Class Camera

Definition

Namespace:

Tizen.Multimedia

Assembly:

Tizen.Multimedia.Camera.dll

This camera class provides methods to capture photos and supports setting up notifications for state changes of capturing, previewing, focusing, and informing about the resolution and the binary format, and functions for picture manipulations like sepia, negative, and many more. It also notifies you when a significant picture parameter changes, (For example, focus).

public class Camera : IDisposable

Inheritance

object

Camera

Implements

System.IDisposable

Constructors

Camera(CameraDevice)

Initializes a new instance of the Camera class.

Declaration

public Camera(CameraDevice device)

Parameters

Type	Name	Description
CameraDevice	device	The camera device to access.

Properties

CameraCount

Gets the camera device count.

Declaration

public int CameraCount { get; }

Property Value

Type	Description
int	This returns 2, if the device supports primary and secondary cameras. Otherwise 1, if the device only supports primary camera.

Exceptions

Type	Condition
System.ObjectDisposedException	The camera already has been disposed of.

Capabilities

Gets the various camera capabilities.

Declaration

public CameraCapabilities Capabilities { get; }

Property Value

Type	Description
CameraCapabilities

Direction

Gets the facing direction of the camera module.

Declaration

public CameraFacingDirection Direction { get; }

Property Value

Type	Description
CameraFacingDirection	A CameraFacingDirection that specifies the facing direction of the camera device.

Exceptions

Type	Condition
System.ObjectDisposedException	The camera already has been disposed of.

Display

Sets or gets the display type and handle to show preview images. The camera must be in the Created state.

Declaration

public Display Display { get; set; }

Property Value

Type	Description
Display

Remarks

This must be set before the StartPreview() method. In custom ROI display mode, DisplayRoiArea property must be set before calling this method.

Exceptions

Type	Condition
System.InvalidOperationException	In case of any invalid operations.
System.NotSupportedException	In case of this feature is not supported.
System.ObjectDisposedException	The camera already has been disposed of.
System.UnauthorizedAccessException	In case of access to the resources cannot be granted.

DisplayReuseHint

The hint for the display reuse. If the hint is set to true, the display will be reused when the camera device is changed with the ChangeDevice method.

Declaration

public bool DisplayReuseHint { get; set; }

Property Value

Type	Description
bool

Exceptions

Type	Condition
System.ArgumentException	In case of invalid parameters.
System.InvalidOperationException	An invalid state.
System.ObjectDisposedException	The camera already has been disposed of.

DisplaySettings

Get/set various camera display properties.

Declaration

public CameraDisplaySettings DisplaySettings { get; }

Property Value

Type	Description
CameraDisplaySettings

Handle

Gets the native handle of the camera.

Declaration

public IntPtr Handle { get; }

Property Value

Type	Description
System.IntPtr

Settings

Gets or sets the various camera settings.

Declaration

public CameraSettings Settings { get; }

Property Value

Type	Description
CameraSettings

State

Gets the state of the camera.

Declaration

public CameraState State { get; }

Property Value

Type	Description
CameraState	None, Created, Preview, Capturing, Captured.

Exceptions

Type	Condition
System.ObjectDisposedException	The camera already has been disposed of.

Methods

ChangeDevice(CameraDevice)

Changes the camera device.

Declaration

public void ChangeDevice(CameraDevice device)

Parameters

Type	Name	Description
CameraDevice	device	The hardware camera to access.

Remarks

If display reuse is set using DisplayReuseHint before stopping the preview, the display will be reused and last frame on the display can be kept even though camera device is changed. The camera must be in the Created.

Exceptions

Type	Condition
System.ArgumentException	In case of invalid parameters.
System.InvalidOperationException	In case of any invalid operations.
System.NotSupportedException	In case of the ChangeDevice feature is not supported.
System.ObjectDisposedException	The camera already has been disposed of.

Dispose()

Releases all resources used by the camera.

Declaration

public void Dispose()

Dispose(bool)

Releases the unmanaged resources used by the camera.

Declaration

protected virtual void Dispose(bool disposing)

Parameters

Type	Name	Description
bool	disposing	true to release both managed and unmanaged resources; false to release only unmanaged resources.

~Camera()

Finalizes an instance of the Camera class.

Declaration

protected ~Camera()

GetDeviceState(CameraDevice)

Gets the device state.

Declaration

public static CameraDeviceState GetDeviceState(CameraDevice device)

Parameters

Type	Name	Description
CameraDevice	device	The device to get the state.

Returns

Type	Description
CameraDeviceState	Returns the state of the camera device.

