QV4L2Camera Class Reference

#include <qv4l2camera_p.h>

Inheritance diagram for QV4L2Camera:

Collaboration diagram for QV4L2Camera:

Public Member Functions
	QV4L2Camera (QCamera *parent)
	~QV4L2Camera ()
bool	isActive () const override
void	setActive (bool active) override
void	setCamera (const QCameraDevice &camera) override
bool	setCameraFormat (const QCameraFormat &format) override
bool	resolveCameraFormat (const QCameraFormat &format)
bool	isFocusModeSupported (QCamera::FocusMode mode) const override
void	setFocusMode (QCamera::FocusMode) override
void	setFocusDistance (float) override
void	zoomTo (float, float=-1.) override
void	setFlashMode (QCamera::FlashMode) override
bool	isFlashModeSupported (QCamera::FlashMode mode) const override
bool	isFlashReady () const override
void	setTorchMode (QCamera::TorchMode) override
bool	isTorchModeSupported (QCamera::TorchMode mode) const override
void	setExposureMode (QCamera::ExposureMode) override
bool	isExposureModeSupported (QCamera::ExposureMode mode) const override
void	setExposureCompensation (float) override
int	isoSensitivity () const override
void	setManualIsoSensitivity (int) override
void	setManualExposureTime (float) override
float	exposureTime () const override
bool	isWhiteBalanceModeSupported (QCamera::WhiteBalanceMode mode) const override
void	setWhiteBalanceMode (QCamera::WhiteBalanceMode) override
void	setColorTemperature (int) override
QVideoFrameFormat	frameFormat () const override
Public Member Functions inherited from QPlatformCamera
QCameraFormat	cameraFormat () const
virtual void	setCustomFocusPoint (const QPointF &)
QCamera::Features	supportedFeatures () const
QCamera::FocusMode	focusMode () const
QPointF	focusPoint () const
float	minZoomFactor () const
float	maxZoomFactor () const
float	zoomFactor () const
QPointF	customFocusPoint () const
float	focusDistance () const
QCamera::FlashMode	flashMode () const
QCamera::TorchMode	torchMode () const
QCamera::ExposureMode	exposureMode () const
float	exposureCompensation () const
int	manualIsoSensitivity () const
int	minIso () const
int	maxIso () const
float	manualExposureTime () const
float	minExposureTime () const
float	maxExposureTime () const
QCamera::WhiteBalanceMode	whiteBalanceMode () const
int	colorTemperature () const
void	supportedFeaturesChanged (QCamera::Features)
void	minimumZoomFactorChanged (float factor)
void	maximumZoomFactorChanged (float)
void	focusModeChanged (QCamera::FocusMode mode)
void	customFocusPointChanged (const QPointF &point)
void	focusDistanceChanged (float d)
void	zoomFactorChanged (float zoom)
void	flashReadyChanged (bool)
void	flashModeChanged (QCamera::FlashMode mode)
void	torchModeChanged (QCamera::TorchMode mode)
void	exposureModeChanged (QCamera::ExposureMode mode)
void	exposureCompensationChanged (float compensation)
void	exposureCompensationRangeChanged (float min, float max)
void	isoSensitivityChanged (int iso)
void	minIsoChanged (int iso)
void	maxIsoChanged (int iso)
void	exposureTimeChanged (float speed)
void	minExposureTimeChanged (float secs)
void	maxExposureTimeChanged (float secs)
void	whiteBalanceModeChanged (QCamera::WhiteBalanceMode mode)
void	colorTemperatureChanged (int temperature)
Public Member Functions inherited from QPlatformVideoSource
virtual std::optional< int >	ffmpegHWPixelFormat () const
virtual void	setCaptureSession (QPlatformMediaCaptureSession *)
Q_INVOKABLE	QObject (QObject *parent=nullptr)
	Constructs an object with parent object parent.
	QObject (QObjectPrivate &dd, QObject *parent=nullptr)
Public Member Functions inherited from QObject
Q_INVOKABLE	QObject (QObject *parent=nullptr)
	Constructs an object with parent object parent.
virtual	~QObject ()
	Destroys the object, deleting all its child objects.
virtual bool	event (QEvent *event)
	This virtual function receives events to an object and should return true if the event e was recognized and processed.
virtual bool	eventFilter (QObject *watched, QEvent *event)
	Filters events if this object has been installed as an event filter for the watched object.
QString	objectName () const
Q_WEAK_OVERLOAD void	setObjectName (const QString &name)
	Sets the object's name to name.
void	setObjectName (QAnyStringView name)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.
QBindable< QString >	bindableObjectName ()
bool	isWidgetType () const
	Returns true if the object is a widget; otherwise returns false.
bool	isWindowType () const
	Returns true if the object is a window; otherwise returns false.
bool	isQuickItemType () const
	Returns true if the object is a QQuickItem; otherwise returns false.
bool	signalsBlocked () const noexcept
	Returns true if signals are blocked; otherwise returns false.
bool	blockSignals (bool b) noexcept
	If block is true, signals emitted by this object are blocked (i.e., emitting a signal will not invoke anything connected to it).
QThread *	thread () const
	Returns the thread in which the object lives.
bool	moveToThread (QThread *thread QT6_DECL_NEW_OVERLOAD_TAIL)
	Changes the thread affinity for this object and its children and returns true on success.
int	startTimer (int interval, Qt::TimerType timerType=Qt::CoarseTimer)
	This is an overloaded function that will start a timer of type timerType and a timeout of interval milliseconds.
int	startTimer (std::chrono::nanoseconds time, Qt::TimerType timerType=Qt::CoarseTimer)
void	killTimer (int id)
	Kills the timer with timer identifier, id.
void	killTimer (Qt::TimerId id)
template<typename T >
T	findChild (QAnyStringView aName, Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
	Returns the child of this object that can be cast into type T and that is called name, or \nullptr if there is no such object.
template<typename T >
QList< T >	findChildren (QAnyStringView aName, Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
	Returns all children of this object with the given name that can be cast to type T, or an empty list if there are no such objects.
template<typename T >
T	findChild (Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.
template<typename T >
QList< T >	findChildren (Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.
const QObjectList &	children () const
	Returns a list of child objects.
void	setParent (QObject *parent)
	Makes the object a child of parent.
void	installEventFilter (QObject *filterObj)
	Installs an event filter filterObj on this object.
void	removeEventFilter (QObject *obj)
	Removes an event filter object obj from this object.
QMetaObject::Connection	connect (const QObject *sender, const char *signal, const char *member, Qt::ConnectionType type=Qt::AutoConnection) const
bool	disconnect (const char *signal=nullptr, const QObject *receiver=nullptr, const char *member=nullptr) const
bool	disconnect (const QObject *receiver, const char *member=nullptr) const
void	dumpObjectTree () const
	Dumps a tree of children to the debug output.
void	dumpObjectInfo () const
	Dumps information about signal connections, etc.
bool	setProperty (const char *name, const QVariant &value)
	Sets the value of the object's name property to value.
bool	setProperty (const char *name, QVariant &&value)
QVariant	property (const char *name) const
	Returns the value of the object's name property.
QList< QByteArray >	dynamicPropertyNames () const
QBindingStorage *	bindingStorage ()
const QBindingStorage *	bindingStorage () const
QObject *	parent () const
	Returns a pointer to the parent object.
bool	inherits (const char *classname) const
	Returns true if this object is an instance of a class that inherits className or a QObject subclass that inherits className; otherwise returns false.

