/*

* Copyright (c) 2007-2009 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:

* Save as expressly licensed to you by Symbian Software Ltd, all rights reserved.

* 

*

*/

/**

 @file

 @publishedPartner

 @released

*/

#ifndef MAUDIOCODECOBSERVER_H

#define MAUDIOCODECOBSERVER_H

#include <e32base.h>

#include <a3f/a3fbase.h>

/**

 *  An interface to a set of AudioGainControl callback functions.

 *

 *  This serves as the method of communication between the client and the

 *  AudioGainControl.

 *

 *  The class is a mixin and is intended to be inherited by the client class

 *  that is interested in observing the Gain operations. The functions

 *  encapsulated by this class are called when specific events occur while

 *  processing audio.

 *

 */

class MAudioCodecObserver

	{

public:

	/**

	* Callback showing completion SetSampleRate().

	*

	* @param aError will be KErrNone if the action succeeded, otherwise it will be a system error

	* specific errors to be defined.

	*/

	virtual void SampleRateSet(TInt aError)=0;

	/**

	* Callback showing completion SetMode().

	*

	* @param aError will be KErrNone if the action succeeded, otherwise it will be a system error

	* specific errors to be defined.

	*/

	virtual void ModeSet(TInt aError)=0;

	/**

	* Callback showing completion GetSupportedSampleRates().

	*

	* @param Error will be KErrNone if the action succeeded, otherwise it will be a system error 

	* specific errors to be defined. If aError is not KErrNone, then the state of aSupportedRates is undefined.

	*/

	virtual void GetSupportedSampleRatesComplete (TInt aError)=0;

	/**

	* Callback showing completion GetSupportedModes().

	*

	* @param aError will be KErrNone if the action succeeded, otherwise it will be a system error

	* specific errors to be defined. If aError is not KErrNone, then the state of aSupportedModes is undefined.

	*/

	virtual void GetSupportedModesComplete (TInt aError)=0;

	};

#endif // MAUDIOCODECOBSERVER_H