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;
161 static int ishttp(char *url)
163 const char *proto_name = avio_find_protocol_name(url);
164 return av_strstart(proto_name, "http", NULL);
167 static int aligned(int val)
169 return ((val + 0x3F) >> 6) << 6;
172 static uint64_t get_current_time_in_sec(void)
174 return av_gettime() / 1000000;
177 static uint64_t get_utc_date_time_insec(AVFormatContext *s, const char *datetime)
188 /* ISO-8601 date parser */
192 ret = sscanf(datetime, "%d-%d-%dT%d:%d:%fZ", &year, &month, &day, &hour, &minute, &second);
193 /* year, month, day, hour, minute, second 6 arguments */
195 av_log(s, AV_LOG_WARNING, "get_utc_date_time_insec get a wrong time format\n");
197 timeinfo.tm_year = year - 1900;
198 timeinfo.tm_mon = month - 1;
199 timeinfo.tm_mday = day;
200 timeinfo.tm_hour = hour;
201 timeinfo.tm_min = minute;
202 timeinfo.tm_sec = (int)second;
204 return av_timegm(&timeinfo);
207 static uint32_t get_duration_insec(AVFormatContext *s, const char *duration)
209 /* ISO-8601 duration parser */
217 const char *ptr = duration;
220 if (*ptr == 'P' || *ptr == 'T') {
225 if (sscanf(ptr, "%f%c%n", &value, &type, &size) != 2) {
226 av_log(s, AV_LOG_WARNING, "get_duration_insec get a wrong time format\n");
227 return 0; /* parser error */
231 days = (uint32_t)value;
234 hours = (uint32_t)value;
237 mins = (uint32_t)value;
240 secs = (uint32_t)value;
243 // handle invalid type
248 return ((days * 24 + hours) * 60 + mins) * 60 + secs;
251 static int64_t get_segment_start_time_based_on_timeline(struct representation *pls, int64_t cur_seq_no)
253 int64_t start_time = 0;
258 if (pls->n_timelines) {
259 for (i = 0; i < pls->n_timelines; i++) {
260 if (pls->timelines[i]->starttime > 0) {
261 start_time = pls->timelines[i]->starttime;
263 if (num == cur_seq_no)
266 start_time += pls->timelines[i]->duration;
268 if (pls->timelines[i]->repeat == -1) {
269 start_time = pls->timelines[i]->duration * cur_seq_no;
273 for (j = 0; j < pls->timelines[i]->repeat; j++) {
275 if (num == cur_seq_no)
277 start_time += pls->timelines[i]->duration;
286 static int64_t calc_next_seg_no_from_timelines(struct representation *pls, int64_t cur_time)
291 int64_t start_time = 0;
293 for (i = 0; i < pls->n_timelines; i++) {
294 if (pls->timelines[i]->starttime > 0) {
295 start_time = pls->timelines[i]->starttime;
297 if (start_time > cur_time)
300 start_time += pls->timelines[i]->duration;
301 for (j = 0; j < pls->timelines[i]->repeat; j++) {
303 if (start_time > cur_time)
305 start_time += pls->timelines[i]->duration;
316 static void free_fragment(struct fragment **seg)
321 av_freep(&(*seg)->url);
325 static void free_fragment_list(struct representation *pls)
329 for (i = 0; i < pls->n_fragments; i++) {
330 free_fragment(&pls->fragments[i]);
332 av_freep(&pls->fragments);
333 pls->n_fragments = 0;
336 static void free_timelines_list(struct representation *pls)
340 for (i = 0; i < pls->n_timelines; i++) {
341 av_freep(&pls->timelines[i]);
343 av_freep(&pls->timelines);
344 pls->n_timelines = 0;
347 static void free_representation(struct representation *pls)
349 free_fragment_list(pls);
350 free_timelines_list(pls);
351 free_fragment(&pls->cur_seg);
352 free_fragment(&pls->init_section);
353 av_freep(&pls->init_sec_buf);
354 av_freep(&pls->pb.buffer);
355 ff_format_io_close(pls->parent, &pls->input);
358 avformat_close_input(&pls->ctx);
361 av_freep(&pls->url_template);
365 static void free_video_list(DASHContext *c)
368 for (i = 0; i < c->n_videos; i++) {
369 struct representation *pls = c->videos[i];
370 free_representation(pls);
372 av_freep(&c->videos);
376 static void free_audio_list(DASHContext *c)
379 for (i = 0; i < c->n_audios; i++) {
380 struct representation *pls = c->audios[i];
381 free_representation(pls);
383 av_freep(&c->audios);
387 static void free_subtitle_list(DASHContext *c)
390 for (i = 0; i < c->n_subtitles; i++) {
391 struct representation *pls = c->subtitles[i];
392 free_representation(pls);
394 av_freep(&c->subtitles);
398 static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url,
399 AVDictionary **opts, AVDictionary *opts2, int *is_http)
401 DASHContext *c = s->priv_data;
402 AVDictionary *tmp = NULL;
403 const char *proto_name = NULL;
406 if (av_strstart(url, "crypto", NULL)) {
407 if (url[6] == '+' || url[6] == ':')
408 proto_name = avio_find_protocol_name(url + 7);
412 proto_name = avio_find_protocol_name(url);
415 return AVERROR_INVALIDDATA;
417 // only http(s) & file are allowed
418 if (av_strstart(proto_name, "file", NULL)) {
419 if (strcmp(c->allowed_extensions, "ALL") && !av_match_ext(url, c->allowed_extensions)) {
420 av_log(s, AV_LOG_ERROR,
421 "Filename extension of \'%s\' is not a common multimedia extension, blocked for security reasons.\n"
422 "If you wish to override this adjust allowed_extensions, you can set it to \'ALL\' to allow all\n",
424 return AVERROR_INVALIDDATA;
426 } else if (av_strstart(proto_name, "http", NULL)) {
429 return AVERROR_INVALIDDATA;
431 if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':')
433 else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':')
435 else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))
436 return AVERROR_INVALIDDATA;
439 av_dict_copy(&tmp, *opts, 0);
440 av_dict_copy(&tmp, opts2, 0);
441 ret = avio_open2(pb, url, AVIO_FLAG_READ, c->interrupt_callback, &tmp);
443 // update cookies on http response with setcookies.
