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
40 * reference to : ISO_IEC_23009-1-DASH-2012
42 * Table: Table 17 — Semantics of SegmentTimeline element
45 /* starttime: Element or Attribute Name
46 * specifies the MPD start time, in @timescale units,
47 * the first Segment in the series starts relative to the beginning of the Period.
48 * The value of this attribute must be equal to or greater than the sum of the previous S
49 * element earliest presentation time and the sum of the contiguous Segment durations.
50 * If the value of the attribute is greater than what is expressed by the previous S element,
51 * it expresses discontinuities in the timeline.
52 * If not present then the value shall be assumed to be zero for the first S element
53 * and for the subsequent S elements, the value shall be assumed to be the sum of
54 * the previous S element's earliest presentation time and contiguous duration
55 * (i.e. previous S@starttime + @duration * (@repeat + 1)).
58 /* repeat: Element or Attribute Name
59 * specifies the repeat count of the number of following contiguous Segments with
60 * the same duration expressed by the value of @duration. This value is zero-based
61 * (e.g. a value of three means four Segments in the contiguous series).
64 /* duration: Element or Attribute Name
65 * specifies the Segment duration, in units of the value of the @timescale.
71 * Each playlist has its own demuxer. If it is currently active,
72 * it has an opened AVIOContext too, and potentially an AVPacket
73 * containing the next packet from this stream.
75 struct representation {
79 AVFormatContext *parent;
86 enum AVMediaType type;
91 AVStream *assoc_stream; /* demuxer stream associated with this representation */
94 struct fragment **fragments; /* VOD list of fragment for profile */
97 struct timeline **timelines;
101 int64_t start_number; /* used in case when we have dynamic list of segment to know which segments are new one*/
103 int64_t fragment_duration;
104 int64_t fragment_timescale;
106 int64_t presentation_timeoffset;
109 int64_t cur_seg_offset;
110 int64_t cur_seg_size;
111 struct fragment *cur_seg;
113 /* Currently active Media Initialization Section */
114 struct fragment *init_section;
115 uint8_t *init_sec_buf;
116 uint32_t init_sec_buf_size;
117 uint32_t init_sec_data_len;
118 uint32_t init_sec_buf_read_offset;
119 int64_t cur_timestamp;
120 int is_restart_needed;
123 typedef struct DASHContext {
124 const AVClass *class;
128 struct representation **videos;
130 struct representation **audios;
132 struct representation **subtitles;
134 /* MediaPresentationDescription Attribute */
135 uint64_t media_presentation_duration;
136 uint64_t suggested_presentation_delay;
137 uint64_t availability_start_time;
138 uint64_t availability_end_time;
139 uint64_t publish_time;
140 uint64_t minimum_update_period;
141 uint64_t time_shift_buffer_depth;
142 uint64_t min_buffer_time;
144 /* Period Attribute */
145 uint64_t period_duration;
146 uint64_t period_start;
148 /* AdaptationSet Attribute */
149 char *adaptionset_lang;
152 AVIOInterruptCB *interrupt_callback;
153 char *allowed_extensions;
154 AVDictionary *avio_opts;
157 /* Flags for init section*/
158 int is_init_section_common_video;
159 int is_init_section_common_audio;
163 static int ishttp(char *url)
165 const char *proto_name = avio_find_protocol_name(url);
166 return av_strstart(proto_name, "http", NULL);
169 static int aligned(int val)
171 return ((val + 0x3F) >> 6) << 6;
174 static uint64_t get_current_time_in_sec(void)
176 return av_gettime() / 1000000;
179 static uint64_t get_utc_date_time_insec(AVFormatContext *s, const char *datetime)
190 /* ISO-8601 date parser */
194 ret = sscanf(datetime, "%d-%d-%dT%d:%d:%fZ", &year, &month, &day, &hour, &minute, &second);
195 /* year, month, day, hour, minute, second 6 arguments */
197 av_log(s, AV_LOG_WARNING, "get_utc_date_time_insec get a wrong time format\n");
199 timeinfo.tm_year = year - 1900;
200 timeinfo.tm_mon = month - 1;
201 timeinfo.tm_mday = day;
202 timeinfo.tm_hour = hour;
203 timeinfo.tm_min = minute;
204 timeinfo.tm_sec = (int)second;
206 return av_timegm(&timeinfo);
209 static uint32_t get_duration_insec(AVFormatContext *s, const char *duration)
211 /* ISO-8601 duration parser */
219 const char *ptr = duration;
222 if (*ptr == 'P' || *ptr == 'T') {
227 if (sscanf(ptr, "%f%c%n", &value, &type, &size) != 2) {
228 av_log(s, AV_LOG_WARNING, "get_duration_insec get a wrong time format\n");
229 return 0; /* parser error */
233 days = (uint32_t)value;
236 hours = (uint32_t)value;
239 mins = (uint32_t)value;
242 secs = (uint32_t)value;
245 // handle invalid type
250 return ((days * 24 + hours) * 60 + mins) * 60 + secs;
253 static int64_t get_segment_start_time_based_on_timeline(struct representation *pls, int64_t cur_seq_no)
255 int64_t start_time = 0;
260 if (pls->n_timelines) {
261 for (i = 0; i < pls->n_timelines; i++) {
262 if (pls->timelines[i]->starttime > 0) {
263 start_time = pls->timelines[i]->starttime;
265 if (num == cur_seq_no)
268 start_time += pls->timelines[i]->duration;
270 if (pls->timelines[i]->repeat == -1) {
271 start_time = pls->timelines[i]->duration * cur_seq_no;
275 for (j = 0; j < pls->timelines[i]->repeat; j++) {
277 if (num == cur_seq_no)
279 start_time += pls->timelines[i]->duration;
288 static int64_t calc_next_seg_no_from_timelines(struct representation *pls, int64_t cur_time)
293 int64_t start_time = 0;
295 for (i = 0; i < pls->n_timelines; i++) {
296 if (pls->timelines[i]->starttime > 0) {
297 start_time = pls->timelines[i]->starttime;
299 if (start_time > cur_time)
302 start_time += pls->timelines[i]->duration;
303 for (j = 0; j < pls->timelines[i]->repeat; j++) {
305 if (start_time > cur_time)
307 start_time += pls->timelines[i]->duration;
318 static void free_fragment(struct fragment **seg)
323 av_freep(&(*seg)->url);
327 static void free_fragment_list(struct representation *pls)
331 for (i = 0; i < pls->n_fragments; i++) {
332 free_fragment(&pls->fragments[i]);
334 av_freep(&pls->fragments);
335 pls->n_fragments = 0;
338 static void free_timelines_list(struct representation *pls)
342 for (i = 0; i < pls->n_timelines; i++) {
343 av_freep(&pls->timelines[i]);
345 av_freep(&pls->timelines);
346 pls->n_timelines = 0;
349 static void free_representation(struct representation *pls)
351 free_fragment_list(pls);
352 free_timelines_list(pls);
353 free_fragment(&pls->cur_seg);
354 free_fragment(&pls->init_section);
355 av_freep(&pls->init_sec_buf);
356 av_freep(&pls->pb.buffer);
357 ff_format_io_close(pls->parent, &pls->input);
360 avformat_close_input(&pls->ctx);
363 av_freep(&pls->url_template);
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 av_dict_copy(&tmp, opts, 0);
409 av_dict_copy(&tmp, opts2, 0);
411 if (av_strstart(url, "crypto", NULL)) {
412 if (url[6] == '+' || url[6] == ':')
413 proto_name = avio_find_protocol_name(url + 7);
417 proto_name = avio_find_protocol_name(url);
420 return AVERROR_INVALIDDATA;
422 // only http(s) & file are allowed
423 if (av_strstart(proto_name, "file", NULL)) {
424 if (strcmp(c->allowed_extensions, "ALL") && !av_match_ext(url, c->allowed_extensions)) {
425 av_log(s, AV_LOG_ERROR,
426 "Filename extension of \'%s\' is not a common multimedia extension, blocked for security reasons.\n"
427 "If you wish to override this adjust allowed_extensions, you can set it to \'ALL\' to allow all\n",
429 return AVERROR_INVALIDDATA;
431 } else if (av_strstart(proto_name, "http", NULL)) {
434 return AVERROR_INVALIDDATA;
436 if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':')
438 else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':')
440 else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))
441 return AVERROR_INVALIDDATA;
444 ret = avio_open2(pb, url, AVIO_FLAG_READ, c->interrupt_callback, &tmp);
446 // update cookies on http response with setcookies.
