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;
88 enum AVMediaType type;
93 AVStream *assoc_stream; /* demuxer stream associated with this representation */
96 struct fragment **fragments; /* VOD list of fragment for profile */
99 struct timeline **timelines;
101 int64_t first_seq_no;
103 int64_t start_number; /* used in case when we have dynamic list of segment to know which segments are new one*/
105 int64_t fragment_duration;
106 int64_t fragment_timescale;
108 int64_t presentation_timeoffset;
111 int64_t cur_seg_offset;
112 int64_t cur_seg_size;
113 struct fragment *cur_seg;
115 /* Currently active Media Initialization Section */
116 struct fragment *init_section;
117 uint8_t *init_sec_buf;
118 uint32_t init_sec_buf_size;
119 uint32_t init_sec_data_len;
120 uint32_t init_sec_buf_read_offset;
121 int64_t cur_timestamp;
122 int is_restart_needed;
125 typedef struct DASHContext {
126 const AVClass *class;
130 struct representation **videos;
132 struct representation **audios;
134 struct representation **subtitles;
136 /* MediaPresentationDescription Attribute */
137 uint64_t media_presentation_duration;
138 uint64_t suggested_presentation_delay;
139 uint64_t availability_start_time;
140 uint64_t availability_end_time;
141 uint64_t publish_time;
142 uint64_t minimum_update_period;
143 uint64_t time_shift_buffer_depth;
144 uint64_t min_buffer_time;
146 /* Period Attribute */
147 uint64_t period_duration;
148 uint64_t period_start;
150 /* AdaptationSet Attribute */
151 char *adaptionset_lang;
154 AVIOInterruptCB *interrupt_callback;
155 char *allowed_extensions;
156 AVDictionary *avio_opts;
159 /* Flags for init section*/
160 int is_init_section_common_video;
161 int is_init_section_common_audio;
165 static int ishttp(char *url)
167 const char *proto_name = avio_find_protocol_name(url);
168 return av_strstart(proto_name, "http", NULL);
171 static int aligned(int val)
173 return ((val + 0x3F) >> 6) << 6;
176 static uint64_t get_current_time_in_sec(void)
178 return av_gettime() / 1000000;
181 static uint64_t get_utc_date_time_insec(AVFormatContext *s, const char *datetime)
192 /* ISO-8601 date parser */
196 ret = sscanf(datetime, "%d-%d-%dT%d:%d:%fZ", &year, &month, &day, &hour, &minute, &second);
197 /* year, month, day, hour, minute, second 6 arguments */
199 av_log(s, AV_LOG_WARNING, "get_utc_date_time_insec get a wrong time format\n");
201 timeinfo.tm_year = year - 1900;
202 timeinfo.tm_mon = month - 1;
203 timeinfo.tm_mday = day;
204 timeinfo.tm_hour = hour;
205 timeinfo.tm_min = minute;
206 timeinfo.tm_sec = (int)second;
208 return av_timegm(&timeinfo);
211 static uint32_t get_duration_insec(AVFormatContext *s, const char *duration)
213 /* ISO-8601 duration parser */
221 const char *ptr = duration;
224 if (*ptr == 'P' || *ptr == 'T') {
229 if (sscanf(ptr, "%f%c%n", &value, &type, &size) != 2) {
230 av_log(s, AV_LOG_WARNING, "get_duration_insec get a wrong time format\n");
231 return 0; /* parser error */
235 days = (uint32_t)value;
238 hours = (uint32_t)value;
241 mins = (uint32_t)value;
244 secs = (uint32_t)value;
247 // handle invalid type
252 return ((days * 24 + hours) * 60 + mins) * 60 + secs;
255 static int64_t get_segment_start_time_based_on_timeline(struct representation *pls, int64_t cur_seq_no)
257 int64_t start_time = 0;
262 if (pls->n_timelines) {
263 for (i = 0; i < pls->n_timelines; i++) {
264 if (pls->timelines[i]->starttime > 0) {
265 start_time = pls->timelines[i]->starttime;
267 if (num == cur_seq_no)
270 start_time += pls->timelines[i]->duration;
272 if (pls->timelines[i]->repeat == -1) {
273 start_time = pls->timelines[i]->duration * cur_seq_no;
277 for (j = 0; j < pls->timelines[i]->repeat; j++) {
279 if (num == cur_seq_no)
281 start_time += pls->timelines[i]->duration;
290 static int64_t calc_next_seg_no_from_timelines(struct representation *pls, int64_t cur_time)
295 int64_t start_time = 0;
297 for (i = 0; i < pls->n_timelines; i++) {
298 if (pls->timelines[i]->starttime > 0) {
299 start_time = pls->timelines[i]->starttime;
301 if (start_time > cur_time)
304 start_time += pls->timelines[i]->duration;
305 for (j = 0; j < pls->timelines[i]->repeat; j++) {
307 if (start_time > cur_time)
309 start_time += pls->timelines[i]->duration;
320 static void free_fragment(struct fragment **seg)
325 av_freep(&(*seg)->url);
329 static void free_fragment_list(struct representation *pls)
333 for (i = 0; i < pls->n_fragments; i++) {
334 free_fragment(&pls->fragments[i]);
336 av_freep(&pls->fragments);
337 pls->n_fragments = 0;
340 static void free_timelines_list(struct representation *pls)
344 for (i = 0; i < pls->n_timelines; i++) {
345 av_freep(&pls->timelines[i]);
347 av_freep(&pls->timelines);
348 pls->n_timelines = 0;
351 static void free_representation(struct representation *pls)
353 free_fragment_list(pls);
354 free_timelines_list(pls);
355 free_fragment(&pls->cur_seg);
356 free_fragment(&pls->init_section);
357 av_freep(&pls->init_sec_buf);
358 av_freep(&pls->pb.buffer);
359 ff_format_io_close(pls->parent, &pls->input);
362 avformat_close_input(&pls->ctx);
365 av_freep(&pls->url_template);
369 static void free_video_list(DASHContext *c)
372 for (i = 0; i < c->n_videos; i++) {
373 struct representation *pls = c->videos[i];
374 free_representation(pls);
376 av_freep(&c->videos);
380 static void free_audio_list(DASHContext *c)
383 for (i = 0; i < c->n_audios; i++) {
384 struct representation *pls = c->audios[i];
385 free_representation(pls);
387 av_freep(&c->audios);
391 static void free_subtitle_list(DASHContext *c)
394 for (i = 0; i < c->n_subtitles; i++) {
395 struct representation *pls = c->subtitles[i];
396 free_representation(pls);
398 av_freep(&c->subtitles);
402 static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url,
403 AVDictionary *opts, AVDictionary *opts2, int *is_http)
405 DASHContext *c = s->priv_data;
406 AVDictionary *tmp = NULL;
407 const char *proto_name = NULL;
410 av_dict_copy(&tmp, opts, 0);
411 av_dict_copy(&tmp, opts2, 0);
413 if (av_strstart(url, "crypto", NULL)) {
414 if (url[6] == '+' || url[6] == ':')
415 proto_name = avio_find_protocol_name(url + 7);
419 proto_name = avio_find_protocol_name(url);
422 return AVERROR_INVALIDDATA;
424 // only http(s) & file are allowed
425 if (av_strstart(proto_name, "file", NULL)) {
426 if (strcmp(c->allowed_extensions, "ALL") && !av_match_ext(url, c->allowed_extensions)) {
427 av_log(s, AV_LOG_ERROR,
428 "Filename extension of \'%s\' is not a common multimedia extension, blocked for security reasons.\n"
429 "If you wish to override this adjust allowed_extensions, you can set it to \'ALL\' to allow all\n",
431 return AVERROR_INVALIDDATA;
433 } else if (av_strstart(proto_name, "http", NULL)) {
436 return AVERROR_INVALIDDATA;
438 if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':')
440 else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':')
442 else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))
443 return AVERROR_INVALIDDATA;
446 ret = avio_open2(pb, url, AVIO_FLAG_READ, c->interrupt_callback, &tmp);
448 // update cookies on http response with setcookies.