Exceptions

Type	Condition
System.ArgumentException	In case of invalid parameters.
System.InvalidOperationException	In case of any invalid operations.
System.NotSupportedException	In case of this feature is not supported.

GetFlashState(CameraDevice)

Gets the flash state.

Declaration

public static CameraFlashState GetFlashState(CameraDevice device)

Parameters

Type	Name	Description
CameraDevice	device	The device to get the state.

Returns

Type	Description
CameraFlashState	Returns the flash state of the camera device.

Exceptions

Type	Condition
System.ArgumentException	In case of invalid parameters.
System.InvalidOperationException	In case of any invalid operations.
System.NotSupportedException	In case of this feature is not supported.

StartCapture()

Starts capturing of still images. EventHandler must be set for capturing using Capturing and for completed using CaptureCompleted before calling this method. The camera must be in the Preview state.

Declaration

public void StartCapture()

Remarks

This function causes the transition of the camera state from capturing to captured automatically and the corresponding EventHandlers will be invoked. The preview should be restarted by calling the StartPreview() method after capture is completed.

Exceptions

Type	Condition
System.InvalidOperationException	In case of any invalid operations.
System.NotSupportedException	In case of this feature is not supported.
System.ObjectDisposedException	The camera already has been disposed of.
System.UnauthorizedAccessException	In case of access to the resources cannot be granted.

StartCapture(int, int, CancellationToken)

Starts continuously capturing still images. EventHandler must be set for capturing using Capturing and for completed using CaptureCompleted before calling this method. The camera must be in the Preview state.

Declaration

public void StartCapture(int count, int interval, CancellationToken cancellationToken)

Parameters

Type	Name	Description
int	count	The number of still images.
int	interval	The interval of the capture(milliseconds).
System.Threading.CancellationToken	cancellationToken	The cancellation token to cancel capturing.

Remarks

If this is not supported, zero shutter lag occurs. The capture resolution could be changed to the preview resolution. This function causes the transition of the camera state from capturing to captured automatically and the corresponding Eventhandlers will be invoked. Each captured image will be delivered through Eventhandler set using the Capturing event. The preview should be restarted by calling the StartPreview() method after capture is completed.

Exceptions

Type	Condition
System.ArgumentOutOfRangeException	In case of invalid parameters.
System.InvalidOperationException	In case of any invalid operations.
System.NotSupportedException	In case of this feature is not supported.
System.ObjectDisposedException	The camera already has been disposed of.
System.UnauthorizedAccessException	In case of access to the resources cannot be granted.

See Also

System.Threading.CancellationToken

StartFaceDetection()

Starts face detection. The camera must be in the Preview state.

Declaration

public void StartFaceDetection()

Remarks

This should be called after StartPreview() is started. The Eventhandler set using FaceDetected is invoked when the face is detected in the preview frame. Internally, it starts continuously focus and focusing on the detected face.

Exceptions

Type	Condition
System.InvalidOperationException	In case of any invalid operations.
System.NotSupportedException	In case of this feature is not supported.
System.ObjectDisposedException	The camera already has been disposed of.
System.UnauthorizedAccessException	In case of access to the resources cannot be granted.

StartFocusing(bool)

Starts camera auto-focusing, asynchronously. The camera must be in the Preview or the Captured state.

Declaration

public void StartFocusing(bool continuous)

Parameters

Type	Name	Description
bool	continuous	Continuous auto focus.

Remarks

If continuous status is true, the camera continuously tries to focus.

Exceptions

Type	Condition
System.ArgumentException	In case of invalid parameters.
System.InvalidOperationException	In case of any invalid operations.
System.NotSupportedException	In case of this feature is not supported.
System.ObjectDisposedException	The camera already has been disposed of.
System.UnauthorizedAccessException	In case of access to the resources cannot be granted.

StartPreview()

Starts capturing and drawing preview frames on the screen. The display property must be set using Display before using this method. If needed set fps PreviewFps, preview resolution PreviewResolution, or preview format PreviewPixelFormat before using this method. The camera must be in the Created or the Captured state.

Declaration

public void StartPreview()

Exceptions

Type	Condition
System.InvalidOperationException	In case of any invalid operations.
System.NotSupportedException	In case of this feature is not supported.
System.ObjectDisposedException	The camera already has been disposed of.
System.UnauthorizedAccessException	In case of access to the resources cannot be granted.

StopFaceDetection()

Stops face detection.

Declaration

public void StopFaceDetection()

Exceptions

Type	Condition
System.InvalidOperationException	In case of any invalid operations.
System.NotSupportedException	In case of this feature is not supported.
System.ObjectDisposedException	The camera already has been disposed of.
System.UnauthorizedAccessException	In case of access to the resources cannot be granted.

