// Copyright (c) 2005-2009 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 __MMFBTSWCODECDATAPATH_H__

#define __MMFBTSWCODECDATAPATH_H__

#include <e32base.h>

#include <mmf/server/mmfdatabuffer.h>

class MMMFHwDeviceObserver;

class CMMFSwCodec;

/**

 *  Base class for the datapath internal to the Sw codec wrapper

 *  @internalComponent

 */

class CMMFSwCodecDataPath : public CBase

	{ 

public: 

	enum TSwCodecDataPathState

	{

	EStopped,

	EPlaying,

	EPaused

	};

public:	

	virtual	~CMMFSwCodecDataPath(); 

	virtual TInt SetObserver(MMMFHwDeviceObserver& aHwObserver) = 0;

	virtual TInt AddCodec(CMMFSwCodec& aCodec) = 0;

	virtual TInt Start() = 0;

	virtual void Stop() = 0;

	virtual void Pause() = 0;

	virtual void BufferFilledL(CMMFDataBuffer& aBuffer) = 0;

	virtual void BufferEmptiedL(const CMMFDataBuffer& aBuffer) = 0;

	virtual void SoundDeviceException(TInt aError) = 0;

	virtual TSwCodecDataPathState State() {return iState;};

protected:	

	CMMFSwCodecDataPath() {};

	inline void Panic(TInt aPanicCode);

	void ConstructL();

#ifdef __CYCLE_MMF_DATABUFFERS__

	CMMFDataBuffer* CycleAudioBuffer(CMMFDataBuffer* aBuffer);

#endif

#ifdef __USE_MMF_TRANSFERBUFFERS__

	CMMFTransferBuffer* CreateTransferBufferL(TUint aBufferSize, CMMFTransferBuffer* aOldBuffer);

#endif

#ifdef __USE_MMF_PTRBUFFERS__

	CMMFPtrBuffer* CreatePtrBufferL(TUint aBufferSize);

#endif

protected: 

	TSwCodecDataPathState iState;

	MMMFHwDeviceObserver* iHwDeviceObserver;

	CMMFSwCodec* iCodec;

#ifdef __USE_MMF_TRANSFERBUFFERS__

	RTransferBuffer* iTransferBuffer;

	RTransferWindow* iTransferWindow;

#endif

#ifdef __USE_MMF_PTRBUFFERS__

	HBufC8* iPtrBufferMemoryBlock;

#endif

	};

/**

 * Internal panic

 * @internalComponent

 */

inline void CMMFSwCodecDataPath::Panic(TInt aPanicCode)

	{

	_LIT(KMMFSwCodecWrapperPanicCategory, "MMFSwCodecWrapper");

	User::Panic(KMMFSwCodecWrapperPanicCategory, aPanicCode);

	}

#endif