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;
90 AVStream *assoc_stream; /* demuxer stream associated with this representation */
93 struct fragment **fragments; /* VOD list of fragment for profile */
96 struct timeline **timelines;
100 int64_t start_number; /* used in case when we have dynamic list of segment to know which segments are new one*/
102 int64_t fragment_duration;
103 int64_t fragment_timescale;
105 int64_t presentation_timeoffset;
108 int64_t cur_seg_offset;
109 int64_t cur_seg_size;
110 struct fragment *cur_seg;
112 /* Currently active Media Initialization Section */
113 struct fragment *init_section;
114 uint8_t *init_sec_buf;
115 uint32_t init_sec_buf_size;
116 uint32_t init_sec_data_len;
117 uint32_t init_sec_buf_read_offset;
118 int64_t cur_timestamp;
119 int is_restart_needed;
122 typedef struct DASHContext {
123 const AVClass *class;
125 char *adaptionset_contenttype_val;
126 char *adaptionset_par_val;
127 char *adaptionset_lang_val;
128 char *adaptionset_minbw_val;
129 char *adaptionset_maxbw_val;
130 char *adaptionset_minwidth_val;
131 char *adaptionset_maxwidth_val;
132 char *adaptionset_minheight_val;
133 char *adaptionset_maxheight_val;
134 char *adaptionset_minframerate_val;
135 char *adaptionset_maxframerate_val;
136 char *adaptionset_segmentalignment_val;
137 char *adaptionset_bitstreamswitching_val;
140 struct representation **videos;
142 struct representation **audios;
144 struct representation **subtitles;
146 /* MediaPresentationDescription Attribute */
147 uint64_t media_presentation_duration;
148 uint64_t suggested_presentation_delay;
149 uint64_t availability_start_time;
150 uint64_t availability_end_time;
151 uint64_t publish_time;
152 uint64_t minimum_update_period;
153 uint64_t time_shift_buffer_depth;
154 uint64_t min_buffer_time;
156 /* Period Attribute */
157 uint64_t period_duration;
158 uint64_t period_start;
161 AVIOInterruptCB *interrupt_callback;
162 char *allowed_extensions;
163 AVDictionary *avio_opts;
166 /* Flags for init section*/
167 int is_init_section_common_video;
168 int is_init_section_common_audio;
172 static int ishttp(char *url)
174 const char *proto_name = avio_find_protocol_name(url);
175 return av_strstart(proto_name, "http", NULL);
178 static int aligned(int val)
180 return ((val + 0x3F) >> 6) << 6;
183 static uint64_t get_current_time_in_sec(void)
185 return av_gettime() / 1000000;
188 static uint64_t get_utc_date_time_insec(AVFormatContext *s, const char *datetime)
199 /* ISO-8601 date parser */
203 ret = sscanf(datetime, "%d-%d-%dT%d:%d:%fZ", &year, &month, &day, &hour, &minute, &second);
204 /* year, month, day, hour, minute, second 6 arguments */
206 av_log(s, AV_LOG_WARNING, "get_utc_date_time_insec get a wrong time format\n");
208 timeinfo.tm_year = year - 1900;
209 timeinfo.tm_mon = month - 1;
210 timeinfo.tm_mday = day;
211 timeinfo.tm_hour = hour;
212 timeinfo.tm_min = minute;
213 timeinfo.tm_sec = (int)second;
215 return av_timegm(&timeinfo);
218 static uint32_t get_duration_insec(AVFormatContext *s, const char *duration)
220 /* ISO-8601 duration parser */
228 const char *ptr = duration;
231 if (*ptr == 'P' || *ptr == 'T') {
236 if (sscanf(ptr, "%f%c%n", &value, &type, &size) != 2) {
237 av_log(s, AV_LOG_WARNING, "get_duration_insec get a wrong time format\n");
238 return 0; /* parser error */
242 days = (uint32_t)value;
245 hours = (uint32_t)value;
248 mins = (uint32_t)value;
251 secs = (uint32_t)value;
254 // handle invalid type
259 return ((days * 24 + hours) * 60 + mins) * 60 + secs;
262 static int64_t get_segment_start_time_based_on_timeline(struct representation *pls, int64_t cur_seq_no)
264 int64_t start_time = 0;
269 if (pls->n_timelines) {
270 for (i = 0; i < pls->n_timelines; i++) {
271 if (pls->timelines[i]->starttime > 0) {
272 start_time = pls->timelines[i]->starttime;
274 if (num == cur_seq_no)
277 start_time += pls->timelines[i]->duration;
279 if (pls->timelines[i]->repeat == -1) {
280 start_time = pls->timelines[i]->duration * cur_seq_no;
284 for (j = 0; j < pls->timelines[i]->repeat; j++) {
286 if (num == cur_seq_no)
288 start_time += pls->timelines[i]->duration;
297 static int64_t calc_next_seg_no_from_timelines(struct representation *pls, int64_t cur_time)
302 int64_t start_time = 0;
304 for (i = 0; i < pls->n_timelines; i++) {
305 if (pls->timelines[i]->starttime > 0) {
306 start_time = pls->timelines[i]->starttime;
308 if (start_time > cur_time)
311 start_time += pls->timelines[i]->duration;
312 for (j = 0; j < pls->timelines[i]->repeat; j++) {
314 if (start_time > cur_time)
316 start_time += pls->timelines[i]->duration;
327 static void free_fragment(struct fragment **seg)
332 av_freep(&(*seg)->url);
336 static void free_fragment_list(struct representation *pls)
340 for (i = 0; i < pls->n_fragments; i++) {
341 free_fragment(&pls->fragments[i]);
343 av_freep(&pls->fragments);
344 pls->n_fragments = 0;
347 static void free_timelines_list(struct representation *pls)
351 for (i = 0; i < pls->n_timelines; i++) {
352 av_freep(&pls->timelines[i]);
354 av_freep(&pls->timelines);
355 pls->n_timelines = 0;
358 static void free_representation(struct representation *pls)
360 free_fragment_list(pls);
361 free_timelines_list(pls);
362 free_fragment(&pls->cur_seg);
363 free_fragment(&pls->init_section);
364 av_freep(&pls->init_sec_buf);
365 av_freep(&pls->pb.buffer);
366 ff_format_io_close(pls->parent, &pls->input);
369 avformat_close_input(&pls->ctx);
372 av_freep(&pls->url_template);
376 static void free_video_list(DASHContext *c)
379 for (i = 0; i < c->n_videos; i++) {
380 struct representation *pls = c->videos[i];
381 free_representation(pls);
383 av_freep(&c->videos);
387 static void free_audio_list(DASHContext *c)
390 for (i = 0; i < c->n_audios; i++) {
391 struct representation *pls = c->audios[i];
392 free_representation(pls);
394 av_freep(&c->audios);
398 static void free_subtitle_list(DASHContext *c)
401 for (i = 0; i < c->n_subtitles; i++) {
402 struct representation *pls = c->subtitles[i];
403 free_representation(pls);
405 av_freep(&c->subtitles);
409 static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url,
410 AVDictionary *opts, AVDictionary *opts2, int *is_http)
412 DASHContext *c = s->priv_data;
413 AVDictionary *tmp = NULL;
414 const char *proto_name = NULL;
417 av_dict_copy(&tmp, opts, 0);
418 av_dict_copy(&tmp, opts2, 0);
420 if (av_strstart(url, "crypto", NULL)) {
421 if (url[6] == '+' || url[6] == ':')
422 proto_name = avio_find_protocol_name(url + 7);
426 proto_name = avio_find_protocol_name(url);
429 return AVERROR_INVALIDDATA;
431 // only http(s) & file are allowed
432 if (av_strstart(proto_name, "file", NULL)) {
433 if (strcmp(c->allowed_extensions, "ALL") && !av_match_ext(url, c->allowed_extensions)) {
434 av_log(s, AV_LOG_ERROR,
435 "Filename extension of \'%s\' is not a common multimedia extension, blocked for security reasons.\n"
436 "If you wish to override this adjust allowed_extensions, you can set it to \'ALL\' to allow all\n",
438 return AVERROR_INVALIDDATA;
440 } else if (av_strstart(proto_name, "http", NULL)) {
443 return AVERROR_INVALIDDATA;
445 if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':')
447 else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':')
449 else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))
450 return AVERROR_INVALIDDATA;
453 ret = avio_open2(pb, url, AVIO_FLAG_READ, c->interrupt_callback, &tmp);
455 // update cookies on http response with setcookies.