447 char *new_cookies = NULL;
449 if (!(s->flags & AVFMT_FLAG_CUSTOM_IO))
450 av_opt_get(*pb, "cookies", AV_OPT_SEARCH_CHILDREN, (uint8_t**)&new_cookies);
453 av_dict_set(&opts, "cookies", new_cookies, AV_DICT_DONT_STRDUP_VAL);
461 *is_http = av_strstart(proto_name, "http", NULL);
466 static char *get_content_url(xmlNodePtr *baseurl_nodes,
470 char *rep_bandwidth_val,
476 char *tmp_str = av_mallocz(max_url_size);
477 char *tmp_str_2 = av_mallocz(max_url_size);
479 if (!tmp_str || !tmp_str_2) {
483 for (i = 0; i < n_baseurl_nodes; ++i) {
484 if (baseurl_nodes[i] &&
485 baseurl_nodes[i]->children &&
486 baseurl_nodes[i]->children->type == XML_TEXT_NODE) {
487 text = xmlNodeGetContent(baseurl_nodes[i]->children);
489 memset(tmp_str, 0, max_url_size);
490 memset(tmp_str_2, 0, max_url_size);
491 ff_make_absolute_url(tmp_str_2, max_url_size, tmp_str, text);
492 av_strlcpy(tmp_str, tmp_str_2, max_url_size);
499 ff_make_absolute_url(tmp_str, max_url_size, tmp_str, val);
502 url = av_strireplace(tmp_str, "$RepresentationID$", (const char*)rep_id_val);
506 av_strlcpy(tmp_str, url, max_url_size);
508 if (rep_bandwidth_val && tmp_str[0] != '\0') {
509 // free any previously assigned url before reassigning
511 url = av_strireplace(tmp_str, "$Bandwidth$", (const char*)rep_bandwidth_val);
522 static char *get_val_from_nodes_tab(xmlNodePtr *nodes, const int n_nodes, const char *attrname)
527 for (i = 0; i < n_nodes; ++i) {
529 val = xmlGetProp(nodes[i], attrname);
538 static xmlNodePtr find_child_node_by_name(xmlNodePtr rootnode, const char *nodename)
540 xmlNodePtr node = rootnode;
545 node = xmlFirstElementChild(node);
547 if (!av_strcasecmp(node->name, nodename)) {
550 node = xmlNextElementSibling(node);
555 static enum AVMediaType get_content_type(xmlNodePtr node)
557 enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
563 for (i = 0; i < 2; i++) {
564 attr = i ? "mimeType" : "contentType";
565 val = xmlGetProp(node, attr);
567 if (av_stristr((const char *)val, "video")) {
568 type = AVMEDIA_TYPE_VIDEO;
569 } else if (av_stristr((const char *)val, "audio")) {
570 type = AVMEDIA_TYPE_AUDIO;
571 } else if (av_stristr((const char *)val, "text")) {
572 type = AVMEDIA_TYPE_SUBTITLE;
581 static struct fragment * get_Fragment(char *range)
583 struct fragment * seg = av_mallocz(sizeof(struct fragment));
590 char *str_end_offset;
591 char *str_offset = av_strtok(range, "-", &str_end_offset);
592 seg->url_offset = strtoll(str_offset, NULL, 10);
593 seg->size = strtoll(str_end_offset, NULL, 10) - seg->url_offset;
599 static int parse_manifest_segmenturlnode(AVFormatContext *s, struct representation *rep,
600 xmlNodePtr fragmenturl_node,
601 xmlNodePtr *baseurl_nodes,
603 char *rep_bandwidth_val)
605 DASHContext *c = s->priv_data;
606 char *initialization_val = NULL;
607 char *media_val = NULL;
608 char *range_val = NULL;
609 int max_url_size = c ? c->max_url_size: MAX_URL_SIZE;
611 if (!av_strcasecmp(fragmenturl_node->name, (const char *)"Initialization")) {
612 initialization_val = xmlGetProp(fragmenturl_node, "sourceURL");
613 range_val = xmlGetProp(fragmenturl_node, "range");
614 if (initialization_val || range_val) {
615 rep->init_section = get_Fragment(range_val);
616 if (!rep->init_section) {
617 xmlFree(initialization_val);
619 return AVERROR(ENOMEM);
621 rep->init_section->url = get_content_url(baseurl_nodes, 4,
627 if (!rep->init_section->url) {
628 av_free(rep->init_section);
629 xmlFree(initialization_val);
631 return AVERROR(ENOMEM);
633 xmlFree(initialization_val);
636 } else if (!av_strcasecmp(fragmenturl_node->name, (const char *)"SegmentURL")) {
637 media_val = xmlGetProp(fragmenturl_node, "media");
638 range_val = xmlGetProp(fragmenturl_node, "mediaRange");
639 if (media_val || range_val) {
640 struct fragment *seg = get_Fragment(range_val);
644 return AVERROR(ENOMEM);
646 seg->url = get_content_url(baseurl_nodes, 4,
655 return AVERROR(ENOMEM);
657 dynarray_add(&rep->fragments, &rep->n_fragments, seg);
666 static int parse_manifest_segmenttimeline(AVFormatContext *s, struct representation *rep,
667 xmlNodePtr fragment_timeline_node)
669 xmlAttrPtr attr = NULL;
672 if (!av_strcasecmp(fragment_timeline_node->name, (const char *)"S")) {
673 struct timeline *tml = av_mallocz(sizeof(struct timeline));
675 return AVERROR(ENOMEM);
677 attr = fragment_timeline_node->properties;
679 val = xmlGetProp(fragment_timeline_node, attr->name);
682 av_log(s, AV_LOG_WARNING, "parse_manifest_segmenttimeline attr->name = %s val is NULL\n", attr->name);
686 if (!av_strcasecmp(attr->name, (const char *)"t")) {
687 tml->starttime = (int64_t)strtoll(val, NULL, 10);
688 } else if (!av_strcasecmp(attr->name, (const char *)"r")) {
689 tml->repeat =(int64_t) strtoll(val, NULL, 10);
690 } else if (!av_strcasecmp(attr->name, (const char *)"d")) {
691 tml->duration = (int64_t)strtoll(val, NULL, 10);
696 dynarray_add(&rep->timelines, &rep->n_timelines, tml);
702 static int resolve_content_path(AVFormatContext *s, const char *url, int *max_url_size, xmlNodePtr *baseurl_nodes, int n_baseurl_nodes)
704 char *tmp_str = NULL;
706 char *mpdName = NULL;
707 xmlNodePtr node = NULL;
708 char *baseurl = NULL;
709 char *root_url = NULL;
719 int tmp_max_url_size = strlen(url);
721 for (i = n_baseurl_nodes-1; i >= 0 ; i--) {
722 text = xmlNodeGetContent(baseurl_nodes[i]);
725 tmp_max_url_size += strlen(text);
733 tmp_max_url_size = aligned(tmp_max_url_size);
734 text = av_mallocz(tmp_max_url_size);
736 updated = AVERROR(ENOMEM);
739 av_strlcpy(text, url, strlen(url)+1);
741 while (mpdName = av_strtok(tmp, "/", &tmp)) {
742 size = strlen(mpdName);
746 path = av_mallocz(tmp_max_url_size);
747 tmp_str = av_mallocz(tmp_max_url_size);
748 if (!tmp_str || !path) {
749 updated = AVERROR(ENOMEM);
753 av_strlcpy (path, url, strlen(url) - size + 1);
754 for (rootId = n_baseurl_nodes - 1; rootId > 0; rootId --) {
755 if (!(node = baseurl_nodes[rootId])) {
758 text = xmlNodeGetContent(node);
766 node = baseurl_nodes[rootId];
767 baseurl = xmlNodeGetContent(node);
768 root_url = (av_strcasecmp(baseurl, "")) ? baseurl : path;
770 xmlNodeSetContent(node, root_url);
774 size = strlen(root_url);
775 isRootHttp = ishttp(root_url);
777 if (root_url[size - 1] != token) {
778 av_strlcat(root_url, "/", size + 2);
782 for (i = 0; i < n_baseurl_nodes; ++i) {
786 text = xmlNodeGetContent(baseurl_nodes[i]);
787 if (text && !av_strstart(text, "/", NULL)) {
788 memset(tmp_str, 0, strlen(tmp_str));
789 if (!ishttp(text) && isRootHttp) {
790 av_strlcpy(tmp_str, root_url, size + 1);
792 start = (text[0] == token);
793 if (start && av_stristr(tmp_str, text)) {
795 if (!av_strncasecmp(tmp_str, "http://", 7)) {
797 } else if (!av_strncasecmp(tmp_str, "https://", 8)) {
801 memset(p + 1, 0, strlen(p));
803 av_strlcat(tmp_str, text + start, tmp_max_url_size);
804 xmlNodeSetContent(baseurl_nodes[i], tmp_str);
811 if (tmp_max_url_size > *max_url_size) {
812 *max_url_size = tmp_max_url_size;
821 static int parse_manifest_representation(AVFormatContext *s, const char *url,
823 xmlNodePtr adaptionset_node,
824 xmlNodePtr mpd_baseurl_node,
825 xmlNodePtr period_baseurl_node,
826 xmlNodePtr period_segmenttemplate_node,
827 xmlNodePtr period_segmentlist_node,
828 xmlNodePtr fragment_template_node,
829 xmlNodePtr content_component_node,
830 xmlNodePtr adaptionset_baseurl_node,
831 xmlNodePtr adaptionset_segmentlist_node,
832 xmlNodePtr adaptionset_supplementalproperty_node)
835 int32_t subtitle_rep_idx = 0;
836 int32_t audio_rep_idx = 0;
837 int32_t video_rep_idx = 0;
838 DASHContext *c = s->priv_data;