449 char *new_cookies = NULL;
451 if (!(s->flags & AVFMT_FLAG_CUSTOM_IO))
452 av_opt_get(*pb, "cookies", AV_OPT_SEARCH_CHILDREN, (uint8_t**)&new_cookies);
455 av_dict_set(&opts, "cookies", new_cookies, AV_DICT_DONT_STRDUP_VAL);
463 *is_http = av_strstart(proto_name, "http", NULL);
468 static char *get_content_url(xmlNodePtr *baseurl_nodes,
472 char *rep_bandwidth_val,
478 char *tmp_str = av_mallocz(max_url_size);
479 char *tmp_str_2 = av_mallocz(max_url_size);
481 if (!tmp_str || !tmp_str_2) {
485 for (i = 0; i < n_baseurl_nodes; ++i) {
486 if (baseurl_nodes[i] &&
487 baseurl_nodes[i]->children &&
488 baseurl_nodes[i]->children->type == XML_TEXT_NODE) {
489 text = xmlNodeGetContent(baseurl_nodes[i]->children);
491 memset(tmp_str, 0, max_url_size);
492 memset(tmp_str_2, 0, max_url_size);
493 ff_make_absolute_url(tmp_str_2, max_url_size, tmp_str, text);
494 av_strlcpy(tmp_str, tmp_str_2, max_url_size);
501 ff_make_absolute_url(tmp_str, max_url_size, tmp_str, val);
504 url = av_strireplace(tmp_str, "$RepresentationID$", (const char*)rep_id_val);
508 av_strlcpy(tmp_str, url, max_url_size);
510 if (rep_bandwidth_val && tmp_str[0] != '\0') {
511 // free any previously assigned url before reassigning
513 url = av_strireplace(tmp_str, "$Bandwidth$", (const char*)rep_bandwidth_val);
524 static char *get_val_from_nodes_tab(xmlNodePtr *nodes, const int n_nodes, const char *attrname)
529 for (i = 0; i < n_nodes; ++i) {
531 val = xmlGetProp(nodes[i], attrname);
540 static xmlNodePtr find_child_node_by_name(xmlNodePtr rootnode, const char *nodename)
542 xmlNodePtr node = rootnode;
547 node = xmlFirstElementChild(node);
549 if (!av_strcasecmp(node->name, nodename)) {
552 node = xmlNextElementSibling(node);
557 static enum AVMediaType get_content_type(xmlNodePtr node)
559 enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
565 for (i = 0; i < 2; i++) {
566 attr = i ? "mimeType" : "contentType";
567 val = xmlGetProp(node, attr);
569 if (av_stristr((const char *)val, "video")) {
570 type = AVMEDIA_TYPE_VIDEO;
571 } else if (av_stristr((const char *)val, "audio")) {
572 type = AVMEDIA_TYPE_AUDIO;
573 } else if (av_stristr((const char *)val, "text")) {
574 type = AVMEDIA_TYPE_SUBTITLE;
583 static struct fragment * get_Fragment(char *range)
585 struct fragment * seg = av_mallocz(sizeof(struct fragment));
592 char *str_end_offset;
593 char *str_offset = av_strtok(range, "-", &str_end_offset);
594 seg->url_offset = strtoll(str_offset, NULL, 10);
595 seg->size = strtoll(str_end_offset, NULL, 10) - seg->url_offset + 1;
601 static int parse_manifest_segmenturlnode(AVFormatContext *s, struct representation *rep,
602 xmlNodePtr fragmenturl_node,
603 xmlNodePtr *baseurl_nodes,
605 char *rep_bandwidth_val)
607 DASHContext *c = s->priv_data;
608 char *initialization_val = NULL;
609 char *media_val = NULL;
610 char *range_val = NULL;
611 int max_url_size = c ? c->max_url_size: MAX_URL_SIZE;
613 if (!av_strcasecmp(fragmenturl_node->name, (const char *)"Initialization")) {
614 initialization_val = xmlGetProp(fragmenturl_node, "sourceURL");
615 range_val = xmlGetProp(fragmenturl_node, "range");
616 if (initialization_val || range_val) {
617 free_fragment(&rep->init_section);
618 rep->init_section = get_Fragment(range_val);
620 if (!rep->init_section) {
621 xmlFree(initialization_val);
622 return AVERROR(ENOMEM);
624 rep->init_section->url = get_content_url(baseurl_nodes, 4,
629 xmlFree(initialization_val);
630 if (!rep->init_section->url) {
631 av_freep(&rep->init_section);
632 return AVERROR(ENOMEM);
635 } else if (!av_strcasecmp(fragmenturl_node->name, (const char *)"SegmentURL")) {
636 media_val = xmlGetProp(fragmenturl_node, "media");
637 range_val = xmlGetProp(fragmenturl_node, "mediaRange");
638 if (media_val || range_val) {
639 struct fragment *seg = get_Fragment(range_val);
643 return AVERROR(ENOMEM);
645 seg->url = get_content_url(baseurl_nodes, 4,
653 return AVERROR(ENOMEM);
655 dynarray_add(&rep->fragments, &rep->n_fragments, seg);
662 static int parse_manifest_segmenttimeline(AVFormatContext *s, struct representation *rep,
663 xmlNodePtr fragment_timeline_node)
665 xmlAttrPtr attr = NULL;
668 if (!av_strcasecmp(fragment_timeline_node->name, (const char *)"S")) {
669 struct timeline *tml = av_mallocz(sizeof(struct timeline));
671 return AVERROR(ENOMEM);
673 attr = fragment_timeline_node->properties;
675 val = xmlGetProp(fragment_timeline_node, attr->name);
678 av_log(s, AV_LOG_WARNING, "parse_manifest_segmenttimeline attr->name = %s val is NULL\n", attr->name);
682 if (!av_strcasecmp(attr->name, (const char *)"t")) {
683 tml->starttime = (int64_t)strtoll(val, NULL, 10);
684 } else if (!av_strcasecmp(attr->name, (const char *)"r")) {
685 tml->repeat =(int64_t) strtoll(val, NULL, 10);
686 } else if (!av_strcasecmp(attr->name, (const char *)"d")) {
687 tml->duration = (int64_t)strtoll(val, NULL, 10);
692 dynarray_add(&rep->timelines, &rep->n_timelines, tml);
698 static int resolve_content_path(AVFormatContext *s, const char *url, int *max_url_size, xmlNodePtr *baseurl_nodes, int n_baseurl_nodes)
700 char *tmp_str = NULL;
702 char *mpdName = NULL;
703 xmlNodePtr node = NULL;
704 char *baseurl = NULL;
705 char *root_url = NULL;
715 int tmp_max_url_size = strlen(url);
717 for (i = n_baseurl_nodes-1; i >= 0 ; i--) {
718 text = xmlNodeGetContent(baseurl_nodes[i]);
721 tmp_max_url_size += strlen(text);
729 tmp_max_url_size = aligned(tmp_max_url_size);
730 text = av_mallocz(tmp_max_url_size);
732 updated = AVERROR(ENOMEM);
735 av_strlcpy(text, url, strlen(url)+1);
737 while (mpdName = av_strtok(tmp, "/", &tmp)) {
738 size = strlen(mpdName);
742 path = av_mallocz(tmp_max_url_size);
743 tmp_str = av_mallocz(tmp_max_url_size);
744 if (!tmp_str || !path) {
745 updated = AVERROR(ENOMEM);
749 av_strlcpy (path, url, strlen(url) - size + 1);
750 for (rootId = n_baseurl_nodes - 1; rootId > 0; rootId --) {
751 if (!(node = baseurl_nodes[rootId])) {
754 text = xmlNodeGetContent(node);
762 node = baseurl_nodes[rootId];
763 baseurl = xmlNodeGetContent(node);
764 root_url = (av_strcasecmp(baseurl, "")) ? baseurl : path;
766 xmlNodeSetContent(node, root_url);
770 size = strlen(root_url);
771 isRootHttp = ishttp(root_url);
773 if (root_url[size - 1] != token) {
774 av_strlcat(root_url, "/", size + 2);
778 for (i = 0; i < n_baseurl_nodes; ++i) {
782 text = xmlNodeGetContent(baseurl_nodes[i]);
783 if (text && !av_strstart(text, "/", NULL)) {
784 memset(tmp_str, 0, strlen(tmp_str));
785 if (!ishttp(text) && isRootHttp) {
786 av_strlcpy(tmp_str, root_url, size + 1);
788 start = (text[0] == token);
789 if (start && av_stristr(tmp_str, text)) {
791 if (!av_strncasecmp(tmp_str, "http://", 7)) {
793 } else if (!av_strncasecmp(tmp_str, "https://", 8)) {
797 memset(p + 1, 0, strlen(p));
799 av_strlcat(tmp_str, text + start, tmp_max_url_size);
800 xmlNodeSetContent(baseurl_nodes[i], tmp_str);
807 if (tmp_max_url_size > *max_url_size) {
808 *max_url_size = tmp_max_url_size;
817 static int parse_manifest_representation(AVFormatContext *s, const char *url,
819 xmlNodePtr adaptionset_node,
820 xmlNodePtr mpd_baseurl_node,
821 xmlNodePtr period_baseurl_node,
822 xmlNodePtr period_segmenttemplate_node,
823 xmlNodePtr period_segmentlist_node,
824 xmlNodePtr fragment_template_node,
825 xmlNodePtr content_component_node,
826 xmlNodePtr adaptionset_baseurl_node,
827 xmlNodePtr adaptionset_segmentlist_node,
828 xmlNodePtr adaptionset_supplementalproperty_node)
831 int32_t subtitle_rep_idx = 0;
832 int32_t audio_rep_idx = 0;
833 int32_t video_rep_idx = 0;
834 DASHContext *c = s->priv_data;
