2 * Dynamic Adaptive Streaming over HTTP demux
3 * Copyright (c) 2017 samsamsam@o2.pl based on HLS demux
4 * Copyright (c) 2017 Steven Liu
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include <libxml/parser.h>
23 #include "libavutil/intreadwrite.h"
24 #include "libavutil/opt.h"
25 #include "libavutil/time.h"
26 #include "libavutil/parseutils.h"
28 #include "avio_internal.h"
31 #define INITIAL_BUFFER_SIZE 32768
40 * reference to : ISO_IEC_23009-1-DASH-2012
42 * Table: Table 17 — Semantics of SegmentTimeline element
45 /* starttime: Element or Attribute Name
46 * specifies the MPD start time, in @timescale units,
47 * the first Segment in the series starts relative to the beginning of the Period.
48 * The value of this attribute must be equal to or greater than the sum of the previous S
49 * element earliest presentation time and the sum of the contiguous Segment durations.
50 * If the value of the attribute is greater than what is expressed by the previous S element,
51 * it expresses discontinuities in the timeline.
52 * If not present then the value shall be assumed to be zero for the first S element
53 * and for the subsequent S elements, the value shall be assumed to be the sum of
54 * the previous S element's earliest presentation time and contiguous duration
55 * (i.e. previous S@starttime + @duration * (@repeat + 1)).
58 /* repeat: Element or Attribute Name
59 * specifies the repeat count of the number of following contiguous Segments with
60 * the same duration expressed by the value of @duration. This value is zero-based
61 * (e.g. a value of three means four Segments in the contiguous series).
64 /* duration: Element or Attribute Name
65 * specifies the Segment duration, in units of the value of the @timescale.
71 * Each playlist has its own demuxer. If it is currently active,
72 * it has an opened AVIOContext too, and potentially an AVPacket
73 * containing the next packet from this stream.
75 struct representation {
79 AVFormatContext *parent;
86 enum AVMediaType type;
90 AVStream *assoc_stream; /* demuxer stream associated with this representation */
93 struct fragment **fragments; /* VOD list of fragment for profile */
96 struct timeline **timelines;
100 int64_t start_number; /* used in case when we have dynamic list of segment to know which segments are new one*/
102 int64_t fragment_duration;
103 int64_t fragment_timescale;
105 int64_t presentation_timeoffset;
108 int64_t cur_seg_offset;
109 int64_t cur_seg_size;
110 struct fragment *cur_seg;
112 /* Currently active Media Initialization Section */
113 struct fragment *init_section;
114 uint8_t *init_sec_buf;
115 uint32_t init_sec_buf_size;
116 uint32_t init_sec_data_len;
117 uint32_t init_sec_buf_read_offset;
118 int64_t cur_timestamp;
119 int is_restart_needed;
122 typedef struct DASHContext {
123 const AVClass *class;
125 char *adaptionset_contenttype_val;
126 char *adaptionset_par_val;
127 char *adaptionset_lang_val;
128 char *adaptionset_minbw_val;
129 char *adaptionset_maxbw_val;
130 char *adaptionset_minwidth_val;
131 char *adaptionset_maxwidth_val;
132 char *adaptionset_minheight_val;
133 char *adaptionset_maxheight_val;
134 char *adaptionset_minframerate_val;
135 char *adaptionset_maxframerate_val;
136 char *adaptionset_segmentalignment_val;
137 char *adaptionset_bitstreamswitching_val;
140 struct representation **videos;
142 struct representation **audios;
144 /* MediaPresentationDescription Attribute */
145 uint64_t media_presentation_duration;
146 uint64_t suggested_presentation_delay;
147 uint64_t availability_start_time;
148 uint64_t availability_end_time;
149 uint64_t publish_time;
150 uint64_t minimum_update_period;
151 uint64_t time_shift_buffer_depth;
152 uint64_t min_buffer_time;
154 /* Period Attribute */
155 uint64_t period_duration;
156 uint64_t period_start;
159 AVIOInterruptCB *interrupt_callback;
160 char *allowed_extensions;
161 AVDictionary *avio_opts;
164 /* Flags for init section*/
165 int is_init_section_common_video;
166 int is_init_section_common_audio;
170 static int ishttp(char *url)
172 const char *proto_name = avio_find_protocol_name(url);
173 return av_strstart(proto_name, "http", NULL);
176 static int aligned(int val)
178 return ((val + 0x3F) >> 6) << 6;
181 static uint64_t get_current_time_in_sec(void)
183 return av_gettime() / 1000000;
186 static uint64_t get_utc_date_time_insec(AVFormatContext *s, const char *datetime)
197 /* ISO-8601 date parser */
201 ret = sscanf(datetime, "%d-%d-%dT%d:%d:%fZ", &year, &month, &day, &hour, &minute, &second);
202 /* year, month, day, hour, minute, second 6 arguments */
204 av_log(s, AV_LOG_WARNING, "get_utc_date_time_insec get a wrong time format\n");
206 timeinfo.tm_year = year - 1900;
207 timeinfo.tm_mon = month - 1;
208 timeinfo.tm_mday = day;
209 timeinfo.tm_hour = hour;
210 timeinfo.tm_min = minute;
211 timeinfo.tm_sec = (int)second;
213 return av_timegm(&timeinfo);
216 static uint32_t get_duration_insec(AVFormatContext *s, const char *duration)
218 /* ISO-8601 duration parser */
226 const char *ptr = duration;
229 if (*ptr == 'P' || *ptr == 'T') {
234 if (sscanf(ptr, "%f%c%n", &value, &type, &size) != 2) {
235 av_log(s, AV_LOG_WARNING, "get_duration_insec get a wrong time format\n");
236 return 0; /* parser error */
240 days = (uint32_t)value;
243 hours = (uint32_t)value;
246 mins = (uint32_t)value;
249 secs = (uint32_t)value;
252 // handle invalid type
257 return ((days * 24 + hours) * 60 + mins) * 60 + secs;
260 static int64_t get_segment_start_time_based_on_timeline(struct representation *pls, int64_t cur_seq_no)
262 int64_t start_time = 0;
267 if (pls->n_timelines) {
268 for (i = 0; i < pls->n_timelines; i++) {
269 if (pls->timelines[i]->starttime > 0) {
270 start_time = pls->timelines[i]->starttime;
272 if (num == cur_seq_no)
275 start_time += pls->timelines[i]->duration;
277 if (pls->timelines[i]->repeat == -1) {
278 start_time = pls->timelines[i]->duration * cur_seq_no;
282 for (j = 0; j < pls->timelines[i]->repeat; j++) {
284 if (num == cur_seq_no)
286 start_time += pls->timelines[i]->duration;
295 static int64_t calc_next_seg_no_from_timelines(struct representation *pls, int64_t cur_time)
300 int64_t start_time = 0;
302 for (i = 0; i < pls->n_timelines; i++) {
303 if (pls->timelines[i]->starttime > 0) {
304 start_time = pls->timelines[i]->starttime;
306 if (start_time > cur_time)
309 start_time += pls->timelines[i]->duration;
310 for (j = 0; j < pls->timelines[i]->repeat; j++) {
312 if (start_time > cur_time)
314 start_time += pls->timelines[i]->duration;
325 static void free_fragment(struct fragment **seg)
330 av_freep(&(*seg)->url);
334 static void free_fragment_list(struct representation *pls)
338 for (i = 0; i < pls->n_fragments; i++) {
339 free_fragment(&pls->fragments[i]);
341 av_freep(&pls->fragments);
342 pls->n_fragments = 0;
345 static void free_timelines_list(struct representation *pls)
349 for (i = 0; i < pls->n_timelines; i++) {
350 av_freep(&pls->timelines[i]);
352 av_freep(&pls->timelines);
353 pls->n_timelines = 0;
356 static void free_representation(struct representation *pls)
358 free_fragment_list(pls);
359 free_timelines_list(pls);
360 free_fragment(&pls->cur_seg);
361 free_fragment(&pls->init_section);
362 av_freep(&pls->init_sec_buf);
363 av_freep(&pls->pb.buffer);
365 ff_format_io_close(pls->parent, &pls->input);
368 avformat_close_input(&pls->ctx);
371 av_freep(&pls->url_template);
375 static void free_video_list(DASHContext *c)
378 for (i = 0; i < c->n_videos; i++) {
379 struct representation *pls = c->videos[i];
380 free_representation(pls);
382 av_freep(&c->videos);
386 static void free_audio_list(DASHContext *c)
389 for (i = 0; i < c->n_audios; i++) {
390 struct representation *pls = c->audios[i];
391 free_representation(pls);
393 av_freep(&c->audios);
397 static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url,
398 AVDictionary *opts, AVDictionary *opts2, int *is_http)
400 DASHContext *c = s->priv_data;
401 AVDictionary *tmp = NULL;
402 const char *proto_name = NULL;
405 av_dict_copy(&tmp, opts, 0);
406 av_dict_copy(&tmp, opts2, 0);
408 if (av_strstart(url, "crypto", NULL)) {
409 if (url[6] == '+' || url[6] == ':')
410 proto_name = avio_find_protocol_name(url + 7);
414 proto_name = avio_find_protocol_name(url);
417 return AVERROR_INVALIDDATA;
419 // only http(s) & file are allowed
420 if (av_strstart(proto_name, "file", NULL)) {
421 if (strcmp(c->allowed_extensions, "ALL") && !av_match_ext(url, c->allowed_extensions)) {
422 av_log(s, AV_LOG_ERROR,
423 "Filename extension of \'%s\' is not a common multimedia extension, blocked for security reasons.\n"
424 "If you wish to override this adjust allowed_extensions, you can set it to \'ALL\' to allow all\n",
426 return AVERROR_INVALIDDATA;
428 } else if (av_strstart(proto_name, "http", NULL)) {
431 return AVERROR_INVALIDDATA;
433 if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':')
435 else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':')
437 else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))
438 return AVERROR_INVALIDDATA;
441 ret = avio_open2(pb, url, AVIO_FLAG_READ, c->interrupt_callback, &tmp);
443 // update cookies on http response with setcookies.