839 struct representation *rep = NULL;
840 struct fragment *seg = NULL;
841 xmlNodePtr representation_segmenttemplate_node = NULL;
842 xmlNodePtr representation_baseurl_node = NULL;
843 xmlNodePtr representation_segmentlist_node = NULL;
844 xmlNodePtr segmentlists_tab[3];
845 xmlNodePtr fragment_timeline_node = NULL;
846 xmlNodePtr fragment_templates_tab[5];
847 char *duration_val = NULL;
848 char *presentation_timeoffset_val = NULL;
849 char *startnumber_val = NULL;
850 char *timescale_val = NULL;
851 char *initialization_val = NULL;
852 char *media_val = NULL;
854 xmlNodePtr baseurl_nodes[4];
855 xmlNodePtr representation_node = node;
856 char *rep_id_val = xmlGetProp(representation_node, "id");
857 char *rep_bandwidth_val = xmlGetProp(representation_node, "bandwidth");
858 char *rep_framerate_val = xmlGetProp(representation_node, "frameRate");
859 enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
861 // try get information from representation
862 if (type == AVMEDIA_TYPE_UNKNOWN)
863 type = get_content_type(representation_node);
864 // try get information from contentComponen
865 if (type == AVMEDIA_TYPE_UNKNOWN)
866 type = get_content_type(content_component_node);
867 // try get information from adaption set
868 if (type == AVMEDIA_TYPE_UNKNOWN)
869 type = get_content_type(adaptionset_node);
870 if (type == AVMEDIA_TYPE_UNKNOWN) {
871 av_log(s, AV_LOG_VERBOSE, "Parsing '%s' - skipp not supported representation type\n", url);
872 } else if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO || type == AVMEDIA_TYPE_SUBTITLE) {
873 // convert selected representation to our internal struct
874 rep = av_mallocz(sizeof(struct representation));
876 ret = AVERROR(ENOMEM);
879 if (c->adaptionset_lang) {
880 rep->lang = av_strdup(c->adaptionset_lang);
882 av_log(s, AV_LOG_ERROR, "alloc language memory failure\n");
884 ret = AVERROR(ENOMEM);
889 representation_segmenttemplate_node = find_child_node_by_name(representation_node, "SegmentTemplate");
890 representation_baseurl_node = find_child_node_by_name(representation_node, "BaseURL");
891 representation_segmentlist_node = find_child_node_by_name(representation_node, "SegmentList");
893 baseurl_nodes[0] = mpd_baseurl_node;
894 baseurl_nodes[1] = period_baseurl_node;
895 baseurl_nodes[2] = adaptionset_baseurl_node;
896 baseurl_nodes[3] = representation_baseurl_node;
898 ret = resolve_content_path(s, url, &c->max_url_size, baseurl_nodes, 4);
899 c->max_url_size = aligned(c->max_url_size
900 + (rep_id_val ? strlen(rep_id_val) : 0)
901 + (rep_bandwidth_val ? strlen(rep_bandwidth_val) : 0));
902 if (ret == AVERROR(ENOMEM) || ret == 0) {
905 if (representation_segmenttemplate_node || fragment_template_node || period_segmenttemplate_node) {
906 fragment_timeline_node = NULL;
907 fragment_templates_tab[0] = representation_segmenttemplate_node;
908 fragment_templates_tab[1] = adaptionset_segmentlist_node;
909 fragment_templates_tab[2] = fragment_template_node;
910 fragment_templates_tab[3] = period_segmenttemplate_node;
911 fragment_templates_tab[4] = period_segmentlist_node;
913 presentation_timeoffset_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "presentationTimeOffset");
914 duration_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "duration");
915 startnumber_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "startNumber");
916 timescale_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "timescale");
917 initialization_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "initialization");
918 media_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "media");
920 if (initialization_val) {
921 rep->init_section = av_mallocz(sizeof(struct fragment));
922 if (!rep->init_section) {
924 ret = AVERROR(ENOMEM);
927 c->max_url_size = aligned(c->max_url_size + strlen(initialization_val));
928 rep->init_section->url = get_content_url(baseurl_nodes, 4, c->max_url_size, rep_id_val, rep_bandwidth_val, initialization_val);
929 if (!rep->init_section->url) {
930 av_free(rep->init_section);
932 ret = AVERROR(ENOMEM);
935 rep->init_section->size = -1;
936 xmlFree(initialization_val);
940 c->max_url_size = aligned(c->max_url_size + strlen(media_val));
941 rep->url_template = get_content_url(baseurl_nodes, 4, c->max_url_size, rep_id_val, rep_bandwidth_val, media_val);
945 if (presentation_timeoffset_val) {
946 rep->presentation_timeoffset = (int64_t) strtoll(presentation_timeoffset_val, NULL, 10);
947 av_log(s, AV_LOG_TRACE, "rep->presentation_timeoffset = [%"PRId64"]\n", rep->presentation_timeoffset);
948 xmlFree(presentation_timeoffset_val);
951 rep->fragment_duration = (int64_t) strtoll(duration_val, NULL, 10);
952 av_log(s, AV_LOG_TRACE, "rep->fragment_duration = [%"PRId64"]\n", rep->fragment_duration);
953 xmlFree(duration_val);
956 rep->fragment_timescale = (int64_t) strtoll(timescale_val, NULL, 10);
957 av_log(s, AV_LOG_TRACE, "rep->fragment_timescale = [%"PRId64"]\n", rep->fragment_timescale);
958 xmlFree(timescale_val);
960 if (startnumber_val) {
961 rep->start_number = rep->first_seq_no = (int64_t) strtoll(startnumber_val, NULL, 10);
962 av_log(s, AV_LOG_TRACE, "rep->first_seq_no = [%"PRId64"]\n", rep->first_seq_no);
963 xmlFree(startnumber_val);
965 if (adaptionset_supplementalproperty_node) {
966 if (!av_strcasecmp(xmlGetProp(adaptionset_supplementalproperty_node,"schemeIdUri"), "http://dashif.org/guidelines/last-segment-number")) {
967 val = xmlGetProp(adaptionset_supplementalproperty_node,"value");
969 av_log(s, AV_LOG_ERROR, "Missing value attribute in adaptionset_supplementalproperty_node\n");
971 rep->last_seq_no =(int64_t) strtoll(val, NULL, 10) - 1;
977 fragment_timeline_node = find_child_node_by_name(representation_segmenttemplate_node, "SegmentTimeline");
979 if (!fragment_timeline_node)
980 fragment_timeline_node = find_child_node_by_name(fragment_template_node, "SegmentTimeline");
981 if (!fragment_timeline_node)
982 fragment_timeline_node = find_child_node_by_name(adaptionset_segmentlist_node, "SegmentTimeline");
983 if (!fragment_timeline_node)
984 fragment_timeline_node = find_child_node_by_name(period_segmentlist_node, "SegmentTimeline");
985 if (fragment_timeline_node) {
986 fragment_timeline_node = xmlFirstElementChild(fragment_timeline_node);
987 while (fragment_timeline_node) {
988 ret = parse_manifest_segmenttimeline(s, rep, fragment_timeline_node);
992 fragment_timeline_node = xmlNextElementSibling(fragment_timeline_node);
995 } else if (representation_baseurl_node && !representation_segmentlist_node) {
996 seg = av_mallocz(sizeof(struct fragment));
998 ret = AVERROR(ENOMEM);
1001 seg->url = get_content_url(baseurl_nodes, 4, c->max_url_size, rep_id_val, rep_bandwidth_val, NULL);
1004 ret = AVERROR(ENOMEM);
1008 dynarray_add(&rep->fragments, &rep->n_fragments, seg);
1009 } else if (representation_segmentlist_node) {
1010 // TODO: https://www.brendanlong.com/the-structure-of-an-mpeg-dash-mpd.html
1011 // http://www-itec.uni-klu.ac.at/dash/ddash/mpdGenerator.php?fragmentlength=15&type=full
1012 xmlNodePtr fragmenturl_node = NULL;
1013 segmentlists_tab[0] = representation_segmentlist_node;
1014 segmentlists_tab[1] = adaptionset_segmentlist_node;
1015 segmentlists_tab[2] = period_segmentlist_node;
1017 duration_val = get_val_from_nodes_tab(segmentlists_tab, 3, "duration");
1018 timescale_val = get_val_from_nodes_tab(segmentlists_tab, 3, "timescale");
1019 startnumber_val = get_val_from_nodes_tab(segmentlists_tab, 3, "startNumber");
1021 rep->fragment_duration = (int64_t) strtoll(duration_val, NULL, 10);
