sl@0: /*
sl@0: * Copyright (c) 2004-2009 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: * Name        : logicalbuffersource.h
sl@0: * Part of     : ACL Logical Layer
sl@0: *
sl@0: */
sl@0: 
sl@0: 
sl@0: 
sl@0: #ifndef LOGICALBUFFERSOURCE_H
sl@0: #define LOGICALBUFFERSOURCE_H
sl@0: 
sl@0: #include <e32base.h>
sl@0: #include <f32file.h>
sl@0: #include <a3f/a3f_trace_utils.h>
sl@0: #include <a3f/mbuffersource.h>
sl@0: #include <a3f/maudiodatasupplier.h>
sl@0: 
sl@0: #include "audioprocessingunit.h"
sl@0: 
sl@0: #include <a3f/maudioprocessingunitobserver.h>
sl@0: 
sl@0: 
sl@0: class MLogicalSettingObserver;
sl@0: 
sl@0: /**
sl@0: 
sl@0: */
sl@0: NONSHARABLE_CLASS(CLogicalBufferSource) :	public CAudioProcessingUnit,
sl@0: 											public MMMFBufferSource,
sl@0: 											public MMMFAudioDataSupplier
sl@0: 	{
sl@0: friend class CAudioContext;
sl@0: friend class CLogicalAudioStream;
sl@0: public:
sl@0: 
sl@0: 	/**
sl@0: 	Destructor.
sl@0: 
sl@0: 	Deletes all objects and releases all resource owned by this instance.
sl@0: 	*/
sl@0: 	virtual ~CLogicalBufferSource();
sl@0: 
sl@0: 	// from MMMFBufferSource
sl@0: 	virtual TInt SetDataSupplier(MMMFAudioDataSupplier& aSupplier);
sl@0: 	virtual TInt BufferFilled(CMMFBuffer* aBuffer);
sl@0: 	virtual TInt BuffersDiscarded();
sl@0: 
sl@0: 	// from CAudioProcessingUnit
sl@0: 	virtual TBool IsTypeOf(TUid aTypeId) const;
sl@0: 	virtual TAny* Interface(TUid aType);
sl@0: 
sl@0: 	// from MMMFDataSupplier
sl@0: 	virtual void BufferToBeFilled(MMMFBufferSource* aSource, CMMFBuffer* aBuffer);
sl@0: 	virtual void DiscardBuffers(MMMFBufferSource* aSource);
sl@0: 
sl@0: 	/**
sl@0: 	Create a new instance.
sl@0: 
sl@0: 	@return CBufferSource* a pointer to the created instance.
sl@0: 	*/
sl@0: 	static CLogicalBufferSource* NewL(TAny* aParameters);
sl@0: 
sl@0: private:
sl@0: 	void ConstructL();
sl@0: 
sl@0: 	CLogicalBufferSource(TAny* aParameters);
sl@0: 
sl@0: protected:
sl@0: 	// The adaptation buffer source
sl@0: 	MMMFBufferSource* iAdaptationBufferSource;
sl@0: 
sl@0: private:
sl@0: 	// The client which provides data
sl@0: 	MMMFAudioDataSupplier* iSupplier;
sl@0: 	};
sl@0: 
sl@0: #endif // LOGICALBUFFERSOURCE_H