CCamera Class Reference

class CCamera : public CBase

Base class for camera devices.

Provides the interface that an application uses to control, and acquire images from, the camera.

An application must supply an implementation of MCameraObserver2 (or MCameraObserver).

Inherits from

CCamera
- CBase

Nested Classes and Structures

CCamera::CCameraImageProcessing

Public Member Functions
TInt	Brightness()
TInt	BuffersInUse()
void	CameraInfo(TCameraInfo &)
IMPORT_C TInt	CameraVersion()
IMPORT_C TInt	CamerasAvailable()
void	CancelCaptureImage()
void	CaptureImage()
TInt	Contrast()
TAny *	CustomInterface(TUid)
TInt	DigitalZoomFactor()
void	EnumerateCaptureSizes(TSize &, TInt, TFormat)
void	EnumerateVideoFrameRates(TReal32 &, TInt, TFormat, TInt, TExposure)
void	EnumerateVideoFrameSizes(TSize &, TInt, TFormat)
TExposure	Exposure()
TFlash	Flash()
TReal32	FrameRate()
TInt	FramesPerBuffer()
void	GetFrameSize(TSize &)
TInt	Handle()
TInt	JpegQuality()
IMPORT_C CCamera *	New2L(MCameraObserver2 &, TInt, TInt)
IMPORT_C CCamera *	NewDuplicate2L(MCameraObserver2 &, TInt)
IMPORT_C CCamera *	NewDuplicateL(MCameraObserver2 &, TInt)
IMPORT_C CCamera *	NewDuplicateL(MCameraObserver &, TInt)
IMPORT_C CCamera *	NewL(MCameraObserver2 &, TInt, TInt)
IMPORT_C CCamera *	NewL(MCameraObserver &, TInt)
void	PowerOff()
void	PowerOn()
void	PrepareImageCaptureL(TFormat, TInt)
void	PrepareImageCaptureL(TFormat, TInt, const TRect &)
void	PrepareVideoCaptureL(TFormat, TInt, TInt, TInt, TInt)
void	PrepareVideoCaptureL(TFormat, TInt, TInt, TInt, TInt, const TRect &)
void	Release()
void	Reserve()
void	SetBrightnessL(TInt)
void	SetContrastL(TInt)
void	SetDigitalZoomFactorL(TInt)
void	SetExposureL(TExposure)
void	SetFlashL(TFlash)
void	SetJpegQuality(TInt)
void	SetViewFinderMirrorL(TBool)
void	SetWhiteBalanceL(TWhiteBalance)
void	SetZoomFactorL(TInt)
void	StartVideoCapture()
void	StartViewFinderBitmapsL(TSize &)
void	StartViewFinderBitmapsL(TSize &, TRect &)
void	StartViewFinderDirectL(RWsSession &, CWsScreenDevice &, RWindowBase &, TRect &)
void	StartViewFinderDirectL(RWsSession &, CWsScreenDevice &, RWindowBase &, TRect &, TRect &)
void	StartViewFinderL(TFormat, TSize &)
void	StartViewFinderL(TFormat, TSize &, TRect &)
void	StopVideoCapture()
void	StopViewFinder()
TBool	VideoCaptureActive()
TBool	ViewFinderActive()
TBool	ViewFinderMirror()
TWhiteBalance	WhiteBalance()
TInt	ZoomFactor()

Private Member Functions
	CCamera()

Inherited Functions
	CBase::CBase()
	CBase::Delete(CBase *)
	CBase::Extension_(TUint,TAny &,TAny )
	CBase::operator new(TUint)
	CBase::operator new(TUint,TAny *)
	CBase::operator new(TUint,TLeave)
	CBase::operator new(TUint,TLeave,TUint)
	CBase::operator new(TUint,TUint)
	CBase::~CBase()

Public Member Enumerations
enum	TBrightness { EBrightnessAuto = KMinTInt }
enum	TContrast { EContrastAuto = KMinTInt }
enum	TExposure { EExposureAuto = 0x0000, EExposureNight = 0x0001, EExposureBacklight = 0x0002, EExposureCenter = 0x0004, EExposureSport = 0x0008, EExposureVeryLong = 0x0010, EExposureSnow = 0x0020, EExposureBeach = 0x0040, EExposureProgram = 0x0080, EExposureAperturePriority = 0x0100, EExposureShutterPriority = 0x0200, EExposureManual = 0x0400, EExposureSuperNight = 0x0800, EExposureInfra = 0x1000 }
enum	TFlash { EFlashNone = 0x0000, EFlashAuto = 0x0001, EFlashForced = 0x0002, EFlashFillIn = 0x0004, EFlashRedEyeReduce = 0x0008, EFlashSlowFrontSync = 0x0010, EFlashSlowRearSync = 0x0020, EFlashManual = 0x0040, EFlashVideoLight = 0x0080 }
enum	TFormat { EFormatMonochrome = 0x0001, EFormat16bitRGB444 = 0x0002, EFormat16BitRGB565 = 0x0004, EFormat32BitRGB888 = 0x0008, EFormatJpeg = 0x0010, EFormatExif = 0x0020, EFormatFbsBitmapColor4K = 0x0040, EFormatFbsBitmapColor64K = 0x0080, EFormatFbsBitmapColor16M = 0x0100, EFormatUserDefined = 0x0200, EFormatYUV420Interleaved = 0x0400, EFormatYUV420Planar = 0x0800, EFormatYUV422 = 0x1000, EFormatYUV422Reversed = 0x2000, EFormatYUV444 = 0x4000, EFormatYUV420SemiPlanar = 0x8000, EFormatFbsBitmapColor16MU = 0x00010000, EFormatMJPEG = 0x00020000, EFormatEncodedH264 = 0x00040000, EFormatYUV222ReversedV2 = 0x00080000 }
enum	TWhiteBalance { EWBAuto = 0x0000, EWBDaylight = 0x0001, EWBCloudy = 0x0002, EWBTungsten = 0x0004, EWBFluorescent = 0x0008, EWBFlash = 0x0010, EWBSnow = 0x0020, EWBBeach = 0x0040, EWBManual = 0x0080, EWBShade = 0x0100, EWBAutoSkin = 0x0200, EWBHorizon = 0x0400, EWBDaylightUnderWater = 0x0800 }

