2 * Dynamic Adaptive Streaming over HTTP demux
3 * Copyright (c) 2017 samsamsam@o2.pl based on HLS demux
4 * Copyright (c) 2017 Steven Liu
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include <libxml/parser.h>
23 #include "libavutil/intreadwrite.h"
24 #include "libavutil/opt.h"
25 #include "libavutil/time.h"
26 #include "libavutil/parseutils.h"
28 #include "avio_internal.h"
31 #define INITIAL_BUFFER_SIZE 32768
32 #define MAX_BPRINT_READ_SIZE (UINT_MAX - 1)
33 #define DEFAULT_MANIFEST_SIZE 8 * 1024
42 * reference to : ISO_IEC_23009-1-DASH-2012
44 * Table: Table 17 — Semantics of SegmentTimeline element
47 /* starttime: Element or Attribute Name
48 * specifies the MPD start time, in @timescale units,
49 * the first Segment in the series starts relative to the beginning of the Period.
50 * The value of this attribute must be equal to or greater than the sum of the previous S
51 * element earliest presentation time and the sum of the contiguous Segment durations.
52 * If the value of the attribute is greater than what is expressed by the previous S element,
53 * it expresses discontinuities in the timeline.
54 * If not present then the value shall be assumed to be zero for the first S element
55 * and for the subsequent S elements, the value shall be assumed to be the sum of
56 * the previous S element's earliest presentation time and contiguous duration
57 * (i.e. previous S@starttime + @duration * (@repeat + 1)).
60 /* repeat: Element or Attribute Name
61 * specifies the repeat count of the number of following contiguous Segments with
62 * the same duration expressed by the value of @duration. This value is zero-based
63 * (e.g. a value of three means four Segments in the contiguous series).
66 /* duration: Element or Attribute Name
67 * specifies the Segment duration, in units of the value of the @timescale.
73 * Each playlist has its own demuxer. If it is currently active,
74 * it has an opened AVIOContext too, and potentially an AVPacket
75 * containing the next packet from this stream.
77 struct representation {
81 AVFormatContext *parent;
89 AVStream *assoc_stream; /* demuxer stream associated with this representation */
92 struct fragment **fragments; /* VOD list of fragment for profile */
95 struct timeline **timelines;
99 int64_t start_number; /* used in case when we have dynamic list of segment to know which segments are new one*/
101 int64_t fragment_duration;
102 int64_t fragment_timescale;
104 int64_t presentation_timeoffset;
107 int64_t cur_seg_offset;
108 int64_t cur_seg_size;
109 struct fragment *cur_seg;
111 /* Currently active Media Initialization Section */
112 struct fragment *init_section;
113 uint8_t *init_sec_buf;
114 uint32_t init_sec_buf_size;
115 uint32_t init_sec_data_len;
116 uint32_t init_sec_buf_read_offset;
117 int64_t cur_timestamp;
118 int is_restart_needed;
121 typedef struct DASHContext {
122 const AVClass *class;
126 struct representation **videos;
128 struct representation **audios;
130 struct representation **subtitles;
132 /* MediaPresentationDescription Attribute */
133 uint64_t media_presentation_duration;
134 uint64_t suggested_presentation_delay;
135 uint64_t availability_start_time;
136 uint64_t availability_end_time;
137 uint64_t publish_time;
138 uint64_t minimum_update_period;
139 uint64_t time_shift_buffer_depth;
140 uint64_t min_buffer_time;
142 /* Period Attribute */
143 uint64_t period_duration;
144 uint64_t period_start;
146 /* AdaptationSet Attribute */
147 char *adaptionset_lang;
150 AVIOInterruptCB *interrupt_callback;
151 char *allowed_extensions;
152 AVDictionary *avio_opts;
155 /* Flags for init section*/
156 int is_init_section_common_video;
157 int is_init_section_common_audio;
161 static int ishttp(char *url)
163 const char *proto_name = avio_find_protocol_name(url);
164 return av_strstart(proto_name, "http", NULL);
167 static int aligned(int val)
169 return ((val + 0x3F) >> 6) << 6;
172 static uint64_t get_current_time_in_sec(void)
174 return av_gettime() / 1000000;
177 static uint64_t get_utc_date_time_insec(AVFormatContext *s, const char *datetime)
188 /* ISO-8601 date parser */
192 ret = sscanf(datetime, "%d-%d-%dT%d:%d:%fZ", &year, &month, &day, &hour, &minute, &second);
193 /* year, month, day, hour, minute, second 6 arguments */
195 av_log(s, AV_LOG_WARNING, "get_utc_date_time_insec get a wrong time format\n");
197 timeinfo.tm_year = year - 1900;
198 timeinfo.tm_mon = month - 1;
199 timeinfo.tm_mday = day;
200 timeinfo.tm_hour = hour;
201 timeinfo.tm_min = minute;
202 timeinfo.tm_sec = (int)second;
204 return av_timegm(&timeinfo);
207 static uint32_t get_duration_insec(AVFormatContext *s, const char *duration)
209 /* ISO-8601 duration parser */
217 const char *ptr = duration;
220 if (*ptr == 'P' || *ptr == 'T') {
225 if (sscanf(ptr, "%f%c%n", &value, &type, &size) != 2) {
226 av_log(s, AV_LOG_WARNING, "get_duration_insec get a wrong time format\n");
227 return 0; /* parser error */
231 days = (uint32_t)value;
234 hours = (uint32_t)value;
237 mins = (uint32_t)value;
240 secs = (uint32_t)value;
243 // handle invalid type
248 return ((days * 24 + hours) * 60 + mins) * 60 + secs;
251 static int64_t get_segment_start_time_based_on_timeline(struct representation *pls, int64_t cur_seq_no)
253 int64_t start_time = 0;
258 if (pls->n_timelines) {
259 for (i = 0; i < pls->n_timelines; i++) {
260 if (pls->timelines[i]->starttime > 0) {
261 start_time = pls->timelines[i]->starttime;
263 if (num == cur_seq_no)
266 start_time += pls->timelines[i]->duration;
268 if (pls->timelines[i]->repeat == -1) {
269 start_time = pls->timelines[i]->duration * cur_seq_no;
273 for (j = 0; j < pls->timelines[i]->repeat; j++) {
275 if (num == cur_seq_no)
277 start_time += pls->timelines[i]->duration;
286 static int64_t calc_next_seg_no_from_timelines(struct representation *pls, int64_t cur_time)
291 int64_t start_time = 0;
293 for (i = 0; i < pls->n_timelines; i++) {
294 if (pls->timelines[i]->starttime > 0) {
295 start_time = pls->timelines[i]->starttime;
297 if (start_time > cur_time)
300 start_time += pls->timelines[i]->duration;
301 for (j = 0; j < pls->timelines[i]->repeat; j++) {
303 if (start_time > cur_time)
305 start_time += pls->timelines[i]->duration;
316 static void free_fragment(struct fragment **seg)
321 av_freep(&(*seg)->url);
325 static void free_fragment_list(struct representation *pls)
329 for (i = 0; i < pls->n_fragments; i++) {
330 free_fragment(&pls->fragments[i]);
332 av_freep(&pls->fragments);
333 pls->n_fragments = 0;
336 static void free_timelines_list(struct representation *pls)
340 for (i = 0; i < pls->n_timelines; i++) {
341 av_freep(&pls->timelines[i]);
343 av_freep(&pls->timelines);
344 pls->n_timelines = 0;
347 static void free_representation(struct representation *pls)
349 free_fragment_list(pls);
350 free_timelines_list(pls);
351 free_fragment(&pls->cur_seg);
352 free_fragment(&pls->init_section);
353 av_freep(&pls->init_sec_buf);
354 av_freep(&pls->pb.buffer);
355 ff_format_io_close(pls->parent, &pls->input);
358 avformat_close_input(&pls->ctx);
361 av_freep(&pls->url_template);
362 av_freep(&pls->lang);
366 static void free_video_list(DASHContext *c)
369 for (i = 0; i < c->n_videos; i++) {
370 struct representation *pls = c->videos[i];
371 free_representation(pls);
373 av_freep(&c->videos);
377 static void free_audio_list(DASHContext *c)
380 for (i = 0; i < c->n_audios; i++) {
381 struct representation *pls = c->audios[i];
382 free_representation(pls);
384 av_freep(&c->audios);
388 static void free_subtitle_list(DASHContext *c)
391 for (i = 0; i < c->n_subtitles; i++) {
392 struct representation *pls = c->subtitles[i];
393 free_representation(pls);
395 av_freep(&c->subtitles);
399 static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url,
400 AVDictionary **opts, AVDictionary *opts2, int *is_http)
402 DASHContext *c = s->priv_data;
403 AVDictionary *tmp = NULL;
404 const char *proto_name = NULL;
407 if (av_strstart(url, "crypto", NULL)) {
408 if (url[6] == '+' || url[6] == ':')
409 proto_name = avio_find_protocol_name(url + 7);
413 proto_name = avio_find_protocol_name(url);
416 return AVERROR_INVALIDDATA;
418 // only http(s) & file are allowed
419 if (av_strstart(proto_name, "file", NULL)) {
420 if (strcmp(c->allowed_extensions, "ALL") && !av_match_ext(url, c->allowed_extensions)) {
421 av_log(s, AV_LOG_ERROR,
422 "Filename extension of \'%s\' is not a common multimedia extension, blocked for security reasons.\n"
423 "If you wish to override this adjust allowed_extensions, you can set it to \'ALL\' to allow all\n",
425 return AVERROR_INVALIDDATA;
427 } else if (av_strstart(proto_name, "http", NULL)) {
430 return AVERROR_INVALIDDATA;
432 if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':')
434 else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':')
436 else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))
437 return AVERROR_INVALIDDATA;
440 av_dict_copy(&tmp, *opts, 0);
441 av_dict_copy(&tmp, opts2, 0);
442 ret = avio_open2(pb, url, AVIO_FLAG_READ, c->interrupt_callback, &tmp);
444 // update cookies on http response with setcookies.
