/*

* 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:   Class used to start and stop the TFX Server

*

*/

#ifndef C_TRANSITIONSERVERCONTROLLER_H

#define C_TRANSITIONSERVERCONTROLLER_H

#include <e32base.h>

#include <w32std.h>

#include <mtransitionserver.h>

#include <alfdecoderserverclient.h>

#include "alfpsobserver.h"

class RTfxServerInjector;

class CWsEventEater;

class CAlfPsObserver;

class CRepository;

/**

 * transition effect server controller

 * 

 * this class is used to load and start the TfxServer into the wserv process.

 * The code is loaded into the wserv through a CAnimDll wserv plugin.

 * because of this, when this class is destroyed, the TfxServer thread will be killed.

 */

// MPsObserver will probably not bee needed - to be removed later

NONSHARABLE_CLASS(CAlfTransitionServerController) : public CBase,

								   		 public MPsObserver

    {

public:

	friend class CAlfTransitionServerClient;

	/**

     * Public part of two phase construction.

     * @since S60 3.2

     *

     * @param Reference to a Window server session.

     * @return Pointer to the newly created CAlfTransitionServerController object.

    */  

    static CAlfTransitionServerController* NewL(RWsSession& /*aWsSession*/);

	/**

     * Destructor

     * @since S60 3.2

     *

    */  

    virtual ~CAlfTransitionServerController();

	/**

     * Start the transition server

     * @since S60 3.2

     *

     * @return KErrNone or any of the system error codes.

    */  

    TInt StartTransitionServer();

	/**

     * Gracefully shut down the transition server.

     * @since S60 3.2

     *

     * @return KErrNone or any of the system error codes.

    */  

    TInt StopTransitionServer();

	/**

     * Checks to see if server is running.

     * @since S60 3.2

     *

     * @return ETrue if server is running, otherwise EFalse.

    */  

    TBool ServerRunning();

   	/**

     * Start the transition server

     * @since S60 3.2

     * 

     * Starts the server with different values for MaxBytesOngoing and 

     * MaxBytesBetween than the default ones. 

     * MaxBytesOngoing is the maximum amount of bytes that may be cached while a transition

     * is ongoing. If this value is less than the total size of the 

	 * decoded images in the effect the images has to be decoded every 

	 * frame which will have a huge impact on performance. 

     *

     * MaxBytesBetween is the maximum amount of bytes that may be cached when a transition

	 * is not ongoing.

	 *

     * @param aMaxBytesOngoing maximum bytes in cache during a transition  	   

     * @param aMaxBytesBetween maximum bytes in cache between transitions

     * @return KErrNone or any of the system error codes.

    */  

    TInt StartTransitionServer(TInt32 aMaxBytesOngoing, TInt32 aMaxBytesBetween);

    static TInt ConnectionCallback( TAny* aParameter );

    TInt ConnectionAttempt();

  	void PsValueUpdated( const TUid aCategory, const TUint aKey, const TInt aVal );

private:

	/**

     * Private part of two phase construction.

     *

    */  

    void ConstructL();

	/**

     * Private constructor.

    */  

    CAlfTransitionServerController();

private: // data

    CAlfPsObserver* iPsObserver;

    // The public and subscribe value keeping track if server is running

    TInt iTransitionControlValue;

    // The value in central repository to keep track if effects are allowed

    TInt iEffectValue;

    CRepository* iRepository;

   	RAlfTfxClient iTfxServer;

   	TBool iIsConnected;

   	CPeriodic* iTimer;

   	TBool iTimerRunning;

    };

#endif //C_TRANSITIONSERVERCONTROLLER_H