1022 av_log(s, AV_LOG_TRACE, "rep->fragment_duration = [%"PRId64"]\n", rep->fragment_duration);
1023 xmlFree(duration_val);
1025 if (timescale_val) {
1026 rep->fragment_timescale = (int64_t) strtoll(timescale_val, NULL, 10);
1027 av_log(s, AV_LOG_TRACE, "rep->fragment_timescale = [%"PRId64"]\n", rep->fragment_timescale);
1028 xmlFree(timescale_val);
1030 if (startnumber_val) {
1031 rep->start_number = rep->first_seq_no = (int64_t) strtoll(startnumber_val, NULL, 10);
1032 av_log(s, AV_LOG_TRACE, "rep->first_seq_no = [%"PRId64"]\n", rep->first_seq_no);
1033 xmlFree(startnumber_val);
1036 fragmenturl_node = xmlFirstElementChild(representation_segmentlist_node);
1037 while (fragmenturl_node) {
1038 ret = parse_manifest_segmenturlnode(s, rep, fragmenturl_node,
1045 fragmenturl_node = xmlNextElementSibling(fragmenturl_node);
1048 fragment_timeline_node = find_child_node_by_name(representation_segmenttemplate_node, "SegmentTimeline");
1050 if (!fragment_timeline_node)
1051 fragment_timeline_node = find_child_node_by_name(fragment_template_node, "SegmentTimeline");
1052 if (!fragment_timeline_node)
1053 fragment_timeline_node = find_child_node_by_name(adaptionset_segmentlist_node, "SegmentTimeline");
1054 if (!fragment_timeline_node)
1055 fragment_timeline_node = find_child_node_by_name(period_segmentlist_node, "SegmentTimeline");
1056 if (fragment_timeline_node) {
1057 fragment_timeline_node = xmlFirstElementChild(fragment_timeline_node);
1058 while (fragment_timeline_node) {
1059 ret = parse_manifest_segmenttimeline(s, rep, fragment_timeline_node);
1063 fragment_timeline_node = xmlNextElementSibling(fragment_timeline_node);
1067 free_representation(rep);
1069 av_log(s, AV_LOG_ERROR, "Unknown format of Representation node id[%s] \n", (const char *)rep_id_val);
1073 if (rep->fragment_duration > 0 && !rep->fragment_timescale)
1074 rep->fragment_timescale = 1;
1075 rep->bandwidth = rep_bandwidth_val ? atoi(rep_bandwidth_val) : 0;
1076 strncpy(rep->id, rep_id_val ? rep_id_val : "", sizeof(rep->id));
1077 rep->framerate = av_make_q(0, 0);
1078 if (type == AVMEDIA_TYPE_VIDEO && rep_framerate_val) {
1079 ret = av_parse_video_rate(&rep->framerate, rep_framerate_val);
1081 av_log(s, AV_LOG_VERBOSE, "Ignoring invalid frame rate '%s'\n", rep_framerate_val);
1085 case AVMEDIA_TYPE_VIDEO:
1086 rep->rep_idx = video_rep_idx;
1087 dynarray_add(&c->videos, &c->n_videos, rep);
1089 case AVMEDIA_TYPE_AUDIO:
1090 rep->rep_idx = audio_rep_idx;
1091 dynarray_add(&c->audios, &c->n_audios, rep);
1093 case AVMEDIA_TYPE_SUBTITLE:
1094 rep->rep_idx = subtitle_rep_idx;
1095 dynarray_add(&c->subtitles, &c->n_subtitles, rep);
1098 av_log(s, AV_LOG_WARNING, "Unsupported the stream type %d\n", type);
1104 video_rep_idx += type == AVMEDIA_TYPE_VIDEO;
1105 audio_rep_idx += type == AVMEDIA_TYPE_AUDIO;
1106 subtitle_rep_idx += type == AVMEDIA_TYPE_SUBTITLE;
1110 xmlFree(rep_id_val);
1111 if (rep_bandwidth_val)
1112 xmlFree(rep_bandwidth_val);
1113 if (rep_framerate_val)
1114 xmlFree(rep_framerate_val);
1119 static int parse_manifest_adaptationset_attr(AVFormatContext *s, xmlNodePtr adaptionset_node)
1121 DASHContext *c = s->priv_data;
1123 if (!adaptionset_node) {
1124 av_log(s, AV_LOG_WARNING, "Cannot get AdaptionSet\n");
1125 return AVERROR(EINVAL);
1127 c->adaptionset_lang = xmlGetProp(adaptionset_node, "lang");
1132 static int parse_manifest_adaptationset(AVFormatContext *s, const char *url,
1133 xmlNodePtr adaptionset_node,
1134 xmlNodePtr mpd_baseurl_node,
1135 xmlNodePtr period_baseurl_node,
1136 xmlNodePtr period_segmenttemplate_node,
1137 xmlNodePtr period_segmentlist_node)
1140 DASHContext *c = s->priv_data;
1141 xmlNodePtr fragment_template_node = NULL;
1142 xmlNodePtr content_component_node = NULL;
1143 xmlNodePtr adaptionset_baseurl_node = NULL;
1144 xmlNodePtr adaptionset_segmentlist_node = NULL;
1145 xmlNodePtr adaptionset_supplementalproperty_node = NULL;
1146 xmlNodePtr node = NULL;
1148 ret = parse_manifest_adaptationset_attr(s, adaptionset_node);
1152 node = xmlFirstElementChild(adaptionset_node);
1154 if (!av_strcasecmp(node->name, (const char *)"SegmentTemplate")) {
1155 fragment_template_node = node;
1156 } else if (!av_strcasecmp(node->name, (const char *)"ContentComponent")) {
1157 content_component_node = node;
1158 } else if (!av_strcasecmp(node->name, (const char *)"BaseURL")) {
1159 adaptionset_baseurl_node = node;
1160 } else if (!av_strcasecmp(node->name, (const char *)"SegmentList")) {
1161 adaptionset_segmentlist_node = node;
1162 } else if (!av_strcasecmp(node->name, (const char *)"SupplementalProperty")) {
1163 adaptionset_supplementalproperty_node = node;
1164 } else if (!av_strcasecmp(node->name, (const char *)"Representation")) {
1165 ret = parse_manifest_representation(s, url, node,
1168 period_baseurl_node,
1169 period_segmenttemplate_node,
1170 period_segmentlist_node,
1171 fragment_template_node,
1172 content_component_node,
1173 adaptionset_baseurl_node,
1174 adaptionset_segmentlist_node,
1175 adaptionset_supplementalproperty_node);
1179 node = xmlNextElementSibling(node);
1183 av_freep(&c->adaptionset_lang);
1187 static int parse_programinformation(AVFormatContext *s, xmlNodePtr node)
1189 xmlChar *val = NULL;
1191 node = xmlFirstElementChild(node);
1193 if (!av_strcasecmp(node->name, "Title")) {
1194 val = xmlNodeGetContent(node);
1196 av_dict_set(&s->metadata, "Title", val, 0);
1198 } else if (!av_strcasecmp(node->name, "Source")) {
1199 val = xmlNodeGetContent(node);
1201 av_dict_set(&s->metadata, "Source", val, 0);
1203 } else if (!av_strcasecmp(node->name, "Copyright")) {
1204 val = xmlNodeGetContent(node);
1206 av_dict_set(&s->metadata, "Copyright", val, 0);
1209 node = xmlNextElementSibling(node);
1216 static int parse_manifest(AVFormatContext *s, const char *url, AVIOContext *in)
1218 DASHContext *c = s->priv_data;
1221 uint8_t *new_url = NULL;
1222 int64_t filesize = 0;
1223 char *buffer = NULL;
1224 AVDictionary *opts = NULL;
1226 xmlNodePtr root_element = NULL;
1227 xmlNodePtr node = NULL;
1228 xmlNodePtr period_node = NULL;
1229 xmlNodePtr tmp_node = NULL;
1230 xmlNodePtr mpd_baseurl_node = NULL;
1231 xmlNodePtr period_baseurl_node = NULL;
1232 xmlNodePtr period_segmenttemplate_node = NULL;
1233 xmlNodePtr period_segmentlist_node = NULL;
1234 xmlNodePtr adaptionset_node = NULL;
1235 xmlAttrPtr attr = NULL;
1237 uint32_t period_duration_sec = 0;
1238 uint32_t period_start_sec = 0;
1243 av_dict_copy(&opts, c->avio_opts, 0);
1244 ret = avio_open2(&in, url, AVIO_FLAG_READ, c->interrupt_callback, &opts);
1245 av_dict_free(&opts);
1250 if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >= 0) {
1251 c->base_url = av_strdup(new_url);
1253 c->base_url = av_strdup(url);
1256 filesize = avio_size(in);
1257 if (filesize <= 0) {
1258 filesize = 8 * 1024;
1261 buffer = av_mallocz(filesize);
1263 av_free(c->base_url);
1264 return AVERROR(ENOMEM);
1267 filesize = avio_read(in, buffer, filesize);
1268 if (filesize <= 0) {
1269 av_log(s, AV_LOG_ERROR, "Unable to read to offset '%s'\n", url);
1270 ret = AVERROR_INVALIDDATA;
1274 doc = xmlReadMemory(buffer, filesize, c->base_url, NULL, 0);
1275 root_element = xmlDocGetRootElement(doc);
1276 node = root_element;
1279 ret = AVERROR_INVALIDDATA;
1280 av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing root node\n", url);
1284 if (node->type != XML_ELEMENT_NODE ||
1285 av_strcasecmp(node->name, (const char *)"MPD")) {
1286 ret = AVERROR_INVALIDDATA;
1287 av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - wrong root node name[%s] type[%d]\n", url, node->name, (int)node->type);
