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ges-track-transition.c: set interpolation control points properly from

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gnlobject properties
This commit is contained in:
Brandon Lewis 2010-05-25 19:07:21 +02:00 committed by Edward Hervey
parent 28f1acba81
commit 998ae5af20
1 changed files with 58 additions and 4 deletions
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62
ges/ges-track-transition.c
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@ -24,6 +24,51 @@
G_DEFINE_TYPE (GESTrackTransition, ges_track_transition, GES_TYPE_TRACK_OBJECT);
static void
ges_track_transition_update_controller (GESTrackTransition * self,
GstElement * gnlobj)
{
GST_LOG ("updating controller");
if (!gnlobj)
return;
if (!(self->controller))
return;
GST_LOG ("getting properties");
guint64 duration;
g_object_get (G_OBJECT (gnlobj), "duration", (guint64 *) & duration, NULL);
GST_INFO ("duration: %d\n", duration);
GValue start_value = { 0, };
GValue end_value = { 0, };
g_value_init (&start_value, G_TYPE_DOUBLE);
g_value_init (&end_value, G_TYPE_DOUBLE);
g_value_set_double (&start_value, 0.0);
g_value_set_double (&end_value, 1.0);
GST_LOG ("setting values on controller");
g_assert (GST_IS_CONTROLLER (self->controller));
g_assert (GST_IS_CONTROL_SOURCE (self->control_source));
gst_interpolation_control_source_unset_all (self->control_source);
gst_interpolation_control_source_set (self->control_source, 0, &start_value);
gst_interpolation_control_source_set (self->control_source,
duration, &end_value);
GST_LOG ("done updating controller");
}
static void
gnlobject_duration_cb (GstElement * gnlobject, GParamSpec * arg
G_GNUC_UNUSED, GESTrackTransition * self)
{
ges_track_transition_update_controller (self, gnlobject);
}
static void
ges_track_transition_get_property (GObject * object, guint property_id,
GValue * value, GParamSpec * pspec)
@ -85,6 +130,8 @@ ges_track_transition_create_gnl_object (GESTrackObject * object)
object->gnlobject = gst_element_factory_make ("gnloperation",
"transition-operation");
g_object_set (object->gnlobject, "priority", 0, NULL);
g_signal_connect (G_OBJECT (object->gnlobject), "notify::duration",
G_CALLBACK (gnlobject_duration_cb), object);
if ((object->track->type) == GES_TRACK_TYPE_VIDEO) {
GstElement *topbin = gst_bin_new ("transition-bin");
@ -117,17 +164,24 @@ ges_track_transition_create_gnl_object (GESTrackObject * object)
/* set up interpolation */
g_object_set (G_OBJECT (b_pad), "alpha", (gfloat) 0.0, NULL);
GstController *controller;
controller = gst_object_control_properties (G_OBJECT (b_pad), "alpha",
NULL);
GstControlSource *control_source;
control_source =
GST_CONTROL_SOURCE (gst_interpolation_control_source_new ());
gst_controller_set_control_source (controller, "alpha", control_source);
GstInterpolationControlSource *control_source;
control_source = gst_interpolation_control_source_new ();
gst_controller_set_control_source (controller,
"alpha", GST_CONTROL_SOURCE (control_source));
gst_interpolation_control_source_set_interpolation_mode (control_source,
GST_INTERPOLATE_LINEAR);
self->controller = controller;
self->control_source = control_source;
GST_LOG ("controller created, updating");
ges_track_transition_update_controller (self, object->gnlobject);
return TRUE;
}