find_child_node_by_name(node, "BaseURL");
1300 mpd_baseurl_node = xmlCopyNode(tmp_node,1);
1302 mpd_baseurl_node = xmlNewNode(NULL, "BaseURL");
1305 // at now we can handle only one period, with the longest duration
1306 node = xmlFirstElementChild(node);
1308 if (!av_strcasecmp(node->name, "Period")) {
1309 period_duration_sec = 0;
1310 period_start_sec = 0;
1311 attr = node->properties;
1313 val = xmlGetProp(node, attr->name);
1314 if (!av_strcasecmp(attr->name, "duration")) {
1315 period_duration_sec = get_duration_insec(s, val);
1316 } else if (!av_strcasecmp(attr->name, "start")) {
1317 period_start_sec = get_duration_insec(s, val);
1322 if ((period_duration_sec) >= (c->period_duration)) {
1324 c->period_duration = period_duration_sec;
1325 c->period_start = period_start_sec;
1326 if (c->period_start > 0)
1327 c->media_presentation_duration = c->period_duration;
1329 } else if (!av_strcasecmp(node->name, "ProgramInformation")) {
1330 parse_programinformation(s, node);
1332 node = xmlNextElementSibling(node);
1335 av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing Period node\n", url);
1336 ret = AVERROR_INVALIDDATA;
1340 adaptionset_node = xmlFirstElementChild(period_node);
1341 while (adaptionset_node) {
1342 if (!av_strcasecmp(adaptionset_node->name, "BaseURL")) {
1343 period_baseurl_node = adaptionset_node;
1344 } else if (!av_strcasecmp(adaptionset_node->name, "SegmentTemplate")) {
1345 period_segmenttemplate_node = adaptionset_node;
1346 } else if (!av_strcasecmp(adaptionset_node->name, "SegmentList")) {
1347 period_segmentlist_node = adaptionset_node;
1348 } else if (!av_strcasecmp(adaptionset_node->name, "AdaptationSet")) {
1349 parse_manifest_adaptationset(s, url, adaptionset_node, mpd_baseurl_node, period_baseurl_node, period_segmenttemplate_node, period_segmentlist_node);
1351 adaptionset_node = xmlNextElementSibling(adaptionset_node);
1354 /*free the document */
1357 xmlFreeNode(mpd_baseurl_node);
1360 av_bprint_finalize(&buf, NULL);
1367 static int64_t calc_cur_seg_no(AVFormatContext *s, struct representation *pls)
1369 DASHContext *c = s->priv_data;
1371 int64_t start_time_offset = 0;
1374 if (pls->n_fragments) {
1375 av_log(s, AV_LOG_TRACE, "in n_fragments mode\n");
1376 num = pls->first_seq_no;
1377 } else if (pls->n_timelines) {
1378 av_log(s, AV_LOG_TRACE, "in n_timelines mode\n");
1379 start_time_offset = get_segment_start_time_based_on_timeline(pls, 0xFFFFFFFF) - 60 * pls->fragment_timescale; // 60 seconds before end
1380 num = calc_next_seg_no_from_timelines(pls, start_time_offset);
1382 num = pls->first_seq_no;
1384 num += pls->first_seq_no;
1385 } else if (pls->fragment_duration){
1386 av_log(s, AV_LOG_TRACE, "in fragment_duration mode fragment_timescale = %"PRId64", presentation_timeoffset = %"PRId64"\n", pls->fragment_timescale, pls->presentation_timeoffset);
1387 if (pls->presentation_timeoffset) {
1388 num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time) * pls->fragment_timescale)-pls->presentation_timeoffset) / pls->fragment_duration - c->min_buffer_time;
1389 } else if (c->publish_time > 0 && !c->availability_start_time) {
1390 if (c->min_buffer_time) {
1391 num = pls->first_seq_no + (((c->publish_time + pls->fragment_duration) - c->suggested_presentation_delay) * pls->fragment_timescale) / pls->fragment_duration - c->min_buffer_time;
1393 num = pls->first_seq_no + (((c->publish_time - c->time_shift_buffer_depth + pls->fragment_duration) - c->suggested_presentation_delay) * pls->fragment_timescale) / pls->fragment_duration;