1291 val = xmlGetProp(node, "type");
1293 av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing type attrib\n", url);
1294 ret = AVERROR_INVALIDDATA;
1297 if (!av_strcasecmp(val, (const char *)"dynamic"))
1301 attr = node->properties;
1303 val = xmlGetProp(node, attr->name);
1305 if (!av_strcasecmp(attr->name, (const char *)"availabilityStartTime")) {
1306 c->availability_start_time = get_utc_date_time_insec(s, (const char *)val);
1307 av_log(s, AV_LOG_TRACE, "c->availability_start_time = [%"PRId64"]\n", c->availability_start_time);
1308 } else if (!av_strcasecmp(attr->name, (const char *)"availabilityEndTime")) {
1309 c->availability_end_time = get_utc_date_time_insec(s, (const char *)val);
1310 av_log(s, AV_LOG_TRACE, "c->availability_end_time = [%"PRId64"]\n", c->availability_end_time);
1311 } else if (!av_strcasecmp(attr->name, (const char *)"publishTime")) {
1312 c->publish_time = get_utc_date_time_insec(s, (const char *)val);
1313 av_log(s, AV_LOG_TRACE, "c->publish_time = [%"PRId64"]\n", c->publish_time);
1314 } else if (!av_strcasecmp(attr->name, (const char *)"minimumUpdatePeriod")) {
1315 c->minimum_update_period = get_duration_insec(s, (const char *)val);
1316 av_log(s, AV_LOG_TRACE, "c->minimum_update_period = [%"PRId64"]\n", c->minimum_update_period);
1317 } else if (!av_strcasecmp(attr->name, (const char *)"timeShiftBufferDepth")) {
1318 c->time_shift_buffer_depth = get_duration_insec(s, (const char *)val);
1319 av_log(s, AV_LOG_TRACE, "c->time_shift_buffer_depth = [%"PRId64"]\n", c->time_shift_buffer_depth);
1320 } else if (!av_strcasecmp(attr->name, (const char *)"minBufferTime")) {
1321 c->min_buffer_time = get_duration_insec(s, (const char *)val);
1322 av_log(s, AV_LOG_TRACE, "c->min_buffer_time = [%"PRId64"]\n", c->min_buffer_time);
1323 } else if (!av_strcasecmp(attr->name, (const char *)"suggestedPresentationDelay")) {
1324 c->suggested_presentation_delay = get_duration_insec(s, (const char *)val);
1325 av_log(s, AV_LOG_TRACE, "c->suggested_presentation_delay = [%"PRId64"]\n", c->suggested_presentation_delay);
1326 } else if (!av_strcasecmp(attr->name, (const char *)"mediaPresentationDuration")) {
1327 c->media_presentation_duration = get_duration_insec(s, (const char *)val);
1328 av_log(s, AV_LOG_TRACE, "c->media_presentation_duration = [%"PRId64"]\n", c->media_presentation_duration);
1334 tmp_node = find_child_node_by_name(node, "BaseURL");
1336 mpd_baseurl_node = xmlCopyNode(tmp_node,1);
1338 mpd_baseurl_node = xmlNewNode(NULL, "BaseURL");
1341 // at now we can handle only one period, with the longest duration
1342 node = xmlFirstElementChild(node);
1344 if (!av_strcasecmp(node->name, (const char *)"Period")) {
1345 period_duration_sec = 0;
1346 period_start_sec = 0;
1347 attr = node->properties;
1349 val = xmlGetProp(node, attr->name);
1350 if (!av_strcasecmp(attr->name, (const char *)"duration")) {
1351 period_duration_sec = get_duration_insec(s, (const char *)val);
1352 } else if (!av_strcasecmp(attr->name, (const char *)"start")) {
1353 period_start_sec = get_duration_insec(s, (const char *)val);
1358 if ((period_duration_sec) >= (c->period_duration)) {
1360 c->period_duration = period_duration_sec;
1361 c->period_start = period_start_sec;
1362 if (c->period_start > 0)
1363 c->media_presentation_duration = c->period_duration;
1365 } else if (!av_strcasecmp(node->name, "ProgramInformation")) {
1366 parse_programinformation(s, node);
1368 node = xmlNextElementSibling(node);
1371 av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing Period node\n", url);
1372 ret = AVERROR_INVALIDDATA;
1376 adaptionset_node = xmlFirstElementChild(period_node);
1377 while (adaptionset_node) {
1378 if (!av_strcasecmp(adaptionset_node->name, (const char *)"BaseURL")) {
1379 period_baseurl_node = adaptionset_node;
1380 } else if (!av_strcasecmp(adaptionset_node->name, (const char *)"SegmentTemplate")) {
1381 period_segmenttemplate_node = adaptionset_node;
1382 } else if (!av_strcasecmp(adaptionset_node->name, (const char *)"SegmentList")) {
1383 period_segmentlist_node = adaptionset_node;
1384 } else if (!av_strcasecmp(adaptionset_node->name, (const char *)"AdaptationSet")) {
1385 parse_manifest_adaptationset(s, url, adaptionset_node, mpd_baseurl_node, period_baseurl_node, period_segmenttemplate_node, period_segmentlist_node);
1387 adaptionset_node = xmlNextElementSibling(adaptionset_node);
1390 /*free the document */
1393 xmlFreeNode(mpd_baseurl_node);
1404 static int64_t calc_cur_seg_no(AVFormatContext *s, struct representation *pls)
1406 DASHContext *c = s->priv_data;
1408 int64_t start_time_offset = 0;
1411 if (pls->n_fragments) {
1412 av_log(s, AV_LOG_TRACE, "in n_fragments mode\n");
1413 num = pls->first_seq_no;
1414 } else if (pls->n_timelines) {
1415 av_log(s, AV_LOG_TRACE, "in n_timelines mode\n");
1416 start_time_offset = get_segment_start_time_based_on_timeline(pls, 0xFFFFFFFF) - 60 * pls->fragment_timescale; // 60 seconds before end
1417 num = calc_next_seg_no_from_timelines(pls, start_time_offset);
1419 num = pls->first_seq_no;
1421 num += pls->first_seq_no;
1422 } else if (pls->fragment_duration){
1423 av_log(s, AV_LOG_TRACE, "in fragment_duration mode fragment_timescale = %"PRId64", presentation_timeoffset = %"PRId64"\n", pls->fragment_timescale, pls->presentation_timeoffset);
1424 if (pls->presentation_timeoffset) {
1425 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;
1426 } else if (c->publish_time > 0 && !c->availability_start_time) {
1427 if (c->min_buffer_time) {
1428 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;
1430 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;
1433 num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time) - c->suggested_presentation_delay) * pls->fragment_timescale) / pls->fragment_duration;
1437 num = pls->first_seq_no;
1442 static int64_t calc_min_seg_no(AVFormatContext *s, struct representation *pls)
1444 DASHContext *c = s->priv_data;
1447 if (c->is_live && pls->fragment_duration) {
1448 av_log(s, AV_LOG_TRACE, "in live mode\n");
1449 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;
1451 num = pls->first_seq_no;
1456 static int64_t calc_max_seg_no(struct representation *pls, DASHContext *c)
1460 if (pls->n_fragments) {
1461 num = pls->first_seq_no + pls->n_fragments - 1;
1462 } else if (pls->n_timelines) {
1464 num = pls->first_seq_no + pls->n_timelines - 1;
1465 for (i = 0; i < pls->n_timelines; i++) {
1466 if (pls->timelines[i]->repeat == -1) {
1467 int length_of_each_segment = pls->timelines[i]->duration / pls->fragment_timescale;
1468 num = c->period_duration / length_of_each_segment;
1470 num += pls->timelines[i]->repeat;
1473 } else if (c->is_live && pls->fragment_duration) {
1474 num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time)) * pls->fragment_timescale) / pls->fragment_duration;
1475 } else if (pls->fragment_duration) {
1476 num = pls->first_seq_no + (c->media_presentation_duration * pls->fragment_timescale) / pls->fragment_duration;
1482 static void move_timelines(struct representation *rep_src, struct representation *rep_dest, DASHContext *c)
1484 if (rep_dest && rep_src ) {
1485 free_timelines_list(rep_dest);
1486 rep_dest->timelines = rep_src->timelines;
1487 rep_dest->n_timelines = rep_src->n_timelines;
1488 rep_dest->first_seq_no = rep_src->first_seq_no;
1489 rep_dest->last_seq_no = calc_max_seg_no(rep_dest, c);
1490 rep_src->timelines = NULL;
1491 rep_src->n_timelines = 0;
1492 rep_dest->cur_seq_no = rep_src->cur_seq_no;