444 char *new_cookies = NULL;
446 if (!(s->flags & AVFMT_FLAG_CUSTOM_IO))
447 av_opt_get(*pb, "cookies", AV_OPT_SEARCH_CHILDREN, (uint8_t**)&new_cookies);
450 av_dict_set(&opts, "cookies", new_cookies, AV_DICT_DONT_STRDUP_VAL);
458 *is_http = av_strstart(proto_name, "http", NULL);
463 static char *get_content_url(xmlNodePtr *baseurl_nodes,
467 char *rep_bandwidth_val,
473 char *tmp_str = av_mallocz(max_url_size);
474 char *tmp_str_2 = av_mallocz(max_url_size);
476 if (!tmp_str || !tmp_str_2) {
480 for (i = 0; i < n_baseurl_nodes; ++i) {
481 if (baseurl_nodes[i] &&
482 baseurl_nodes[i]->children &&
483 baseurl_nodes[i]->children->type == XML_TEXT_NODE) {
484 text = xmlNodeGetContent(baseurl_nodes[i]->children);
486 memset(tmp_str, 0, max_url_size);
487 memset(tmp_str_2, 0, max_url_size);
488 ff_make_absolute_url(tmp_str_2, max_url_size, tmp_str, text);
489 av_strlcpy(tmp_str, tmp_str_2, max_url_size);
496 av_strlcat(tmp_str, (const char*)val, max_url_size);
499 url = av_strireplace(tmp_str, "$RepresentationID$", (const char*)rep_id_val);
503 av_strlcpy(tmp_str, url, max_url_size);
505 if (rep_bandwidth_val && tmp_str[0] != '\0') {
506 // free any previously assigned url before reassigning
508 url = av_strireplace(tmp_str, "$Bandwidth$", (const char*)rep_bandwidth_val);
519 static char *get_val_from_nodes_tab(xmlNodePtr *nodes, const int n_nodes, const char *attrname)
524 for (i = 0; i < n_nodes; ++i) {
526 val = xmlGetProp(nodes[i], attrname);
535 static xmlNodePtr find_child_node_by_name(xmlNodePtr rootnode, const char *nodename)
537 xmlNodePtr node = rootnode;
542 node = xmlFirstElementChild(node);
544 if (!av_strcasecmp(node->name, nodename)) {
547 node = xmlNextElementSibling(node);
552 static enum AVMediaType get_content_type(xmlNodePtr node)
554 enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
560 for (i = 0; i < 2; i++) {
561 attr = i ? "mimeType" : "contentType";
562 val = xmlGetProp(node, attr);
564 if (av_stristr((const char *)val, "video")) {
565 type = AVMEDIA_TYPE_VIDEO;
566 } else if (av_stristr((const char *)val, "audio")) {
567 type = AVMEDIA_TYPE_AUDIO;
576 static struct fragment * get_Fragment(char *range)
578 struct fragment * seg = av_mallocz(sizeof(struct fragment));
585 char *str_end_offset;
586 char *str_offset = av_strtok(range, "-", &str_end_offset);
587 seg->url_offset = strtoll(str_offset, NULL, 10);
588 seg->size = strtoll(str_end_offset, NULL, 10) - seg->url_offset;
594 static int parse_manifest_segmenturlnode(AVFormatContext *s, struct representation *rep,
595 xmlNodePtr fragmenturl_node,
596 xmlNodePtr *baseurl_nodes,
598 char *rep_bandwidth_val)
600 DASHContext *c = s->priv_data;
601 char *initialization_val = NULL;
602 char *media_val = NULL;
603 char *range_val = NULL;
604 int max_url_size = c ? c->max_url_size: MAX_URL_SIZE;
606 if (!av_strcasecmp(fragmenturl_node->name, (const char *)"Initialization")) {
607 initialization_val = xmlGetProp(fragmenturl_node, "sourceURL");
608 range_val = xmlGetProp(fragmenturl_node, "range");
609 if (initialization_val || range_val) {
610 rep->init_section = get_Fragment(range_val);
611 if (!rep->init_section) {
612 xmlFree(initialization_val);
614 return AVERROR(ENOMEM);
616 rep->init_section->url = get_content_url(baseurl_nodes, 4,
622 if (!rep->init_section->url) {
623 av_free(rep->init_section);
624 xmlFree(initialization_val);
626 return AVERROR(ENOMEM);
628 xmlFree(initialization_val);
631 } else if (!av_strcasecmp(fragmenturl_node->name, (const char *)"SegmentURL")) {
632 media_val = xmlGetProp(fragmenturl_node, "media");
633 range_val = xmlGetProp(fragmenturl_node, "mediaRange");
634 if (media_val || range_val) {
635 struct fragment *seg = get_Fragment(range_val);
639 return AVERROR(ENOMEM);
641 seg->url = get_content_url(baseurl_nodes, 4,
650 return AVERROR(ENOMEM);
652 dynarray_add(&rep->fragments, &rep->n_fragments, seg);
661 static int parse_manifest_segmenttimeline(AVFormatContext *s, struct representation *rep,
662 xmlNodePtr fragment_timeline_node)
664 xmlAttrPtr attr = NULL;
667 if (!av_strcasecmp(fragment_timeline_node->name, (const char *)"S")) {
668 struct timeline *tml = av_mallocz(sizeof(struct timeline));
670 return AVERROR(ENOMEM);
672 attr = fragment_timeline_node->properties;
674 val = xmlGetProp(fragment_timeline_node, attr->name);
677 av_log(s, AV_LOG_WARNING, "parse_manifest_segmenttimeline attr->name = %s val is NULL\n", attr->name);
681 if (!av_strcasecmp(attr->name, (const char *)"t")) {
682 tml->starttime = (int64_t)strtoll(val, NULL, 10);
683 } else if (!av_strcasecmp(attr->name, (const char *)"r")) {
684 tml->repeat =(int64_t) strtoll(val, NULL, 10);
685 } else if (!av_strcasecmp(attr->name, (const char *)"d")) {
686 tml->duration = (int64_t)strtoll(val, NULL, 10);
691 dynarray_add(&rep->timelines, &rep->n_timelines, tml);
697 static int resolve_content_path(AVFormatContext *s, const char *url, int *max_url_size, xmlNodePtr *baseurl_nodes, int n_baseurl_nodes) {
699 char *tmp_str = NULL;
701 char *mpdName = NULL;
702 xmlNodePtr node = NULL;
703 char *baseurl = NULL;
704 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]);
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 av_strlcat(tmp_str, text + start, tmp_max_url_size);
790 xmlNodeSetContent(baseurl_nodes[i], tmp_str);
797 if (tmp_max_url_size > *max_url_size) {
798 *max_url_size = tmp_max_url_size;
807 static int parse_manifest_representation(AVFormatContext *s, const char *url,
809 xmlNodePtr adaptionset_node,
810 xmlNodePtr mpd_baseurl_node,
811 xmlNodePtr period_baseurl_node,
812 xmlNodePtr period_segmenttemplate_node,
813 xmlNodePtr period_segmentlist_node,
814 xmlNodePtr fragment_template_node,
815 xmlNodePtr content_component_node,
816 xmlNodePtr adaptionset_baseurl_node,
817 xmlNodePtr adaptionset_segmentlist_node,
818 xmlNodePtr adaptionset_supplementalproperty_node)
821 int32_t audio_rep_idx = 0;
822 int32_t video_rep_idx = 0;
823 DASHContext *c = s->priv_data;
824 struct representation *rep = NULL;
825 struct fragment *seg = NULL;
826 xmlNodePtr representation_segmenttemplate_node = NULL;
827 xmlNodePtr representation_baseurl_node = NULL;
828 xmlNodePtr representation_segmentlist_node = NULL;
829 xmlNodePtr segmentlists_tab[2];
830 xmlNodePtr fragment_timeline_node = NULL;
831 xmlNodePtr fragment_templates_tab[5];
832 char *duration_val = NULL;
833 char *presentation_timeoffset_val = NULL;
834 char *startnumber_val = NULL;
835 char *timescale_val = NULL;
836 char *initialization_val = NULL;
837 char *media_val = NULL;
839 xmlNodePtr baseurl_nodes[4];
840 xmlNodePtr representation_node = node;
841 char *rep_id_val = xmlGetProp(representation_node, "id");
842 char *rep_bandwidth_val = xmlGetProp(representation_node, "bandwidth");
843 char *rep_framerate_val = xmlGetProp(representation_node, "frameRate");
844 enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
846 // try get information from representation
