ControlSource

Object Hierarchy:

Description:

[ CCode ( type_id = "gst_control_source_get_type ()" ) ]
public abstract class ControlSource : Object

The ControlSource is a base class for control value sources that could be used to get timestamp-value pairs.

A control source essentially is a function over time.

A ControlSource is used by first getting an instance of a specific control-source, creating a binding for the control-source to the target property of the element and then adding the binding to the element. The binding will convert the data types and value range to fit to the bound property.

For implementing a new ControlSource one has to implement ControlSourceGetValue and ControlSourceGetValueArray functions. These are then used by get_value and get_value_array to get values for specific timestamps.

Namespace: Gst

Package: gstreamer-1.0

Content:

Creation methods:

protected ControlSource ()

Methods:

public bool get_value (ClockTime timestamp, out double value)
Gets the value for this ControlSource at a given timestamp.
public bool get_value_array (ClockTime timestamp, ClockTime interval, double[] values)
Gets an array of values for for this ControlSource.

Fields:

public unowned ControlSourceGetValueArray get_value_array_func
public unowned ControlSourceGetValue get_value_func

Inherited Members:

All known members inherited from class Gst.Object

All known members inherited from class GLib.Object