sl@0: /*
sl@0: * Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: * All rights reserved.
sl@0: * This component and the accompanying materials are made available
sl@0: * under the terms of "Eclipse Public License v1.0"
sl@0: * which accompanies this distribution, and is available
sl@0: * at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: *
sl@0: * Initial Contributors:
sl@0: * Nokia Corporation - initial contribution.
sl@0: *
sl@0: * Contributors:
sl@0: *
sl@0: * Description:
sl@0: * Save as expressly licensed to you by Symbian Software Ltd, all rights reserved.
sl@0: * 
sl@0: *
sl@0: */
sl@0: 
sl@0: 
sl@0: 
sl@0: /**
sl@0:  @file
sl@0:  @publishedPartner
sl@0:  @released
sl@0: */
sl@0: 
sl@0: #ifndef MAUDIOCODECOBSERVER_H
sl@0: #define MAUDIOCODECOBSERVER_H
sl@0: 
sl@0: #include <e32base.h>
sl@0: #include <a3f/a3fbase.h>
sl@0: 
sl@0: /**
sl@0:  *  An interface to a set of AudioGainControl callback functions.
sl@0:  *
sl@0:  *  This serves as the method of communication between the client and the
sl@0:  *  AudioGainControl.
sl@0:  *
sl@0:  *  The class is a mixin and is intended to be inherited by the client class
sl@0:  *  that is interested in observing the Gain operations. The functions
sl@0:  *  encapsulated by this class are called when specific events occur while
sl@0:  *  processing audio.
sl@0:  *
sl@0:  */
sl@0: class MAudioCodecObserver
sl@0: 	{
sl@0: public:
sl@0: 
sl@0: 	/**
sl@0: 	* Callback showing completion SetSampleRate().
sl@0: 	*
sl@0: 	* @param aError will be KErrNone if the action succeeded, otherwise it will be a system error
sl@0: 	* specific errors to be defined.
sl@0: 	*/
sl@0: 	virtual void SampleRateSet(TInt aError)=0;
sl@0: 
sl@0: 	/**
sl@0: 	* Callback showing completion SetMode().
sl@0: 	*
sl@0: 	* @param aError will be KErrNone if the action succeeded, otherwise it will be a system error
sl@0: 	* specific errors to be defined.
sl@0: 	*/
sl@0: 	virtual void ModeSet(TInt aError)=0;
sl@0: 
sl@0: 	/**
sl@0: 	* Callback showing completion GetSupportedSampleRates().
sl@0: 	*
sl@0: 	* @param Error will be KErrNone if the action succeeded, otherwise it will be a system error 
sl@0: 	* specific errors to be defined. If aError is not KErrNone, then the state of aSupportedRates is undefined.
sl@0: 	*/
sl@0: 	virtual void GetSupportedSampleRatesComplete (TInt aError)=0;
sl@0: 
sl@0: 	/**
sl@0: 	* Callback showing completion GetSupportedModes().
sl@0: 	*
sl@0: 	* @param aError will be KErrNone if the action succeeded, otherwise it will be a system error
sl@0: 	* specific errors to be defined. If aError is not KErrNone, then the state of aSupportedModes is undefined.
sl@0: 	*/
sl@0: 	virtual void GetSupportedModesComplete (TInt aError)=0;
sl@0: 
sl@0: 	};
sl@0: 
sl@0: #endif // MAUDIOCODECOBSERVER_H
sl@0: