內容

• 公共函數
• 公共槽
• 信號
• 保護函數
• 宏
• 詳細描述

QMediaRecorderControl Class

The QMediaRecorderControl class provides access to the recording functionality of a QMediaService . 更多...

頭：	#include <QMediaRecorderControl>
qmake:	QT += multimedia
繼承：	QMediaControl

• 所有成員列錶，包括繼承成員

公共函數

virtual	~QMediaRecorderControl ()
virtual void	applySettings () = 0
virtual qint64	duration () const = 0
virtual bool	isMuted () const = 0
virtual QUrl	outputLocation () const = 0
virtual bool	setOutputLocation (const QUrl & location ) = 0
virtual QMediaRecorder::State	state () const = 0
virtual QMediaRecorder::Status	status () const = 0
virtual qreal	volume () const = 0

• 32 公共函數繼承自 QObject

公共槽

virtual void	setMuted (bool muted ) = 0
virtual void	setState (QMediaRecorder::State state ) = 0
virtual void	setVolume (qreal volume ) = 0

• 1 公共槽繼承自 QObject

信號

void	actualLocationChanged (const QUrl & location )
void	durationChanged (qint64 duration )
void	error (int error , const QString & errorString )
void	mutedChanged (bool muted )
void	stateChanged (QMediaRecorder::State state )
void	statusChanged (QMediaRecorder::Status status )
void	volumeChanged (qreal gain )

• 2 信號繼承自 QObject

保護函數

QMediaRecorderControl (QObject * parent = Q_NULLPTR)

• 9 保護函數繼承自 QObject

宏

QMediaRecorderControl_iid

額外繼承成員

• 1 特性繼承自 QObject
• 11 靜態公共成員繼承自 QObject

詳細描述

The QMediaRecorderControl class provides access to the recording functionality of a QMediaService .

Generally you will use the QMediaRecorder class in application code - this class is mostly used when implementing a new QMediaService or if there is access to specific low level functionality not otherwise present in QMediaRecorder .

若 QMediaService can record media it will implement QMediaRecorderControl . This control provides a means to set the output location , and record, pause and stop recording via the setState () method. It also provides feedback on the duration of the recording.

接口名稱對於 QMediaRecorderControl is org.qt-project.qt.mediarecordercontrol/5.0 作為定義在 QMediaRecorderControl_iid .

另請參閱 QMediaService::requestControl () 和 QMediaRecorder .

成員函數文檔編製

[protected] QMediaRecorderControl:: QMediaRecorderControl ( QObject * parent = Q_NULLPTR)

Constructs a media recorder control with the given parent .

[虛擬] QMediaRecorderControl:: ~QMediaRecorderControl ()

Destroys a media recorder control.

[signal] void QMediaRecorderControl:: actualLocationChanged (const QUrl & location )

Signals that the actual media location has changed. This signal should be emitted at start of recording.

[pure virtual] void QMediaRecorderControl:: applySettings ()

Commits the encoder settings and performs pre-initialization to reduce delays when recording is started.

[pure virtual] qint64 QMediaRecorderControl:: duration () const

Return the current duration in milliseconds.

[signal] void QMediaRecorderControl:: durationChanged ( qint64 duration )

發射信號，當 duration of the recorded media has changed.

This only emitted when there is a discontinuous change in the duration such as being reset to 0.

[signal] void QMediaRecorderControl:: error ( int error , const QString & errorString )

發射信號，當 error 齣現。 errorString describes the error.

[pure virtual] bool QMediaRecorderControl:: isMuted () const

Returns true if the recorder is muted, and false if it is not.

[signal] void QMediaRecorderControl:: mutedChanged ( bool muted )

發射信號，當 muted state of a media recorder has changed.

[pure virtual] QUrl QMediaRecorderControl:: outputLocation () const

Returns the current output location being used.

另請參閱 setOutputLocation ().

[pure virtual slot] void QMediaRecorderControl:: setMuted ( bool muted )

設置 muted state of a media recorder.

另請參閱 isMuted ().

[pure virtual] bool QMediaRecorderControl:: setOutputLocation (const QUrl & location )

Sets the output location and returns if this operation is successful. If file at the output location already exists, it should be overwritten.

The location can be relative or empty; in this case the service should use the system specific place and file naming scheme.

After recording has started, the backend should report the actual file location with actualLocationChanged () 信號。

另請參閱 outputLocation ().

[pure virtual slot] void QMediaRecorderControl:: setState ( QMediaRecorder::State state )

Set the media recorder state .

另請參閱 state ().

[pure virtual slot] void QMediaRecorderControl:: setVolume ( qreal volume )

設置音頻 volume of a media recorder control.

The volume is scaled linearly, ranging from 0 (無聲) 到 100 (full volume).

另請參閱 volume ().

[pure virtual] QMediaRecorder::State QMediaRecorderControl:: state () const

Return the current recording state.

另請參閱 setState ().

[signal] void QMediaRecorderControl:: stateChanged ( QMediaRecorder::State state )

發射信號，當 state of a media recorder has changed.

[pure virtual] QMediaRecorder::Status QMediaRecorderControl:: status () const

Return the current recording status.

[signal] void QMediaRecorderControl:: statusChanged ( QMediaRecorder::Status status )

發射信號，當 status of a media recorder has changed.

[pure virtual] qreal QMediaRecorderControl:: volume () const

Returns the audio volume of a media recorder control.

另請參閱 setVolume ().

[signal] void QMediaRecorderControl:: volumeChanged ( qreal gain )

發射信號，當音頻 gain value has changed.

宏文檔編製

QMediaRecorderControl_iid

org.qt-project.qt.mediarecordercontrol/5.0

定義接口名為 QMediaRecorderControl 類。