diff -r 000000000000 -r bde4ae8d615e os/mm/mmhais/a3facl/src/audiogaincontrol/logicalaudiogaincontrol.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/os/mm/mmhais/a3facl/src/audiogaincontrol/logicalaudiogaincontrol.h	Fri Jun 15 03:10:57 2012 +0200
@@ -0,0 +1,111 @@
+/*
+* Copyright (c) 2004-2009 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:
+* Name        : logicalaudiogaincontrol.h
+* Part of     : ACL Logical Layer
+*
+*/
+
+
+
+#ifndef LOGICALAUDIOGAINCONTROL_H
+#define LOGICALAUDIOGAINCONTROL_H
+
+#include <e32base.h>
+#include <a3f/a3f_trace_utils.h>
+#include <a3f/a3fbase.h>
+#include <a3f/maudiogaincontrol.h>
+#include <a3f/maudiogaincontrolobserver.h>
+
+#include "audioprocessingunit.h"
+
+
+class MLogicalSettingObserver;
+
+/**
+Implementation of audio gain control API.
+
+@lib audiogaincontrol.lib
+*/
+
+NONSHARABLE_CLASS(CLogicalAudioGainControl) : 	public CAudioProcessingUnit,
+												public MAudioGainControl,
+												public MAudioGainControlObserver
+	{
+friend class CAudioContext;
+friend class CLogicalAudioStream;
+
+public:
+
+	/**
+	Destructor.
+
+	Deletes all objects and releases all resource owned by this instance.
+	*/
+	virtual ~CLogicalAudioGainControl();
+
+	// from base class MAudioGainControl
+	virtual TInt GetMaxGain(TInt& aMaxGain) const;
+	virtual TInt GetMaxRampTime(TTimeIntervalMicroSeconds& aMaxRampTime)const;
+	virtual TInt SetGain(RArray<TAudioChannelGain>& aChannels, TUid aRampOperation, const TTimeIntervalMicroSeconds& aRampDuration);
+	virtual TInt SetGain(RArray<TAudioChannelGain>& aChannels);
+	virtual TInt GetGain(RArray<TAudioChannelGain>& aChannels) const;
+	virtual TInt RegisterAudioGainControlObserver(MAudioGainControlObserver& aObserver);
+	virtual void UnregisterAudioGainControlObserver(MAudioGainControlObserver& aObserver);
+
+	// from base class CAudioProcessingUnit
+	virtual TBool IsTypeOf(TUid aTypeId) const;
+	virtual TAny* Interface(TUid aType);
+
+	// from base class MAudioGainControlObserver
+	void MaxRampTimeChanged(MAudioGainControl& aGain);
+	void MaxGainChanged(MAudioGainControl& aGain);
+	void GainChanged(MAudioGainControl& aGain, TInt aError);
+
+	/**
+	Create a new instance.
+
+	@param aGaincontrol the gain implementation. Ownership of the pointer
+			is transferred to the  create CAudioGainControl object instance.
+	@return CAudioGainControl* a pointer to the created instance.
+	*/
+	static CLogicalAudioGainControl* NewL(TAny* aParam);
+
+
+private:
+
+	void ConstructL();
+
+	CLogicalAudioGainControl(TAny* aParam);
+
+protected:
+	RArray<TAudioChannelGain> iActiveChannels;
+
+	RArray<TAudioChannelGain> iDesiredChannels;
+
+	TTimeIntervalMicroSeconds iDesiredRampTime;
+
+	TUid iDesiredRampOperation;
+
+private:
+	// Maximum value for ramp time
+	TTimeIntervalMicroSeconds iMaxRampTime;
+
+	// The adaptation gain control
+	MAudioGainControl* iAdaptationGain;
+
+	RPointerArray<MAudioGainControlObserver> iGainObservers;
+	};
+
+#endif // LOGICALAUDIOGAINCONTROL_H