// Copyright (c) 2003-2009 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 __MMFSWCODECCONVERTDATAPATH_H__

#define __MMFSWCODECCONVERTDATAPATH_H__

#include <e32base.h>

#include "mmfSwCodecDataPath.h"

/**

 *  Derived class for convert datapath internal to the Sw codec wrapper

 *  @internalComponent

 */

class CMMFSwCodecConvertDataPath : public CMMFSwCodecDataPathX

	{ 

public:	

	static CMMFSwCodecConvertDataPath* NewL();

	virtual ~CMMFSwCodecConvertDataPath(); 

	virtual TInt SetObserver(MMMFHwDeviceObserver &aHwObserver);

	virtual TInt AddCodec(CMMFSwCodec& aCodec);

	virtual TInt Start();

	virtual void Stop();

	virtual void Pause();

	virtual void BufferFilledL(CMMFDataBuffer& aBuffer);

	virtual void BufferEmptiedL(const CMMFDataBuffer& aBuffer);	

	virtual void SoundDeviceException(TInt aError);

	virtual RMdaDevSound& Device();

	void FillSourceBufferL();

	void FillSinkBufferL();

	void EmptySinkBufferL();

private:	

	CMMFSwCodecConvertDataPath() {};

	void ConstructL();	

private: 

	/**

     * Private class for the convert datapath that is an active object

	 * used to drive the conversion.  This class performs the main data transfer

	 * between the source and the sink.

     * This is done in a separate class as opposed to CMMFSwCodecConvertDataPath

     * because the class needs to be an active object to avoid recursive call stacks

     * in cases where the source and sink are not active objects - which is

     * the case with descriptors.  Making CMMFSwCodecConvertDataPath derive

     * from CActive is less desirable as it would involve multiple inheretence

     * @internalComponent

     */

	class CDataPathConverter : public CActive

	{

	public:

		enum TConvertState

		{

		EIdle,

		EFillingSourceBuffer,

		EFillingSinkBuffer,

		EEmptyingSinkBuffer

		};

	public:

		CDataPathConverter(CMMFSwCodecConvertDataPath& aParent, TInt aPriority);

		~CDataPathConverter();

		void Start();

		void BufferFilledL(CMMFDataBuffer& aBuffer);

		void BufferEmptiedL(CMMFDataBuffer& aBuffer);

		void ChangeConvertState(TConvertState aNewConvertState);

		//CActive

		virtual void RunL();

		virtual TInt RunError(TInt aError);

		virtual void DoCancel();

	private:	

		void FillSourceBufferL();

		void FillSinkBufferL();

		void EmptySinkBufferL();

	private:

		TConvertState iConvertState;

		CMMFSwCodecConvertDataPath& iParent;

		CMMFDataBuffer* iSourceBuffer;

	};

private: 

	CDataPathConverter* iDataPathConverter;

	CMMFDataBuffer* iSourceBuffer;

	CMMFDataBuffer* iSinkBuffer;

	TBool iNoMoreSourceData;

	TUint iSinkBufferSize;

	TUint iSourceBufferSize;

	RMdaDevSound iDummyDevSound;//don't need a devsound for convert

	};

#endif