1396 num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time) - c->suggested_presentation_delay) * pls->fragment_timescale) / pls->fragment_duration;
1400 num = pls->first_seq_no;
1405 static int64_t calc_min_seg_no(AVFormatContext *s, struct representation *pls)
1407 DASHContext *c = s->priv_data;
1410 if (c->is_live && pls->fragment_duration) {
1411 av_log(s, AV_LOG_TRACE, "in live mode\n");
1412 num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time) - c->time_shift_buffer_depth) * pls->fragment_timescale) / pls->fragment_duration;
1414 num = pls->first_seq_no;
1419 static int64_t calc_max_seg_no(struct representation *pls, DASHContext *c)
1423 if (pls->n_fragments) {
1424 num = pls->first_seq_no + pls->n_fragments - 1;
1425 } else if (pls->n_timelines) {
1427 num = pls->first_seq_no + pls->n_timelines - 1;
1428 for (i = 0; i < pls->n_timelines; i++) {
1429 if (pls->timelines[i]->repeat == -1) {
1430 int length_of_each_segment = pls->timelines[i]->duration / pls->fragment_timescale;
1431 num = c->period_duration / length_of_each_segment;
1433 num += pls->timelines[i]->repeat;
1436 } else if (c->is_live && pls->fragment_duration) {
1437 num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time)) * pls->fragment_timescale) / pls->fragment_duration;
1438 } else if (pls->fragment_duration) {
1439 num = pls->first_seq_no + (c->media_presentation_duration * pls->fragment_timescale) / pls->fragment_duration;
1445 static void move_timelines(struct representation *rep_src, struct representation *rep_dest, DASHContext *c)
1447 if (rep_dest && rep_src ) {
1448 free_timelines_list(rep_dest);
1449 rep_dest->timelines = rep_src->timelines;
1450 rep_dest->n_timelines = rep_src->n_timelines;
1451 rep_dest->first_seq_no = rep_src->first_seq_no;
1452 rep_dest->last_seq_no = calc_max_seg_no(rep_dest, c);
1453 rep_src->timelines = NULL;
1454 rep_src->n_timelines = 0;
1455 rep_dest->cur_seq_no = rep_src->cur_seq_no;
1459 static void move_segments(struct representation *rep_src, struct representation *rep_dest, DASHContext *c)
1461 if (rep_dest && rep_src ) {
1462 free_fragment_list(rep_dest);
1463 if (rep_src->start_number > (rep_dest->start_number + rep_dest->n_fragments))
1464 rep_dest->cur_seq_no = 0;
1466 rep_dest->cur_seq_no += rep_src->start_number - rep_dest->start_number;
1467 rep_dest->fragments = rep_src->fragments;
1468 rep_dest->n_fragments = rep_src->n_fragments;
1469 rep_dest->parent = rep_src->parent;
1470 rep_dest->last_seq_no = calc_max_seg_no(rep_dest, c);
1471 rep_src->fragments = NULL;
1472 rep_src->n_fragments = 0;
1477 static int refresh_manifest(AVFormatContext *s)
1480 DASHContext *c = s->priv_data;
1481 // save current context
1482 int n_videos = c->n_videos;
1483 struct representation **videos = c->videos;
1484 int n_audios = c->n_audios;
1485 struct representation **audios = c->audios;
1486 int n_subtitles = c->n_subtitles;
1487 struct representation **subtitles = c->subtitles;
1488 char *base_url = c->base_url;
1496 c->subtitles = NULL;
1497 ret = parse_manifest(s, s->url, NULL);
1501 if (c->n_videos != n_videos) {
1502 av_log(c, AV_LOG_ERROR,
1503 "new manifest has mismatched no. of video representations, %d -> %d\n",
1504 n_videos, c->n_videos);
1505 return AVERROR_INVALIDDATA;
1507 if (c->n_audios != n_audios) {
1508 av_log(c, AV_LOG_ERROR,
1509 "new manifest has mismatched no. of audio representations, %d -> %d\n",
1510 n_audios, c->n_audios);
1511 return AVERROR_INVALIDDATA;
1513 if (c->n_subtitles != n_subtitles) {
1514 av_log(c, AV_LOG_ERROR,
1515 "new manifest has mismatched no. of subtitles representations, %d -> %d\n",
