QCamera

QCamera 

#include <QCamera>

 

Public Types

class	FrameRateRange
enum	CaptureMode { CaptureViewfinder, CaptureStillImage, CaptureVideo }
flags	CaptureModes
enum	Error { NoError, CameraError, InvalidRequestError, ServiceMissingError, NotSupportedFeatureError }
enum	LockChangeReason { UserRequest, LockAcquired, LockFailed, LockLost, LockTemporaryLost }
enum	LockStatus { Unlocked, Searching, Locked }
enum	LockType { NoLock, LockExposure, LockWhiteBalance, LockFocus }
flags	LockTypes
enum	Position { UnspecifiedPosition, BackFace, FrontFace }
enum	State { UnloadedState, LoadedState, ActiveState }
enum	Status { ActiveStatus, StartingStatus, StoppingStatus, StandbyStatus, ..., UnavailableStatus }

Properties

• captureMode : QCamera::CaptureModes
• lockStatus : const QCamera::LockStatus
• state : const QCamera::State
• status : const QCamera::Status

• 1 property inherited from QMediaObject
• 1 property inherited from QObject

Public Functions

	QCamera(QObject *parent = nullptr)
	QCamera(const QByteArray &deviceName, QObject *parent = nullptr)
	QCamera(const QCameraInfo &cameraInfo, QObject *parent = nullptr)
	QCamera(QCamera::Position position, QObject *parent = nullptr)
virtual	~QCamera()
QCamera::CaptureModes	captureMode() const
QCamera::Error	error() const
QString	errorString() const
QCameraExposure *	exposure() const
QCameraFocus *	focus() const
QCameraImageProcessing *	imageProcessing() const
bool	isCaptureModeSupported(QCamera::CaptureModes mode) const
QCamera::LockStatus	lockStatus() const
QCamera::LockStatus	lockStatus(QCamera::LockType lockType) const
QCamera::LockTypes	requestedLocks() const
void	setViewfinder(QVideoWidget *viewfinder)
void	setViewfinder(QGraphicsVideoItem *viewfinder)
void	setViewfinder(QAbstractVideoSurface *surface)
void	setViewfinderSettings(const QCameraViewfinderSettings &settings)
QCamera::State	state() const
QCamera::Status	status() const
QCamera::LockTypes	supportedLocks() const
QList<QCamera::FrameRateRange>	supportedViewfinderFrameRateRanges(const QCameraViewfinderSettings &settings = QCameraViewfinderSettings()) const
QList<QVideoFrame::PixelFormat>	supportedViewfinderPixelFormats(const QCameraViewfinderSettings &settings = QCameraViewfinderSettings()) const
QList<QSize>	supportedViewfinderResolutions(const QCameraViewfinderSettings &settings = QCameraViewfinderSettings()) const
QList<QCameraViewfinderSettings>	supportedViewfinderSettings(const QCameraViewfinderSettings &settings = QCameraViewfinderSettings()) const
QCameraViewfinderSettings	viewfinderSettings() const

Reimplemented Public Functions

virtual QMultimedia::AvailabilityStatus

availability() const override

• 10 public functions inherited from QMediaObject
• 34 public functions inherited from QObject

Public Slots

void	load()
void	searchAndLock()
void	searchAndLock(QCamera::LockTypes locks)
void	setCaptureMode(QCamera::CaptureModes mode)
void	start()
void	stop()
void	unload()
void	unlock()
void	unlock(QCamera::LockTypes locks)

• 1 public slot inherited from QObject

Signals

void	captureModeChanged(QCamera::CaptureModes mode)
void	error(QCamera::Error value)
void	lockFailed()
void	lockStatusChanged(QCamera::LockStatus status, QCamera::LockChangeReason reason)
void	lockStatusChanged(QCamera::LockType lock, QCamera::LockStatus status, QCamera::LockChangeReason reason)
void	locked()
void	stateChanged(QCamera::State state)
void	statusChanged(QCamera::Status status)

• 6 signals inherited from QMediaObject
• 2 signals inherited from QObject

Additional Inherited Members

• 1 public variable inherited from QObject
• 10 static public members inherited from QObject
• 2 protected functions inherited from QMediaObject
• 9 protected functions inherited from QObject
• 2 protected variables inherited from QObject

 

 

详细说明

QCamera类为系统摄像机设备提供接口。

 

QCamera可与用于取景器显示的QCameraViewfinder、用于视频录制的QMediaRecorder和用于图像拍摄的QCamerAmageCapture一起使用。

 

您可以使用QCameraInfo列出可用的相机并选择要使用的相机。

 

  QList<QCameraInfo> cameras = QCameraInfo::availableCameras();
  foreach (const QCameraInfo &cameraInfo, cameras) {
      if (cameraInfo.deviceName() == "mycamera")
          camera = new QCamera(cameraInfo);
  }

 

 

 

############################