Additional Inherited Members
Public Slots inherited from QObject
void	deleteLater ()
	\threadsafe
Signals inherited from QPlatformCamera
void	error (int error, const QString &errorString)
Signals inherited from QPlatformVideoSource
void	newVideoFrame (const QVideoFrame &)
void	activeChanged (bool)
Signals inherited from QObject
void	destroyed (QObject *=nullptr)
	This signal is emitted immediately before the object obj is destroyed, after any instances of QPointer have been notified, and cannot be blocked.
void	objectNameChanged (const QString &objectName, QPrivateSignal)
	This signal is emitted after the object's name has been changed.
Static Public Member Functions inherited from QPlatformCamera
static int	colorTemperatureForWhiteBalance (QCamera::WhiteBalanceMode mode)
Static Public Member Functions inherited from QObject
static QMetaObject::Connection	connect (const QObject *sender, const char *signal, const QObject *receiver, const char *member, Qt::ConnectionType=Qt::AutoConnection)
	\threadsafe
static QMetaObject::Connection	connect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &method, Qt::ConnectionType type=Qt::AutoConnection)
template<typename Func1 , typename Func2 >
static QMetaObject::Connection	connect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, const typename QtPrivate::ContextTypeForFunctor< Func2 >::ContextType *context, Func2 &&slot, Qt::ConnectionType type=Qt::AutoConnection)
template<typename Func1 , typename Func2 >
static QMetaObject::Connection	connect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, Func2 &&slot)
static bool	disconnect (const QObject *sender, const char *signal, const QObject *receiver, const char *member)
	\threadsafe
static bool	disconnect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &member)
static bool	disconnect (const QMetaObject::Connection &)
	Disconnect a connection.
template<typename Func1 , typename Func2 >
static bool	disconnect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, const typename QtPrivate::FunctionPointer< Func2 >::Object *receiver, Func2 slot)
template<typename Func1 >
static bool	disconnect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, const QObject *receiver, void **zero)
Protected Member Functions inherited from QPlatformCamera
	QPlatformCamera (QCamera *parent)
virtual int	cameraPixelFormatScore (QVideoFrameFormat::PixelFormat, QVideoFrameFormat::ColorRange) const
QCameraFormat	findBestCameraFormat (const QCameraDevice &camera) const
Protected Member Functions inherited from QObject
QObject *	sender () const
	Returns a pointer to the object that sent the signal, if called in a slot activated by a signal; otherwise it returns \nullptr.
int	senderSignalIndex () const
int	receivers (const char *signal) const
	Returns the number of receivers connected to the signal.
bool	isSignalConnected (const QMetaMethod &signal) const
virtual void	timerEvent (QTimerEvent *event)
	This event handler can be reimplemented in a subclass to receive timer events for the object.
virtual void	childEvent (QChildEvent *event)
	This event handler can be reimplemented in a subclass to receive child events.
virtual void	customEvent (QEvent *event)
	This event handler can be reimplemented in a subclass to receive custom events.
virtual void	connectNotify (const QMetaMethod &signal)
virtual void	disconnectNotify (const QMetaMethod &signal)
	QObject (QObjectPrivate &dd, QObject *parent=nullptr)
Protected Attributes inherited from QPlatformCamera
QCameraFormat	m_cameraFormat
QVideoFrameFormat::PixelFormat	m_framePixelFormat = QVideoFrameFormat::Format_Invalid
Protected Attributes inherited from QObject
QScopedPointer< QObjectData >	d_ptr
Properties inherited from QObject
QString	objectName
	the name of this object
Related Symbols inherited from QObject
template< class T > T	qobject_cast (const QObject *object)
	Returns the given object cast to type T if the object is of type T (or of a subclass); otherwise returns \nullptr.
template< typename T > T	qFindChildqFindChildren (const QObject *obj, const QString &name)()
template< typename T > QList< T >	qFindChildrenqFindChildren (const QObject *obj, const QString &name)()
	QObjectList
	\macro Q_CLASSINFO(Name, Value)