1516 n_subtitles, c->n_subtitles);
1517 return AVERROR_INVALIDDATA;
1520 for (i = 0; i < n_videos; i++) {
1521 struct representation *cur_video = videos[i];
1522 struct representation *ccur_video = c->videos[i];
1523 if (cur_video->timelines) {
1524 // calc current time
1525 int64_t currentTime = get_segment_start_time_based_on_timeline(cur_video, cur_video->cur_seq_no) / cur_video->fragment_timescale;
1527 ccur_video->cur_seq_no = calc_next_seg_no_from_timelines(ccur_video, currentTime * cur_video->fragment_timescale - 1);
1528 if (ccur_video->cur_seq_no >= 0) {
1529 move_timelines(ccur_video, cur_video, c);
1532 if (cur_video->fragments) {
1533 move_segments(ccur_video, cur_video, c);
1536 for (i = 0; i < n_audios; i++) {
1537 struct representation *cur_audio = audios[i];
1538 struct representation *ccur_audio = c->audios[i];
1539 if (cur_audio->timelines) {
1540 // calc current time
1541 int64_t currentTime = get_segment_start_time_based_on_timeline(cur_audio, cur_audio->cur_seq_no) / cur_audio->fragment_timescale;
1543 ccur_audio->cur_seq_no = calc_next_seg_no_from_timelines(ccur_audio, currentTime * cur_audio->fragment_timescale - 1);
1544 if (ccur_audio->cur_seq_no >= 0) {
1545 move_timelines(ccur_audio, cur_audio, c);
1548 if (cur_audio->fragments) {
1549 move_segments(ccur_audio, cur_audio, c);
1558 c->base_url = base_url;
1561 free_subtitle_list(c);
1567 c->n_subtitles = n_subtitles;
1568 c->subtitles = subtitles;
1569 c->n_audios = n_audios;
1571 c->n_videos = n_videos;
1576 static struct fragment *get_current_fragment(struct representation *pls)
1578 int64_t min_seq_no = 0;
1579 int64_t max_seq_no = 0;
1580 struct fragment *seg = NULL;
1581 struct fragment *seg_ptr = NULL;
1582 DASHContext *c = pls->parent->priv_data;
1584 while (( !ff_check_interrupt(c->interrupt_callback)&& pls->n_fragments > 0)) {
1585 if (pls->cur_seq_no < pls->n_fragments) {
1586 seg_ptr = pls->fragments[pls->cur_seq_no];
1587 seg = av_mallocz(sizeof(struct fragment));
1591 seg->url = av_strdup(seg_ptr->url);
1596 seg->size = seg_ptr->size;
1597 seg->url_offset = seg_ptr->url_offset;
1599 } else if (c->is_live) {
1600 refresh_manifest(pls->parent);
1606 min_seq_no = calc_min_seg_no(pls->parent, pls);
1607 max_seq_no = calc_max_seg_no(pls, c);
1609 if (pls->timelines || pls->fragments) {
1610 refresh_manifest(pls->parent);
1612 if (pls->cur_seq_no <= min_seq_no) {
1613 av_log(pls->parent, AV_LOG_VERBOSE, "old fragment: cur[%"PRId64"] min[%"PRId64"] max[%"PRId64"]\n", (int64_t)pls->cur_seq_no, min_seq_no, max_seq_no);
1614 pls->cur_seq_no = calc_cur_seg_no(pls->parent, pls);
1615 } else if (pls->cur_seq_no > max_seq_no) {
1616 av_log(pls->parent, AV_LOG_VERBOSE, "new fragment: min[%"PRId64"] max[%"PRId64"]\n", min_seq_no, max_seq_no);
1618 seg = av_mallocz(sizeof(struct fragment));
1622 } else if (pls->cur_seq_no <= pls->last_seq_no) {
1623 seg = av_mallocz(sizeof(struct fragment));
1630 if (!pls->url_template) {
1631 av_log(pls->parent, AV_LOG_ERROR, "Cannot get fragment, missing template URL\n");
1635 tmpfilename = av_mallocz(c->max_url_size);
1640 ff_dash_fill_tmpl_params(tmpfilename, c->max_url_size, pls->url_template, 0, pls->cur_seq_no, 0, get_segment_start_time_based_on_timeline(pls, pls->cur_seq_no));
1641 seg->url = av_strireplace(pls->url_template, pls->url_template, tmpfilename);
1643 av_log(pls->parent, AV_LOG_WARNING, "Unable to resolve template url '%s', try to use origin template\n", pls->url_template);
1644 seg->url = av_strdup(pls->url_template);
1646 av_log(pls->parent, AV_LOG_ERROR, "Cannot resolve template url '%s'\n", pls->url_template);