456 char *new_cookies = NULL;
458 if (!(s->flags & AVFMT_FLAG_CUSTOM_IO))
459 av_opt_get(*pb, "cookies", AV_OPT_SEARCH_CHILDREN, (uint8_t**)&new_cookies);
462 av_dict_set(&opts, "cookies", new_cookies, AV_DICT_DONT_STRDUP_VAL);
470 *is_http = av_strstart(proto_name, "http", NULL);
475 static char *get_content_url(xmlNodePtr *baseurl_nodes,
479 char *rep_bandwidth_val,
485 char *tmp_str = av_mallocz(max_url_size);
486 char *tmp_str_2 = av_mallocz(max_url_size);
488 if (!tmp_str || !tmp_str_2) {
492 for (i = 0; i < n_baseurl_nodes; ++i) {
493 if (baseurl_nodes[i] &&
494 baseurl_nodes[i]->children &&
495 baseurl_nodes[i]->children->type == XML_TEXT_NODE) {
496 text = xmlNodeGetContent(baseurl_nodes[i]->children);
498 memset(tmp_str, 0, max_url_size);
499 memset(tmp_str_2, 0, max_url_size);
500 ff_make_absolute_url(tmp_str_2, max_url_size, tmp_str, text);
501 av_strlcpy(tmp_str, tmp_str_2, max_url_size);
508 ff_make_absolute_url(tmp_str, max_url_size, tmp_str, val);
511 url = av_strireplace(tmp_str, "$RepresentationID$", (const char*)rep_id_val);
515 av_strlcpy(tmp_str, url, max_url_size);
517 if (rep_bandwidth_val && tmp_str[0] != '\0') {
518 // free any previously assigned url before reassigning
520 url = av_strireplace(tmp_str, "$Bandwidth$", (const char*)rep_bandwidth_val);
531 static char *get_val_from_nodes_tab(xmlNodePtr *nodes, const int n_nodes, const char *attrname)
536 for (i = 0; i < n_nodes; ++i) {
538 val = xmlGetProp(nodes[i], attrname);
547 static xmlNodePtr find_child_node_by_name(xmlNodePtr rootnode, const char *nodename)
549 xmlNodePtr node = rootnode;
554 node = xmlFirstElementChild(node);
556 if (!av_strcasecmp(node->name, nodename)) {
559 node = xmlNextElementSibling(node);
564 static enum AVMediaType get_content_type(xmlNodePtr node)
566 enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
572 for (i = 0; i < 2; i++) {
573 attr = i ? "mimeType" : "contentType";
574 val = xmlGetProp(node, attr);
576 if (av_stristr((const char *)val, "video")) {
577 type = AVMEDIA_TYPE_VIDEO;
578 } else if (av_stristr((const char *)val, "audio")) {
579 type = AVMEDIA_TYPE_AUDIO;
580 } else if (av_stristr((const char *)val, "text")) {
581 type = AVMEDIA_TYPE_SUBTITLE;
590 static struct fragment * get_Fragment(char *range)
592 struct fragment * seg = av_mallocz(sizeof(struct fragment));
599 char *str_end_offset;
600 char *str_offset = av_strtok(range, "-", &str_end_offset);
601 seg->url_offset = strtoll(str_offset, NULL, 10);
602 seg->size = strtoll(str_end_offset, NULL, 10) - seg->url_offset;
608 static int parse_manifest_segmenturlnode(AVFormatContext *s, struct representation *rep,
609 xmlNodePtr fragmenturl_node,
610 xmlNodePtr *baseurl_nodes,
612 char *rep_bandwidth_val)
614 DASHContext *c = s->priv_data;
615 char *initialization_val = NULL;
616 char *media_val = NULL;
617 char *range_val = NULL;
618 int max_url_size = c ? c->max_url_size: MAX_URL_SIZE;
620 if (!av_strcasecmp(fragmenturl_node->name, (const char *)"Initialization")) {
621 initialization_val = xmlGetProp(fragmenturl_node, "sourceURL");
622 range_val = xmlGetProp(fragmenturl_node, "range");
623 if (initialization_val || range_val) {
624 rep->init_section = get_Fragment(range_val);
625 if (!rep->init_section) {
626 xmlFree(initialization_val);
628 return AVERROR(ENOMEM);
630 rep->init_section->url = get_content_url(baseurl_nodes, 4,
636 if (!rep->init_section->url) {
637 av_free(rep->init_section);
638 xmlFree(initialization_val);
640 return AVERROR(ENOMEM);
642 xmlFree(initialization_val);
645 } else if (!av_strcasecmp(fragmenturl_node->name, (const char *)"SegmentURL")) {
646 media_val = xmlGetProp(fragmenturl_node, "media");
647 range_val = xmlGetProp(fragmenturl_node, "mediaRange");
648 if (media_val || range_val) {
649 struct fragment *seg = get_Fragment(range_val);
653 return AVERROR(ENOMEM);
655 seg->url = get_content_url(baseurl_nodes, 4,
664 return AVERROR(ENOMEM);
666 dynarray_add(&rep->fragments, &rep->n_fragments, seg);
675 static int parse_manifest_segmenttimeline(AVFormatContext *s, struct representation *rep,
676 xmlNodePtr fragment_timeline_node)
678 xmlAttrPtr attr = NULL;
681 if (!av_strcasecmp(fragment_timeline_node->name, (const char *)"S")) {
682 struct timeline *tml = av_mallocz(sizeof(struct timeline));
684 return AVERROR(ENOMEM);
686 attr = fragment_timeline_node->properties;
688 val = xmlGetProp(fragment_timeline_node, attr->name);
691 av_log(s, AV_LOG_WARNING, "parse_manifest_segmenttimeline attr->name = %s val is NULL\n", attr->name);
695 if (!av_strcasecmp(attr->name, (const char *)"t")) {
696 tml->starttime = (int64_t)strtoll(val, NULL, 10);
697 } else if (!av_strcasecmp(attr->name, (const char *)"r")) {
698 tml->repeat =(int64_t) strtoll(val, NULL, 10);
699 } else if (!av_strcasecmp(attr->name, (const char *)"d")) {
700 tml->duration = (int64_t)strtoll(val, NULL, 10);
705 dynarray_add(&rep->timelines, &rep->n_timelines, tml);
711 static int resolve_content_path(AVFormatContext *s, const char *url, int *max_url_size, xmlNodePtr *baseurl_nodes, int n_baseurl_nodes)
713 char *tmp_str = NULL;
715 char *mpdName = NULL;
716 xmlNodePtr node = NULL;
717 char *baseurl = NULL;
718 char *root_url = NULL;
728 int tmp_max_url_size = strlen(url);
730 for (i = n_baseurl_nodes-1; i >= 0 ; i--) {
731 text = xmlNodeGetContent(baseurl_nodes[i]);
734 tmp_max_url_size += strlen(text);
742 tmp_max_url_size = aligned(tmp_max_url_size);
743 text = av_mallocz(tmp_max_url_size);
745 updated = AVERROR(ENOMEM);
748 av_strlcpy(text, url, strlen(url)+1);
750 while (mpdName = av_strtok(tmp, "/", &tmp)) {
751 size = strlen(mpdName);
755 path = av_mallocz(tmp_max_url_size);
756 tmp_str = av_mallocz(tmp_max_url_size);
757 if (!tmp_str || !path) {
758 updated = AVERROR(ENOMEM);
762 av_strlcpy (path, url, strlen(url) - size + 1);
763 for (rootId = n_baseurl_nodes - 1; rootId > 0; rootId --) {
764 if (!(node = baseurl_nodes[rootId])) {
767 text = xmlNodeGetContent(node);
775 node = baseurl_nodes[rootId];
776 baseurl = xmlNodeGetContent(node);
777 root_url = (av_strcasecmp(baseurl, "")) ? baseurl : path;
779 xmlNodeSetContent(node, root_url);
783 size = strlen(root_url);
784 isRootHttp = ishttp(root_url);
786 if (root_url[size - 1] != token) {
