/*

* Copyright (c) 2004 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:  File Audio Output

*

*/

#ifndef CFAOASYNCHHANDLER_H

#define CFAOASYNCHHANDLER_H

// INCLUDES

#include <e32base.h>

// CONSTANTS

const TInt KIOError        	= 1;

// CLASS DECLARATION

/**

*  Interface class to be implemented by observer of the File Audio Output events generator.

*  @since 3.0

*/

class MFAOEventGeneratorObserver

    {

    public:

        /**

        * Indicates the type of error if any.

        * @since 3.0

        * @param aResult A system-wide error code.

        * @return none

        */

        virtual void IOError(TInt aResult) = 0;

    };

/**

*  CFAOEventGenerator

*

*  @lib FileAudioOutput.lib

*  @since 3.0

*/

class CFAOEventGenerator : public CActive

    {

    public:

        /**

        * Two-phased constructor.

        */

        static CFAOEventGenerator* NewL(MFAOEventGeneratorObserver& aObserver);

        /**

        * Request to generate event

        * @aEvent The event to generate

        * @aError The error to report with the event

        * @since 3.0

        */

        void GenerateEvent(TInt aEvent, TInt aError);

        virtual ~CFAOEventGenerator();

    private:

        /**

        * C++ default constructor.

        */

        CFAOEventGenerator(MFAOEventGeneratorObserver& aObserver);

        /**

        * By default Symbian 2nd phase constructor is private.

        */

        void ConstructL();

        void RunL();

        void DoCancel();

        /**

        * Used to complete a request

        */

        void Ready(const TInt aStatus);

    private:

    	// The requested event

    	TInt iEvent;

    	// Error indicator

    	TInt iError;

        // Pointer to observer object

        MFAOEventGeneratorObserver* iObserver;

    };

#endif 		// CFAOASYNCHHANDLER_H