835 struct representation *rep = NULL;
836 struct fragment *seg = NULL;
837 xmlNodePtr representation_segmenttemplate_node = NULL;
838 xmlNodePtr representation_baseurl_node = NULL;
839 xmlNodePtr representation_segmentlist_node = NULL;
840 xmlNodePtr segmentlists_tab[3];
841 xmlNodePtr fragment_timeline_node = NULL;
842 xmlNodePtr fragment_templates_tab[5];
843 char *duration_val = NULL;
844 char *presentation_timeoffset_val = NULL;
845 char *startnumber_val = NULL;
846 char *timescale_val = NULL;
847 char *initialization_val = NULL;
848 char *media_val = NULL;
850 xmlNodePtr baseurl_nodes[4];
851 xmlNodePtr representation_node = node;
852 char *rep_id_val = xmlGetProp(representation_node, "id");
853 char *rep_bandwidth_val = xmlGetProp(representation_node, "bandwidth");
854 char *rep_framerate_val = xmlGetProp(representation_node, "frameRate");
855 enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
857 // try get information from representation
858 if (type == AVMEDIA_TYPE_UNKNOWN)
859 type = get_content_type(representation_node);
860 // try get information from contentComponen
861 if (type == AVMEDIA_TYPE_UNKNOWN)
862 type = get_content_type(content_component_node);
863 // try get information from adaption set
864 if (type == AVMEDIA_TYPE_UNKNOWN)
865 type = get_content_type(adaptionset_node);
866 if (type == AVMEDIA_TYPE_UNKNOWN) {
867 av_log(s, AV_LOG_VERBOSE, "Parsing '%s' - skipp not supported representation type\n", url);
868 } else if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO || type == AVMEDIA_TYPE_SUBTITLE) {
869 // convert selected representation to our internal struct
870 rep = av_mallocz(sizeof(struct representation));
872 ret = AVERROR(ENOMEM);
875 if (c->adaptionset_lang) {
876 rep->lang = av_strdup(c->adaptionset_lang);
878 av_log(s, AV_LOG_ERROR, "alloc language memory failure\n");
880 ret = AVERROR(ENOMEM);
885 representation_segmenttemplate_node = find_child_node_by_name(representation_node, "SegmentTemplate");
886 representation_baseurl_node = find_child_node_by_name(representation_node, "BaseURL");
887 representation_segmentlist_node = find_child_node_by_name(representation_node, "SegmentList");
889 baseurl_nodes[0] = mpd_baseurl_node;
890 baseurl_nodes[1] = period_baseurl_node;
891 baseurl_nodes[2] = adaptionset_baseurl_node;
892 baseurl_nodes[3] = representation_baseurl_node;
894 ret = resolve_content_path(s, url, &c->max_url_size, baseurl_nodes, 4);
895 c->max_url_size = aligned(c->max_url_size
896 + (rep_id_val ? strlen(rep_id_val) : 0)
897 + (rep_bandwidth_val ? strlen(rep_bandwidth_val) : 0));
898 if (ret == AVERROR(ENOMEM) || ret == 0) {
901 if (representation_segmenttemplate_node || fragment_template_node || period_segmenttemplate_node) {
902 fragment_timeline_node = NULL;
903 fragment_templates_tab[0] = representation_segmenttemplate_node;
904 fragment_templates_tab[1] = adaptionset_segmentlist_node;
905 fragment_templates_tab[2] = fragment_template_node;
906 fragment_templates_tab[3] = period_segmenttemplate_node;
907 fragment_templates_tab[4] = period_segmentlist_node;
909 presentation_timeoffset_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "presentationTimeOffset");
910 duration_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "duration");
911 startnumber_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "startNumber");
912 timescale_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "timescale");
913 initialization_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "initialization");
914 media_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "media");
916 if (initialization_val) {
917 rep->init_section = av_mallocz(sizeof(struct fragment));
918 if (!rep->init_section) {
920 ret = AVERROR(ENOMEM);
923 c->max_url_size = aligned(c->max_url_size + strlen(initialization_val));
924 rep->init_section->url = get_content_url(baseurl_nodes, 4, c->max_url_size, rep_id_val, rep_bandwidth_val, initialization_val);
925 if (!rep->init_section->url) {
926 av_free(rep->init_section);
928 ret = AVERROR(ENOMEM);
931 rep->init_section->size = -1;
932 xmlFree(initialization_val);
936 c->max_url_size = aligned(c->max_url_size + strlen(media_val));
937 rep->url_template = get_content_url(baseurl_nodes, 4, c->max_url_size, rep_id_val, rep_bandwidth_val, media_val);
941 if (presentation_timeoffset_val) {
942 rep->presentation_timeoffset = (int64_t) strtoll(presentation_timeoffset_val, NULL, 10);
943 av_log(s, AV_LOG_TRACE, "rep->presentation_timeoffset = [%"PRId64"]\n", rep->presentation_timeoffset);
944 xmlFree(presentation_timeoffset_val);
947 rep->fragment_duration = (int64_t) strtoll(duration_val, NULL, 10);
948 av_log(s, AV_LOG_TRACE, "rep->fragment_duration = [%"PRId64"]\n", rep->fragment_duration);
949 xmlFree(duration_val);
952 rep->fragment_timescale = (int64_t) strtoll(timescale_val, NULL, 10);
953 av_log(s, AV_LOG_TRACE, "rep->fragment_timescale = [%"PRId64"]\n", rep->fragment_timescale);
954 xmlFree(timescale_val);
956 if (startnumber_val) {
957 rep->start_number = rep->first_seq_no = (int64_t) strtoll(startnumber_val, NULL, 10);
958 av_log(s, AV_LOG_TRACE, "rep->first_seq_no = [%"PRId64"]\n", rep->first_seq_no);
959 xmlFree(startnumber_val);
961 if (adaptionset_supplementalproperty_node) {
962 if (!av_strcasecmp(xmlGetProp(adaptionset_supplementalproperty_node,"schemeIdUri"), "http://dashif.org/guidelines/last-segment-number")) {
963 val = xmlGetProp(adaptionset_supplementalproperty_node,"value");
965 av_log(s, AV_LOG_ERROR, "Missing value attribute in adaptionset_supplementalproperty_node\n");
967 rep->last_seq_no =(int64_t) strtoll(val, NULL, 10) - 1;
973 fragment_timeline_node = find_child_node_by_name(representation_segmenttemplate_node, "SegmentTimeline");
975 if (!fragment_timeline_node)
976 fragment_timeline_node = find_child_node_by_name(fragment_template_node, "SegmentTimeline");
977 if (!fragment_timeline_node)
978 fragment_timeline_node = find_child_node_by_name(adaptionset_segmentlist_node, "SegmentTimeline");
979 if (!fragment_timeline_node)
980 fragment_timeline_node = find_child_node_by_name(period_segmentlist_node, "SegmentTimeline");
981 if (fragment_timeline_node) {
982 fragment_timeline_node = xmlFirstElementChild(fragment_timeline_node);
983 while (fragment_timeline_node) {
984 ret = parse_manifest_segmenttimeline(s, rep, fragment_timeline_node);
988 fragment_timeline_node = xmlNextElementSibling(fragment_timeline_node);
991 } else if (representation_baseurl_node && !representation_segmentlist_node) {
992 seg = av_mallocz(sizeof(struct fragment));
994 ret = AVERROR(ENOMEM);
997 seg->url = get_content_url(baseurl_nodes, 4, c->max_url_size, rep_id_val, rep_bandwidth_val, NULL);
1000 ret = AVERROR(ENOMEM);
1004 dynarray_add(&rep->fragments, &rep->n_fragments, seg);
1005 } else if (representation_segmentlist_node) {
1006 // TODO: https://www.brendanlong.com/the-structure-of-an-mpeg-dash-mpd.html
1007 // http://www-itec.uni-klu.ac.at/dash/ddash/mpdGenerator.php?fragmentlength=15&type=full
1008 xmlNodePtr fragmenturl_node = NULL;
1009 segmentlists_tab[0] = representation_segmentlist_node;
1010 segmentlists_tab[1] = adaptionset_segmentlist_node;
1011 segmentlists_tab[2] = period_segmentlist_node;
1013 duration_val = get_val_from_nodes_tab(segmentlists_tab, 3, "duration");
1014 timescale_val = get_val_from_nodes_tab(segmentlists_tab, 3, "timescale");
1015 startnumber_val = get_val_from_nodes_tab(segmentlists_tab, 3, "startNumber");
1017 rep->fragment_duration = (int64_t) strtoll(duration_val, NULL, 10);