787 av_strlcat(root_url, "/", size + 2);
791 for (i = 0; i < n_baseurl_nodes; ++i) {
795 text = xmlNodeGetContent(baseurl_nodes[i]);
796 if (text && !av_strstart(text, "/", NULL)) {
797 memset(tmp_str, 0, strlen(tmp_str));
798 if (!ishttp(text) && isRootHttp) {
799 av_strlcpy(tmp_str, root_url, size + 1);
801 start = (text[0] == token);
802 if (start && av_stristr(tmp_str, text)) {
804 if (!av_strncasecmp(tmp_str, "http://", 7)) {
806 } else if (!av_strncasecmp(tmp_str, "https://", 8)) {
810 memset(p + 1, 0, strlen(p));
812 av_strlcat(tmp_str, text + start, tmp_max_url_size);
813 xmlNodeSetContent(baseurl_nodes[i], tmp_str);
820 if (tmp_max_url_size > *max_url_size) {
821 *max_url_size = tmp_max_url_size;
830 static int parse_manifest_representation(AVFormatContext *s, const char *url,
832 xmlNodePtr adaptionset_node,
833 xmlNodePtr mpd_baseurl_node,
834 xmlNodePtr period_baseurl_node,
835 xmlNodePtr period_segmenttemplate_node,
836 xmlNodePtr period_segmentlist_node,
837 xmlNodePtr fragment_template_node,
838 xmlNodePtr content_component_node,
839 xmlNodePtr adaptionset_baseurl_node,
840 xmlNodePtr adaptionset_segmentlist_node,
841 xmlNodePtr adaptionset_supplementalproperty_node)
844 int32_t subtitle_rep_idx = 0;
845 int32_t audio_rep_idx = 0;
846 int32_t video_rep_idx = 0;
847 DASHContext *c = s->priv_data;
848 struct representation *rep = NULL;
849 struct fragment *seg = NULL;
850 xmlNodePtr representation_segmenttemplate_node = NULL;
851 xmlNodePtr representation_baseurl_node = NULL;
852 xmlNodePtr representation_segmentlist_node = NULL;
853 xmlNodePtr segmentlists_tab[3];
854 xmlNodePtr fragment_timeline_node = NULL;
855 xmlNodePtr fragment_templates_tab[5];
856 char *duration_val = NULL;
857 char *presentation_timeoffset_val = NULL;
858 char *startnumber_val = NULL;
859 char *timescale_val = NULL;
860 char *initialization_val = NULL;
861 char *media_val = NULL;
863 xmlNodePtr baseurl_nodes[4];
864 xmlNodePtr representation_node = node;
865 char *rep_id_val = xmlGetProp(representation_node, "id");
866 char *rep_bandwidth_val = xmlGetProp(representation_node, "bandwidth");
867 char *rep_framerate_val = xmlGetProp(representation_node, "frameRate");
868 enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
870 // try get information from representation
871 if (type == AVMEDIA_TYPE_UNKNOWN)
872 type = get_content_type(representation_node);
873 // try get information from contentComponen
874 if (type == AVMEDIA_TYPE_UNKNOWN)
875 type = get_content_type(content_component_node);
876 // try get information from adaption set
877 if (type == AVMEDIA_TYPE_UNKNOWN)
878 type = get_content_type(adaptionset_node);
879 if (type == AVMEDIA_TYPE_UNKNOWN) {
880 av_log(s, AV_LOG_VERBOSE, "Parsing '%s' - skipp not supported representation type\n", url);
881 } else if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO || type == AVMEDIA_TYPE_SUBTITLE) {
882 // convert selected representation to our internal struct
883 rep = av_mallocz(sizeof(struct representation));
885 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(AVFormatContext *s, const char *url,
1120 xmlNodePtr adaptionset_node,
1121 xmlNodePtr mpd_baseurl_node,
1122 xmlNodePtr period_baseurl_node,
1123 xmlNodePtr period_segmenttemplate_node,
1124 xmlNodePtr period_segmentlist_node)
1127 DASHContext *c = s->priv_data;
1128 xmlNodePtr fragment_template_node = NULL;
1129 xmlNodePtr content_component_node = NULL;
1130 xmlNodePtr adaptionset_baseurl_node = NULL;
1131 xmlNodePtr adaptionset_segmentlist_node = NULL;
1132 xmlNodePtr adaptionset_supplementalproperty_node = NULL;
1133 xmlNodePtr node = NULL;
1134 c->adaptionset_contenttype_val = xmlGetProp(adaptionset_node, "contentType");
1135 c->adaptionset_par_val = xmlGetProp(adaptionset_node, "par");
1136 c->adaptionset_lang_val = xmlGetProp(adaptionset_node, "lang");
1137 c->adaptionset_minbw_val = xmlGetProp(adaptionset_node, "minBandwidth");
1138 c->adaptionset_maxbw_val = xmlGetProp(adaptionset_node, "maxBandwidth");
1139 c->adaptionset_minwidth_val = xmlGetProp(adaptionset_node, "minWidth");
1140 c->adaptionset_maxwidth_val = xmlGetProp(adaptionset_node, "maxWidth");
1141 c->adaptionset_minheight_val = xmlGetProp(adaptionset_node, "minHeight");
1142 c->adaptionset_maxheight_val = xmlGetProp(adaptionset_node, "maxHeight");
1143 c->adaptionset_minframerate_val = xmlGetProp(adaptionset_node, "minFrameRate");
1144 c->adaptionset_maxframerate_val = xmlGetProp(adaptionset_node, "maxFrameRate");
1145 c->adaptionset_segmentalignment_val = xmlGetProp(adaptionset_node, "segmentAlignment");
1146 c->adaptionset_bitstreamswitching_val = xmlGetProp(adaptionset_node, "bitstreamSwitching");
1148 node = xmlFirstElementChild(adaptionset_node);
1150 if (!av_strcasecmp(node->name, (const char *)"SegmentTemplate")) {
1151 fragment_template_node = node;
1152 } else if (!av_strcasecmp(node->name, (const char *)"ContentComponent")) {
1153 content_component_node = node;
1154 } else if (!av_strcasecmp(node->name, (const char *)"BaseURL")) {
1155 adaptionset_baseurl_node = node;
1156 } else if (!av_strcasecmp(node->name, (const char *)"SegmentList")) {
1157 adaptionset_segmentlist_node = node;
1158 } else if (!av_strcasecmp(node->name, (const char *)"SupplementalProperty")) {
1159 adaptionset_supplementalproperty_node = node;
1160 } else if (!av_strcasecmp(node->name, (const char *)"Representation")) {
1161 ret = parse_manifest_representation(s, url, node,
1164 period_baseurl_node,
1165 period_segmenttemplate_node,
1166 period_segmentlist_node,
1167 fragment_template_node,
1168 content_component_node,
1169 adaptionset_baseurl_node,
1170 adaptionset_segmentlist_node,
1171 adaptionset_supplementalproperty_node);
1176 node = xmlNextElementSibling(node);
1181 static int parse_programinformation(AVFormatContext *s, xmlNodePtr node)
1183 xmlChar *val = NULL;
1185 node = xmlFirstElementChild(node);
1187 if (!av_strcasecmp(node->name, "Title")) {
1188 val = xmlNodeGetContent(node);
1190 av_dict_set(&s->metadata, "Title", val, 0);
1192 } else if (!av_strcasecmp(node->name, "Source")) {
1193 val = xmlNodeGetContent(node);
1195 av_dict_set(&s->metadata, "Source", val, 0);
1197 } else if (!av_strcasecmp(node->name, "Copyright")) {
