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ges/ges-simple-timeline-layer.c: implement simple stair-step like priority

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management scheme.
This commit is contained in:
Brandon Lewis 2010-05-27 23:36:10 +02:00 committed by Edward Hervey
parent 3118c0f510
commit e5ae1405c8
1 changed files with 40 additions and 2 deletions
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42
ges/ges-simple-timeline-layer.c
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@ -29,6 +29,8 @@
#include "ges-internal.h"
#include "ges-simple-timeline-layer.h"
#include "ges-timeline-object.h"
#include "ges-timeline-source.h"
#include "ges-timeline-transition.h"
static void
ges_simple_timeline_layer_object_removed (GESTimelineLayer * layer,
@ -100,17 +102,53 @@ gstl_recalculate (GESSimpleTimelineLayer * self)
{
GList *tmp;
GstClockTime pos = 0;
gint priority = GES_TIMELINE_LAYER (self)->min_gnl_priority;
GESTimelineObject *prev_object = NULL;
GST_DEBUG ("recalculating values");
for (tmp = self->objects; tmp; tmp = tmp->next) {
GESTimelineObject *obj = (GESTimelineObject *) tmp->data;
GST_DEBUG ("%p, %ld", obj, pos);
if (GES_IS_TIMELINE_SOURCE (obj)) {
GST_DEBUG ("%p is a source\n", obj);
priority++;
if (G_UNLIKELY (GES_TIMELINE_OBJECT_START (obj) != pos)) {
ges_timeline_object_set_start (obj, pos);
}
if (G_UNLIKELY (GES_TIMELINE_OBJECT_PRIORITY (obj) != priority)) {
ges_timeline_object_set_priority (obj, priority);
}
pos += GES_TIMELINE_OBJECT_DURATION (obj);
} else if (GES_IS_TIMELINE_TRANSITION (obj)) {
GST_DEBUG ("%p is transition\n", obj);
if (GES_IS_TIMELINE_TRANSITION (prev_object)) {
GST_ERROR ("two transitions in sequence!");
}
if (GES_IS_TIMELINE_SOURCE (prev_object)) {
pos -= GES_TIMELINE_OBJECT_DURATION (obj);
}
if (G_UNLIKELY (GES_TIMELINE_OBJECT_PRIORITY (obj) != priority)) {
ges_timeline_object_set_priority (obj, priority - 1);
}
if (G_UNLIKELY (GES_TIMELINE_OBJECT_START (obj) != pos)) {
ges_timeline_object_set_start (obj, pos);
}
pos += GES_TIMELINE_OBJECT_DURATION (obj);
GST_DEBUG (", %ld\n", pos);
prev_object = obj;
}
GES_TIMELINE_LAYER (self)->max_gnl_priority = priority;
}
/**