445 char *new_cookies = NULL;
447 if (!(s->flags & AVFMT_FLAG_CUSTOM_IO))
448 av_opt_get(*pb, "cookies", AV_OPT_SEARCH_CHILDREN, (uint8_t**)&new_cookies);
451 av_dict_set(opts, "cookies", new_cookies, AV_DICT_DONT_STRDUP_VAL);
459 *is_http = av_strstart(proto_name, "http", NULL);
464 static char *get_content_url(xmlNodePtr *baseurl_nodes,
468 char *rep_bandwidth_val,
474 char *tmp_str = av_mallocz(max_url_size);
479 for (i = 0; i < n_baseurl_nodes; ++i) {
480 if (baseurl_nodes[i] &&
481 baseurl_nodes[i]->children &&
482 baseurl_nodes[i]->children->type == XML_TEXT_NODE) {
483 text = xmlNodeGetContent(baseurl_nodes[i]->children);
485 memset(tmp_str, 0, max_url_size);
486 ff_make_absolute_url(tmp_str, max_url_size, "", text);
493 ff_make_absolute_url(tmp_str, max_url_size, tmp_str, val);
496 url = av_strireplace(tmp_str, "$RepresentationID$", rep_id_val);
500 av_strlcpy(tmp_str, url, max_url_size);
502 if (rep_bandwidth_val && tmp_str[0] != '\0') {
503 // free any previously assigned url before reassigning
505 url = av_strireplace(tmp_str, "$Bandwidth$", rep_bandwidth_val);
515 static char *get_val_from_nodes_tab(xmlNodePtr *nodes, const int n_nodes, const char *attrname)
520 for (i = 0; i < n_nodes; ++i) {
522 val = xmlGetProp(nodes[i], attrname);
531 static xmlNodePtr find_child_node_by_name(xmlNodePtr rootnode, const char *nodename)
533 xmlNodePtr node = rootnode;
538 node = xmlFirstElementChild(node);
540 if (!av_strcasecmp(node->name, nodename)) {
543 node = xmlNextElementSibling(node);
548 static enum AVMediaType get_content_type(xmlNodePtr node)
550 enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
556 for (i = 0; i < 2; i++) {
557 attr = i ? "mimeType" : "contentType";
558 val = xmlGetProp(node, attr);
560 if (av_stristr(val, "video")) {
561 type = AVMEDIA_TYPE_VIDEO;
562 } else if (av_stristr(val, "audio")) {
563 type = AVMEDIA_TYPE_AUDIO;
564 } else if (av_stristr(val, "text")) {
565 type = AVMEDIA_TYPE_SUBTITLE;
574 static struct fragment * get_Fragment(char *range)
576 struct fragment * seg = av_mallocz(sizeof(struct fragment));
583 char *str_end_offset;
584 char *str_offset = av_strtok(range, "-", &str_end_offset);
585 seg->url_offset = strtoll(str_offset, NULL, 10);
586 seg->size = strtoll(str_end_offset, NULL, 10) - seg->url_offset + 1;
592 static int parse_manifest_segmenturlnode(AVFormatContext *s, struct representation *rep,
593 xmlNodePtr fragmenturl_node,
594 xmlNodePtr *baseurl_nodes,
596 char *rep_bandwidth_val)
598 DASHContext *c = s->priv_data;
599 char *initialization_val = NULL;
600 char *media_val = NULL;
601 char *range_val = NULL;
602 int max_url_size = c ? c->max_url_size: MAX_URL_SIZE;
605 if (!av_strcasecmp(fragmenturl_node->name, "Initialization")) {
606 initialization_val = xmlGetProp(fragmenturl_node, "sourceURL");
607 range_val = xmlGetProp(fragmenturl_node, "range");
608 if (initialization_val || range_val) {
609 free_fragment(&rep->init_section);
610 rep->init_section = get_Fragment(range_val);
612 if (!rep->init_section) {
613 xmlFree(initialization_val);
614 return AVERROR(ENOMEM);
616 rep->init_section->url = get_content_url(baseurl_nodes, 4,
621 xmlFree(initialization_val);
622 if (!rep->init_section->url) {
623 av_freep(&rep->init_section);
624 return AVERROR(ENOMEM);
627 } else if (!av_strcasecmp(fragmenturl_node->name, "SegmentURL")) {
628 media_val = xmlGetProp(fragmenturl_node, "media");
629 range_val = xmlGetProp(fragmenturl_node, "mediaRange");
630 if (media_val || range_val) {
631 struct fragment *seg = get_Fragment(range_val);
635 return AVERROR(ENOMEM);
637 seg->url = get_content_url(baseurl_nodes, 4,
645 return AVERROR(ENOMEM);
647 err = av_dynarray_add_nofree(&rep->fragments, &rep->n_fragments, seg);
658 static int parse_manifest_segmenttimeline(AVFormatContext *s, struct representation *rep,
659 xmlNodePtr fragment_timeline_node)
661 xmlAttrPtr attr = NULL;
665 if (!av_strcasecmp(fragment_timeline_node->name, "S")) {
666 struct timeline *tml = av_mallocz(sizeof(struct timeline));
668 return AVERROR(ENOMEM);
670 attr = fragment_timeline_node->properties;
672 val = xmlGetProp(fragment_timeline_node, attr->name);
675 av_log(s, AV_LOG_WARNING, "parse_manifest_segmenttimeline attr->name = %s val is NULL\n", attr->name);
679 if (!av_strcasecmp(attr->name, "t")) {
680 tml->starttime = (int64_t)strtoll(val, NULL, 10);
681 } else if (!av_strcasecmp(attr->name, "r")) {
682 tml->repeat =(int64_t) strtoll(val, NULL, 10);
683 } else if (!av_strcasecmp(attr->name, "d")) {
684 tml->duration = (int64_t)strtoll(val, NULL, 10);
689 err = av_dynarray_add_nofree(&rep->timelines, &rep->n_timelines, tml);
699 static int resolve_content_path(AVFormatContext *s, const char *url, int *max_url_size, xmlNodePtr *baseurl_nodes, int n_baseurl_nodes)
701 char *tmp_str = NULL;
703 char *mpdName = NULL;
704 xmlNodePtr node = NULL;
705 char *baseurl = NULL;
706 char *root_url = NULL;
716 int tmp_max_url_size = strlen(url);
718 for (i = n_baseurl_nodes-1; i >= 0 ; i--) {
719 text = xmlNodeGetContent(baseurl_nodes[i]);
722 tmp_max_url_size += strlen(text);
730 tmp_max_url_size = aligned(tmp_max_url_size);
731 text = av_mallocz(tmp_max_url_size);
733 updated = AVERROR(ENOMEM);
736 av_strlcpy(text, url, strlen(url)+1);
738 while (mpdName = av_strtok(tmp, "/", &tmp)) {
739 size = strlen(mpdName);
743 path = av_mallocz(tmp_max_url_size);
744 tmp_str = av_mallocz(tmp_max_url_size);
745 if (!tmp_str || !path) {
746 updated = AVERROR(ENOMEM);
750 av_strlcpy (path, url, strlen(url) - size + 1);
751 for (rootId = n_baseurl_nodes - 1; rootId > 0; rootId --) {
752 if (!(node = baseurl_nodes[rootId])) {
755 text = xmlNodeGetContent(node);
763 node = baseurl_nodes[rootId];
764 baseurl = xmlNodeGetContent(node);
765 root_url = (av_strcasecmp(baseurl, "")) ? baseurl : path;
767 xmlNodeSetContent(node, root_url);
771 size = strlen(root_url);
772 isRootHttp = ishttp(root_url);
774 if (size > 0 && root_url[size - 1] != token) {
775 av_strlcat(root_url, "/", size + 2);
779 for (i = 0; i < n_baseurl_nodes; ++i) {
783 text = xmlNodeGetContent(baseurl_nodes[i]);
784 if (text && !av_strstart(text, "/", NULL)) {
785 memset(tmp_str, 0, strlen(tmp_str));
786 if (!ishttp(text) && isRootHttp) {
787 av_strlcpy(tmp_str, root_url, size + 1);
789 start = (text[0] == token);
790 if (start && av_stristr(tmp_str, text)) {
792 if (!av_strncasecmp(tmp_str, "http://", 7)) {
794 } else if (!av_strncasecmp(tmp_str, "https://", 8)) {
798 memset(p + 1, 0, strlen(p));
800 av_strlcat(tmp_str, text + start, tmp_max_url_size);
801 xmlNodeSetContent(baseurl_nodes[i], tmp_str);
808 if (tmp_max_url_size > *max_url_size) {
809 *max_url_size = tmp_max_url_size;
818 static int parse_manifest_representation(AVFormatContext *s, const char *url,
820 xmlNodePtr adaptionset_node,
821 xmlNodePtr mpd_baseurl_node,
822 xmlNodePtr period_baseurl_node,
823 xmlNodePtr period_segmenttemplate_node,
824 xmlNodePtr period_segmentlist_node,
825 xmlNodePtr fragment_template_node,
826 xmlNodePtr content_component_node,
827 xmlNodePtr adaptionset_baseurl_node,
828 xmlNodePtr adaptionset_segmentlist_node,
829 xmlNodePtr adaptionset_supplementalproperty_node)
832 DASHContext *c = s->priv_data;
833 struct representation *rep = NULL;
834 struct fragment *seg = NULL;