1198 val = xmlNodeGetContent(node);
1200 av_dict_set(&s->metadata, "Copyright", val, 0);
1203 node = xmlNextElementSibling(node);
1210 static int parse_manifest(AVFormatContext *s, const char *url, AVIOContext *in)
1212 DASHContext *c = s->priv_data;
1215 uint8_t *new_url = NULL;
1216 int64_t filesize = 0;
1217 char *buffer = NULL;
1218 AVDictionary *opts = NULL;
1220 xmlNodePtr root_element = NULL;
1221 xmlNodePtr node = NULL;
1222 xmlNodePtr period_node = NULL;
1223 xmlNodePtr tmp_node = NULL;
1224 xmlNodePtr mpd_baseurl_node = NULL;
1225 xmlNodePtr period_baseurl_node = NULL;
1226 xmlNodePtr period_segmenttemplate_node = NULL;
1227 xmlNodePtr period_segmentlist_node = NULL;
1228 xmlNodePtr adaptionset_node = NULL;
1229 xmlAttrPtr attr = NULL;
1231 uint32_t period_duration_sec = 0;
1232 uint32_t period_start_sec = 0;
1237 av_dict_copy(&opts, c->avio_opts, 0);
1238 ret = avio_open2(&in, url, AVIO_FLAG_READ, c->interrupt_callback, &opts);
1239 av_dict_free(&opts);
1244 if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >= 0) {
1245 c->base_url = av_strdup(new_url);
1247 c->base_url = av_strdup(url);
1250 filesize = avio_size(in);
1251 if (filesize <= 0) {
1252 filesize = 8 * 1024;
1255 buffer = av_mallocz(filesize);
1257 av_free(c->base_url);
1258 return AVERROR(ENOMEM);
1261 filesize = avio_read(in, buffer, filesize);
1262 if (filesize <= 0) {
1263 av_log(s, AV_LOG_ERROR, "Unable to read to offset '%s'\n", url);
1264 ret = AVERROR_INVALIDDATA;
1268 doc = xmlReadMemory(buffer, filesize, c->base_url, NULL, 0);
1269 root_element = xmlDocGetRootElement(doc);
1270 node = root_element;
1273 ret = AVERROR_INVALIDDATA;
1274 av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing root node\n", url);
1278 if (node->type != XML_ELEMENT_NODE ||
1279 av_strcasecmp(node->name, (const char *)"MPD")) {
1280 ret = AVERROR_INVALIDDATA;
1281 av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - wrong root node name[%s] type[%d]\n", url, node->name, (int)node->type);
1285 val = xmlGetProp(node, "type");
1287 av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing type attrib\n", url);
1288 ret = AVERROR_INVALIDDATA;
1291 if (!av_strcasecmp(val, (const char *)"dynamic"))
1295 attr = node->properties;
1297 val = xmlGetProp(node, attr->name);
1299 if (!av_strcasecmp(attr->name, (const char *)"availabilityStartTime")) {
1300 c->availability_start_time = get_utc_date_time_insec(s, (const char *)val);
1301 av_log(s, AV_LOG_TRACE, "c->availability_start_time = [%"PRId64"]\n", c->availability_start_time);
1302 } else if (!av_strcasecmp(attr->name, (const char *)"availabilityEndTime")) {
1303 c->availability_end_time = get_utc_date_time_insec(s, (const char *)val);
1304 av_log(s, AV_LOG_TRACE, "c->availability_end_time = [%"PRId64"]\n", c->availability_end_time);
1305 } else if (!av_strcasecmp(attr->name, (const char *)"publishTime")) {
1306 c->publish_time = get_utc_date_time_insec(s, (const char *)val);
1307 av_log(s, AV_LOG_TRACE, "c->publish_time = [%"PRId64"]\n", c->publish_time);
1308 } else if (!av_strcasecmp(attr->name, (const char *)"minimumUpdatePeriod")) {
1309 c->minimum_update_period = get_duration_insec(s, (const char *)val);
1310 av_log(s, AV_LOG_TRACE, "c->minimum_update_period = [%"PRId64"]\n", c->minimum_update_period);
1311 } else if (!av_strcasecmp(attr->name, (const char *)"timeShiftBufferDepth")) {
1312 c->time_shift_buffer_depth = get_duration_insec(s, (const char *)val);
1313 av_log(s, AV_LOG_TRACE, "c->time_shift_buffer_depth = [%"PRId64"]\n", c->time_shift_buffer_depth);
1314 } else if (!av_strcasecmp(attr->name, (const char *)"minBufferTime")) {
1315 c->min_buffer_time = get_duration_insec(s, (const char *)val);
1316 av_log(s, AV_LOG_TRACE, "c->min_buffer_time = [%"PRId64"]\n", c->min_buffer_time);
1317 } else if (!av_strcasecmp(attr->name, (const char *)"suggestedPresentationDelay")) {
1318 c->suggested_presentation_delay = get_duration_insec(s, (const char *)val);
1319 av_log(s, AV_LOG_TRACE, "c->suggested_presentation_delay = [%"PRId64"]\n", c->suggested_presentation_delay);
1320 } else if (!av_strcasecmp(attr->name, (const char *)"mediaPresentationDuration")) {
1321 c->media_presentation_duration = get_duration_insec(s, (const char *)val);
1322 av_log(s, AV_LOG_TRACE, "c->media_presentation_duration = [%"PRId64"]\n", c->media_presentation_duration);
1328 tmp_node = find_child_node_by_name(node, "BaseURL");
1330 mpd_baseurl_node = xmlCopyNode(tmp_node,1);
1332 mpd_baseurl_node = xmlNewNode(NULL, "BaseURL");
1335 // at now we can handle only one period, with the longest duration
1336 node = xmlFirstElementChild(node);
1338 if (!av_strcasecmp(node->name, (const char *)"Period")) {
1339 period_duration_sec = 0;
1340 period_start_sec = 0;
1341 attr = node->properties;
1343 val = xmlGetProp(node, attr->name);
1344 if (!av_strcasecmp(attr->name, (const char *)"duration")) {
1345 period_duration_sec = get_duration_insec(s, (const char *)val);
1346 } else if (!av_strcasecmp(attr->name, (const char *)"start")) {
1347 period_start_sec = get_duration_insec(s, (const char *)val);
1352 if ((period_duration_sec) >= (c->period_duration)) {
1354 c->period_duration = period_duration_sec;
1355 c->period_start = period_start_sec;
1356 if (c->period_start > 0)
1357 c->media_presentation_duration = c->period_duration;
1359 } else if (!av_strcasecmp(node->name, "ProgramInformation")) {
1360 parse_programinformation(s, node);
1362 node = xmlNextElementSibling(node);
1365 av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing Period node\n", url);
1366 ret = AVERROR_INVALIDDATA;
1370 adaptionset_node = xmlFirstElementChild(period_node);
1371 while (adaptionset_node) {
1372 if (!av_strcasecmp(adaptionset_node->name, (const char *)"BaseURL")) {
1373 period_baseurl_node = adaptionset_node;
1374 } else if (!av_strcasecmp(adaptionset_node->name, (const char *)"SegmentTemplate")) {
1375 period_segmenttemplate_node = adaptionset_node;
1376 } else if (!av_strcasecmp(adaptionset_node->name, (const char *)"SegmentList")) {
1377 period_segmentlist_node = adaptionset_node;
1378 } else if (!av_strcasecmp(adaptionset_node->name, (const char *)"AdaptationSet")) {
