diff -r 000000000000 -r bde4ae8d615e os/mm/mmhais/a3facl/src/buffersource/logicalbuffersource.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/os/mm/mmhais/a3facl/src/buffersource/logicalbuffersource.h	Fri Jun 15 03:10:57 2012 +0200
@@ -0,0 +1,90 @@
+/*
+* 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        : logicalbuffersource.h
+* Part of     : ACL Logical Layer
+*
+*/
+
+
+
+#ifndef LOGICALBUFFERSOURCE_H
+#define LOGICALBUFFERSOURCE_H
+
+#include <e32base.h>
+#include <f32file.h>
+#include <a3f/a3f_trace_utils.h>
+#include <a3f/mbuffersource.h>
+#include <a3f/maudiodatasupplier.h>
+
+#include "audioprocessingunit.h"
+
+#include <a3f/maudioprocessingunitobserver.h>
+
+
+class MLogicalSettingObserver;
+
+/**
+
+*/
+NONSHARABLE_CLASS(CLogicalBufferSource) :	public CAudioProcessingUnit,
+											public MMMFBufferSource,
+											public MMMFAudioDataSupplier
+	{
+friend class CAudioContext;
+friend class CLogicalAudioStream;
+public:
+
+	/**
+	Destructor.
+
+	Deletes all objects and releases all resource owned by this instance.
+	*/
+	virtual ~CLogicalBufferSource();
+
+	// from MMMFBufferSource
+	virtual TInt SetDataSupplier(MMMFAudioDataSupplier& aSupplier);
+	virtual TInt BufferFilled(CMMFBuffer* aBuffer);
+	virtual TInt BuffersDiscarded();
+
+	// from CAudioProcessingUnit
+	virtual TBool IsTypeOf(TUid aTypeId) const;
+	virtual TAny* Interface(TUid aType);
+
+	// from MMMFDataSupplier
+	virtual void BufferToBeFilled(MMMFBufferSource* aSource, CMMFBuffer* aBuffer);
+	virtual void DiscardBuffers(MMMFBufferSource* aSource);
+
+	/**
+	Create a new instance.
+
+	@return CBufferSource* a pointer to the created instance.
+	*/
+	static CLogicalBufferSource* NewL(TAny* aParameters);
+
+private:
+	void ConstructL();
+
+	CLogicalBufferSource(TAny* aParameters);
+
+protected:
+	// The adaptation buffer source
+	MMMFBufferSource* iAdaptationBufferSource;
+
+private:
+	// The client which provides data
+	MMMFAudioDataSupplier* iSupplier;
+	};
+
+#endif // LOGICALBUFFERSOURCE_H