Constructor & Destructor Documentation

CCamera()

IMPORT_C

CCamera

(

)

[private]

Default Constructor

Prevents implementers from deriving from CCamera. Implementation requires derivation from CCameraPlugin instead.

Member Functions Documentation

Brightness()

TInt

Brightness

(

)

const [pure virtual]

Gets the currently set brightness adjustment value.

The currently set brightness adjustment value.

BuffersInUse()

TInt

BuffersInUse

(

)

const [pure virtual]

Gets the number of buffers currently in use.

The number of buffers currently in use.

CameraInfo(TCameraInfo &)

void

CameraInfo

(

TCameraInfo &

aInfo

)

const [pure virtual]

Gets information about the camera device.

Parameters

TCameraInfo & aInfo

On return, information about the camera device. See TCameraInfo.

CameraVersion()

IMPORT_C TInt

CameraVersion

(

)

Returns the camera API version no.

CamerasAvailable()

IMPORT_C TInt

CamerasAvailable

(

)

[static]

Determines the number of cameras on the device.

Count of cameras present on the device.

CancelCaptureImage()

void

CancelCaptureImage

(

)

[pure virtual]

Cancels the asynchronous still image capture.

CCamera::CCameraImageCapture

CaptureImage()

void

CaptureImage

(

)

[pure virtual]

Asynchronously performs still image capture.

Calls MCameraObserver::ImageReady() when complete.

CCamera::CCameraImageCapture

CCamera::CCameraPreImageCaptureControl

Contrast()

TInt

Contrast

(

)

const [pure virtual]

Gets the currently set contrast value.

The currently set contrast value.

CustomInterface(TUid)

TAny *

CustomInterface

(

TUid

aInterface

)

[pure virtual]

Gets a custom interface. The client has to cast the returned pointer to the appropriate type.

Custom interface pointer. NULL if the requested interface is not supported.

Parameters

TUid aInterface

The Uid of the particular interface function required.

DigitalZoomFactor()

TInt

DigitalZoomFactor

(

)

const [pure virtual]

Gets the currently set digital zoom factor.

The currently set digital zoom factor.

EnumerateCaptureSizes(TSize &, TInt, TFormat)

void	EnumerateCaptureSizes	(	TSize &	aSize,
			TInt	aSizeIndex,
			TFormat	aFormat
		)	const [pure virtual]

Enumerates through the available image capture sizes, based on the specified size index and format

The size index must be in the range 0 to TCameraInfo::iNumImageSizesSupported-1 inclusive.

Parameters

TSize & aSize	Image size.
TInt aSizeIndex	Size index.
TFormat aFormat	The image format.

EnumerateVideoFrameRates(TReal32 &, TInt, TFormat, TInt, TExposure)

void	EnumerateVideoFrameRates	(	TReal32 &	aRate,
			TInt	aRateIndex,
			TFormat	aFormat,
			TInt	aSizeIndex,
			TExposure	aExposure = EExposureAuto
		)	const [pure virtual]

Enumerates through the available video frame rates, based on the specified rate index, video frame format, size index and exposure mode.

Parameters

TReal32 & aRate	On return, the available video frame rates. Some rates may not be available due to, for example, current flash mode setting. In those cases a rate of 0 will be returned. Rates should be returned in order, highest first, so clients do not have to iterate through every one.
TInt aRateIndex	The rate index. Must be in the range 0 to TCameraInfo::iNumVideoFrameRatesSupported-1 inclusive.
TFormat aFormat	The format.
TInt aSizeIndex	The size index.
TExposure aExposure = EExposureAuto	The exposure mode.

EnumerateVideoFrameSizes(TSize &, TInt, TFormat)

void	EnumerateVideoFrameSizes	(	TSize &	aSize,
			TInt	aSizeIndex,
			TFormat	aFormat
		)	const [pure virtual]

Enumerates through the available video frame sizes, based on the specified size index and format.

Parameters

TSize & aSize	On return the available video frame sizes. Sizes should be returned in order, largest first, so clients do not have to iterate through every one.
TInt aSizeIndex	Size index. Must be in the range 0 to TCameraInfo::iNumVideoFrameSizesSupported-1 inclusive
TFormat aFormat	Image format.

Exposure()

TExposure

Exposure

(

)

const [pure virtual]

Gets the currently set exposure setting value.

The currently set exposure setting value.

Flash()

TFlash

Flash

(

)

const [pure virtual]

Gets the currently set flash mode.

The currently set flash mode.