835 xmlNodePtr representation_segmenttemplate_node = NULL;
836 xmlNodePtr representation_baseurl_node = NULL;
837 xmlNodePtr representation_segmentlist_node = NULL;
838 xmlNodePtr segmentlists_tab[3];
839 xmlNodePtr fragment_timeline_node = NULL;
840 xmlNodePtr fragment_templates_tab[5];
842 xmlNodePtr baseurl_nodes[4];
843 xmlNodePtr representation_node = node;
844 char *rep_id_val, *rep_bandwidth_val;
845 enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
847 // try get information from representation
848 if (type == AVMEDIA_TYPE_UNKNOWN)
849 type = get_content_type(representation_node);
850 // try get information from contentComponen
851 if (type == AVMEDIA_TYPE_UNKNOWN)
852 type = get_content_type(content_component_node);
853 // try get information from adaption set
854 if (type == AVMEDIA_TYPE_UNKNOWN)
855 type = get_content_type(adaptionset_node);
856 if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO &&
857 type != AVMEDIA_TYPE_SUBTITLE) {
858 av_log(s, AV_LOG_VERBOSE, "Parsing '%s' - skipp not supported representation type\n", url);
862 // convert selected representation to our internal struct
863 rep = av_mallocz(sizeof(struct representation));
865 return AVERROR(ENOMEM);
866 if (c->adaptionset_lang) {
867 rep->lang = av_strdup(c->adaptionset_lang);
869 av_log(s, AV_LOG_ERROR, "alloc language memory failure\n");
871 return AVERROR(ENOMEM);
875 representation_segmenttemplate_node = find_child_node_by_name(representation_node, "SegmentTemplate");
876 representation_baseurl_node = find_child_node_by_name(representation_node, "BaseURL");
877 representation_segmentlist_node = find_child_node_by_name(representation_node, "SegmentList");
878 rep_id_val = xmlGetProp(representation_node, "id");
879 rep_bandwidth_val = xmlGetProp(representation_node, "bandwidth");
881 baseurl_nodes[0] = mpd_baseurl_node;
882 baseurl_nodes[1] = period_baseurl_node;
883 baseurl_nodes[2] = adaptionset_baseurl_node;
884 baseurl_nodes[3] = representation_baseurl_node;
886 ret = resolve_content_path(s, url, &c->max_url_size, baseurl_nodes, 4);
887 c->max_url_size = aligned(c->max_url_size
888 + (rep_id_val ? strlen(rep_id_val) : 0)
889 + (rep_bandwidth_val ? strlen(rep_bandwidth_val) : 0));
890 if (ret == AVERROR(ENOMEM) || ret == 0)
892 if (representation_segmenttemplate_node || fragment_template_node || period_segmenttemplate_node) {
893 fragment_timeline_node = NULL;
894 fragment_templates_tab[0] = representation_segmenttemplate_node;
895 fragment_templates_tab[1] = adaptionset_segmentlist_node;
896 fragment_templates_tab[2] = fragment_template_node;
897 fragment_templates_tab[3] = period_segmenttemplate_node;
898 fragment_templates_tab[4] = period_segmentlist_node;
900 val = get_val_from_nodes_tab(fragment_templates_tab, 4, "initialization");
902 rep->init_section = av_mallocz(sizeof(struct fragment));
903 if (!rep->init_section) {
907 c->max_url_size = aligned(c->max_url_size + strlen(val));
908 rep->init_section->url = get_content_url(baseurl_nodes, 4, c->max_url_size, rep_id_val, rep_bandwidth_val, val);
910 if (!rep->init_section->url)
912 rep->init_section->size = -1;
914 val = get_val_from_nodes_tab(fragment_templates_tab, 4, "media");
916 c->max_url_size = aligned(c->max_url_size + strlen(val));
917 rep->url_template = get_content_url(baseurl_nodes, 4, c->max_url_size, rep_id_val, rep_bandwidth_val, val);
920 val = get_val_from_nodes_tab(fragment_templates_tab, 4, "presentationTimeOffset");
922 rep->presentation_timeoffset = (int64_t) strtoll(val, NULL, 10);
923 av_log(s, AV_LOG_TRACE, "rep->presentation_timeoffset = [%"PRId64"]\n", rep->presentation_timeoffset);
926 val = get_val_from_nodes_tab(fragment_templates_tab, 4, "duration");
928 rep->fragment_duration = (int64_t) strtoll(val, NULL, 10);
929 av_log(s, AV_LOG_TRACE, "rep->fragment_duration = [%"PRId64"]\n", rep->fragment_duration);
932 val = get_val_from_nodes_tab(fragment_templates_tab, 4, "timescale");
934 rep->fragment_timescale = (int64_t) strtoll(val, NULL, 10);
935 av_log(s, AV_LOG_TRACE, "rep->fragment_timescale = [%"PRId64"]\n", rep->fragment_timescale);
938 val = get_val_from_nodes_tab(fragment_templates_tab, 4, "startNumber");
940 rep->start_number = rep->first_seq_no = (int64_t) strtoll(val, NULL, 10);
941 av_log(s, AV_LOG_TRACE, "rep->first_seq_no = [%"PRId64"]\n", rep->first_seq_no);
944 if (adaptionset_supplementalproperty_node) {
945 if (!av_strcasecmp(xmlGetProp(adaptionset_supplementalproperty_node,"schemeIdUri"), "http://dashif.org/guidelines/last-segment-number")) {
946 val = xmlGetProp(adaptionset_supplementalproperty_node,"value");
948 av_log(s, AV_LOG_ERROR, "Missing value attribute in adaptionset_supplementalproperty_node\n");
950 rep->last_seq_no =(int64_t) strtoll(val, NULL, 10) - 1;
956 fragment_timeline_node = find_child_node_by_name(representation_segmenttemplate_node, "SegmentTimeline");
958 if (!fragment_timeline_node)
959 fragment_timeline_node = find_child_node_by_name(fragment_template_node, "SegmentTimeline");
960 if (!fragment_timeline_node)
961 fragment_timeline_node = find_child_node_by_name(adaptionset_segmentlist_node, "SegmentTimeline");
962 if (!fragment_timeline_node)
963 fragment_timeline_node = find_child_node_by_name(period_segmentlist_node, "SegmentTimeline");
964 if (fragment_timeline_node) {
965 fragment_timeline_node = xmlFirstElementChild(fragment_timeline_node);
966 while (fragment_timeline_node) {
967 ret = parse_manifest_segmenttimeline(s, rep, fragment_timeline_node);
970 fragment_timeline_node = xmlNextElementSibling(fragment_timeline_node);
973 } else if (representation_baseurl_node && !representation_segmentlist_node) {
974 seg = av_mallocz(sizeof(struct fragment));
977 ret = av_dynarray_add_nofree(&rep->fragments, &rep->n_fragments, seg);
982 seg->url = get_content_url(baseurl_nodes, 4, c->max_url_size, rep_id_val, rep_bandwidth_val, NULL);
986 } else if (representation_segmentlist_node) {
987 // TODO: https://www.brendanlong.com/the-structure-of-an-mpeg-dash-mpd.html
988 // http://www-itec.uni-klu.ac.at/dash/ddash/mpdGenerator.php?fragmentlength=15&type=full
989 xmlNodePtr fragmenturl_node = NULL;
990 segmentlists_tab[0] = representation_segmentlist_node;
991 segmentlists_tab[1] = adaptionset_segmentlist_node;
992 segmentlists_tab[2] = period_segmentlist_node;
994 val = get_val_from_nodes_tab(segmentlists_tab, 3, "duration");
996 rep->fragment_duration = (int64_t) strtoll(val, NULL, 10);
997 av_log(s, AV_LOG_TRACE, "rep->fragment_duration = [%"PRId64"]\n", rep->fragment_duration);
1000 val = get_val_from_nodes_tab(segmentlists_tab, 3, "timescale");
1002 rep->fragment_timescale = (int64_t) strtoll(val, NULL, 10);
1003 av_log(s, AV_LOG_TRACE, "rep->fragment_timescale = [%"PRId64"]\n", rep->fragment_timescale);
1006 val = get_val_from_nodes_tab(segmentlists_tab, 3, "startNumber");
1008 rep->start_number = rep->first_seq_no = (int64_t) strtoll(val, NULL, 10);
1009 av_log(s, AV_LOG_TRACE, "rep->first_seq_no = [%"PRId64"]\n", rep->first_seq_no);
1013 fragmenturl_node = xmlFirstElementChild(representation_segmentlist_node);
1014 while (fragmenturl_node) {
1015 ret = parse_manifest_segmenturlnode(s, rep, fragmenturl_node,
1021 fragmenturl_node = xmlNextElementSibling(fragmenturl_node);