444 char *new_cookies = NULL;
446 if (!(s->flags & AVFMT_FLAG_CUSTOM_IO))
447 av_opt_get(*pb, "cookies", AV_OPT_SEARCH_CHILDREN, (uint8_t**)&new_cookies);
450 av_dict_set(opts, "cookies", new_cookies, AV_DICT_DONT_STRDUP_VAL);
458 *is_http = av_strstart(proto_name, "http", NULL);
463 static char *get_content_url(xmlNodePtr *baseurl_nodes,
467 char *rep_bandwidth_val,
473 char *tmp_str = av_mallocz(max_url_size);
474 char *tmp_str_2 = av_mallocz(max_url_size);
476 if (!tmp_str || !tmp_str_2) {
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 memset(tmp_str_2, 0, max_url_size);
488 ff_make_absolute_url(tmp_str_2, max_url_size, tmp_str, text);
489 av_strlcpy(tmp_str, tmp_str_2, max_url_size);
496 ff_make_absolute_url(tmp_str, max_url_size, tmp_str, val);
499 url = av_strireplace(tmp_str, "$RepresentationID$", (const char*)rep_id_val);
503 av_strlcpy(tmp_str, url, max_url_size);
505 if (rep_bandwidth_val && tmp_str[0] != '\0') {
506 // free any previously assigned url before reassigning
508 url = av_strireplace(tmp_str, "$Bandwidth$", (const char*)rep_bandwidth_val);
519 static char *get_val_from_nodes_tab(xmlNodePtr *nodes, const int n_nodes, const char *attrname)
524 for (i = 0; i < n_nodes; ++i) {
526 val = xmlGetProp(nodes[i], attrname);
535 static xmlNodePtr find_child_node_by_name(xmlNodePtr rootnode, const char *nodename)
537 xmlNodePtr node = rootnode;
542 node = xmlFirstElementChild(node);
544 if (!av_strcasecmp(node->name, nodename)) {
547 node = xmlNextElementSibling(node);
552 static enum AVMediaType get_content_type(xmlNodePtr node)
554 enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
560 for (i = 0; i < 2; i++) {
561 attr = i ? "mimeType" : "contentType";
562 val = xmlGetProp(node, attr);
564 if (av_stristr((const char *)val, "video")) {
565 type = AVMEDIA_TYPE_VIDEO;
566 } else if (av_stristr((const char *)val, "audio")) {
567 type = AVMEDIA_TYPE_AUDIO;
568 } else if (av_stristr((const char *)val, "text")) {
569 type = AVMEDIA_TYPE_SUBTITLE;
578 static struct fragment * get_Fragment(char *range)
580 struct fragment * seg = av_mallocz(sizeof(struct fragment));
587 char *str_end_offset;
588 char *str_offset = av_strtok(range, "-", &str_end_offset);
589 seg->url_offset = strtoll(str_offset, NULL, 10);
590 seg->size = strtoll(str_end_offset, NULL, 10) - seg->url_offset + 1;
596 static int parse_manifest_segmenturlnode(AVFormatContext *s, struct representation *rep,
597 xmlNodePtr fragmenturl_node,
598 xmlNodePtr *baseurl_nodes,
600 char *rep_bandwidth_val)
602 DASHContext *c = s->priv_data;
603 char *initialization_val = NULL;
604 char *media_val = NULL;
605 char *range_val = NULL;
606 int max_url_size = c ? c->max_url_size: MAX_URL_SIZE;
608 if (!av_strcasecmp(fragmenturl_node->name, (const char *)"Initialization")) {
609 initialization_val = xmlGetProp(fragmenturl_node, "sourceURL");
610 range_val = xmlGetProp(fragmenturl_node, "range");
611 if (initialization_val || range_val) {
612 free_fragment(&rep->init_section);
613 rep->init_section = get_Fragment(range_val);
615 if (!rep->init_section) {
616 xmlFree(initialization_val);
617 return AVERROR(ENOMEM);
619 rep->init_section->url = get_content_url(baseurl_nodes, 4,
624 xmlFree(initialization_val);
625 if (!rep->init_section->url) {
626 av_freep(&rep->init_section);
627 return AVERROR(ENOMEM);
630 } else if (!av_strcasecmp(fragmenturl_node->name, (const char *)"SegmentURL")) {
631 media_val = xmlGetProp(fragmenturl_node, "media");
632 range_val = xmlGetProp(fragmenturl_node, "mediaRange");
633 if (media_val || range_val) {
634 struct fragment *seg = get_Fragment(range_val);
638 return AVERROR(ENOMEM);
640 seg->url = get_content_url(baseurl_nodes, 4,
648 return AVERROR(ENOMEM);
650 dynarray_add(&rep->fragments, &rep->n_fragments, seg);
657 static int parse_manifest_segmenttimeline(AVFormatContext *s, struct representation *rep,
658 xmlNodePtr fragment_timeline_node)
660 xmlAttrPtr attr = NULL;
663 if (!av_strcasecmp(fragment_timeline_node->name, (const char *)"S")) {
664 struct timeline *tml = av_mallocz(sizeof(struct timeline));
666 return AVERROR(ENOMEM);
668 attr = fragment_timeline_node->properties;
670 val = xmlGetProp(fragment_timeline_node, attr->name);
673 av_log(s, AV_LOG_WARNING, "parse_manifest_segmenttimeline attr->name = %s val is NULL\n", attr->name);
677 if (!av_strcasecmp(attr->name, (const char *)"t")) {
678 tml->starttime = (int64_t)strtoll(val, NULL, 10);
679 } else if (!av_strcasecmp(attr->name, (const char *)"r")) {
680 tml->repeat =(int64_t) strtoll(val, NULL, 10);
681 } else if (!av_strcasecmp(attr->name, (const char *)"d")) {
682 tml->duration = (int64_t)strtoll(val, NULL, 10);
687 dynarray_add(&rep->timelines, &rep->n_timelines, tml);
693 static int resolve_content_path(AVFormatContext *s, const char *url, int *max_url_size, xmlNodePtr *baseurl_nodes, int n_baseurl_nodes)
695 char *tmp_str = NULL;
697 char *mpdName = NULL;
698 xmlNodePtr node = NULL;
699 char *baseurl = NULL;
700 char *root_url = NULL;
710 int tmp_max_url_size = strlen(url);
712 for (i = n_baseurl_nodes-1; i >= 0 ; i--) {
713 text = xmlNodeGetContent(baseurl_nodes[i]);
716 tmp_max_url_size += strlen(text);
724 tmp_max_url_size = aligned(tmp_max_url_size);
725 text = av_mallocz(tmp_max_url_size);
727 updated = AVERROR(ENOMEM);
730 av_strlcpy(text, url, strlen(url)+1);
732 while (mpdName = av_strtok(tmp, "/", &tmp)) {
733 size = strlen(mpdName);
737 path = av_mallocz(tmp_max_url_size);
738 tmp_str = av_mallocz(tmp_max_url_size);
739 if (!tmp_str || !path) {
740 updated = AVERROR(ENOMEM);
744 av_strlcpy (path, url, strlen(url) - size + 1);
745 for (rootId = n_baseurl_nodes - 1; rootId > 0; rootId --) {
746 if (!(node = baseurl_nodes[rootId])) {
749 text = xmlNodeGetContent(node);
757 node = baseurl_nodes[rootId];
758 baseurl = xmlNodeGetContent(node);
759 root_url = (av_strcasecmp(baseurl, "")) ? baseurl : path;
761 xmlNodeSetContent(node, root_url);
765 size = strlen(root_url);
766 isRootHttp = ishttp(root_url);
768 if (root_url[size - 1] != token) {
769 av_strlcat(root_url, "/", size + 2);
773 for (i = 0; i < n_baseurl_nodes; ++i) {
777 text = xmlNodeGetContent(baseurl_nodes[i]);
778 if (text && !av_strstart(text, "/", NULL)) {
779 memset(tmp_str, 0, strlen(tmp_str));
780 if (!ishttp(text) && isRootHttp) {
781 av_strlcpy(tmp_str, root_url, size + 1);
783 start = (text[0] == token);
784 if (start && av_stristr(tmp_str, text)) {
786 if (!av_strncasecmp(tmp_str, "http://", 7)) {
788 } else if (!av_strncasecmp(tmp_str, "https://", 8)) {
792 memset(p + 1, 0, strlen(p));
794 av_strlcat(tmp_str, text + start, tmp_max_url_size);
795 xmlNodeSetContent(baseurl_nodes[i], tmp_str);
802 if (tmp_max_url_size > *max_url_size) {
803 *max_url_size = tmp_max_url_size;
812 static int parse_manifest_representation(AVFormatContext *s, const char *url,
814 xmlNodePtr adaptionset_node,
815 xmlNodePtr mpd_baseurl_node,
816 xmlNodePtr period_baseurl_node,
817 xmlNodePtr period_segmenttemplate_node,