847 if (type == AVMEDIA_TYPE_UNKNOWN)
848 type = get_content_type(representation_node);
849 // try get information from contentComponen
850 if (type == AVMEDIA_TYPE_UNKNOWN)
851 type = get_content_type(content_component_node);
852 // try get information from adaption set
853 if (type == AVMEDIA_TYPE_UNKNOWN)
854 type = get_content_type(adaptionset_node);
855 if (type == AVMEDIA_TYPE_UNKNOWN) {
856 av_log(s, AV_LOG_VERBOSE, "Parsing '%s' - skipp not supported representation type\n", url);
857 } else if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO) {
858 // convert selected representation to our internal struct
859 rep = av_mallocz(sizeof(struct representation));
861 ret = AVERROR(ENOMEM);
864 representation_segmenttemplate_node = find_child_node_by_name(representation_node, "SegmentTemplate");
865 representation_baseurl_node = find_child_node_by_name(representation_node, "BaseURL");
866 representation_segmentlist_node = find_child_node_by_name(representation_node, "SegmentList");
868 baseurl_nodes[0] = mpd_baseurl_node;
869 baseurl_nodes[1] = period_baseurl_node;
870 baseurl_nodes[2] = adaptionset_baseurl_node;
871 baseurl_nodes[3] = representation_baseurl_node;
873 ret = resolve_content_path(s, url, &c->max_url_size, baseurl_nodes, 4);
874 c->max_url_size = aligned(c->max_url_size
875 + (rep_id_val ? strlen(rep_id_val) : 0)
876 + (rep_bandwidth_val ? strlen(rep_bandwidth_val) : 0));
877 if (ret == AVERROR(ENOMEM) || ret == 0) {
880 if (representation_segmenttemplate_node || fragment_template_node || period_segmenttemplate_node) {
881 fragment_timeline_node = NULL;
882 fragment_templates_tab[0] = representation_segmenttemplate_node;
883 fragment_templates_tab[1] = adaptionset_segmentlist_node;
884 fragment_templates_tab[2] = fragment_template_node;
885 fragment_templates_tab[3] = period_segmenttemplate_node;
886 fragment_templates_tab[4] = period_segmentlist_node;
888 presentation_timeoffset_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "presentationTimeOffset");
889 duration_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "duration");
890 startnumber_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "startNumber");
891 timescale_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "timescale");
892 initialization_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "initialization");
893 media_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "media");
895 if (initialization_val) {
896 rep->init_section = av_mallocz(sizeof(struct fragment));
897 if (!rep->init_section) {
899 ret = AVERROR(ENOMEM);
902 c->max_url_size = aligned(c->max_url_size + strlen(initialization_val));
903 rep->init_section->url = get_content_url(baseurl_nodes, 4, c->max_url_size, rep_id_val, rep_bandwidth_val, initialization_val);
904 if (!rep->init_section->url) {
905 av_free(rep->init_section);
907 ret = AVERROR(ENOMEM);
910 rep->init_section->size = -1;
911 xmlFree(initialization_val);
915 c->max_url_size = aligned(c->max_url_size + strlen(media_val));
916 rep->url_template = get_content_url(baseurl_nodes, 4, c->max_url_size, rep_id_val, rep_bandwidth_val, media_val);
920 if (presentation_timeoffset_val) {
921 rep->presentation_timeoffset = (int64_t) strtoll(presentation_timeoffset_val, NULL, 10);
922 av_log(s, AV_LOG_TRACE, "rep->presentation_timeoffset = [%"PRId64"]\n", rep->presentation_timeoffset);
923 xmlFree(presentation_timeoffset_val);
926 rep->fragment_duration = (int64_t) strtoll(duration_val, NULL, 10);
927 av_log(s, AV_LOG_TRACE, "rep->fragment_duration = [%"PRId64"]\n", rep->fragment_duration);
928 xmlFree(duration_val);
931 rep->fragment_timescale = (int64_t) strtoll(timescale_val, NULL, 10);
932 av_log(s, AV_LOG_TRACE, "rep->fragment_timescale = [%"PRId64"]\n", rep->fragment_timescale);
933 xmlFree(timescale_val);
935 if (startnumber_val) {
936 rep->first_seq_no = (int64_t) strtoll(startnumber_val, NULL, 10);
937 av_log(s, AV_LOG_TRACE, "rep->first_seq_no = [%"PRId64"]\n", rep->first_seq_no);
938 xmlFree(startnumber_val);
940 if (adaptionset_supplementalproperty_node) {
941 if (!av_strcasecmp(xmlGetProp(adaptionset_supplementalproperty_node,"schemeIdUri"), "http://dashif.org/guidelines/last-segment-number")) {
942 val = xmlGetProp(adaptionset_supplementalproperty_node,"value");
944 av_log(s, AV_LOG_ERROR, "Missing value attribute in adaptionset_supplementalproperty_node\n");
946 rep->last_seq_no =(int64_t) strtoll(val, NULL, 10) - 1;
952 fragment_timeline_node = find_child_node_by_name(representation_segmenttemplate_node, "SegmentTimeline");
954 if (!fragment_timeline_node)
955 fragment_timeline_node = find_child_node_by_name(fragment_template_node, "SegmentTimeline");
956 if (!fragment_timeline_node)
957 fragment_timeline_node = find_child_node_by_name(adaptionset_segmentlist_node, "SegmentTimeline");
958 if (!fragment_timeline_node)
959 fragment_timeline_node = find_child_node_by_name(period_segmentlist_node, "SegmentTimeline");
960 if (fragment_timeline_node) {
961 fragment_timeline_node = xmlFirstElementChild(fragment_timeline_node);
962 while (fragment_timeline_node) {
963 ret = parse_manifest_segmenttimeline(s, rep, fragment_timeline_node);
967 fragment_timeline_node = xmlNextElementSibling(fragment_timeline_node);
970 } else if (representation_baseurl_node && !representation_segmentlist_node) {
971 seg = av_mallocz(sizeof(struct fragment));
973 ret = AVERROR(ENOMEM);
976 seg->url = get_content_url(baseurl_nodes, 4, c->max_url_size, rep_id_val, rep_bandwidth_val, NULL);
979 ret = AVERROR(ENOMEM);
983 dynarray_add(&rep->fragments, &rep->n_fragments, seg);
984 } else if (representation_segmentlist_node) {
985 // TODO: https://www.brendanlong.com/the-structure-of-an-mpeg-dash-mpd.html
986 // http://www-itec.uni-klu.ac.at/dash/ddash/mpdGenerator.php?fragmentlength=15&type=full
987 xmlNodePtr fragmenturl_node = NULL;
988 segmentlists_tab[0] = representation_segmentlist_node;
989 segmentlists_tab[1] = adaptionset_segmentlist_node;
991 duration_val = get_val_from_nodes_tab(segmentlists_tab, 2, "duration");
992 timescale_val = get_val_from_nodes_tab(segmentlists_tab, 2, "timescale");
994 rep->fragment_duration = (int64_t) strtoll(duration_val, NULL, 10);
995 av_log(s, AV_LOG_TRACE, "rep->fragment_duration = [%"PRId64"]\n", rep->fragment_duration);
996 xmlFree(duration_val);
999 rep->fragment_timescale = (int64_t) strtoll(timescale_val, NULL, 10);
1000 av_log(s, AV_LOG_TRACE, "rep->fragment_timescale = [%"PRId64"]\n", rep->fragment_timescale);
1001 xmlFree(timescale_val);
1003 fragmenturl_node = xmlFirstElementChild(representation_segmentlist_node);
1004 while (fragmenturl_node) {
1005 ret = parse_manifest_segmenturlnode(s, rep, fragmenturl_node,
1012 fragmenturl_node = xmlNextElementSibling(fragmenturl_node);
1015 fragment_timeline_node = find_child_node_by_name(representation_segmenttemplate_node, "SegmentTimeline");
