/*

* 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        : logicalbuffersink.h

* Part of     : ACL Logical Layer

*

*/

#ifndef LOGICALBUFFERSINK_H

#define LOGICALBUFFERSINK_H

#include <e32base.h>

#include <f32file.h>

#include <a3f/a3f_trace_utils.h>

#include <a3f/mbuffersink.h>

#include <a3f/maudiodataconsumer.h>

#include "audioprocessingunit.h"

#include <a3f/maudioprocessingunitobserver.h>

class MLogicalSettingObserver;

/**

This is the implementation of CAudioSink API.

@see CAudioComponent

*/

NONSHARABLE_CLASS(CLogicalBufferSink) : public CAudioProcessingUnit,

										public MMMFBufferSink,

										public MMMFAudioDataConsumer

	{

friend class CAudioContext;

friend class CLogicalAudioStream;

public:

	/**

	Destructor.

	Deletes all objects and releases all resource owned by this instance.

	*/

	virtual ~CLogicalBufferSink();

	// from class MBufferSink

	TInt SetDataConsumer(MMMFAudioDataConsumer& aConsumer);

	TInt BufferEmptied(CMMFBuffer* aBuffer);

	TInt BuffersDiscarded();

	// from class CAudioProcessingUnit

	virtual TBool IsTypeOf(TUid aTypeId) const;

	virtual TAny* Interface(TUid aType);

	// from MMMFAudioDataConsumer

	void BufferToBeEmptied(MMMFBufferSink* aSink, CMMFBuffer* aBuffer);

	void DiscardBuffers(MMMFBufferSink* aSink);

	/**

	Create a new instance.

	@return CBufferSink* a pointer to the created instance.

	*/

	static CLogicalBufferSink* NewL(TAny* aParameters);

private:

	void ConstructL();

	CLogicalBufferSink(TAny* aParameters);

protected:

	// The adaptation buffer sink

	MMMFBufferSink* iAdaptationBufferSink;

private:

	// The client which requests data

	MMMFAudioDataConsumer *iConsumer;

	CMMFBuffer* iBuffer;

	};

#endif // LOGICALBUFFERSINK_H