/*

* Copyright (c) 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:  Base class for media readers.

*

*/

#ifndef BMMEDIAREADER_H

#define BMMEDIAREADER_H

#include <e32base.h>

#include "BMMediaReaderInterface.h"

class MBubbleMediaReaderObserver;

/**

 *  Base class for media readers.

 *

 *  @lib BubbleManager

 *  @since S60 v3.2

 */

class CBubbleMediaReader : public CBase,

                           public MBubbleMediaReader

    {

public:    

    virtual ~CBubbleMediaReader();

    /**

     * Derived class should call this when image or new 

     * animation frame has been read to frame buffer.

     *

     * @since S60 v3.2

     */

    void HandleReadingComplete();

    /**

     * Derived class should call this in error situation.

     *

     * @since S60 v3.2

     * @param aError System wide error code.

     */

    void HandleReadingError( TInt aError );

protected: // from MBubbleMediaReader

    virtual void StartReadingL( 

        const TSize& aTargetSize, 

        const TReal& aScaleFactor,

        const TRect& aClipRect, 

        MBubbleMediaReaderObserver* aObserver ) = 0;

    virtual TInt SetScaleAndClip(

        const TSize& aTargetSize,

        const TReal& aScaleFactor,

        const TRect& aClipRect ) = 0;        

    virtual void CancelReading() = 0;

    virtual const TSize SourceSize() const = 0;

    virtual TBool IsAnimation() const = 0;

    virtual const CFbsBitmap* FrameBuffer() const;

    virtual const CFbsBitmap* Mask() const;

    virtual void Play() = 0;

    virtual void Stop() = 0;

public:

    CBubbleMediaReader();

protected: // data

    // Not owned

    const CFbsBitmap* iFrameBuffer;

    // Not owned

    const CFbsBitmap* iMask;

    // Not owned

    MBubbleMediaReaderObserver* iObserver;

    };

#endif // BMMEDIAREADER_H