1024 fragment_timeline_node = find_child_node_by_name(adaptionset_segmentlist_node, "SegmentTimeline");
1025 if (!fragment_timeline_node)
1026 fragment_timeline_node = find_child_node_by_name(period_segmentlist_node, "SegmentTimeline");
1027 if (fragment_timeline_node) {
1028 fragment_timeline_node = xmlFirstElementChild(fragment_timeline_node);
1029 while (fragment_timeline_node) {
1030 ret = parse_manifest_segmenttimeline(s, rep, fragment_timeline_node);
1033 fragment_timeline_node = xmlNextElementSibling(fragment_timeline_node);
1037 av_log(s, AV_LOG_ERROR, "Unknown format of Representation node id[%s] \n", rep_id_val);
1041 if (rep->fragment_duration > 0 && !rep->fragment_timescale)
1042 rep->fragment_timescale = 1;
1043 rep->bandwidth = rep_bandwidth_val ? atoi(rep_bandwidth_val) : 0;
1044 strncpy(rep->id, rep_id_val ? rep_id_val : "", sizeof(rep->id));
1045 rep->framerate = av_make_q(0, 0);
1046 if (type == AVMEDIA_TYPE_VIDEO) {
1047 char *rep_framerate_val = xmlGetProp(representation_node, "frameRate");
1048 if (rep_framerate_val) {
1049 ret = av_parse_video_rate(&rep->framerate, rep_framerate_val);
1051 av_log(s, AV_LOG_VERBOSE, "Ignoring invalid frame rate '%s'\n", rep_framerate_val);
1052 xmlFree(rep_framerate_val);
1057 case AVMEDIA_TYPE_VIDEO:
1058 ret = av_dynarray_add_nofree(&c->videos, &c->n_videos, rep);
1060 case AVMEDIA_TYPE_AUDIO:
1061 ret = av_dynarray_add_nofree(&c->audios, &c->n_audios, rep);
1063 case AVMEDIA_TYPE_SUBTITLE:
1064 ret = av_dynarray_add_nofree(&c->subtitles, &c->n_subtitles, rep);
1072 xmlFree(rep_id_val);
1073 if (rep_bandwidth_val)
1074 xmlFree(rep_bandwidth_val);
1078 ret = AVERROR(ENOMEM);
1080 free_representation(rep);
1084 static int parse_manifest_adaptationset_attr(AVFormatContext *s, xmlNodePtr adaptionset_node)
1086 DASHContext *c = s->priv_data;
1088 if (!adaptionset_node) {
1089 av_log(s, AV_LOG_WARNING, "Cannot get AdaptionSet\n");
1090 return AVERROR(EINVAL);
1092 c->adaptionset_lang = xmlGetProp(adaptionset_node, "lang");
1097 static int parse_manifest_adaptationset(AVFormatContext *s, const char *url,
1098 xmlNodePtr adaptionset_node,
1099 xmlNodePtr mpd_baseurl_node,
1100 xmlNodePtr period_baseurl_node,
1101 xmlNodePtr period_segmenttemplate_node,
1102 xmlNodePtr period_segmentlist_node)
1105 DASHContext *c = s->priv_data;
1106 xmlNodePtr fragment_template_node = NULL;
1107 xmlNodePtr content_component_node = NULL;
1108 xmlNodePtr adaptionset_baseurl_node = NULL;
1109 xmlNodePtr adaptionset_segmentlist_node = NULL;
1110 xmlNodePtr adaptionset_supplementalproperty_node = NULL;
1111 xmlNodePtr node = NULL;
1113 ret = parse_manifest_adaptationset_attr(s, adaptionset_node);
1117 node = xmlFirstElementChild(adaptionset_node);
1119 if (!av_strcasecmp(node->name, "SegmentTemplate")) {
1120 fragment_template_node = node;
1121 } else if (!av_strcasecmp(node->name, "ContentComponent")) {
1122 content_component_node = node;
1123 } else if (!av_strcasecmp(node->name, "BaseURL")) {
1124 adaptionset_baseurl_node = node;
1125 } else if (!av_strcasecmp(node->name, "SegmentList")) {
1126 adaptionset_segmentlist_node = node;
1127 } else if (!av_strcasecmp(node->name, "SupplementalProperty")) {
1128 adaptionset_supplementalproperty_node = node;
1129 } else if (!av_strcasecmp(node->name, "Representation")) {
1130 ret = parse_manifest_representation(s, url, node,
1133 period_baseurl_node,
1134 period_segmenttemplate_node,
1135 period_segmentlist_node,
1136 fragment_template_node,
1137 content_component_node,
1138 adaptionset_baseurl_node,
1139 adaptionset_segmentlist_node,
1140 adaptionset_supplementalproperty_node);
1144 node = xmlNextElementSibling(node);
1148 xmlFree(c->adaptionset_lang);
1149 c->adaptionset_lang = NULL;
1153 static int parse_programinformation(AVFormatContext *s, xmlNodePtr node)
1155 xmlChar *val = NULL;
1157 node = xmlFirstElementChild(node);
1159 if (!av_strcasecmp(node->name, "Title")) {
1160 val = xmlNodeGetContent(node);
1162 av_dict_set(&s->metadata, "Title", val, 0);
1164 } else if (!av_strcasecmp(node->name, "Source")) {
1165 val = xmlNodeGetContent(node);
1167 av_dict_set(&s->metadata, "Source", val, 0);
1169 } else if (!av_strcasecmp(node->name, "Copyright")) {
1170 val = xmlNodeGetContent(node);
1172 av_dict_set(&s->metadata, "Copyright", val, 0);
1175 node = xmlNextElementSibling(node);
1182 static int parse_manifest(AVFormatContext *s, const char *url, AVIOContext *in)
1184 DASHContext *c = s->priv_data;
1187 int64_t filesize = 0;
1189 AVDictionary *opts = NULL;
1191 xmlNodePtr root_element = NULL;
1192 xmlNodePtr node = NULL;
1193 xmlNodePtr period_node = NULL;
1194 xmlNodePtr tmp_node = NULL;
1195 xmlNodePtr mpd_baseurl_node = NULL;
1196 xmlNodePtr period_baseurl_node = NULL;
1197 xmlNodePtr period_segmenttemplate_node = NULL;
1198 xmlNodePtr period_segmentlist_node = NULL;
1199 xmlNodePtr adaptionset_node = NULL;
1200 xmlAttrPtr attr = NULL;
1202 uint32_t period_duration_sec = 0;
1203 uint32_t period_start_sec = 0;
1208 av_dict_copy(&opts, c->avio_opts, 0);
1209 ret = avio_open2(&in, url, AVIO_FLAG_READ, c->interrupt_callback, &opts);
1210 av_dict_free(&opts);
1215 if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, (uint8_t**)&c->base_url) < 0)
1216 c->base_url = av_strdup(url);
1218 filesize = avio_size(in);
1219 filesize = filesize > 0 ? filesize : DEFAULT_MANIFEST_SIZE;
1221 if (filesize > MAX_BPRINT_READ_SIZE) {
1222 av_log(s, AV_LOG_ERROR, "Manifest too large: %"PRId64"\n", filesize);
1223 return AVERROR_INVALIDDATA;
1226 av_bprint_init(&buf, filesize + 1, AV_BPRINT_SIZE_UNLIMITED);
1228 if ((ret = avio_read_to_bprint(in, &buf, MAX_BPRINT_READ_SIZE)) < 0 ||
1230 (filesize = buf.len) == 0) {
1231 av_log(s, AV_LOG_ERROR, "Unable to read to manifest '%s'\n", url);
1233 ret = AVERROR_INVALIDDATA;
1237 doc = xmlReadMemory(buf.str, filesize, c->base_url, NULL, 0);
1238 root_element = xmlDocGetRootElement(doc);
1239 node = root_element;
1242 ret = AVERROR_INVALIDDATA;
1243 av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing root node\n", url);
1247 if (node->type != XML_ELEMENT_NODE ||
1248 av_strcasecmp(node->name, "MPD")) {
1249 ret = AVERROR_INVALIDDATA;
1250 av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - wrong root node name[%s] type[%d]\n", url, node->name, (int)node->type);
1254 val = xmlGetProp(node, "type");
1256 av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing type attrib\n", url);
1257 ret = AVERROR_INVALIDDATA;
1260 if (!av_strcasecmp(val, "dynamic"))
1264 attr = node->properties;
1266 val = xmlGetProp(node, attr->name);
1268 if (!av_strcasecmp(attr->name, "availabilityStartTime")) {
1269 c->availability_start_time = get_utc_date_time_insec(s, val);
1270 av_log(s, AV_LOG_TRACE, "c->availability_start_time = [%"PRId64"]\n", c->availability_start_time);
1271 } else if (!av_strcasecmp(attr->name, "availabilityEndTime")) {
1272 c->availability_end_time = get_utc_date_time_insec(s, val);
1273 av_log(s, AV_LOG_TRACE, "c->availability_end_time = [%"PRId64"]\n", c->availability_end_time);
1274 } else if (!av_strcasecmp(attr->name, "publishTime")) {
1275 c->publish_time = get_utc_date_time_insec(s, val);
1276 av_log(s, AV_LOG_TRACE, "c->publish_time = [%"PRId64"]\n", c->publish_time);
1277 } else if (!av_strcasecmp(attr->name, "minimumUpdatePeriod")) {