1379 parse_manifest_adaptationset(s, url, adaptionset_node, mpd_baseurl_node, period_baseurl_node, period_segmenttemplate_node, period_segmentlist_node);
1381 adaptionset_node = xmlNextElementSibling(adaptionset_node);
1384 /*free the document */
1387 xmlFreeNode(mpd_baseurl_node);
1398 static int64_t calc_cur_seg_no(AVFormatContext *s, struct representation *pls)
1400 DASHContext *c = s->priv_data;
1402 int64_t start_time_offset = 0;
1405 if (pls->n_fragments) {
1406 av_log(s, AV_LOG_TRACE, "in n_fragments mode\n");
1407 num = pls->first_seq_no;
1408 } else if (pls->n_timelines) {
1409 av_log(s, AV_LOG_TRACE, "in n_timelines mode\n");
1410 start_time_offset = get_segment_start_time_based_on_timeline(pls, 0xFFFFFFFF) - 60 * pls->fragment_timescale; // 60 seconds before end
1411 num = calc_next_seg_no_from_timelines(pls, start_time_offset);
1413 num = pls->first_seq_no;
1415 num += pls->first_seq_no;
1416 } else if (pls->fragment_duration){
1417 av_log(s, AV_LOG_TRACE, "in fragment_duration mode fragment_timescale = %"PRId64", presentation_timeoffset = %"PRId64"\n", pls->fragment_timescale, pls->presentation_timeoffset);
1418 if (pls->presentation_timeoffset) {
1419 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;
1420 } else if (c->publish_time > 0 && !c->availability_start_time) {
1421 if (c->min_buffer_time) {
1422 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;
1424 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;
1427 num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time) - c->suggested_presentation_delay) * pls->fragment_timescale) / pls->fragment_duration;
1431 num = pls->first_seq_no;
1436 static int64_t calc_min_seg_no(AVFormatContext *s, struct representation *pls)
1438 DASHContext *c = s->priv_data;
1441 if (c->is_live && pls->fragment_duration) {
1442 av_log(s, AV_LOG_TRACE, "in live mode\n");
1443 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;
1445 num = pls->first_seq_no;
1450 static int64_t calc_max_seg_no(struct representation *pls, DASHContext *c)
1454 if (pls->n_fragments) {
1455 num = pls->first_seq_no + pls->n_fragments - 1;
1456 } else if (pls->n_timelines) {
1458 num = pls->first_seq_no + pls->n_timelines - 1;
1459 for (i = 0; i < pls->n_timelines; i++) {
1460 if (pls->timelines[i]->repeat == -1) {
1461 int length_of_each_segment = pls->timelines[i]->duration / pls->fragment_timescale;
1462 num = c->period_duration / length_of_each_segment;
1464 num += pls->timelines[i]->repeat;
1467 } else if (c->is_live && pls->fragment_duration) {
1468 num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time)) * pls->fragment_timescale) / pls->fragment_duration;
1469 } else if (pls->fragment_duration) {
1470 num = pls->first_seq_no + (c->media_presentation_duration * pls->fragment_timescale) / pls->fragment_duration;
1476 static void move_timelines(struct representation *rep_src, struct representation *rep_dest, DASHContext *c)
1478 if (rep_dest && rep_src ) {
1479 free_timelines_list(rep_dest);
1480 rep_dest->timelines = rep_src->timelines;
1481 rep_dest->n_timelines = rep_src->n_timelines;
1482 rep_dest->first_seq_no = rep_src->first_seq_no;
1483 rep_dest->last_seq_no = calc_max_seg_no(rep_dest, c);
1484 rep_src->timelines = NULL;
1485 rep_src->n_timelines = 0;
1486 rep_dest->cur_seq_no = rep_src->cur_seq_no;
1490 static void move_segments(struct representation *rep_src, struct representation *rep_dest, DASHContext *c)
1492 if (rep_dest && rep_src ) {
1493 free_fragment_list(rep_dest);
1494 if (rep_src->start_number > (rep_dest->start_number + rep_dest->n_fragments))
1495 rep_dest->cur_seq_no = 0;
1497 rep_dest->cur_seq_no += rep_src->start_number - rep_dest->start_number;
1498 rep_dest->fragments = rep_src->fragments;
1499 rep_dest->n_fragments = rep_src->n_fragments;
1500 rep_dest->parent = rep_src->parent;
1501 rep_dest->last_seq_no = calc_max_seg_no(rep_dest, c);
1502 rep_src->fragments = NULL;
1503 rep_src->n_fragments = 0;
1508 static int refresh_manifest(AVFormatContext *s)
1511 DASHContext *c = s->priv_data;
1512 // save current context
1513 int n_videos = c->n_videos;
1514 struct representation **videos = c->videos;
1515 int n_audios = c->n_audios;
1516 struct representation **audios = c->audios;
1517 int n_subtitles = c->n_subtitles;
1518 struct representation **subtitles = c->subtitles;
1519 char *base_url = c->base_url;
1527 c->subtitles = NULL;
1528 ret = parse_manifest(s, s->url, NULL);
1532 if (c->n_videos != n_videos) {
1533 av_log(c, AV_LOG_ERROR,
1534 "new manifest has mismatched no. of video representations, %d -> %d\n",
1535 n_videos, c->n_videos);
1536 return AVERROR_INVALIDDATA;
1538 if (c->n_audios != n_audios) {
1539 av_log(c, AV_LOG_ERROR,
1540 "new manifest has mismatched no. of audio representations, %d -> %d\n",
1541 n_audios, c->n_audios);
1542 return AVERROR_INVALIDDATA;
1544 if (c->n_subtitles != n_subtitles) {
1545 av_log(c, AV_LOG_ERROR,
1546 "new manifest has mismatched no. of subtitles representations, %d -> %d\n",
1547 n_subtitles, c->n_subtitles);
1548 return AVERROR_INVALIDDATA;
1551 for (i = 0; i < n_videos; i++) {
1552 struct representation *cur_video = videos[i];
1553 struct representation *ccur_video = c->videos[i];
1554 if (cur_video->timelines) {
1555 // calc current time
1556 int64_t currentTime = get_segment_start_time_based_on_timeline(cur_video, cur_video->cur_seq_no) / cur_video->fragment_timescale;
1558 ccur_video->cur_seq_no = calc_next_seg_no_from_timelines(ccur_video, currentTime * cur_video->fragment_timescale - 1);
1559 if (ccur_video->cur_seq_no >= 0) {
1560 move_timelines(ccur_video, cur_video, c);
1563 if (cur_video->fragments) {
1564 move_segments(ccur_video, cur_video, c);
1567 for (i = 0; i < n_audios; i++) {
1568 struct representation *cur_audio = audios[i];
1569 struct representation *ccur_audio = c->audios[i];
1570 if (cur_audio->timelines) {
1571 // calc current time
1572 int64_t currentTime = get_segment_start_time_based_on_timeline(cur_audio, cur_audio->cur_seq_no) / cur_audio->fragment_timescale;
1574 ccur_audio->cur_seq_no = calc_next_seg_no_from_timelines(ccur_audio, currentTime * cur_audio->fragment_timescale - 1);
1575 if (ccur_audio->cur_seq_no >= 0) {
1576 move_timelines(ccur_audio, cur_audio, c);
1579 if (cur_audio->fragments) {
1580 move_segments(ccur_audio, cur_audio, c);