StopFocusing()

Stops camera auto focusing. The camera must be in the Preview or the Captured state.

Declaration

public void StopFocusing()

Exceptions

Type	Condition
System.InvalidOperationException	In case of any invalid operations.
System.NotSupportedException	In case of this feature is not supported.
System.ObjectDisposedException	The camera already has been disposed of.
System.UnauthorizedAccessException	In case of access to the resources cannot be granted.

StopPreview()

Stops capturing and drawing preview frames on the screen. The camera must be in the Preview state.

Declaration

public void StopPreview()

Exceptions

Type	Condition
System.InvalidOperationException	In case of any invalid operations.
System.NotSupportedException	In case of this feature is not supported.
System.ObjectDisposedException	The camera already has been disposed of.
System.UnauthorizedAccessException	In case of access to the resources cannot be granted.

Events

CaptureCompleted

An event that occurs after the capture of the image.

Declaration

public event EventHandler<EventArgs> CaptureCompleted

Event Type

Type	Description
System.EventHandler<TEventArgs><System.EventArgs>

Capturing

An event that occurs during capture of an image.

Declaration

public event EventHandler<CameraCapturingEventArgs> Capturing

Event Type

Type	Description
System.EventHandler<TEventArgs><CameraCapturingEventArgs>

DeviceStateChanged

An event that occurs after the CameraDeviceState is changed.

Declaration

public static event EventHandler<CameraDeviceStateChangedEventArgs> DeviceStateChanged

Event Type

Type	Description
System.EventHandler<TEventArgs><CameraDeviceStateChangedEventArgs>

Exceptions

Type	Condition
System.InvalidOperationException	In case of any invalid operations.
System.NotSupportedException	In case of this feature is not supported.
System.ArgumentException	In case of invalid parameters.

ErrorOccurred

An event that occurs when there is an asynchronous error.

Declaration

public event EventHandler<CameraErrorOccurredEventArgs> ErrorOccurred

Event Type

Type	Description
System.EventHandler<TEventArgs><CameraErrorOccurredEventArgs>

FaceDetected

An event that occurs when a face is detected in the preview frame.

Declaration

public event EventHandler<FaceDetectedEventArgs> FaceDetected

Event Type

Type	Description
System.EventHandler<TEventArgs><FaceDetectedEventArgs>

FocusStateChanged

An event that occurs when the auto focus state is changed.

Declaration

public event EventHandler<CameraFocusStateChangedEventArgs> FocusStateChanged

Event Type

Type	Description
System.EventHandler<TEventArgs><CameraFocusStateChangedEventArgs>

HdrCaptureProgress

An event that occurs when there is a change in the HDR capture progress. Checks whether the IsHdrCaptureSupported is supported or not before adding this EventHandler.

Declaration

public event EventHandler<HdrCaptureProgressEventArgs> HdrCaptureProgress

Event Type

Type	Description
System.EventHandler<TEventArgs><HdrCaptureProgressEventArgs>

Exceptions

Type	Condition
System.NotSupportedException	In case of HDR feature is not supported.

Interrupted

An event that occurs when an camera is interrupted by the policy.

Declaration

public event EventHandler<CameraInterruptedEventArgs> Interrupted

Event Type

Type	Description
System.EventHandler<TEventArgs><CameraInterruptedEventArgs>

InterruptStarted

An event that occurs when the camera interrupt is started by the policy.

Declaration

public event EventHandler<CameraInterruptStartedEventArgs> InterruptStarted

Event Type

Type	Description
System.EventHandler<TEventArgs><CameraInterruptStartedEventArgs>

MediaPacketPreview

An event that occurs once per frame when previewing. Preview callback is registered when an user adds a callback explicitly to avoid useless P/Invoke.

Declaration

public event EventHandler<MediaPacketPreviewEventArgs> MediaPacketPreview

Event Type

Type	Description
System.EventHandler<TEventArgs><MediaPacketPreviewEventArgs>

Preview

An event that occurs once per frame when previewing. Preview callback is registered when an user adds a callback explicitly to avoid useless P/Invoke.

Declaration

public event EventHandler<PreviewEventArgs> Preview

Event Type

Type	Description
System.EventHandler<TEventArgs><PreviewEventArgs>

StateChanged

An event that occurs when the camera state is changed.

Declaration

public event EventHandler<CameraStateChangedEventArgs> StateChanged

Event Type

Type	Description
System.EventHandler<TEventArgs><CameraStateChangedEventArgs>

Implements

System.IDisposable