1278 c->minimum_update_period = get_duration_insec(s, val);
1279 av_log(s, AV_LOG_TRACE, "c->minimum_update_period = [%"PRId64"]\n", c->minimum_update_period);
1280 } else if (!av_strcasecmp(attr->name, "timeShiftBufferDepth")) {
1281 c->time_shift_buffer_depth = get_duration_insec(s, val);
1282 av_log(s, AV_LOG_TRACE, "c->time_shift_buffer_depth = [%"PRId64"]\n", c->time_shift_buffer_depth);
1283 } else if (!av_strcasecmp(attr->name, "minBufferTime")) {
1284 c->min_buffer_time = get_duration_insec(s, val);
1285 av_log(s, AV_LOG_TRACE, "c->min_buffer_time = [%"PRId64"]\n", c->min_buffer_time);
1286 } else if (!av_strcasecmp(attr->name, "suggestedPresentationDelay")) {
1287 c->suggested_presentation_delay = get_duration_insec(s, val);
1288 av_log(s, AV_LOG_TRACE, "c->suggested_presentation_delay = [%"PRId64"]\n", c->suggested_presentation_delay);
1289 } else if (!av_strcasecmp(attr->name, "mediaPresentationDuration")) {
1290 c->media_presentation_duration = get_duration_insec(s, val);
1291 av_log(s, AV_LOG_TRACE, "c->media_presentation_duration = [%"PRId64"]\n", c->media_presentation_duration);
1297 tmp_node = find_child_node_by_name(node, "BaseURL");
1299 mpd_baseurl_node = xmlCopyNode(tmp_node,1);
1301 mpd_baseurl_node = xmlNewNode(NULL, "BaseURL");
1304 // at now we can handle only one period, with the longest duration
1305 node = xmlFirstElementChild(node);
1307 if (!av_strcasecmp(node->name, "Period")) {
1308 period_duration_sec = 0;
1309 period_start_sec = 0;
1310 attr = node->properties;
1312 val = xmlGetProp(node, attr->name);
1313 if (!av_strcasecmp(attr->name, "duration")) {
1314 period_duration_sec = get_duration_insec(s, val);
1315 } else if (!av_strcasecmp(attr->name, "start")) {
1316 period_start_sec = get_duration_insec(s, val);
1321 if ((period_duration_sec) >= (c->period_duration)) {
1323 c->period_duration = period_duration_sec;
1324 c->period_start = period_start_sec;
1325 if (c->period_start > 0)
1326 c->media_presentation_duration = c->period_duration;
1328 } else if (!av_strcasecmp(node->name, "ProgramInformation")) {
1329 parse_programinformation(s, node);
1331 node = xmlNextElementSibling(node);
1334 av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing Period node\n", url);
1335 ret = AVERROR_INVALIDDATA;
1339 adaptionset_node = xmlFirstElementChild(period_node);
1340 while (adaptionset_node) {
1341 if (!av_strcasecmp(adaptionset_node->name, "BaseURL")) {
1342 period_baseurl_node = adaptionset_node;
1343 } else if (!av_strcasecmp(adaptionset_node->name, "SegmentTemplate")) {
1344 period_segmenttemplate_node = adaptionset_node;
1345 } else if (!av_strcasecmp(adaptionset_node->name, "SegmentList")) {
1346 period_segmentlist_node = adaptionset_node;
1347 } else if (!av_strcasecmp(adaptionset_node->name, "AdaptationSet")) {
1348 parse_manifest_adaptationset(s, url, adaptionset_node, mpd_baseurl_node, period_baseurl_node, period_segmenttemplate_node, period_segmentlist_node);
1350 adaptionset_node = xmlNextElementSibling(adaptionset_node);
1353 /*free the document */
1356 xmlFreeNode(mpd_baseurl_node);
1359 av_bprint_finalize(&buf, NULL);
1366 static int64_t calc_cur_seg_no(AVFormatContext *s, struct representation *pls)
1368 DASHContext *c = s->priv_data;
1370 int64_t start_time_offset = 0;
1373 if (pls->n_fragments) {
1374 av_log(s, AV_LOG_TRACE, "in n_fragments mode\n");
1375 num = pls->first_seq_no;
1376 } else if (pls->n_timelines) {
1377 av_log(s, AV_LOG_TRACE, "in n_timelines mode\n");
1378 start_time_offset = get_segment_start_time_based_on_timeline(pls, 0xFFFFFFFF) - 60 * pls->fragment_timescale; // 60 seconds before end
1379 num = calc_next_seg_no_from_timelines(pls, start_time_offset);
1381 num = pls->first_seq_no;
1383 num += pls->first_seq_no;
1384 } else if (pls->fragment_duration){
1385 av_log(s, AV_LOG_TRACE, "in fragment_duration mode fragment_timescale = %"PRId64", presentation_timeoffset = %"PRId64"\n", pls->fragment_timescale, pls->presentation_timeoffset);
1386 if (pls->presentation_timeoffset) {
1387 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;
1388 } else if (c->publish_time > 0 && !c->availability_start_time) {
1389 if (c->min_buffer_time) {
1390 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;
1392 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;
1395 num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time) - c->suggested_presentation_delay) * pls->fragment_timescale) / pls->fragment_duration;
1399 num = pls->first_seq_no;
1404 static int64_t calc_min_seg_no(AVFormatContext *s, struct representation *pls)
1406 DASHContext *c = s->priv_data;
1409 if (c->is_live && pls->fragment_duration) {
1410 av_log(s, AV_LOG_TRACE, "in live mode\n");
1411 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;
1413 num = pls->first_seq_no;
1418 static int64_t calc_max_seg_no(struct representation *pls, DASHContext *c)
1422 if (pls->n_fragments) {
1423 num = pls->first_seq_no + pls->n_fragments - 1;
1424 } else if (pls->n_timelines) {
1426 num = pls->first_seq_no + pls->n_timelines - 1;
1427 for (i = 0; i < pls->n_timelines; i++) {
1428 if (pls->timelines[i]->repeat == -1) {
1429 int length_of_each_segment = pls->timelines[i]->duration / pls->fragment_timescale;
1430 num = c->period_duration / length_of_each_segment;
1432 num += pls->timelines[i]->repeat;
1435 } else if (c->is_live && pls->fragment_duration) {
1436 num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time)) * pls->fragment_timescale) / pls->fragment_duration;
1437 } else if (pls->fragment_duration) {
1438 num = pls->first_seq_no + (c->media_presentation_duration * pls->fragment_timescale) / pls->fragment_duration;
1444 static void move_timelines(struct representation *rep_src, struct representation *rep_dest, DASHContext *c)
1446 if (rep_dest && rep_src ) {
1447 free_timelines_list(rep_dest);
1448 rep_dest->timelines = rep_src->timelines;
1449 rep_dest->n_timelines = rep_src->n_timelines;
1450 rep_dest->first_seq_no = rep_src->first_seq_no;
1451 rep_dest->last_seq_no = calc_max_seg_no(rep_dest, c);
1452 rep_src->timelines = NULL;
1453 rep_src->n_timelines = 0;
1454 rep_dest->cur_seq_no = rep_src->cur_seq_no;
1458 static void move_segments(struct representation *rep_src, struct representation *rep_dest, DASHContext *c)
1460 if (rep_dest && rep_src ) {
1461 free_fragment_list(rep_dest);
1462 if (rep_src->start_number > (rep_dest->start_number + rep_dest->n_fragments))
1463 rep_dest->cur_seq_no = 0;
1465 rep_dest->cur_seq_no += rep_src->start_number - rep_dest->start_number;
1466 rep_dest->fragments = rep_src->fragments;
1467 rep_dest->n_fragments = rep_src->n_fragments;
1468 rep_dest->parent = rep_src->parent;
1469 rep_dest->last_seq_no = calc_max_seg_no(rep_dest, c);
1470 rep_src->fragments = NULL;
1471 rep_src->n_fragments = 0;
1476 static int refresh_manifest(AVFormatContext *s)
1479 DASHContext *c = s->priv_data;
1480 // save current context
1481 int n_videos = c->n_videos;
1482 struct representation **videos = c->videos;
1483 int n_audios = c->n_audios;
1484 struct representation **audios = c->audios;
1485 int n_subtitles = c->n_subtitles;
1486 struct representation **subtitles = c->subtitles;
1487 char *base_url = c->base_url;
1495 c->subtitles = NULL;
