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);
362 av_freep(&pls->lang);
366 static void free_video_list(DASHContext *c)
369 for (i = 0; i < c->n_videos; i++) {
370 struct representation *pls = c->videos[i];
371 free_representation(pls);
373 av_freep(&c->videos);
377 static void free_audio_list(DASHContext *c)
380 for (i = 0; i < c->n_audios; i++) {
381 struct representation *pls = c->audios[i];
382 free_representation(pls);
384 av_freep(&c->audios);
388 static void free_subtitle_list(DASHContext *c)
391 for (i = 0; i < c->n_subtitles; i++) {
392 struct representation *pls = c->subtitles[i];
393 free_representation(pls);
395 av_freep(&c->subtitles);
399 static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url,
400 AVDictionary **opts, AVDictionary *opts2, int *is_http)
402 DASHContext *c = s->priv_data;
403 AVDictionary *tmp = NULL;
404 const char *proto_name = NULL;
407 if (av_strstart(url, "crypto", NULL)) {
408 if (url[6] == '+' || url[6] == ':')
409 proto_name = avio_find_protocol_name(url + 7);
413 proto_name = avio_find_protocol_name(url);
416 return AVERROR_INVALIDDATA;
418 // only http(s) & file are allowed
419 if (av_strstart(proto_name, "file", NULL)) {
420 if (strcmp(c->allowed_extensions, "ALL") && !av_match_ext(url, c->allowed_extensions)) {
421 av_log(s, AV_LOG_ERROR,
422 "Filename extension of \'%s\' is not a common multimedia extension, blocked for security reasons.\n"
423 "If you wish to override this adjust allowed_extensions, you can set it to \'ALL\' to allow all\n",
425 return AVERROR_INVALIDDATA;
427 } else if (av_strstart(proto_name, "http", NULL)) {
430 return AVERROR_INVALIDDATA;
432 if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':')
434 else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':')
436 else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))
437 return AVERROR_INVALIDDATA;
440 av_dict_copy(&tmp, *opts, 0);
441 av_dict_copy(&tmp, opts2, 0);
442 ret = avio_open2(pb, url, AVIO_FLAG_READ, c->interrupt_callback, &tmp);
444 // update cookies on http response with setcookies.
445 char *new_cookies = NULL;
447 if (!(s->flags & AVFMT_FLAG_CUSTOM_IO))
448 av_opt_get(*pb, "cookies", AV_OPT_SEARCH_CHILDREN, (uint8_t**)&new_cookies);
451 av_dict_set(opts, "cookies", new_cookies, AV_DICT_DONT_STRDUP_VAL);
459 *is_http = av_strstart(proto_name, "http", NULL);
464 static char *get_content_url(xmlNodePtr *baseurl_nodes,
468 char *rep_bandwidth_val,
474 char *tmp_str = av_mallocz(max_url_size);
475 char *tmp_str_2 = av_mallocz(max_url_size);
477 if (!tmp_str || !tmp_str_2) {
481 for (i = 0; i < n_baseurl_nodes; ++i) {
482 if (baseurl_nodes[i] &&
483 baseurl_nodes[i]->children &&
484 baseurl_nodes[i]->children->type == XML_TEXT_NODE) {
485 text = xmlNodeGetContent(baseurl_nodes[i]->children);
487 memset(tmp_str, 0, max_url_size);
488 memset(tmp_str_2, 0, max_url_size);
489 ff_make_absolute_url(tmp_str_2, max_url_size, tmp_str, text);
490 av_strlcpy(tmp_str, tmp_str_2, max_url_size);
497 ff_make_absolute_url(tmp_str, max_url_size, tmp_str, val);
500 url = av_strireplace(tmp_str, "$RepresentationID$", (const char*)rep_id_val);
504 av_strlcpy(tmp_str, url, max_url_size);
506 if (rep_bandwidth_val && tmp_str[0] != '\0') {
507 // free any previously assigned url before reassigning
509 url = av_strireplace(tmp_str, "$Bandwidth$", (const char*)rep_bandwidth_val);
520 static char *get_val_from_nodes_tab(xmlNodePtr *nodes, const int n_nodes, const char *attrname)
525 for (i = 0; i < n_nodes; ++i) {
527 val = xmlGetProp(nodes[i], attrname);
536 static xmlNodePtr find_child_node_by_name(xmlNodePtr rootnode, const char *nodename)
538 xmlNodePtr node = rootnode;
543 node = xmlFirstElementChild(node);
545 if (!av_strcasecmp(node->name, nodename)) {
548 node = xmlNextElementSibling(node);
553 static enum AVMediaType get_content_type(xmlNodePtr node)
555 enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
561 for (i = 0; i < 2; i++) {
562 attr = i ? "mimeType" : "contentType";
563 val = xmlGetProp(node, attr);
565 if (av_stristr((const char *)val, "video")) {
566 type = AVMEDIA_TYPE_VIDEO;
567 } else if (av_stristr((const char *)val, "audio")) {
568 type = AVMEDIA_TYPE_AUDIO;
569 } else if (av_stristr((const char *)val, "text")) {
570 type = AVMEDIA_TYPE_SUBTITLE;
579 static struct fragment * get_Fragment(char *range)
581 struct fragment * seg = av_mallocz(sizeof(struct fragment));
588 char *str_end_offset;
589 char *str_offset = av_strtok(range, "-", &str_end_offset);
590 seg->url_offset = strtoll(str_offset, NULL, 10);
591 seg->size = strtoll(str_end_offset, NULL, 10) - seg->url_offset + 1;
597 static int parse_manifest_segmenturlnode(AVFormatContext *s, struct representation *rep,
598 xmlNodePtr fragmenturl_node,
599 xmlNodePtr *baseurl_nodes,
601 char *rep_bandwidth_val)
603 DASHContext *c = s->priv_data;
604 char *initialization_val = NULL;
605 char *media_val = NULL;
606 char *range_val = NULL;
607 int max_url_size = c ? c->max_url_size: MAX_URL_SIZE;
610 if (!av_strcasecmp(fragmenturl_node->name, (const char *)"Initialization")) {
611 initialization_val = xmlGetProp(fragmenturl_node, "sourceURL");
612 range_val = xmlGetProp(fragmenturl_node, "range");
613 if (initialization_val || range_val) {
614 free_fragment(&rep->init_section);
615 rep->init_section = get_Fragment(range_val);
617 if (!rep->init_section) {
618 xmlFree(initialization_val);
619 return AVERROR(ENOMEM);
621 rep->init_section->url = get_content_url(baseurl_nodes, 4,
626 xmlFree(initialization_val);
627 if (!rep->init_section->url) {
628 av_freep(&rep->init_section);
629 return AVERROR(ENOMEM);
632 } else if (!av_strcasecmp(fragmenturl_node->name, (const char *)"SegmentURL")) {
633 media_val = xmlGetProp(fragmenturl_node, "media");
634 range_val = xmlGetProp(fragmenturl_node, "mediaRange");
635 if (media_val || range_val) {
636 struct fragment *seg = get_Fragment(range_val);
640 return AVERROR(ENOMEM);
642 seg->url = get_content_url(baseurl_nodes, 4,
650 return AVERROR(ENOMEM);
652 err = av_dynarray_add_nofree(&rep->fragments, &rep->n_fragments, seg);
663 static int parse_manifest_segmenttimeline(AVFormatContext *s, struct representation *rep,
664 xmlNodePtr fragment_timeline_node)
666 xmlAttrPtr attr = NULL;
670 if (!av_strcasecmp(fragment_timeline_node->name, (const char *)"S")) {
671 struct timeline *tml = av_mallocz(sizeof(struct timeline));
673 return AVERROR(ENOMEM);
675 attr = fragment_timeline_node->properties;
677 val = xmlGetProp(fragment_timeline_node, attr->name);
680 av_log(s, AV_LOG_WARNING, "parse_manifest_segmenttimeline attr->name = %s val is NULL\n", attr->name);
684 if (!av_strcasecmp(attr->name, (const char *)"t")) {
685 tml->starttime = (int64_t)strtoll(val, NULL, 10);
686 } else if (!av_strcasecmp(attr->name, (const char *)"r")) {
687 tml->repeat =(int64_t) strtoll(val, NULL, 10);
