/*

* 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