1017 if (!fragment_timeline_node)
1018 fragment_timeline_node = find_child_node_by_name(fragment_template_node, "SegmentTimeline");
1019 if (!fragment_timeline_node)
1020 fragment_timeline_node = find_child_node_by_name(adaptionset_segmentlist_node, "SegmentTimeline");
1021 if (!fragment_timeline_node)
1022 fragment_timeline_node = find_child_node_by_name(period_segmentlist_node, "SegmentTimeline");
1023 if (fragment_timeline_node) {
1024 fragment_timeline_node = xmlFirstElementChild(fragment_timeline_node);
1025 while (fragment_timeline_node) {
1026 ret = parse_manifest_segmenttimeline(s, rep, fragment_timeline_node);
1030 fragment_timeline_node = xmlNextElementSibling(fragment_timeline_node);
1034 free_representation(rep);
1036 av_log(s, AV_LOG_ERROR, "Unknown format of Representation node id[%s] \n", (const char *)rep_id_val);
1040 if (rep->fragment_duration > 0 && !rep->fragment_timescale)
1041 rep->fragment_timescale = 1;
1042 rep->bandwidth = rep_bandwidth_val ? atoi(rep_bandwidth_val) : 0;
1043 strncpy(rep->id, rep_id_val ? rep_id_val : "", sizeof(rep->id));
1044 rep->framerate = av_make_q(0, 0);
1045 if (type == AVMEDIA_TYPE_VIDEO && rep_framerate_val) {
1046 ret = av_parse_video_rate(&rep->framerate, rep_framerate_val);
1048 av_log(s, AV_LOG_VERBOSE, "Ignoring invalid frame rate '%s'\n", rep_framerate_val);
1051 if (type == AVMEDIA_TYPE_VIDEO) {
1052 rep->rep_idx = video_rep_idx;
1053 dynarray_add(&c->videos, &c->n_videos, rep);
1055 rep->rep_idx = audio_rep_idx;
1056 dynarray_add(&c->audios, &c->n_audios, rep);
1061 video_rep_idx += type == AVMEDIA_TYPE_VIDEO;
1062 audio_rep_idx += type == AVMEDIA_TYPE_AUDIO;
1066 xmlFree(rep_id_val);
1067 if (rep_bandwidth_val)
1068 xmlFree(rep_bandwidth_val);
1069 if (rep_framerate_val)
1070 xmlFree(rep_framerate_val);
1075 static int parse_manifest_adaptationset(AVFormatContext *s, const char *url,
1076 xmlNodePtr adaptionset_node,
1077 xmlNodePtr mpd_baseurl_node,
1078 xmlNodePtr period_baseurl_node,
1079 xmlNodePtr period_segmenttemplate_node,
1080 xmlNodePtr period_segmentlist_node)
1083 DASHContext *c = s->priv_data;
1084 xmlNodePtr fragment_template_node = NULL;
1085 xmlNodePtr content_component_node = NULL;
1086 xmlNodePtr adaptionset_baseurl_node = NULL;
1087 xmlNodePtr adaptionset_segmentlist_node = NULL;
1088 xmlNodePtr adaptionset_supplementalproperty_node = NULL;
1089 xmlNodePtr node = NULL;
1090 c->adaptionset_contenttype_val = xmlGetProp(adaptionset_node, "contentType");
1091 c->adaptionset_par_val = xmlGetProp(adaptionset_node, "par");
1092 c->adaptionset_lang_val = xmlGetProp(adaptionset_node, "lang");
1093 c->adaptionset_minbw_val = xmlGetProp(adaptionset_node, "minBandwidth");
1094 c->adaptionset_maxbw_val = xmlGetProp(adaptionset_node, "maxBandwidth");
1095 c->adaptionset_minwidth_val = xmlGetProp(adaptionset_node, "minWidth");
1096 c->adaptionset_maxwidth_val = xmlGetProp(adaptionset_node, "maxWidth");
1097 c->adaptionset_minheight_val = xmlGetProp(adaptionset_node, "minHeight");
1098 c->adaptionset_maxheight_val = xmlGetProp(adaptionset_node, "maxHeight");
1099 c->adaptionset_minframerate_val = xmlGetProp(adaptionset_node, "minFrameRate");
1100 c->adaptionset_maxframerate_val = xmlGetProp(adaptionset_node, "maxFrameRate");
1101 c->adaptionset_segmentalignment_val = xmlGetProp(adaptionset_node, "segmentAlignment");
1102 c->adaptionset_bitstreamswitching_val = xmlGetProp(adaptionset_node, "bitstreamSwitching");
1104 node = xmlFirstElementChild(adaptionset_node);
1106 if (!av_strcasecmp(node->name, (const char *)"SegmentTemplate")) {
1107 fragment_template_node = node;
1108 } else if (!av_strcasecmp(node->name, (const char *)"ContentComponent")) {
1109 content_component_node = node;
1110 } else if (!av_strcasecmp(node->name, (const char *)"BaseURL")) {
1111 adaptionset_baseurl_node = node;
1112 } else if (!av_strcasecmp(node->name, (const char *)"SegmentList")) {
1113 adaptionset_segmentlist_node = node;
1114 } else if (!av_strcasecmp(node->name, (const char *)"SupplementalProperty")) {
1115 adaptionset_supplementalproperty_node = node;
1116 } else if (!av_strcasecmp(node->name, (const char *)"Representation")) {
1117 ret = parse_manifest_representation(s, url, node,
1120 period_baseurl_node,
1121 period_segmenttemplate_node,
1122 period_segmentlist_node,
1123 fragment_template_node,
1124 content_component_node,
1125 adaptionset_baseurl_node,
1126 adaptionset_segmentlist_node,
1127 adaptionset_supplementalproperty_node);
1132 node = xmlNextElementSibling(node);
1137 static int parse_manifest(AVFormatContext *s, const char *url, AVIOContext *in)
1139 DASHContext *c = s->priv_data;
1142 uint8_t *new_url = NULL;
1143 int64_t filesize = 0;
1144 char *buffer = NULL;
1145 AVDictionary *opts = NULL;
1147 xmlNodePtr root_element = NULL;
1148 xmlNodePtr node = NULL;
1149 xmlNodePtr period_node = NULL;
1150 xmlNodePtr tmp_node = NULL;
1151 xmlNodePtr mpd_baseurl_node = NULL;
1152 xmlNodePtr period_baseurl_node = NULL;
1153 xmlNodePtr period_segmenttemplate_node = NULL;
1154 xmlNodePtr period_segmentlist_node = NULL;
1155 xmlNodePtr adaptionset_node = NULL;
1156 xmlAttrPtr attr = NULL;
1158 uint32_t period_duration_sec = 0;
1159 uint32_t period_start_sec = 0;
1164 av_dict_copy(&opts, c->avio_opts, 0);
1165 ret = avio_open2(&in, url, AVIO_FLAG_READ, c->interrupt_callback, &opts);
1166 av_dict_free(&opts);
1171 if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >= 0) {
1172 c->base_url = av_strdup(new_url);
1174 c->base_url = av_strdup(url);
1177 filesize = avio_size(in);
1178 if (filesize <= 0) {
1179 filesize = 8 * 1024;
1182 buffer = av_mallocz(filesize);
1184 av_free(c->base_url);
1185 return AVERROR(ENOMEM);
1188 filesize = avio_read(in, buffer, filesize);
1189 if (filesize <= 0) {
1190 av_log(s, AV_LOG_ERROR, "Unable to read to offset '%s'\n", url);
1191 ret = AVERROR_INVALIDDATA;
1195 doc = xmlReadMemory(buffer, filesize, c->base_url, NULL, 0);
1196 root_element = xmlDocGetRootElement(doc);
1197 node = root_element;
1200 ret = AVERROR_INVALIDDATA;
1201 av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing root node\n", url);
1205 if (node->type != XML_ELEMENT_NODE ||
1206 av_strcasecmp(node->name, (const char *)"MPD")) {
1207 ret = AVERROR_INVALIDDATA;
1208 av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - wrong root node name[%s] type[%d]\n", url, node->name, (int)node->type);
1212 val = xmlGetProp(node, "type");
1214 av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing type attrib\n", url);
1215 ret = AVERROR_INVALIDDATA;
1218 if (!av_strcasecmp(val, (const char *)"dynamic"))
1222 attr = node->properties;
1224 val = xmlGetProp(node, attr->name);
1226 if (!av_strcasecmp(attr->name, (const char *)"availabilityStartTime")) {
1227 c->availability_start_time = get_utc_date_time_insec(s, (const char *)val);
1228 av_log(s, AV_LOG_TRACE, "c->availability_start_time = [%"PRId64"]\n", c->availability_start_time);