Note:

if CCamera::New2L() or CCamera::NewDuplicate2L() is not used to create CCamera object, it is assumed that application is not prepared to receive extra added enum values (unrecognised). So, any extra enum value(unrecognised) (set in the ECAM implementation because of sharing clients) should not be returned from the ECAM implementation. To receive extra added enum values, application should rather use CCamera::New2L() or CCamera::NewDuplicate2L() to create camera object. ECAM implementation, after verifying this,(by checking version no.) may send new values, if set. In this case, application is assumed to be prepared to receive unrecognised enum values.

CCamera::CCameraAdvancedSettings::FlashMode()

FrameRate()

TReal32

FrameRate

(

)

const [pure virtual]

Gets the frame rate currently in use.

The frame rate currently in use.

FramesPerBuffer()

TInt

FramesPerBuffer

(

)

const [pure virtual]

Gets the number of frames per buffer currently in use.

The number of frames per buffer currently in use.

GetFrameSize(TSize &)

void

GetFrameSize

(

TSize &

aSize

)

const [pure virtual]

Gets the frame size currently in use.

Parameters

TSize & aSize

The frame size currently in use.

Handle()

TInt

Handle

(

)

[pure virtual]

Gets the device-unique handle of this camera object.

The device-unique handle of this camera object.

JpegQuality()

TInt

JpegQuality

(

)

const [pure virtual]

Gets the currently set jpeg quality value.

Returns 0 if not supported.

The currently set jpeg quality value.

CCamera::CCameraPreImageCaptureControl::GetImageMaxMemorySizeL(TUint& aMemorySize)

New2L(MCameraObserver2 &, TInt, TInt)

IMPORT_C CCamera *	New2L	(	MCameraObserver2 &	aObserver,
			TInt	aCameraIndex,
			TInt	aPriority
		)	[static]

Creates an object representing a camera. Clients prepare themselves to receive unrecognised enum, uids etc.

Pointer to a fully constructed CCamera object. Ownership is passed to the caller.

leave

KErrNoMemory if out of memory.

leave

KErrNotSupported if aCameraIndex is out of range.

leave

KErrPermissionDenied if the application does not have the UserEnvironment capability.

capability

UserEnvironment An application that creates a CCamera object must have the UserEnvironment capability.

capability

MultimediaDD A process requesting or using this method that has MultimediaDD capability will always have precedence over a process that does not have MultimediaDD.

Note:

Clients using this creation method should prepare themselves to receive any unrecognised enum values, uids from 'supported' or 'getter' methods

Parameters

MCameraObserver2 & aObserver	Reference to class derived from MCameraObserver2 designed to receive notification of asynchronous event completion.
TInt aCameraIndex	Index from 0 to CamerasAvailable()-1 inclusive specifying the camera device to use.
TInt aPriority	Value from -100 to 100 indicating relative priority of client to use camera.

NewDuplicate2L(MCameraObserver2 &, TInt)

IMPORT_C CCamera *	NewDuplicate2L	(	MCameraObserver2 &	aObserver,
			TInt	aCameraHandle
		)	[static]

Duplicates the original camera object for use by, for example, multimedia systems. Clients prepare themselves to receive unrecognised enum, uids etc.

May leave with KErrNoMemory or KErrNotFound if aCameraHandle is not valid.

leave

KErrNoMemory if out of memory.

leave

KErrNotFound if aCameraHandle is not valid.

leave

KErrPermissionDenied if the application does not have the UserEnvironment capability.

Duplicate of the original camera object.

capability

UserEnvironment An application that creates a CCamera object must have the UserEnvironment capability.

Note:

Clients using this creation method should prepare themselves to receive any unrecognised enum values, uids from 'supported' or 'getter' methods

Parameters

MCameraObserver2 & aObserver	Reference to an observer.
TInt aCameraHandle	Handle of an existing camera object.

NewDuplicateL(MCameraObserver2 &, TInt)

IMPORT_C CCamera *	NewDuplicateL	(	MCameraObserver2 &	aObserver,
			TInt	aCameraHandle
		)	[static]

Use static CCamera* NewDuplicate2L(MCameraObserver2& aObserver,TInt aCameraHandle);

Duplicates the original camera object for use by, for example, multimedia systems.

May leave with KErrNoMemory or KErrNotFound if aCameraHandle is not valid.

leave

KErrNoMemory if out of memory.

leave

KErrNotFound if aCameraHandle is not valid.

leave

KErrPermissionDenied if the application does not have the UserEnvironment capability.

Duplicate of the original camera object.

capability

UserEnvironment An application that creates a CCamera object must have the UserEnvironment capability.

Note:

Applications using this method to create camera object may not receive enums/uids added in future(after being baselined). To receive them, they should rather use New2L() or NewDuplicate2L(), in which case, they should prepare themselves to receive unrecognised values.

Parameters

MCameraObserver2 & aObserver	Reference to an observer.
TInt aCameraHandle	Handle of an existing camera object.

NewDuplicateL(MCameraObserver &, TInt)

IMPORT_C CCamera *	NewDuplicateL	(	MCameraObserver &	aObserver,
			TInt	aCameraHandle
		)	[static]

Duplicates the original camera object for use by, for example, multimedia systems.

leave

KErrNoMemory if out of memory.

leave

KErrNotFound if aCameraHandle is not valid.

leave

KErrPermissionDenied if the application does not have the UserEnvironment capability.

Duplicate of the original camera object.

capability

UserEnvironment An application that creates a CCamera object must have the UserEnvironment capability.

