/*

* Copyright (c) 2004 - 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:  Call control interface

*

*/

#ifndef MVTCTLCALLCONTROL_H

#define MVTCTLCALLCONTROL_H

//  INCLUDES

#include "VtCtlDefs.h"

#include "TVtCtlType.h"

// CLASS DECLARATION

/**

*  Call control class

*  

*  @lib CSCallCtrl

*  @since 2.6

*/

class MVtCtlCallControl

    {

    public:  // new functions

        /**

        * Session state

        * EIdle          idle, no connection

        * EInitializing  initializing MO session

        * EAlerting      alerting at remote end 

        * ERinging       incoming session ringing

        * EConnected     session is established

        * EDisconnecting disconnecting session

        */

        enum TVtCtlState {

            EUnknown,       // 0

            EIdle,          // 1

            EInitializing,  // 2

            EAlerting,      // 3

            ERinging,       // 4

            EConnected,     // 5

            EDisconnecting  // 6

            };        

        /**

        * Session direction

        * EDirectionUnknown          unknown direction

        * EDirectionMobileOriginated MO session

        * DirectionMobileTerminated  MT session

        */

        enum TVtCtlDirection

            {

            EDirectionUnknown,

            EDirectionMobileOriginated,

            DirectionMobileTerminated

            };

        /**

        * Gets session duration

        * @param aId session id

        * @param aDuration session duration

        * @return Symbian OS error code

        */

        virtual TInt GetDuration( 

            TVtCtlSessionId aId,

            TVtCtlDuration& aDuration ) = 0;

        /**

        * Gets information on a session. 

        * @param aId session id

        * @param aInfo packetized object derived from TVtCtlType

        */

        virtual void GetSessionInfoL( 

            TVtCtlSessionId aId,

            TDes8& aInfo ) = 0;

        /**

        * Returns session state

        * @param aId session id

        * @return session state

        */

        virtual TVtCtlState GetSessionState( 

            TVtCtlSessionId aId ) const = 0;

        /**

        * Returns previous session state

        * @param aId session id

        * @return session state

        */

        virtual TVtCtlState GetPreviousPreviousState( 

            TVtCtlSessionId aId ) const = 0;

    };

#endif      // MVTCTLCALLCONTROL_H

// End of File