818 xmlNodePtr period_segmentlist_node,
819 xmlNodePtr fragment_template_node,
820 xmlNodePtr content_component_node,
821 xmlNodePtr adaptionset_baseurl_node,
822 xmlNodePtr adaptionset_segmentlist_node,
823 xmlNodePtr adaptionset_supplementalproperty_node)
826 DASHContext *c = s->priv_data;
827 struct representation *rep = NULL;
828 struct fragment *seg = NULL;
829 xmlNodePtr representation_segmenttemplate_node = NULL;
830 xmlNodePtr representation_baseurl_node = NULL;
831 xmlNodePtr representation_segmentlist_node = NULL;
832 xmlNodePtr segmentlists_tab[3];
833 xmlNodePtr fragment_timeline_node = NULL;
834 xmlNodePtr fragment_templates_tab[5];
835 char *duration_val = NULL;
836 char *presentation_timeoffset_val = NULL;
837 char *startnumber_val = NULL;
838 char *timescale_val = NULL;
839 char *initialization_val = NULL;
840 char *media_val = NULL;
842 xmlNodePtr baseurl_nodes[4];
843 xmlNodePtr representation_node = node;
844 char *rep_id_val = xmlGetProp(representation_node, "id");
845 char *rep_bandwidth_val = xmlGetProp(representation_node, "bandwidth");
846 char *rep_framerate_val = xmlGetProp(representation_node, "frameRate");
847 enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
849 // try get information from representation
850 if (type == AVMEDIA_TYPE_UNKNOWN)
851 type = get_content_type(representation_node);
852 // try get information from contentComponen
853 if (type == AVMEDIA_TYPE_UNKNOWN)
854 type = get_content_type(content_component_node);
855 // try get information from adaption set
856 if (type == AVMEDIA_TYPE_UNKNOWN)
857 type = get_content_type(adaptionset_node);
858 if (type == AVMEDIA_TYPE_UNKNOWN) {
859 av_log(s, AV_LOG_VERBOSE, "Parsing '%s' - skipp not supported representation type\n", url);
860 } else if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO || type == AVMEDIA_TYPE_SUBTITLE) {
861 // convert selected representation to our internal struct
862 rep = av_mallocz(sizeof(struct representation));
864 ret = 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 ret = AVERROR(ENOMEM);
877 representation_segmenttemplate_node = find_child_node_by_name(representation_node, "SegmentTemplate");
878 representation_baseurl_node = find_child_node_by_name(representation_node, "BaseURL");
879 representation_segmentlist_node = find_child_node_by_name(representation_node, "SegmentList");
881 baseurl_nodes[0] = mpd_baseurl_node;
882 baseurl_nodes[1] = period_baseurl_node;
883 baseurl_nodes[2] = adaptionset_baseurl_node;
884 baseurl_nodes[3] = representation_baseurl_node;
886 ret = resolve_content_path(s, url, &c->max_url_size, baseurl_nodes, 4);
887 c->max_url_size = aligned(c->max_url_size
888 + (rep_id_val ? strlen(rep_id_val) : 0)
889 + (rep_bandwidth_val ? strlen(rep_bandwidth_val) : 0));
890 if (ret == AVERROR(ENOMEM) || ret == 0)
892 if (representation_segmenttemplate_node || fragment_template_node || period_segmenttemplate_node) {
893 fragment_timeline_node = NULL;
894 fragment_templates_tab[0] = representation_segmenttemplate_node;
895 fragment_templates_tab[1] = adaptionset_segmentlist_node;
896 fragment_templates_tab[2] = fragment_template_node;
897 fragment_templates_tab[3] = period_segmenttemplate_node;
898 fragment_templates_tab[4] = period_segmentlist_node;
900 presentation_timeoffset_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "presentationTimeOffset");
901 duration_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "duration");
902 startnumber_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "startNumber");
903 timescale_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "timescale");
904 initialization_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "initialization");
905 media_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "media");
907 if (initialization_val) {
908 rep->init_section = av_mallocz(sizeof(struct fragment));
909 if (!rep->init_section)
911 c->max_url_size = aligned(c->max_url_size + strlen(initialization_val));
912 rep->init_section->url = get_content_url(baseurl_nodes, 4, c->max_url_size, rep_id_val, rep_bandwidth_val, initialization_val);
913 if (!rep->init_section->url)
915 rep->init_section->size = -1;
916 xmlFree(initialization_val);
920 c->max_url_size = aligned(c->max_url_size + strlen(media_val));
921 rep->url_template = get_content_url(baseurl_nodes, 4, c->max_url_size, rep_id_val, rep_bandwidth_val, media_val);
925 if (presentation_timeoffset_val) {
926 rep->presentation_timeoffset = (int64_t) strtoll(presentation_timeoffset_val, NULL, 10);
927 av_log(s, AV_LOG_TRACE, "rep->presentation_timeoffset = [%"PRId64"]\n", rep->presentation_timeoffset);
928 xmlFree(presentation_timeoffset_val);
931 rep->fragment_duration = (int64_t) strtoll(duration_val, NULL, 10);
932 av_log(s, AV_LOG_TRACE, "rep->fragment_duration = [%"PRId64"]\n", rep->fragment_duration);
933 xmlFree(duration_val);
936 rep->fragment_timescale = (int64_t) strtoll(timescale_val, NULL, 10);
937 av_log(s, AV_LOG_TRACE, "rep->fragment_timescale = [%"PRId64"]\n", rep->fragment_timescale);
938 xmlFree(timescale_val);
940 if (startnumber_val) {
941 rep->start_number = rep->first_seq_no = (int64_t) strtoll(startnumber_val, NULL, 10);
942 av_log(s, AV_LOG_TRACE, "rep->first_seq_no = [%"PRId64"]\n", rep->first_seq_no);
943 xmlFree(startnumber_val);
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 seg->url = get_content_url(baseurl_nodes, 4, c->max_url_size, rep_id_val, rep_bandwidth_val, NULL);
984 dynarray_add(&rep->fragments, &rep->n_fragments, seg);
985 } else if (representation_segmentlist_node) {
986 // TODO: https://www.brendanlong.com/the-structure-of-an-mpeg-dash-mpd.html
987 // http://www-itec.uni-klu.ac.at/dash/ddash/mpdGenerator.php?fragmentlength=15&type=full
988 xmlNodePtr fragmenturl_node = NULL;
989 segmentlists_tab[0] = representation_segmentlist_node;
990 segmentlists_tab[1] = adaptionset_segmentlist_node;
991 segmentlists_tab[2] = period_segmentlist_node;
993 duration_val = get_val_from_nodes_tab(segmentlists_tab, 3, "duration");
994 timescale_val = get_val_from_nodes_tab(segmentlists_tab, 3, "timescale");
995 startnumber_val = get_val_from_nodes_tab(segmentlists_tab, 3, "startNumber");
997 rep->fragment_duration = (int64_t) strtoll(duration_val, NULL, 10);
998 av_log(s, AV_LOG_TRACE, "rep->fragment_duration = [%"PRId64"]\n", rep->fragment_duration);
999 xmlFree(duration_val);
1001 if (timescale_val) {
1002 rep->fragment_timescale = (int64_t) strtoll(timescale_val, NULL, 10);
1003 av_log(s, AV_LOG_TRACE, "rep->fragment_timescale = [%"PRId64"]\n", rep->fragment_timescale);
1004 xmlFree(timescale_val);
1006 if (startnumber_val) {
1007 rep->start_number = rep->first_seq_no = (int64_t) strtoll(startnumber_val, NULL, 10);
1008 av_log(s, AV_LOG_TRACE, "rep->first_seq_no = [%"PRId64"]\n", rep->first_seq_no);
1009 xmlFree(startnumber_val);
1012 fragmenturl_node = xmlFirstElementChild(representation_segmentlist_node);
1013 while (fragmenturl_node) {
1014 ret = parse_manifest_segmenturlnode(s, rep, fragmenturl_node,
1020 fragmenturl_node = xmlNextElementSibling(fragmenturl_node);
1023 fragment_timeline_node = find_child_node_by_name(adaptionset_segmentlist_node, "SegmentTimeline");
1024 if (!fragment_timeline_node)
1025 fragment_timeline_node = find_child_node_by_name(period_segmentlist_node, "SegmentTimeline");
1026 if (fragment_timeline_node) {
1027 fragment_timeline_node = xmlFirstElementChild(fragment_timeline_node);
1028 while (fragment_timeline_node) {
1029 ret = parse_manifest_segmenttimeline(s, rep, fragment_timeline_node);
1032 fragment_timeline_node = xmlNextElementSibling(fragment_timeline_node);
1036 av_log(s, AV_LOG_ERROR, "Unknown format of Representation node id[%s] \n", (const char *)rep_id_val);
1041 if (rep->fragment_duration > 0 && !rep->fragment_timescale)
1042 rep->fragment_timescale = 1;
1043 rep->bandwidth = rep_bandwidth_val ? atoi(rep_bandwidth_val) : 0;
1044 strncpy(rep->id, rep_id_val ? rep_id_val : "", sizeof(rep->id));
1045 rep->framerate = av_make_q(0, 0);
1046 if (type == AVMEDIA_TYPE_VIDEO && rep_framerate_val) {
1047 ret = av_parse_video_rate(&rep->framerate, rep_framerate_val);
1049 av_log(s, AV_LOG_VERBOSE, "Ignoring invalid frame rate '%s'\n", rep_framerate_val);
1053 case AVMEDIA_TYPE_VIDEO:
1054 dynarray_add(&c->videos, &c->n_videos, rep);
1056 case AVMEDIA_TYPE_AUDIO:
1057 dynarray_add(&c->audios, &c->n_audios, rep);
1059 case AVMEDIA_TYPE_SUBTITLE:
1060 dynarray_add(&c->subtitles, &c->n_subtitles, rep);
1063 av_log(s, AV_LOG_WARNING, "Unsupported the stream type %d\n", type);
1071 xmlFree(rep_id_val);
1072 if (rep_bandwidth_val)
1073 xmlFree(rep_bandwidth_val);
1074 if (rep_framerate_val)
1075 xmlFree(rep_framerate_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, (const char *)"SegmentTemplate")) {
1121 fragment_template_node = node;
1122 } else if (!av_strcasecmp(node->name, (const char *)"ContentComponent")) {
1123 content_component_node = node;
1124 } else if (!av_strcasecmp(node->name, (const char *)"BaseURL")) {
1125 adaptionset_baseurl_node = node;
1126 } else if (!av_strcasecmp(node->name, (const char *)"SegmentList")) {
1127 adaptionset_segmentlist_node = node;
1128 } else if (!av_strcasecmp(node->name, (const char *)"SupplementalProperty")) {
1129 adaptionset_supplementalproperty_node = node;
1130 } else if (!av_strcasecmp(node->name, (const char *)"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 av_freep(&c->adaptionset_lang);
1153 static int parse_programinformation(AVFormatContext *s, xmlNodePtr node)
1155 xmlChar *val = NULL;
1157 node = xmlFirstElementChild(node);
1159 if (!av_strcasecmp(node->name, "Title")) {
1160 val = xmlNodeGetContent(node);
1162 av_dict_set(&s->metadata, "Title", val, 0);
1164 } else if (!av_strcasecmp(node->name, "Source")) {
1165 val = xmlNodeGetContent(node);
1167 av_dict_set(&s->metadata, "Source", val, 0);
1169 } else if (!av_strcasecmp(node->name, "Copyright")) {
1170 val = xmlNodeGetContent(node);
1172 av_dict_set(&s->metadata, "Copyright", val, 0);
1175 node = xmlNextElementSibling(node);
1182 static int parse_manifest(AVFormatContext *s, const char *url, AVIOContext *in)
1184 DASHContext *c = s->priv_data;
1187 uint8_t *new_url = NULL;
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, &new_url) >= 0) {
1217 c->base_url = av_strdup(new_url);
1219 c->base_url = av_strdup(url);
1222 filesize = avio_size(in);
1223 filesize = filesize > 0 ? filesize : DEFAULT_MANIFEST_SIZE;
1225 if (filesize > MAX_BPRINT_READ_SIZE) {
1226 av_log(s, AV_LOG_ERROR, "Manifest too large: %"PRId64"\n", filesize);
1227 return AVERROR_INVALIDDATA;
1230 av_bprint_init(&buf, filesize + 1, AV_BPRINT_SIZE_UNLIMITED);
1232 if ((ret = avio_read_to_bprint(in, &buf, MAX_BPRINT_READ_SIZE)) < 0 ||
1234 (filesize = buf.len) == 0) {
1235 av_log(s, AV_LOG_ERROR, "Unable to read to manifest '%s'\n", url);
1237 ret = AVERROR_INVALIDDATA;
1241 doc = xmlReadMemory(buf.str, filesize, c->base_url, NULL, 0);
1242 root_element = xmlDocGetRootElement(doc);
1243 node = root_element;
1246 ret = AVERROR_INVALIDDATA;
1247 av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing root node\n", url);
1251 if (node->type != XML_ELEMENT_NODE ||
1252 av_strcasecmp(node->name, (const char *)"MPD")) {
1253 ret = AVERROR_INVALIDDATA;
1254 av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - wrong root node name[%s] type[%d]\n", url, node->name, (int)node->type);
1258 val = xmlGetProp(node, "type");
1260 av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing type attrib\n", url);
1261 ret = AVERROR_INVALIDDATA;
1264 if (!av_strcasecmp(val, (const char *)"dynamic"))
1268 attr = node->properties;
1270 val = xmlGetProp(node, attr->name);
1272 if (!av_strcasecmp(attr->name, (const char *)"availabilityStartTime")) {
1273 c->availability_start_time = get_utc_date_time_insec(s, (const char *)val);
1274 av_log(s, AV_LOG_TRACE, "c->availability_start_time = [%"PRId64"]\n", c->availability_start_time);
1275 } else if (!av_strcasecmp(attr->name, (const char *)"availabilityEndTime")) {
1276 c->availability_end_time = get_utc_date_time_insec(s, (const char *)val);
1277 av_log(s, AV_LOG_TRACE, "c->availability_end_time = [%"PRId64"]\n", c->availability_end_time);
1278 } else if (!av_strcasecmp(attr->name, (const char *)"publishTime")) {
1279 c->publish_time = get_utc_date_time_insec(s, (const char *)val);
1280 av_log(s, AV_LOG_TRACE, "c->publish_time = [%"PRId64"]\n", c->publish_time);
1281 } else if (!av_strcasecmp(attr->name, (const char *)"minimumUpdatePeriod")) {
1282 c->minimum_update_period = get_duration_insec(s, (const char *)val);
1283 av_log(s, AV_LOG_TRACE, "c->minimum_update_period = [%"PRId64"]\n", c->minimum_update_period);
1284 } else if (!av_strcasecmp(attr->name, (const char *)"timeShiftBufferDepth")) {
1285 c->time_shift_buffer_depth = get_duration_insec(s, (const char *)val);
1286 av_log(s, AV_LOG_TRACE, "c->time_shift_buffer_depth = [%"PRId64"]\n", c->time_shift_buffer_depth);
1287 } else if (!av_strcasecmp(attr->name, (const char *)"minBufferTime")) {
1288 c->min_buffer_time = get_duration_insec(s, (const char *)val);
1289 av_log(s, AV_LOG_TRACE, "c->min_buffer_time = [%"PRId64"]\n", c->min_buffer_time);
1290 } else if (!av_strcasecmp(attr->name, (const char *)"suggestedPresentationDelay")) {
1291 c->suggested_presentation_delay = get_duration_insec(s, (const char *)val);
1292 av_log(s, AV_LOG_TRACE, "c->suggested_presentation_delay = [%"PRId64"]\n", c->suggested_presentation_delay);
1293 } else if (!av_strcasecmp(attr->name, (const char *)"mediaPresentationDuration")) {
1294 c->media_presentation_duration = get_duration_insec(s, (const char *)val);
1295 av_log(s, AV_LOG_TRACE, "c->media_presentation_duration = [%"PRId64"]\n", c->media_presentation_duration);
1301 tmp_node = find_child_node_by_name(node, "BaseURL");
1303 mpd_baseurl_node = xmlCopyNode(tmp_node,1);
1305 mpd_baseurl_node = xmlNewNode(NULL, "BaseURL");