1647 av_free(tmpfilename);
1652 av_free(tmpfilename);
1659 static int read_from_url(struct representation *pls, struct fragment *seg,
1660 uint8_t *buf, int buf_size)
1664 /* limit read if the fragment was only a part of a file */
1666 buf_size = FFMIN(buf_size, pls->cur_seg_size - pls->cur_seg_offset);
1668 ret = avio_read(pls->input, buf, buf_size);
1670 pls->cur_seg_offset += ret;
1675 static int open_input(DASHContext *c, struct representation *pls, struct fragment *seg)
1677 AVDictionary *opts = NULL;
1681 url = av_mallocz(c->max_url_size);
1683 ret = AVERROR(ENOMEM);
1687 if (seg->size >= 0) {
1688 /* try to restrict the HTTP request to the part we want
1689 * (if this is in fact a HTTP request) */
1690 av_dict_set_int(&opts, "offset", seg->url_offset, 0);
1691 av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
1694 ff_make_absolute_url(url, c->max_url_size, c->base_url, seg->url);
1695 av_log(pls->parent, AV_LOG_VERBOSE, "DASH request for url '%s', offset %"PRId64"\n",
1696 url, seg->url_offset);
1697 ret = open_url(pls->parent, &pls->input, url, &c->avio_opts, opts, NULL);
1701 av_dict_free(&opts);
1702 pls->cur_seg_offset = 0;
1703 pls->cur_seg_size = seg->size;
1707 static int update_init_section(struct representation *pls)
1709 static const int max_init_section_size = 1024 * 1024;
1710 DASHContext *c = pls->parent->priv_data;
1715 if (!pls->init_section || pls->init_sec_buf)
1718 ret = open_input(c, pls, pls->init_section);
1720 av_log(pls->parent, AV_LOG_WARNING,
1721 "Failed to open an initialization section\n");
1725 if (pls->init_section->size >= 0)
1726 sec_size = pls->init_section->size;
1727 else if ((urlsize = avio_size(pls->input)) >= 0)
1730 sec_size = max_init_section_size;
1732 av_log(pls->parent, AV_LOG_DEBUG,
1733 "Downloading an initialization section of size %"PRId64"\n",
1736 sec_size = FFMIN(sec_size, max_init_section_size);
1738 av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size);
1740 ret = read_from_url(pls, pls->init_section, pls->init_sec_buf,
1741 pls->init_sec_buf_size);
1742 ff_format_io_close(pls->parent, &pls->input);
1747 pls->init_sec_data_len = ret;
1748 pls->init_sec_buf_read_offset = 0;
1753 static int64_t seek_data(void *opaque, int64_t offset, int whence)
1755 struct representation *v = opaque;
1756 if (v->n_fragments && !v->init_sec_data_len) {
1757 return avio_seek(v->input, offset, whence);
1760 return AVERROR(ENOSYS);
1763 static int read_data(void *opaque, uint8_t *buf, int buf_size)
1766 struct representation *v = opaque;
1767 DASHContext *c = v->parent->priv_data;
1771 free_fragment(&v->cur_seg);
1772 v->cur_seg = get_current_fragment(v);
1778 /* load/update Media Initialization Section, if any */
1779 ret = update_init_section(v);
1783 ret = open_input(c, v, v->cur_seg);
1785 if (ff_check_interrupt(c->interrupt_callback)) {
1789 av_log(v->parent, AV_LOG_WARNING, "Failed to open fragment of playlist\n");
1795 if (v->init_sec_buf_read_offset < v->init_sec_data_len) {
1796 /* Push init section out first before first actual fragment */
1797 int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size);
1798 memcpy(buf, v->init_sec_buf, copy_size);
1799 v->init_sec_buf_read_offset += copy_size;
1804 /* check the v->cur_seg, if it is null, get current and double check if the new v->cur_seg*/
1806 v->cur_seg = get_current_fragment(v);
1812 ret = read_from_url(v, v->cur_seg, buf, buf_size);
1816 if (c->is_live || v->cur_seq_no < v->last_seq_no) {
1817 if (!v->is_restart_needed)
1819 v->is_restart_needed = 1;