1589 c->base_url = base_url;
1592 free_subtitle_list(c);
1598 c->n_subtitles = n_subtitles;
1599 c->subtitles = subtitles;
1600 c->n_audios = n_audios;
1602 c->n_videos = n_videos;
1607 static struct fragment *get_current_fragment(struct representation *pls)
1609 int64_t min_seq_no = 0;
1610 int64_t max_seq_no = 0;
1611 struct fragment *seg = NULL;
1612 struct fragment *seg_ptr = NULL;
1613 DASHContext *c = pls->parent->priv_data;
1615 while (( !ff_check_interrupt(c->interrupt_callback)&& pls->n_fragments > 0)) {
1616 if (pls->cur_seq_no < pls->n_fragments) {
1617 seg_ptr = pls->fragments[pls->cur_seq_no];
1618 seg = av_mallocz(sizeof(struct fragment));
1622 seg->url = av_strdup(seg_ptr->url);
1627 seg->size = seg_ptr->size;
1628 seg->url_offset = seg_ptr->url_offset;
1630 } else if (c->is_live) {
1631 refresh_manifest(pls->parent);
1637 min_seq_no = calc_min_seg_no(pls->parent, pls);
1638 max_seq_no = calc_max_seg_no(pls, c);
1640 if (pls->timelines || pls->fragments) {
1641 refresh_manifest(pls->parent);
1643 if (pls->cur_seq_no <= min_seq_no) {
1644 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);
1645 pls->cur_seq_no = calc_cur_seg_no(pls->parent, pls);
1646 } else if (pls->cur_seq_no > max_seq_no) {
1647 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);
1649 seg = av_mallocz(sizeof(struct fragment));
1653 } else if (pls->cur_seq_no <= pls->last_seq_no) {
1654 seg = av_mallocz(sizeof(struct fragment));
1660 char *tmpfilename= av_mallocz(c->max_url_size);
1664 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));
1665 seg->url = av_strireplace(pls->url_template, pls->url_template, tmpfilename);
1667 av_log(pls->parent, AV_LOG_WARNING, "Unable to resolve template url '%s', try to use origin template\n", pls->url_template);
1668 seg->url = av_strdup(pls->url_template);
1670 av_log(pls->parent, AV_LOG_ERROR, "Cannot resolve template url '%s'\n", pls->url_template);
1671 av_free(tmpfilename);
1675 av_free(tmpfilename);
1682 static int read_from_url(struct representation *pls, struct fragment *seg,
1683 uint8_t *buf, int buf_size)
1687 /* limit read if the fragment was only a part of a file */
1689 buf_size = FFMIN(buf_size, pls->cur_seg_size - pls->cur_seg_offset);
1691 ret = avio_read(pls->input, buf, buf_size);
1693 pls->cur_seg_offset += ret;
1698 static int open_input(DASHContext *c, struct representation *pls, struct fragment *seg)
1700 AVDictionary *opts = NULL;
1704 url = av_mallocz(c->max_url_size);
1706 ret = AVERROR(ENOMEM);
1710 if (seg->size >= 0) {
1711 /* try to restrict the HTTP request to the part we want
1712 * (if this is in fact a HTTP request) */
1713 av_dict_set_int(&opts, "offset", seg->url_offset, 0);
1714 av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
1717 ff_make_absolute_url(url, c->max_url_size, c->base_url, seg->url);
1718 av_log(pls->parent, AV_LOG_VERBOSE, "DASH request for url '%s', offset %"PRId64", playlist %d\n",
1719 url, seg->url_offset, pls->rep_idx);
1720 ret = open_url(pls->parent, &pls->input, url, c->avio_opts, opts, NULL);
1724 av_dict_free(&opts);
1725 pls->cur_seg_offset = 0;
1726 pls->cur_seg_size = seg->size;
1730 static int update_init_section(struct representation *pls)
1732 static const int max_init_section_size = 1024 * 1024;
1733 DASHContext *c = pls->parent->priv_data;
1738 if (!pls->init_section || pls->init_sec_buf)
1741 ret = open_input(c, pls, pls->init_section);
1743 av_log(pls->parent, AV_LOG_WARNING,
1744 "Failed to open an initialization section in playlist %d\n",
1749 if (pls->init_section->size >= 0)
1750 sec_size = pls->init_section->size;
1751 else if ((urlsize = avio_size(pls->input)) >= 0)
1754 sec_size = max_init_section_size;
1756 av_log(pls->parent, AV_LOG_DEBUG,
1757 "Downloading an initialization section of size %"PRId64"\n",
1760 sec_size = FFMIN(sec_size, max_init_section_size);
1762 av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size);
1764 ret = read_from_url(pls, pls->init_section, pls->init_sec_buf,
1765 pls->init_sec_buf_size);
1766 ff_format_io_close(pls->parent, &pls->input);
1771 pls->init_sec_data_len = ret;
1772 pls->init_sec_buf_read_offset = 0;
1777 static int64_t seek_data(void *opaque, int64_t offset, int whence)
1779 struct representation *v = opaque;
1780 if (v->n_fragments && !v->init_sec_data_len) {
1781 return avio_seek(v->input, offset, whence);
1784 return AVERROR(ENOSYS);
1787 static int read_data(void *opaque, uint8_t *buf, int buf_size)
1790 struct representation *v = opaque;
1791 DASHContext *c = v->parent->priv_data;
1795 free_fragment(&v->cur_seg);
1796 v->cur_seg = get_current_fragment(v);
1802 /* load/update Media Initialization Section, if any */
1803 ret = update_init_section(v);
1807 ret = open_input(c, v, v->cur_seg);
1809 if (ff_check_interrupt(c->interrupt_callback)) {
1813 av_log(v->parent, AV_LOG_WARNING, "Failed to open fragment of playlist %d\n", v->rep_idx);
1819 if (v->init_sec_buf_read_offset < v->init_sec_data_len) {
1820 /* Push init section out first before first actual fragment */
1821 int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size);
1822 memcpy(buf, v->init_sec_buf, copy_size);
1823 v->init_sec_buf_read_offset += copy_size;
1828 /* check the v->cur_seg, if it is null, get current and double check if the new v->cur_seg*/
1830 v->cur_seg = get_current_fragment(v);
1836 ret = read_from_url(v, v->cur_seg, buf, buf_size);
1840 if (c->is_live || v->cur_seq_no < v->last_seq_no) {
1841 if (!v->is_restart_needed)
1843 v->is_restart_needed = 1;
1850 static int save_avio_options(AVFormatContext *s)
1852 DASHContext *c = s->priv_data;
1853 const char *opts[] = {
1854 "headers", "user_agent", "cookies", "http_proxy", "referer", "rw_timeout", "icy", NULL };
1855 const char **opt = opts;
1856 uint8_t *buf = NULL;
1860 if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN, &buf) >= 0) {
1861 if (buf[0] != '\0') {
1862 ret = av_dict_set(&c->avio_opts, *opt, buf, AV_DICT_DONT_STRDUP_VAL);
1877 static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url,
1878 int flags, AVDictionary **opts)
1880 av_log(s, AV_LOG_ERROR,
1881 "A DASH playlist item '%s' referred to an external file '%s'. "
1882 "Opening this file was forbidden for security reasons\n",