1308 // at now we can handle only one period, with the longest duration
1309 node = xmlFirstElementChild(node);
1311 if (!av_strcasecmp(node->name, (const char *)"Period")) {
1312 period_duration_sec = 0;
1313 period_start_sec = 0;
1314 attr = node->properties;
1316 val = xmlGetProp(node, attr->name);
1317 if (!av_strcasecmp(attr->name, (const char *)"duration")) {
1318 period_duration_sec = get_duration_insec(s, (const char *)val);
1319 } else if (!av_strcasecmp(attr->name, (const char *)"start")) {
1320 period_start_sec = get_duration_insec(s, (const char *)val);
1325 if ((period_duration_sec) >= (c->period_duration)) {
1327 c->period_duration = period_duration_sec;
1328 c->period_start = period_start_sec;
1329 if (c->period_start > 0)
1330 c->media_presentation_duration = c->period_duration;
1332 } else if (!av_strcasecmp(node->name, "ProgramInformation")) {
1333 parse_programinformation(s, node);
1335 node = xmlNextElementSibling(node);
1338 av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing Period node\n", url);
1339 ret = AVERROR_INVALIDDATA;
1343 adaptionset_node = xmlFirstElementChild(period_node);
1344 while (adaptionset_node) {
1345 if (!av_strcasecmp(adaptionset_node->name, (const char *)"BaseURL")) {
1346 period_baseurl_node = adaptionset_node;
1347 } else if (!av_strcasecmp(adaptionset_node->name, (const char *)"SegmentTemplate")) {
1348 period_segmenttemplate_node = adaptionset_node;
1349 } else if (!av_strcasecmp(adaptionset_node->name, (const char *)"SegmentList")) {
1350 period_segmentlist_node = adaptionset_node;
1351 } else if (!av_strcasecmp(adaptionset_node->name, (const char *)"AdaptationSet")) {
1352 parse_manifest_adaptationset(s, url, adaptionset_node, mpd_baseurl_node, period_baseurl_node, period_segmenttemplate_node, period_segmentlist_node);
1354 adaptionset_node = xmlNextElementSibling(adaptionset_node);
1357 /*free the document */
1360 xmlFreeNode(mpd_baseurl_node);
1364 av_bprint_finalize(&buf, NULL);
1371 static int64_t calc_cur_seg_no(AVFormatContext *s, struct representation *pls)
1373 DASHContext *c = s->priv_data;
1375 int64_t start_time_offset = 0;
1378 if (pls->n_fragments) {
1379 av_log(s, AV_LOG_TRACE, "in n_fragments mode\n");
1380 num = pls->first_seq_no;
1381 } else if (pls->n_timelines) {
1382 av_log(s, AV_LOG_TRACE, "in n_timelines mode\n");
1383 start_time_offset = get_segment_start_time_based_on_timeline(pls, 0xFFFFFFFF) - 60 * pls->fragment_timescale; // 60 seconds before end
1384 num = calc_next_seg_no_from_timelines(pls, start_time_offset);
1386 num = pls->first_seq_no;
1388 num += pls->first_seq_no;
1389 } else if (pls->fragment_duration){
1390 av_log(s, AV_LOG_TRACE, "in fragment_duration mode fragment_timescale = %"PRId64", presentation_timeoffset = %"PRId64"\n", pls->fragment_timescale, pls->presentation_timeoffset);
1391 if (pls->presentation_timeoffset) {
1392 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;
1393 } else if (c->publish_time > 0 && !c->availability_start_time) {
1394 if (c->min_buffer_time) {
1395 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;
1397 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;
1400 num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time) - c->suggested_presentation_delay) * pls->fragment_timescale) / pls->fragment_duration;
1404 num = pls->first_seq_no;
1409 static int64_t calc_min_seg_no(AVFormatContext *s, struct representation *pls)
1411 DASHContext *c = s->priv_data;
1414 if (c->is_live && pls->fragment_duration) {
1415 av_log(s, AV_LOG_TRACE, "in live mode\n");
1416 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;
1418 num = pls->first_seq_no;
1423 static int64_t calc_max_seg_no(struct representation *pls, DASHContext *c)
1427 if (pls->n_fragments) {
1428 num = pls->first_seq_no + pls->n_fragments - 1;
1429 } else if (pls->n_timelines) {
1431 num = pls->first_seq_no + pls->n_timelines - 1;
1432 for (i = 0; i < pls->n_timelines; i++) {
1433 if (pls->timelines[i]->repeat == -1) {
1434 int length_of_each_segment = pls->timelines[i]->duration / pls->fragment_timescale;
1435 num = c->period_duration / length_of_each_segment;
1437 num += pls->timelines[i]->repeat;
1440 } else if (c->is_live && pls->fragment_duration) {
1441 num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time)) * pls->fragment_timescale) / pls->fragment_duration;
1442 } else if (pls->fragment_duration) {
1443 num = pls->first_seq_no + (c->media_presentation_duration * pls->fragment_timescale) / pls->fragment_duration;
1449 static void move_timelines(struct representation *rep_src, struct representation *rep_dest, DASHContext *c)
1451 if (rep_dest && rep_src ) {
1452 free_timelines_list(rep_dest);
1453 rep_dest->timelines = rep_src->timelines;
1454 rep_dest->n_timelines = rep_src->n_timelines;
1455 rep_dest->first_seq_no = rep_src->first_seq_no;
1456 rep_dest->last_seq_no = calc_max_seg_no(rep_dest, c);
1457 rep_src->timelines = NULL;
1458 rep_src->n_timelines = 0;
1459 rep_dest->cur_seq_no = rep_src->cur_seq_no;
1463 static void move_segments(struct representation *rep_src, struct representation *rep_dest, DASHContext *c)
1465 if (rep_dest && rep_src ) {
1466 free_fragment_list(rep_dest);
1467 if (rep_src->start_number > (rep_dest->start_number + rep_dest->n_fragments))
1468 rep_dest->cur_seq_no = 0;
1470 rep_dest->cur_seq_no += rep_src->start_number - rep_dest->start_number;
1471 rep_dest->fragments = rep_src->fragments;
1472 rep_dest->n_fragments = rep_src->n_fragments;
1473 rep_dest->parent = rep_src->parent;
1474 rep_dest->last_seq_no = calc_max_seg_no(rep_dest, c);
1475 rep_src->fragments = NULL;
1476 rep_src->n_fragments = 0;
1481 static int refresh_manifest(AVFormatContext *s)
1484 DASHContext *c = s->priv_data;
1485 // save current context
1486 int n_videos = c->n_videos;
1487 struct representation **videos = c->videos;
1488 int n_audios = c->n_audios;
1489 struct representation **audios = c->audios;
1490 int n_subtitles = c->n_subtitles;
1491 struct representation **subtitles = c->subtitles;
1492 char *base_url = c->base_url;
1500 c->subtitles = NULL;
1501 ret = parse_manifest(s, s->url, NULL);
1505 if (c->n_videos != n_videos) {
1506 av_log(c, AV_LOG_ERROR,
1507 "new manifest has mismatched no. of video representations, %d -> %d\n",
1508 n_videos, c->n_videos);
1509 return AVERROR_INVALIDDATA;
1511 if (c->n_audios != n_audios) {
1512 av_log(c, AV_LOG_ERROR,
1513 "new manifest has mismatched no. of audio representations, %d -> %d\n",
1514 n_audios, c->n_audios);
1515 return AVERROR_INVALIDDATA;
1517 if (c->n_subtitles != n_subtitles) {
1518 av_log(c, AV_LOG_ERROR,
1519 "new manifest has mismatched no. of subtitles representations, %d -> %d\n",
1520 n_subtitles, c->n_subtitles);
1521 return AVERROR_INVALIDDATA;
1524 for (i = 0; i < n_videos; i++) {
1525 struct representation *cur_video = videos[i];
1526 struct representation *ccur_video = c->videos[i];
1527 if (cur_video->timelines) {
1528 // calc current time
