/*
* Copyright (c) 2010 ISB.
* All rights reserved.
* This component and the accompanying materials are made available
* under the terms of the "Symbian Foundation License v1.0"
* which accompanies this distribution, and is available
* at the URL "http://www.symbianfoundation.org/legal/sfl-v10.html".
*
* Initial Contributors:
* ISB - Initial contribution
*
* Contributors:
*
* Description:
*
*/

#ifndef WEBCAMERACONVERT_H__
#define WEBCAMERACONVERT_H__

#include <e32def.h> 
#include <comm.h>
#ifndef WEBCAMERA_UVC_H_
#include "webcamera_uvc.h"
#endif

const TUint KWebcameraNeutralGrayValue	= 220;
const TUint KWebcameraColorGradation	= 256;		// true color.
const TUint KWebcameraBitMask			= 0x000000ff;
const TUint KWebcameraBitMask8			= 0x0000ff00;
const TUint KWebcameraBitMask16			= 0x00ff0000;

/**
Perform a Convert function Base.
*/
class DWebCameraConvertBase : public DBase
	{
public:
	/**
	Constructor.
	*/
	DWebCameraConvertBase(TWebcameraUVC* aUvcFormat);

	/** 
	Destructor.
	*/
	~DWebCameraConvertBase();
public: //virtual function.
	/**
	Convert FrameData to Bitmap.

	@param	aInBuf	[in]			FrameData before conversion.
			aOutBuf	[out]			BimapData after conversion.
	@return	KErrNotSupported.		Implement in sub-class, return unsupport in base-class.
	*/
	virtual TInt ConvertData(TUint8* aInBuf, TUint8* aOutBuf);

protected:
	TWebcameraUVC* iUvcFormat;
	};

/**
Perform a Convert function (Yuv -> Bitmap).
*/
class DWebCameraConvertYuv : public DWebCameraConvertBase
	{
public:
	/**
	Create object.
	@return Pointer of object.
	*/
	static DWebCameraConvertYuv* NewL();

	/**
	Constructor.
	*/
	DWebCameraConvertYuv(TWebcameraUVC* aUvcFormat);

	/**
	Destructor.
	*/
	~DWebCameraConvertYuv();

public: //from DWebCameraConvertBase
	/**
	Convert FrameData to Bitmap(YUV->Bitmap).

	@param	aInBuf	[in]			FrameData before conversion.
			aOutBuf	[out			BitmapData after conversion.
	@return	KErrNone.
	*/
	TInt ConvertData(TUint8* aInBuf, TUint8* aOutBuf);
private:
	/**
	Secondary constructor.
	*/
	void ConstructL();

	/**
	Convert YUV to RGB.

	@param	aY	[in]				Signal of brightness.
			aU	[in]				Signal of colour difference(Cb).
			aV	[in]				Signal of colour difference(cr).
	@return	Pixel.
	*/
	TInt ConvertYuvToBitmap(TInt aY, TInt aU, TInt aV);
	};

/**
Convert function
*/
class DWebCameraConvert : public DBase
	{
public:
	/**
	Constructor.
	*/
	DWebCameraConvert(TWebcameraUVC* aUvcFormat);

	/**
	Destructor.
	*/
	~DWebCameraConvert();

	/**
	Decide video format, by video format from UVC class. 

	@param	aInBuf		[in]		Data to convert.
			aOutBuf		[out]		BitmapData after conversion.
			aVideoData	[in]		Format data of Video.
	@return	KErrNone
	*/
	TInt ConvertData(TUint8* aInBuf, TUint8* aOutBuf);

private:
	/**
	Store the instance.
	*/
	DWebCameraConvertBase* iConvertObject;
	};

#endif // ECAMWEBCAMERACONVERT_H