1496 static void move_segments(struct representation *rep_src, struct representation *rep_dest, DASHContext *c)
1498 if (rep_dest && rep_src ) {
1499 free_fragment_list(rep_dest);
1500 if (rep_src->start_number > (rep_dest->start_number + rep_dest->n_fragments))
1501 rep_dest->cur_seq_no = 0;
1503 rep_dest->cur_seq_no += rep_src->start_number - rep_dest->start_number;
1504 rep_dest->fragments = rep_src->fragments;
1505 rep_dest->n_fragments = rep_src->n_fragments;
1506 rep_dest->parent = rep_src->parent;
1507 rep_dest->last_seq_no = calc_max_seg_no(rep_dest, c);
1508 rep_src->fragments = NULL;
1509 rep_src->n_fragments = 0;
1514 static int refresh_manifest(AVFormatContext *s)
1517 DASHContext *c = s->priv_data;
1518 // save current context
1519 int n_videos = c->n_videos;
1520 struct representation **videos = c->videos;
1521 int n_audios = c->n_audios;
1522 struct representation **audios = c->audios;
1523 int n_subtitles = c->n_subtitles;
1524 struct representation **subtitles = c->subtitles;
1525 char *base_url = c->base_url;
1533 c->subtitles = NULL;
1534 ret = parse_manifest(s, s->url, NULL);
1538 if (c->n_videos != n_videos) {
1539 av_log(c, AV_LOG_ERROR,
1540 "new manifest has mismatched no. of video representations, %d -> %d\n",
1541 n_videos, c->n_videos);
1542 return AVERROR_INVALIDDATA;
1544 if (c->n_audios != n_audios) {
1545 av_log(c, AV_LOG_ERROR,
1546 "new manifest has mismatched no. of audio representations, %d -> %d\n",
1547 n_audios, c->n_audios);
1548 return AVERROR_INVALIDDATA;
1550 if (c->n_subtitles != n_subtitles) {
1551 av_log(c, AV_LOG_ERROR,
1552 "new manifest has mismatched no. of subtitles representations, %d -> %d\n",
1553 n_subtitles, c->n_subtitles);
1554 return AVERROR_INVALIDDATA;
1557 for (i = 0; i < n_videos; i++) {
1558 struct representation *cur_video = videos[i];
1559 struct representation *ccur_video = c->videos[i];
1560 if (cur_video->timelines) {
1561 // calc current time
1562 int64_t currentTime = get_segment_start_time_based_on_timeline(cur_video, cur_video->cur_seq_no) / cur_video->fragment_timescale;
1564 ccur_video->cur_seq_no = calc_next_seg_no_from_timelines(ccur_video, currentTime * cur_video->fragment_timescale - 1);
1565 if (ccur_video->cur_seq_no >= 0) {
1566 move_timelines(ccur_video, cur_video, c);
1569 if (cur_video->fragments) {
1570 move_segments(ccur_video, cur_video, c);
1573 for (i = 0; i < n_audios; i++) {
1574 struct representation *cur_audio = audios[i];
1575 struct representation *ccur_audio = c->audios[i];
1576 if (cur_audio->timelines) {
1577 // calc current time
1578 int64_t currentTime = get_segment_start_time_based_on_timeline(cur_audio, cur_audio->cur_seq_no) / cur_audio->fragment_timescale;
1580 ccur_audio->cur_seq_no = calc_next_seg_no_from_timelines(ccur_audio, currentTime * cur_audio->fragment_timescale - 1);
1581 if (ccur_audio->cur_seq_no >= 0) {
1582 move_timelines(ccur_audio, cur_audio, c);
1585 if (cur_audio->fragments) {
1586 move_segments(ccur_audio, cur_audio, c);
1595 c->base_url = base_url;
1598 free_subtitle_list(c);
1604 c->n_subtitles = n_subtitles;
1605 c->subtitles = subtitles;
1606 c->n_audios = n_audios;
1608 c->n_videos = n_videos;
1613 static struct fragment *get_current_fragment(struct representation *pls)
1615 int64_t min_seq_no = 0;
1616 int64_t max_seq_no = 0;
1617 struct fragment *seg = NULL;
1618 struct fragment *seg_ptr = NULL;
1619 DASHContext *c = pls->parent->priv_data;
1621 while (( !ff_check_interrupt(c->interrupt_callback)&& pls->n_fragments > 0)) {
1622 if (pls->cur_seq_no < pls->n_fragments) {
1623 seg_ptr = pls->fragments[pls->cur_seq_no];
1624 seg = av_mallocz(sizeof(struct fragment));
1628 seg->url = av_strdup(seg_ptr->url);
1633 seg->size = seg_ptr->size;
1634 seg->url_offset = seg_ptr->url_offset;
1636 } else if (c->is_live) {
1637 refresh_manifest(pls->parent);
1643 min_seq_no = calc_min_seg_no(pls->parent, pls);
1644 max_seq_no = calc_max_seg_no(pls, c);
1646 if (pls->timelines || pls->fragments) {
1647 refresh_manifest(pls->parent);
1649 if (pls->cur_seq_no <= min_seq_no) {
1650 av_log(pls->parent, AV_LOG_VERBOSE, "old fragment: cur[%"PRId64"] min[%"PRId64"] max[%"PRId64"], playlist %d\n", (int64_t)pls->cur_seq_no, min_seq_no, max_seq_no, (int)pls->rep_idx);
1651 pls->cur_seq_no = calc_cur_seg_no(pls->parent, pls);
1652 } else if (pls->cur_seq_no > max_seq_no) {
1653 av_log(pls->parent, AV_LOG_VERBOSE, "new fragment: min[%"PRId64"] max[%"PRId64"], playlist %d\n", min_seq_no, max_seq_no, (int)pls->rep_idx);
1655 seg = av_mallocz(sizeof(struct fragment));
1659 } else if (pls->cur_seq_no <= pls->last_seq_no) {
1660 seg = av_mallocz(sizeof(struct fragment));
1666 char *tmpfilename= av_mallocz(c->max_url_size);
1670 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));
1671 seg->url = av_strireplace(pls->url_template, pls->url_template, tmpfilename);
1673 av_log(pls->parent, AV_LOG_WARNING, "Unable to resolve template url '%s', try to use origin template\n", pls->url_template);
1674 seg->url = av_strdup(pls->url_template);
1676 av_log(pls->parent, AV_LOG_ERROR, "Cannot resolve template url '%s'\n", pls->url_template);
1677 av_free(tmpfilename);
1681 av_free(tmpfilename);
1688 static int read_from_url(struct representation *pls, struct fragment *seg,
1689 uint8_t *buf, int buf_size)
1693 /* limit read if the fragment was only a part of a file */
1695 buf_size = FFMIN(buf_size, pls->cur_seg_size - pls->cur_seg_offset);
1697 ret = avio_read(pls->input, buf, buf_size);
1699 pls->cur_seg_offset += ret;
1704 static int open_input(DASHContext *c, struct representation *pls, struct fragment *seg)
1706 AVDictionary *opts = NULL;
1710 url = av_mallocz(c->max_url_size);
1712 ret = AVERROR(ENOMEM);
1716 if (seg->size >= 0) {
1717 /* try to restrict the HTTP request to the part we want
1718 * (if this is in fact a HTTP request) */
1719 av_dict_set_int(&opts, "offset", seg->url_offset, 0);
1720 av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
1723 ff_make_absolute_url(url, c->max_url_size, c->base_url, seg->url);
1724 av_log(pls->parent, AV_LOG_VERBOSE, "DASH request for url '%s', offset %"PRId64", playlist %d\n",
1725 url, seg->url_offset, pls->rep_idx);
1726 ret = open_url(pls->parent, &pls->input, url, c->avio_opts, opts, NULL);
1730 av_dict_free(&opts);
1731 pls->cur_seg_offset = 0;
1732 pls->cur_seg_size = seg->size;
1736 static int update_init_section(struct representation *pls)
1738 static const int max_init_section_size = 1024 * 1024;
1739 DASHContext *c = pls->parent->priv_data;
1744 if (!pls->init_section || pls->init_sec_buf)
1747 ret = open_input(c, pls, pls->init_section);
1749 av_log(pls->parent, AV_LOG_WARNING,
1750 "Failed to open an initialization section in playlist %d\n",
1755 if (pls->init_section->size >= 0)
1756 sec_size = pls->init_section->size;
1757 else if ((urlsize = avio_size(pls->input)) >= 0)
1760 sec_size = max_init_section_size;
1762 av_log(pls->parent, AV_LOG_DEBUG,
1763 "Downloading an initialization section of size %"PRId64"\n",
1766 sec_size = FFMIN(sec_size, max_init_section_size);
1768 av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size);
1770 ret = read_from_url(pls, pls->init_section, pls->init_sec_buf,
1771 pls->init_sec_buf_size);
1772 ff_format_io_close(pls->parent, &pls->input);
1777 pls->init_sec_data_len = ret;
1778 pls->init_sec_buf_read_offset = 0;
1783 static int64_t seek_data(void *opaque, int64_t offset, int whence)
1785 struct representation *v = opaque;
1786 if (v->n_fragments && !v->init_sec_data_len) {
1787 return avio_seek(v->input, offset, whence);
1790 return AVERROR(ENOSYS);
