// Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// under the terms of "Eclipse Public License v1.0"

// which accompanies this distribution, and is available

// at the URL "http://www.eclipse.org/legal/epl-v10.html".

//

// Initial Contributors:

// Nokia Corporation - initial contribution.

//

// Contributors:

//

// Description:

//

#ifndef EXIFTHUMBNAILGENERATOR_H

#define EXIFTHUMBNAILGENERATOR_H

#include <e32base.h>

#include <f32file.h>

#include <icl/imagecodec.h>

#include <imageconversion.h>

#include "JpegTypes.h"

class CFbsBitmap;

class CBitmapScaler;

class CImageWriteCodec;

class MExifSource;

//class CFrameImageData;

class CScaledJpegGenerator : public CActive

	{

public:

	enum TImageToGenerate

		{

		EMainImage,

		EThumbnail

		};

public:

	static CScaledJpegGenerator* NewL(TRequestStatus* aNotifier, const MExifSource* aSource, 

		TBool aMaintainAspectRatio = ETrue, CImageDecoder::TOptions aDecoderOptions = CImageDecoder::EOptionNone);

	~CScaledJpegGenerator();

	void StartL(TSize aSize, TImageToGenerate aImageType);

	HBufC8* GetJpegDataL();

	HBufC8* JpegDataBufferL(const TUint aIndex);

	void GetScaledImageSize(TSize &aSize);

private:

	CScaledJpegGenerator(TRequestStatus* aNotifier, TBool aMaintainAspectRatio, 

		CImageDecoder::TOptions aDecoderOptions);

	void ConstructL(const MExifSource* aSource);

	void RunL();

	void DoCancel();

	void GenerationCompleteL();	

	TInt RunError(TInt aError);

	void DoScaleBitmapL();

	void DoConvertL();

	void CreateJpegCodecL();

	void CleanTempData();

	void CleanResultData();

	void CleanData();

private:

	const MExifSource* iSource;

	TRequestStatus* iNotifier;

	TSize iSize;

	TImageToGenerate iImageType;

	CFbsBitmap* iBitmap;

	CImageDecoder* iImageDecoder;

	CBitmapScaler* iBitmapScaler;

	CImageWriteCodec* iJpegCodec;

	TFrameState iFrameState;

	RPointerArray<HBufC8> iJPegImage;

	HBufC8* iJpegChunck;

	TBufPtr8 iJpegChunckPtr;

	CImageDecoder::TOptions iDecoderOptions;

	enum TThumbnailGeneratorState

		{

		EEmpty,

		EDecode,

		EScale,

		EConvert,

		EFinished

		};

	TThumbnailGeneratorState iState;

	RPointerArray<HBufC8> iComment;

	TQTable* iLumaTable;

	TQTable* iChromaTable;

	TBool iMaintainAspectRatio;

	};

#endif 	// EXIFTHUMBNAILGENERATOR_H