/*

* Copyright (c) 2007 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:  Provides a central repository observer for telephone volume

*

*/

#ifndef CSVPVOLUMEOBSERVER_H

#define CSVPVOLUMEOBSERVER_H

#include <e32base.h>

#include <cenrepnotifyhandler.h>

#include <MTelephonyAudioRoutingObserver.h>

#include "svputdefs.h"

// FORWARD DECLARATIONS

class MSVPVolumeUpdateObserver;

class CTelephonyAudioRouting;

 /**

  *  Provides a telephone volume for SVP session.

  *

  *  @lib svp.dll

  *  @since S60 3.2

  */

class CSVPVolumeObserver : public CBase,

                           public MCenRepNotifyHandlerCallback,

                           public MTelephonyAudioRoutingObserver 

    {

    public: // default constructor and destructor

        /**

         * Two-phased constructor.

         */

        static CSVPVolumeObserver* NewL(

            MSVPVolumeUpdateObserver& aObserver );

        /**

         * Destructor.

         */

        virtual ~CSVPVolumeObserver();

    private:

        // from MTelephonyAudioRoutingObserver

        void AvailableOutputsChanged(

            CTelephonyAudioRouting& aTelephonyAudioRouting );

        void OutputChanged( CTelephonyAudioRouting& aTelephonyAudioRouting );

        void SetOutputComplete(

            CTelephonyAudioRouting& aTelephonyAudioRouting, TInt aError );

        // from MCenRepNotifyHandlerCallback

        /**

          Notifies when a generic value has been changed

          @since S60 3.2

          @param aId Id of the key that has changed

         */

        void HandleNotifyGeneric( TUint32 aId );

    private:

        /**

         * C++ default constructor.

         */

        CSVPVolumeObserver( MSVPVolumeUpdateObserver& aObserver );

        /**

         * By default Symbian 2nd phase constructor is private.

         */

        void ConstructL();

    private:    // Data

        /**

         * Current telephone IHF volume setting

         */

        TInt iCurrentIhfVolume;

        /**

         * Current telephone earpiece volume setting

         */

        TInt iCurrentEarVolume;

        /**

         * Current telephone mode (IHF/EARPIECE)

         */

        TInt iMode;

        /**

         * Central repository instance

         * Own.

         */

        CRepository* iRepository;

        /**

         * Central repository notifier instance

         * Own.

         */

        CCenRepNotifyHandler* iNotifier;

         /**

         * Instance of telephony audio routing

         * used to track mode changes between ear and Ihf

         * Own.

         */

        CTelephonyAudioRouting* iTelephonyAudioRouting;

        /**

         * Reference to volume upadte observer

         * Used to inform session about volume updates

         */

        MSVPVolumeUpdateObserver& iVolumeUpdate;

    private: 

    	// For testing

      	SVP_UT_DEFS

    };

#endif //  C_SVPVOLUMEOBSERVER_H