diff -r 000000000000 -r bde4ae8d615e os/mm/mmhais/refacladapt/src/audiogaincontrol/audiogaincontrol.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/os/mm/mmhais/refacladapt/src/audiogaincontrol/audiogaincontrol.h	Fri Jun 15 03:10:57 2012 +0200
@@ -0,0 +1,94 @@
+/*
+* 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:
+*
+*/
+
+
+
+#ifndef AUDIOGAINCONTROL_H
+#define AUDIOGAINCONTROL_H
+
+#include <e32base.h>
+#include <a3f/a3fbase.h>
+#include <a3f/maudiogaincontrol.h>
+#include <a3f/maudiogaincontrolobserver.h>
+
+#include "mgainhelper.h"
+
+#include <a3f/a3f_trace_utils.h>
+
+
+const TUint KDefaultGain = 5;
+const TUint KDefaultMaxGain = 255; // TODO should discover at run time but this is value of current Symbian sound driver adaptor
+const TUint KDefaultNumChannels = 2;
+const TUint KDefaultMaxRampTime = 5;
+
+enum TGainControlPanicCode
+	{
+	EAdaptationOldSetGainCalledPanic,
+	};
+
+/**
+ *  Implementation of audio gain control API.
+ *  ?more_complete_description
+ *  @lib audiogaincontrol.lib
+ */
+NONSHARABLE_CLASS(CAudioGainControl) : 	public CBase, public MAudioGainControl
+	{
+public:
+
+	IMPORT_C static CAudioGainControl* NewL();
+	/**
+	* Destructor.
+	*
+	* Deletes all objects and releases all resource owned by this instance.
+	*/
+	virtual ~CAudioGainControl();
+
+	IMPORT_C void SetHelper(MGainHelper& aHelper);
+
+	IMPORT_C void IssueGainChangedCallBack(TInt aError);
+
+	IMPORT_C TInt ConfigureRamp(TUid aRampOperation, const TTimeIntervalMicroSeconds& aRampDuration);
+
+	void IssueMaxGainChangedCallBack();
+	void IssueMaxRampTimeChangedCallBack();
+
+	// from base class MAudioGainControl
+	TInt GetMaxGain(TInt& aMaxGain) const;
+	TInt GetMaxRampTime(TTimeIntervalMicroSeconds& aMaxRampTime) const;
+	TInt SetGain(RArray<TAudioChannelGain>& aChannels, TUid aRampOperation, const TTimeIntervalMicroSeconds& aRampDuration);
+	TInt SetGain(RArray<TAudioChannelGain>& aChannels);
+	TInt GetGain(RArray<TAudioChannelGain>& aChannels) const;
+	TInt RegisterAudioGainControlObserver(MAudioGainControlObserver& aObserver);
+	void UnregisterAudioGainControlObserver(MAudioGainControlObserver& aObserver);
+
+private:
+	void ConstructL();
+
+	CAudioGainControl();
+
+private: //data
+	RArray<TAudioChannelGain> iGains;
+	/**
+	 * Reference to observer instance
+	 */
+	RPointerArray<MAudioGainControlObserver> iGainObservers;
+
+	// The gain cannot talk directly with the sound device driver so it needs a helper to request
+	MGainHelper*	iHelper;
+	};
+
+#endif // AUDIOGAINCONTROL_H