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dashdemux: inherited segment URLs are ignored if they are defined again in a lower SegmentList

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According to the standard:
"SegmentBase, SegmentTemplate and SegmentList shall inherit
attributes and elements from the same element on a higher level.
If the same attribute or element is present on both levels,
the one on the lower level shall take precedence over the one
on the higher level."

gst_mpdparser_parse_segment_list_node will now discard any inherited
segment URLs if the parsed element defines some too.

https://bugzilla.gnome.org/show_bug.cgi?id=751832
This commit is contained in:
Florin Apostol 2015-10-30 14:31:21 +00:00 committed by Vincent Penquerc'h
parent 77f4776acb
commit 013655d886
2 changed files with 24 additions and 26 deletions
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19
ext/dash/gstmpdparser.c
View file

@ -1570,6 +1570,7 @@ gst_mpdparser_parse_segment_list_node (GstSegmentListNode ** pointer,
xmlNode *cur_node;
GstSegmentListNode *new_segment_list;
gchar *actuate;
gboolean segment_urls_inherited_from_parent = FALSE;
gst_mpdparser_free_segment_list_node (*pointer);
new_segment_list = g_slice_new0 (GstSegmentListNode);
@ -1584,6 +1585,7 @@ gst_mpdparser_parse_segment_list_node (GstSegmentListNode ** pointer,
new_segment_list->SegmentURL =
g_list_append (new_segment_list->SegmentURL,
gst_mpdparser_clone_segment_url (seg_url));
segment_urls_inherited_from_parent = TRUE;
}
}
@ -1607,6 +1609,23 @@ gst_mpdparser_parse_segment_list_node (GstSegmentListNode ** pointer,
for (cur_node = a_node->children; cur_node; cur_node = cur_node->next) {
if (cur_node->type == XML_ELEMENT_NODE) {
if (xmlStrcmp (cur_node->name, (xmlChar *) "SegmentURL") == 0) {
if (segment_urls_inherited_from_parent) {
/*
* SegmentBase, SegmentTemplate and SegmentList shall inherit
* attributes and elements from the same element on a higher level.
* If the same attribute or element is present on both levels,
* the one on the lower level shall take precedence over the one
* on the higher level.
*/
/* Clear the list of inherited segment URLs */
g_list_free_full (new_segment_list->SegmentURL,
(GDestroyNotify) gst_mpdparser_free_segment_url_node);
new_segment_list->SegmentURL = NULL;
/* mark the fact that we cleared the list, so that it is not tried again */
segment_urls_inherited_from_parent = FALSE;
}
gst_mpdparser_parse_segment_url_node (&new_segment_list->SegmentURL,
cur_node);
}

31
tests/check/elements/dash_mpd.c
View file

@ -4163,36 +4163,11 @@ GST_START_TEST (dash_mpdparser_inherited_segmentURL)
expectedDuration = duration_to_ms (0, 0, 0, 0, 0, 110, 0);
expectedTimestamp = duration_to_ms (0, 0, 0, 0, 0, 0, 0);
/* the representation contains 2 segments
* - one inherited from AdaptationSet (duration 100)
* - the second defined in the Representation (duration 110)
*
* Both will have the duration specified in the Representation (110)
*/
/* the representation contains 1 segment (the one from Representation) */
/* check first segment */
ret = gst_mpd_client_get_next_fragment (mpdclient, 0, &fragment);
assert_equals_int (ret, TRUE);
assert_equals_string (fragment.uri, "/TestMediaAdaptation");
assert_equals_int64 (fragment.range_start, 10);
assert_equals_int64 (fragment.range_end, 20);
assert_equals_string (fragment.index_uri, "/TestIndexAdaptation");
assert_equals_int64 (fragment.index_range_start, 30);
assert_equals_int64 (fragment.index_range_end, 40);
assert_equals_uint64 (fragment.duration, expectedDuration * GST_MSECOND);
assert_equals_uint64 (fragment.timestamp, expectedTimestamp * GST_MSECOND);
gst_media_fragment_info_clear (&fragment);
/* advance to next segment */
flow = gst_mpd_client_advance_segment (mpdclient, activeStream, TRUE);
assert_equals_int (flow, GST_FLOW_OK);
/* second segment starts after first ends */
expectedTimestamp = expectedTimestamp + expectedDuration;
/* check second segment */
ret = gst_mpd_client_get_next_fragment (mpdclient, 0, &fragment);
assert_equals_int (ret, TRUE);
assert_equals_string (fragment.uri, "/TestMediaRep");
assert_equals_int64 (fragment.range_start, 100);
assert_equals_int64 (fragment.range_end, 200);
@ -4203,6 +4178,10 @@ GST_START_TEST (dash_mpdparser_inherited_segmentURL)
assert_equals_uint64 (fragment.timestamp, expectedTimestamp * GST_MSECOND);
gst_media_fragment_info_clear (&fragment);
/* try to advance to next segment. Should fail */
flow = gst_mpd_client_advance_segment (mpdclient, activeStream, TRUE);
assert_equals_int (flow, GST_FLOW_EOS);
gst_mpd_client_free (mpdclient);
}