1018 av_log(s, AV_LOG_TRACE, "rep->fragment_duration = [%"PRId64"]\n", rep->fragment_duration);
1019 xmlFree(duration_val);
1021 if (timescale_val) {
1022 rep->fragment_timescale = (int64_t) strtoll(timescale_val, NULL, 10);
1023 av_log(s, AV_LOG_TRACE, "rep->fragment_timescale = [%"PRId64"]\n", rep->fragment_timescale);
1024 xmlFree(timescale_val);
1026 if (startnumber_val) {
1027 rep->start_number = rep->first_seq_no = (int64_t) strtoll(startnumber_val, NULL, 10);
1028 av_log(s, AV_LOG_TRACE, "rep->first_seq_no = [%"PRId64"]\n", rep->first_seq_no);
1029 xmlFree(startnumber_val);
1032 fragmenturl_node = xmlFirstElementChild(representation_segmentlist_node);
1033 while (fragmenturl_node) {
1034 ret = parse_manifest_segmenturlnode(s, rep, fragmenturl_node,
1041 fragmenturl_node = xmlNextElementSibling(fragmenturl_node);
1044 fragment_timeline_node = find_child_node_by_name(adaptionset_segmentlist_node, "SegmentTimeline");
1045 if (!fragment_timeline_node)
1046 fragment_timeline_node = find_child_node_by_name(period_segmentlist_node, "SegmentTimeline");
1047 if (fragment_timeline_node) {
1048 fragment_timeline_node = xmlFirstElementChild(fragment_timeline_node);
1049 while (fragment_timeline_node) {
1050 ret = parse_manifest_segmenttimeline(s, rep, fragment_timeline_node);
1054 fragment_timeline_node = xmlNextElementSibling(fragment_timeline_node);
1058 free_representation(rep);
1060 av_log(s, AV_LOG_ERROR, "Unknown format of Representation node id[%s] \n", (const char *)rep_id_val);
1064 if (rep->fragment_duration > 0 && !rep->fragment_timescale)
1065 rep->fragment_timescale = 1;
1066 rep->bandwidth = rep_bandwidth_val ? atoi(rep_bandwidth_val) : 0;
1067 strncpy(rep->id, rep_id_val ? rep_id_val : "", sizeof(rep->id));
1068 rep->framerate = av_make_q(0, 0);
1069 if (type == AVMEDIA_TYPE_VIDEO && rep_framerate_val) {
1070 ret = av_parse_video_rate(&rep->framerate, rep_framerate_val);
1072 av_log(s, AV_LOG_VERBOSE, "Ignoring invalid frame rate '%s'\n", rep_framerate_val);
1076 case AVMEDIA_TYPE_VIDEO:
1077 rep->rep_idx = video_rep_idx;
1078 dynarray_add(&c->videos, &c->n_videos, rep);
1080 case AVMEDIA_TYPE_AUDIO:
1081 rep->rep_idx = audio_rep_idx;
1082 dynarray_add(&c->audios, &c->n_audios, rep);
1084 case AVMEDIA_TYPE_SUBTITLE:
1085 rep->rep_idx = subtitle_rep_idx;
1086 dynarray_add(&c->subtitles, &c->n_subtitles, rep);
1089 av_log(s, AV_LOG_WARNING, "Unsupported the stream type %d\n", type);
1095 video_rep_idx += type == AVMEDIA_TYPE_VIDEO;
1096 audio_rep_idx += type == AVMEDIA_TYPE_AUDIO;
1097 subtitle_rep_idx += type == AVMEDIA_TYPE_SUBTITLE;
1101 xmlFree(rep_id_val);
1102 if (rep_bandwidth_val)
1103 xmlFree(rep_bandwidth_val);
1104 if (rep_framerate_val)
1105 xmlFree(rep_framerate_val);
1110 static int parse_manifest_adaptationset_attr(AVFormatContext *s, xmlNodePtr adaptionset_node)
1112 DASHContext *c = s->priv_data;
1114 if (!adaptionset_node) {
1115 av_log(s, AV_LOG_WARNING, "Cannot get AdaptionSet\n");
1116 return AVERROR(EINVAL);
1118 c->adaptionset_lang = xmlGetProp(adaptionset_node, "lang");
1123 static int parse_manifest_adaptationset(AVFormatContext *s, const char *url,
1124 xmlNodePtr adaptionset_node,
1125 xmlNodePtr mpd_baseurl_node,
1126 xmlNodePtr period_baseurl_node,
1127 xmlNodePtr period_segmenttemplate_node,
1128 xmlNodePtr period_segmentlist_node)
1131 DASHContext *c = s->priv_data;
1132 xmlNodePtr fragment_template_node = NULL;
1133 xmlNodePtr content_component_node = NULL;
1134 xmlNodePtr adaptionset_baseurl_node = NULL;
1135 xmlNodePtr adaptionset_segmentlist_node = NULL;
1136 xmlNodePtr adaptionset_supplementalproperty_node = NULL;
1137 xmlNodePtr node = NULL;
1139 ret = parse_manifest_adaptationset_attr(s, adaptionset_node);
1143 node = xmlFirstElementChild(adaptionset_node);
1145 if (!av_strcasecmp(node->name, (const char *)"SegmentTemplate")) {
1146 fragment_template_node = node;
1147 } else if (!av_strcasecmp(node->name, (const char *)"ContentComponent")) {
1148 content_component_node = node;
1149 } else if (!av_strcasecmp(node->name, (const char *)"BaseURL")) {
1150 adaptionset_baseurl_node = node;
1151 } else if (!av_strcasecmp(node->name, (const char *)"SegmentList")) {
1152 adaptionset_segmentlist_node = node;
1153 } else if (!av_strcasecmp(node->name, (const char *)"SupplementalProperty")) {
1154 adaptionset_supplementalproperty_node = node;
1155 } else if (!av_strcasecmp(node->name, (const char *)"Representation")) {
1156 ret = parse_manifest_representation(s, url, node,
1159 period_baseurl_node,
1160 period_segmenttemplate_node,
1161 period_segmentlist_node,
1162 fragment_template_node,
1163 content_component_node,
1164 adaptionset_baseurl_node,
1165 adaptionset_segmentlist_node,
1166 adaptionset_supplementalproperty_node);
1170 node = xmlNextElementSibling(node);
1174 av_freep(&c->adaptionset_lang);
1178 static int parse_programinformation(AVFormatContext *s, xmlNodePtr node)
1180 xmlChar *val = NULL;
1182 node = xmlFirstElementChild(node);
1184 if (!av_strcasecmp(node->name, "Title")) {
1185 val = xmlNodeGetContent(node);
1187 av_dict_set(&s->metadata, "Title", val, 0);
1189 } else if (!av_strcasecmp(node->name, "Source")) {
1190 val = xmlNodeGetContent(node);
1192 av_dict_set(&s->metadata, "Source", val, 0);
1194 } else if (!av_strcasecmp(node->name, "Copyright")) {
1195 val = xmlNodeGetContent(node);
1197 av_dict_set(&s->metadata, "Copyright", val, 0);
1200 node = xmlNextElementSibling(node);
1207 static int parse_manifest(AVFormatContext *s, const char *url, AVIOContext *in)
1209 DASHContext *c = s->priv_data;
1212 uint8_t *new_url = NULL;
1213 int64_t filesize = 0;
1215 AVDictionary *opts = NULL;
1217 xmlNodePtr root_element = NULL;
1218 xmlNodePtr node = NULL;
1219 xmlNodePtr period_node = NULL;
1220 xmlNodePtr tmp_node = NULL;
1221 xmlNodePtr mpd_baseurl_node = NULL;
1222 xmlNodePtr period_baseurl_node = NULL;
1223 xmlNodePtr period_segmenttemplate_node = NULL;
1224 xmlNodePtr period_segmentlist_node = NULL;
1225 xmlNodePtr adaptionset_node = NULL;
1226 xmlAttrPtr attr = NULL;
1228 uint32_t period_duration_sec = 0;
1229 uint32_t period_start_sec = 0;
1234 av_dict_copy(&opts, c->avio_opts, 0);
1235 ret = avio_open2(&in, url, AVIO_FLAG_READ, c->interrupt_callback, &opts);
1236 av_dict_free(&opts);
1241 if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >= 0) {
1242 c->base_url = av_strdup(new_url);
1244 c->base_url = av_strdup(url);
1247 filesize = avio_size(in);
1248 filesize = filesize > 0 ? filesize : DEFAULT_MANIFEST_SIZE;
1250 if (filesize > MAX_BPRINT_READ_SIZE) {
1251 av_log(s, AV_LOG_ERROR, "Manifest too large: %"PRId64"\n", filesize);
1252 return AVERROR_INVALIDDATA;
1255 av_bprint_init(&buf, filesize + 1, AV_BPRINT_SIZE_UNLIMITED);
1257 if ((ret = avio_read_to_bprint(in, &buf, MAX_BPRINT_READ_SIZE)) < 0 ||
1259 (filesize = buf.len) == 0) {
1260 av_log(s, AV_LOG_ERROR, "Unable to read to manifest '%s'\n", url);
1262 ret = AVERROR_INVALIDDATA;
1266 doc = xmlReadMemory(buf.str, filesize, c->base_url, NULL, 0);
1267 root_element = xmlDocGetRootElement(doc);
1268 node = root_element;
1271 ret = AVERROR_INVALIDDATA;
1272 av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing root node\n", url);
1276 if (node->type != XML_ELEMENT_NODE ||
1277 av_strcasecmp(node->name, (const char *)"MPD")) {
1278 ret = AVERROR_INVALIDDATA;
1279 av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - wrong root node name[%s] type[%d]\n", url, node->name, (int)node->type);
1283 val = xmlGetProp(node, "type");
1285 av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing type attrib\n", url);
1286 ret = AVERROR_INVALIDDATA;
