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timeline-element: make start and duration EXPLICIT_NOTIFY

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The properties will only have their signal emitted when they change in
value, even when g_object_set, etc, methods are used.

The _set_start method already did this, but start was missing the
EXPLICIT_NOTIFY flag. There should be no need to check that the property
has changed in ->set_start or ->set_duration
This commit is contained in:
Henry Wilkes 2020-03-10 16:01:02 +00:00
parent 658e64432d
commit eb8e429c80
3 changed files with 31 additions and 16 deletions
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17
ges/ges-timeline-element.c
View file

@ -409,7 +409,8 @@ ges_timeline_element_class_init (GESTimelineElementClass * klass)
* to any source content.
*/
properties[PROP_START] = g_param_spec_uint64 ("start", "Start",
"The position in the timeline", 0, G_MAXUINT64, 0, G_PARAM_READWRITE);
"The position in the timeline", 0, G_MAXUINT64, 0,
G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY);
/**
* GESTimelineElement:in-point:
@ -444,7 +445,8 @@ ges_timeline_element_class_init (GESTimelineElementClass * klass)
*/
properties[PROP_DURATION] =
g_param_spec_uint64 ("duration", "Duration", "The play duration", 0,
G_MAXUINT64, GST_CLOCK_TIME_NONE, G_PARAM_READWRITE);
G_MAXUINT64, GST_CLOCK_TIME_NONE,
G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY);
/**
* GESTimelineElement:max-duration:
@ -1081,6 +1083,8 @@ ges_timeline_element_set_start (GESTimelineElement * self, GstClockTime start)
klass = GES_TIMELINE_ELEMENT_GET_CLASS (self);
if (klass->set_start) {
gint res = klass->set_start (self, start);
if (res == FALSE)
return FALSE;
if (res == TRUE && emit_notify) {
self->start = start;
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_START]);
@ -1089,7 +1093,7 @@ ges_timeline_element_set_start (GESTimelineElement * self, GstClockTime start)
GST_DEBUG_OBJECT (self, "New start: %" GST_TIME_FORMAT,
GST_TIME_ARGS (GES_TIMELINE_ELEMENT_START (self)));
return ! !res;
return TRUE;
}
GST_WARNING_OBJECT (self, "No set_start virtual method implementation"
@ -1236,6 +1240,9 @@ ges_timeline_element_set_duration (GESTimelineElement * self,
g_return_val_if_fail (GES_IS_TIMELINE_ELEMENT (self), FALSE);
if (duration == self->duration)
return TRUE;
toplevel = ges_timeline_element_get_toplevel_parent (self);
if (self->timeline &&
!ELEMENT_FLAG_IS_SET (self, GES_TIMELINE_ELEMENT_SET_SIMPLE) &&
@ -1264,12 +1271,14 @@ ges_timeline_element_set_duration (GESTimelineElement * self,
klass = GES_TIMELINE_ELEMENT_GET_CLASS (self);
if (klass->set_duration) {
gint res = klass->set_duration (self, duration);
if (res == FALSE)
return FALSE;
if (res == TRUE && emit_notify) {
self->duration = duration;
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_DURATION]);
}
return ! !res;
return TRUE;
}
GST_WARNING_OBJECT (self, "No set_duration virtual method implementation"

24
ges/ges-timeline-element.h
View file

@ -168,12 +168,24 @@ struct _GESTimelineElement
* @set_parent: Method called just before the #GESTimelineElement:parent
* is set.
* @set_start: Method called just before the #GESTimelineElement:start is
* set. A return of -1 means that the subclass handled emitting the notify
* signal and the base class should return %TRUE.
* @set_duration: Method called just before the
* #GESTimelineElement:duration is set. A return of -1 means that the
* subclass handled emitting the notify signal and the base class should
* return %TRUE.
* set. This method should check whether the #GESTimelineElement:start can
* be changed to the new value and to otherwise prepare the element in
* response to what the new value will be. A return of %FALSE means that
* the property should not be set. A return of %TRUE means that the
* property should be set to the value given to the setter and a notify
* emitted. A return of -1 means that the property should not be set but
* the setter should still return %TRUE (normally because the method
* already handled setting the value, potentially to a snapped value, and
* emitted the notify signal).
* #GESTimelineElement:duration is set. This method should check
* whether the #GESTimelineElement:duration can be changed to the new
* value and to otherwise prepare the element in response to what the new
* value will be. A return of %FALSE means that the property should not be
* set. A return of %TRUE means that the property should be set to the
* value given to the setter and a notify emitted. A return of -1 means
* that the property should not be set but the setter should still return
* %TRUE (normally because the method already handled setting the value,
* potentially to a snapped value, and emitted the notify signal).
* @set_inpoint: Method called just before the
* #GESTimelineElement:in-point is set to a new value. This method should
* not set the #GESTimelineElement:in-point itself, but should check

6
ges/ges-track-element.c
View file

@ -580,9 +580,6 @@ _set_start (GESTimelineElement * element, GstClockTime start)
g_return_val_if_fail (object->priv->nleobject, FALSE);
if (G_UNLIKELY (start == _START (object)))
return -1;
g_object_set (object->priv->nleobject, "start", start, NULL);
return TRUE;
@ -628,9 +625,6 @@ _set_duration (GESTimelineElement * element, GstClockTime duration)
duration > _INPOINT (object) + _MAXDURATION (element))
duration = _MAXDURATION (element) - _INPOINT (object);
if (G_UNLIKELY (duration == _DURATION (object)))
return -1;
g_object_set (priv->nleobject, "duration", duration, NULL);
_update_control_bindings (element, ges_timeline_element_get_inpoint (element),