/*

* Copyright (c) 2005-2009 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:

*

* Description:   This class implements legacy volume control of AVRCP Controller.	

*

*

*/

#ifndef BTRCCLEGACYVOLUMELEVELCONTROLLER_H

#define BTRCCLEGACYVOLUMELEVELCONTROLLER_H

//  INCLUDES

#include <e32base.h>

#include <remconcoreapicontrollerobserver.h> 

#include <bttypes.h> // BT protocol wide types 

#include "btrccVolumeLevelControllerBase.h"

// FORWARD DECLARATIONS

class CRemConInterfaceSelector; 

class CRemConCoreApiController; 

class CBTRCCActive;

// CLASS DECLARATION

NONSHARABLE_CLASS(CBTRCCLegacyVolumeLevelController) :  

    public CBTRCCVolumeLevelControllerBase, 

    public MRemConCoreApiControllerObserver 

	{

	public:  // Constructors and destructor

		/**

		* Two-phased constructor.

		*      

		*/

		static CBTRCCLegacyVolumeLevelController* NewL(CRemConInterfaceSelector& aInterfaceSelector, MBTRCCVolumeControllerObserver& aObserver);

		/**

		* Destructor.

		*/

		virtual ~CBTRCCLegacyVolumeLevelController();

	private:

		enum TState

			{

			EStateWaitingForVolumeLevelChanges,

			EStateDelay,

			EStateVolumeUpTiming,

			EStateVolumeUp,	

			EStateVolumeDownTiming,

			EStateVolumeDown,	

			}; 

        /**

        * C++ default constructor.

        */

        CBTRCCLegacyVolumeLevelController(MBTRCCVolumeControllerObserver& aObserver);

        /**

        * Symbian 2nd phase constructor.

        */

        void ConstructL(CRemConInterfaceSelector& aInterfaceSelector);

        /**

         * Decides the next operation for volume controlling

         */

        void DoRemoteControl();

        /**

         * Starts a timer. The timeout value is specified by aInterval

         */

        void StartTimer(TInt aInterval);

        /**

         * Send a volume up or down command decided by aDirection.

         */

        void SendVolumeCommand(TInt aDirection);

	public: // From CBTRCCVolumeLevelControllerBase

	    void DoStart(TInt aInitialVolume); // Starts monitoring for volume level changes. 

	    void DoStop(); // Stop monitoring for volume level changes. 

	    void DoReset(); // Reset the volume level.  

	public: // From MBTRCCActiveObserver

        void RequestCompletedL(CBTRCCActive& aActive, TInt aErr);            

        void CancelRequest(TInt aServiceId);

	private: // From CBTRCCVolumeLevelControllerBase

        void AdjustRemoteVolume(TInt aVolume); 

        TInt GetPhoneVolume(TInt &aVol);

    private:  // From MRemConCoreApiControllerObserver

		TInt MrccacoResponse(); 

	private: // Data

		CRemConCoreApiController* iRemConVolController; // changes the accessory's volume level. 

        TUint iNumRemotes; 

        TState iState;

        TInt iPhoneVolume; // target volume level

        TInt iCurrentPhoneVolume; // current volume level of phone

		TInt iCurrentRemoteVolume;  // current volume level of remote

	    TInt iLocalMaxVolume; // maximum volume level of phone

		// Active object for various timers and volume control operation.

		CBTRCCActive *iBtrccLegacyVolumeActive;

		// Not owned

		CRemConInterfaceSelector *iInterfaceSelector;

		RTimer iCtrlRTimer;

    };

#endif      // BTRCCLEGACYVOLUMELEVELCONTROLLER_H

// End of File