QMediaStreamsControl Class

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

Header: #include <QMediaStreamsControl>
qmake: QT += multimedia
Inherits: QMediaControl

Public Types

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

Public Functions

virtual ~QMediaStreamsControl()
virtual bool isActive(int streamNumber) = 0
virtual QVariant metaData(int streamNumber, const QString &key) = 0
virtual void setActive(int streamNumber, bool state) = 0
virtual int streamCount() = 0
virtual QMediaStreamsControl::StreamType streamType(int streamNumber) = 0
  • 30 public functions inherited from QObject

Signals

Protected Functions

QMediaStreamsControl(QObject *parent = nullptr)
  • 9 protected functions inherited from QObject
typedef QObjectList
QList<T> qFindChildren(const QObject *obj, const QRegExp &regExp)
T qobject_cast(QObject *object)
T qobject_cast(const QObject *object)

Macros

Additional Inherited Members

  • 1 property inherited from QObject
  • 1 public slot inherited from QObject
  • 9 static public members inherited from QObject

Detailed Description

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 org.qt-project.qt.mediastreamscontrol/5.0 as defined in QMediaStreamsControl_iid.

See also QMediaService::requestControl().

Member Type Documentation

enum QMediaStreamsControl::StreamType

Media stream type.

ConstantValueDescription
QMediaStreamsControl::AudioStream2Audio stream.
QMediaStreamsControl::VideoStream1Video stream.
QMediaStreamsControl::SubPictureStream3Subpicture or teletext stream.
QMediaStreamsControl::UnknownStream0The stream type is unknown.
QMediaStreamsControl::DataStream4 

Member Function Documentation

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

Constructs a new media streams control with the given parent.

[signal] void QMediaStreamsControl::activeStreamsChanged()

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

[signal] void QMediaStreamsControl::streamsChanged()

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

[virtual] QMediaStreamsControl::~QMediaStreamsControl()

Destroys a media streams control.

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

Returns true if the media stream streamNumber is active.

[pure virtual] QVariant QMediaStreamsControl::metaData(int streamNumber, const QString &key)

Returns the meta-data value of key for the given streamNumber.

Useful metadata keys are QMediaMetaData::Title, QMediaMetaData::Description and QMediaMetaData::Language.

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

Sets the active state of media stream streamNumber.

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.

See also isActive().

[pure virtual] int QMediaStreamsControl::streamCount()

Returns the number of media streams.

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

Return the type of media stream streamNumber.

Macro Documentation

QMediaStreamsControl::QMediaStreamsControl_iid

org.qt-project.qt.mediastreamscontrol/5.0

Defines the interface name of the QMediaStreamsControl class.