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The QMediaService class provides a common base class for media service implementations. More...
#include <QMediaService>
This class is under development and is subject to change.
Inherits QObject.
enum | MediaEndpoint { AudioDevice } |
~QMediaService () | |
virtual QString | activeEndpoint ( QMediaService::MediaEndpoint endpointType ) |
virtual QMediaControl * | control ( const char * interface ) const = 0 |
T | control () const |
virtual QString | endpointDescription ( QMediaService::MediaEndpoint endpointType, const QString & endpoint ) |
bool | isEndpointSupported ( QMediaService::MediaEndpoint endpointType ) |
virtual bool | setActiveEndpoint ( QMediaService::MediaEndpoint endpointType, const QString & endpoint ) |
virtual QStringList | supportedEndpoints ( QMediaService::MediaEndpoint endpointType ) const |
void | activeEndpointChanged ( QMediaService::MediaEndpoint endpointType, const QString & endpoint ) |
void | supportedEndpointsChanged () |
QMediaService ( QObject * parent ) |
The QMediaService class provides a common base class for media service implementations.
Media services provide implementations of the functionality promised by media objects, and allow multiple providers to implement a QMediaObject.
To provide the functionality of a QMediaObject media services implement QMediaControl interfaces. Services typically implement one core media control which provides the core feature of a media object, and some number of additional controls which provide either optional features of the media object, or features of a secondary media object or peripheral object.
A pointer to media service's QMediaControl implementation can be obtained by passing the control's interface name to the control() function.
QMediaPlayerControl *control = qobject_cast<QMediaPlayerControl *>( service->control("com.nokia.Qt.QMediaPlayerControl/1.0"));
Media objects can use services loaded dynamically from plug-ins or implemented statically within an applications. Plug-in based services should also implement the QMediaServiceProviderPlugin interface. Static services should implement the QMediaServiceProvider interface.
See also QMediaObject, QMediaControl, QMediaServiceProvider, and QMediaServiceProviderPlugin.
Enumerates the possible end points a media service may have.
Constant | Value | Description |
---|---|---|
QMediaService::AudioDevice | 0 | An audio device for either input or output. |
Construct a media service with the given parent. This class is meant as a base class for Multimedia services so this constructor is protected.
Destroys a media service.
Returns the active endpoint for endpointType.
See also setActiveEndpoint().
This signal emitted when the active endpoint of type endpointType has been changed to endpoint.
Returns a pointer to the media control implementing interface.
If the service does not implement the control a null pointer is returned instead.
Returns a pointer to the media control of type T implemented by a media service.
If the service does not implment the control a null pointer is returned instead.
Returns the description of the endpoint for the endpointType.
Return true if endpointType is available.
Returns true if set of the active endpoint for endpointType to endpoint succeeds.
See also activeEndpoint().
Returns a list of endpoints available for the endpointType.
This signal is emitted when there is a change in the availability of devices.
Copyright © 2009 Nokia Corporation and/or its subsidiary(-ies) | Trademarks | Qt Mobility Project 1.0.0 (Technology Preview) |