Note:

Parameters

MCameraObserver & aObserver	Reference to an observer.
TInt aCameraHandle	Handle of an existing camera object.

NewL(MCameraObserver2 &, TInt, TInt)

IMPORT_C CCamera *	NewL	(	MCameraObserver2 &	aObserver,
			TInt	aCameraIndex,
			TInt	aPriority
		)	[static]

Use static CCamera* New2L(MCameraObserver2& aObserver,TInt aCameraIndex,TInt aPriority);

Creates an object representing a camera.

Pointer to a fully constructed CCamera object. Ownership is passed to the caller.

leave

KErrNoMemory if out of memory.

leave

KErrNotSupported if aCameraIndex is out of range.

leave

KErrPermissionDenied if the application does not have the UserEnvironment capability.

capability

UserEnvironment An application that creates a CCamera object must have the UserEnvironment capability.

capability

MultimediaDD A process requesting or using this method that has MultimediaDD capability will always have precedence over a process that does not have MultimediaDD.

Note:

Parameters

MCameraObserver2 & aObserver	Reference to class derived from MCameraObserver2 designed to receive notification of asynchronous event completion.
TInt aCameraIndex	Index from 0 to CamerasAvailable()-1 inclusive specifying the camera device to use.
TInt aPriority	Value from -100 to 100 indicating relative priority of client to use camera.

NewL(MCameraObserver &, TInt)

IMPORT_C CCamera *	NewL	(	MCameraObserver &	aObserver,
			TInt	aCameraIndex
		)	[static]

Creates an object representing a camera.

leave

KErrNoMemory if out of memory.

leave

KErrNotSupported if aCameraIndex is out of range.

leave

KErrPermissionDenied if the application does not have the UserEnvironment capability.

Pointer to a fully constructed CCamera object. Ownership is passed to the caller.

capability

UserEnvironment An application that creates a CCamera object must have the UserEnvironment capability.

Note:

Parameters

MCameraObserver & aObserver	Reference to class derived from MCameraObserver designed to receive notification of asynchronous event completion.
TInt aCameraIndex	Index from 0 to CamerasAvailable()-1 inclusive specifying the camera device to use.

PowerOff()

void

PowerOff

(

)

[pure virtual]

Synchronous function for switching off camera power.

PowerOn()

void

PowerOn

(

)

[pure virtual]

Asynchronous method to switch on camera power.

User must have successfully called Reserve() prior to calling this function.

Calls MCameraObserver::PowerOnComplete() when power on is complete.

PrepareImageCaptureL(TFormat, TInt)

void	PrepareImageCaptureL	(	TFormat	aImageFormat,
			TInt	aSizeIndex
		)	[pure virtual]

Performs setup and allocation of memory.

Called prior to calling CaptureImage() to keep the latency of that function to a minimum.

Needs to be called only once for multiple CaptureImage() calls. May leave with KErrNotSupported or KErrNoMemory or KErrInUse or KErrNotReady.

The specified image format must be one of the formats supported (see TCameraInfo::iImageFormatsSupported).

The specified size index must be in the range of 0 to TCameraInfo::iNumImageSizesSupported-1 inclusive.

leave

KErrNotSupported

leave

KErrNoMemory

leave

KErrNotReady if PowerOn() hasn't been called successfully.

Note:

Depending on the ECAM implementation and underlying hardware, preparing both image capture and video capture at the same time may not be possible. In this case, the recommendation is to unprepare video capture before preparing image capture if PrepareVideoCaptureL() has already been called.

CCamera::CCameraPreImageCaptureControl::PrepareImageCapture(TPrepareImageParameters aPrepareImageParameters)

Parameters

TFormat aImageFormat	The image format.
TInt aSizeIndex	Size index.

PrepareImageCaptureL(TFormat, TInt, const TRect &)

void	PrepareImageCaptureL	(	TFormat	aImageFormat,
			TInt	aSizeIndex,
			const TRect &	aClipRect
		)	[pure virtual]

Performs setup and allocation of memory and clips the image to the specified rectangle.

No effect unless TCameraInfo::iImageClippingSupported is set to ETrue. The image captured is the intersection of aClipRect and the rectangle from (0,0) to aSize. Needs to be called only once for multiple CaptureImage() calls. May leave with KErrNotSupported or KErrNoMemory.

The specified image format must be one of the formats supported (see TCameraInfo::iImageFormatsSupported).

The specified size index must be in the range of 0 to TCameraInfo::iNumImageSizesSupported-1 inclusive.

leave

KErrNotSupported

leave

KErrNoMemory

leave

KErrInUse if Reserve() hasn't been called successfully

leave

KErrNotReady if PowerOn() hasn't been called successfully.

Note:

CCamera::CCameraPreImageCaptureControl::PrepareImageCapture(TPrepareImageParameters aPrepareImageParameters)

Parameters

TFormat aImageFormat	The image format.
TInt aSizeIndex	Size index.
const TRect & aClipRect	The rectangle to which the image is to be clipped.

PrepareVideoCaptureL(TFormat, TInt, TInt, TInt, TInt)

void	PrepareVideoCaptureL	(	TFormat	aFormat,
			TInt	aSizeIndex,
			TInt	aRateIndex,
			TInt	aBuffersToUse,
			TInt	aFramesPerBuffer
		)	[pure virtual]

Prepares for video capture.