1529 int64_t currentTime = get_segment_start_time_based_on_timeline(cur_video, cur_video->cur_seq_no) / cur_video->fragment_timescale;
1531 ccur_video->cur_seq_no = calc_next_seg_no_from_timelines(ccur_video, currentTime * cur_video->fragment_timescale - 1);
1532 if (ccur_video->cur_seq_no >= 0) {
1533 move_timelines(ccur_video, cur_video, c);
1536 if (cur_video->fragments) {
1537 move_segments(ccur_video, cur_video, c);
1540 for (i = 0; i < n_audios; i++) {
1541 struct representation *cur_audio = audios[i];
1542 struct representation *ccur_audio = c->audios[i];
1543 if (cur_audio->timelines) {
1544 // calc current time
1545 int64_t currentTime = get_segment_start_time_based_on_timeline(cur_audio, cur_audio->cur_seq_no) / cur_audio->fragment_timescale;
1547 ccur_audio->cur_seq_no = calc_next_seg_no_from_timelines(ccur_audio, currentTime * cur_audio->fragment_timescale - 1);
1548 if (ccur_audio->cur_seq_no >= 0) {
1549 move_timelines(ccur_audio, cur_audio, c);
1552 if (cur_audio->fragments) {
1553 move_segments(ccur_audio, cur_audio, c);
1562 c->base_url = base_url;
1565 free_subtitle_list(c);
1571 c->n_subtitles = n_subtitles;
1572 c->subtitles = subtitles;
1573 c->n_audios = n_audios;
1575 c->n_videos = n_videos;
1580 static struct fragment *get_current_fragment(struct representation *pls)
1582 int64_t min_seq_no = 0;
1583 int64_t max_seq_no = 0;
1584 struct fragment *seg = NULL;
1585 struct fragment *seg_ptr = NULL;
1586 DASHContext *c = pls->parent->priv_data;
1588 while (( !ff_check_interrupt(c->interrupt_callback)&& pls->n_fragments > 0)) {
1589 if (pls->cur_seq_no < pls->n_fragments) {
1590 seg_ptr = pls->fragments[pls->cur_seq_no];
1591 seg = av_mallocz(sizeof(struct fragment));
1595 seg->url = av_strdup(seg_ptr->url);
1600 seg->size = seg_ptr->size;
1601 seg->url_offset = seg_ptr->url_offset;
1603 } else if (c->is_live) {
1604 refresh_manifest(pls->parent);
1610 min_seq_no = calc_min_seg_no(pls->parent, pls);
1611 max_seq_no = calc_max_seg_no(pls, c);
1613 if (pls->timelines || pls->fragments) {
1614 refresh_manifest(pls->parent);
1616 if (pls->cur_seq_no <= min_seq_no) {
1617 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);
1618 pls->cur_seq_no = calc_cur_seg_no(pls->parent, pls);
1619 } else if (pls->cur_seq_no > max_seq_no) {
1620 av_log(pls->parent, AV_LOG_VERBOSE, "new fragment: min[%"PRId64"] max[%"PRId64"]\n", min_seq_no, max_seq_no);
1622 seg = av_mallocz(sizeof(struct fragment));
1626 } else if (pls->cur_seq_no <= pls->last_seq_no) {
1627 seg = av_mallocz(sizeof(struct fragment));
1633 char *tmpfilename= av_mallocz(c->max_url_size);
1637 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));
1638 seg->url = av_strireplace(pls->url_template, pls->url_template, tmpfilename);
1640 av_log(pls->parent, AV_LOG_WARNING, "Unable to resolve template url '%s', try to use origin template\n", pls->url_template);
1641 seg->url = av_strdup(pls->url_template);
1643 av_log(pls->parent, AV_LOG_ERROR, "Cannot resolve template url '%s'\n", pls->url_template);
1644 av_free(tmpfilename);
1648 av_free(tmpfilename);
1655 static int read_from_url(struct representation *pls, struct fragment *seg,
1656 uint8_t *buf, int buf_size)
1660 /* limit read if the fragment was only a part of a file */
1662 buf_size = FFMIN(buf_size, pls->cur_seg_size - pls->cur_seg_offset);
1664 ret = avio_read(pls->input, buf, buf_size);
1666 pls->cur_seg_offset += ret;
1671 static int open_input(DASHContext *c, struct representation *pls, struct fragment *seg)
1673 AVDictionary *opts = NULL;
1677 url = av_mallocz(c->max_url_size);
1679 ret = AVERROR(ENOMEM);
1683 if (seg->size >= 0) {
1684 /* try to restrict the HTTP request to the part we want
1685 * (if this is in fact a HTTP request) */
1686 av_dict_set_int(&opts, "offset", seg->url_offset, 0);
1687 av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
1690 ff_make_absolute_url(url, c->max_url_size, c->base_url, seg->url);
1691 av_log(pls->parent, AV_LOG_VERBOSE, "DASH request for url '%s', offset %"PRId64"\n",
1692 url, seg->url_offset);
1693 ret = open_url(pls->parent, &pls->input, url, &c->avio_opts, opts, NULL);
1697 av_dict_free(&opts);
1698 pls->cur_seg_offset = 0;
1699 pls->cur_seg_size = seg->size;
1703 static int update_init_section(struct representation *pls)
1705 static const int max_init_section_size = 1024 * 1024;
1706 DASHContext *c = pls->parent->priv_data;
1711 if (!pls->init_section || pls->init_sec_buf)
1714 ret = open_input(c, pls, pls->init_section);
1716 av_log(pls->parent, AV_LOG_WARNING,
1717 "Failed to open an initialization section\n");
1721 if (pls->init_section->size >= 0)
1722 sec_size = pls->init_section->size;
1723 else if ((urlsize = avio_size(pls->input)) >= 0)
1726 sec_size = max_init_section_size;
1728 av_log(pls->parent, AV_LOG_DEBUG,
1729 "Downloading an initialization section of size %"PRId64"\n",
1732 sec_size = FFMIN(sec_size, max_init_section_size);
1734 av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size);
1736 ret = read_from_url(pls, pls->init_section, pls->init_sec_buf,
1737 pls->init_sec_buf_size);
1738 ff_format_io_close(pls->parent, &pls->input);
1743 pls->init_sec_data_len = ret;
1744 pls->init_sec_buf_read_offset = 0;
1749 static int64_t seek_data(void *opaque, int64_t offset, int whence)
1751 struct representation *v = opaque;
1752 if (v->n_fragments && !v->init_sec_data_len) {
1753 return avio_seek(v->input, offset, whence);
1756 return AVERROR(ENOSYS);
1759 static int read_data(void *opaque, uint8_t *buf, int buf_size)
1762 struct representation *v = opaque;
1763 DASHContext *c = v->parent->priv_data;
1767 free_fragment(&v->cur_seg);
1768 v->cur_seg = get_current_fragment(v);
1774 /* load/update Media Initialization Section, if any */
1775 ret = update_init_section(v);
1779 ret = open_input(c, v, v->cur_seg);
1781 if (ff_check_interrupt(c->interrupt_callback)) {
1785 av_log(v->parent, AV_LOG_WARNING, "Failed to open fragment of playlist\n");
1791 if (v->init_sec_buf_read_offset < v->init_sec_data_len) {
1792 /* Push init section out first before first actual fragment */
1793 int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size);
1794 memcpy(buf, v->init_sec_buf, copy_size);
1795 v->init_sec_buf_read_offset += copy_size;
1800 /* check the v->cur_seg, if it is null, get current and double check if the new v->cur_seg*/
1802 v->cur_seg = get_current_fragment(v);
1808 ret = read_from_url(v, v->cur_seg, buf, buf_size);
1812 if (c->is_live || v->cur_seq_no < v->last_seq_no) {
1813 if (!v->is_restart_needed)
1815 v->is_restart_needed = 1;
1822 static int save_avio_options(AVFormatContext *s)
1824 DASHContext *c = s->priv_data;
1825 const char *opts[] = {
1826 "headers", "user_agent", "cookies", "http_proxy", "referer", "rw_timeout", "icy", NULL };
1827 const char **opt = opts;
1828 uint8_t *buf = NULL;
1832 if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN, &buf) >= 0) {
1833 if (buf[0] != '\0') {
1834 ret = av_dict_set(&c->avio_opts, *opt, buf, AV_DICT_DONT_STRDUP_VAL);
