/*

* Copyright (c) 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: Juha Kauppinen, Mika Hokkanen

* 

* Description: Photo Browser

*

*/

#ifndef __IETNGENERATORAO_H__

#define __IETNGENERATORAO_H__

#include <e32base.h>

#include <f32file.h>

#include <BitmapTransforms.h>

#include <ImageConversion.h>

#include "IEBgpServerSession.h"

#include <IEBgpsInfo.h>

#include <ICLExif.h> 

#include <exifmodify.h>

#include <exifread.h>

#include "debug.h"

class CImageDecoder;

class CFbsBitmap;

//#define USE_EXT_JPEG_DEC

#ifdef USE_EXT_JPEG_DEC

class CExtJpegDecoder;

#endif

#define DECODE_FROM_BUFFER

// CONSTANTS

const TInt KMimeStringLength = 256;

class  CIETNGeneratorAO : public CActive

{

public:

	static CIETNGeneratorAO* NewL(RFs& aFileServer, MIEThumbNailObserver &aObserver);

	virtual ~CIETNGeneratorAO();

private:

	void ConstructL();

	CIETNGeneratorAO(RFs& aFileServer, MIEThumbNailObserver &aObserver);

protected:  // Type declarations

    enum TIETNConvertStatus

    {

    	ENone = 0,

        EDecoding,

        EScaling,

        EEncoding,

        EReady

    };

public:

	void SetImageArray(	RArray<CImageData*> aImageArray);

	void CancelOutStaningRequests();

	void DeleteObjects();

	void CancelRequestsAndDeleteObjects();

public: // From CActive

	void RunL();

	void DoCancel();

	TInt RunError(TInt aError);

public: // Other public functions

	RArray<CImageData*> iImageArray;

	void CreateThumbnailL(const TDes& aSourceFile, const TDes& aThumbnailFile, const TSize &aSize);

	void CreateThumbnailL(const TDes& aSourceFile, const TDes& aThumbnailFile, const TSize &aSize, CFbsBitmap* a512x512TnBitmap);

private:

	void SetJpegImageDataL();

	void WriteExifDataL(const TDes &aFilename, TSize aSize);

	void DecodeL();

	void EncodeL();

	void ScaleL();

	void TargetDecodingSize(const TSize aTgtSize, TSize& aSrcSize);

	TBool IsLargeThumbnail(const TSize& aResolution) const;

	TBool IsJPEG(const TSize& aResolution) const;

private:

    RFs&                  iFileServer;

#ifdef USE_EXT_JPEG_DEC

    CExtJpegDecoder*      iImageDecoder;

#else

    CImageDecoder*        iImageDecoder;

#endif

    CImageEncoder*        iImageEncoder;

    CFbsBitmap*           iBitmap;

    CBitmapScaler*        iBitmapScaler;

    TIETNConvertStatus    iConvertStatus;   /** Convert status */

    MIEThumbNailObserver& iThumbnailObserver;

    TFileName             iSourceFileName;

    TFileName             iThumbnailFileName;

    TBuf8<KMimeStringLength> iMimeString;   /** The source file Mime-string */

    TSize                 iSourceSize;

    CFrameImageData*      iFrameImageData;

    TSize                 iThumbnailSize;

    TTime                 iSourceTime;      /** Source file time */

    TInt                  iError;  

    CFbsBitmap*           i512x512TnBitmap;

    TUid                  decoderUid;

#ifdef DECODE_FROM_BUFFER

    HBufC8*               iSourceData;

#endif

};

#endif