1793 static int read_data(void *opaque, uint8_t *buf, int buf_size)
1796 struct representation *v = opaque;
1797 DASHContext *c = v->parent->priv_data;
1801 free_fragment(&v->cur_seg);
1802 v->cur_seg = get_current_fragment(v);
1808 /* load/update Media Initialization Section, if any */
1809 ret = update_init_section(v);
1813 ret = open_input(c, v, v->cur_seg);
1815 if (ff_check_interrupt(c->interrupt_callback)) {
1819 av_log(v->parent, AV_LOG_WARNING, "Failed to open fragment of playlist %d\n", v->rep_idx);
1825 if (v->init_sec_buf_read_offset < v->init_sec_data_len) {
1826 /* Push init section out first before first actual fragment */
1827 int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size);
1828 memcpy(buf, v->init_sec_buf, copy_size);
1829 v->init_sec_buf_read_offset += copy_size;
1834 /* check the v->cur_seg, if it is null, get current and double check if the new v->cur_seg*/
1836 v->cur_seg = get_current_fragment(v);
1842 ret = read_from_url(v, v->cur_seg, buf, buf_size);
1846 if (c->is_live || v->cur_seq_no < v->last_seq_no) {
1847 if (!v->is_restart_needed)
1849 v->is_restart_needed = 1;
1856 static int save_avio_options(AVFormatContext *s)
1858 DASHContext *c = s->priv_data;
1859 const char *opts[] = {
1860 "headers", "user_agent", "cookies", "http_proxy", "referer", "rw_timeout", "icy", NULL };
1861 const char **opt = opts;
1862 uint8_t *buf = NULL;
1866 if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN, &buf) >= 0) {
1867 if (buf[0] != '\0') {
1868 ret = av_dict_set(&c->avio_opts, *opt, buf, AV_DICT_DONT_STRDUP_VAL);
1883 static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url,
1884 int flags, AVDictionary **opts)
1886 av_log(s, AV_LOG_ERROR,
1887 "A DASH playlist item '%s' referred to an external file '%s'. "
1888 "Opening this file was forbidden for security reasons\n",
1890 return AVERROR(EPERM);
1893 static void close_demux_for_component(struct representation *pls)
1895 /* note: the internal buffer could have changed */
1896 av_freep(&pls->pb.buffer);
1897 memset(&pls->pb, 0x00, sizeof(AVIOContext));
1898 pls->ctx->pb = NULL;
1899 avformat_close_input(&pls->ctx);
1903 static int reopen_demux_for_component(AVFormatContext *s, struct representation *pls)
1905 DASHContext *c = s->priv_data;
1906 ff_const59 AVInputFormat *in_fmt = NULL;
1907 AVDictionary *in_fmt_opts = NULL;
1908 uint8_t *avio_ctx_buffer = NULL;
1912 close_demux_for_component(pls);
1915 if (ff_check_interrupt(&s->interrupt_callback)) {
1920 if (!(pls->ctx = avformat_alloc_context())) {
1921 ret = AVERROR(ENOMEM);
1925 avio_ctx_buffer = av_malloc(INITIAL_BUFFER_SIZE);
1926 if (!avio_ctx_buffer ) {
1927 ret = AVERROR(ENOMEM);
1928 avformat_free_context(pls->ctx);
1933 ffio_init_context(&pls->pb, avio_ctx_buffer , INITIAL_BUFFER_SIZE, 0, pls, read_data, NULL, NULL);
1935 ffio_init_context(&pls->pb, avio_ctx_buffer , INITIAL_BUFFER_SIZE, 0, pls, read_data, NULL, seek_data);
1937 pls->pb.seekable = 0;
1939 if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
1942 pls->ctx->flags = AVFMT_FLAG_CUSTOM_IO;
1943 pls->ctx->probesize = s->probesize > 0 ? s->probesize : 1024 * 4;
1944 pls->ctx->max_analyze_duration = s->max_analyze_duration > 0 ? s->max_analyze_duration : 4 * AV_TIME_BASE;
1945 ret = av_probe_input_buffer(&pls->pb, &in_fmt, "", NULL, 0, 0);
1947 av_log(s, AV_LOG_ERROR, "Error when loading first fragment, playlist %d\n", (int)pls->rep_idx);
1948 avformat_free_context(pls->ctx);
1953 pls->ctx->pb = &pls->pb;
1954 pls->ctx->io_open = nested_io_open;
1956 // provide additional information from mpd if available
1957 ret = avformat_open_input(&pls->ctx, "", in_fmt, &in_fmt_opts); //pls->init_section->url
1958 av_dict_free(&in_fmt_opts);
1961 if (pls->n_fragments) {
1962 #if FF_API_R_FRAME_RATE
1963 if (pls->framerate.den) {
1964 for (i = 0; i < pls->ctx->nb_streams; i++)
1965 pls->ctx->streams[i]->r_frame_rate = pls->framerate;
1968 ret = avformat_find_stream_info(pls->ctx, NULL);
1977 static int open_demux_for_component(AVFormatContext *s, struct representation *pls)
1983 pls->cur_seq_no = calc_cur_seg_no(s, pls);
1985 if (!pls->last_seq_no) {
1986 pls->last_seq_no = calc_max_seg_no(pls, s->priv_data);
1989 ret = reopen_demux_for_component(s, pls);
1993 for (i = 0; i < pls->ctx->nb_streams; i++) {
1994 AVStream *st = avformat_new_stream(s, NULL);
1995 AVStream *ist = pls->ctx->streams[i];
1997 ret = AVERROR(ENOMEM);
2001 avcodec_parameters_copy(st->codecpar, ist->codecpar);
2002 avpriv_set_pts_info(st, ist->pts_wrap_bits, ist->time_base.num, ist->time_base.den);
2010 static int is_common_init_section_exist(struct representation **pls, int n_pls)
2012 struct fragment *first_init_section = pls[0]->init_section;
2014 int64_t url_offset = -1;
2018 if (first_init_section == NULL || n_pls == 0)
2021 url = first_init_section->url;
2022 url_offset = first_init_section->url_offset;
2023 size = pls[0]->init_section->size;
2024 for (i=0;i<n_pls;i++) {
2025 if (av_strcasecmp(pls[i]->init_section->url,url) || pls[i]->init_section->url_offset != url_offset || pls[i]->init_section->size != size) {
2032 static int copy_init_section(struct representation *rep_dest, struct representation *rep_src)
2034 rep_dest->init_sec_buf = av_mallocz(rep_src->init_sec_buf_size);
2035 if (!rep_dest->init_sec_buf) {
2036 av_log(rep_dest->ctx, AV_LOG_WARNING, "Cannot alloc memory for init_sec_buf\n");
2037 return AVERROR(ENOMEM);
2039 memcpy(rep_dest->init_sec_buf, rep_src->init_sec_buf, rep_src->init_sec_data_len);
2040 rep_dest->init_sec_buf_size = rep_src->init_sec_buf_size;
2041 rep_dest->init_sec_data_len = rep_src->init_sec_data_len;
2042 rep_dest->cur_timestamp = rep_src->cur_timestamp;
2048 static int dash_read_header(AVFormatContext *s)
2050 DASHContext *c = s->priv_data;
2051 struct representation *rep;
2053 int stream_index = 0;
2056 c->interrupt_callback = &s->interrupt_callback;
2058 if ((ret = save_avio_options(s)) < 0)
2061 if ((ret = parse_manifest(s, s->url, s->pb)) < 0)
2064 /* If this isn't a live stream, fill the total duration of the
2067 s->duration = (int64_t) c->media_presentation_duration * AV_TIME_BASE;
2069 av_dict_set(&c->avio_opts, "seekable", "0", 0);
2073 c->is_init_section_common_video = is_common_init_section_exist(c->videos, c->n_videos);
2075 /* Open the demuxer for video and audio components if available */
2076 for (i = 0; i < c->n_videos; i++) {
2078 if (i > 0 && c->is_init_section_common_video) {
2079 ret = copy_init_section(rep, c->videos[0]);
2083 ret = open_demux_for_component(s, rep);
2087 rep->stream_index = stream_index;
2092 c->is_init_section_common_audio = is_common_init_section_exist(c->audios, c->n_audios);
2094 for (i = 0; i < c->n_audios; i++) {
2096 if (i > 0 && c->is_init_section_common_audio) {
2097 ret = copy_init_section(rep, c->audios[0]);
2101 ret = open_demux_for_component(s, rep);
2105 rep->stream_index = stream_index;
2110 c->is_init_section_common_audio = is_common_init_section_exist(c->subtitles, c->n_subtitles);
2112 for (i = 0; i < c->n_subtitles; i++) {
2113 rep = c->subtitles[i];
2114 if (i > 0 && c->is_init_section_common_audio) {
2115 ret = copy_init_section(rep, c->subtitles[0]);
2119 ret = open_demux_for_component(s, rep);
2123 rep->stream_index = stream_index;
2127 if (!stream_index) {
2128 ret = AVERROR_INVALIDDATA;
2132 /* Create a program */
2135 program = av_new_program(s, 0);
2140 for (i = 0; i < c->n_videos; i++) {
2142 av_program_add_stream_index(s, 0, rep->stream_index);
2143 rep->assoc_stream = s->streams[rep->stream_index];
2144 if (rep->bandwidth > 0)
