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

View Source

Camera()

Initializes a new instance of the Camera class.

Declaration
public Camera()
Remarks

If CameraDeviceManager is supported, CameraDevice will be selected automatically by internal policy.
(User can check whether CameraDeviceManager is supported or not by using IsCameraDeviceManagerSupported.)
But, if not, this constructor will try to create Camera instance with CameraDevice0 by default.

Exceptions
Type Condition
System.InvalidOperationException

There's no available camera device. -or-
In case of any invalid operations.
System.NotSupportedException

The camera feature is not supported.
See Also
View Source

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.
Exceptions
Type Condition
System.ArgumentException

Invalid CameraDevice type.
System.InvalidOperationException

In case of any invalid operations.
System.NotSupportedException

The camera feature is not supported.

Properties

View Source

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 has already been disposed.
View Source

Capabilities

Gets the various camera capabilities.

Declaration
public CameraCapabilities Capabilities { get; }
Property Value
Type Description
CameraCapabilities
View Source

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 has already been disposed.
View Source

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 has already been disposed.
System.UnauthorizedAccessException

In case of access to the resources cannot be granted.
View Source

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 has already been disposed.
View Source

DisplaySettings

Get/set various camera display properties.

Declaration
public CameraDisplaySettings DisplaySettings { get; }
Property Value
Type Description
CameraDisplaySettings
View Source

Handle

Gets the native handle of the camera.

Declaration
public IntPtr Handle { get; }
Property Value
Type Description
System.IntPtr
View Source

Settings

Gets or sets the various camera settings.

Declaration
public CameraSettings Settings { get; }
Property Value
Type Description
CameraSettings
View Source

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 has already been disposed.

Methods

View Source

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 has already been disposed.
View Source

Dispose()

Releases all resources used by the camera.

Declaration
public void Dispose()
View Source

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.
View Source

~Camera()

Finalizes an instance of the Camera class.

Declaration
protected ~Camera()
View Source

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.
View Source

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.
View Source

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 has already been disposed.
System.UnauthorizedAccessException

In case of access to the resources cannot be granted.
View Source

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 has already been disposed.
System.UnauthorizedAccessException

In case of access to the resources cannot be granted.
See Also
System.Threading.CancellationToken
View Source

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 has already been disposed.
System.UnauthorizedAccessException

In case of access to the resources cannot be granted.
View Source

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 has already been disposed.
System.UnauthorizedAccessException

In case of access to the resources cannot be granted.
View Source

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 has already been disposed.
System.UnauthorizedAccessException

In case of access to the resources cannot be granted.
View Source

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 has already been disposed.
System.UnauthorizedAccessException

In case of access to the resources cannot be granted.
View Source

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 has already been disposed.
System.UnauthorizedAccessException

In case of access to the resources cannot be granted.
View Source

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 has already been disposed.
System.UnauthorizedAccessException

In case of access to the resources cannot be granted.

Events

View Source

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>
View Source

Capturing

An event that occurs during capture of an image.

Declaration
public event EventHandler<CameraCapturingEventArgs> Capturing
Event Type
Type Description
System.EventHandler<TEventArgs><CameraCapturingEventArgs>
View Source

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.
View Source

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>
View Source

ExtraPreview

An event that occurs once per frame when previewing.

Declaration
public event EventHandler<ExtraPreviewEventArgs> ExtraPreview
Event Type
Type Description
System.EventHandler<TEventArgs><ExtraPreviewEventArgs>
View Source

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>
View Source

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>
View Source

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.
View Source

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>
View Source

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>
View Source

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>
View Source

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>
View Source

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