Provides a set of viewfinder settings. More...

Public Methods
	QCameraViewfinderSettings ()

	QCameraViewfinderSettings (const QCameraViewfinderSettings &other)

	~QCameraViewfinderSettings ()

bool	isNull () const

qreal	maximumFrameRate () const

qreal	minimumFrameRate () const

bool	operator!= (const QCameraViewfinderSettings &other) const

QCameraViewfinderSettings &	operator= (const QCameraViewfinderSettings &other)

QCameraViewfinderSettings &	operator= (QCameraViewfinderSettings &&other)

bool	operator== (const QCameraViewfinderSettings &other) const

QSize	pixelAspectRatio () const

QVideoFrame::PixelFormat	pixelFormat () const

QSize	resolution () const

void	setMaximumFrameRate (qreal rate)

void	setMinimumFrameRate (qreal rate)

void	setPixelAspectRatio (const QSize &ratio)

void	setPixelAspectRatio (int horizontal, int vertical)

void	setPixelFormat (QVideoFrame::PixelFormat format)

void	setResolution (const QSize &resolution)

void	setResolution (int width, int height)

void	swap (QCameraViewfinderSettings &other)

Detailed Description

The QCameraViewfinderSettings class provides a set of viewfinder settings. A viewfinder settings object is used to specify the viewfinder settings used by QCamera. Viewfinder settings are selected by constructing a QCameraViewfinderSettings object, setting the desired properties and then passing it to a QCamera instance using the QCamera::setViewfinderSettings() method.

QCameraViewfinderSettings viewfinderSettings;
viewfinderSettings.setResolution(640, 480);
viewfinderSettings.setMinimumFrameRate(15.0);
viewfinderSettings.setMaximumFrameRate(30.0);
 
camera->setViewfinderSettings(viewfinderSettings);

Different cameras may have different capabilities. The application should query the camera capabilities before setting parameters. For example, the application should call QCamera::supportedViewfinderResolutions() before calling setResolution().

See also: QCamera

Constructor & Destructor Documentation

QCameraViewfinderSettings::QCameraViewfinderSettings ( )

Constructs a null viewfinder settings object.

QCameraViewfinderSettings::QCameraViewfinderSettings ( const QCameraViewfinderSettings & other )

Constructs a copy of the viewfinder settings object other.

QCameraViewfinderSettings::~QCameraViewfinderSettings ( )

Destroys a viewfinder settings object.

Method Documentation

bool QCameraViewfinderSettings::isNull ( ) const

Identifies if a viewfinder settings object is uninitialized.

Returns true if the settings are null, and false if they are not.

qreal QCameraViewfinderSettings::maximumFrameRate ( ) const

Returns the viewfinder maximum frame rate in frames per second.

See also: setMaximumFrameRate(), minimumFrameRate()

qreal QCameraViewfinderSettings::minimumFrameRate ( ) const

Returns the viewfinder minimum frame rate in frames per second.

See also: setMinimumFrameRate(), maximumFrameRate()

bool QCameraViewfinderSettings::operator!= ( const QCameraViewfinderSettings & other ) const

inline

Returns true if this object is not equal to other, otherwise returns false.

QCameraViewfinderSettings & QCameraViewfinderSettings::operator= ( const QCameraViewfinderSettings & other )

Copy assigns from other and returns a reference to this object.

QCameraViewfinderSettings & QCameraViewfinderSettings::operator= ( QCameraViewfinderSettings && other )

inline

Move assigns from other and returns a reference to this object.

bool QCameraViewfinderSettings::operator== ( const QCameraViewfinderSettings & other ) const

Returns true if this object is equal to other, otherwise returns false.

QSize QCameraViewfinderSettings::pixelAspectRatio ( ) const

Returns the viewfinder pixel aspect ratio.

See also: setPixelAspectRatio()

QVideoFrame::PixelFormat QCameraViewfinderSettings::pixelFormat ( ) const

Returns the viewfinder pixel format.

See also: setPixelFormat()

QSize QCameraViewfinderSettings::resolution ( ) const

Returns the viewfinder resolution.

See also: setResolution()

void QCameraViewfinderSettings::setMaximumFrameRate ( qreal rate )

Sets the viewfinder maximum frame rate in frames per second.

If the maximum frame rate is equal to the minimum frame rate, the frame rate is fixed. If not, the actual frame rate fluctuates between the minimum and the maximum.

If the given rate equals to 0, the backend makes an optimal choice based on the supported frame rates and the other viewfinder settings.

See also: maximumFrameRate(), setMinimumFrameRate(), QCamera::supportedViewfinderFrameRateRanges()

void QCameraViewfinderSettings::setMinimumFrameRate ( qreal rate )

Sets the viewfinder minimum frame rate in frames per second.

If the minimum frame rate is equal to the maximum frame rate, the frame rate is fixed. If not, the actual frame rate fluctuates between the minimum and the maximum.

If the given rate equals to 0, the backend makes an optimal choice based on the supported frame rates and the other viewfinder settings.

See also: minimumFrameRate(), setMaximumFrameRate(), QCamera::supportedViewfinderFrameRateRanges()

void QCameraViewfinderSettings::setPixelAspectRatio ( const QSize & ratio )

Sets the viewfinder pixel aspect ratio.

See also: pixelAspectRatio()

void QCameraViewfinderSettings::setPixelAspectRatio	(	int	horizontal,
		int	vertical
	)

inline

Sets the horizontal and vertical elements of the viewfinder's pixel aspect ratio.

void QCameraViewfinderSettings::setPixelFormat ( QVideoFrame::PixelFormat format )

Sets the viewfinder pixel format.

If the given format is equal to QVideoFrame::Format_Invalid, the backend uses the default format.

See also: pixelFormat(), QCamera::supportedViewfinderPixelFormats()

void QCameraViewfinderSettings::setResolution ( const QSize & resolution )

Sets the viewfinder resolution.

If the given resolution is empty, the backend makes an optimal choice based on the supported resolutions and the other viewfinder settings. If the camera is used to capture videos or images, the viewfinder resolution might be ignored if it conflicts with the capture resolution.

See also: resolution(), QVideoEncoderSettings::setResolution(), QImageEncoderSettings::setResolution(), QCamera::supportedViewfinderResolutions()

void QCameraViewfinderSettings::setResolution	(	int	width,
		int	height
	)

inline

Sets the width and height of the viewfinder resolution.

void QCameraViewfinderSettings::swap ( QCameraViewfinderSettings & other )

inline

Swaps this viewfinder settings object with other. This function is very fast and never fails.

Public Methods

Detailed Description

Constructor & Destructor Documentation

Method Documentation