688 } else if (!av_strcasecmp(attr->name, (const char *)"d")) {
689 tml->duration = (int64_t)strtoll(val, NULL, 10);
694 err = av_dynarray_add_nofree(&rep->timelines, &rep->n_timelines, tml);
704 static int resolve_content_path(AVFormatContext *s, const char *url, int *max_url_size, xmlNodePtr *baseurl_nodes, int n_baseurl_nodes)
706 char *tmp_str = NULL;
708 char *mpdName = NULL;
709 xmlNodePtr node = NULL;
710 char *baseurl = NULL;
711 char *root_url = NULL;
721 int tmp_max_url_size = strlen(url);
723 for (i = n_baseurl_nodes-1; i >= 0 ; i--) {
724 text = xmlNodeGetContent(baseurl_nodes[i]);
727 tmp_max_url_size += strlen(text);
735 tmp_max_url_size = aligned(tmp_max_url_size);
736 text = av_mallocz(tmp_max_url_size);
738 updated = AVERROR(ENOMEM);
741 av_strlcpy(text, url, strlen(url)+1);
743 while (mpdName = av_strtok(tmp, "/", &tmp)) {
744 size = strlen(mpdName);
748 path = av_mallocz(tmp_max_url_size);
749 tmp_str = av_mallocz(tmp_max_url_size);
750 if (!tmp_str || !path) {
751 updated = AVERROR(ENOMEM);
755 av_strlcpy (path, url, strlen(url) - size + 1);
756 for (rootId = n_baseurl_nodes - 1; rootId > 0; rootId --) {
757 if (!(node = baseurl_nodes[rootId])) {
760 text = xmlNodeGetContent(node);
768 node = baseurl_nodes[rootId];
769 baseurl = xmlNodeGetContent(node);
770 root_url = (av_strcasecmp(baseurl, "")) ? baseurl : path;
772 xmlNodeSetContent(node, root_url);
776 size = strlen(root_url);
777 isRootHttp = ishttp(root_url);
779 if (root_url[size - 1] != token) {
780 av_strlcat(root_url, "/", size + 2);
784 for (i = 0; i < n_baseurl_nodes; ++i) {
788 text = xmlNodeGetContent(baseurl_nodes[i]);
789 if (text && !av_strstart(text, "/", NULL)) {
790 memset(tmp_str, 0, strlen(tmp_str));
791 if (!ishttp(text) && isRootHttp) {
792 av_strlcpy(tmp_str, root_url, size + 1);
794 start = (text[0] == token);
795 if (start && av_stristr(tmp_str, text)) {
797 if (!av_strncasecmp(tmp_str, "http://", 7)) {
799 } else if (!av_strncasecmp(tmp_str, "https://", 8)) {
803 memset(p + 1, 0, strlen(p));
805 av_strlcat(tmp_str, text + start, tmp_max_url_size);
806 xmlNodeSetContent(baseurl_nodes[i], tmp_str);
813 if (tmp_max_url_size > *max_url_size) {
814 *max_url_size = tmp_max_url_size;
823 static int parse_manifest_representation(AVFormatContext *s, const char *url,
825 xmlNodePtr adaptionset_node,
826 xmlNodePtr mpd_baseurl_node,
827 xmlNodePtr period_baseurl_node,
828 xmlNodePtr period_segmenttemplate_node,
829 xmlNodePtr period_segmentlist_node,
830 xmlNodePtr fragment_template_node,
831 xmlNodePtr content_component_node,
832 xmlNodePtr adaptionset_baseurl_node,
833 xmlNodePtr adaptionset_segmentlist_node,
834 xmlNodePtr adaptionset_supplementalproperty_node)
837 DASHContext *c = s->priv_data;
838 struct representation *rep = NULL;
839 struct fragment *seg = NULL;
840 xmlNodePtr representation_segmenttemplate_node = NULL;
841 xmlNodePtr representation_baseurl_node = NULL;
842 xmlNodePtr representation_segmentlist_node = NULL;
843 xmlNodePtr segmentlists_tab[3];
844 xmlNodePtr fragment_timeline_node = NULL;
845 xmlNodePtr fragment_templates_tab[5];
846 char *duration_val = NULL;
847 char *presentation_timeoffset_val = NULL;
848 char *startnumber_val = NULL;
849 char *timescale_val = NULL;
850 char *initialization_val = NULL;
851 char *media_val = NULL;
853 xmlNodePtr baseurl_nodes[4];
854 xmlNodePtr representation_node = node;
855 char *rep_id_val = xmlGetProp(representation_node, "id");
856 char *rep_bandwidth_val = xmlGetProp(representation_node, "bandwidth");
857 char *rep_framerate_val = xmlGetProp(representation_node, "frameRate");
858 enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
860 // try get information from representation
861 if (type == AVMEDIA_TYPE_UNKNOWN)
862 type = get_content_type(representation_node);
863 // try get information from contentComponen
864 if (type == AVMEDIA_TYPE_UNKNOWN)
865 type = get_content_type(content_component_node);
866 // try get information from adaption set
867 if (type == AVMEDIA_TYPE_UNKNOWN)
868 type = get_content_type(adaptionset_node);
869 if (type == AVMEDIA_TYPE_UNKNOWN) {
870 av_log(s, AV_LOG_VERBOSE, "Parsing '%s' - skipp not supported representation type\n", url);
871 } else if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO || type == AVMEDIA_TYPE_SUBTITLE) {
872 // convert selected representation to our internal struct
873 rep = av_mallocz(sizeof(struct representation));
875 ret = AVERROR(ENOMEM);
878 if (c->adaptionset_lang) {
879 rep->lang = av_strdup(c->adaptionset_lang);
881 av_log(s, AV_LOG_ERROR, "alloc language memory failure\n");
883 ret = AVERROR(ENOMEM);
888 representation_segmenttemplate_node = find_child_node_by_name(representation_node, "SegmentTemplate");
889 representation_baseurl_node = find_child_node_by_name(representation_node, "BaseURL");
890 representation_segmentlist_node = find_child_node_by_name(representation_node, "SegmentList");
892 baseurl_nodes[0] = mpd_baseurl_node;
893 baseurl_nodes[1] = period_baseurl_node;
894 baseurl_nodes[2] = adaptionset_baseurl_node;
895 baseurl_nodes[3] = representation_baseurl_node;
897 ret = resolve_content_path(s, url, &c->max_url_size, baseurl_nodes, 4);
898 c->max_url_size = aligned(c->max_url_size
899 + (rep_id_val ? strlen(rep_id_val) : 0)
900 + (rep_bandwidth_val ? strlen(rep_bandwidth_val) : 0));
901 if (ret == AVERROR(ENOMEM) || ret == 0)
903 if (representation_segmenttemplate_node || fragment_template_node || period_segmenttemplate_node) {
904 fragment_timeline_node = NULL;
905 fragment_templates_tab[0] = representation_segmenttemplate_node;
906 fragment_templates_tab[1] = adaptionset_segmentlist_node;
907 fragment_templates_tab[2] = fragment_template_node;
908 fragment_templates_tab[3] = period_segmenttemplate_node;
909 fragment_templates_tab[4] = period_segmentlist_node;
911 initialization_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "initialization");
912 if (initialization_val) {
913 rep->init_section = av_mallocz(sizeof(struct fragment));
914 if (!rep->init_section) {
915 xmlFree(initialization_val);
918 c->max_url_size = aligned(c->max_url_size + strlen(initialization_val));
919 rep->init_section->url = get_content_url(baseurl_nodes, 4, c->max_url_size, rep_id_val, rep_bandwidth_val, initialization_val);
920 xmlFree(initialization_val);
921 if (!rep->init_section->url)
923 rep->init_section->size = -1;
925 media_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "media");
927 c->max_url_size = aligned(c->max_url_size + strlen(media_val));
928 rep->url_template = get_content_url(baseurl_nodes, 4, c->max_url_size, rep_id_val, rep_bandwidth_val, media_val);
931 presentation_timeoffset_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "presentationTimeOffset");
932 if (presentation_timeoffset_val) {
933 rep->presentation_timeoffset = (int64_t) strtoll(presentation_timeoffset_val, NULL, 10);