1826 static int save_avio_options(AVFormatContext *s)
1828 DASHContext *c = s->priv_data;
1829 const char *opts[] = {
1830 "headers", "user_agent", "cookies", "http_proxy", "referer", "rw_timeout", "icy", NULL };
1831 const char **opt = opts;
1832 uint8_t *buf = NULL;
1836 if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN, &buf) >= 0) {
1837 if (buf[0] != '\0') {
1838 ret = av_dict_set(&c->avio_opts, *opt, buf, AV_DICT_DONT_STRDUP_VAL);
1851 static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url,
1852 int flags, AVDictionary **opts)
1854 av_log(s, AV_LOG_ERROR,
1855 "A DASH playlist item '%s' referred to an external file '%s'. "
1856 "Opening this file was forbidden for security reasons\n",
1858 return AVERROR(EPERM);
1861 static void close_demux_for_component(struct representation *pls)
1863 /* note: the internal buffer could have changed */
1864 av_freep(&pls->pb.buffer);
1865 memset(&pls->pb, 0x00, sizeof(AVIOContext));
1866 pls->ctx->pb = NULL;
1867 avformat_close_input(&pls->ctx);
1870 static int reopen_demux_for_component(AVFormatContext *s, struct representation *pls)
1872 DASHContext *c = s->priv_data;
1873 ff_const59 AVInputFormat *in_fmt = NULL;
1874 AVDictionary *in_fmt_opts = NULL;
1875 uint8_t *avio_ctx_buffer = NULL;
1879 close_demux_for_component(pls);
1882 if (ff_check_interrupt(&s->interrupt_callback)) {
1887 if (!(pls->ctx = avformat_alloc_context())) {
1888 ret = AVERROR(ENOMEM);
1892 avio_ctx_buffer = av_malloc(INITIAL_BUFFER_SIZE);
1893 if (!avio_ctx_buffer ) {
1894 ret = AVERROR(ENOMEM);
1895 avformat_free_context(pls->ctx);
1899 ffio_init_context(&pls->pb, avio_ctx_buffer, INITIAL_BUFFER_SIZE, 0,
1900 pls, read_data, NULL, c->is_live ? NULL : seek_data);
1901 pls->pb.seekable = 0;
1903 if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
1906 pls->ctx->flags = AVFMT_FLAG_CUSTOM_IO;
1907 pls->ctx->probesize = s->probesize > 0 ? s->probesize : 1024 * 4;
1908 pls->ctx->max_analyze_duration = s->max_analyze_duration > 0 ? s->max_analyze_duration : 4 * AV_TIME_BASE;
1909 pls->ctx->interrupt_callback = s->interrupt_callback;
1910 ret = av_probe_input_buffer(&pls->pb, &in_fmt, "", NULL, 0, 0);
1912 av_log(s, AV_LOG_ERROR, "Error when loading first fragment of playlist\n");
1913 avformat_free_context(pls->ctx);
1918 pls->ctx->pb = &pls->pb;
1919 pls->ctx->io_open = nested_io_open;
1921 // provide additional information from mpd if available
1922 ret = avformat_open_input(&pls->ctx, "", in_fmt, &in_fmt_opts); //pls->init_section->url
1923 av_dict_free(&in_fmt_opts);
1926 if (pls->n_fragments) {
1927 #if FF_API_R_FRAME_RATE
1928 if (pls->framerate.den) {
1929 for (i = 0; i < pls->ctx->nb_streams; i++)
1930 pls->ctx->streams[i]->r_frame_rate = pls->framerate;
1933 ret = avformat_find_stream_info(pls->ctx, NULL);
1942 static int open_demux_for_component(AVFormatContext *s, struct representation *pls)
1948 pls->cur_seq_no = calc_cur_seg_no(s, pls);
1950 if (!pls->last_seq_no) {
1951 pls->last_seq_no = calc_max_seg_no(pls, s->priv_data);
1954 ret = reopen_demux_for_component(s, pls);
1958 for (i = 0; i < pls->ctx->nb_streams; i++) {
1959 AVStream *st = avformat_new_stream(s, NULL);
1960 AVStream *ist = pls->ctx->streams[i];
1962 ret = AVERROR(ENOMEM);
1966 avcodec_parameters_copy(st->codecpar, ist->codecpar);
1967 avpriv_set_pts_info(st, ist->pts_wrap_bits, ist->time_base.num, ist->time_base.den);
1970 st->disposition = ist->disposition;
1973 for (int i = 0; i < ist->nb_side_data; i++) {
1974 const AVPacketSideData *sd_src = &ist->side_data[i];
1977 dst_data = av_stream_new_side_data(st, sd_src->type, sd_src->size);