1229 } else if (!av_strcasecmp(attr->name, (const char *)"availabilityEndTime")) {
1230 c->availability_end_time = get_utc_date_time_insec(s, (const char *)val);
1231 av_log(s, AV_LOG_TRACE, "c->availability_end_time = [%"PRId64"]\n", c->availability_end_time);
1232 } else if (!av_strcasecmp(attr->name, (const char *)"publishTime")) {
1233 c->publish_time = get_utc_date_time_insec(s, (const char *)val);
1234 av_log(s, AV_LOG_TRACE, "c->publish_time = [%"PRId64"]\n", c->publish_time);
1235 } else if (!av_strcasecmp(attr->name, (const char *)"minimumUpdatePeriod")) {
1236 c->minimum_update_period = get_duration_insec(s, (const char *)val);
1237 av_log(s, AV_LOG_TRACE, "c->minimum_update_period = [%"PRId64"]\n", c->minimum_update_period);
1238 } else if (!av_strcasecmp(attr->name, (const char *)"timeShiftBufferDepth")) {
1239 c->time_shift_buffer_depth = get_duration_insec(s, (const char *)val);
1240 av_log(s, AV_LOG_TRACE, "c->time_shift_buffer_depth = [%"PRId64"]\n", c->time_shift_buffer_depth);
1241 } else if (!av_strcasecmp(attr->name, (const char *)"minBufferTime")) {
1242 c->min_buffer_time = get_duration_insec(s, (const char *)val);
1243 av_log(s, AV_LOG_TRACE, "c->min_buffer_time = [%"PRId64"]\n", c->min_buffer_time);
1244 } else if (!av_strcasecmp(attr->name, (const char *)"suggestedPresentationDelay")) {
1245 c->suggested_presentation_delay = get_duration_insec(s, (const char *)val);
1246 av_log(s, AV_LOG_TRACE, "c->suggested_presentation_delay = [%"PRId64"]\n", c->suggested_presentation_delay);
1247 } else if (!av_strcasecmp(attr->name, (const char *)"mediaPresentationDuration")) {
1248 c->media_presentation_duration = get_duration_insec(s, (const char *)val);
1249 av_log(s, AV_LOG_TRACE, "c->media_presentation_duration = [%"PRId64"]\n", c->media_presentation_duration);
1255 tmp_node = find_child_node_by_name(node, "BaseURL");
1257 mpd_baseurl_node = xmlCopyNode(tmp_node,1);
1259 mpd_baseurl_node = xmlNewNode(NULL, "BaseURL");
1262 // at now we can handle only one period, with the longest duration
1263 node = xmlFirstElementChild(node);
1265 if (!av_strcasecmp(node->name, (const char *)"Period")) {
1266 period_duration_sec = 0;
1267 period_start_sec = 0;
1268 attr = node->properties;
1270 val = xmlGetProp(node, attr->name);
1271 if (!av_strcasecmp(attr->name, (const char *)"duration")) {
1272 period_duration_sec = get_duration_insec(s, (const char *)val);
1273 } else if (!av_strcasecmp(attr->name, (const char *)"start")) {
1274 period_start_sec = get_duration_insec(s, (const char *)val);
1279 if ((period_duration_sec) >= (c->period_duration)) {
1281 c->period_duration = period_duration_sec;
1282 c->period_start = period_start_sec;
1283 if (c->period_start > 0)
1284 c->media_presentation_duration = c->period_duration;
1287 node = xmlNextElementSibling(node);
1290 av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing Period node\n", url);
1291 ret = AVERROR_INVALIDDATA;
1295 adaptionset_node = xmlFirstElementChild(period_node);
1296 while (adaptionset_node) {
1297 if (!av_strcasecmp(adaptionset_node->name, (const char *)"BaseURL")) {
1298 period_baseurl_node = adaptionset_node;
1299 } else if (!av_strcasecmp(adaptionset_node->name, (const char *)"SegmentTemplate")) {
1300 period_segmenttemplate_node = adaptionset_node;
1301 } else if (!av_strcasecmp(adaptionset_node->name, (const char *)"SegmentList")) {
1302 period_segmentlist_node = adaptionset_node;
1303 } else if (!av_strcasecmp(adaptionset_node->name, (const char *)"AdaptationSet")) {
1304 parse_manifest_adaptationset(s, url, adaptionset_node, mpd_baseurl_node, period_baseurl_node, period_segmenttemplate_node, period_segmentlist_node);
1306 adaptionset_node = xmlNextElementSibling(adaptionset_node);
1309 /*free the document */
1312 xmlFreeNode(mpd_baseurl_node);
1323 static int64_t calc_cur_seg_no(AVFormatContext *s, struct representation *pls)
1325 DASHContext *c = s->priv_data;
1327 int64_t start_time_offset = 0;
1330 if (pls->n_fragments) {
1331 av_log(s, AV_LOG_TRACE, "in n_fragments mode\n");
1332 num = pls->first_seq_no;
1333 } else if (pls->n_timelines) {
1334 av_log(s, AV_LOG_TRACE, "in n_timelines mode\n");
1335 start_time_offset = get_segment_start_time_based_on_timeline(pls, 0xFFFFFFFF) - 60 * pls->fragment_timescale; // 60 seconds before end
1336 num = calc_next_seg_no_from_timelines(pls, start_time_offset);
1338 num = pls->first_seq_no;
1340 num += pls->first_seq_no;
1341 } else if (pls->fragment_duration){
1342 av_log(s, AV_LOG_TRACE, "in fragment_duration mode fragment_timescale = %"PRId64", presentation_timeoffset = %"PRId64"\n", pls->fragment_timescale, pls->presentation_timeoffset);
1343 if (pls->presentation_timeoffset) {
1344 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;
1345 } else if (c->publish_time > 0 && !c->availability_start_time) {
1346 if (c->min_buffer_time) {
1347 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;
1349 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;
1352 num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time) - c->suggested_presentation_delay) * pls->fragment_timescale) / pls->fragment_duration;
1356 num = pls->first_seq_no;
1361 static int64_t calc_min_seg_no(AVFormatContext *s, struct representation *pls)
1363 DASHContext *c = s->priv_data;
1366 if (c->is_live && pls->fragment_duration) {
1367 av_log(s, AV_LOG_TRACE, "in live mode\n");
1368 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;
1370 num = pls->first_seq_no;
1375 static int64_t calc_max_seg_no(struct representation *pls, DASHContext *c)
1379 if (pls->n_fragments) {
1380 num = pls->first_seq_no + pls->n_fragments - 1;
1381 } else if (pls->n_timelines) {
1383 num = pls->first_seq_no + pls->n_timelines - 1;
1384 for (i = 0; i < pls->n_timelines; i++) {
1385 if (pls->timelines[i]->repeat == -1) {
1386 int length_of_each_segment = pls->timelines[i]->duration / pls->fragment_timescale;
1387 num = c->period_duration / length_of_each_segment;
1389 num += pls->timelines[i]->repeat;
1392 } else if (c->is_live && pls->fragment_duration) {
1393 num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time)) * pls->fragment_timescale) / pls->fragment_duration;
1394 } else if (pls->fragment_duration) {
1395 num = pls->first_seq_no + (c->media_presentation_duration * pls->fragment_timescale) / pls->fragment_duration;
1401 static void move_timelines(struct representation *rep_src, struct representation *rep_dest, DASHContext *c)
1403 if (rep_dest && rep_src ) {
1404 free_timelines_list(rep_dest);
1405 rep_dest->timelines = rep_src->timelines;
1406 rep_dest->n_timelines = rep_src->n_timelines;
1407 rep_dest->first_seq_no = rep_src->first_seq_no;
1408 rep_dest->last_seq_no = calc_max_seg_no(rep_dest, c);
1409 rep_src->timelines = NULL;
1410 rep_src->n_timelines = 0;
1411 rep_dest->cur_seq_no = rep_src->cur_seq_no;
1415 static void move_segments(struct representation *rep_src, struct representation *rep_dest, DASHContext *c)
