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    GObject
    ╰── GInitiallyUnowned
        ╰── GstObject
            ╰── GstControlSource
                ╰── GstTimedValueControlSource
                    ╰── GstTriggerControlSource
GstTriggerControlSource is a GstControlSource, that returns values from user-given control points. It allows for a tolerance on the time-stamps.
To use GstTriggerControlSource get a new instance by calling
gst_trigger_control_source_new(), bind it to a GParamSpec and set some
control points by calling gst_timed_value_control_source_set().
All functions are MT-safe.
GstControlSource *
gst_trigger_control_source_new (void);
This returns a new, unbound GstTriggerControlSource.