1979 return AVERROR(ENOMEM);
1980 memcpy(dst_data, sd_src->data, sd_src->size);
1989 static int is_common_init_section_exist(struct representation **pls, int n_pls)
1991 struct fragment *first_init_section = pls[0]->init_section;
1993 int64_t url_offset = -1;
1997 if (first_init_section == NULL || n_pls == 0)
2000 url = first_init_section->url;
2001 url_offset = first_init_section->url_offset;
2002 size = pls[0]->init_section->size;
2003 for (i=0;i<n_pls;i++) {
2004 if (!pls[i]->init_section)
2007 if (av_strcasecmp(pls[i]->init_section->url, url) ||
2008 pls[i]->init_section->url_offset != url_offset ||
2009 pls[i]->init_section->size != size) {
2016 static int copy_init_section(struct representation *rep_dest, struct representation *rep_src)
2018 rep_dest->init_sec_buf = av_mallocz(rep_src->init_sec_buf_size);
2019 if (!rep_dest->init_sec_buf) {
2020 av_log(rep_dest->ctx, AV_LOG_WARNING, "Cannot alloc memory for init_sec_buf\n");
2021 return AVERROR(ENOMEM);
2023 memcpy(rep_dest->init_sec_buf, rep_src->init_sec_buf, rep_src->init_sec_data_len);
2024 rep_dest->init_sec_buf_size = rep_src->init_sec_buf_size;
2025 rep_dest->init_sec_data_len = rep_src->init_sec_data_len;
2026 rep_dest->cur_timestamp = rep_src->cur_timestamp;
2031 static int dash_close(AVFormatContext *s);
2033 static int dash_read_header(AVFormatContext *s)
2035 DASHContext *c = s->priv_data;
2036 struct representation *rep;
2039 int stream_index = 0;
2042 c->interrupt_callback = &s->interrupt_callback;
2044 if ((ret = save_avio_options(s)) < 0)
2047 if ((ret = parse_manifest(s, s->url, s->pb)) < 0)
2050 /* If this isn't a live stream, fill the total duration of the
2053 s->duration = (int64_t) c->media_presentation_duration * AV_TIME_BASE;
2055 av_dict_set(&c->avio_opts, "seekable", "0", 0);
2059 c->is_init_section_common_video = is_common_init_section_exist(c->videos, c->n_videos);
2061 /* Open the demuxer for video and audio components if available */
2062 for (i = 0; i < c->n_videos; i++) {
2064 if (i > 0 && c->is_init_section_common_video) {
2065 ret = copy_init_section(rep, c->videos[0]);
2069 ret = open_demux_for_component(s, rep);
2073 rep->stream_index = stream_index;
2078 c->is_init_section_common_audio = is_common_init_section_exist(c->audios, c->n_audios);
2080 for (i = 0; i < c->n_audios; i++) {
2082 if (i > 0 && c->is_init_section_common_audio) {
2083 ret = copy_init_section(rep, c->audios[0]);
2087 ret = open_demux_for_component(s, rep);
2091 rep->stream_index = stream_index;
2096 c->is_init_section_common_subtitle = is_common_init_section_exist(c->subtitles, c->n_subtitles);
2098 for (i = 0; i < c->n_subtitles; i++) {
2099 rep = c->subtitles[i];
2100 if (i > 0 && c->is_init_section_common_subtitle) {
2101 ret = copy_init_section(rep, c->subtitles[0]);
2105 ret = open_demux_for_component(s, rep);
2109 rep->stream_index = stream_index;
2113 if (!stream_index) {
2114 ret = AVERROR_INVALIDDATA;
2118 /* Create a program */
2119 program = av_new_program(s, 0);
2121 ret = AVERROR(ENOMEM);
2125 for (i = 0; i < c->n_videos; i++) {
2127 av_program_add_stream_index(s, 0, rep->stream_index);
2128 rep->assoc_stream = s->streams[rep->stream_index];
2129 if (rep->bandwidth > 0)
2130 av_dict_set_int(&rep->assoc_stream->metadata, "variant_bitrate", rep->bandwidth, 0);
2132 av_dict_set(&rep->assoc_stream->metadata, "id", rep->id, 0);
2134 for (i = 0; i < c->n_audios; i++) {
2136 av_program_add_stream_index(s, 0, rep->stream_index);
2137 rep->assoc_stream = s->streams[rep->stream_index];
2138 if (rep->bandwidth > 0)