1884 return AVERROR(EPERM);
1887 static void close_demux_for_component(struct representation *pls)
1889 /* note: the internal buffer could have changed */
1890 av_freep(&pls->pb.buffer);
1891 memset(&pls->pb, 0x00, sizeof(AVIOContext));
1892 pls->ctx->pb = NULL;
1893 avformat_close_input(&pls->ctx);
1897 static int reopen_demux_for_component(AVFormatContext *s, struct representation *pls)
1899 DASHContext *c = s->priv_data;
1900 ff_const59 AVInputFormat *in_fmt = NULL;
1901 AVDictionary *in_fmt_opts = NULL;
1902 uint8_t *avio_ctx_buffer = NULL;
1906 close_demux_for_component(pls);
1909 if (ff_check_interrupt(&s->interrupt_callback)) {
1914 if (!(pls->ctx = avformat_alloc_context())) {
1915 ret = AVERROR(ENOMEM);
1919 avio_ctx_buffer = av_malloc(INITIAL_BUFFER_SIZE);
1920 if (!avio_ctx_buffer ) {
1921 ret = AVERROR(ENOMEM);
1922 avformat_free_context(pls->ctx);
1927 ffio_init_context(&pls->pb, avio_ctx_buffer , INITIAL_BUFFER_SIZE, 0, pls, read_data, NULL, NULL);
1929 ffio_init_context(&pls->pb, avio_ctx_buffer , INITIAL_BUFFER_SIZE, 0, pls, read_data, NULL, seek_data);
1931 pls->pb.seekable = 0;
1933 if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
1936 pls->ctx->flags = AVFMT_FLAG_CUSTOM_IO;
1937 pls->ctx->probesize = s->probesize > 0 ? s->probesize : 1024 * 4;
1938 pls->ctx->max_analyze_duration = s->max_analyze_duration > 0 ? s->max_analyze_duration : 4 * AV_TIME_BASE;
1939 ret = av_probe_input_buffer(&pls->pb, &in_fmt, "", NULL, 0, 0);
1941 av_log(s, AV_LOG_ERROR, "Error when loading first fragment, playlist %d\n", (int)pls->rep_idx);
1942 avformat_free_context(pls->ctx);
1947 pls->ctx->pb = &pls->pb;
1948 pls->ctx->io_open = nested_io_open;
1950 // provide additional information from mpd if available
1951 ret = avformat_open_input(&pls->ctx, "", in_fmt, &in_fmt_opts); //pls->init_section->url
1952 av_dict_free(&in_fmt_opts);
1955 if (pls->n_fragments) {
1956 #if FF_API_R_FRAME_RATE
1957 if (pls->framerate.den) {
1958 for (i = 0; i < pls->ctx->nb_streams; i++)
1959 pls->ctx->streams[i]->r_frame_rate = pls->framerate;
1962 ret = avformat_find_stream_info(pls->ctx, NULL);
1971 static int open_demux_for_component(AVFormatContext *s, struct representation *pls)
1977 pls->cur_seq_no = calc_cur_seg_no(s, pls);
1979 if (!pls->last_seq_no) {
1980 pls->last_seq_no = calc_max_seg_no(pls, s->priv_data);
1983 ret = reopen_demux_for_component(s, pls);
1987 for (i = 0; i < pls->ctx->nb_streams; i++) {
1988 AVStream *st = avformat_new_stream(s, NULL);
1989 AVStream *ist = pls->ctx->streams[i];
1991 ret = AVERROR(ENOMEM);
1995 avcodec_parameters_copy(st->codecpar, ist->codecpar);
1996 avpriv_set_pts_info(st, ist->pts_wrap_bits, ist->time_base.num, ist->time_base.den);
2004 static int is_common_init_section_exist(struct representation **pls, int n_pls)
2006 struct fragment *first_init_section = pls[0]->init_section;
2008 int64_t url_offset = -1;
2012 if (first_init_section == NULL || n_pls == 0)
2015 url = first_init_section->url;
2016 url_offset = first_init_section->url_offset;
2017 size = pls[0]->init_section->size;
2018 for (i=0;i<n_pls;i++) {
2019 if (av_strcasecmp(pls[i]->init_section->url,url) || pls[i]->init_section->url_offset != url_offset || pls[i]->init_section->size != size) {
2026 static int copy_init_section(struct representation *rep_dest, struct representation *rep_src)
2028 rep_dest->init_sec_buf = av_mallocz(rep_src->init_sec_buf_size);
2029 if (!rep_dest->init_sec_buf) {
2030 av_log(rep_dest->ctx, AV_LOG_WARNING, "Cannot alloc memory for init_sec_buf\n");
2031 return AVERROR(ENOMEM);
2033 memcpy(rep_dest->init_sec_buf, rep_src->init_sec_buf, rep_src->init_sec_data_len);
2034 rep_dest->init_sec_buf_size = rep_src->init_sec_buf_size;
2035 rep_dest->init_sec_data_len = rep_src->init_sec_data_len;
2036 rep_dest->cur_timestamp = rep_src->cur_timestamp;
2042 static int dash_read_header(AVFormatContext *s)
2044 DASHContext *c = s->priv_data;
2045 struct representation *rep;
2047 int stream_index = 0;
2050 c->interrupt_callback = &s->interrupt_callback;
2052 if ((ret = save_avio_options(s)) < 0)
2055 if ((ret = parse_manifest(s, s->url, s->pb)) < 0)
2058 /* If this isn't a live stream, fill the total duration of the
2061 s->duration = (int64_t) c->media_presentation_duration * AV_TIME_BASE;
2063 av_dict_set(&c->avio_opts, "seekable", "0", 0);
2067 c->is_init_section_common_video = is_common_init_section_exist(c->videos, c->n_videos);
2069 /* Open the demuxer for video and audio components if available */
2070 for (i = 0; i < c->n_videos; i++) {
2072 if (i > 0 && c->is_init_section_common_video) {
2073 ret = copy_init_section(rep, c->videos[0]);
2077 ret = open_demux_for_component(s, rep);
2081 rep->stream_index = stream_index;
2086 c->is_init_section_common_audio = is_common_init_section_exist(c->audios, c->n_audios);
2088 for (i = 0; i < c->n_audios; i++) {
2090 if (i > 0 && c->is_init_section_common_audio) {
2091 ret = copy_init_section(rep, c->audios[0]);
2095 ret = open_demux_for_component(s, rep);
2099 rep->stream_index = stream_index;
2104 c->is_init_section_common_audio = is_common_init_section_exist(c->subtitles, c->n_subtitles);
2106 for (i = 0; i < c->n_subtitles; i++) {
2107 rep = c->subtitles[i];
2108 if (i > 0 && c->is_init_section_common_audio) {
2109 ret = copy_init_section(rep, c->subtitles[0]);
2113 ret = open_demux_for_component(s, rep);
2117 rep->stream_index = stream_index;
2121 if (!stream_index) {
2122 ret = AVERROR_INVALIDDATA;
2126 /* Create a program */
2129 program = av_new_program(s, 0);
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 for (i = 0; i < c->n_subtitles; i++) {
2153 rep = c->subtitles[i];
2154 av_program_add_stream_index(s, 0, rep->stream_index);
2155 rep->assoc_stream = s->streams[rep->stream_index];
2157 av_dict_set(&rep->assoc_stream->metadata, "id", rep->id, 0);
2166 static void recheck_discard_flags(AVFormatContext *s, struct representation **p, int n)
2170 for (i = 0; i < n; i++) {
2171 struct representation *pls = p[i];
2172 int needed = !pls->assoc_stream || pls->assoc_stream->discard < AVDISCARD_ALL;
2174 if (needed && !pls->ctx) {
2175 pls->cur_seg_offset = 0;
2176 pls->init_sec_buf_read_offset = 0;
2178 for (j = 0; j < n; j++) {
