DeviceProvider

Object Hierarchy:

Description:

[ CCode ( type_id = "gst_device_provider_get_type ()" ) ]
[ Version ( since = "1.4" ) ]
public abstract class DeviceProvider : Object

A DeviceProvider subclass is provided by a plugin that handles devices if there is a way to programmatically list connected devices.

It can also optionally provide updates to the list of connected devices.

Each DeviceProvider subclass is a singleton, a plugin should normally provide a single subclass for all devices.

Applications would normally use a DeviceMonitor to monitor devices from all relevant providers.

Namespace: Gst

Package: gstreamer-1.0

Content:

Static methods:

public static bool register (Plugin? plugin, string name, uint rank, Type type)
Create a new device providerfactory capable of instantiating objects of the type and add the factory to plugin.

Creation methods:

protected DeviceProvider ()

Methods:

public class void add_metadata (string key, string value)
Set key with value as metadata in this.
public class void add_static_metadata (string key, owned string value)
Set key with value as metadata in this.
public bool can_monitor ()
public class unowned string? class_get_metadata (string key)
Get metadata with key in this .
public void device_add (Device device)
Posts a message on the provider's Bus to inform applications that a new device has been added.
public void device_changed (Device device, Device changed_device)
This function is used when changed_device was modified into its new form device.
public void device_remove (Device device)
Posts a message on the provider's Bus to inform applications that a device has been removed.
public Bus get_bus ()
Gets the Bus of this DeviceProvider
public List<Device> get_devices ()
Gets a list of devices that this provider understands.
public unowned DeviceProviderFactory? get_factory ()
Retrieves the factory that was used to create this device provider.
public string[] get_hidden_providers ()
Get the provider factory names of the DeviceProvider instances that are hidden by this.
public unowned string get_metadata (string key)
Get metadata with key in this .
public void hide_provider (string name)
Make this hide the devices from the factory with name.
public bool is_started ()
This function can be used to know if the this was successfully started.
public class void set_metadata (string longname, string classification, string description, string author)
Sets the detailed information for a DeviceProvider.
public class void set_static_metadata (owned string longname, owned string classification, owned string description, owned string author)
Sets the detailed information for a DeviceProvider.
public virtual bool start ()
Starts providering the devices.
public virtual void stop ()
Decreases the use-count by one.
public void unhide_provider (string name)
Make this unhide the devices from factory name.

Signals:

public signal void provider_hidden (string object)
public signal void provider_unhidden (string object)

Fields:

public unowned List<void*> devices

Inherited Members:

All known members inherited from class Gst.Object

All known members inherited from class GLib.Object