2139 av_dict_set_int(&rep->assoc_stream->metadata, "variant_bitrate", rep->bandwidth, 0);
2141 av_dict_set(&rep->assoc_stream->metadata, "id", rep->id, 0);
2143 av_dict_set(&rep->assoc_stream->metadata, "language", rep->lang, 0);
2144 av_freep(&rep->lang);
2147 for (i = 0; i < c->n_subtitles; i++) {
2148 rep = c->subtitles[i];
2149 av_program_add_stream_index(s, 0, rep->stream_index);
2150 rep->assoc_stream = s->streams[rep->stream_index];
2152 av_dict_set(&rep->assoc_stream->metadata, "id", rep->id, 0);
2154 av_dict_set(&rep->assoc_stream->metadata, "language", rep->lang, 0);
2155 av_freep(&rep->lang);
2165 static void recheck_discard_flags(AVFormatContext *s, struct representation **p, int n)
2169 for (i = 0; i < n; i++) {
2170 struct representation *pls = p[i];
2171 int needed = !pls->assoc_stream || pls->assoc_stream->discard < AVDISCARD_ALL;
2173 if (needed && !pls->ctx) {
2174 pls->cur_seg_offset = 0;
2175 pls->init_sec_buf_read_offset = 0;
2177 for (j = 0; j < n; j++) {
2178 pls->cur_seq_no = FFMAX(pls->cur_seq_no, p[j]->cur_seq_no);
2180 reopen_demux_for_component(s, pls);
2181 av_log(s, AV_LOG_INFO, "Now receiving stream_index %d\n", pls->stream_index);
2182 } else if (!needed && pls->ctx) {
2183 close_demux_for_component(pls);
2184 ff_format_io_close(pls->parent, &pls->input);
2185 av_log(s, AV_LOG_INFO, "No longer receiving stream_index %d\n", pls->stream_index);
2190 static int dash_read_packet(AVFormatContext *s, AVPacket *pkt)
2192 DASHContext *c = s->priv_data;
2195 struct representation *cur = NULL;
2196 struct representation *rep = NULL;
2198 recheck_discard_flags(s, c->videos, c->n_videos);
2199 recheck_discard_flags(s, c->audios, c->n_audios);
2200 recheck_discard_flags(s, c->subtitles, c->n_subtitles);
2202 for (i = 0; i < c->n_videos; i++) {
2206 if (!cur || rep->cur_timestamp < mints) {
2208 mints = rep->cur_timestamp;
2211 for (i = 0; i < c->n_audios; i++) {
2215 if (!cur || rep->cur_timestamp < mints) {
2217 mints = rep->cur_timestamp;
2221 for (i = 0; i < c->n_subtitles; i++) {
2222 rep = c->subtitles[i];
2225 if (!cur || rep->cur_timestamp < mints) {
2227 mints = rep->cur_timestamp;
2232 return AVERROR_INVALIDDATA;
2234 while (!ff_check_interrupt(c->interrupt_callback) && !ret) {
2235 ret = av_read_frame(cur->ctx, pkt);
2237 /* If we got a packet, return it */
2238 cur->cur_timestamp = av_rescale(pkt->pts, (int64_t)cur->ctx->streams[0]->time_base.num * 90000, cur->ctx->streams[0]->time_base.den);
2239 pkt->stream_index = cur->stream_index;
2242 if (cur->is_restart_needed) {
2243 cur->cur_seg_offset = 0;
2244 cur->init_sec_buf_read_offset = 0;
2245 ff_format_io_close(cur->parent, &cur->input);
2246 ret = reopen_demux_for_component(s, cur);
2247 cur->is_restart_needed = 0;
2253 static int dash_close(AVFormatContext *s)
2255 DASHContext *c = s->priv_data;
2258 free_subtitle_list(c);
2259 av_dict_free(&c->avio_opts);
2260 av_freep(&c->base_url);
2264 static int dash_seek(AVFormatContext *s, struct representation *pls, int64_t seek_pos_msec, int flags, int dry_run)
2269 int64_t duration = 0;
2271 av_log(pls->parent, AV_LOG_VERBOSE, "DASH seek pos[%"PRId64"ms] %s\n",
2272 seek_pos_msec, dry_run ? " (dry)" : "");
2274 // single fragment mode
2275 if (pls->n_fragments == 1) {
2276 pls->cur_timestamp = 0;
2277 pls->cur_seg_offset = 0;
2280 ff_read_frame_flush(pls->ctx);
2281 return av_seek_frame(pls->ctx, -1, seek_pos_msec * 1000, flags);
2284 ff_format_io_close(pls->parent, &pls->input);
2286 // find the nearest fragment
2287 if (pls->n_timelines > 0 && pls->fragment_timescale > 0) {