Detailed Description

Definition at line 54 of file qv4l2camera_p.h.

Constructor & Destructor Documentation

QV4L2Camera()

QV4L2Camera::QV4L2Camera ( QCamera * parent )

explicit

Definition at line 68 of file qv4l2camera.cpp.

~QV4L2Camera()

QV4L2Camera::~QV4L2Camera

(

)

Definition at line 73 of file qv4l2camera.cpp.

Member Function Documentation

exposureTime()

float QV4L2Camera::exposureTime ( ) const

overridevirtual

Reimplemented from QPlatformCamera.

Definition at line 321 of file qv4l2camera.cpp.

frameFormat()

QVideoFrameFormat QV4L2Camera::frameFormat ( ) const

overridevirtual

Reimplemented from QPlatformCamera.

Definition at line 698 of file qv4l2camera.cpp.

References QPlatformCamera::frameFormat().

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isActive()

bool QV4L2Camera::isActive ( ) const

overridevirtual

Implements QPlatformVideoSource.

Definition at line 79 of file qv4l2camera.cpp.

isExposureModeSupported()

bool QV4L2Camera::isExposureModeSupported ( QCamera::ExposureMode mode ) const

overridevirtual

Reimplemented from QPlatformCamera.

Definition at line 271 of file qv4l2camera.cpp.

References V4L2CameraInfo::autoExposureSupported, QCamera::ExposureAuto, QCamera::ExposureManual, and V4L2CameraInfo::manualExposureSupported.

isFlashModeSupported()

bool QV4L2Camera::isFlashModeSupported ( QCamera::FlashMode mode ) const

overridevirtual

Reimplemented from QPlatformCamera.