1847 static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url,
1848 int flags, AVDictionary **opts)
1850 av_log(s, AV_LOG_ERROR,
1851 "A DASH playlist item '%s' referred to an external file '%s'. "
1852 "Opening this file was forbidden for security reasons\n",
1854 return AVERROR(EPERM);
1857 static void close_demux_for_component(struct representation *pls)
1859 /* note: the internal buffer could have changed */
1860 av_freep(&pls->pb.buffer);
1861 memset(&pls->pb, 0x00, sizeof(AVIOContext));
1862 pls->ctx->pb = NULL;
1863 avformat_close_input(&pls->ctx);
1866 static int reopen_demux_for_component(AVFormatContext *s, struct representation *pls)
1868 DASHContext *c = s->priv_data;
1869 ff_const59 AVInputFormat *in_fmt = NULL;
1870 AVDictionary *in_fmt_opts = NULL;
1871 uint8_t *avio_ctx_buffer = NULL;
1875 close_demux_for_component(pls);
1878 if (ff_check_interrupt(&s->interrupt_callback)) {
1883 if (!(pls->ctx = avformat_alloc_context())) {
1884 ret = AVERROR(ENOMEM);
1888 avio_ctx_buffer = av_malloc(INITIAL_BUFFER_SIZE);
1889 if (!avio_ctx_buffer ) {
1890 ret = AVERROR(ENOMEM);
1891 avformat_free_context(pls->ctx);
1896 ffio_init_context(&pls->pb, avio_ctx_buffer , INITIAL_BUFFER_SIZE, 0, pls, read_data, NULL, NULL);
1898 ffio_init_context(&pls->pb, avio_ctx_buffer , INITIAL_BUFFER_SIZE, 0, pls, read_data, NULL, seek_data);
1900 pls->pb.seekable = 0;
1902 if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
1905 pls->ctx->flags = AVFMT_FLAG_CUSTOM_IO;
1906 pls->ctx->probesize = s->probesize > 0 ? s->probesize : 1024 * 4;
1907 pls->ctx->max_analyze_duration = s->max_analyze_duration > 0 ? s->max_analyze_duration : 4 * AV_TIME_BASE;
1908 pls->ctx->interrupt_callback = s->interrupt_callback;
1909 ret = av_probe_input_buffer(&pls->pb, &in_fmt, "", NULL, 0, 0);
1911 av_log(s, AV_LOG_ERROR, "Error when loading first fragment of playlist\n");
1912 avformat_free_context(pls->ctx);
1917 pls->ctx->pb = &pls->pb;
1918 pls->ctx->io_open = nested_io_open;
1920 // provide additional information from mpd if available
1921 ret = avformat_open_input(&pls->ctx, "", in_fmt, &in_fmt_opts); //pls->init_section->url
1922 av_dict_free(&in_fmt_opts);
1925 if (pls->n_fragments) {
1926 #if FF_API_R_FRAME_RATE
1927 if (pls->framerate.den) {
1928 for (i = 0; i < pls->ctx->nb_streams; i++)
1929 pls->ctx->streams[i]->r_frame_rate = pls->framerate;
1932 ret = avformat_find_stream_info(pls->ctx, NULL);
1941 static int open_demux_for_component(AVFormatContext *s, struct representation *pls)
1947 pls->cur_seq_no = calc_cur_seg_no(s, pls);
1949 if (!pls->last_seq_no) {
1950 pls->last_seq_no = calc_max_seg_no(pls, s->priv_data);
1953 ret = reopen_demux_for_component(s, pls);
1957 for (i = 0; i < pls->ctx->nb_streams; i++) {
1958 AVStream *st = avformat_new_stream(s, NULL);
1959 AVStream *ist = pls->ctx->streams[i];
1961 ret = AVERROR(ENOMEM);
1965 avcodec_parameters_copy(st->codecpar, ist->codecpar);
1966 avpriv_set_pts_info(st, ist->pts_wrap_bits, ist->time_base.num, ist->time_base.den);
1969 st->disposition = ist->disposition;
1972 for (int i = 0; i < ist->nb_side_data; i++) {
1973 const AVPacketSideData *sd_src = &ist->side_data[i];
1976 dst_data = av_stream_new_side_data(st, sd_src->type, sd_src->size);
1978 return AVERROR(ENOMEM);
1979 memcpy(dst_data, sd_src->data, sd_src->size);
1988 static int is_common_init_section_exist(struct representation **pls, int n_pls)
1990 struct fragment *first_init_section = pls[0]->init_section;
1992 int64_t url_offset = -1;
1996 if (first_init_section == NULL || n_pls == 0)
1999 url = first_init_section->url;
2000 url_offset = first_init_section->url_offset;
2001 size = pls[0]->init_section->size;
2002 for (i=0;i<n_pls;i++) {
2003 if (av_strcasecmp(pls[i]->init_section->url,url) || pls[i]->init_section->url_offset != url_offset || pls[i]->init_section->size != size) {
2010 static int copy_init_section(struct representation *rep_dest, struct representation *rep_src)
2012 rep_dest->init_sec_buf = av_mallocz(rep_src->init_sec_buf_size);
2013 if (!rep_dest->init_sec_buf) {
2014 av_log(rep_dest->ctx, AV_LOG_WARNING, "Cannot alloc memory for init_sec_buf\n");
2015 return AVERROR(ENOMEM);
2017 memcpy(rep_dest->init_sec_buf, rep_src->init_sec_buf, rep_src->init_sec_data_len);
2018 rep_dest->init_sec_buf_size = rep_src->init_sec_buf_size;
2019 rep_dest->init_sec_data_len = rep_src->init_sec_data_len;
2020 rep_dest->cur_timestamp = rep_src->cur_timestamp;
2025 static int dash_close(AVFormatContext *s);
2027 static int dash_read_header(AVFormatContext *s)
2029 DASHContext *c = s->priv_data;
2030 struct representation *rep;
2032 int stream_index = 0;
2035 c->interrupt_callback = &s->interrupt_callback;
2037 if ((ret = save_avio_options(s)) < 0)
2040 if ((ret = parse_manifest(s, s->url, s->pb)) < 0)
2043 /* If this isn't a live stream, fill the total duration of the
2046 s->duration = (int64_t) c->media_presentation_duration * AV_TIME_BASE;
2048 av_dict_set(&c->avio_opts, "seekable", "0", 0);
2052 c->is_init_section_common_video = is_common_init_section_exist(c->videos, c->n_videos);
2054 /* Open the demuxer for video and audio components if available */
2055 for (i = 0; i < c->n_videos; i++) {
2057 if (i > 0 && c->is_init_section_common_video) {
2058 ret = copy_init_section(rep, c->videos[0]);
2062 ret = open_demux_for_component(s, rep);
2066 rep->stream_index = stream_index;
2071 c->is_init_section_common_audio = is_common_init_section_exist(c->audios, c->n_audios);
2073 for (i = 0; i < c->n_audios; i++) {
2075 if (i > 0 && c->is_init_section_common_audio) {
2076 ret = copy_init_section(rep, c->audios[0]);
2080 ret = open_demux_for_component(s, rep);
2084 rep->stream_index = stream_index;
2089 c->is_init_section_common_audio = is_common_init_section_exist(c->subtitles, c->n_subtitles);
2091 for (i = 0; i < c->n_subtitles; i++) {
2092 rep = c->subtitles[i];
2093 if (i > 0 && c->is_init_section_common_audio) {
2094 ret = copy_init_section(rep, c->subtitles[0]);
2098 ret = open_demux_for_component(s, rep);
2102 rep->stream_index = stream_index;
2106 if (!stream_index) {
2107 ret = AVERROR_INVALIDDATA;
2111 /* Create a program */
2114 program = av_new_program(s, 0);
2116 ret = AVERROR(ENOMEM);
2120 for (i = 0; i < c->n_videos; i++) {
2122 av_program_add_stream_index(s, 0, rep->stream_index);
2123 rep->assoc_stream = s->streams[rep->stream_index];
2124 if (rep->bandwidth > 0)
2125 av_dict_set_int(&rep->assoc_stream->metadata, "variant_bitrate", rep->bandwidth, 0);
2127 av_dict_set(&rep->assoc_stream->metadata, "id", rep->id, 0);
2129 for (i = 0; i < c->n_audios; i++) {
2131 av_program_add_stream_index(s, 0, rep->stream_index);
2132 rep->assoc_stream = s->streams[rep->stream_index];
2133 if (rep->bandwidth > 0)
2134 av_dict_set_int(&rep->assoc_stream->metadata, "variant_bitrate", rep->bandwidth, 0);
2136 av_dict_set(&rep->assoc_stream->metadata, "id", rep->id, 0);
2138 av_dict_set(&rep->assoc_stream->metadata, "language", rep->lang, 0);