934 av_log(s, AV_LOG_TRACE, "rep->presentation_timeoffset = [%"PRId64"]\n", rep->presentation_timeoffset);
935 xmlFree(presentation_timeoffset_val);
937 duration_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "duration");
939 rep->fragment_duration = (int64_t) strtoll(duration_val, NULL, 10);
940 av_log(s, AV_LOG_TRACE, "rep->fragment_duration = [%"PRId64"]\n", rep->fragment_duration);
941 xmlFree(duration_val);
943 timescale_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "timescale");
945 rep->fragment_timescale = (int64_t) strtoll(timescale_val, NULL, 10);
946 av_log(s, AV_LOG_TRACE, "rep->fragment_timescale = [%"PRId64"]\n", rep->fragment_timescale);
947 xmlFree(timescale_val);
949 startnumber_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "startNumber");
950 if (startnumber_val) {
951 rep->start_number = rep->first_seq_no = (int64_t) strtoll(startnumber_val, NULL, 10);
952 av_log(s, AV_LOG_TRACE, "rep->first_seq_no = [%"PRId64"]\n", rep->first_seq_no);
953 xmlFree(startnumber_val);
955 if (adaptionset_supplementalproperty_node) {
956 if (!av_strcasecmp(xmlGetProp(adaptionset_supplementalproperty_node,"schemeIdUri"), "http://dashif.org/guidelines/last-segment-number")) {
957 val = xmlGetProp(adaptionset_supplementalproperty_node,"value");
959 av_log(s, AV_LOG_ERROR, "Missing value attribute in adaptionset_supplementalproperty_node\n");
961 rep->last_seq_no =(int64_t) strtoll(val, NULL, 10) - 1;
967 fragment_timeline_node = find_child_node_by_name(representation_segmenttemplate_node, "SegmentTimeline");
969 if (!fragment_timeline_node)
970 fragment_timeline_node = find_child_node_by_name(fragment_template_node, "SegmentTimeline");
971 if (!fragment_timeline_node)
972 fragment_timeline_node = find_child_node_by_name(adaptionset_segmentlist_node, "SegmentTimeline");
973 if (!fragment_timeline_node)
974 fragment_timeline_node = find_child_node_by_name(period_segmentlist_node, "SegmentTimeline");
975 if (fragment_timeline_node) {
976 fragment_timeline_node = xmlFirstElementChild(fragment_timeline_node);
977 while (fragment_timeline_node) {
978 ret = parse_manifest_segmenttimeline(s, rep, fragment_timeline_node);
981 fragment_timeline_node = xmlNextElementSibling(fragment_timeline_node);
984 } else if (representation_baseurl_node && !representation_segmentlist_node) {
985 seg = av_mallocz(sizeof(struct fragment));
988 ret = av_dynarray_add_nofree(&rep->fragments, &rep->n_fragments, seg);
993 seg->url = get_content_url(baseurl_nodes, 4, c->max_url_size, rep_id_val, rep_bandwidth_val, NULL);
997 } else if (representation_segmentlist_node) {
998 // TODO: https://www.brendanlong.com/the-structure-of-an-mpeg-dash-mpd.html
999 // http://www-itec.uni-klu.ac.at/dash/ddash/mpdGenerator.php?fragmentlength=15&type=full
1000 xmlNodePtr fragmenturl_node = NULL;
1001 segmentlists_tab[0] = representation_segmentlist_node;
1002 segmentlists_tab[1] = adaptionset_segmentlist_node;
1003 segmentlists_tab[2] = period_segmentlist_node;
1005 duration_val = get_val_from_nodes_tab(segmentlists_tab, 3, "duration");
1006 timescale_val = get_val_from_nodes_tab(segmentlists_tab, 3, "timescale");
1007 startnumber_val = get_val_from_nodes_tab(segmentlists_tab, 3, "startNumber");
1009 rep->fragment_duration = (int64_t) strtoll(duration_val, NULL, 10);
1010 av_log(s, AV_LOG_TRACE, "rep->fragment_duration = [%"PRId64"]\n", rep->fragment_duration);
1011 xmlFree(duration_val);
1013 if (timescale_val) {
1014 rep->fragment_timescale = (int64_t) strtoll(timescale_val, NULL, 10);
1015 av_log(s, AV_LOG_TRACE, "rep->fragment_timescale = [%"PRId64"]\n", rep->fragment_timescale);
1016 xmlFree(timescale_val);
1018 if (startnumber_val) {
1019 rep->start_number = rep->first_seq_no = (int64_t) strtoll(startnumber_val, NULL, 10);
1020 av_log(s, AV_LOG_TRACE, "rep->first_seq_no = [%"PRId64"]\n", rep->first_seq_no);
1021 xmlFree(startnumber_val);
1024 fragmenturl_node = xmlFirstElementChild(representation_segmentlist_node);
1025 while (fragmenturl_node) {
1026 ret = parse_manifest_segmenturlnode(s, rep, fragmenturl_node,
1032 fragmenturl_node = xmlNextElementSibling(fragmenturl_node);
1035 fragment_timeline_node = find_child_node_by_name(adaptionset_segmentlist_node, "SegmentTimeline");
1036 if (!fragment_timeline_node)
1037 fragment_timeline_node = find_child_node_by_name(period_segmentlist_node, "SegmentTimeline");
1038 if (fragment_timeline_node) {
1039 fragment_timeline_node = xmlFirstElementChild(fragment_timeline_node);
1040 while (fragment_timeline_node) {
1041 ret = parse_manifest_segmenttimeline(s, rep, fragment_timeline_node);
1044 fragment_timeline_node = xmlNextElementSibling(fragment_timeline_node);
1048 av_log(s, AV_LOG_ERROR, "Unknown format of Representation node id[%s] \n", (const char *)rep_id_val);
1053 if (rep->fragment_duration > 0 && !rep->fragment_timescale)
1054 rep->fragment_timescale = 1;
1055 rep->bandwidth = rep_bandwidth_val ? atoi(rep_bandwidth_val) : 0;
1056 strncpy(rep->id, rep_id_val ? rep_id_val : "", sizeof(rep->id));
1057 rep->framerate = av_make_q(0, 0);
1058 if (type == AVMEDIA_TYPE_VIDEO && rep_framerate_val) {
1059 ret = av_parse_video_rate(&rep->framerate, rep_framerate_val);
1061 av_log(s, AV_LOG_VERBOSE, "Ignoring invalid frame rate '%s'\n", rep_framerate_val);
1065 case AVMEDIA_TYPE_VIDEO:
1066 ret = av_dynarray_add_nofree(&c->videos, &c->n_videos, rep);
1068 case AVMEDIA_TYPE_AUDIO:
1069 ret = av_dynarray_add_nofree(&c->audios, &c->n_audios, rep);
1071 case AVMEDIA_TYPE_SUBTITLE:
1072 ret = av_dynarray_add_nofree(&c->subtitles, &c->n_subtitles, rep);
1075 av_log(s, AV_LOG_WARNING, "Unsupported the stream type %d\n", type);
1085 xmlFree(rep_id_val);
1086 if (rep_bandwidth_val)
1087 xmlFree(rep_bandwidth_val);
1088 if (rep_framerate_val)
1089 xmlFree(rep_framerate_val);
1093 ret = AVERROR(ENOMEM);
1095 free_representation(rep);
1099 static int parse_manifest_adaptationset_attr(AVFormatContext *s, xmlNodePtr adaptionset_node)
1101 DASHContext *c = s->priv_data;
1103 if (!adaptionset_node) {
1104 av_log(s, AV_LOG_WARNING, "Cannot get AdaptionSet\n");
1105 return AVERROR(EINVAL);
1107 c->adaptionset_lang = xmlGetProp(adaptionset_node, "lang");
1112 static int parse_manifest_adaptationset(AVFormatContext *s, const char *url,
1113 xmlNodePtr adaptionset_node,
1114 xmlNodePtr mpd_baseurl_node,
1115 xmlNodePtr period_baseurl_node,
1116 xmlNodePtr period_segmenttemplate_node,
1117 xmlNodePtr period_segmentlist_node)
1120 DASHContext *c = s->priv_data;
1121 xmlNodePtr fragment_template_node = NULL;
1122 xmlNodePtr content_component_node = NULL;
1123 xmlNodePtr adaptionset_baseurl_node = NULL;
1124 xmlNodePtr adaptionset_segmentlist_node = NULL;
1125 xmlNodePtr adaptionset_supplementalproperty_node = NULL;
1126 xmlNodePtr node = NULL;