Definition at line 228 of file qv4l2camera.cpp.

References QCamera::FlashAuto, QCamera::FlashOff, and V4L2CameraInfo::flashSupported.

isFlashReady()

bool QV4L2Camera::isFlashReady ( ) const

overridevirtual

Reimplemented from QPlatformCamera.

Definition at line 235 of file qv4l2camera.cpp.

isFocusModeSupported()

bool QV4L2Camera::isFocusModeSupported ( QCamera::FocusMode mode ) const

overridevirtual

Reimplemented from QPlatformCamera.

Definition at line 211 of file qv4l2camera.cpp.

References QCamera::FocusDistance, QCamera::FocusModeAuto, QCamera::FocusModeAutoNear, QCamera::FocusModeInfinity, QCamera::FocusModeManual, and QPlatformCamera::supportedFeatures().

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isoSensitivity()

int QV4L2Camera::isoSensitivity ( ) const

overridevirtual

Reimplemented from QPlatformCamera.

Definition at line 303 of file qv4l2camera.cpp.

References QCamera::IsoSensitivity, and QPlatformCamera::supportedFeatures().

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isTorchModeSupported()

bool QV4L2Camera::isTorchModeSupported ( QCamera::TorchMode mode ) const

overridevirtual

Reimplemented from QPlatformCamera.

Definition at line 252 of file qv4l2camera.cpp.

References QCamera::TorchOff, QCamera::TorchOn, and V4L2CameraInfo::torchSupported.

isWhiteBalanceModeSupported()

bool QV4L2Camera::isWhiteBalanceModeSupported ( QCamera::WhiteBalanceMode mode ) const

overridevirtual

Reimplemented from QPlatformCamera.

Definition at line 326 of file qv4l2camera.cpp.

References V4L2CameraInfo::autoWhiteBalanceSupported, V4L2CameraInfo::colorTemperatureSupported, and QCamera::WhiteBalanceAuto.

Referenced by setColorTemperature(), and setWhiteBalanceMode().

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resolveCameraFormat()

bool QV4L2Camera::resolveCameraFormat

(

const QCameraFormat &

format

)

Definition at line 141 of file qv4l2camera.cpp.

References QPlatformCamera::findBestCameraFormat(), fmt, and QPlatformCamera::m_cameraFormat.

Referenced by setActive(), setCamera(), and setCameraFormat().

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setActive()

void QV4L2Camera::setActive ( bool active )

overridevirtual

Implements QPlatformVideoSource.

Definition at line 84 of file qv4l2camera.cpp.

References QPlatformVideoSource::activeChanged(), emit, QCameraDevice::isNull(), QCameraFormat::isNull(), m_active, QPlatformCamera::m_cameraFormat, QPlatformVideoSource::newVideoFrame(), and resolveCameraFormat().

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setCamera()

void QV4L2Camera::setCamera ( const QCameraDevice & camera )

overridevirtual

Implements QPlatformCamera.

Definition at line 105 of file qv4l2camera.cpp.

References camera, and resolveCameraFormat().

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setCameraFormat()

bool QV4L2Camera::setCameraFormat ( const QCameraFormat & format )

overridevirtual

Reimplemented from QPlatformCamera.

Definition at line 122 of file qv4l2camera.cpp.

References QListSpecialMethodsBase< T >::contains(), resolveCameraFormat(), and QCameraDevice::videoFormats.

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setColorTemperature()

void QV4L2Camera::setColorTemperature ( int temperature )

overridevirtual

Reimplemented from QPlatformCamera.

Definition at line 345 of file qv4l2camera.cpp.

References QPlatformCamera::colorTemperatureChanged(), isWhiteBalanceModeSupported(), Q_ASSERT, setWhiteBalanceMode(), QCamera::WhiteBalanceAuto, and QCamera::WhiteBalanceManual.

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setExposureCompensation()

void QV4L2Camera::setExposureCompensation ( float compensation )

overridevirtual

Reimplemented from QPlatformCamera.

Definition at line 280 of file qv4l2camera.cpp.

References QPlatformCamera::exposureCompensationChanged(), V4L2CameraInfo::maxExposureAdjustment, V4L2CameraInfo::minExposureAdjustment, and qBound().

