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Functions
Object Hierarchy
GObject ╰── GInitiallyUnowned ╰── GstObject ╰── GstControlSource ╰── GstTimedValueControlSource ├── GstInterpolationControlSource ╰── GstTriggerControlSource
Description
Base class for GstContrlSources that use time-stamped values.
When overriding bind, chain up first to give this bind implementation a chance to setup things.
All functions are MT-safe.
Functions
gst_timed_value_control_source_find_control_point_iter ()
GSequenceIter * gst_timed_value_control_source_find_control_point_iter (GstTimedValueControlSource *self,GstClockTime timestamp);
Find last value before given timestamp in control point list.
If all values in the control point list come after the given
timestamp or no values exist, NULL is returned.
For use in control source implementations.
gst_timed_value_control_source_set ()
gboolean gst_timed_value_control_source_set (GstTimedValueControlSource *self,GstClockTime timestamp,const gdouble value);
Set the value of given controller-handled property at a certain time.
Parameters
self |
the GstTimedValueControlSource object |
|
timestamp |
the time the control-change is scheduled for |
|
value |
the control-value |
gst_timed_value_control_source_set_from_list ()
gboolean gst_timed_value_control_source_set_from_list (GstTimedValueControlSource *self,const GSList *timedvalues);
Sets multiple timed values at once.
Parameters
self |
the GstTimedValueControlSource object |
|
timedvalues |
a list with GstTimedValue items. |
[transfer none][element-type GstTimedValue] |
gst_timed_value_control_source_get_all ()
GList *
gst_timed_value_control_source_get_all
(GstTimedValueControlSource *self);
Returns a read-only copy of the list of GstTimedValue for the given property. Free the list after done with it.
Returns
a copy
of the list, or NULL if the property isn't handled by the controller.
[transfer container][element-type GstTimedValue]
gst_timed_value_control_source_unset ()
gboolean gst_timed_value_control_source_unset (GstTimedValueControlSource *self,GstClockTime timestamp);
Used to remove the value of given controller-handled property at a certain time.
Parameters
self |
the GstTimedValueControlSource object |
|
timestamp |
the time the control-change should be removed from |
gst_timed_value_control_source_unset_all ()
void
gst_timed_value_control_source_unset_all
(GstTimedValueControlSource *self);
Used to remove all time-stamped values of given controller-handled property
gst_timed_value_control_source_get_count ()
gint
gst_timed_value_control_source_get_count
(GstTimedValueControlSource *self);
Get the number of control points that are set.
gst_timed_value_control_invalidate_cache ()
void
gst_timed_value_control_invalidate_cache
(GstTimedValueControlSource *self);
Reset the controlled value cache.
Types and Values
struct GstTimedValueControlSource
struct GstTimedValueControlSource;
The instance structure of GstControlSource.