2145 av_dict_set_int(&rep->assoc_stream->metadata, "variant_bitrate", rep->bandwidth, 0);
2147 av_dict_set(&rep->assoc_stream->metadata, "id", rep->id, 0);
2149 for (i = 0; i < c->n_audios; i++) {
2151 av_program_add_stream_index(s, 0, rep->stream_index);
2152 rep->assoc_stream = s->streams[rep->stream_index];
2153 if (rep->bandwidth > 0)
2154 av_dict_set_int(&rep->assoc_stream->metadata, "variant_bitrate", rep->bandwidth, 0);
2156 av_dict_set(&rep->assoc_stream->metadata, "id", rep->id, 0);
2158 av_dict_set(&rep->assoc_stream->metadata, "language", rep->lang, 0);
2159 av_freep(&rep->lang);
2162 for (i = 0; i < c->n_subtitles; i++) {
2163 rep = c->subtitles[i];
2164 av_program_add_stream_index(s, 0, rep->stream_index);
2165 rep->assoc_stream = s->streams[rep->stream_index];
2167 av_dict_set(&rep->assoc_stream->metadata, "id", rep->id, 0);
2169 av_dict_set(&rep->assoc_stream->metadata, "language", rep->lang, 0);
2170 av_freep(&rep->lang);
2180 static void recheck_discard_flags(AVFormatContext *s, struct representation **p, int n)
2184 for (i = 0; i < n; i++) {
2185 struct representation *pls = p[i];
2186 int needed = !pls->assoc_stream || pls->assoc_stream->discard < AVDISCARD_ALL;
2188 if (needed && !pls->ctx) {
2189 pls->cur_seg_offset = 0;
2190 pls->init_sec_buf_read_offset = 0;
2192 for (j = 0; j < n; j++) {
2193 pls->cur_seq_no = FFMAX(pls->cur_seq_no, p[j]->cur_seq_no);
2195 reopen_demux_for_component(s, pls);
2196 av_log(s, AV_LOG_INFO, "Now receiving stream_index %d\n", pls->stream_index);
2197 } else if (!needed && pls->ctx) {
2198 close_demux_for_component(pls);
2199 ff_format_io_close(pls->parent, &pls->input);
2200 av_log(s, AV_LOG_INFO, "No longer receiving stream_index %d\n", pls->stream_index);
2205 static int dash_read_packet(AVFormatContext *s, AVPacket *pkt)
2207 DASHContext *c = s->priv_data;
2210 struct representation *cur = NULL;
2211 struct representation *rep = NULL;
2213 recheck_discard_flags(s, c->videos, c->n_videos);
2214 recheck_discard_flags(s, c->audios, c->n_audios);
2215 recheck_discard_flags(s, c->subtitles, c->n_subtitles);
2217 for (i = 0; i < c->n_videos; i++) {
2221 if (!cur || rep->cur_timestamp < mints) {
2223 mints = rep->cur_timestamp;
2226 for (i = 0; i < c->n_audios; i++) {
2230 if (!cur || rep->cur_timestamp < mints) {
2232 mints = rep->cur_timestamp;
2236 for (i = 0; i < c->n_subtitles; i++) {
2237 rep = c->subtitles[i];
2240 if (!cur || rep->cur_timestamp < mints) {
2242 mints = rep->cur_timestamp;
2247 return AVERROR_INVALIDDATA;
2249 while (!ff_check_interrupt(c->interrupt_callback) && !ret) {
2250 ret = av_read_frame(cur->ctx, pkt);
2252 /* If we got a packet, return it */
2253 cur->cur_timestamp = av_rescale(pkt->pts, (int64_t)cur->ctx->streams[0]->time_base.num * 90000, cur->ctx->streams[0]->time_base.den);
2254 pkt->stream_index = cur->stream_index;
2257 if (cur->is_restart_needed) {
2258 cur->cur_seg_offset = 0;
2259 cur->init_sec_buf_read_offset = 0;
2260 ff_format_io_close(cur->parent, &cur->input);
2261 ret = reopen_demux_for_component(s, cur);
2262 cur->is_restart_needed = 0;
2268 static int dash_close(AVFormatContext *s)
2270 DASHContext *c = s->priv_data;
2273 av_dict_free(&c->avio_opts);
2274 av_freep(&c->base_url);
2278 static int dash_seek(AVFormatContext *s, struct representation *pls, int64_t seek_pos_msec, int flags, int dry_run)
2283 int64_t duration = 0;
2285 av_log(pls->parent, AV_LOG_VERBOSE, "DASH seek pos[%"PRId64"ms], playlist %d%s\n",
2286 seek_pos_msec, pls->rep_idx, dry_run ? " (dry)" : "");
2288 // single fragment mode
2289 if (pls->n_fragments == 1) {
2290 pls->cur_timestamp = 0;
2291 pls->cur_seg_offset = 0;
2294 ff_read_frame_flush(pls->ctx);
2295 return av_seek_frame(pls->ctx, -1, seek_pos_msec * 1000, flags);
2298 ff_format_io_close(pls->parent, &pls->input);
2300 // find the nearest fragment
2301 if (pls->n_timelines > 0 && pls->fragment_timescale > 0) {
2302 int64_t num = pls->first_seq_no;
2303 av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with SegmentTimeline start n_timelines[%d] "
2304 "last_seq_no[%"PRId64"], playlist %d.\n",
2305 (int)pls->n_timelines, (int64_t)pls->last_seq_no, (int)pls->rep_idx);
2306 for (i = 0; i < pls->n_timelines; i++) {
2307 if (pls->timelines[i]->starttime > 0) {
2308 duration = pls->timelines[i]->starttime;
2310 duration += pls->timelines[i]->duration;
2311 if (seek_pos_msec < ((duration * 1000) / pls->fragment_timescale)) {
2314 for (j = 0; j < pls->timelines[i]->repeat; j++) {
2315 duration += pls->timelines[i]->duration;
2317 if (seek_pos_msec < ((duration * 1000) / pls->fragment_timescale)) {
2325 pls->cur_seq_no = num > pls->last_seq_no ? pls->last_seq_no : num;
2326 av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with SegmentTimeline end cur_seq_no[%"PRId64"], playlist %d.\n",
2327 (int64_t)pls->cur_seq_no, (int)pls->rep_idx);
2328 } else if (pls->fragment_duration > 0) {
2329 pls->cur_seq_no = pls->first_seq_no + ((seek_pos_msec * pls->fragment_timescale) / pls->fragment_duration) / 1000;
2331 av_log(pls->parent, AV_LOG_ERROR, "dash_seek missing timeline or fragment_duration\n");
2332 pls->cur_seq_no = pls->first_seq_no;
2334 pls->cur_timestamp = 0;
2335 pls->cur_seg_offset = 0;
2336 pls->init_sec_buf_read_offset = 0;
2337 ret = dry_run ? 0 : reopen_demux_for_component(s, pls);
2342 static int dash_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
2345 DASHContext *c = s->priv_data;
2346 int64_t seek_pos_msec = av_rescale_rnd(timestamp, 1000,
2347 s->streams[stream_index]->time_base.den,
2348 flags & AVSEEK_FLAG_BACKWARD ?
2349 AV_ROUND_DOWN : AV_ROUND_UP);
2350 if ((flags & AVSEEK_FLAG_BYTE) || c->is_live)
2351 return AVERROR(ENOSYS);
2353 /* Seek in discarded streams with dry_run=1 to avoid reopening them */
2354 for (i = 0; i < c->n_videos; i++) {
2356 ret = dash_seek(s, c->videos[i], seek_pos_msec, flags, !c->videos[i]->ctx);
2358 for (i = 0; i < c->n_audios; i++) {
2360 ret = dash_seek(s, c->audios[i], seek_pos_msec, flags, !c->audios[i]->ctx);
2362 for (i = 0; i < c->n_subtitles; i++) {
2364 ret = dash_seek(s, c->subtitles[i], seek_pos_msec, flags, !c->subtitles[i]->ctx);
2370 static int dash_probe(const AVProbeData *p)
2372 if (!av_stristr(p->buf, "<MPD"))
2375 if (av_stristr(p->buf, "dash:profile:isoff-on-demand:2011") ||
2376 av_stristr(p->buf, "dash:profile:isoff-live:2011") ||
2377 av_stristr(p->buf, "dash:profile:isoff-live:2012") ||
2378 av_stristr(p->buf, "dash:profile:isoff-main:2011") ||
2379 av_stristr(p->buf, "3GPP:PSS:profile:DASH1")) {
2380 return AVPROBE_SCORE_MAX;
2382 if (av_stristr(p->buf, "dash:profile")) {
2383 return AVPROBE_SCORE_MAX;
2389 #define OFFSET(x) offsetof(DASHContext, x)
2390 #define FLAGS AV_OPT_FLAG_DECODING_PARAM
2391 static const AVOption dash_options[] = {
2392 {"allowed_extensions", "List of file extensions that dash is allowed to access",
2393 OFFSET(allowed_extensions), AV_OPT_TYPE_STRING,
2394 {.str = "aac,m4a,m4s,m4v,mov,mp4,webm,ts"},
2395 INT_MIN, INT_MAX, FLAGS},
2399 static const AVClass dash_class = {
2400 .class_name = "dash",
2401 .item_name = av_default_item_name,
2402 .option = dash_options,
2403 .version = LIBAVUTIL_VERSION_INT,
2406 AVInputFormat ff_dash_demuxer = {
2408 .long_name = NULL_IF_CONFIG_SMALL("Dynamic Adaptive Streaming over HTTP"),
2409 .priv_class = &dash_class,
2410 .priv_data_size = sizeof(DASHContext),
2411 .read_probe = dash_probe,
2412 .read_header = dash_read_header,
2413 .read_packet = dash_read_packet,
2414 .read_close = dash_close,
2415 .read_seek = dash_read_seek,
2416 .flags = AVFMT_NO_BYTE_SEEK,