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timelineelement: Make sure that we will never set a negative start

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Currently we can end up overflowing the start of others child of our
parent, avoid that making sure we can set our start to what was
requested by the user before actually doing it

+ Add a test
This commit is contained in:
Thibault Saunier 2013-07-10 23:15:17 -04:00
parent b0202ed22b
commit 1e5bb2edf6
2 changed files with 16 additions and 0 deletions
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12
ges/ges-timeline-element.c
View file

@ -378,6 +378,7 @@ void
ges_timeline_element_set_start (GESTimelineElement * self, GstClockTime start)
{
GESTimelineElementClass *klass;
GESTimelineElement *toplevel_container;
g_return_if_fail (GES_IS_TIMELINE_ELEMENT (self));
@ -387,6 +388,17 @@ ges_timeline_element_set_start (GESTimelineElement * self, GstClockTime start)
" new start: %" GST_TIME_FORMAT,
GST_TIME_ARGS (GES_TIMELINE_ELEMENT_START (self)), GST_TIME_ARGS (start));
toplevel_container = ges_timeline_element_get_toplevel_parent (self);
if (((gint64) (_START (toplevel_container) + start - _START (self))) < 0) {
GST_INFO_OBJECT (self, "Can not move the object as it would imply its"
"container to have a negative start value");
gst_object_unref (toplevel_container);
return;
}
gst_object_unref (toplevel_container);
if (klass->set_start) {
if (klass->set_start (self, start)) {
self->start = start;

4
tests/check/ges/group.c
View file

@ -69,6 +69,10 @@ GST_START_TEST (test_move_group)
ASSERT_OBJECT_REFCOUNT (group, "1 ref for the timeline", 1);
fail_unless (g_list_length (GES_CONTAINER_CHILDREN (group)) == 3);
assert_equals_int (GES_CONTAINER_HEIGHT (group), 2);
/* Nothing should move */
ges_timeline_element_set_start (GES_TIMELINE_ELEMENT (clip1), 5);
CHECK_OBJECT_PROPS (clip, 0, 0, 10);
CHECK_OBJECT_PROPS (clip1, 10, 0, 10);
CHECK_OBJECT_PROPS (clip2, 50, 0, 60);