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
void | activeStreamsChanged() |
void | streamsChanged() |
- 2 signals inherited from QObject
Protected Functions
QMediaStreamsControl(QObject *parent = nullptr) |
- 9 protected functions inherited from QObject
Related Non-Members
typedef | QObjectList |
QList<T> | qFindChildren(const QObject *obj, const QRegExp ®Exp) |
T | qobject_cast(QObject *object) |
T | qobject_cast(const QObject *object) |
Macros
QMediaStreamsControl_iid | |
QT_NO_NARROWING_CONVERSIONS_IN_CONNECT | |
Q_CLASSINFO(Name, Value) | |
Q_DISABLE_COPY(Class) | |
Q_DISABLE_COPY_MOVE(Class) | |
Q_DISABLE_MOVE(Class) | |
Q_EMIT | |
Q_ENUM(...) | |
Q_ENUM_NS(...) | |
Q_FLAG(...) | |
Q_FLAG_NS(...) | |
Q_GADGET | |
Q_INTERFACES(...) | |
Q_INVOKABLE | |
Q_MEDIA_DECLARE_CONTROL(Class, IId) | |
Q_NAMESPACE | |
Q_OBJECT | |
Q_PROPERTY(...) | |
Q_REVISION | |
Q_SET_OBJECT_NAME(Object) | |
Q_SIGNAL | |
Q_SIGNALS | |
Q_SLOT | |
Q_SLOTS |
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.
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
[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.