2288 int64_t num = pls->first_seq_no;
2289 av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with SegmentTimeline start n_timelines[%d] "
2290 "last_seq_no[%"PRId64"].\n",
2291 (int)pls->n_timelines, (int64_t)pls->last_seq_no);
2292 for (i = 0; i < pls->n_timelines; i++) {
2293 if (pls->timelines[i]->starttime > 0) {
2294 duration = pls->timelines[i]->starttime;
2296 duration += pls->timelines[i]->duration;
2297 if (seek_pos_msec < ((duration * 1000) / pls->fragment_timescale)) {
2300 for (j = 0; j < pls->timelines[i]->repeat; j++) {
2301 duration += pls->timelines[i]->duration;
2303 if (seek_pos_msec < ((duration * 1000) / pls->fragment_timescale)) {
2311 pls->cur_seq_no = num > pls->last_seq_no ? pls->last_seq_no : num;
2312 av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with SegmentTimeline end cur_seq_no[%"PRId64"].\n",
2313 (int64_t)pls->cur_seq_no);
2314 } else if (pls->fragment_duration > 0) {
2315 pls->cur_seq_no = pls->first_seq_no + ((seek_pos_msec * pls->fragment_timescale) / pls->fragment_duration) / 1000;
2317 av_log(pls->parent, AV_LOG_ERROR, "dash_seek missing timeline or fragment_duration\n");
2318 pls->cur_seq_no = pls->first_seq_no;
2320 pls->cur_timestamp = 0;
2321 pls->cur_seg_offset = 0;
2322 pls->init_sec_buf_read_offset = 0;
2323 ret = dry_run ? 0 : reopen_demux_for_component(s, pls);
2328 static int dash_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
2331 DASHContext *c = s->priv_data;
2332 int64_t seek_pos_msec = av_rescale_rnd(timestamp, 1000,
2333 s->streams[stream_index]->time_base.den,
2334 flags & AVSEEK_FLAG_BACKWARD ?
2335 AV_ROUND_DOWN : AV_ROUND_UP);
2336 if ((flags & AVSEEK_FLAG_BYTE) || c->is_live)
2337 return AVERROR(ENOSYS);
2339 /* Seek in discarded streams with dry_run=1 to avoid reopening them */
2340 for (i = 0; i < c->n_videos; i++) {
2342 ret = dash_seek(s, c->videos[i], seek_pos_msec, flags, !c->videos[i]->ctx);
2344 for (i = 0; i < c->n_audios; i++) {
2346 ret = dash_seek(s, c->audios[i], seek_pos_msec, flags, !c->audios[i]->ctx);
2348 for (i = 0; i < c->n_subtitles; i++) {
2350 ret = dash_seek(s, c->subtitles[i], seek_pos_msec, flags, !c->subtitles[i]->ctx);
2356 static int dash_probe(const AVProbeData *p)
2358 if (!av_stristr(p->buf, "<MPD"))
2361 if (av_stristr(p->buf, "dash:profile:isoff-on-demand:2011") ||
2362 av_stristr(p->buf, "dash:profile:isoff-live:2011") ||
2363 av_stristr(p->buf, "dash:profile:isoff-live:2012") ||
2364 av_stristr(p->buf, "dash:profile:isoff-main:2011") ||
2365 av_stristr(p->buf, "3GPP:PSS:profile:DASH1")) {
2366 return AVPROBE_SCORE_MAX;
2368 if (av_stristr(p->buf, "dash:profile")) {
2369 return AVPROBE_SCORE_MAX;
2375 #define OFFSET(x) offsetof(DASHContext, x)
2376 #define FLAGS AV_OPT_FLAG_DECODING_PARAM
2377 static const AVOption dash_options[] = {
2378 {"allowed_extensions", "List of file extensions that dash is allowed to access",
2379 OFFSET(allowed_extensions), AV_OPT_TYPE_STRING,
2380 {.str = "aac,m4a,m4s,m4v,mov,mp4,webm,ts"},
2381 INT_MIN, INT_MAX, FLAGS},
2385 static const AVClass dash_class = {
2386 .class_name = "dash",
2387 .item_name = av_default_item_name,
2388 .option = dash_options,
2389 .version = LIBAVUTIL_VERSION_INT,
2392 AVInputFormat ff_dash_demuxer = {
2394 .long_name = NULL_IF_CONFIG_SMALL("Dynamic Adaptive Streaming over HTTP"),
2395 .priv_class = &dash_class,
2396 .priv_data_size = sizeof(DASHContext),
2397 .read_probe = dash_probe,
2398 .read_header = dash_read_header,
2399 .read_packet = dash_read_packet,
2400 .read_close = dash_close,
2401 .read_seek = dash_read_seek,
2402 .flags = AVFMT_NO_BYTE_SEEK,