1496 ret = parse_manifest(s, s->url, NULL);
1500 if (c->n_videos != n_videos) {
1501 av_log(c, AV_LOG_ERROR,
1502 "new manifest has mismatched no. of video representations, %d -> %d\n",
1503 n_videos, c->n_videos);
1504 return AVERROR_INVALIDDATA;
1506 if (c->n_audios != n_audios) {
1507 av_log(c, AV_LOG_ERROR,
1508 "new manifest has mismatched no. of audio representations, %d -> %d\n",
1509 n_audios, c->n_audios);
1510 return AVERROR_INVALIDDATA;
1512 if (c->n_subtitles != n_subtitles) {
1513 av_log(c, AV_LOG_ERROR,
1514 "new manifest has mismatched no. of subtitles representations, %d -> %d\n",
1515 n_subtitles, c->n_subtitles);
1516 return AVERROR_INVALIDDATA;
1519 for (i = 0; i < n_videos; i++) {
1520 struct representation *cur_video = videos[i];
1521 struct representation *ccur_video = c->videos[i];
1522 if (cur_video->timelines) {
1523 // calc current time
1524 int64_t currentTime = get_segment_start_time_based_on_timeline(cur_video, cur_video->cur_seq_no) / cur_video->fragment_timescale;
1526 ccur_video->cur_seq_no = calc_next_seg_no_from_timelines(ccur_video, currentTime * cur_video->fragment_timescale - 1);
1527 if (ccur_video->cur_seq_no >= 0) {
1528 move_timelines(ccur_video, cur_video, c);
1531 if (cur_video->fragments) {
1532 move_segments(ccur_video, cur_video, c);
1535 for (i = 0; i < n_audios; i++) {
1536 struct representation *cur_audio = audios[i];
1537 struct representation *ccur_audio = c->audios[i];
1538 if (cur_audio->timelines) {
1539 // calc current time
1540 int64_t currentTime = get_segment_start_time_based_on_timeline(cur_audio, cur_audio->cur_seq_no) / cur_audio->fragment_timescale;
1542 ccur_audio->cur_seq_no = calc_next_seg_no_from_timelines(ccur_audio, currentTime * cur_audio->fragment_timescale - 1);
1543 if (ccur_audio->cur_seq_no >= 0) {
1544 move_timelines(ccur_audio, cur_audio, c);
1547 if (cur_audio->fragments) {
1548 move_segments(ccur_audio, cur_audio, c);
1557 c->base_url = base_url;
1560 free_subtitle_list(c);
1566 c->n_subtitles = n_subtitles;
1567 c->subtitles = subtitles;
1568 c->n_audios = n_audios;
1570 c->n_videos = n_videos;
1575 static struct fragment *get_current_fragment(struct representation *pls)
1577 int64_t min_seq_no = 0;
1578 int64_t max_seq_no = 0;
1579 struct fragment *seg = NULL;
1580 struct fragment *seg_ptr = NULL;
1581 DASHContext *c = pls->parent->priv_data;
1583 while (( !ff_check_interrupt(c->interrupt_callback)&& pls->n_fragments > 0)) {
1584 if (pls->cur_seq_no < pls->n_fragments) {
1585 seg_ptr = pls->fragments[pls->cur_seq_no];
1586 seg = av_mallocz(sizeof(struct fragment));
1590 seg->url = av_strdup(seg_ptr->url);
1595 seg->size = seg_ptr->size;
1596 seg->url_offset = seg_ptr->url_offset;
1598 } else if (c->is_live) {
1599 refresh_manifest(pls->parent);
1605 min_seq_no = calc_min_seg_no(pls->parent, pls);
1606 max_seq_no = calc_max_seg_no(pls, c);
1608 if (pls->timelines || pls->fragments) {
1609 refresh_manifest(pls->parent);
1611 if (pls->cur_seq_no <= min_seq_no) {
1612 av_log(pls->parent, AV_LOG_VERBOSE, "old fragment: cur[%"PRId64"] min[%"PRId64"] max[%"PRId64"]\n", (int64_t)pls->cur_seq_no, min_seq_no, max_seq_no);
1613 pls->cur_seq_no = calc_cur_seg_no(pls->parent, pls);
1614 } else if (pls->cur_seq_no > max_seq_no) {
1615 av_log(pls->parent, AV_LOG_VERBOSE, "new fragment: min[%"PRId64"] max[%"PRId64"]\n", min_seq_no, max_seq_no);
1617 seg = av_mallocz(sizeof(struct fragment));
1621 } else if (pls->cur_seq_no <= pls->last_seq_no) {
1622 seg = av_mallocz(sizeof(struct fragment));
1628 char *tmpfilename= av_mallocz(c->max_url_size);
1632 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));
1633 seg->url = av_strireplace(pls->url_template, pls->url_template, tmpfilename);
1635 av_log(pls->parent, AV_LOG_WARNING, "Unable to resolve template url '%s', try to use origin template\n", pls->url_template);
1636 seg->url = av_strdup(pls->url_template);
1638 av_log(pls->parent, AV_LOG_ERROR, "Cannot resolve template url '%s'\n", pls->url_template);
1639 av_free(tmpfilename);
1643 av_free(tmpfilename);
1650 static int read_from_url(struct representation *pls, struct fragment *seg,
1651 uint8_t *buf, int buf_size)
1655 /* limit read if the fragment was only a part of a file */
1657 buf_size = FFMIN(buf_size, pls->cur_seg_size - pls->cur_seg_offset);
1659 ret = avio_read(pls->input, buf, buf_size);
1661 pls->cur_seg_offset += ret;
1666 static int open_input(DASHContext *c, struct representation *pls, struct fragment *seg)
1668 AVDictionary *opts = NULL;
1672 url = av_mallocz(c->max_url_size);
1674 ret = AVERROR(ENOMEM);
1678 if (seg->size >= 0) {
1679 /* try to restrict the HTTP request to the part we want
1680 * (if this is in fact a HTTP request) */
1681 av_dict_set_int(&opts, "offset", seg->url_offset, 0);
1682 av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
1685 ff_make_absolute_url(url, c->max_url_size, c->base_url, seg->url);
1686 av_log(pls->parent, AV_LOG_VERBOSE, "DASH request for url '%s', offset %"PRId64"\n",
1687 url, seg->url_offset);
1688 ret = open_url(pls->parent, &pls->input, url, &c->avio_opts, opts, NULL);
1692 av_dict_free(&opts);
1693 pls->cur_seg_offset = 0;
1694 pls->cur_seg_size = seg->size;
1698 static int update_init_section(struct representation *pls)
1700 static const int max_init_section_size = 1024 * 1024;
1701 DASHContext *c = pls->parent->priv_data;
1706 if (!pls->init_section || pls->init_sec_buf)
1709 ret = open_input(c, pls, pls->init_section);
1711 av_log(pls->parent, AV_LOG_WARNING,
1712 "Failed to open an initialization section\n");
1716 if (pls->init_section->size >= 0)
1717 sec_size = pls->init_section->size;
1718 else if ((urlsize = avio_size(pls->input)) >= 0)
1721 sec_size = max_init_section_size;
1723 av_log(pls->parent, AV_LOG_DEBUG,
1724 "Downloading an initialization section of size %"PRId64"\n",
1727 sec_size = FFMIN(sec_size, max_init_section_size);
1729 av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size);
1731 ret = read_from_url(pls, pls->init_section, pls->init_sec_buf,
1732 pls->init_sec_buf_size);
1733 ff_format_io_close(pls->parent, &pls->input);
1738 pls->init_sec_data_len = ret;
1739 pls->init_sec_buf_read_offset = 0;
1744 static int64_t seek_data(void *opaque, int64_t offset, int whence)
1746 struct representation *v = opaque;
1747 if (v->n_fragments && !v->init_sec_data_len) {
1748 return avio_seek(v->input, offset, whence);
1751 return AVERROR(ENOSYS);
1754 static int read_data(void *opaque, uint8_t *buf, int buf_size)
1757 struct representation *v = opaque;
1758 DASHContext *c = v->parent->priv_data;
1762 free_fragment(&v->cur_seg);
1763 v->cur_seg = get_current_fragment(v);
1769 /* load/update Media Initialization Section, if any */
1770 ret = update_init_section(v);
1774 ret = open_input(c, v, v->cur_seg);
1776 if (ff_check_interrupt(c->interrupt_callback)) {
1780 av_log(v->parent, AV_LOG_WARNING, "Failed to open fragment of playlist\n");
1786 if (v->init_sec_buf_read_offset < v->init_sec_data_len) {
1787 /* Push init section out first before first actual fragment */
1788 int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size);
1789 memcpy(buf, v->init_sec_buf, copy_size);
1790 v->init_sec_buf_read_offset += copy_size;
1795 /* check the v->cur_seg, if it is null, get current and double check if the new v->cur_seg*/