1289 if (!av_strcasecmp(val, (const char *)"dynamic"))
1293 attr = node->properties;
1295 val = xmlGetProp(node, attr->name);
1297 if (!av_strcasecmp(attr->name, (const char *)"availabilityStartTime")) {
1298 c->availability_start_time = get_utc_date_time_insec(s, (const char *)val);
1299 av_log(s, AV_LOG_TRACE, "c->availability_start_time = [%"PRId64"]\n", c->availability_start_time);
1300 } else if (!av_strcasecmp(attr->name, (const char *)"availabilityEndTime")) {
1301 c->availability_end_time = get_utc_date_time_insec(s, (const char *)val);
1302 av_log(s, AV_LOG_TRACE, "c->availability_end_time = [%"PRId64"]\n", c->availability_end_time);
1303 } else if (!av_strcasecmp(attr->name, (const char *)"publishTime")) {
1304 c->publish_time = get_utc_date_time_insec(s, (const char *)val);
1305 av_log(s, AV_LOG_TRACE, "c->publish_time = [%"PRId64"]\n", c->publish_time);
1306 } else if (!av_strcasecmp(attr->name, (const char *)"minimumUpdatePeriod")) {
1307 c->minimum_update_period = get_duration_insec(s, (const char *)val);
1308 av_log(s, AV_LOG_TRACE, "c->minimum_update_period = [%"PRId64"]\n", c->minimum_update_period);
1309 } else if (!av_strcasecmp(attr->name, (const char *)"timeShiftBufferDepth")) {
1310 c->time_shift_buffer_depth = get_duration_insec(s, (const char *)val);
1311 av_log(s, AV_LOG_TRACE, "c->time_shift_buffer_depth = [%"PRId64"]\n", c->time_shift_buffer_depth);
1312 } else if (!av_strcasecmp(attr->name, (const char *)"minBufferTime")) {
1313 c->min_buffer_time = get_duration_insec(s, (const char *)val);
1314 av_log(s, AV_LOG_TRACE, "c->min_buffer_time = [%"PRId64"]\n", c->min_buffer_time);
1315 } else if (!av_strcasecmp(attr->name, (const char *)"suggestedPresentationDelay")) {
1316 c->suggested_presentation_delay = get_duration_insec(s, (const char *)val);
1317 av_log(s, AV_LOG_TRACE, "c->suggested_presentation_delay = [%"PRId64"]\n", c->suggested_presentation_delay);
1318 } else if (!av_strcasecmp(attr->name, (const char *)"mediaPresentationDuration")) {
1319 c->media_presentation_duration = get_duration_insec(s, (const char *)val);
1320 av_log(s, AV_LOG_TRACE, "c->media_presentation_duration = [%"PRId64"]\n", c->media_presentation_duration);
1326 tmp_node = find_child_node_by_name(node, "BaseURL");
1328 mpd_baseurl_node = xmlCopyNode(tmp_node,1);
1330 mpd_baseurl_node = xmlNewNode(NULL, "BaseURL");
1333 // at now we can handle only one period, with the longest duration
1334 node = xmlFirstElementChild(node);
1336 if (!av_strcasecmp(node->name, (const char *)"Period")) {
1337 period_duration_sec = 0;
1338 period_start_sec = 0;
1339 attr = node->properties;
1341 val = xmlGetProp(node, attr->name);
1342 if (!av_strcasecmp(attr->name, (const char *)"duration")) {
1343 period_duration_sec = get_duration_insec(s, (const char *)val);
1344 } else if (!av_strcasecmp(attr->name, (const char *)"start")) {
1345 period_start_sec = get_duration_insec(s, (const char *)val);
1350 if ((period_duration_sec) >= (c->period_duration)) {
1352 c->period_duration = period_duration_sec;
1353 c->period_start = period_start_sec;
1354 if (c->period_start > 0)
1355 c->media_presentation_duration = c->period_duration;
1357 } else if (!av_strcasecmp(node->name, "ProgramInformation")) {
1358 parse_programinformation(s, node);
1360 node = xmlNextElementSibling(node);
1363 av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing Period node\n", url);
1364 ret = AVERROR_INVALIDDATA;
1368 adaptionset_node = xmlFirstElementChild(period_node);
1369 while (adaptionset_node) {
1370 if (!av_strcasecmp(adaptionset_node->name, (const char *)"BaseURL")) {
1371 period_baseurl_node = adaptionset_node;
1372 } else if (!av_strcasecmp(adaptionset_node->name, (const char *)"SegmentTemplate")) {
1373 period_segmenttemplate_node = adaptionset_node;
1374 } else if (!av_strcasecmp(adaptionset_node->name, (const char *)"SegmentList")) {
1375 period_segmentlist_node = adaptionset_node;
1376 } else if (!av_strcasecmp(adaptionset_node->name, (const char *)"AdaptationSet")) {
1377 parse_manifest_adaptationset(s, url, adaptionset_node, mpd_baseurl_node, period_baseurl_node, period_segmenttemplate_node, period_segmentlist_node);
1379 adaptionset_node = xmlNextElementSibling(adaptionset_node);
1382 /*free the document */
1385 xmlFreeNode(mpd_baseurl_node);
1389 av_bprint_finalize(&buf, NULL);
1396 static int64_t calc_cur_seg_no(AVFormatContext *s, struct representation *pls)
1398 DASHContext *c = s->priv_data;
1400 int64_t start_time_offset = 0;
1403 if (pls->n_fragments) {
1404 av_log(s, AV_LOG_TRACE, "in n_fragments mode\n");
1405 num = pls->first_seq_no;
1406 } else if (pls->n_timelines) {
1407 av_log(s, AV_LOG_TRACE, "in n_timelines mode\n");
1408 start_time_offset = get_segment_start_time_based_on_timeline(pls, 0xFFFFFFFF) - 60 * pls->fragment_timescale; // 60 seconds before end
1409 num = calc_next_seg_no_from_timelines(pls, start_time_offset);
1411 num = pls->first_seq_no;
1413 num += pls->first_seq_no;
1414 } else if (pls->fragment_duration){
1415 av_log(s, AV_LOG_TRACE, "in fragment_duration mode fragment_timescale = %"PRId64", presentation_timeoffset = %"PRId64"\n", pls->fragment_timescale, pls->presentation_timeoffset);
1416 if (pls->presentation_timeoffset) {
1417 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;
1418 } else if (c->publish_time > 0 && !c->availability_start_time) {
1419 if (c->min_buffer_time) {
1420 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;
1422 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;
1425 num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time) - c->suggested_presentation_delay) * pls->fragment_timescale) / pls->fragment_duration;
1429 num = pls->first_seq_no;
1434 static int64_t calc_min_seg_no(AVFormatContext *s, struct representation *pls)
1436 DASHContext *c = s->priv_data;
1439 if (c->is_live && pls->fragment_duration) {
1440 av_log(s, AV_LOG_TRACE, "in live mode\n");
1441 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;
1443 num = pls->first_seq_no;
1448 static int64_t calc_max_seg_no(struct representation *pls, DASHContext *c)
1452 if (pls->n_fragments) {
1453 num = pls->first_seq_no + pls->n_fragments - 1;
1454 } else if (pls->n_timelines) {
1456 num = pls->first_seq_no + pls->n_timelines - 1;
1457 for (i = 0; i < pls->n_timelines; i++) {
1458 if (pls->timelines[i]->repeat == -1) {
1459 int length_of_each_segment = pls->timelines[i]->duration / pls->fragment_timescale;
1460 num = c->period_duration / length_of_each_segment;
1462 num += pls->timelines[i]->repeat;
1465 } else if (c->is_live && pls->fragment_duration) {
1466 num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time)) * pls->fragment_timescale) / pls->fragment_duration;
1467 } else if (pls->fragment_duration) {
1468 num = pls->first_seq_no + (c->media_presentation_duration * pls->fragment_timescale) / pls->fragment_duration;
1474 static void move_timelines(struct representation *rep_src, struct representation *rep_dest, DASHContext *c)
1476 if (rep_dest && rep_src ) {
1477 free_timelines_list(rep_dest);
1478 rep_dest->timelines = rep_src->timelines;
1479 rep_dest->n_timelines = rep_src->n_timelines;
1480 rep_dest->first_seq_no = rep_src->first_seq_no;
1481 rep_dest->last_seq_no = calc_max_seg_no(rep_dest, c);
1482 rep_src->timelines = NULL;
1483 rep_src->n_timelines = 0;
1484 rep_dest->cur_seq_no = rep_src->cur_seq_no;
1488 static void move_segments(struct representation *rep_src, struct representation *rep_dest, DASHContext *c)
1490 if (rep_dest && rep_src ) {
1491 free_fragment_list(rep_dest);
