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avformat/dashdec: Support signaling of last segment number 

Last segment indicated by mpd is not parsed.
Example stream: http://dash.akamaized.net/dash264/TestCasesIOP41/LastSegmentNumber/1/manifest_last_segment_num.mpd

This patch supports parsing of Supplemental Descriptor with @schemeIdUri set to http://dashif.org/guide-
lines/last-segment-number with the @value set to the last segment number.

Reviewed-by: Steven Liu <lq@onvideo.cn>
This commit is contained in:
sanilraut 2018-03-28 19:52:27 +08:00 committed by Steven Liu
parent 44000b7744
commit 10d008f0fd
1 changed files with 23 additions and 3 deletions
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26
libavformat/dashdec.c
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@ -805,7 +805,8 @@ static int parse_manifest_representation(AVFormatContext *s, const char *url,
xmlNodePtr fragment_template_node,
xmlNodePtr content_component_node,
xmlNodePtr adaptionset_baseurl_node,
xmlNodePtr adaptionset_segmentlist_node)
xmlNodePtr adaptionset_segmentlist_node,
xmlNodePtr adaptionset_supplementalproperty_node)
{
int32_t ret = 0;
int32_t audio_rep_idx = 0;
@ -825,6 +826,7 @@ static int parse_manifest_representation(AVFormatContext *s, const char *url,
char *timescale_val = NULL;
char *initialization_val = NULL;
char *media_val = NULL;
char *val = NULL;
xmlNodePtr baseurl_nodes[4];
xmlNodePtr representation_node = node;
char *rep_id_val = xmlGetProp(representation_node, "id");
@ -920,6 +922,17 @@ static int parse_manifest_representation(AVFormatContext *s, const char *url,
rep->first_seq_no = (int64_t) strtoll(startnumber_val, NULL, 10);
xmlFree(startnumber_val);
}
if (adaptionset_supplementalproperty_node) {
if (!av_strcasecmp(xmlGetProp(adaptionset_supplementalproperty_node,"schemeIdUri"), "http://dashif.org/guidelines/last-segment-number")) {
val = xmlGetProp(adaptionset_supplementalproperty_node,"value");
if (!val) {
av_log(s, AV_LOG_ERROR, "Missing value attribute in adaptionset_supplementalproperty_node\n");
} else {
rep->last_seq_no =(int64_t) strtoll(val, NULL, 10) - 1;
xmlFree(val);
}
}
}
fragment_timeline_node = find_child_node_by_name(representation_segmenttemplate_node, "SegmentTimeline");
@ -1054,6 +1067,7 @@ static int parse_manifest_adaptationset(AVFormatContext *s, const char *url,
xmlNodePtr content_component_node = NULL;
xmlNodePtr adaptionset_baseurl_node = NULL;
xmlNodePtr adaptionset_segmentlist_node = NULL;
xmlNodePtr adaptionset_supplementalproperty_node = NULL;
xmlNodePtr node = NULL;
node = xmlFirstElementChild(adaptionset_node);
@ -1066,6 +1080,8 @@ static int parse_manifest_adaptationset(AVFormatContext *s, const char *url,
adaptionset_baseurl_node = node;
} else if (!av_strcasecmp(node->name, (const char *)"SegmentList")) {
adaptionset_segmentlist_node = node;
} else if (!av_strcasecmp(node->name, (const char *)"SupplementalProperty")) {
adaptionset_supplementalproperty_node = node;
} else if (!av_strcasecmp(node->name, (const char *)"Representation")) {
ret = parse_manifest_representation(s, url, node,
adaptionset_node,
@ -1076,7 +1092,8 @@ static int parse_manifest_adaptationset(AVFormatContext *s, const char *url,
fragment_template_node,
content_component_node,
adaptionset_baseurl_node,
adaptionset_segmentlist_node);
adaptionset_segmentlist_node,
adaptionset_supplementalproperty_node);
if (ret < 0) {
return ret;
}
@ -1819,7 +1836,10 @@ static int open_demux_for_component(AVFormatContext *s, struct representation *p
pls->parent = s;
pls->cur_seq_no = calc_cur_seg_no(s, pls);
pls->last_seq_no = calc_max_seg_no(pls, s->priv_data);
if (!pls->last_seq_no) {
pls->last_seq_no = calc_max_seg_no(pls, s->priv_data);
}
ret = reopen_demux_for_component(s, pls);
if (ret < 0) {