GstDirectControlBinding

A value mapping object that attaches control sources to gobject properties. It will map the control values directly to the target property range. If a non-absolute direct control binding is used, the value range [0.0 ... 1.0] is mapped to full target property range, and all values outside the range will be clipped. An absolute control binding will not do any value transformations.

GstDirectControlBinding 

GObject
    ╰──GInitiallyUnowned
        ╰──GstObject
            ╰──GstControlBinding
                ╰──GstDirectControlBinding

The instance structure of GstDirectControlBinding.

Members

parent (GstControlBinding) –
No description available
ABI._gst_reserved (gpointer *) –
No description available
ABI.abi.want_absolute (gboolean) –
No description available

Class structure

GstDirectControlBindingClass

The class structure of GstDirectControlBinding.

Fields
parent_class (GstControlBindingClass) –

Parent class

Constructors

gst_direct_control_binding_new 

GstControlBinding *
gst_direct_control_binding_new (GstObject * object,
                                const gchar * property_name,
                                GstControlSource * cs)

Create a new control-binding that attaches the GstControlSource to the GObject property. It will map the control source range [0.0 ... 1.0] to the full target property range, and clip all values outside this range.

Parameters:

object –

the object of the property

property_name –

the property-name to attach the control source

cs –

the control source

Returns ( [transfer: floating]) –

the new GstDirectControlBinding

gst_direct_control_binding_new_absolute 

GstControlBinding *
gst_direct_control_binding_new_absolute (GstObject * object,
                                         const gchar * property_name,
                                         GstControlSource * cs)

Create a new control-binding that attaches the GstControlSource to the GObject property. It will directly map the control source values to the target property range without any transformations.

Parameters:

object –

the object of the property

property_name –

the property-name to attach the control source

cs –

the control source

Returns ( [transfer: floating]) –

the new GstDirectControlBinding

Since : 1.6

Properties

absolute 

“absolute” gboolean

Flags : Read / Write / Construct Only

control-source 

“control-source” GstControlSource *

Flags : Read / Write / Construct

Constants

GST_TYPE_DIRECT_CONTROL_BINDING 

#define GST_TYPE_DIRECT_CONTROL_BINDING \
  (gst_direct_control_binding_get_type())

Callbacks

GstDirectControlBindingConvertGValue 

(*GstDirectControlBindingConvertGValue) (GstDirectControlBinding * self,
                                         gdouble src_value,
                                         GValue * dest_value)

Function to map a control-value to the target GValue.

Parameters:

self –

the GstDirectControlBinding instance

src_value –

the value returned by the cotnrol source

dest_value –

the target GValue

GstDirectControlBindingConvertValue 

(*GstDirectControlBindingConvertValue) (GstDirectControlBinding * self,
                                        gdouble src_value,
                                        gpointer dest_value)

Function to map a control-value to the target plain data type.

Parameters:

self –

the GstDirectControlBinding instance

src_value –

the value returned by the cotnrol source

dest_value –

the target location

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