1492 if (rep_src->start_number > (rep_dest->start_number + rep_dest->n_fragments))
1493 rep_dest->cur_seq_no = 0;
1495 rep_dest->cur_seq_no += rep_src->start_number - rep_dest->start_number;
1496 rep_dest->fragments = rep_src->fragments;
1497 rep_dest->n_fragments = rep_src->n_fragments;
1498 rep_dest->parent = rep_src->parent;
1499 rep_dest->last_seq_no = calc_max_seg_no(rep_dest, c);
1500 rep_src->fragments = NULL;
1501 rep_src->n_fragments = 0;
1506 static int refresh_manifest(AVFormatContext *s)
1509 DASHContext *c = s->priv_data;
1510 // save current context
1511 int n_videos = c->n_videos;
1512 struct representation **videos = c->videos;
1513 int n_audios = c->n_audios;
1514 struct representation **audios = c->audios;
1515 int n_subtitles = c->n_subtitles;
1516 struct representation **subtitles = c->subtitles;
1517 char *base_url = c->base_url;
1525 c->subtitles = NULL;
1526 ret = parse_manifest(s, s->url, NULL);
1530 if (c->n_videos != n_videos) {
1531 av_log(c, AV_LOG_ERROR,
1532 "new manifest has mismatched no. of video representations, %d -> %d\n",
1533 n_videos, c->n_videos);
1534 return AVERROR_INVALIDDATA;
1536 if (c->n_audios != n_audios) {
1537 av_log(c, AV_LOG_ERROR,
1538 "new manifest has mismatched no. of audio representations, %d -> %d\n",
1539 n_audios, c->n_audios);
1540 return AVERROR_INVALIDDATA;
1542 if (c->n_subtitles != n_subtitles) {
1543 av_log(c, AV_LOG_ERROR,
1544 "new manifest has mismatched no. of subtitles representations, %d -> %d\n",
1545 n_subtitles, c->n_subtitles);
1546 return AVERROR_INVALIDDATA;
1549 for (i = 0; i < n_videos; i++) {
1550 struct representation *cur_video = videos[i];
1551 struct representation *ccur_video = c->videos[i];
1552 if (cur_video->timelines) {
1553 // calc current time
1554 int64_t currentTime = get_segment_start_time_based_on_timeline(cur_video, cur_video->cur_seq_no) / cur_video->fragment_timescale;
1556 ccur_video->cur_seq_no = calc_next_seg_no_from_timelines(ccur_video, currentTime * cur_video->fragment_timescale - 1);
1557 if (ccur_video->cur_seq_no >= 0) {
1558 move_timelines(ccur_video, cur_video, c);
1561 if (cur_video->fragments) {
1562 move_segments(ccur_video, cur_video, c);
1565 for (i = 0; i < n_audios; i++) {
1566 struct representation *cur_audio = audios[i];
1567 struct representation *ccur_audio = c->audios[i];
1568 if (cur_audio->timelines) {
1569 // calc current time
1570 int64_t currentTime = get_segment_start_time_based_on_timeline(cur_audio, cur_audio->cur_seq_no) / cur_audio->fragment_timescale;
1572 ccur_audio->cur_seq_no = calc_next_seg_no_from_timelines(ccur_audio, currentTime * cur_audio->fragment_timescale - 1);
1573 if (ccur_audio->cur_seq_no >= 0) {
1574 move_timelines(ccur_audio, cur_audio, c);
1577 if (cur_audio->fragments) {
1578 move_segments(ccur_audio, cur_audio, c);
1587 c->base_url = base_url;
1590 free_subtitle_list(c);
1596 c->n_subtitles = n_subtitles;
1597 c->subtitles = subtitles;
1598 c->n_audios = n_audios;
1600 c->n_videos = n_videos;
1605 static struct fragment *get_current_fragment(struct representation *pls)
1607 int64_t min_seq_no = 0;
1608 int64_t max_seq_no = 0;
1609 struct fragment *seg = NULL;
1610 struct fragment *seg_ptr = NULL;
1611 DASHContext *c = pls->parent->priv_data;
1613 while (( !ff_check_interrupt(c->interrupt_callback)&& pls->n_fragments > 0)) {
1614 if (pls->cur_seq_no < pls->n_fragments) {
1615 seg_ptr = pls->fragments[pls->cur_seq_no];
1616 seg = av_mallocz(sizeof(struct fragment));
1620 seg->url = av_strdup(seg_ptr->url);
1625 seg->size = seg_ptr->size;
1626 seg->url_offset = seg_ptr->url_offset;
1628 } else if (c->is_live) {
1629 refresh_manifest(pls->parent);
1635 min_seq_no = calc_min_seg_no(pls->parent, pls);
1636 max_seq_no = calc_max_seg_no(pls, c);
1638 if (pls->timelines || pls->fragments) {
1639 refresh_manifest(pls->parent);
1641 if (pls->cur_seq_no <= min_seq_no) {
1642 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);
1643 pls->cur_seq_no = calc_cur_seg_no(pls->parent, pls);
1644 } else if (pls->cur_seq_no > max_seq_no) {
1645 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);
1647 seg = av_mallocz(sizeof(struct fragment));
1651 } else if (pls->cur_seq_no <= pls->last_seq_no) {
1652 seg = av_mallocz(sizeof(struct fragment));
1658 char *tmpfilename= av_mallocz(c->max_url_size);
1662 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));
1663 seg->url = av_strireplace(pls->url_template, pls->url_template, tmpfilename);
1665 av_log(pls->parent, AV_LOG_WARNING, "Unable to resolve template url '%s', try to use origin template\n", pls->url_template);
1666 seg->url = av_strdup(pls->url_template);
1668 av_log(pls->parent, AV_LOG_ERROR, "Cannot resolve template url '%s'\n", pls->url_template);
1669 av_free(tmpfilename);
1673 av_free(tmpfilename);
1680 static int read_from_url(struct representation *pls, struct fragment *seg,
1681 uint8_t *buf, int buf_size)
1685 /* limit read if the fragment was only a part of a file */
1687 buf_size = FFMIN(buf_size, pls->cur_seg_size - pls->cur_seg_offset);
1689 ret = avio_read(pls->input, buf, buf_size);
1691 pls->cur_seg_offset += ret;
1696 static int open_input(DASHContext *c, struct representation *pls, struct fragment *seg)
1698 AVDictionary *opts = NULL;
1702 url = av_mallocz(c->max_url_size);
1704 ret = AVERROR(ENOMEM);
1708 if (seg->size >= 0) {
1709 /* try to restrict the HTTP request to the part we want
1710 * (if this is in fact a HTTP request) */
1711 av_dict_set_int(&opts, "offset", seg->url_offset, 0);
1712 av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
1715 ff_make_absolute_url(url, c->max_url_size, c->base_url, seg->url);
1716 av_log(pls->parent, AV_LOG_VERBOSE, "DASH request for url '%s', offset %"PRId64", playlist %d\n",
1717 url, seg->url_offset, pls->rep_idx);
1718 ret = open_url(pls->parent, &pls->input, url, c->avio_opts, opts, NULL);
1722 av_dict_free(&opts);
1723 pls->cur_seg_offset = 0;
1724 pls->cur_seg_size = seg->size;
1728 static int update_init_section(struct representation *pls)
1730 static const int max_init_section_size = 1024 * 1024;
1731 DASHContext *c = pls->parent->priv_data;
1736 if (!pls->init_section || pls->init_sec_buf)
1739 ret = open_input(c, pls, pls->init_section);
1741 av_log(pls->parent, AV_LOG_WARNING,
1742 "Failed to open an initialization section in playlist %d\n",
1747 if (pls->init_section->size >= 0)
1748 sec_size = pls->init_section->size;
1749 else if ((urlsize = avio_size(pls->input)) >= 0)
1752 sec_size = max_init_section_size;
1754 av_log(pls->parent, AV_LOG_DEBUG,
1755 "Downloading an initialization section of size %"PRId64"\n",
1758 sec_size = FFMIN(sec_size, max_init_section_size);
1760 av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size);
1762 ret = read_from_url(pls, pls->init_section, pls->init_sec_buf,
1763 pls->init_sec_buf_size);
1764 ff_format_io_close(pls->parent, &pls->input);
1769 pls->init_sec_data_len = ret;
1770 pls->init_sec_buf_read_offset = 0;
1775 static int64_t seek_data(void *opaque, int64_t offset, int whence)
1777 struct representation *v = opaque;
1778 if (v->n_fragments && !v->init_sec_data_len) {
1779 return avio_seek(v->input, offset, whence);
1782 return AVERROR(ENOSYS);
1785 static int read_data(void *opaque, uint8_t *buf, int buf_size)
1788 struct representation *v = opaque;
1789 DASHContext *c = v->parent->priv_data;
1793 free_fragment(&v->cur_seg);
1794 v->cur_seg = get_current_fragment(v);
1800 /* load/update Media Initialization Section, if any */
1801 ret = update_init_section(v);
1805 ret = open_input(c, v, v->cur_seg);