1128 ret = parse_manifest_adaptationset_attr(s, adaptionset_node);
1132 node = xmlFirstElementChild(adaptionset_node);
1134 if (!av_strcasecmp(node->name, (const char *)"SegmentTemplate")) {
1135 fragment_template_node = node;
1136 } else if (!av_strcasecmp(node->name, (const char *)"ContentComponent")) {
1137 content_component_node = node;
1138 } else if (!av_strcasecmp(node->name, (const char *)"BaseURL")) {
1139 adaptionset_baseurl_node = node;
1140 } else if (!av_strcasecmp(node->name, (const char *)"SegmentList")) {
1141 adaptionset_segmentlist_node = node;
1142 } else if (!av_strcasecmp(node->name, (const char *)"SupplementalProperty")) {
1143 adaptionset_supplementalproperty_node = node;
1144 } else if (!av_strcasecmp(node->name, (const char *)"Representation")) {
1145 ret = parse_manifest_representation(s, url, node,
1148 period_baseurl_node,
1149 period_segmenttemplate_node,
1150 period_segmentlist_node,
1151 fragment_template_node,
1152 content_component_node,
1153 adaptionset_baseurl_node,
1154 adaptionset_segmentlist_node,
1155 adaptionset_supplementalproperty_node);
1159 node = xmlNextElementSibling(node);
1163 av_freep(&c->adaptionset_lang);
1167 static int parse_programinformation(AVFormatContext *s, xmlNodePtr node)
1169 xmlChar *val = NULL;
1171 node = xmlFirstElementChild(node);
1173 if (!av_strcasecmp(node->name, "Title")) {
1174 val = xmlNodeGetContent(node);
1176 av_dict_set(&s->metadata, "Title", val, 0);
1178 } else if (!av_strcasecmp(node->name, "Source")) {
1179 val = xmlNodeGetContent(node);
1181 av_dict_set(&s->metadata, "Source", val, 0);
1183 } else if (!av_strcasecmp(node->name, "Copyright")) {
1184 val = xmlNodeGetContent(node);
1186 av_dict_set(&s->metadata, "Copyright", val, 0);
1189 node = xmlNextElementSibling(node);
1196 static int parse_manifest(AVFormatContext *s, const char *url, AVIOContext *in)
1198 DASHContext *c = s->priv_data;
1201 uint8_t *new_url = NULL;
1202 int64_t filesize = 0;
1204 AVDictionary *opts = NULL;
1206 xmlNodePtr root_element = NULL;
1207 xmlNodePtr node = NULL;
1208 xmlNodePtr period_node = NULL;
1209 xmlNodePtr tmp_node = NULL;
1210 xmlNodePtr mpd_baseurl_node = NULL;
1211 xmlNodePtr period_baseurl_node = NULL;
1212 xmlNodePtr period_segmenttemplate_node = NULL;
1213 xmlNodePtr period_segmentlist_node = NULL;
1214 xmlNodePtr adaptionset_node = NULL;
1215 xmlAttrPtr attr = NULL;
1217 uint32_t period_duration_sec = 0;
1218 uint32_t period_start_sec = 0;
1223 av_dict_copy(&opts, c->avio_opts, 0);
1224 ret = avio_open2(&in, url, AVIO_FLAG_READ, c->interrupt_callback, &opts);
1225 av_dict_free(&opts);
1230 if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >= 0) {
1231 c->base_url = av_strdup(new_url);
1233 c->base_url = av_strdup(url);
1236 filesize = avio_size(in);
1237 filesize = filesize > 0 ? filesize : DEFAULT_MANIFEST_SIZE;
1239 if (filesize > MAX_BPRINT_READ_SIZE) {
1240 av_log(s, AV_LOG_ERROR, "Manifest too large: %"PRId64"\n", filesize);
1241 return AVERROR_INVALIDDATA;
1244 av_bprint_init(&buf, filesize + 1, AV_BPRINT_SIZE_UNLIMITED);
1246 if ((ret = avio_read_to_bprint(in, &buf, MAX_BPRINT_READ_SIZE)) < 0 ||
1248 (filesize = buf.len) == 0) {
1249 av_log(s, AV_LOG_ERROR, "Unable to read to manifest '%s'\n", url);
1251 ret = AVERROR_INVALIDDATA;
1255 doc = xmlReadMemory(buf.str, filesize, c->base_url, NULL, 0);
1256 root_element = xmlDocGetRootElement(doc);
1257 node = root_element;
1260 ret = AVERROR_INVALIDDATA;
1261 av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing root node\n", url);
1265 if (node->type != XML_ELEMENT_NODE ||
1266 av_strcasecmp(node->name, (const char *)"MPD")) {
1267 ret = AVERROR_INVALIDDATA;
1268 av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - wrong root node name[%s] type[%d]\n", url, node->name, (int)node->type);
1272 val = xmlGetProp(node, "type");
1274 av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing type attrib\n", url);
1275 ret = AVERROR_INVALIDDATA;
1278 if (!av_strcasecmp(val, (const char *)"dynamic"))
1282 attr = node->properties;
1284 val = xmlGetProp(node, attr->name);
1286 if (!av_strcasecmp(attr->name, (const char *)"availabilityStartTime")) {
1287 c->availability_start_time = get_utc_date_time_insec(s, (const char *)val);
1288 av_log(s, AV_LOG_TRACE, "c->availability_start_time = [%"PRId64"]\n", c->availability_start_time);
1289 } else if (!av_strcasecmp(attr->name, (const char *)"availabilityEndTime")) {
1290 c->availability_end_time = get_utc_date_time_insec(s, (const char *)val);
1291 av_log(s, AV_LOG_TRACE, "c->availability_end_time = [%"PRId64"]\n", c->availability_end_time);
1292 } else if (!av_strcasecmp(attr->name, (const char *)"publishTime")) {
1293 c->publish_time = get_utc_date_time_insec(s, (const char *)val);
1294 av_log(s, AV_LOG_TRACE, "c->publish_time = [%"PRId64"]\n", c->publish_time);
1295 } else if (!av_strcasecmp(attr->name, (const char *)"minimumUpdatePeriod")) {
1296 c->minimum_update_period = get_duration_insec(s, (const char *)val);
1297 av_log(s, AV_LOG_TRACE, "c->minimum_update_period = [%"PRId64"]\n", c->minimum_update_period);
1298 } else if (!av_strcasecmp(attr->name, (const char *)"timeShiftBufferDepth")) {
1299 c->time_shift_buffer_depth = get_duration_insec(s, (const char *)val);
1300 av_log(s, AV_LOG_TRACE, "c->time_shift_buffer_depth = [%"PRId64"]\n", c->time_shift_buffer_depth);
1301 } else if (!av_strcasecmp(attr->name, (const char *)"minBufferTime")) {
1302 c->min_buffer_time = get_duration_insec(s, (const char *)val);
1303 av_log(s, AV_LOG_TRACE, "c->min_buffer_time = [%"PRId64"]\n", c->min_buffer_time);
1304 } else if (!av_strcasecmp(attr->name, (const char *)"suggestedPresentationDelay")) {
1305 c->suggested_presentation_delay = get_duration_insec(s, (const char *)val);
1306 av_log(s, AV_LOG_TRACE, "c->suggested_presentation_delay = [%"PRId64"]\n", c->suggested_presentation_delay);
1307 } else if (!av_strcasecmp(attr->name, (const char *)"mediaPresentationDuration")) {
1308 c->media_presentation_duration = get_duration_insec(s, (const char *)val);
1309 av_log(s, AV_LOG_TRACE, "c->media_presentation_duration = [%"PRId64"]\n", c->media_presentation_duration);
1315 tmp_node = find_child_node_by_name(node, "BaseURL");
1317 mpd_baseurl_node = xmlCopyNode(tmp_node,1);
1319 mpd_baseurl_node = xmlNewNode(NULL, "BaseURL");
1322 // at now we can handle only one period, with the longest duration
1323 node = xmlFirstElementChild(node);
1325 if (!av_strcasecmp(node->name, (const char *)"Period")) {
1326 period_duration_sec = 0;
1327 period_start_sec = 0;
1328 attr = node->properties;
1330 val = xmlGetProp(node, attr->name);
1331 if (!av_strcasecmp(attr->name, (const char *)"duration")) {
1332 period_duration_sec = get_duration_insec(s, (const char *)val);
1333 } else if (!av_strcasecmp(attr->name, (const char *)"start")) {
