// 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:

//

#ifndef __MNGREADSTREAM_H__

#define __MNGREADSTREAM_H__

/** 	@file

	@internalTechnology */

#include <caf/content.h>

#include "InputStream.h"

class CMngFileReadStream : protected CBase, public MInputStream

	{

public:

static CMngFileReadStream* NewL(ContentAccess::CData* aCafData);

static CMngFileReadStream* NewL(const TDesC8& aData);

	virtual TInt DataAvailable();

	virtual void WaitForData(TInt aDataNeeded, TRequestStatus& aReq);

	virtual void SeekL(TInt aPosition);

	virtual TInt Tell();

	virtual void Read(TDes8& aBuf, TRequestStatus& aReq, TInt32* aCrc=NULL);

	virtual void ReadL(TDes8& aBuf, TInt32* aCrc=NULL);

	virtual void ReadInt32L(TInt32& aNumber, TInt32* aCrc=NULL);

	virtual void ReadUint16L(TUint16& aNumber, TInt32* aCrc=NULL);

	virtual void ReadUint8L(TUint8& aNumber, TInt32* aCrc=NULL);

	virtual void ReadInt32L(TInt32* aFirst, TInt aCount, TInt32* aCrc=NULL);

	virtual void ReadUint16L(TUint16* aFirst,TInt aCount, TInt32* aCrc=NULL);

	virtual void ReadUint8L(TUint8* aFirst, TInt aCount, TInt32* aCrc=NULL);

	virtual void Release();

	virtual void AddRef();

protected:

	inline explicit CMngFileReadStream(ContentAccess::CData* aCafData=NULL);

	~CMngFileReadStream();

	void ConstructL(const TDesC8& aData);

protected:

	TPtrC8	iMemBuf;

	TInt	iPosition;	// read position within the current buffer i.e. iMemBuf

private:

	void ConstructL();

private:

	HBufC8* iOwnedData;

	ContentAccess::CData* iCafData;

	TInt	iRefCount;

	};

inline 

CMngFileReadStream::CMngFileReadStream(ContentAccess::CData* aCafData):

															iCafData(aCafData),iRefCount(1)

	{

	}

/**

	Implementation of MInputStream interface for MNG player that

	provides with adaptation over the ICL framework data reading 

	interface

*/

class CMngIclReadStream: public CMngFileReadStream 

	{

public:

	static CMngIclReadStream* NewL(MDataFeed& aDataSupplier);

	virtual void WaitForData(TInt aDataNeeded, TRequestStatus& aReq);

	virtual void SeekL(TInt aPosition);

	virtual TInt Tell();

	void InvalidateBuffer();

	void RestartL();

	void Reset();

protected:

	inline explicit CMngIclReadStream(MDataFeed& aDataSupplier);

private:

	void ConstructL();

private:

	MDataFeed&	iDataSupplier;

	TInt		iOverallPosition;	// offset of the data held in the iMemBuf within the image data

	};

inline 

CMngIclReadStream::CMngIclReadStream(MDataFeed& aDataSupplier):

													CMngFileReadStream(NULL),iDataSupplier(aDataSupplier)

	{

	}

#endif // ndef __MNGREADSTREAM_H__