1417 if (rep_dest && rep_src ) {
1418 free_fragment_list(rep_dest);
1419 if (rep_src->start_number > (rep_dest->start_number + rep_dest->n_fragments))
1420 rep_dest->cur_seq_no = 0;
1422 rep_dest->cur_seq_no += rep_src->start_number - rep_dest->start_number;
1423 rep_dest->fragments = rep_src->fragments;
1424 rep_dest->n_fragments = rep_src->n_fragments;
1425 rep_dest->parent = rep_src->parent;
1426 rep_dest->last_seq_no = calc_max_seg_no(rep_dest, c);
1427 rep_src->fragments = NULL;
1428 rep_src->n_fragments = 0;
1433 static int refresh_manifest(AVFormatContext *s)
1437 DASHContext *c = s->priv_data;
1439 // save current context
1440 int n_videos = c->n_videos;
1441 struct representation **videos = c->videos;
1442 int n_audios = c->n_audios;
1443 struct representation **audios = c->audios;
1444 char *base_url = c->base_url;
1451 ret = parse_manifest(s, s->url, NULL);
1455 if (c->n_videos != n_videos) {
1456 av_log(c, AV_LOG_ERROR,
1457 "new manifest has mismatched no. of video representations, %d -> %d\n",
1458 n_videos, c->n_videos);
1459 return AVERROR_INVALIDDATA;
1461 if (c->n_audios != n_audios) {
1462 av_log(c, AV_LOG_ERROR,
1463 "new manifest has mismatched no. of audio representations, %d -> %d\n",
1464 n_audios, c->n_audios);
1465 return AVERROR_INVALIDDATA;
1468 for (i = 0; i < n_videos; i++) {
1469 struct representation *cur_video = videos[i];
1470 struct representation *ccur_video = c->videos[i];
1471 if (cur_video->timelines) {
1472 // calc current time
1473 int64_t currentTime = get_segment_start_time_based_on_timeline(cur_video, cur_video->cur_seq_no) / cur_video->fragment_timescale;
1475 ccur_video->cur_seq_no = calc_next_seg_no_from_timelines(ccur_video, currentTime * cur_video->fragment_timescale - 1);
1476 if (ccur_video->cur_seq_no >= 0) {
1477 move_timelines(ccur_video, cur_video, c);
1480 if (cur_video->fragments) {
1481 move_segments(ccur_video, cur_video, c);
1484 for (i = 0; i < n_audios; i++) {
1485 struct representation *cur_audio = audios[i];
1486 struct representation *ccur_audio = c->audios[i];
1487 if (cur_audio->timelines) {
1488 // calc current time
1489 int64_t currentTime = get_segment_start_time_based_on_timeline(cur_audio, cur_audio->cur_seq_no) / cur_audio->fragment_timescale;
1491 ccur_audio->cur_seq_no = calc_next_seg_no_from_timelines(ccur_audio, currentTime * cur_audio->fragment_timescale - 1);
1492 if (ccur_audio->cur_seq_no >= 0) {
1493 move_timelines(ccur_audio, cur_audio, c);
1496 if (cur_audio->fragments) {
1497 move_segments(ccur_audio, cur_audio, c);
1506 c->base_url = base_url;
1511 c->n_audios = n_audios;
1513 c->n_videos = n_videos;
1518 static struct fragment *get_current_fragment(struct representation *pls)
1520 int64_t min_seq_no = 0;
1521 int64_t max_seq_no = 0;
1522 struct fragment *seg = NULL;
1523 struct fragment *seg_ptr = NULL;
1524 DASHContext *c = pls->parent->priv_data;
1526 while (( !ff_check_interrupt(c->interrupt_callback)&& pls->n_fragments > 0)) {
1527 if (pls->cur_seq_no < pls->n_fragments) {
1528 seg_ptr = pls->fragments[pls->cur_seq_no];
1529 seg = av_mallocz(sizeof(struct fragment));
1533 seg->url = av_strdup(seg_ptr->url);
1538 seg->size = seg_ptr->size;
1539 seg->url_offset = seg_ptr->url_offset;
1541 } else if (c->is_live) {
1542 refresh_manifest(pls->parent);
1548 min_seq_no = calc_min_seg_no(pls->parent, pls);
1549 max_seq_no = calc_max_seg_no(pls, c);
1551 if (pls->timelines || pls->fragments) {
1552 refresh_manifest(pls->parent);
1554 if (pls->cur_seq_no <= min_seq_no) {
1555 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);
1556 pls->cur_seq_no = calc_cur_seg_no(pls->parent, pls);
1557 } else if (pls->cur_seq_no > max_seq_no) {
1558 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);
1560 seg = av_mallocz(sizeof(struct fragment));
1564 } else if (pls->cur_seq_no <= pls->last_seq_no) {
1565 seg = av_mallocz(sizeof(struct fragment));
1571 char *tmpfilename= av_mallocz(c->max_url_size);
1575 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));
1576 seg->url = av_strireplace(pls->url_template, pls->url_template, tmpfilename);
1578 av_log(pls->parent, AV_LOG_WARNING, "Unable to resolve template url '%s', try to use origin template\n", pls->url_template);
1579 seg->url = av_strdup(pls->url_template);
1581 av_log(pls->parent, AV_LOG_ERROR, "Cannot resolve template url '%s'\n", pls->url_template);
1582 av_free(tmpfilename);
1586 av_free(tmpfilename);
1593 static int read_from_url(struct representation *pls, struct fragment *seg,
1594 uint8_t *buf, int buf_size)
1598 /* limit read if the fragment was only a part of a file */
1600 buf_size = FFMIN(buf_size, pls->cur_seg_size - pls->cur_seg_offset);
1602 ret = avio_read(pls->input, buf, buf_size);
1604 pls->cur_seg_offset += ret;
1609 static int open_input(DASHContext *c, struct representation *pls, struct fragment *seg)
1611 AVDictionary *opts = NULL;
1615 url = av_mallocz(c->max_url_size);
1620 if (seg->size >= 0) {
1621 /* try to restrict the HTTP request to the part we want
1622 * (if this is in fact a HTTP request) */
1623 av_dict_set_int(&opts, "offset", seg->url_offset, 0);
1624 av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
1627 ff_make_absolute_url(url, c->max_url_size, c->base_url, seg->url);
1628 av_log(pls->parent, AV_LOG_VERBOSE, "DASH request for url '%s', offset %"PRId64", playlist %d\n",
1629 url, seg->url_offset, pls->rep_idx);
1630 ret = open_url(pls->parent, &pls->input, url, c->avio_opts, opts, NULL);
1637 av_dict_free(&opts);
1638 pls->cur_seg_offset = 0;
1639 pls->cur_seg_size = seg->size;
1643 static int update_init_section(struct representation *pls)
1645 static const int max_init_section_size = 1024 * 1024;
1646 DASHContext *c = pls->parent->priv_data;
1651 if (!pls->init_section || pls->init_sec_buf)
1654 ret = open_input(c, pls, pls->init_section);
1656 av_log(pls->parent, AV_LOG_WARNING,
1657 "Failed to open an initialization section in playlist %d\n",
1662 if (pls->init_section->size >= 0)
1663 sec_size = pls->init_section->size;
1664 else if ((urlsize = avio_size(pls->input)) >= 0)
1667 sec_size = max_init_section_size;
1669 av_log(pls->parent, AV_LOG_DEBUG,
1670 "Downloading an initialization section of size %"PRId64"\n",
1673 sec_size = FFMIN(sec_size, max_init_section_size);
1675 av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size);
1677 ret = read_from_url(pls, pls->init_section, pls->init_sec_buf,
1678 pls->init_sec_buf_size);
1679 ff_format_io_close(pls->parent, &pls->input);
1684 pls->init_sec_data_len = ret;
1685 pls->init_sec_buf_read_offset = 0;
1690 static int64_t seek_data(void *opaque, int64_t offset, int whence)
1692 struct representation *v = opaque;
1693 if (v->n_fragments && !v->init_sec_data_len) {
1694 return avio_seek(v->input, offset, whence);
1697 return AVERROR(ENOSYS);
1700 static int read_data(void *opaque, uint8_t *buf, int buf_size)
