The QMediaObject class provides a common base for multimedia objects. More...
#include <QMediaObject>Inherits: QObject.
Inherited by: QAudioCaptureSource, QCamera, QMediaImageViewer, QMediaPlayer, and QRadioTuner.
This class was introduced in Qt Mobility 1.0.
| ~QMediaObject () | |
| virtual QtMultimediaKit::AvailabilityError | availabilityError () const |
| QStringList | availableExtendedMetaData () const |
| QList<QtMultimediaKit::MetaData> | availableMetaData () const |
| virtual bool | bind ( QObject * object ) |
| QVariant | extendedMetaData ( const QString & key ) const |
| virtual bool | isAvailable () const |
| bool | isMetaDataAvailable () const |
| QVariant | metaData ( QtMultimediaKit::MetaData key ) const |
| int | notifyInterval () const |
| virtual QMediaService * | service () const |
| void | setNotifyInterval ( int milliSeconds ) |
| virtual void | unbind ( QObject * object ) |
| void | availabilityChanged ( bool available ) |
| void | metaDataAvailableChanged ( bool available ) |
| void | metaDataChanged () |
| void | notifyIntervalChanged ( int milliseconds ) |
| QMediaObject ( QObject * parent, QMediaService * service ) | |
| void | addPropertyWatch ( QByteArray const & name ) |
| void | removePropertyWatch ( QByteArray const & name ) |
The QMediaObject class provides a common base for multimedia objects.
QMediaObject derived classes provide access to the functionality of a QMediaService. Each media object hosts a QMediaService and uses the QMediaControl interfaces implemented by the service to implement its API. Most media objects when constructed will request a new QMediaService instance from a QMediaServiceProvider, but some like QMediaRecorder will share a service with another object.
QMediaObject itself provides an API for accessing a media service's meta-data and a means of connecting other media objects, and peripheral classes like QVideoWidget and QMediaPlaylist.
See also QMediaService and QMediaControl.
The interval at which notifiable properties will update.
The interval is expressed in milliseconds, the default value is 1000.
This property was introduced in Qt Mobility 1.0.
Access functions:
| int | notifyInterval () const |
| void | setNotifyInterval ( int milliSeconds ) |
Notifier signal:
| void | notifyIntervalChanged ( int milliseconds ) |
See also addPropertyWatch() and removePropertyWatch().
Constructs a media object which uses the functionality provided by a media service.
The parent is passed to QObject.
This class is meant as a base class for Multimedia objects so this constructor is protected.
This function was introduced in Qt Mobility 1.0.
Destroys a media object.
Watch the property name. The property's notify signal will be emitted once every notifyInterval milliseconds.
This function was introduced in Qt Mobility 1.0.
See also notifyInterval.
Signal emitted when the availability state has changed to available
This function was introduced in Qt Mobility 1.0.
Returns the service availability error state.
This function was introduced in Qt Mobility 1.0.
Returns a list of keys there is extended meta-data available for.
This function was introduced in Qt Mobility 1.0.
Returns a list of keys there is meta-data available for.
This function was introduced in Qt Mobility 1.0.
Bind object to the QMediaObject instance.
This method establishes a relationship between the media object and a helper object. The nature of the relationship depends on both parties. This methods returns true if the helper was successfully bound, false otherwise.
The object passed must implement the QMediaBindableInterface interface.
This function was introduced in Qt Mobility 1.0.
See also QMediaBindableInterface.
Returns the value associated with a meta-data key.
The naming and type of extended meta-data is not standardized, so the values and meaning of keys may vary between backends.
This function was introduced in Qt Mobility 1.0.
Returns true if the service is available for use.
This function was introduced in Qt Mobility 1.0.
Returns true if there is meta-data associated with this media object, else false.
This function was introduced in Qt Mobility 1.0.
Returns the value associated with a meta-data key.
This function was introduced in Qt Mobility 1.0.
Signals that the available state of a media object's meta-data has changed.
This function was introduced in Qt Mobility 1.0.
Signals that a media object's meta-data has changed.
This function was introduced in Qt Mobility 1.0.
Signal a change in the notify interval period to milliseconds.
This function was introduced in Qt Mobility 1.0.
Remove property name from the list of properties whose changes are regularly signaled.
This function was introduced in Qt Mobility 1.0.
See also notifyInterval.
Returns the media service that provides the functionality of a multimedia object.
This function was introduced in Qt Mobility 1.0.
Detach object from the QMediaObject instance.
Disconnect the help object from the media object.
This function was introduced in Qt Mobility 1.0.
See also QMediaBindableInterface.