The QMetaDataReaderControl class provides read access to the meta-data of a QMediaService's media. More...
#include <QMetaDataReaderControl>
Inherits: QMediaControl.
This class was introduced in Qt Mobility 1.0.
| ~QMetaDataReaderControl () | |
| virtual QStringList | availableExtendedMetaData () const = 0 |
| virtual QList<QtMultimediaKit::MetaData> | availableMetaData () const = 0 |
| virtual QVariant | extendedMetaData ( const QString & key ) const = 0 |
| virtual bool | isMetaDataAvailable () const = 0 |
| virtual QVariant | metaData ( QtMultimediaKit::MetaData key ) const = 0 |
| void | metaDataAvailableChanged ( bool available ) |
| void | metaDataChanged () |
| QMetaDataReaderControl ( QObject * parent = 0 ) |
| QMetaDataReaderControl_iid |
The QMetaDataReaderControl class provides read access to the meta-data of a QMediaService's media.
If a QMediaService can provide read or write access to the meta-data of its current media it will implement QMetaDataReaderControl. This control provides functions for both retrieving and setting meta-data values. Meta-data may be addressed by the well defined keys in the QtMultimediaKit::MetaData enumeration using the metaData() functions, or by string keys using the extendedMetaData() functions.
The functionality provided by this control is exposed to application code by the meta-data members of QMediaObject, and so meta-data access is potentially available in any of the media object classes. Any media service may implement QMetaDataReaderControl.
The interface name of QMetaDataReaderControl is com.nokia.Qt.QMetaDataReaderControl/1.0 as defined in QMetaDataReaderControl_iid.
See also QMediaService::requestControl() and QMediaObject.
Construct a QMetaDataReaderControl with parent. This class is meant as a base class for service specific meta data providers so this constructor is protected.
Destroy the meta-data object.
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.
Returns the metaData for an abitrary string key.
The valid selection of keys for extended meta-data is determined by the provider and the meaning and type may differ between providers.
This function was introduced in Qt Mobility 1.0.
Identifies if meta-data is available from a media service.
Returns true if the meta-data is available and false otherwise.
This function was introduced in Qt Mobility 1.0.
Returns the meta-data for the given key.
This function was introduced in Qt Mobility 1.0.
Signal the availability of meta-data has changed, available will be true if the multimedia object has meta-data.
This function was introduced in Qt Mobility 1.0.
Signal the changes of meta-data.
This function was introduced in Qt Mobility 1.0.
com.nokia.Qt.QMetaDataReaderControl/1.0
Defines the interface name of the QMetaDataReaderControl class.
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