The QMediaService class provides a common base class for media service implementations. More...
#include <QMediaService>Inherits: QObject.
This class was introduced in Qt Mobility 1.0.
| ~QMediaService () | |
| virtual void | releaseControl ( QMediaControl * control ) = 0 |
| virtual QMediaControl * | requestControl ( const char * interface ) = 0 |
| T | requestControl () |
| 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 requestControl() function.
QMediaPlayerControl *control = qobject_cast<QMediaPlayerControl *>( mediaService->requestControl("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.
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.
Releases a control back to the service.
This function was introduced in Qt Mobility 1.0.
Returns a pointer to the media control implementing interface.
If the service does not implement the control, or if it is unavailable a null pointer is returned instead.
Controls must be returned to the service when no longer needed using the releaseControl() function.
This function was introduced in Qt Mobility 1.0.
Returns a pointer to the media control of type T implemented by a media service.
If the service does not implement the control, or if it is unavailable a null pointer is returned instead.
Controls must be returned to the service when no longer needed using the releaseControl() function.
This function was introduced in Qt Mobility 1.0.