/*

* Copyright (c) 2002-2007 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:  This file contains the header file of the class CPEGsmAudioDatar, 

*                which is an GSM specific interface class to audio properties of the system

*

*/

#ifndef CPEGSMAUDIODATA_H

#define CPEGSMAUDIODATA_H

//  INCLUDES

#include "cpeaudiodata.h"

#include <pevirtualengine.h>

#include <e32base.h>

#include <mccedtmfobserver.h>

// CONSTANTS

// None.

// MACROS

// None.

// DATA TYPES

// None.

// FUNCTION PROTOTYPES

// None.

// FORWARD DECLARATIONS

class CPEAudioInbandTonePlayer;

class CPEAudioFactory;

class MPEClientInformation;

// CLASS DECLARATION

/**

*  This file contains the header file of the class CPEGsmAudioData, 

*

*  @lib Audiohandling.lib

*  @since Series60_2.7

*/

class CPEGsmAudioData : public CPEAudioData,

                        public MCCEDtmfObserver

    {

    public:  // Constructors and destructor

        /**

        * Two-phased constructor.

        */

        IMPORT_C static CPEGsmAudioData* NewL( MPEPhoneModelInternal& aPhoneModel,

                                               RFs& aFsSession );                                  

        /**

        * Two-phased constructor for testing purposes

        */        

        IMPORT_C static CPEGsmAudioData* NewL( MPEPhoneModelInternal& aPhoneModel,

                                               RFs& aFsSession,

                                               CPEAudioFactory& aAudioFactory );                          

        /**

        * Destructor.

        */

        IMPORT_C virtual ~CPEGsmAudioData();

    public: // From MCCEDtmfObserver

        /**

        * All the occurred DTMF events are notified through this interface

        *

        * @since S60 3.2

        * @param aEvent Event code

        * @param aError Error code

        * @param aTone tone 

        * @return none

        */

        IMPORT_C void HandleDTMFEvent( const MCCEDtmfObserver::TCCEDtmfEvent aEvent, 

                                       const TInt aError, 

                                       const TChar aTone );

    public: // New functions

        /**

        * Plays the given dtmf tone

        * @since Series60_2.7

        * @param  aTone, dtmf tone to be played

        * @return None.  

        */

        IMPORT_C void PlayDtmfTone( const TChar& aTone ) const; 

        /**

        * Stops the playing of dtmf tone

        * @since Series60_2.7

        * @param  None.

        * @return None.  

        */

        IMPORT_C void StopDtmfTonePlay(); 

        /**

        * Plays given tone.

        * @since Series60_2.7

        * @param aToneName Tone sequence's name to be played.

        * @return None.

        */

        IMPORT_C void PlayInbandTone();

        /**

        * Stops the playing of inband tone

        * @since Series60_2.7

        * @param  None.

        * @return None.  

        */

        IMPORT_C void StopInbandTonePlay(); 

    protected:  // From CPEAudioData

        void DoHandleVolumeChange( TInt aVolume );

    private:

        /**

        * C++ default constructor.

        */

        CPEGsmAudioData( MPEPhoneModelInternal& aPhoneModel,

                         RFs& aFsSession );

        /**

        * By default Symbian 2nd phase constructor is private.

        */

        void ConstructL(CPEAudioFactory& aAudioFactory);

        /**

        * Checks if a DTMF tone may be played locally

        * The check is performed to prevent local play of dtmf tones sent by SAT application

        * during a SAT originated call

        *

        * @return ETrue: local play is allowed,

        *         EFalse: local play is not allowed

        */

        TBool DtmfLocalPlayAllowed() const;

    private:    //Data

        // CPEAudioDtmfTonePlayer is called to play the dtmf tones

        CPEAudioDtmfTonePlayer* iDtmfTonePlayer;

        // CPEAudioInbandTonePlayer is called to play the inband tones

        CPEAudioInbandTonePlayer* iInbandTonePlayer;

        // handle to a file server session

        RFs& iFsSession;

    };

#endif      //CPEGSMAUDIODATA_H  

// End of File