1334 period_start_sec = get_duration_insec(s, (const char *)val);
1339 if ((period_duration_sec) >= (c->period_duration)) {
1341 c->period_duration = period_duration_sec;
1342 c->period_start = period_start_sec;
1343 if (c->period_start > 0)
1344 c->media_presentation_duration = c->period_duration;
1346 } else if (!av_strcasecmp(node->name, "ProgramInformation")) {
1347 parse_programinformation(s, node);
1349 node = xmlNextElementSibling(node);
1352 av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing Period node\n", url);
1353 ret = AVERROR_INVALIDDATA;
1357 adaptionset_node = xmlFirstElementChild(period_node);
1358 while (adaptionset_node) {
1359 if (!av_strcasecmp(adaptionset_node->name, (const char *)"BaseURL")) {
1360 period_baseurl_node = adaptionset_node;
1361 } else if (!av_strcasecmp(adaptionset_node->name, (const char *)"SegmentTemplate")) {
1362 period_segmenttemplate_node = adaptionset_node;
1363 } else if (!av_strcasecmp(adaptionset_node->name, (const char *)"SegmentList")) {
1364 period_segmentlist_node = adaptionset_node;
1365 } else if (!av_strcasecmp(adaptionset_node->name, (const char *)"AdaptationSet")) {
1366 parse_manifest_adaptationset(s, url, adaptionset_node, mpd_baseurl_node, period_baseurl_node, period_segmenttemplate_node, period_segmentlist_node);
1368 adaptionset_node = xmlNextElementSibling(adaptionset_node);
1371 /*free the document */
1374 xmlFreeNode(mpd_baseurl_node);
1378 av_bprint_finalize(&buf, NULL);
1385 static int64_t calc_cur_seg_no(AVFormatContext *s, struct representation *pls)
1387 DASHContext *c = s->priv_data;
1389 int64_t start_time_offset = 0;
1392 if (pls->n_fragments) {
1393 av_log(s, AV_LOG_TRACE, "in n_fragments mode\n");
1394 num = pls->first_seq_no;
1395 } else if (pls->n_timelines) {
1396 av_log(s, AV_LOG_TRACE, "in n_timelines mode\n");
1397 start_time_offset = get_segment_start_time_based_on_timeline(pls, 0xFFFFFFFF) - 60 * pls->fragment_timescale; // 60 seconds before end
1398 num = calc_next_seg_no_from_timelines(pls, start_time_offset);
1400 num = pls->first_seq_no;
1402 num += pls->first_seq_no;
1403 } else if (pls->fragment_duration){
1404 av_log(s, AV_LOG_TRACE, "in fragment_duration mode fragment_timescale = %"PRId64", presentation_timeoffset = %"PRId64"\n", pls->fragment_timescale, pls->presentation_timeoffset);
1405 if (pls->presentation_timeoffset) {
1406 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;
1407 } else if (c->publish_time > 0 && !c->availability_start_time) {
1408 if (c->min_buffer_time) {
1409 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;
1411 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;
1414 num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time) - c->suggested_presentation_delay) * pls->fragment_timescale) / pls->fragment_duration;
1418 num = pls->first_seq_no;
1423 static int64_t calc_min_seg_no(AVFormatContext *s, struct representation *pls)
1425 DASHContext *c = s->priv_data;
1428 if (c->is_live && pls->fragment_duration) {
1429 av_log(s, AV_LOG_TRACE, "in live mode\n");
1430 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;
1432 num = pls->first_seq_no;
1437 static int64_t calc_max_seg_no(struct representation *pls, DASHContext *c)
1441 if (pls->n_fragments) {
1442 num = pls->first_seq_no + pls->n_fragments - 1;
1443 } else if (pls->n_timelines) {
1445 num = pls->first_seq_no + pls->n_timelines - 1;
1446 for (i = 0; i < pls->n_timelines; i++) {
1447 if (pls->timelines[i]->repeat == -1) {
1448 int length_of_each_segment = pls->timelines[i]->duration / pls->fragment_timescale;
1449 num = c->period_duration / length_of_each_segment;
1451 num += pls->timelines[i]->repeat;
1454 } else if (c->is_live && pls->fragment_duration) {
1455 num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time)) * pls->fragment_timescale) / pls->fragment_duration;
1456 } else if (pls->fragment_duration) {
1457 num = pls->first_seq_no + (c->media_presentation_duration * pls->fragment_timescale) / pls->fragment_duration;
1463 static void move_timelines(struct representation *rep_src, struct representation *rep_dest, DASHContext *c)
1465 if (rep_dest && rep_src ) {
1466 free_timelines_list(rep_dest);
1467 rep_dest->timelines = rep_src->timelines;
1468 rep_dest->n_timelines = rep_src->n_timelines;
1469 rep_dest->first_seq_no = rep_src->first_seq_no;
1470 rep_dest->last_seq_no = calc_max_seg_no(rep_dest, c);
1471 rep_src->timelines = NULL;
1472 rep_src->n_timelines = 0;
1473 rep_dest->cur_seq_no = rep_src->cur_seq_no;
1477 static void move_segments(struct representation *rep_src, struct representation *rep_dest, DASHContext *c)
1479 if (rep_dest && rep_src ) {
1480 free_fragment_list(rep_dest);
1481 if (rep_src->start_number > (rep_dest->start_number + rep_dest->n_fragments))
1482 rep_dest->cur_seq_no = 0;
1484 rep_dest->cur_seq_no += rep_src->start_number - rep_dest->start_number;
1485 rep_dest->fragments = rep_src->fragments;
1486 rep_dest->n_fragments = rep_src->n_fragments;
1487 rep_dest->parent = rep_src->parent;
1488 rep_dest->last_seq_no = calc_max_seg_no(rep_dest, c);
1489 rep_src->fragments = NULL;
1490 rep_src->n_fragments = 0;
1495 static int refresh_manifest(AVFormatContext *s)
1498 DASHContext *c = s->priv_data;
1499 // save current context
1500 int n_videos = c->n_videos;
1501 struct representation **videos = c->videos;
1502 int n_audios = c->n_audios;
1503 struct representation **audios = c->audios;
1504 int n_subtitles = c->n_subtitles;
1505 struct representation **subtitles = c->subtitles;
1506 char *base_url = c->base_url;
1514 c->subtitles = NULL;
1515 ret = parse_manifest(s, s->url, NULL);
1519 if (c->n_videos != n_videos) {
1520 av_log(c, AV_LOG_ERROR,
1521 "new manifest has mismatched no. of video representations, %d -> %d\n",
1522 n_videos, c->n_videos);
1523 return AVERROR_INVALIDDATA;
1525 if (c->n_audios != n_audios) {
1526 av_log(c, AV_LOG_ERROR,
1527 "new manifest has mismatched no. of audio representations, %d -> %d\n",
1528 n_audios, c->n_audios);
1529 return AVERROR_INVALIDDATA;
1531 if (c->n_subtitles != n_subtitles) {
1532 av_log(c, AV_LOG_ERROR,
1533 "new manifest has mismatched no. of subtitles representations, %d -> %d\n",
1534 n_subtitles, c->n_subtitles);
1535 return AVERROR_INVALIDDATA;
1538 for (i = 0; i < n_videos; i++) {
1539 struct representation *cur_video = videos[i];
1540 struct representation *ccur_video = c->videos[i];
1541 if (cur_video->timelines) {
1542 // calc current time
1543 int64_t currentTime = get_segment_start_time_based_on_timeline(cur_video, cur_video->cur_seq_no) / cur_video->fragment_timescale;
1545 ccur_video->cur_seq_no = calc_next_seg_no_from_timelines(ccur_video, currentTime * cur_video->fragment_timescale - 1);
1546 if (ccur_video->cur_seq_no >= 0) {
1547 move_timelines(ccur_video, cur_video, c);
1550 if (cur_video->fragments) {
1551 move_segments(ccur_video, cur_video, c);