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setExposureMode()

void QV4L2Camera::setExposureMode ( QCamera::ExposureMode mode )

overridevirtual

Reimplemented from QPlatformCamera.

Definition at line 259 of file qv4l2camera.cpp.

References V4L2CameraInfo::autoExposureSupported, QCamera::ExposureAuto, QCamera::ExposureManual, QPlatformCamera::exposureModeChanged(), and V4L2CameraInfo::manualExposureSupported.

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setFlashMode()

void QV4L2Camera::setFlashMode ( QCamera::FlashMode mode )

overridevirtual

Reimplemented from QPlatformCamera.

Definition at line 220 of file qv4l2camera.cpp.

References QCamera::FlashAuto, QPlatformCamera::flashModeChanged(), QCamera::FlashOn, and V4L2CameraInfo::flashSupported.

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setFocusDistance()

void QV4L2Camera::setFocusDistance ( float d )

overridevirtual

Reimplemented from QPlatformCamera.

Definition at line 194 of file qv4l2camera.cpp.

References d, QPlatformCamera::focusDistanceChanged(), V4L2CameraInfo::maxFocus, and V4L2CameraInfo::minFocus.

Referenced by setFocusMode().

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setFocusMode()

void QV4L2Camera::setFocusMode ( QCamera::FocusMode mode )

overridevirtual

Reimplemented from QPlatformCamera.

Definition at line 154 of file qv4l2camera.cpp.

References QCamera::FocusDistance, QPlatformCamera::focusDistance(), QPlatformCamera::focusMode(), QCamera::FocusModeAuto, QCamera::FocusModeAutoFar, QCamera::FocusModeAutoNear, QPlatformCamera::focusModeChanged(), QCamera::FocusModeInfinity, QCamera::FocusModeManual, V4L2CameraInfo::maxFocus, V4L2CameraInfo::minFocus, V4L2CameraInfo::rangedFocus, setFocusDistance(), and QPlatformCamera::supportedFeatures().

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setManualExposureTime()

void QV4L2Camera::setManualExposureTime ( float secs )

overridevirtual

Reimplemented from QPlatformCamera.

Definition at line 310 of file qv4l2camera.cpp.

References V4L2CameraInfo::autoExposureSupported, QPlatformCamera::exposureTimeChanged(), V4L2CameraInfo::manualExposureSupported, V4L2CameraInfo::maxExposure, V4L2CameraInfo::minExposure, qBound(), and qRound().

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setManualIsoSensitivity()

void QV4L2Camera::setManualIsoSensitivity ( int iso )

overridevirtual

Reimplemented from QPlatformCamera.

Definition at line 291 of file qv4l2camera.cpp.

References QCamera::IsoSensitivity, QPlatformCamera::maxIso(), QPlatformCamera::minIso(), qBound(), and QPlatformCamera::supportedFeatures().

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setTorchMode()

void QV4L2Camera::setTorchMode ( QCamera::TorchMode mode )

overridevirtual

Reimplemented from QPlatformCamera.

Definition at line 244 of file qv4l2camera.cpp.

References QPlatformCamera::torchModeChanged(), QCamera::TorchOn, and V4L2CameraInfo::torchSupported.

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setWhiteBalanceMode()

void QV4L2Camera::setWhiteBalanceMode ( QCamera::WhiteBalanceMode mode )

overridevirtual

Reimplemented from QPlatformCamera.

Definition at line 334 of file qv4l2camera.cpp.

References QPlatformCamera::colorTemperatureForWhiteBalance(), isWhiteBalanceModeSupported(), Q_ASSERT, QCamera::WhiteBalanceAuto, and QPlatformCamera::whiteBalanceModeChanged().

Referenced by setColorTemperature().

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zoomTo()

void QV4L2Camera::zoomTo ( float factor, float = -1. )

overridevirtual

Reimplemented from QPlatformCamera.

Definition at line 201 of file qv4l2camera.cpp.

References V4L2CameraInfo::maxZoom, V4L2CameraInfo::minZoom, qBound(), and QPlatformCamera::zoomFactorChanged().

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---

The documentation for this class was generated from the following files:

• qtmultimedia/src/plugins/multimedia/ffmpeg/qv4l2camera_p.h (c016e3e8b3364d0f7d152efbe55fc8e66717a156)
• qtmultimedia/src/plugins/multimedia/ffmpeg/qv4l2camera.cpp (93afcabc37ab694fe8295a966ffc4f099ce14b3c)