2139 av_freep(&rep->lang);
2142 for (i = 0; i < c->n_subtitles; i++) {
2143 rep = c->subtitles[i];
2144 av_program_add_stream_index(s, 0, rep->stream_index);
2145 rep->assoc_stream = s->streams[rep->stream_index];
2147 av_dict_set(&rep->assoc_stream->metadata, "id", rep->id, 0);
2149 av_dict_set(&rep->assoc_stream->metadata, "language", rep->lang, 0);
2150 av_freep(&rep->lang);
2161 static void recheck_discard_flags(AVFormatContext *s, struct representation **p, int n)
2165 for (i = 0; i < n; i++) {
2166 struct representation *pls = p[i];
2167 int needed = !pls->assoc_stream || pls->assoc_stream->discard < AVDISCARD_ALL;
2169 if (needed && !pls->ctx) {
2170 pls->cur_seg_offset = 0;
2171 pls->init_sec_buf_read_offset = 0;
2173 for (j = 0; j < n; j++) {
2174 pls->cur_seq_no = FFMAX(pls->cur_seq_no, p[j]->cur_seq_no);
2176 reopen_demux_for_component(s, pls);
2177 av_log(s, AV_LOG_INFO, "Now receiving stream_index %d\n", pls->stream_index);
2178 } else if (!needed && pls->ctx) {
2179 close_demux_for_component(pls);
2180 ff_format_io_close(pls->parent, &pls->input);
2181 av_log(s, AV_LOG_INFO, "No longer receiving stream_index %d\n", pls->stream_index);
2186 static int dash_read_packet(AVFormatContext *s, AVPacket *pkt)
2188 DASHContext *c = s->priv_data;
2191 struct representation *cur = NULL;
2192 struct representation *rep = NULL;
2194 recheck_discard_flags(s, c->videos, c->n_videos);
2195 recheck_discard_flags(s, c->audios, c->n_audios);
2196 recheck_discard_flags(s, c->subtitles, c->n_subtitles);
2198 for (i = 0; i < c->n_videos; i++) {
2202 if (!cur || rep->cur_timestamp < mints) {
2204 mints = rep->cur_timestamp;
2207 for (i = 0; i < c->n_audios; i++) {
2211 if (!cur || rep->cur_timestamp < mints) {
2213 mints = rep->cur_timestamp;
2217 for (i = 0; i < c->n_subtitles; i++) {
2218 rep = c->subtitles[i];
2221 if (!cur || rep->cur_timestamp < mints) {
2223 mints = rep->cur_timestamp;
2228 return AVERROR_INVALIDDATA;
2230 while (!ff_check_interrupt(c->interrupt_callback) && !ret) {
2231 ret = av_read_frame(cur->ctx, pkt);
2233 /* If we got a packet, return it */
2234 cur->cur_timestamp = av_rescale(pkt->pts, (int64_t)cur->ctx->streams[0]->time_base.num * 90000, cur->ctx->streams[0]->time_base.den);
2235 pkt->stream_index = cur->stream_index;
2238 if (cur->is_restart_needed) {
2239 cur->cur_seg_offset = 0;
2240 cur->init_sec_buf_read_offset = 0;
2241 ff_format_io_close(cur->parent, &cur->input);
2242 ret = reopen_demux_for_component(s, cur);
2243 cur->is_restart_needed = 0;
2249 static int dash_close(AVFormatContext *s)
2251 DASHContext *c = s->priv_data;
2254 free_subtitle_list(c);
2255 av_dict_free(&c->avio_opts);
2256 av_freep(&c->base_url);
2260 static int dash_seek(AVFormatContext *s, struct representation *pls, int64_t seek_pos_msec, int flags, int dry_run)
2265 int64_t duration = 0;
2267 av_log(pls->parent, AV_LOG_VERBOSE, "DASH seek pos[%"PRId64"ms] %s\n",
2268 seek_pos_msec, dry_run ? " (dry)" : "");
2270 // single fragment mode
2271 if (pls->n_fragments == 1) {
2272 pls->cur_timestamp = 0;
2273 pls->cur_seg_offset = 0;
2276 ff_read_frame_flush(pls->ctx);
2277 return av_seek_frame(pls->ctx, -1, seek_pos_msec * 1000, flags);
2280 ff_format_io_close(pls->parent, &pls->input);
2282 // find the nearest fragment
2283 if (pls->n_timelines > 0 && pls->fragment_timescale > 0) {
2284 int64_t num = pls->first_seq_no;
2285 av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with SegmentTimeline start n_timelines[%d] "
2286 "last_seq_no[%"PRId64"].\n",
2287 (int)pls->n_timelines, (int64_t)pls->last_seq_no);
2288 for (i = 0; i < pls->n_timelines; i++) {
2289 if (pls->timelines[i]->starttime > 0) {
2290 duration = pls->timelines[i]->starttime;
2292 duration += pls->timelines[i]->duration;
2293 if (seek_pos_msec < ((duration * 1000) / pls->fragment_timescale)) {
2296 for (j = 0; j < pls->timelines[i]->repeat; j++) {
2297 duration += pls->timelines[i]->duration;
2299 if (seek_pos_msec < ((duration * 1000) / pls->fragment_timescale)) {
2307 pls->cur_seq_no = num > pls->last_seq_no ? pls->last_seq_no : num;
2308 av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with SegmentTimeline end cur_seq_no[%"PRId64"].\n",
2309 (int64_t)pls->cur_seq_no);
2310 } else if (pls->fragment_duration > 0) {
2311 pls->cur_seq_no = pls->first_seq_no + ((seek_pos_msec * pls->fragment_timescale) / pls->fragment_duration) / 1000;
2313 av_log(pls->parent, AV_LOG_ERROR, "dash_seek missing timeline or fragment_duration\n");
2314 pls->cur_seq_no = pls->first_seq_no;
2316 pls->cur_timestamp = 0;
2317 pls->cur_seg_offset = 0;
2318 pls->init_sec_buf_read_offset = 0;
2319 ret = dry_run ? 0 : reopen_demux_for_component(s, pls);
2324 static int dash_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
2327 DASHContext *c = s->priv_data;
2328 int64_t seek_pos_msec = av_rescale_rnd(timestamp, 1000,
2329 s->streams[stream_index]->time_base.den,
2330 flags & AVSEEK_FLAG_BACKWARD ?
2331 AV_ROUND_DOWN : AV_ROUND_UP);
2332 if ((flags & AVSEEK_FLAG_BYTE) || c->is_live)
2333 return AVERROR(ENOSYS);
2335 /* Seek in discarded streams with dry_run=1 to avoid reopening them */
2336 for (i = 0; i < c->n_videos; i++) {
2338 ret = dash_seek(s, c->videos[i], seek_pos_msec, flags, !c->videos[i]->ctx);
2340 for (i = 0; i < c->n_audios; i++) {
2342 ret = dash_seek(s, c->audios[i], seek_pos_msec, flags, !c->audios[i]->ctx);
2344 for (i = 0; i < c->n_subtitles; i++) {
2346 ret = dash_seek(s, c->subtitles[i], seek_pos_msec, flags, !c->subtitles[i]->ctx);
2352 static int dash_probe(const AVProbeData *p)
2354 if (!av_stristr(p->buf, "<MPD"))
2357 if (av_stristr(p->buf, "dash:profile:isoff-on-demand:2011") ||
2358 av_stristr(p->buf, "dash:profile:isoff-live:2011") ||
2359 av_stristr(p->buf, "dash:profile:isoff-live:2012") ||
2360 av_stristr(p->buf, "dash:profile:isoff-main:2011") ||
2361 av_stristr(p->buf, "3GPP:PSS:profile:DASH1")) {
2362 return AVPROBE_SCORE_MAX;
2364 if (av_stristr(p->buf, "dash:profile")) {
2365 return AVPROBE_SCORE_MAX;
2371 #define OFFSET(x) offsetof(DASHContext, x)
2372 #define FLAGS AV_OPT_FLAG_DECODING_PARAM
2373 static const AVOption dash_options[] = {
2374 {"allowed_extensions", "List of file extensions that dash is allowed to access",
2375 OFFSET(allowed_extensions), AV_OPT_TYPE_STRING,
2376 {.str = "aac,m4a,m4s,m4v,mov,mp4,webm,ts"},
2377 INT_MIN, INT_MAX, FLAGS},
2381 static const AVClass dash_class = {
2382 .class_name = "dash",
2383 .item_name = av_default_item_name,
2384 .option = dash_options,
2385 .version = LIBAVUTIL_VERSION_INT,
2388 AVInputFormat ff_dash_demuxer = {
2390 .long_name = NULL_IF_CONFIG_SMALL("Dynamic Adaptive Streaming over HTTP"),
2391 .priv_class = &dash_class,
2392 .priv_data_size = sizeof(DASHContext),
2393 .read_probe = dash_probe,
2394 .read_header = dash_read_header,
2395 .read_packet = dash_read_packet,
2396 .read_close = dash_close,
2397 .read_seek = dash_read_seek,
2398 .flags = AVFMT_NO_BYTE_SEEK,