1554 for (i = 0; i < n_audios; i++) {
1555 struct representation *cur_audio = audios[i];
1556 struct representation *ccur_audio = c->audios[i];
1557 if (cur_audio->timelines) {
1558 // calc current time
1559 int64_t currentTime = get_segment_start_time_based_on_timeline(cur_audio, cur_audio->cur_seq_no) / cur_audio->fragment_timescale;
1561 ccur_audio->cur_seq_no = calc_next_seg_no_from_timelines(ccur_audio, currentTime * cur_audio->fragment_timescale - 1);
1562 if (ccur_audio->cur_seq_no >= 0) {
1563 move_timelines(ccur_audio, cur_audio, c);
1566 if (cur_audio->fragments) {
1567 move_segments(ccur_audio, cur_audio, c);
1576 c->base_url = base_url;
1579 free_subtitle_list(c);
1585 c->n_subtitles = n_subtitles;
1586 c->subtitles = subtitles;
1587 c->n_audios = n_audios;
1589 c->n_videos = n_videos;
1594 static struct fragment *get_current_fragment(struct representation *pls)
1596 int64_t min_seq_no = 0;
1597 int64_t max_seq_no = 0;
1598 struct fragment *seg = NULL;
1599 struct fragment *seg_ptr = NULL;
1600 DASHContext *c = pls->parent->priv_data;
1602 while (( !ff_check_interrupt(c->interrupt_callback)&& pls->n_fragments > 0)) {
1603 if (pls->cur_seq_no < pls->n_fragments) {
1604 seg_ptr = pls->fragments[pls->cur_seq_no];
1605 seg = av_mallocz(sizeof(struct fragment));
1609 seg->url = av_strdup(seg_ptr->url);
1614 seg->size = seg_ptr->size;
1615 seg->url_offset = seg_ptr->url_offset;
1617 } else if (c->is_live) {
1618 refresh_manifest(pls->parent);
1624 min_seq_no = calc_min_seg_no(pls->parent, pls);
1625 max_seq_no = calc_max_seg_no(pls, c);
1627 if (pls->timelines || pls->fragments) {
1628 refresh_manifest(pls->parent);
1630 if (pls->cur_seq_no <= min_seq_no) {
1631 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);
1632 pls->cur_seq_no = calc_cur_seg_no(pls->parent, pls);
1633 } else if (pls->cur_seq_no > max_seq_no) {
1634 av_log(pls->parent, AV_LOG_VERBOSE, "new fragment: min[%"PRId64"] max[%"PRId64"]\n", min_seq_no, max_seq_no);
1636 seg = av_mallocz(sizeof(struct fragment));
1640 } else if (pls->cur_seq_no <= pls->last_seq_no) {
1641 seg = av_mallocz(sizeof(struct fragment));
1647 char *tmpfilename= av_mallocz(c->max_url_size);
1651 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));
1652 seg->url = av_strireplace(pls->url_template, pls->url_template, tmpfilename);
1654 av_log(pls->parent, AV_LOG_WARNING, "Unable to resolve template url '%s', try to use origin template\n", pls->url_template);
1655 seg->url = av_strdup(pls->url_template);
1657 av_log(pls->parent, AV_LOG_ERROR, "Cannot resolve template url '%s'\n", pls->url_template);
1658 av_free(tmpfilename);
1662 av_free(tmpfilename);
1669 static int read_from_url(struct representation *pls, struct fragment *seg,
1670 uint8_t *buf, int buf_size)
1674 /* limit read if the fragment was only a part of a file */
1676 buf_size = FFMIN(buf_size, pls->cur_seg_size - pls->cur_seg_offset);
1678 ret = avio_read(pls->input, buf, buf_size);
1680 pls->cur_seg_offset += ret;
1685 static int open_input(DASHContext *c, struct representation *pls, struct fragment *seg)
1687 AVDictionary *opts = NULL;
1691 url = av_mallocz(c->max_url_size);
1693 ret = AVERROR(ENOMEM);
1697 if (seg->size >= 0) {
1698 /* try to restrict the HTTP request to the part we want
1699 * (if this is in fact a HTTP request) */
1700 av_dict_set_int(&opts, "offset", seg->url_offset, 0);
1701 av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
1704 ff_make_absolute_url(url, c->max_url_size, c->base_url, seg->url);
1705 av_log(pls->parent, AV_LOG_VERBOSE, "DASH request for url '%s', offset %"PRId64"\n",
1706 url, seg->url_offset);
1707 ret = open_url(pls->parent, &pls->input, url, &c->avio_opts, opts, NULL);
1711 av_dict_free(&opts);
1712 pls->cur_seg_offset = 0;
1713 pls->cur_seg_size = seg->size;
1717 static int update_init_section(struct representation *pls)
1719 static const int max_init_section_size = 1024 * 1024;
1720 DASHContext *c = pls->parent->priv_data;
1725 if (!pls->init_section || pls->init_sec_buf)
1728 ret = open_input(c, pls, pls->init_section);
1730 av_log(pls->parent, AV_LOG_WARNING,
1731 "Failed to open an initialization section\n");
1735 if (pls->init_section->size >= 0)
1736 sec_size = pls->init_section->size;
1737 else if ((urlsize = avio_size(pls->input)) >= 0)
1740 sec_size = max_init_section_size;
1742 av_log(pls->parent, AV_LOG_DEBUG,
1743 "Downloading an initialization section of size %"PRId64"\n",
1746 sec_size = FFMIN(sec_size, max_init_section_size);
1748 av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size);
1750 ret = read_from_url(pls, pls->init_section, pls->init_sec_buf,
1751 pls->init_sec_buf_size);
1752 ff_format_io_close(pls->parent, &pls->input);
1757 pls->init_sec_data_len = ret;
1758 pls->init_sec_buf_read_offset = 0;
1763 static int64_t seek_data(void *opaque, int64_t offset, int whence)
1765 struct representation *v = opaque;
1766 if (v->n_fragments && !v->init_sec_data_len) {
1767 return avio_seek(v->input, offset, whence);
1770 return AVERROR(ENOSYS);
1773 static int read_data(void *opaque, uint8_t *buf, int buf_size)
1776 struct representation *v = opaque;
1777 DASHContext *c = v->parent->priv_data;
1781 free_fragment(&v->cur_seg);
1782 v->cur_seg = get_current_fragment(v);
1788 /* load/update Media Initialization Section, if any */
1789 ret = update_init_section(v);
1793 ret = open_input(c, v, v->cur_seg);
1795 if (ff_check_interrupt(c->interrupt_callback)) {
1799 av_log(v->parent, AV_LOG_WARNING, "Failed to open fragment of playlist\n");
1805 if (v->init_sec_buf_read_offset < v->init_sec_data_len) {
1806 /* Push init section out first before first actual fragment */
1807 int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size);
1808 memcpy(buf, v->init_sec_buf, copy_size);
1809 v->init_sec_buf_read_offset += copy_size;
1814 /* check the v->cur_seg, if it is null, get current and double check if the new v->cur_seg*/
1816 v->cur_seg = get_current_fragment(v);
1822 ret = read_from_url(v, v->cur_seg, buf, buf_size);
1826 if (c->is_live || v->cur_seq_no < v->last_seq_no) {
1827 if (!v->is_restart_needed)
1829 v->is_restart_needed = 1;
1836 static int save_avio_options(AVFormatContext *s)
1838 DASHContext *c = s->priv_data;
1839 const char *opts[] = {
1840 "headers", "user_agent", "cookies", "http_proxy", "referer", "rw_timeout", "icy", NULL };
1841 const char **opt = opts;
1842 uint8_t *buf = NULL;
1846 if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN, &buf) >= 0) {
1847 if (buf[0] != '\0') {
1848 ret = av_dict_set(&c->avio_opts, *opt, buf, AV_DICT_DONT_STRDUP_VAL);
1861 static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url,
1862 int flags, AVDictionary **opts)
1864 av_log(s, AV_LOG_ERROR,
1865 "A DASH playlist item '%s' referred to an external file '%s'. "
1866 "Opening this file was forbidden for security reasons\n",