1703 struct representation *v = opaque;
1704 DASHContext *c = v->parent->priv_data;
1708 free_fragment(&v->cur_seg);
1709 v->cur_seg = get_current_fragment(v);
1715 /* load/update Media Initialization Section, if any */
1716 ret = update_init_section(v);
1720 ret = open_input(c, v, v->cur_seg);
1722 if (ff_check_interrupt(c->interrupt_callback)) {
1726 av_log(v->parent, AV_LOG_WARNING, "Failed to open fragment of playlist %d\n", v->rep_idx);
1732 if (v->init_sec_buf_read_offset < v->init_sec_data_len) {
1733 /* Push init section out first before first actual fragment */
1734 int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size);
1735 memcpy(buf, v->init_sec_buf, copy_size);
1736 v->init_sec_buf_read_offset += copy_size;
1741 /* check the v->cur_seg, if it is null, get current and double check if the new v->cur_seg*/
1743 v->cur_seg = get_current_fragment(v);
1749 ret = read_from_url(v, v->cur_seg, buf, buf_size);
1753 if (c->is_live || v->cur_seq_no < v->last_seq_no) {
1754 if (!v->is_restart_needed)
1756 v->is_restart_needed = 1;
1763 static int save_avio_options(AVFormatContext *s)
1765 DASHContext *c = s->priv_data;
1766 const char *opts[] = { "headers", "user_agent", "cookies", NULL }, **opt = opts;
1767 uint8_t *buf = NULL;
1771 if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN, &buf) >= 0) {
1772 if (buf[0] != '\0') {
1773 ret = av_dict_set(&c->avio_opts, *opt, buf, AV_DICT_DONT_STRDUP_VAL);
1788 static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url,
1789 int flags, AVDictionary **opts)
1791 av_log(s, AV_LOG_ERROR,
1792 "A DASH playlist item '%s' referred to an external file '%s'. "
1793 "Opening this file was forbidden for security reasons\n",
1795 return AVERROR(EPERM);
1798 static void close_demux_for_component(struct representation *pls)
1800 /* note: the internal buffer could have changed */
1801 av_freep(&pls->pb.buffer);
1802 memset(&pls->pb, 0x00, sizeof(AVIOContext));
1803 pls->ctx->pb = NULL;
1804 avformat_close_input(&pls->ctx);
1808 static int reopen_demux_for_component(AVFormatContext *s, struct representation *pls)
1810 DASHContext *c = s->priv_data;
1811 AVInputFormat *in_fmt = NULL;
1812 AVDictionary *in_fmt_opts = NULL;
1813 uint8_t *avio_ctx_buffer = NULL;
1817 close_demux_for_component(pls);
1820 if (ff_check_interrupt(&s->interrupt_callback)) {
1825 if (!(pls->ctx = avformat_alloc_context())) {
1826 ret = AVERROR(ENOMEM);
1830 avio_ctx_buffer = av_malloc(INITIAL_BUFFER_SIZE);
1831 if (!avio_ctx_buffer ) {
1832 ret = AVERROR(ENOMEM);
1833 avformat_free_context(pls->ctx);
1838 ffio_init_context(&pls->pb, avio_ctx_buffer , INITIAL_BUFFER_SIZE, 0, pls, read_data, NULL, NULL);
1840 ffio_init_context(&pls->pb, avio_ctx_buffer , INITIAL_BUFFER_SIZE, 0, pls, read_data, NULL, seek_data);
1842 pls->pb.seekable = 0;
1844 if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
1847 pls->ctx->flags = AVFMT_FLAG_CUSTOM_IO;
1848 pls->ctx->probesize = 1024 * 4;
1849 pls->ctx->max_analyze_duration = 4 * AV_TIME_BASE;
1850 ret = av_probe_input_buffer(&pls->pb, &in_fmt, "", NULL, 0, 0);
1852 av_log(s, AV_LOG_ERROR, "Error when loading first fragment, playlist %d\n", (int)pls->rep_idx);
1853 avformat_free_context(pls->ctx);
1858 pls->ctx->pb = &pls->pb;
1859 pls->ctx->io_open = nested_io_open;
1861 // provide additional information from mpd if available
1862 ret = avformat_open_input(&pls->ctx, "", in_fmt, &in_fmt_opts); //pls->init_section->url
1863 av_dict_free(&in_fmt_opts);
1866 if (pls->n_fragments) {
1867 #if FF_API_R_FRAME_RATE
1868 if (pls->framerate.den) {
1869 for (i = 0; i < pls->ctx->nb_streams; i++)
1870 pls->ctx->streams[i]->r_frame_rate = pls->framerate;
1874 ret = avformat_find_stream_info(pls->ctx, NULL);
1883 static int open_demux_for_component(AVFormatContext *s, struct representation *pls)
1889 pls->cur_seq_no = calc_cur_seg_no(s, pls);
1891 if (!pls->last_seq_no) {
1892 pls->last_seq_no = calc_max_seg_no(pls, s->priv_data);
1895 ret = reopen_demux_for_component(s, pls);
1899 for (i = 0; i < pls->ctx->nb_streams; i++) {
1900 AVStream *st = avformat_new_stream(s, NULL);
1901 AVStream *ist = pls->ctx->streams[i];
1903 ret = AVERROR(ENOMEM);
1907 avcodec_parameters_copy(st->codecpar, pls->ctx->streams[i]->codecpar);
1908 avpriv_set_pts_info(st, ist->pts_wrap_bits, ist->time_base.num, ist->time_base.den);
1916 static int is_common_init_section_exist(struct representation **pls, int n_pls)
1918 struct fragment *first_init_section = pls[0]->init_section;
1920 int64_t url_offset = -1;
1924 if (first_init_section == NULL || n_pls == 0)
1927 url = first_init_section->url;
1928 url_offset = first_init_section->url_offset;
1929 size = pls[0]->init_section->size;
1930 for (i=0;i<n_pls;i++) {
1931 if (av_strcasecmp(pls[i]->init_section->url,url) || pls[i]->init_section->url_offset != url_offset || pls[i]->init_section->size != size) {
1938 static void copy_init_section(struct representation *rep_dest, struct representation *rep_src)
1940 rep_dest->init_sec_buf = av_mallocz(rep_src->init_sec_buf_size);
1941 memcpy(rep_dest->init_sec_buf, rep_src->init_sec_buf, rep_src->init_sec_data_len);
1942 rep_dest->init_sec_buf_size = rep_src->init_sec_buf_size;
1943 rep_dest->init_sec_data_len = rep_src->init_sec_data_len;
1944 rep_dest->cur_timestamp = rep_src->cur_timestamp;
1948 static int dash_read_header(AVFormatContext *s)
1950 DASHContext *c = s->priv_data;
1952 int stream_index = 0;
1955 c->interrupt_callback = &s->interrupt_callback;
1957 if ((ret = save_avio_options(s)) < 0)
1960 av_dict_set(&c->avio_opts, "seekable", "0", 0);
1962 if ((ret = parse_manifest(s, s->url, s->pb)) < 0)
1965 /* If this isn't a live stream, fill the total duration of the
1968 s->duration = (int64_t) c->media_presentation_duration * AV_TIME_BASE;
1972 c->is_init_section_common_video = is_common_init_section_exist(c->videos, c->n_videos);
1974 /* Open the demuxer for video and audio components if available */
1975 for (i = 0; i < c->n_videos; i++) {
1976 struct representation *cur_video = c->videos[i];
1977 if (i > 0 && c->is_init_section_common_video) {
1978 copy_init_section(cur_video,c->videos[0]);
1980 ret = open_demux_for_component(s, cur_video);
1984 cur_video->stream_index = stream_index;
1989 c->is_init_section_common_audio = is_common_init_section_exist(c->audios, c->n_audios);
1991 for (i = 0; i < c->n_audios; i++) {
1992 struct representation *cur_audio = c->audios[i];
1993 if (i > 0 && c->is_init_section_common_audio) {
1994 copy_init_section(cur_audio,c->audios[0]);
1996 ret = open_demux_for_component(s, cur_audio);
2000 cur_audio->stream_index = stream_index;
2004 if (!stream_index) {
2005 ret = AVERROR_INVALIDDATA;
2009 /* Create a program */
2012 program = av_new_program(s, 0);
2017 for (i = 0; i < c->n_videos; i++) {
2018 struct representation *pls = c->videos[i];
2020 av_program_add_stream_index(s, 0, pls->stream_index);