Performs setup and allocation of memory prior to calling StartVideoCapture() to keep the latency of that function to a minimum.

May leave with KErrNotSupported or KErrNoMemory.

leave

May leave with KErrNotSupported, KErrNoMemory, or KErrNotReady if PowerOn() hasn't been called successfully.

Note:

Depending on the ECAM implementation and underlying hardware, preparing both image capture and video capture at the same time may not be possible. In this case, the recommendation is to unprepare image capture before preparing video capture if PrepareImageCaptureL() has already been called.

CCamera::CCameraVideoCaptureControl::PrepareVideoCapture(const TPrepareVideoParameters& aPrepareVideoParameters)

Parameters

TFormat aFormat	Format must be one of the video frame formats supported (see TCameraInfo::iVideoFrameFormatsSupported).
TInt aSizeIndex	Size index must be in the range 0 to TCameraInfo::iNumVideoFrameSizesSupported-1 inclusive.
TInt aRateIndex	The rate must be in the range 0 to TCameraInfo::iNumVideoFrameRatesSupported-1 inclusive.
TInt aBuffersToUse	The number of discrete buffers to use.
TInt aFramesPerBuffer	How large the buffers are to be. Must be less than or equal to TCameraInfo::iMaxFramesPerBufferSupported. One buffer is returned to MCameraObserver::FrameBufferReady() at a time.

PrepareVideoCaptureL(TFormat, TInt, TInt, TInt, TInt, const TRect &)

void	PrepareVideoCaptureL	(	TFormat	aFormat,
			TInt	aSizeIndex,
			TInt	aRateIndex,
			TInt	aBuffersToUse,
			TInt	aFramesPerBuffer,
			const TRect &	aClipRect
		)	[pure virtual]

Prepares for video capture and clips the frames to the given rectangle.

Performs setup and allocation of memory prior to calling StartVideoCapture() to keep the latency of that function to a minimum.

May leave with KErrNotSupported or KErrNoMemory.

leave

KErrNotSupported

leave

KErrNoMemory,

leave

KErrInUse if Reserve() hasn't been called successfully

leave

KErrNotReady if PowerOn() hasn't been called successfully.

Note:

Depending on the ECAM implementation and underlying hardware, preparing both image capture and video capture at the same time may not be possible. In this case, the recommendation is to unprepare image capture before preparing video capture if PrepareImageCaptureL() has already been called.

CCamera::CCameraVideoCaptureControl::PrepareVideoCapture(const TPrepareVideoParameters& aPrepareVideoParameters)

Parameters

TFormat aFormat	Format must be one of the video frame formats supported (see TCameraInfo::iVideoFrameFormatsSupported).
TInt aSizeIndex	Size index must be in the range 0 to TCameraInfo::iNumVideoFrameSizesSupported-1 inclusive.
TInt aRateIndex	The rate must be in the range 0 to TCameraInfo::iNumVideoFrameRatesSupported-1 inclusive.
TInt aBuffersToUse	The number of discrete buffers to use.
TInt aFramesPerBuffer	How large the buffers are to be. Must be less than or equal to TCameraInfo::iMaxFramesPerBufferSupported. One buffer is returned to MCameraObserver::FrameBufferReady() at a time.
const TRect & aClipRect	The rectangle to which the image is to be clipped.

Release()

void

Release

(

)

[pure virtual]

De-initialises the camera, allowing it to be used by other clients.

Reserve()

void

Reserve

(

)

[pure virtual]

Asynchronous function that performs any required initialisation and reserves the camera for exclusive use.

Calls MCameraObserver:: ReserveComplete() when complete.

SetBrightnessL(TInt)

void

SetBrightnessL

(

TInt

aBrightness

)

[pure virtual]

Sets the brightness adjustment of the device.

No effect if this is not supported, see TCameraInfo::iBrightnessSupported.

This must be in the range of -100 to +100 or EBrightnessAuto. May leave with KErrNotSupported if the brightness adjustment is out of range.

Parameters

TInt aBrightness

The required brightness adjustment.

SetContrastL(TInt)

void

SetContrastL

(

TInt

aContrast

)

[pure virtual]

Sets the contrast adjustment of the device.

This must be in the range of -100 to +100 or EContrastAuto. May leave with KErrNotSupported if the specified contrast value is out of range.

Parameters

TInt aContrast

Required contrast value. See TCameraInfo::iContrastSupported

SetDigitalZoomFactorL(TInt)

void

SetDigitalZoomFactorL

(

TInt

aDigitalZoomFactor = 0

)

[pure virtual]

Sets the digital zoom factor.

This must be in the range of 0 to TCameraInfo::iMaxDigitalZoom inclusive.

May leave with KErrNotSupported if the zoom factor is out of range.

Parameters

TInt aDigitalZoomFactor = 0

The required digital zoom factor.

SetExposureL(TExposure)

void

SetExposureL

(

TExposure

aExposure = EExposureAuto

)

[pure virtual]

Sets the exposure adjustment of the device.

No effect if this is not supported, see CameraInfo::iExposureModesSupported.

May leave with KErrNotSupported if the specified exposure adjustment is invalid.

Parameters

TExposure aExposure = EExposureAuto

The required exposure adjustment.

SetFlashL(TFlash)

void

SetFlashL

(

TFlash

aFlash = EFlashNone

)

[pure virtual]

Sets the flash mode.

No effect if this is not supported, see TCameraInfo::iFlashModesSupported.