1868 return AVERROR(EPERM);
1871 static void close_demux_for_component(struct representation *pls)
1873 /* note: the internal buffer could have changed */
1874 av_freep(&pls->pb.buffer);
1875 memset(&pls->pb, 0x00, sizeof(AVIOContext));
1876 pls->ctx->pb = NULL;
1877 avformat_close_input(&pls->ctx);
1880 static int reopen_demux_for_component(AVFormatContext *s, struct representation *pls)
1882 DASHContext *c = s->priv_data;
1883 ff_const59 AVInputFormat *in_fmt = NULL;
1884 AVDictionary *in_fmt_opts = NULL;
1885 uint8_t *avio_ctx_buffer = NULL;
1889 close_demux_for_component(pls);
1892 if (ff_check_interrupt(&s->interrupt_callback)) {
1897 if (!(pls->ctx = avformat_alloc_context())) {
1898 ret = AVERROR(ENOMEM);
1902 avio_ctx_buffer = av_malloc(INITIAL_BUFFER_SIZE);
1903 if (!avio_ctx_buffer ) {
1904 ret = AVERROR(ENOMEM);
1905 avformat_free_context(pls->ctx);
1910 ffio_init_context(&pls->pb, avio_ctx_buffer , INITIAL_BUFFER_SIZE, 0, pls, read_data, NULL, NULL);
1912 ffio_init_context(&pls->pb, avio_ctx_buffer , INITIAL_BUFFER_SIZE, 0, pls, read_data, NULL, seek_data);
1914 pls->pb.seekable = 0;
1916 if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
1919 pls->ctx->flags = AVFMT_FLAG_CUSTOM_IO;
1920 pls->ctx->probesize = s->probesize > 0 ? s->probesize : 1024 * 4;
1921 pls->ctx->max_analyze_duration = s->max_analyze_duration > 0 ? s->max_analyze_duration : 4 * AV_TIME_BASE;
1922 pls->ctx->interrupt_callback = s->interrupt_callback;
1923 ret = av_probe_input_buffer(&pls->pb, &in_fmt, "", NULL, 0, 0);
1925 av_log(s, AV_LOG_ERROR, "Error when loading first fragment of playlist\n");
1926 avformat_free_context(pls->ctx);
1931 pls->ctx->pb = &pls->pb;
1932 pls->ctx->io_open = nested_io_open;
1934 // provide additional information from mpd if available
1935 ret = avformat_open_input(&pls->ctx, "", in_fmt, &in_fmt_opts); //pls->init_section->url
1936 av_dict_free(&in_fmt_opts);
1939 if (pls->n_fragments) {
1940 #if FF_API_R_FRAME_RATE
1941 if (pls->framerate.den) {
1942 for (i = 0; i < pls->ctx->nb_streams; i++)
1943 pls->ctx->streams[i]->r_frame_rate = pls->framerate;
1946 ret = avformat_find_stream_info(pls->ctx, NULL);
1955 static int open_demux_for_component(AVFormatContext *s, struct representation *pls)
1961 pls->cur_seq_no = calc_cur_seg_no(s, pls);
1963 if (!pls->last_seq_no) {
1964 pls->last_seq_no = calc_max_seg_no(pls, s->priv_data);
1967 ret = reopen_demux_for_component(s, pls);
1971 for (i = 0; i < pls->ctx->nb_streams; i++) {
1972 AVStream *st = avformat_new_stream(s, NULL);
1973 AVStream *ist = pls->ctx->streams[i];
1975 ret = AVERROR(ENOMEM);
1979 avcodec_parameters_copy(st->codecpar, ist->codecpar);
1980 avpriv_set_pts_info(st, ist->pts_wrap_bits, ist->time_base.num, ist->time_base.den);
1983 st->disposition = ist->disposition;
1986 for (int i = 0; i < ist->nb_side_data; i++) {
1987 const AVPacketSideData *sd_src = &ist->side_data[i];
1990 dst_data = av_stream_new_side_data(st, sd_src->type, sd_src->size);
1992 return AVERROR(ENOMEM);
1993 memcpy(dst_data, sd_src->data, sd_src->size);
2002 static int is_common_init_section_exist(struct representation **pls, int n_pls)
2004 struct fragment *first_init_section = pls[0]->init_section;
2006 int64_t url_offset = -1;
2010 if (first_init_section == NULL || n_pls == 0)
2013 url = first_init_section->url;
2014 url_offset = first_init_section->url_offset;
2015 size = pls[0]->init_section->size;
2016 for (i=0;i<n_pls;i++) {
2017 if (av_strcasecmp(pls[i]->init_section->url,url) || pls[i]->init_section->url_offset != url_offset || pls[i]->init_section->size != size) {
2024 static int copy_init_section(struct representation *rep_dest, struct representation *rep_src)
2026 rep_dest->init_sec_buf = av_mallocz(rep_src->init_sec_buf_size);
2027 if (!rep_dest->init_sec_buf) {
2028 av_log(rep_dest->ctx, AV_LOG_WARNING, "Cannot alloc memory for init_sec_buf\n");
2029 return AVERROR(ENOMEM);
2031 memcpy(rep_dest->init_sec_buf, rep_src->init_sec_buf, rep_src->init_sec_data_len);
2032 rep_dest->init_sec_buf_size = rep_src->init_sec_buf_size;
2033 rep_dest->init_sec_data_len = rep_src->init_sec_data_len;
2034 rep_dest->cur_timestamp = rep_src->cur_timestamp;
2039 static int dash_close(AVFormatContext *s);
2041 static int dash_read_header(AVFormatContext *s)
2043 DASHContext *c = s->priv_data;
2044 struct representation *rep;
2046 int stream_index = 0;
2049 c->interrupt_callback = &s->interrupt_callback;
2051 if ((ret = save_avio_options(s)) < 0)
2054 if ((ret = parse_manifest(s, s->url, s->pb)) < 0)
2057 /* If this isn't a live stream, fill the total duration of the
2060 s->duration = (int64_t) c->media_presentation_duration * AV_TIME_BASE;
2062 av_dict_set(&c->avio_opts, "seekable", "0", 0);
2066 c->is_init_section_common_video = is_common_init_section_exist(c->videos, c->n_videos);
2068 /* Open the demuxer for video and audio components if available */
2069 for (i = 0; i < c->n_videos; i++) {
2071 if (i > 0 && c->is_init_section_common_video) {
2072 ret = copy_init_section(rep, c->videos[0]);
2076 ret = open_demux_for_component(s, rep);
2080 rep->stream_index = stream_index;
2085 c->is_init_section_common_audio = is_common_init_section_exist(c->audios, c->n_audios);
2087 for (i = 0; i < c->n_audios; i++) {
2089 if (i > 0 && c->is_init_section_common_audio) {
2090 ret = copy_init_section(rep, c->audios[0]);
2094 ret = open_demux_for_component(s, rep);
2098 rep->stream_index = stream_index;
2103 c->is_init_section_common_audio = is_common_init_section_exist(c->subtitles, c->n_subtitles);
2105 for (i = 0; i < c->n_subtitles; i++) {
2106 rep = c->subtitles[i];
2107 if (i > 0 && c->is_init_section_common_audio) {
2108 ret = copy_init_section(rep, c->subtitles[0]);
2112 ret = open_demux_for_component(s, rep);
2116 rep->stream_index = stream_index;
2120 if (!stream_index) {
2121 ret = AVERROR_INVALIDDATA;
2125 /* Create a program */
2128 program = av_new_program(s, 0);
2130 ret = AVERROR(ENOMEM);
2134 for (i = 0; i < c->n_videos; i++) {
2136 av_program_add_stream_index(s, 0, rep->stream_index);
2137 rep->assoc_stream = s->streams[rep->stream_index];
2138 if (rep->bandwidth > 0)
2139 av_dict_set_int(&rep->assoc_stream->metadata, "variant_bitrate", rep->bandwidth, 0);
2141 av_dict_set(&rep->assoc_stream->metadata, "id", rep->id, 0);
2143 for (i = 0; i < c->n_audios; i++) {
2145 av_program_add_stream_index(s, 0, rep->stream_index);
2146 rep->assoc_stream = s->streams[rep->stream_index];
2147 if (rep->bandwidth > 0)
2148 av_dict_set_int(&rep->assoc_stream->metadata, "variant_bitrate", rep->bandwidth, 0);
2150 av_dict_set(&rep->assoc_stream->metadata, "id", rep->id, 0);
2152 av_dict_set(&rep->assoc_stream->metadata, "language", rep->lang, 0);
2153 av_freep(&rep->lang);
2156 for (i = 0; i < c->n_subtitles; i++) {
2157 rep = c->subtitles[i];