1807 if (ff_check_interrupt(c->interrupt_callback)) {
1811 av_log(v->parent, AV_LOG_WARNING, "Failed to open fragment of playlist %d\n", v->rep_idx);
1817 if (v->init_sec_buf_read_offset < v->init_sec_data_len) {
1818 /* Push init section out first before first actual fragment */
1819 int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size);
1820 memcpy(buf, v->init_sec_buf, copy_size);
1821 v->init_sec_buf_read_offset += copy_size;
1826 /* check the v->cur_seg, if it is null, get current and double check if the new v->cur_seg*/
1828 v->cur_seg = get_current_fragment(v);
1834 ret = read_from_url(v, v->cur_seg, buf, buf_size);
1838 if (c->is_live || v->cur_seq_no < v->last_seq_no) {
1839 if (!v->is_restart_needed)
1841 v->is_restart_needed = 1;
1848 static int save_avio_options(AVFormatContext *s)
1850 DASHContext *c = s->priv_data;
1851 const char *opts[] = {
1852 "headers", "user_agent", "cookies", "http_proxy", "referer", "rw_timeout", "icy", NULL };
1853 const char **opt = opts;
1854 uint8_t *buf = NULL;
1858 if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN, &buf) >= 0) {
1859 if (buf[0] != '\0') {
1860 ret = av_dict_set(&c->avio_opts, *opt, buf, AV_DICT_DONT_STRDUP_VAL);
1873 static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url,
1874 int flags, AVDictionary **opts)
1876 av_log(s, AV_LOG_ERROR,
1877 "A DASH playlist item '%s' referred to an external file '%s'. "
1878 "Opening this file was forbidden for security reasons\n",
1880 return AVERROR(EPERM);
1883 static void close_demux_for_component(struct representation *pls)
1885 /* note: the internal buffer could have changed */
1886 av_freep(&pls->pb.buffer);
1887 memset(&pls->pb, 0x00, sizeof(AVIOContext));
1888 pls->ctx->pb = NULL;
1889 avformat_close_input(&pls->ctx);
1892 static int reopen_demux_for_component(AVFormatContext *s, struct representation *pls)
1894 DASHContext *c = s->priv_data;
1895 ff_const59 AVInputFormat *in_fmt = NULL;
1896 AVDictionary *in_fmt_opts = NULL;
1897 uint8_t *avio_ctx_buffer = NULL;
1901 close_demux_for_component(pls);
1904 if (ff_check_interrupt(&s->interrupt_callback)) {
1909 if (!(pls->ctx = avformat_alloc_context())) {
1910 ret = AVERROR(ENOMEM);
1914 avio_ctx_buffer = av_malloc(INITIAL_BUFFER_SIZE);
1915 if (!avio_ctx_buffer ) {
1916 ret = AVERROR(ENOMEM);
1917 avformat_free_context(pls->ctx);
1922 ffio_init_context(&pls->pb, avio_ctx_buffer , INITIAL_BUFFER_SIZE, 0, pls, read_data, NULL, NULL);
1924 ffio_init_context(&pls->pb, avio_ctx_buffer , INITIAL_BUFFER_SIZE, 0, pls, read_data, NULL, seek_data);
1926 pls->pb.seekable = 0;
1928 if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
1931 pls->ctx->flags = AVFMT_FLAG_CUSTOM_IO;
1932 pls->ctx->probesize = s->probesize > 0 ? s->probesize : 1024 * 4;
1933 pls->ctx->max_analyze_duration = s->max_analyze_duration > 0 ? s->max_analyze_duration : 4 * AV_TIME_BASE;
1934 pls->ctx->interrupt_callback = s->interrupt_callback;
1935 ret = av_probe_input_buffer(&pls->pb, &in_fmt, "", NULL, 0, 0);
1937 av_log(s, AV_LOG_ERROR, "Error when loading first fragment, playlist %d\n", (int)pls->rep_idx);
1938 avformat_free_context(pls->ctx);
1943 pls->ctx->pb = &pls->pb;
1944 pls->ctx->io_open = nested_io_open;
1946 // provide additional information from mpd if available
1947 ret = avformat_open_input(&pls->ctx, "", in_fmt, &in_fmt_opts); //pls->init_section->url
1948 av_dict_free(&in_fmt_opts);
1951 if (pls->n_fragments) {
1952 #if FF_API_R_FRAME_RATE
1953 if (pls->framerate.den) {
1954 for (i = 0; i < pls->ctx->nb_streams; i++)
1955 pls->ctx->streams[i]->r_frame_rate = pls->framerate;
1958 ret = avformat_find_stream_info(pls->ctx, NULL);
1967 static int open_demux_for_component(AVFormatContext *s, struct representation *pls)
1973 pls->cur_seq_no = calc_cur_seg_no(s, pls);
1975 if (!pls->last_seq_no) {
1976 pls->last_seq_no = calc_max_seg_no(pls, s->priv_data);
1979 ret = reopen_demux_for_component(s, pls);
1983 for (i = 0; i < pls->ctx->nb_streams; i++) {
1984 AVStream *st = avformat_new_stream(s, NULL);
1985 AVStream *ist = pls->ctx->streams[i];
1987 ret = AVERROR(ENOMEM);
1991 avcodec_parameters_copy(st->codecpar, ist->codecpar);
1992 avpriv_set_pts_info(st, ist->pts_wrap_bits, ist->time_base.num, ist->time_base.den);
1995 st->disposition = ist->disposition;
1998 for (int i = 0; i < ist->nb_side_data; i++) {
1999 const AVPacketSideData *sd_src = &ist->side_data[i];
2002 dst_data = av_stream_new_side_data(st, sd_src->type, sd_src->size);
2004 return AVERROR(ENOMEM);
2005 memcpy(dst_data, sd_src->data, sd_src->size);
2014 static int is_common_init_section_exist(struct representation **pls, int n_pls)
2016 struct fragment *first_init_section = pls[0]->init_section;
2018 int64_t url_offset = -1;
2022 if (first_init_section == NULL || n_pls == 0)
2025 url = first_init_section->url;
2026 url_offset = first_init_section->url_offset;
2027 size = pls[0]->init_section->size;
2028 for (i=0;i<n_pls;i++) {
2029 if (av_strcasecmp(pls[i]->init_section->url,url) || pls[i]->init_section->url_offset != url_offset || pls[i]->init_section->size != size) {
2036 static int copy_init_section(struct representation *rep_dest, struct representation *rep_src)
2038 rep_dest->init_sec_buf = av_mallocz(rep_src->init_sec_buf_size);
2039 if (!rep_dest->init_sec_buf) {
2040 av_log(rep_dest->ctx, AV_LOG_WARNING, "Cannot alloc memory for init_sec_buf\n");
2041 return AVERROR(ENOMEM);
2043 memcpy(rep_dest->init_sec_buf, rep_src->init_sec_buf, rep_src->init_sec_data_len);
2044 rep_dest->init_sec_buf_size = rep_src->init_sec_buf_size;
2045 rep_dest->init_sec_data_len = rep_src->init_sec_data_len;
2046 rep_dest->cur_timestamp = rep_src->cur_timestamp;
2052 static int dash_read_header(AVFormatContext *s)
2054 DASHContext *c = s->priv_data;
2055 struct representation *rep;
2057 int stream_index = 0;
2060 c->interrupt_callback = &s->interrupt_callback;
2062 if ((ret = save_avio_options(s)) < 0)
2065 if ((ret = parse_manifest(s, s->url, s->pb)) < 0)
2068 /* If this isn't a live stream, fill the total duration of the
2071 s->duration = (int64_t) c->media_presentation_duration * AV_TIME_BASE;
2073 av_dict_set(&c->avio_opts, "seekable", "0", 0);
2077 c->is_init_section_common_video = is_common_init_section_exist(c->videos, c->n_videos);
2079 /* Open the demuxer for video and audio components if available */
2080 for (i = 0; i < c->n_videos; i++) {
2082 if (i > 0 && c->is_init_section_common_video) {
2083 ret = copy_init_section(rep, c->videos[0]);
2087 ret = open_demux_for_component(s, rep);
2091 rep->stream_index = stream_index;
2096 c->is_init_section_common_audio = is_common_init_section_exist(c->audios, c->n_audios);
2098 for (i = 0; i < c->n_audios; i++) {
2100 if (i > 0 && c->is_init_section_common_audio) {
2101 ret = copy_init_section(rep, c->audios[0]);
2105 ret = open_demux_for_component(s, rep);
2109 rep->stream_index = stream_index;
2114 c->is_init_section_common_audio = is_common_init_section_exist(c->subtitles, c->n_subtitles);
2116 for (i = 0; i < c->n_subtitles; i++) {
2117 rep = c->subtitles[i];
2118 if (i > 0 && c->is_init_section_common_audio) {
2119 ret = copy_init_section(rep, c->subtitles[0]);
2123 ret = open_demux_for_component(s, rep);
2127 rep->stream_index = stream_index;
2131 if (!stream_index) {
2132 ret = AVERROR_INVALIDDATA;
2136 /* Create a program */
2139 program = av_new_program(s, 0);
2144 for (i = 0; i < c->n_videos; i++) {
2146 av_program_add_stream_index(s, 0, rep->stream_index);
2147 rep->assoc_stream = s->streams[rep->stream_index];
2148 if (rep->bandwidth > 0)