2179 pls->cur_seq_no = FFMAX(pls->cur_seq_no, p[j]->cur_seq_no);
2181 reopen_demux_for_component(s, pls);
2182 av_log(s, AV_LOG_INFO, "Now receiving stream_index %d\n", pls->stream_index);
2183 } else if (!needed && pls->ctx) {
2184 close_demux_for_component(pls);
2185 ff_format_io_close(pls->parent, &pls->input);
2186 av_log(s, AV_LOG_INFO, "No longer receiving stream_index %d\n", pls->stream_index);
2191 static int dash_read_packet(AVFormatContext *s, AVPacket *pkt)
2193 DASHContext *c = s->priv_data;
2196 struct representation *cur = NULL;
2197 struct representation *rep = NULL;
2199 recheck_discard_flags(s, c->videos, c->n_videos);
2200 recheck_discard_flags(s, c->audios, c->n_audios);
2201 recheck_discard_flags(s, c->subtitles, c->n_subtitles);
2203 for (i = 0; i < c->n_videos; i++) {
2207 if (!cur || rep->cur_timestamp < mints) {
2209 mints = rep->cur_timestamp;
2212 for (i = 0; i < c->n_audios; i++) {
2216 if (!cur || rep->cur_timestamp < mints) {
2218 mints = rep->cur_timestamp;
2222 for (i = 0; i < c->n_subtitles; i++) {
2223 rep = c->subtitles[i];
2226 if (!cur || rep->cur_timestamp < mints) {
2228 mints = rep->cur_timestamp;
2233 return AVERROR_INVALIDDATA;
2235 while (!ff_check_interrupt(c->interrupt_callback) && !ret) {
2236 ret = av_read_frame(cur->ctx, pkt);
2238 /* If we got a packet, return it */
2239 cur->cur_timestamp = av_rescale(pkt->pts, (int64_t)cur->ctx->streams[0]->time_base.num * 90000, cur->ctx->streams[0]->time_base.den);
2240 pkt->stream_index = cur->stream_index;
2243 if (cur->is_restart_needed) {
2244 cur->cur_seg_offset = 0;
2245 cur->init_sec_buf_read_offset = 0;
2246 ff_format_io_close(cur->parent, &cur->input);
2247 ret = reopen_demux_for_component(s, cur);
2248 cur->is_restart_needed = 0;
2254 static int dash_close(AVFormatContext *s)
2256 DASHContext *c = s->priv_data;
2259 av_dict_free(&c->avio_opts);
2260 av_freep(&c->base_url);
2264 static int dash_seek(AVFormatContext *s, struct representation *pls, int64_t seek_pos_msec, int flags, int dry_run)
2269 int64_t duration = 0;
2271 av_log(pls->parent, AV_LOG_VERBOSE, "DASH seek pos[%"PRId64"ms], playlist %d%s\n",
2272 seek_pos_msec, pls->rep_idx, dry_run ? " (dry)" : "");
2274 // single fragment mode
2275 if (pls->n_fragments == 1) {
2276 pls->cur_timestamp = 0;
2277 pls->cur_seg_offset = 0;
2280 ff_read_frame_flush(pls->ctx);
2281 return av_seek_frame(pls->ctx, -1, seek_pos_msec * 1000, flags);
2284 ff_format_io_close(pls->parent, &pls->input);
2286 // find the nearest fragment
2287 if (pls->n_timelines > 0 && pls->fragment_timescale > 0) {
2288 int64_t num = pls->first_seq_no;
2289 av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with SegmentTimeline start n_timelines[%d] "
2290 "last_seq_no[%"PRId64"], playlist %d.\n",
2291 (int)pls->n_timelines, (int64_t)pls->last_seq_no, (int)pls->rep_idx);
2292 for (i = 0; i < pls->n_timelines; i++) {
2293 if (pls->timelines[i]->starttime > 0) {
2294 duration = pls->timelines[i]->starttime;
2296 duration += pls->timelines[i]->duration;
2297 if (seek_pos_msec < ((duration * 1000) / pls->fragment_timescale)) {
2300 for (j = 0; j < pls->timelines[i]->repeat; j++) {
2301 duration += pls->timelines[i]->duration;
2303 if (seek_pos_msec < ((duration * 1000) / pls->fragment_timescale)) {
2311 pls->cur_seq_no = num > pls->last_seq_no ? pls->last_seq_no : num;
2312 av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with SegmentTimeline end cur_seq_no[%"PRId64"], playlist %d.\n",
2313 (int64_t)pls->cur_seq_no, (int)pls->rep_idx);
2314 } else if (pls->fragment_duration > 0) {
2315 pls->cur_seq_no = pls->first_seq_no + ((seek_pos_msec * pls->fragment_timescale) / pls->fragment_duration) / 1000;
2317 av_log(pls->parent, AV_LOG_ERROR, "dash_seek missing timeline or fragment_duration\n");
2318 pls->cur_seq_no = pls->first_seq_no;
2320 pls->cur_timestamp = 0;
2321 pls->cur_seg_offset = 0;
2322 pls->init_sec_buf_read_offset = 0;
2323 ret = dry_run ? 0 : reopen_demux_for_component(s, pls);
2328 static int dash_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
2331 DASHContext *c = s->priv_data;
2332 int64_t seek_pos_msec = av_rescale_rnd(timestamp, 1000,
2333 s->streams[stream_index]->time_base.den,
2334 flags & AVSEEK_FLAG_BACKWARD ?
2335 AV_ROUND_DOWN : AV_ROUND_UP);
2336 if ((flags & AVSEEK_FLAG_BYTE) || c->is_live)
2337 return AVERROR(ENOSYS);
2339 /* Seek in discarded streams with dry_run=1 to avoid reopening them */
2340 for (i = 0; i < c->n_videos; i++) {
2342 ret = dash_seek(s, c->videos[i], seek_pos_msec, flags, !c->videos[i]->ctx);
2344 for (i = 0; i < c->n_audios; i++) {
2346 ret = dash_seek(s, c->audios[i], seek_pos_msec, flags, !c->audios[i]->ctx);
2348 for (i = 0; i < c->n_subtitles; i++) {
2350 ret = dash_seek(s, c->subtitles[i], seek_pos_msec, flags, !c->subtitles[i]->ctx);
2356 static int dash_probe(const AVProbeData *p)
2358 if (!av_stristr(p->buf, "<MPD"))
2361 if (av_stristr(p->buf, "dash:profile:isoff-on-demand:2011") ||
2362 av_stristr(p->buf, "dash:profile:isoff-live:2011") ||
2363 av_stristr(p->buf, "dash:profile:isoff-live:2012") ||
2364 av_stristr(p->buf, "dash:profile:isoff-main:2011") ||
2365 av_stristr(p->buf, "3GPP:PSS:profile:DASH1")) {
2366 return AVPROBE_SCORE_MAX;
2368 if (av_stristr(p->buf, "dash:profile")) {
2369 return AVPROBE_SCORE_MAX;
2375 #define OFFSET(x) offsetof(DASHContext, x)
2376 #define FLAGS AV_OPT_FLAG_DECODING_PARAM
2377 static const AVOption dash_options[] = {
2378 {"allowed_extensions", "List of file extensions that dash is allowed to access",
2379 OFFSET(allowed_extensions), AV_OPT_TYPE_STRING,
2380 {.str = "aac,m4a,m4s,m4v,mov,mp4,webm,ts"},
2381 INT_MIN, INT_MAX, FLAGS},
2385 static const AVClass dash_class = {
2386 .class_name = "dash",
2387 .item_name = av_default_item_name,
2388 .option = dash_options,
2389 .version = LIBAVUTIL_VERSION_INT,
2392 AVInputFormat ff_dash_demuxer = {
2394 .long_name = NULL_IF_CONFIG_SMALL("Dynamic Adaptive Streaming over HTTP"),
2395 .priv_class = &dash_class,
2396 .priv_data_size = sizeof(DASHContext),
2397 .read_probe = dash_probe,
2398 .read_header = dash_read_header,
2399 .read_packet = dash_read_packet,
2400 .read_close = dash_close,
2401 .read_seek = dash_read_seek,
2402 .flags = AVFMT_NO_BYTE_SEEK,