MeeGo 1.2 Harmattan Developer Documentation Develop for the Nokia N9

QMediaStreamsControl Class Reference

The QMediaStreamsControl class provides a media stream selection control. More...

 #include <QMediaStreamsControl>

This class is under development and is subject to change.

Inherits: QMediaControl.

This class was introduced in Qt Mobility 1.0.

Public Types

enum StreamType { AudioStream, VideoStream, SubPictureStream, UnknownStream, DataStream }

Public Functions

virtual ~QMediaStreamsControl ()
virtual bool isActive ( int stream ) = 0
virtual QVariant metaData ( int stream, QtMultimediaKit::MetaData key ) = 0
virtual void setActive ( int stream, bool state ) = 0
virtual int streamCount () = 0
virtual StreamType streamType ( int stream ) = 0
  • 29 public functions inherited from QObject

Signals

void activeStreamsChanged ()
void streamsChanged ()

Protected Functions

QMediaStreamsControl ( QObject * parent = 0 )
  • 7 protected functions inherited from QObject

Macros

QMediaStreamsControl_iid

Additional Inherited Members

  • 1 property inherited from QObject
  • 1 public slot inherited from QObject
  • 1 public variable inherited from QObject
  • 4 static public members inherited from QObject
  • 2 protected variables inherited from QObject

Detailed Description

The QMediaStreamsControl class provides a media stream selection control.

The QMediaStreamsControl class provides descriptions of the available media streams and allows individual streams to be activated and deactivated.

The interface name of QMediaStreamsControl is com.nokia.Qt.MediaStreamsControl as defined in QMediaStreamsControl_iid.

See also QMediaService::requestControl().

Member Type Documentation

enum QMediaStreamsControl::StreamType

Media stream type.

Constant Value Description
QMediaStreamsControl::AudioStream 2 Audio stream.
QMediaStreamsControl::VideoStream 1 Video stream.
QMediaStreamsControl::SubPictureStream 3 Subpicture or teletext stream.
QMediaStreamsControl::UnknownStream 0 The stream type is unknown.
QMediaStreamsControl::DataStream 4  

Member Function Documentation

QMediaStreamsControl::QMediaStreamsControl ( QObject * parent = 0 ) [protected]

Constructs a new media streams control with the given parent.

QMediaStreamsControl::~QMediaStreamsControl () [virtual]

Destroys a media streams control.

void QMediaStreamsControl::activeStreamsChanged () [signal]

The signal is emitted when the active streams list is changed.

This function was introduced in Qt Mobility 1.0.

bool QMediaStreamsControl::isActive ( int stream ) [pure virtual]

Returns true if the media stream is active.

This function was introduced in Qt Mobility 1.0.

QVariant QMediaStreamsControl::metaData ( int stream, QtMultimediaKit::MetaData key ) [pure virtual]

Returns the meta-data value of key for a given stream.

Useful metadata keya are QtMultimediaKit::Title, QtMultimediaKit::Description and QtMultimediaKit::Language.

This function was introduced in Qt Mobility 1.0.

void QMediaStreamsControl::setActive ( int stream, bool state ) [pure virtual]

Sets the active state of a media stream.

Setting the active state of a media stream to true will activate it. If any other stream of the same type was previously active it will be deactivated. Setting the active state fo a media stream to false will deactivate it.

This function was introduced in Qt Mobility 1.0.

See also isActive().

int QMediaStreamsControl::streamCount () [pure virtual]

Returns the number of media streams.

This function was introduced in Qt Mobility 1.0.

StreamType QMediaStreamsControl::streamType ( int stream ) [pure virtual]

Return the type of a media stream.

This function was introduced in Qt Mobility 1.0.

void QMediaStreamsControl::streamsChanged () [signal]

The signal is emitted when the available streams list is changed.

This function was introduced in Qt Mobility 1.0.

Macro Documentation

QMediaStreamsControl_iid

com.nokia.Qt.MediaStreamsControl

Defines the interface name of the QMediaStreamsControl class.

This function was introduced in Qt Mobility 1.0.