2149 av_dict_set_int(&rep->assoc_stream->metadata, "variant_bitrate", rep->bandwidth, 0);
2151 av_dict_set(&rep->assoc_stream->metadata, "id", rep->id, 0);
2153 for (i = 0; i < c->n_audios; i++) {
2155 av_program_add_stream_index(s, 0, rep->stream_index);
2156 rep->assoc_stream = s->streams[rep->stream_index];
2157 if (rep->bandwidth > 0)
2158 av_dict_set_int(&rep->assoc_stream->metadata, "variant_bitrate", rep->bandwidth, 0);
2160 av_dict_set(&rep->assoc_stream->metadata, "id", rep->id, 0);
2162 av_dict_set(&rep->assoc_stream->metadata, "language", rep->lang, 0);
2163 av_freep(&rep->lang);
2166 for (i = 0; i < c->n_subtitles; i++) {
2167 rep = c->subtitles[i];
2168 av_program_add_stream_index(s, 0, rep->stream_index);
2169 rep->assoc_stream = s->streams[rep->stream_index];
2171 av_dict_set(&rep->assoc_stream->metadata, "id", rep->id, 0);
2173 av_dict_set(&rep->assoc_stream->metadata, "language", rep->lang, 0);
2174 av_freep(&rep->lang);
2184 static void recheck_discard_flags(AVFormatContext *s, struct representation **p, int n)
2188 for (i = 0; i < n; i++) {
2189 struct representation *pls = p[i];
2190 int needed = !pls->assoc_stream || pls->assoc_stream->discard < AVDISCARD_ALL;
2192 if (needed && !pls->ctx) {
2193 pls->cur_seg_offset = 0;
2194 pls->init_sec_buf_read_offset = 0;
2196 for (j = 0; j < n; j++) {
2197 pls->cur_seq_no = FFMAX(pls->cur_seq_no, p[j]->cur_seq_no);
2199 reopen_demux_for_component(s, pls);
2200 av_log(s, AV_LOG_INFO, "Now receiving stream_index %d\n", pls->stream_index);
2201 } else if (!needed && pls->ctx) {
2202 close_demux_for_component(pls);
2203 ff_format_io_close(pls->parent, &pls->input);
2204 av_log(s, AV_LOG_INFO, "No longer receiving stream_index %d\n", pls->stream_index);
2209 static int dash_read_packet(AVFormatContext *s, AVPacket *pkt)
2211 DASHContext *c = s->priv_data;
2214 struct representation *cur = NULL;
2215 struct representation *rep = NULL;
2217 recheck_discard_flags(s, c->videos, c->n_videos);
2218 recheck_discard_flags(s, c->audios, c->n_audios);
2219 recheck_discard_flags(s, c->subtitles, c->n_subtitles);
2221 for (i = 0; i < c->n_videos; i++) {
2225 if (!cur || rep->cur_timestamp < mints) {
2227 mints = rep->cur_timestamp;
2230 for (i = 0; i < c->n_audios; i++) {
2234 if (!cur || rep->cur_timestamp < mints) {
2236 mints = rep->cur_timestamp;
2240 for (i = 0; i < c->n_subtitles; i++) {
2241 rep = c->subtitles[i];
2244 if (!cur || rep->cur_timestamp < mints) {
2246 mints = rep->cur_timestamp;
2251 return AVERROR_INVALIDDATA;
2253 while (!ff_check_interrupt(c->interrupt_callback) && !ret) {
2254 ret = av_read_frame(cur->ctx, pkt);
2256 /* If we got a packet, return it */
2257 cur->cur_timestamp = av_rescale(pkt->pts, (int64_t)cur->ctx->streams[0]->time_base.num * 90000, cur->ctx->streams[0]->time_base.den);
2258 pkt->stream_index = cur->stream_index;
2261 if (cur->is_restart_needed) {
2262 cur->cur_seg_offset = 0;
2263 cur->init_sec_buf_read_offset = 0;
2264 ff_format_io_close(cur->parent, &cur->input);
2265 ret = reopen_demux_for_component(s, cur);
2266 cur->is_restart_needed = 0;
2272 static int dash_close(AVFormatContext *s)
2274 DASHContext *c = s->priv_data;
2277 free_subtitle_list(c);
2278 av_dict_free(&c->avio_opts);
2279 av_freep(&c->base_url);
2283 static int dash_seek(AVFormatContext *s, struct representation *pls, int64_t seek_pos_msec, int flags, int dry_run)
2288 int64_t duration = 0;
2290 av_log(pls->parent, AV_LOG_VERBOSE, "DASH seek pos[%"PRId64"ms], playlist %d%s\n",
2291 seek_pos_msec, pls->rep_idx, dry_run ? " (dry)" : "");
2293 // single fragment mode
2294 if (pls->n_fragments == 1) {
2295 pls->cur_timestamp = 0;
2296 pls->cur_seg_offset = 0;
2299 ff_read_frame_flush(pls->ctx);
2300 return av_seek_frame(pls->ctx, -1, seek_pos_msec * 1000, flags);
2303 ff_format_io_close(pls->parent, &pls->input);
2305 // find the nearest fragment
2306 if (pls->n_timelines > 0 && pls->fragment_timescale > 0) {
2307 int64_t num = pls->first_seq_no;
2308 av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with SegmentTimeline start n_timelines[%d] "
2309 "last_seq_no[%"PRId64"], playlist %d.\n",
2310 (int)pls->n_timelines, (int64_t)pls->last_seq_no, (int)pls->rep_idx);
2311 for (i = 0; i < pls->n_timelines; i++) {
2312 if (pls->timelines[i]->starttime > 0) {
2313 duration = pls->timelines[i]->starttime;
2315 duration += pls->timelines[i]->duration;
2316 if (seek_pos_msec < ((duration * 1000) / pls->fragment_timescale)) {
2319 for (j = 0; j < pls->timelines[i]->repeat; j++) {
2320 duration += pls->timelines[i]->duration;
2322 if (seek_pos_msec < ((duration * 1000) / pls->fragment_timescale)) {
2330 pls->cur_seq_no = num > pls->last_seq_no ? pls->last_seq_no : num;
2331 av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with SegmentTimeline end cur_seq_no[%"PRId64"], playlist %d.\n",
2332 (int64_t)pls->cur_seq_no, (int)pls->rep_idx);
2333 } else if (pls->fragment_duration > 0) {
2334 pls->cur_seq_no = pls->first_seq_no + ((seek_pos_msec * pls->fragment_timescale) / pls->fragment_duration) / 1000;
2336 av_log(pls->parent, AV_LOG_ERROR, "dash_seek missing timeline or fragment_duration\n");
2337 pls->cur_seq_no = pls->first_seq_no;
2339 pls->cur_timestamp = 0;
2340 pls->cur_seg_offset = 0;
2341 pls->init_sec_buf_read_offset = 0;
2342 ret = dry_run ? 0 : reopen_demux_for_component(s, pls);
2347 static int dash_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
2350 DASHContext *c = s->priv_data;
2351 int64_t seek_pos_msec = av_rescale_rnd(timestamp, 1000,
2352 s->streams[stream_index]->time_base.den,
2353 flags & AVSEEK_FLAG_BACKWARD ?
2354 AV_ROUND_DOWN : AV_ROUND_UP);
2355 if ((flags & AVSEEK_FLAG_BYTE) || c->is_live)
2356 return AVERROR(ENOSYS);
2358 /* Seek in discarded streams with dry_run=1 to avoid reopening them */
2359 for (i = 0; i < c->n_videos; i++) {
2361 ret = dash_seek(s, c->videos[i], seek_pos_msec, flags, !c->videos[i]->ctx);
2363 for (i = 0; i < c->n_audios; i++) {
2365 ret = dash_seek(s, c->audios[i], seek_pos_msec, flags, !c->audios[i]->ctx);
2367 for (i = 0; i < c->n_subtitles; i++) {
2369 ret = dash_seek(s, c->subtitles[i], seek_pos_msec, flags, !c->subtitles[i]->ctx);
2375 static int dash_probe(const AVProbeData *p)
2377 if (!av_stristr(p->buf, "<MPD"))
2380 if (av_stristr(p->buf, "dash:profile:isoff-on-demand:2011") ||
2381 av_stristr(p->buf, "dash:profile:isoff-live:2011") ||
2382 av_stristr(p->buf, "dash:profile:isoff-live:2012") ||
2383 av_stristr(p->buf, "dash:profile:isoff-main:2011") ||
2384 av_stristr(p->buf, "3GPP:PSS:profile:DASH1")) {
2385 return AVPROBE_SCORE_MAX;
2387 if (av_stristr(p->buf, "dash:profile")) {
2388 return AVPROBE_SCORE_MAX;
2394 #define OFFSET(x) offsetof(DASHContext, x)
2395 #define FLAGS AV_OPT_FLAG_DECODING_PARAM
2396 static const AVOption dash_options[] = {
2397 {"allowed_extensions", "List of file extensions that dash is allowed to access",
2398 OFFSET(allowed_extensions), AV_OPT_TYPE_STRING,
2399 {.str = "aac,m4a,m4s,m4v,mov,mp4,webm,ts"},
2400 INT_MIN, INT_MAX, FLAGS},
2404 static const AVClass dash_class = {
2405 .class_name = "dash",
2406 .item_name = av_default_item_name,
2407 .option = dash_options,
2408 .version = LIBAVUTIL_VERSION_INT,
2411 AVInputFormat ff_dash_demuxer = {
2413 .long_name = NULL_IF_CONFIG_SMALL("Dynamic Adaptive Streaming over HTTP"),
2414 .priv_class = &dash_class,
2415 .priv_data_size = sizeof(DASHContext),
2416 .read_probe = dash_probe,
2417 .read_header = dash_read_header,
2418 .read_packet = dash_read_packet,
2419 .read_close = dash_close,
2420 .read_seek = dash_read_seek,
2421 .flags = AVFMT_NO_BYTE_SEEK,