2158 av_program_add_stream_index(s, 0, rep->stream_index);
2159 rep->assoc_stream = s->streams[rep->stream_index];
2161 av_dict_set(&rep->assoc_stream->metadata, "id", rep->id, 0);
2163 av_dict_set(&rep->assoc_stream->metadata, "language", rep->lang, 0);
2164 av_freep(&rep->lang);
2175 static void recheck_discard_flags(AVFormatContext *s, struct representation **p, int n)
2179 for (i = 0; i < n; i++) {
2180 struct representation *pls = p[i];
2181 int needed = !pls->assoc_stream || pls->assoc_stream->discard < AVDISCARD_ALL;
2183 if (needed && !pls->ctx) {
2184 pls->cur_seg_offset = 0;
2185 pls->init_sec_buf_read_offset = 0;
2187 for (j = 0; j < n; j++) {
2188 pls->cur_seq_no = FFMAX(pls->cur_seq_no, p[j]->cur_seq_no);
2190 reopen_demux_for_component(s, pls);
2191 av_log(s, AV_LOG_INFO, "Now receiving stream_index %d\n", pls->stream_index);
2192 } else if (!needed && pls->ctx) {
2193 close_demux_for_component(pls);
2194 ff_format_io_close(pls->parent, &pls->input);
2195 av_log(s, AV_LOG_INFO, "No longer receiving stream_index %d\n", pls->stream_index);
2200 static int dash_read_packet(AVFormatContext *s, AVPacket *pkt)
2202 DASHContext *c = s->priv_data;
2205 struct representation *cur = NULL;
2206 struct representation *rep = NULL;
2208 recheck_discard_flags(s, c->videos, c->n_videos);
2209 recheck_discard_flags(s, c->audios, c->n_audios);
2210 recheck_discard_flags(s, c->subtitles, c->n_subtitles);
2212 for (i = 0; i < c->n_videos; i++) {
2216 if (!cur || rep->cur_timestamp < mints) {
2218 mints = rep->cur_timestamp;
2221 for (i = 0; i < c->n_audios; i++) {
2225 if (!cur || rep->cur_timestamp < mints) {
2227 mints = rep->cur_timestamp;
2231 for (i = 0; i < c->n_subtitles; i++) {
2232 rep = c->subtitles[i];
2235 if (!cur || rep->cur_timestamp < mints) {
2237 mints = rep->cur_timestamp;
2242 return AVERROR_INVALIDDATA;
2244 while (!ff_check_interrupt(c->interrupt_callback) && !ret) {
2245 ret = av_read_frame(cur->ctx, pkt);
2247 /* If we got a packet, return it */
2248 cur->cur_timestamp = av_rescale(pkt->pts, (int64_t)cur->ctx->streams[0]->time_base.num * 90000, cur->ctx->streams[0]->time_base.den);
2249 pkt->stream_index = cur->stream_index;
2252 if (cur->is_restart_needed) {
2253 cur->cur_seg_offset = 0;
2254 cur->init_sec_buf_read_offset = 0;
2255 ff_format_io_close(cur->parent, &cur->input);
2256 ret = reopen_demux_for_component(s, cur);
2257 cur->is_restart_needed = 0;
2263 static int dash_close(AVFormatContext *s)
2265 DASHContext *c = s->priv_data;
2268 free_subtitle_list(c);
2269 av_dict_free(&c->avio_opts);
2270 av_freep(&c->base_url);
2274 static int dash_seek(AVFormatContext *s, struct representation *pls, int64_t seek_pos_msec, int flags, int dry_run)
2279 int64_t duration = 0;
2281 av_log(pls->parent, AV_LOG_VERBOSE, "DASH seek pos[%"PRId64"ms] %s\n",
2282 seek_pos_msec, dry_run ? " (dry)" : "");
2284 // single fragment mode
2285 if (pls->n_fragments == 1) {
2286 pls->cur_timestamp = 0;
2287 pls->cur_seg_offset = 0;
2290 ff_read_frame_flush(pls->ctx);
2291 return av_seek_frame(pls->ctx, -1, seek_pos_msec * 1000, flags);
2294 ff_format_io_close(pls->parent, &pls->input);
2296 // find the nearest fragment
2297 if (pls->n_timelines > 0 && pls->fragment_timescale > 0) {
2298 int64_t num = pls->first_seq_no;
2299 av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with SegmentTimeline start n_timelines[%d] "
2300 "last_seq_no[%"PRId64"].\n",
2301 (int)pls->n_timelines, (int64_t)pls->last_seq_no);
2302 for (i = 0; i < pls->n_timelines; i++) {
2303 if (pls->timelines[i]->starttime > 0) {
2304 duration = pls->timelines[i]->starttime;
2306 duration += pls->timelines[i]->duration;
2307 if (seek_pos_msec < ((duration * 1000) / pls->fragment_timescale)) {
2310 for (j = 0; j < pls->timelines[i]->repeat; j++) {
2311 duration += pls->timelines[i]->duration;
2313 if (seek_pos_msec < ((duration * 1000) / pls->fragment_timescale)) {
2321 pls->cur_seq_no = num > pls->last_seq_no ? pls->last_seq_no : num;
2322 av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with SegmentTimeline end cur_seq_no[%"PRId64"].\n",
2323 (int64_t)pls->cur_seq_no);
2324 } else if (pls->fragment_duration > 0) {
2325 pls->cur_seq_no = pls->first_seq_no + ((seek_pos_msec * pls->fragment_timescale) / pls->fragment_duration) / 1000;
2327 av_log(pls->parent, AV_LOG_ERROR, "dash_seek missing timeline or fragment_duration\n");
2328 pls->cur_seq_no = pls->first_seq_no;
2330 pls->cur_timestamp = 0;
2331 pls->cur_seg_offset = 0;
2332 pls->init_sec_buf_read_offset = 0;
2333 ret = dry_run ? 0 : reopen_demux_for_component(s, pls);
2338 static int dash_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
2341 DASHContext *c = s->priv_data;
2342 int64_t seek_pos_msec = av_rescale_rnd(timestamp, 1000,
2343 s->streams[stream_index]->time_base.den,
2344 flags & AVSEEK_FLAG_BACKWARD ?
2345 AV_ROUND_DOWN : AV_ROUND_UP);
2346 if ((flags & AVSEEK_FLAG_BYTE) || c->is_live)
2347 return AVERROR(ENOSYS);
2349 /* Seek in discarded streams with dry_run=1 to avoid reopening them */
2350 for (i = 0; i < c->n_videos; i++) {
2352 ret = dash_seek(s, c->videos[i], seek_pos_msec, flags, !c->videos[i]->ctx);
2354 for (i = 0; i < c->n_audios; i++) {
2356 ret = dash_seek(s, c->audios[i], seek_pos_msec, flags, !c->audios[i]->ctx);
2358 for (i = 0; i < c->n_subtitles; i++) {
2360 ret = dash_seek(s, c->subtitles[i], seek_pos_msec, flags, !c->subtitles[i]->ctx);
2366 static int dash_probe(const AVProbeData *p)
2368 if (!av_stristr(p->buf, "<MPD"))
2371 if (av_stristr(p->buf, "dash:profile:isoff-on-demand:2011") ||
2372 av_stristr(p->buf, "dash:profile:isoff-live:2011") ||
2373 av_stristr(p->buf, "dash:profile:isoff-live:2012") ||
2374 av_stristr(p->buf, "dash:profile:isoff-main:2011") ||
2375 av_stristr(p->buf, "3GPP:PSS:profile:DASH1")) {
2376 return AVPROBE_SCORE_MAX;
2378 if (av_stristr(p->buf, "dash:profile")) {
2379 return AVPROBE_SCORE_MAX;
2385 #define OFFSET(x) offsetof(DASHContext, x)
2386 #define FLAGS AV_OPT_FLAG_DECODING_PARAM
2387 static const AVOption dash_options[] = {
2388 {"allowed_extensions", "List of file extensions that dash is allowed to access",
2389 OFFSET(allowed_extensions), AV_OPT_TYPE_STRING,
2390 {.str = "aac,m4a,m4s,m4v,mov,mp4,webm,ts"},
2391 INT_MIN, INT_MAX, FLAGS},
2395 static const AVClass dash_class = {
2396 .class_name = "dash",
2397 .item_name = av_default_item_name,
2398 .option = dash_options,
2399 .version = LIBAVUTIL_VERSION_INT,
2402 AVInputFormat ff_dash_demuxer = {
2404 .long_name = NULL_IF_CONFIG_SMALL("Dynamic Adaptive Streaming over HTTP"),
2405 .priv_class = &dash_class,
2406 .priv_data_size = sizeof(DASHContext),
2407 .read_probe = dash_probe,
2408 .read_header = dash_read_header,
2409 .read_packet = dash_read_packet,
2410 .read_close = dash_close,
2411 .read_seek = dash_read_seek,
2412 .flags = AVFMT_NO_BYTE_SEEK,