1797 v->cur_seg = get_current_fragment(v);
1803 ret = read_from_url(v, v->cur_seg, buf, buf_size);
1807 if (c->is_live || v->cur_seq_no < v->last_seq_no) {
1808 if (!v->is_restart_needed)
1810 v->is_restart_needed = 1;
1817 static int save_avio_options(AVFormatContext *s)
1819 DASHContext *c = s->priv_data;
1820 const char *opts[] = {
1821 "headers", "user_agent", "cookies", "http_proxy", "referer", "rw_timeout", "icy", NULL };
1822 const char **opt = opts;
1823 uint8_t *buf = NULL;
1827 if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN, &buf) >= 0) {
1828 if (buf[0] != '\0') {
1829 ret = av_dict_set(&c->avio_opts, *opt, buf, AV_DICT_DONT_STRDUP_VAL);
1842 static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url,
1843 int flags, AVDictionary **opts)
1845 av_log(s, AV_LOG_ERROR,
1846 "A DASH playlist item '%s' referred to an external file '%s'. "
1847 "Opening this file was forbidden for security reasons\n",
1849 return AVERROR(EPERM);
1852 static void close_demux_for_component(struct representation *pls)
1854 /* note: the internal buffer could have changed */
1855 av_freep(&pls->pb.buffer);
1856 memset(&pls->pb, 0x00, sizeof(AVIOContext));
1857 pls->ctx->pb = NULL;
1858 avformat_close_input(&pls->ctx);
1861 static int reopen_demux_for_component(AVFormatContext *s, struct representation *pls)
1863 DASHContext *c = s->priv_data;
1864 ff_const59 AVInputFormat *in_fmt = NULL;
1865 AVDictionary *in_fmt_opts = NULL;
1866 uint8_t *avio_ctx_buffer = NULL;
1870 close_demux_for_component(pls);
1873 if (ff_check_interrupt(&s->interrupt_callback)) {
1878 if (!(pls->ctx = avformat_alloc_context())) {
1879 ret = AVERROR(ENOMEM);
1883 avio_ctx_buffer = av_malloc(INITIAL_BUFFER_SIZE);
1884 if (!avio_ctx_buffer ) {
1885 ret = AVERROR(ENOMEM);
1886 avformat_free_context(pls->ctx);
1890 ffio_init_context(&pls->pb, avio_ctx_buffer, INITIAL_BUFFER_SIZE, 0,
1891 pls, read_data, NULL, c->is_live ? NULL : seek_data);
1892 pls->pb.seekable = 0;
1894 if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
1897 pls->ctx->flags = AVFMT_FLAG_CUSTOM_IO;
1898 pls->ctx->probesize = s->probesize > 0 ? s->probesize : 1024 * 4;
1899 pls->ctx->max_analyze_duration = s->max_analyze_duration > 0 ? s->max_analyze_duration : 4 * AV_TIME_BASE;
1900 pls->ctx->interrupt_callback = s->interrupt_callback;
1901 ret = av_probe_input_buffer(&pls->pb, &in_fmt, "", NULL, 0, 0);
1903 av_log(s, AV_LOG_ERROR, "Error when loading first fragment of playlist\n");
1904 avformat_free_context(pls->ctx);
1909 pls->ctx->pb = &pls->pb;
1910 pls->ctx->io_open = nested_io_open;
1912 // provide additional information from mpd if available
1913 ret = avformat_open_input(&pls->ctx, "", in_fmt, &in_fmt_opts); //pls->init_section->url
1914 av_dict_free(&in_fmt_opts);
1917 if (pls->n_fragments) {
1918 #if FF_API_R_FRAME_RATE
1919 if (pls->framerate.den) {
1920 for (i = 0; i < pls->ctx->nb_streams; i++)
1921 pls->ctx->streams[i]->r_frame_rate = pls->framerate;
1924 ret = avformat_find_stream_info(pls->ctx, NULL);
1933 static int open_demux_for_component(AVFormatContext *s, struct representation *pls)
1939 pls->cur_seq_no = calc_cur_seg_no(s, pls);
1941 if (!pls->last_seq_no) {
1942 pls->last_seq_no = calc_max_seg_no(pls, s->priv_data);
1945 ret = reopen_demux_for_component(s, pls);
1949 for (i = 0; i < pls->ctx->nb_streams; i++) {
1950 AVStream *st = avformat_new_stream(s, NULL);
1951 AVStream *ist = pls->ctx->streams[i];
1953 ret = AVERROR(ENOMEM);
1957 avcodec_parameters_copy(st->codecpar, ist->codecpar);
1958 avpriv_set_pts_info(st, ist->pts_wrap_bits, ist->time_base.num, ist->time_base.den);
1961 st->disposition = ist->disposition;
1964 for (int i = 0; i < ist->nb_side_data; i++) {
1965 const AVPacketSideData *sd_src = &ist->side_data[i];
1968 dst_data = av_stream_new_side_data(st, sd_src->type, sd_src->size);
1970 return AVERROR(ENOMEM);
1971 memcpy(dst_data, sd_src->data, sd_src->size);
1980 static int is_common_init_section_exist(struct representation **pls, int n_pls)
1982 struct fragment *first_init_section = pls[0]->init_section;
1984 int64_t url_offset = -1;
1988 if (first_init_section == NULL || n_pls == 0)
1991 url = first_init_section->url;
1992 url_offset = first_init_section->url_offset;
1993 size = pls[0]->init_section->size;
1994 for (i=0;i<n_pls;i++) {
1995 if (av_strcasecmp(pls[i]->init_section->url,url) || pls[i]->init_section->url_offset != url_offset || pls[i]->init_section->size != size) {
2002 static int copy_init_section(struct representation *rep_dest, struct representation *rep_src)
2004 rep_dest->init_sec_buf = av_mallocz(rep_src->init_sec_buf_size);
2005 if (!rep_dest->init_sec_buf) {
2006 av_log(rep_dest->ctx, AV_LOG_WARNING, "Cannot alloc memory for init_sec_buf\n");
2007 return AVERROR(ENOMEM);
2009 memcpy(rep_dest->init_sec_buf, rep_src->init_sec_buf, rep_src->init_sec_data_len);
2010 rep_dest->init_sec_buf_size = rep_src->init_sec_buf_size;
2011 rep_dest->init_sec_data_len = rep_src->init_sec_data_len;
2012 rep_dest->cur_timestamp = rep_src->cur_timestamp;
2017 static int dash_close(AVFormatContext *s);
2019 static int dash_read_header(AVFormatContext *s)
2021 DASHContext *c = s->priv_data;
2022 struct representation *rep;
2025 int stream_index = 0;
2028 c->interrupt_callback = &s->interrupt_callback;
2030 if ((ret = save_avio_options(s)) < 0)
2033 if ((ret = parse_manifest(s, s->url, s->pb)) < 0)
2036 /* If this isn't a live stream, fill the total duration of the
2039 s->duration = (int64_t) c->media_presentation_duration * AV_TIME_BASE;
2041 av_dict_set(&c->avio_opts, "seekable", "0", 0);
2045 c->is_init_section_common_video = is_common_init_section_exist(c->videos, c->n_videos);
2047 /* Open the demuxer for video and audio components if available */
2048 for (i = 0; i < c->n_videos; i++) {
2050 if (i > 0 && c->is_init_section_common_video) {
2051 ret = copy_init_section(rep, c->videos[0]);
2055 ret = open_demux_for_component(s, rep);
2059 rep->stream_index = stream_index;
2064 c->is_init_section_common_audio = is_common_init_section_exist(c->audios, c->n_audios);
2066 for (i = 0; i < c->n_audios; i++) {
2068 if (i > 0 && c->is_init_section_common_audio) {
2069 ret = copy_init_section(rep, c->audios[0]);
2073 ret = open_demux_for_component(s, rep);
2077 rep->stream_index = stream_index;
2082 c->is_init_section_common_audio = is_common_init_section_exist(c->subtitles, c->n_subtitles);
2084 for (i = 0; i < c->n_subtitles; i++) {
2085 rep = c->subtitles[i];
2086 if (i > 0 && c->is_init_section_common_audio) {
2087 ret = copy_init_section(rep, c->subtitles[0]);
2091 ret = open_demux_for_component(s, rep);
2095 rep->stream_index = stream_index;
2099 if (!stream_index) {
2100 ret = AVERROR_INVALIDDATA;
2104 /* Create a program */
2105 program = av_new_program(s, 0);
2107 ret = AVERROR(ENOMEM);
2111 for (i = 0; i < c->n_videos; i++) {
2113 av_program_add_stream_index(s, 0, rep->stream_index);
2114 rep->assoc_stream = s->streams[rep->stream_index];
2115 if (rep->bandwidth > 0)
2116 av_dict_set_int(&rep->assoc_stream->metadata, "variant_bitrate", rep->bandwidth, 0);
2118 av_dict_set(&rep->assoc_stream->metadata, "id", rep->id, 0);
2120 for (i = 0; i < c->n_audios; i++) {
2122 av_program_add_stream_index(s, 0, rep->stream_index);
