Trait gstreamer::prelude::DeviceExt[−][src]

pub trait DeviceExt: 'static {
    fn create_element(&self, name: Option<&str>) -> Result<Element, BoolError>;

    fn caps(&self) -> Option<Caps>;

    fn device_class(&self) -> GString;

    fn display_name(&self) -> GString;

    fn properties(&self) -> Option<Structure>;

    fn has_classes(&self, classes: &str) -> bool;

    fn has_classesv(&self, classes: &[&str]) -> bool;

    fn reconfigure_element<P: IsA<Element>>(
        &self, 
        element: &P
    ) -> Result<(), BoolError>;

    fn connect_removed<F: Fn(&Self) + Send + Sync + 'static>(
        &self, 
        f: F
    ) -> SignalHandlerId;
}
Expand description

Trait containing all Device methods.

Implementors

Device

Required methods

Creates the element with all of the required parameters set to use this device.

name

name of new element, or None to automatically create a unique name.

Returns

a new Element configured to use this device

Getter for the Caps that this device supports.

Returns

The Caps supported by this device. Unref with gst_caps_unref() when done.

Gets the “class” of a device. This is a “/” separated list of classes that represent this device. They are a subset of the classes of the DeviceProvider that produced this device.

Returns

The device class. Free with g_free() after use.

Gets the user-friendly name of the device.

Returns

The device name. Free with g_free() after use.

Gets the extra properties of a device.

Returns

The extra properties or None when there are none. Free with gst_structure_free() after use.

Check if self matches all of the given classes

classes

a “/”-separated list of device classes to match, only match if all classes are matched

Returns

true if self matches.

Check if factory matches all of the given classes

classes

a None terminated array of classes to match, only match if all classes are matched

Returns

true if self matches.

Tries to reconfigure an existing element to use the device. If this function fails, then one must destroy the element and create a new one using create_element().

Note: This should only be implemented for elements can change their device in the PLAYING state.

element

a Element

Returns

true if the element could be reconfigured to use this device, false otherwise.

Implementors