/*

* Copyright (c) 2008 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:  Video Source subsystem.

*

*/

#ifndef C_MULTIFRAMEDATAAO_H

#define C_MULTIFRAMEDATAAO_H

// INCLUDE FILES

#include <e32base.h>

#include "mmultiframeprovider.h"

// FORWARD DECLARATIONS

class CMultiframeProvider;

// MACROS

/**

*  @lib videosource.lib

*/

// ============================ CMultiframeDataAO ===============================

NONSHARABLE_CLASS( CMultiframeDataAO ) : public CTimer

    {

    public: // Constructors and destructor

        /**

        * Constructor.

        * @param "aRequester" instance to requester

        */

        CMultiframeDataAO( CMultiframeProvider* aRequester );

        /**

        * Destructor.

        */

        ~CMultiframeDataAO();

    public: // New functions

				/**

        * Sets observer.

        * @param "aObserever" instance to observer

        */

				void SetObserver( MMultiframeprovider* aObserver );

        /**

        * Activates CTimer

        * @param "aUpdateTime" expiration time

        */

        void Activate( TTimeIntervalMicroSeconds aUpdateTime, TBool aInit, TBool aVFUpdate );

       	/**

        * Updates local buffer.

        * @param "aLocalBuffer" local buffer

        */

        void LocalBuffer( CVtImageBitmap* aLocalBuffer );

        /**

        * Updates remote buffer.

        * @param "aRemoteBuffer" remote buffer

        */

        void RemoteBuffer ( CVtImageBitmap* aRemoteBuffer );

        /**

        * Cancels looping and completes request in correct thread.

        */        

        void CancelTimeLoop();

    private:    // Functions from base classes

        /**

        * From CActive. See CActive for description.

        */

        void RunL();

    private:    // Data

        // Pointer to observer.

        MMultiframeprovider* iObserver; // not owned

        // Pointer to requester

        CMultiframeProvider* iRequester;

        // For updating ViewFinder buffer

        TImageShareDataBuffer iLocalBuffer;

        // For updating remote buffer

        TImageShareDataBuffer iRemoteBuffer;

        // For updating remote buffer if activated when active

        TImageShareDataBuffer iRemoteSecondBuffer;

        // For updating ViewFinder buffer if activated when active

        TImageShareDataBuffer iLocalSecondBuffer;

        // Initialization flag

        TBool iInit;

        // Delta calc ref point

       	TTimeIntervalMicroSeconds iTime;

        // VF update flag

        TBool iVFUpdate;

        // Id of thread whose active scheduler this instance is added into.

        TThreadId iThreadId;

        // A flag to indecate loop ao must be stopped

        TBool iRequireStopping;

    };

#endif //C_MULTIFRAMEDATAAO_H

//  End of File