May leave with KErrNotSupported if the specified flash mode is invalid.

Parameters

TFlash aFlash = EFlashNone

The required flash mode.

SetJpegQuality(TInt)

void

SetJpegQuality

(

TInt

aQuality

)

[pure virtual]

Sets the quality value to use if jpeg is a supported image for video format.

Ignored if jpeg is not a supported image for video format.

CCamera::CCameraPreImageCaptureControl::TPrepareImageParameters::iImageMaxMemorySize

Parameters

TInt aQuality

The quality value to use, clamped to the range 1 to 100.

SetViewFinderMirrorL(TBool)

void

SetViewFinderMirrorL

(

TBool

aMirror

)

[pure virtual]

Sets whether view finder mirroring is on.

Used to switch between what the camera sees and what you would see if the device were a mirror.

leave

KErrNotSupported.

Note:

This method is assumed to be meant for default display only. KECamDefaultViewFinderHandle should be used to refer viewfinders started using CCamera methods.

CCamera::CCameraV2DirectViewFinder

CCamera::CCameraClientViewFinder

Parameters

TBool aMirror

ETrue to set mirroring on, EFalse to set mirroring off.

SetWhiteBalanceL(TWhiteBalance)

void

SetWhiteBalanceL

(

TWhiteBalance

aWhiteBalance = EWBAuto

)

[pure virtual]

Sets the white balance adjustment of the device.

No effect if this is not supported, see TCameraInfo::iWhiteBalanceModesSupported.

leave

KErrNotSupported if the specified white balance adjustment is invalid.

Parameters

TWhiteBalance aWhiteBalance = EWBAuto

The required white balance adjustment.

SetZoomFactorL(TInt)

void

SetZoomFactorL

(

TInt

aZoomFactor = 0

)

[pure virtual]

Sets the zoom factor.

This must be in the range of TCameraInfo::iMinZoom to TCameraInfo::iMaxZoom inclusive. May leave with KErrNotSupported if the specified zoom factor is out of range.

Parameters

TInt aZoomFactor = 0

Required zoom factor.

StartVideoCapture()

void

StartVideoCapture

(

)

[pure virtual]

Starts capturing video.

Calls MCameraObserver::FrameBufferReady() when each buffer has been filled with the required number of frames, as set by PrepareVideoCaptureL().

StartViewFinderBitmapsL(TSize &)

void

StartViewFinderBitmapsL

(

TSize &

aSize

)

[pure virtual]

Starts transfer of view finder data.

Bitmaps are returned by MCameraObserver::ViewFinderFrameReady().

leave

KErrNotReady if PowerOn() has not been called, or has not yet completed.

Note:

This method is assumed to be meant for default display only.

CCamera::CCameraClientViewFinder

Parameters

TSize & aSize

On return, the size used.

StartViewFinderBitmapsL(TSize &, TRect &)

void	StartViewFinderBitmapsL	(	TSize &	aSize,
			TRect &	aClipRect
		)	[pure virtual]

Starts transfer of view finder data and clips the bitmap to the specified clip rectangle.

The bitmap is the size of the intersection of aSize and aClipRect, not simply aSize padded with white space.

leave

KErrInUse if Reserve() hasn't been called successfully.

leave

KErrNotReady if PowerOn() hasn't been called successfully.

Note:

This method is assumed to be meant for default display only.

CCamera::CCameraClientViewFinder

Parameters

TSize & aSize	On return, the size used.
TRect & aClipRect	Required clip rectangle. May be modified if, for example, the camera only supports certain byte alignments.

StartViewFinderDirectL(RWsSession &, CWsScreenDevice &, RWindowBase &, TRect &)

void	StartViewFinderDirectL	(	RWsSession &	aWs,
			CWsScreenDevice &	aScreenDevice,
			RWindowBase &	aWindow,
			TRect &	aScreenRect
		)	[pure virtual]

Starts transfer of view finder data to the given portion of the screen using direct screen access.

The aScreenRect parameter is in screen co-ordinates and may be modified if, eg, the camera requires the destination to have a certain byte alignment, etc.

leave

KErrNotReady if PowerOn() has either not been called, or has not yet completed.

Note:

This method is assumed to be meant for default display only. KECamDefaultViewFinderHandle should be used to refer viewfinders started using CCamera methods.

CCamera::CCameraV2DirectViewFinder

Parameters

RWsSession & aWs	Window server session.
CWsScreenDevice & aScreenDevice	Screen device.
RWindowBase & aWindow	Displayable window.
TRect & aScreenRect	Portion of the screen to which view finder data is to be transferred. This is in screen co-ordinates and may be modified if, for example, the camera requires the destination to have a certain byte alignment.

StartViewFinderDirectL(RWsSession &, CWsScreenDevice &, RWindowBase &, TRect &, TRect &)

void	StartViewFinderDirectL	(	RWsSession &	aWs,
			CWsScreenDevice &	aScreenDevice,
			RWindowBase &	aWindow,
			TRect &	aScreenRect,
			TRect &	aClipRect
		)	[pure virtual]

Starts transfer of view finder data to the given portion of the screen using direct screen access and also clips to the specified portion of the screen.

The view finder has the same size and position as aScreenRect but is only visible in the intersection of aScreenRect and aClipRect. May leave with KErrNotSupported or KErrNotReady if Reserve() has not been called, or has not yet completed.

leave

KErrNotReady if PowerOn() hasn't been called successfully.

