diff -r 000000000000 -r bde4ae8d615e os/mm/mmhais/a3facl/src/shared/audioprocessingunit.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/os/mm/mmhais/a3facl/src/shared/audioprocessingunit.h	Fri Jun 15 03:10:57 2012 +0200
@@ -0,0 +1,155 @@
+/*
+* Copyright (c) 2006-2009 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 AUDIOPROCESSINGUNIT_H
+#define AUDIOPROCESSINGUNIT_H
+
+#include <e32base.h>
+#include <ecom/ecom.h>
+#include <a3f/a3f_trace_utils.h>
+#include <a3f/audioprocessingunittypeuids.h>
+#include <a3f/maudioprocessingunit.h>
+#include <a3f/maudioprocessingunitobserver.h>
+
+#include "componentparameters.h"
+#include "mlogicalsettingsobserver.h"
+
+
+/**
+A generic AudioComponent base class implementation.
+@see MAudioProcessingUnit
+*/
+class CAudioProcessingUnit: public CBase, 
+							public MAudioProcessingUnit
+	{
+
+public:
+
+	static CAudioProcessingUnit* NewL(TComponentParameters aParameters);
+
+	/**
+	Destructor.
+	Releases all resources and deletes all objects owned by this instance.
+	*/
+	virtual ~CAudioProcessingUnit();
+
+	// from base class MAudioProcessingUnit
+	virtual TAudioComponentId InstanceId() const;
+	virtual TAudioContextId ContextId() const;
+	virtual TBool IsTypeOf(TUid aTypeId) const;
+	virtual TAny* Interface(TUid aType);
+	virtual TInt RegisterProcessingUnitObserver(MAudioProcessingUnitObserver& aObserver);
+	virtual void UnregisterProcessingUnitObserver(MAudioProcessingUnitObserver& aObserver);
+
+	CAudioProcessingUnit(TAny* aParam);
+
+protected: // data
+	// Component type Uid
+	TUid iType;
+
+	// Audio context Id
+	TAudioContextId iContextId;
+
+	// Component instance Id
+	TAudioComponentId iInstanceId;
+
+	// Array of component observers.
+	RPointerArray<MAudioProcessingUnitObserver> iAudioProcessingUnitObservers;
+
+	// Settings observer
+	MLogicalSettingObserver* iSettingsObserver;
+
+private: // data
+	TUid iDtor_ID_Key;
+	};
+
+// Interface's (abstract base class's) destructor
+inline CAudioProcessingUnit::~CAudioProcessingUnit()
+	{
+	iAudioProcessingUnitObservers.Close();
+	REComSession::DestroyedImplementation(iDtor_ID_Key);
+	}
+
+// Interface's (abstract base class's) static factory method implementation.
+// Asks ECOM plugin framework to instantiate appropriate concret plugin
+// implementation.
+inline CAudioProcessingUnit* CAudioProcessingUnit::NewL(TComponentParameters aParameters)
+	{	
+	TAny* ptr = REComSession::CreateImplementationL( aParameters.iTypeUid , _FOFF(CAudioProcessingUnit, iDtor_ID_Key), static_cast<TAny*>(&aParameters));
+	return static_cast<CAudioProcessingUnit*>(ptr);
+	}
+
+inline CAudioProcessingUnit::CAudioProcessingUnit(TAny* aParam)
+	{
+	TComponentParameters* param = static_cast<TComponentParameters*>(aParam);
+	iType = param->iTypeUid;
+	iInstanceId = param->iInstanceId;
+	iContextId = param->iContextId;
+	iSettingsObserver = param->iSettingsObserver;
+	}
+
+// ---------------------------------------------------------------------------
+// from class MAudioProcessingUnit
+// CLogicalAudioCodec::GetContextId
+// ---------------------------------------------------------------------------
+inline TAudioContextId CAudioProcessingUnit::ContextId() const
+	{
+	return iContextId;
+	}
+
+inline TAudioComponentId CAudioProcessingUnit::InstanceId() const 
+	{
+	return iInstanceId;
+	}
+
+// ---------------------------------------------------------------------------
+// from class MAudioProcessingUnit
+// CLogicalAudioCodec::RegisterComponentObserver
+// ---------------------------------------------------------------------------
+inline TInt CAudioProcessingUnit::RegisterProcessingUnitObserver(MAudioProcessingUnitObserver& aObserver)
+	{
+	TInt err = iAudioProcessingUnitObservers.Find(&aObserver);
+	if( err != KErrNotFound )
+		{
+		err = KErrAlreadyExists;
+		}
+	else
+		{
+		err = iAudioProcessingUnitObservers.Append(&aObserver);
+		}
+	return err;
+	}
+
+// ---------------------------------------------------------------------------
+// from class MAudioProcessingUnit
+// CLogicalAudioCodec::UnregisterComponentObserver
+// ---------------------------------------------------------------------------
+inline void CAudioProcessingUnit::UnregisterProcessingUnitObserver(MAudioProcessingUnitObserver& aObserver)
+	{
+	TInt idxOrErr = iAudioProcessingUnitObservers.Find(&aObserver);
+	if( idxOrErr != KErrNotFound )
+		{
+		iAudioProcessingUnitObservers.Remove(idxOrErr);
+		}
+	}
+
+inline TBool CAudioProcessingUnit::IsTypeOf(TUid) const {return EFalse;}
+inline TAny* CAudioProcessingUnit::Interface(TUid) { TAny* any(NULL); return any;}
+
+#endif // AUDIOPROCESSINGUNIT_H