2123 rep->assoc_stream = s->streams[rep->stream_index];
2124 if (rep->bandwidth > 0)
2125 av_dict_set_int(&rep->assoc_stream->metadata, "variant_bitrate", rep->bandwidth, 0);
2127 av_dict_set(&rep->assoc_stream->metadata, "id", rep->id, 0);
2129 av_dict_set(&rep->assoc_stream->metadata, "language", rep->lang, 0);
2130 av_freep(&rep->lang);
2133 for (i = 0; i < c->n_subtitles; i++) {
2134 rep = c->subtitles[i];
2135 av_program_add_stream_index(s, 0, rep->stream_index);
2136 rep->assoc_stream = s->streams[rep->stream_index];
2138 av_dict_set(&rep->assoc_stream->metadata, "id", rep->id, 0);
2140 av_dict_set(&rep->assoc_stream->metadata, "language", rep->lang, 0);
2141 av_freep(&rep->lang);
2151 static void recheck_discard_flags(AVFormatContext *s, struct representation **p, int n)
2155 for (i = 0; i < n; i++) {
2156 struct representation *pls = p[i];
2157 int needed = !pls->assoc_stream || pls->assoc_stream->discard < AVDISCARD_ALL;
2159 if (needed && !pls->ctx) {
2160 pls->cur_seg_offset = 0;
2161 pls->init_sec_buf_read_offset = 0;
2163 for (j = 0; j < n; j++) {
2164 pls->cur_seq_no = FFMAX(pls->cur_seq_no, p[j]->cur_seq_no);
2166 reopen_demux_for_component(s, pls);
2167 av_log(s, AV_LOG_INFO, "Now receiving stream_index %d\n", pls->stream_index);
2168 } else if (!needed && pls->ctx) {
2169 close_demux_for_component(pls);
2170 ff_format_io_close(pls->parent, &pls->input);
2171 av_log(s, AV_LOG_INFO, "No longer receiving stream_index %d\n", pls->stream_index);
2176 static int dash_read_packet(AVFormatContext *s, AVPacket *pkt)
2178 DASHContext *c = s->priv_data;
2181 struct representation *cur = NULL;
2182 struct representation *rep = NULL;
2184 recheck_discard_flags(s, c->videos, c->n_videos);
2185 recheck_discard_flags(s, c->audios, c->n_audios);
2186 recheck_discard_flags(s, c->subtitles, c->n_subtitles);
2188 for (i = 0; i < c->n_videos; i++) {
2192 if (!cur || rep->cur_timestamp < mints) {
2194 mints = rep->cur_timestamp;
2197 for (i = 0; i < c->n_audios; i++) {
2201 if (!cur || rep->cur_timestamp < mints) {
2203 mints = rep->cur_timestamp;
2207 for (i = 0; i < c->n_subtitles; i++) {
2208 rep = c->subtitles[i];
2211 if (!cur || rep->cur_timestamp < mints) {
2213 mints = rep->cur_timestamp;
2218 return AVERROR_INVALIDDATA;
2220 while (!ff_check_interrupt(c->interrupt_callback) && !ret) {
2221 ret = av_read_frame(cur->ctx, pkt);
2223 /* If we got a packet, return it */
2224 cur->cur_timestamp = av_rescale(pkt->pts, (int64_t)cur->ctx->streams[0]->time_base.num * 90000, cur->ctx->streams[0]->time_base.den);
2225 pkt->stream_index = cur->stream_index;
2228 if (cur->is_restart_needed) {
2229 cur->cur_seg_offset = 0;
2230 cur->init_sec_buf_read_offset = 0;
2231 ff_format_io_close(cur->parent, &cur->input);
2232 ret = reopen_demux_for_component(s, cur);
2233 cur->is_restart_needed = 0;
2239 static int dash_close(AVFormatContext *s)
2241 DASHContext *c = s->priv_data;
2244 free_subtitle_list(c);
2245 av_dict_free(&c->avio_opts);
2246 av_freep(&c->base_url);
2250 static int dash_seek(AVFormatContext *s, struct representation *pls, int64_t seek_pos_msec, int flags, int dry_run)
2255 int64_t duration = 0;
2257 av_log(pls->parent, AV_LOG_VERBOSE, "DASH seek pos[%"PRId64"ms] %s\n",
2258 seek_pos_msec, dry_run ? " (dry)" : "");
2260 // single fragment mode
2261 if (pls->n_fragments == 1) {
2262 pls->cur_timestamp = 0;
2263 pls->cur_seg_offset = 0;
2266 ff_read_frame_flush(pls->ctx);
2267 return av_seek_frame(pls->ctx, -1, seek_pos_msec * 1000, flags);
2270 ff_format_io_close(pls->parent, &pls->input);
2272 // find the nearest fragment
2273 if (pls->n_timelines > 0 && pls->fragment_timescale > 0) {
2274 int64_t num = pls->first_seq_no;
2275 av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with SegmentTimeline start n_timelines[%d] "
2276 "last_seq_no[%"PRId64"].\n",
2277 (int)pls->n_timelines, (int64_t)pls->last_seq_no);
2278 for (i = 0; i < pls->n_timelines; i++) {
2279 if (pls->timelines[i]->starttime > 0) {
2280 duration = pls->timelines[i]->starttime;
2282 duration += pls->timelines[i]->duration;
2283 if (seek_pos_msec < ((duration * 1000) / pls->fragment_timescale)) {
2286 for (j = 0; j < pls->timelines[i]->repeat; j++) {
2287 duration += pls->timelines[i]->duration;
2289 if (seek_pos_msec < ((duration * 1000) / pls->fragment_timescale)) {
2297 pls->cur_seq_no = num > pls->last_seq_no ? pls->last_seq_no : num;
2298 av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with SegmentTimeline end cur_seq_no[%"PRId64"].\n",
2299 (int64_t)pls->cur_seq_no);
2300 } else if (pls->fragment_duration > 0) {
2301 pls->cur_seq_no = pls->first_seq_no + ((seek_pos_msec * pls->fragment_timescale) / pls->fragment_duration) / 1000;
2303 av_log(pls->parent, AV_LOG_ERROR, "dash_seek missing timeline or fragment_duration\n");
2304 pls->cur_seq_no = pls->first_seq_no;
2306 pls->cur_timestamp = 0;
2307 pls->cur_seg_offset = 0;
2308 pls->init_sec_buf_read_offset = 0;
2309 ret = dry_run ? 0 : reopen_demux_for_component(s, pls);
2314 static int dash_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
2317 DASHContext *c = s->priv_data;
2318 int64_t seek_pos_msec = av_rescale_rnd(timestamp, 1000,
2319 s->streams[stream_index]->time_base.den,
2320 flags & AVSEEK_FLAG_BACKWARD ?
2321 AV_ROUND_DOWN : AV_ROUND_UP);
2322 if ((flags & AVSEEK_FLAG_BYTE) || c->is_live)
2323 return AVERROR(ENOSYS);
2325 /* Seek in discarded streams with dry_run=1 to avoid reopening them */
2326 for (i = 0; i < c->n_videos; i++) {
2328 ret = dash_seek(s, c->videos[i], seek_pos_msec, flags, !c->videos[i]->ctx);
2330 for (i = 0; i < c->n_audios; i++) {
2332 ret = dash_seek(s, c->audios[i], seek_pos_msec, flags, !c->audios[i]->ctx);
2334 for (i = 0; i < c->n_subtitles; i++) {
2336 ret = dash_seek(s, c->subtitles[i], seek_pos_msec, flags, !c->subtitles[i]->ctx);
2342 static int dash_probe(const AVProbeData *p)
2344 if (!av_stristr(p->buf, "<MPD"))
2347 if (av_stristr(p->buf, "dash:profile:isoff-on-demand:2011") ||
2348 av_stristr(p->buf, "dash:profile:isoff-live:2011") ||
2349 av_stristr(p->buf, "dash:profile:isoff-live:2012") ||
2350 av_stristr(p->buf, "dash:profile:isoff-main:2011") ||
2351 av_stristr(p->buf, "3GPP:PSS:profile:DASH1")) {
2352 return AVPROBE_SCORE_MAX;
2354 if (av_stristr(p->buf, "dash:profile")) {
2355 return AVPROBE_SCORE_MAX;
2361 #define OFFSET(x) offsetof(DASHContext, x)
2362 #define FLAGS AV_OPT_FLAG_DECODING_PARAM
2363 static const AVOption dash_options[] = {
2364 {"allowed_extensions", "List of file extensions that dash is allowed to access",
2365 OFFSET(allowed_extensions), AV_OPT_TYPE_STRING,
2366 {.str = "aac,m4a,m4s,m4v,mov,mp4,webm,ts"},
2367 INT_MIN, INT_MAX, FLAGS},
2371 static const AVClass dash_class = {
2372 .class_name = "dash",
2373 .item_name = av_default_item_name,
2374 .option = dash_options,
2375 .version = LIBAVUTIL_VERSION_INT,
2378 AVInputFormat ff_dash_demuxer = {
2380 .long_name = NULL_IF_CONFIG_SMALL("Dynamic Adaptive Streaming over HTTP"),
2381 .priv_class = &dash_class,
2382 .priv_data_size = sizeof(DASHContext),
2383 .read_probe = dash_probe,
2384 .read_header = dash_read_header,
2385 .read_packet = dash_read_packet,
2386 .read_close = dash_close,
2387 .read_seek = dash_read_seek,
2388 .flags = AVFMT_NO_BYTE_SEEK,