/** @file

* Copyright (c) 2005-2006 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:  Declares ThumbnailCreator class.

*

*/

#ifndef C_CUPNPTHUMBNAILCREATOR_H

#define C_CUPNPTHUMBNAILCREATOR_H

//INCLUDE

#include <e32base.h>

#include <f32file.h>

#include <gulicon.h>

#include <mdaimageconverter.h>

#include "upnpcontentdirectoryglobals.h"

//FORWARD DECLARATIONS

class CImageEncoder;

class CImageDecoder;

class CBitmapScaler;

class CFbsBitmap;

class CUpnpThumbnailCreator;

class MUpnpThumbnailCreatorObserver;

/**

*  @brief Thumbnail Creator Observer

*

*  @lib AVContentDirectory.lib

*  @since Series60 3.1

*/

class MUpnpThumbnailCreatorObserver

{ 

public:

    /*

    *

    * @since Series S60 3.1

    * @param aThCreator

    * @param Result

    */

    virtual void NotifyThumbnailResultL(CUpnpThumbnailCreator* aThCreator, TInt aResult ) = 0;

};

/**

*  @brief Thumbnail Creator

*

*  @lib AVContentDirectory.lib

*  @since Series60 3.1

*/

NONSHARABLE_CLASS( CUpnpThumbnailCreator ): public CActive

    {

public:

    enum TPhase

    {

        EDecode,

        EEncode,

        EScaling,

        ESleep,

        EDecodeObject

    };

    /**

    * Two-phased constructor for building CUpnpThumbnailCreator.

    * @since Series60 3.1

    * @param aObserver

    */

    static CUpnpThumbnailCreator* NewLC( MUpnpThumbnailCreatorObserver* aObserver );

    /**

    * Destructor function; called automatically from the destructor of a 

    * derived class

    **/

    ~CUpnpThumbnailCreator();

    /**

    * Function creates thumbnail for given image file

    * @since Series60 3.1

    * @param aSourceFile full file name

    **/

    void CreateL( const TDesC& aSourceFile, const TDesC& aThumbName );

    /**

    *

    * @since Sereries S60 3.1

    */

    TFileName GetFileName();

    /**

    *

    * @since Sereries S60 3.1

    */

    TPtrC GetFileExt();

    /**

    * Getter for file size 

    */

    TFileName GetPath();

    /**

    * Getter for file size 

    **/

    TSize GetSize(const TDesC& aSourceFile);

private:

    /**

    * By default Symbian 2nd phase constructor is private

    * @since Series60 3.1

    */     

    void ConstructL();

    /**

    * First phase constructor.

    * @param aObserver - pointer to observer

    * @since Series60 3.1

    **/

    CUpnpThumbnailCreator( MUpnpThumbnailCreatorObserver* aObserver );

    /**

    * Encode bitmap to jpeg and writes it to file.

    * @since Series60 3.1

    **/

    void EncodeAndConvertL();

    /**

    * Implementation of pure virtual from CActive

    * serves decoding phases completion

    * @since Series60 3.1

    */

    void RunL();

    /**

    * Implementation of virtual from CActive

    * serves decoding phases completion

    * @since Series60 3.1

    */

    TInt RunError(TInt aErr);

    /**

    * Implementation of pure virtual from CActive

    * @since Series60 3.1

    */

    void DoCancel();

    /**

    * Calculate resizing ratio (2,4 and 8) for decoder

    * in order not to create big bitmaps into memory 

    * @param aLoadSize - function stores computed size in it

    * @since Series60 3.1

    */

    void CalculateSize( TSize& aLoadSize );

    /**

    * Used internally by CalculateSize

    * @since Series60 3.1

    */

    TInt DivisionCeil( const TInt aVal, const TInt aDiv );

private:

    //Observer

    MUpnpThumbnailCreatorObserver* iObserver;

    //File server

    RFs                     iFs;

    //Image decoder

    CImageDecoder*          iDecoder;

    //Image encoder

    CImageEncoder*          iEncoder;

    //Scaler

    CBitmapScaler*          iScaler;

    //Bitmap

    CFbsBitmap*             iBitmap;

    //Bitmap default size

    TSize                   iSize;

    // Parser

    TParse                  iParse;

    // Extension

    TBuf<KExtensionLength>  iExtension;

    //State enum

    TPhase                  iPhase;

    //File name e.g. pic.jpg

    TFileName               iFileName;

    //Path

    TPath                   iPath;

    //Image type uid

    TUid                    iImageType;

    //Old image size 

    TSize                   iOldSize; 

    //frame info

    TFrameInfo              iInfo;

    };

#endif  // C_CUPNPTHUMBNAILCREATOR_H