Note:

This method is assumed to be meant for default display only. KECamDefaultViewFinderHandle should be used to refer viewfinders started using CCamera methods.

CCamera::CCameraClientViewFinder

Parameters

RWsSession & aWs	Window server session.
CWsScreenDevice & aScreenDevice	Screen device.
RWindowBase & aWindow	Displayable window.
TRect & aScreenRect	Portion of the screen to which view finder data is to be transferred. This is in screen co-ordinates and may be modified if, for example, the camera requires the destination to have a certain byte alignment.
TRect & aClipRect	The rectangle to which the screen will be clipped.

StartViewFinderL(TFormat, TSize &)

void	StartViewFinderL	(	TFormat	aImageFormat,
			TSize &	aSize
		)	[pure virtual]

Starts transfer of view finder data.

Picture data is returned by MCameraObserver2::ViewFinderReady().

leave

KErrNotSupported

leave

KErrNotReady if Reserve() has not been called, or has not yet completed.

Note:

This method is assumed to be meant for default display only. KECamDefaultViewFinderHandle should be used to refer viewfinders started using CCamera methods.

CCamera::CCameraClientViewFinder

Parameters

TFormat aImageFormat	The image format requested by the client.
TSize & aSize	On return, the size used.

StartViewFinderL(TFormat, TSize &, TRect &)

void	StartViewFinderL	(	TFormat	aImageFormat,
			TSize &	aSize,
			TRect &	aClipRect
		)	[pure virtual]

Starts transfer of view finder data and clips the picture to the specified clip rectangle. Picture data is returned by MCameraObserver2::ViewFinderReady().

The picture is the size of the intersection of aSize and aClipRect, not simply aSize padded with white space.

leave

KErrInUse if Reserve() hasn't been called successfully,

leave

KErrNotReady if PowerOn() hasn't been called successfully.

Note:

This method is assumed to be meant for default display only. KECamDefaultViewFinderHandle should be used to refer viewfinders started using CCamera methods.

CCamera::CCameraClientViewFinder

Parameters

TFormat aImageFormat	The image format.
TSize & aSize	On return, the size used.
TRect & aClipRect	Required clip rectangle. May be modified if, for example, the camera only supports certain byte alignments.

StopVideoCapture()

void

StopVideoCapture

(

)

[pure virtual]

Stops video capture.

StopViewFinder()

void

StopViewFinder

(

)

[pure virtual]

Stops transfer of view finder data to the screen.

Note:

This method is assumed to be meant for default display only. KECamDefaultViewFinderHandle should be used to refer viewfinders started using CCamera methods.

CCamera::CCameraV2DirectViewFinder

CCamera::CCameraClientViewFinder

VideoCaptureActive()

TBool

VideoCaptureActive

(

)

const [pure virtual]

Tests whether video capture is active.

ETrue if video capture is active. EFalse if video capture is not active

ViewFinderActive()

TBool

ViewFinderActive

(

)

const [pure virtual]

Queries whether the view finder is active.

ETrue if the view finder is active. EFalse if the view finder is not active.

Note:

This method is assumed to be meant for default display only. KECamDefaultViewFinderHandle should be used to refer viewfinders started using CCamera methods.

CCamera::CCameraV2DirectViewFinder

CCamera::CCameraClientViewFinder

ViewFinderMirror()

TBool

ViewFinderMirror

(

)

const [pure virtual]

Gets whether view finder mirroring is active.

ETrue if mirroring is set, EFalse if mirroring is not set.

Note:

This method is assumed to be meant for default display only. KECamDefaultViewFinderHandle should be used to refer viewfinders started using CCamera methods.

CCamera::CCameraV2DirectViewFinder

CCamera::CCameraClientViewFinder

WhiteBalance()

TWhiteBalance

WhiteBalance

(

)

const [pure virtual]

Gets the currently set white balance adjustment value.

The currently set white balance adjustment value.

Note:

CCamera::CCameraAdvancedSettings::WhiteBalanceMode()

ZoomFactor()

TInt

ZoomFactor

(

)

const [pure virtual]

Gets the currently set zoom factor.

The currently set zoom factor.

Member Enumerations Documentation

Enum TBrightness

Specifies whether brightness is set automatically.

Enumerators

EBrightnessAuto = KMinTInt

Sets the brightness automatically.

Enum TContrast

Specifies whether contrast is set automatically.

Enumerators

EContrastAuto = KMinTInt

Sets the contrast automatically.

Enum TExposure

Specifies the type of exposure. - EExposureAuto is the default value.

Enumerators

EExposureAuto = 0x0000	Set exposure automatically. Default, always supported. This may imply auto aperture so clients may receive a KUidEcamEvent2CameraSettingAutoAperture event notification some time later.
EExposureNight = 0x0001	Night-time setting for long exposures.
EExposureBacklight = 0x0002	Backlight setting for bright backgrounds.
EExposureCenter = 0x0004	Centered mode for ignoring surroundings.
EExposureSport = 0x0008	Sport setting for very short exposures.
EExposureVeryLong = 0x0010	Generalised setting for very long exposures.
EExposureSnow = 0x0020	Snow setting for daylight exposure.
EExposureBeach = 0x0040	Beach setting for daylight exposure with reflective glare.
EExposureProgram = 0x0080	Programmed exposure setting.
EExposureAperturePriority = 0x0100	Aperture setting is given priority.
EExposureShutterPriority = 0x0200	Shutter speed setting is given priority. This may imply auto aperture so clients may receive a KUidEcamEvent2CameraSettingAutoAperture event notification some time later.
EExposureManual = 0x0400	User selectable exposure value setting.
EExposureSuperNight = 0x0800	Exposure night setting with colour removed to get rid of colour noise.
EExposureInfra = 0x1000	Exposure for infra-red sensor on the camera

Enum TFlash

Specifies the type of flash.