2021 pls->assoc_stream = s->streams[pls->stream_index];
2022 if (pls->bandwidth > 0)
2023 av_dict_set_int(&pls->assoc_stream->metadata, "variant_bitrate", pls->bandwidth, 0);
2025 av_dict_set(&pls->assoc_stream->metadata, "id", pls->id, 0);
2027 for (i = 0; i < c->n_audios; i++) {
2028 struct representation *pls = c->audios[i];
2030 av_program_add_stream_index(s, 0, pls->stream_index);
2031 pls->assoc_stream = s->streams[pls->stream_index];
2032 if (pls->bandwidth > 0)
2033 av_dict_set_int(&pls->assoc_stream->metadata, "variant_bitrate", pls->bandwidth, 0);
2035 av_dict_set(&pls->assoc_stream->metadata, "id", pls->id, 0);
2044 static void recheck_discard_flags(AVFormatContext *s, struct representation **p, int n)
2048 for (i = 0; i < n; i++) {
2049 struct representation *pls = p[i];
2051 int needed = !pls->assoc_stream || pls->assoc_stream->discard < AVDISCARD_ALL;
2052 if (needed && !pls->ctx) {
2053 pls->cur_seg_offset = 0;
2054 pls->init_sec_buf_read_offset = 0;
2056 for (j = 0; j < n; j++) {
2057 pls->cur_seq_no = FFMAX(pls->cur_seq_no, p[j]->cur_seq_no);
2059 reopen_demux_for_component(s, pls);
2060 av_log(s, AV_LOG_INFO, "Now receiving stream_index %d\n", pls->stream_index);
2061 } else if (!needed && pls->ctx) {
2062 close_demux_for_component(pls);
2064 ff_format_io_close(pls->parent, &pls->input);
2065 av_log(s, AV_LOG_INFO, "No longer receiving stream_index %d\n", pls->stream_index);
2070 static int dash_read_packet(AVFormatContext *s, AVPacket *pkt)
2072 DASHContext *c = s->priv_data;
2075 struct representation *cur = NULL;
2077 recheck_discard_flags(s, c->videos, c->n_videos);
2078 recheck_discard_flags(s, c->audios, c->n_audios);
2080 for (i = 0; i < c->n_videos; i++) {
2081 struct representation *pls = c->videos[i];
2084 if (!cur || pls->cur_timestamp < mints) {
2086 mints = pls->cur_timestamp;
2089 for (i = 0; i < c->n_audios; i++) {
2090 struct representation *pls = c->audios[i];
2093 if (!cur || pls->cur_timestamp < mints) {
2095 mints = pls->cur_timestamp;
2100 return AVERROR_INVALIDDATA;
2102 while (!ff_check_interrupt(c->interrupt_callback) && !ret) {
2103 ret = av_read_frame(cur->ctx, pkt);
2105 /* If we got a packet, return it */
2106 cur->cur_timestamp = av_rescale(pkt->pts, (int64_t)cur->ctx->streams[0]->time_base.num * 90000, cur->ctx->streams[0]->time_base.den);
2107 pkt->stream_index = cur->stream_index;
2110 if (cur->is_restart_needed) {
2111 cur->cur_seg_offset = 0;
2112 cur->init_sec_buf_read_offset = 0;
2114 ff_format_io_close(cur->parent, &cur->input);
2115 ret = reopen_demux_for_component(s, cur);
2116 cur->is_restart_needed = 0;
2122 static int dash_close(AVFormatContext *s)
2124 DASHContext *c = s->priv_data;
2128 av_dict_free(&c->avio_opts);
2129 av_freep(&c->base_url);
2133 static int dash_seek(AVFormatContext *s, struct representation *pls, int64_t seek_pos_msec, int flags, int dry_run)
2138 int64_t duration = 0;
2140 av_log(pls->parent, AV_LOG_VERBOSE, "DASH seek pos[%"PRId64"ms], playlist %d%s\n",
2141 seek_pos_msec, pls->rep_idx, dry_run ? " (dry)" : "");
2143 // single fragment mode
2144 if (pls->n_fragments == 1) {
2145 pls->cur_timestamp = 0;
2146 pls->cur_seg_offset = 0;
2149 ff_read_frame_flush(pls->ctx);
2150 return av_seek_frame(pls->ctx, -1, seek_pos_msec * 1000, flags);
2154 ff_format_io_close(pls->parent, &pls->input);
2156 // find the nearest fragment
2157 if (pls->n_timelines > 0 && pls->fragment_timescale > 0) {
2158 int64_t num = pls->first_seq_no;
2159 av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with SegmentTimeline start n_timelines[%d] "
2160 "last_seq_no[%"PRId64"], playlist %d.\n",
2161 (int)pls->n_timelines, (int64_t)pls->last_seq_no, (int)pls->rep_idx);
2162 for (i = 0; i < pls->n_timelines; i++) {
2163 if (pls->timelines[i]->starttime > 0) {
2164 duration = pls->timelines[i]->starttime;
2166 duration += pls->timelines[i]->duration;
2167 if (seek_pos_msec < ((duration * 1000) / pls->fragment_timescale)) {
2170 for (j = 0; j < pls->timelines[i]->repeat; j++) {
2171 duration += pls->timelines[i]->duration;
2173 if (seek_pos_msec < ((duration * 1000) / pls->fragment_timescale)) {
2181 pls->cur_seq_no = num > pls->last_seq_no ? pls->last_seq_no : num;
2182 av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with SegmentTimeline end cur_seq_no[%"PRId64"], playlist %d.\n",
2183 (int64_t)pls->cur_seq_no, (int)pls->rep_idx);
2184 } else if (pls->fragment_duration > 0) {
2185 pls->cur_seq_no = pls->first_seq_no + ((seek_pos_msec * pls->fragment_timescale) / pls->fragment_duration) / 1000;
2187 av_log(pls->parent, AV_LOG_ERROR, "dash_seek missing timeline or fragment_duration\n");
2188 pls->cur_seq_no = pls->first_seq_no;
2190 pls->cur_timestamp = 0;
2191 pls->cur_seg_offset = 0;
2192 pls->init_sec_buf_read_offset = 0;
2193 ret = dry_run ? 0 : reopen_demux_for_component(s, pls);
2198 static int dash_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
2201 DASHContext *c = s->priv_data;
2202 int64_t seek_pos_msec = av_rescale_rnd(timestamp, 1000,
2203 s->streams[stream_index]->time_base.den,
2204 flags & AVSEEK_FLAG_BACKWARD ?
2205 AV_ROUND_DOWN : AV_ROUND_UP);
2206 if ((flags & AVSEEK_FLAG_BYTE) || c->is_live)
2207 return AVERROR(ENOSYS);
2209 /* Seek in discarded streams with dry_run=1 to avoid reopening them */
2210 for (i = 0; i < c->n_videos; i++) {
2212 ret = dash_seek(s, c->videos[i], seek_pos_msec, flags, !c->videos[i]->ctx);
2214 for (i = 0; i < c->n_audios; i++) {
2216 ret = dash_seek(s, c->audios[i], seek_pos_msec, flags, !c->audios[i]->ctx);
2222 static int dash_probe(AVProbeData *p)
2224 if (!av_stristr(p->buf, "<MPD"))
2227 if (av_stristr(p->buf, "dash:profile:isoff-on-demand:2011") ||
2228 av_stristr(p->buf, "dash:profile:isoff-live:2011") ||
2229 av_stristr(p->buf, "dash:profile:isoff-live:2012") ||
2230 av_stristr(p->buf, "dash:profile:isoff-main:2011")) {
2231 return AVPROBE_SCORE_MAX;
2233 if (av_stristr(p->buf, "dash:profile")) {
2234 return AVPROBE_SCORE_MAX;
2240 #define OFFSET(x) offsetof(DASHContext, x)
2241 #define FLAGS AV_OPT_FLAG_DECODING_PARAM
2242 static const AVOption dash_options[] = {
2243 {"allowed_extensions", "List of file extensions that dash is allowed to access",
2244 OFFSET(allowed_extensions), AV_OPT_TYPE_STRING,
2245 {.str = "aac,m4a,m4s,m4v,mov,mp4"},
2246 INT_MIN, INT_MAX, FLAGS},
2250 static const AVClass dash_class = {
2251 .class_name = "dash",
2252 .item_name = av_default_item_name,
2253 .option = dash_options,
2254 .version = LIBAVUTIL_VERSION_INT,
2257 AVInputFormat ff_dash_demuxer = {
2259 .long_name = NULL_IF_CONFIG_SMALL("Dynamic Adaptive Streaming over HTTP"),
2260 .priv_class = &dash_class,
2261 .priv_data_size = sizeof(DASHContext),
2262 .read_probe = dash_probe,
2263 .read_header = dash_read_header,
2264 .read_packet = dash_read_packet,
2265 .read_close = dash_close,
2266 .read_seek = dash_read_seek,
2267 .flags = AVFMT_NO_BYTE_SEEK,