Enumerators

EFlashNone = 0x0000	No flash, always supported.
EFlashAuto = 0x0001	Flash will automatically fire when required.
EFlashForced = 0x0002	Flash will always fire.
EFlashFillIn = 0x0004	Reduced flash for general lighting
EFlashRedEyeReduce = 0x0008	Red-eye reduction mode.
EFlashSlowFrontSync = 0x0010	Flash at the moment when shutter opens.
EFlashSlowRearSync = 0x0020	Flash at the moment when shutter closes.
EFlashManual = 0x0040	User configurable setting
EFlashVideoLight = 0x0080	Constant emission of light during video mode Note: This value is available only to the API clients using CCamera::New2L() or CCamera::NewDuplicate2L()

Enum TFormat

Possible still image and video frame formats

Formats are read from left to right, starting at the top of the image. YUV format is as defined by ITU-R BT.601-4.

Enumerators

EFormatMonochrome = 0x0001	8 bit greyscale values, 0=black, 255=white.
EFormat16bitRGB444 = 0x0002	Packed RGB triplets, 4 bits per pixel with red in the least significant bits and the 4 most significant bits unused.
EFormat16BitRGB565 = 0x0004	Packed RGB triplets, 5 bits per pixel for red and blue and 6 bits for green, with red in the least significant bits.
EFormat32BitRGB888 = 0x0008	Packed RGB triplets, 8 bits per pixel with red in the least significant bits and the 8 most significant bits unused.
EFormatJpeg = 0x0010	JFIF JPEG.
EFormatExif = 0x0020	EXIF JPEG
EFormatFbsBitmapColor4K = 0x0040	CFbsBitmap object with display mode EColor4K.
EFormatFbsBitmapColor64K = 0x0080	CFbsBitmap object with display mode EColor64K.
EFormatFbsBitmapColor16M = 0x0100	CFbsBitmap object with display mode EColor16M.
EFormatUserDefined = 0x0200	Implementation dependent.
EFormatYUV420Interleaved = 0x0400	4:2:0 format, 8 bits per sample, Y00Y01Y10Y11UV.
EFormatYUV420Planar = 0x0800	4:2:0 format, 8 bits per sample, Y00Y01Y02Y03...U0...V0...
EFormatYUV422 = 0x1000	4:2:2 format, 8 bits per sample, UY0VY1. Maps to Graphics' EUidPixelFormatYUV_422Interleaved in pixelformats.h.
EFormatYUV422Reversed = 0x2000	4:2:2 format, 8 bits per sample, Y1VY0U. Maps to Graphics' EUidPixelFormatYUV_422InterleavedReversed in pixelformats.h.
EFormatYUV444 = 0x4000	4:4:4 format, 8 bits per sample, Y00U00V00 Y01U01V01...
EFormatYUV420SemiPlanar = 0x8000	4:2:0 format, 8 bits per sample, Y00Y01Y02Y03...U0V0...
EFormatFbsBitmapColor16MU = 0x00010000	CFbsBitmap object with display mode EColor16MU.
EFormatMJPEG = 0x00020000	Motion JPEG for video Note: This value is available only to the API clients using CCamera::New2L() or CCamera::NewDuplicate2L().
EFormatEncodedH264 = 0x00040000	Compressed H264 video format. Note: This value is available only to the API clients using CCamera::New2L() or CCamera::NewDuplicate2L().
EFormatYUV222ReversedV2 = 0x00080000	4:2:2 format, 8 bits per sample, Y0UY1V. Maps to Graphics' EUidPixelFormatYUV_422Reversed in pixelformats.h. Note: This value is available only to the API clients using CCamera::New2L() or CCamera::NewDuplicate2L().

Enum TWhiteBalance

Specifies how the white balance is set.

Enumerators

EWBAuto = 0x0000	Set white balance automatically. Default, always supported.
EWBDaylight = 0x0001	Normal daylight.
EWBCloudy = 0x0002	Overcast daylight.
EWBTungsten = 0x0004	Tungsten filament lighting.
EWBFluorescent = 0x0008	Fluorescent tube lighting
EWBFlash = 0x0010	Flash lighting.
EWBSnow = 0x0020	High contrast daylight primarily snowy
EWBBeach = 0x0040	High contrast daylight primarily near the sea
EWBManual = 0x0080	User configurable mode
EWBShade = 0x0100	Shade
EWBAutoSkin = 0x0200	auto skin If New2L()/NewDuplicate2L() are not used to create camera object, this enum value would be considered as unrecognized and filtered out in 'supported' or 'getter' methods.
EWBHorizon = 0x0400	horizon If New2L()/NewDuplicate2L() are not used to create camera object, this enum value would be considered as unrecognized and filtered out in 'supported' or 'getter' methods.
EWBDaylightUnderWater = 0x0800	Daylight Under Water If New2L()/NewDuplicate2L() are not used to create camera object, this enum value would be considered as unrecognized and filtered out in 'supported' or 'getter' methods.