--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mmplugins/imagingplugins/imagedisplay/plugins/mng/InputStream.h	Tue Feb 02 01:56:55 2010 +0200
@@ -0,0 +1,62 @@
+// 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 __INPUTSTREAM_H__
+
+#define __INPUTSTREAM_H__
+
+/** 	@file
+	@internalTechnology */
+
+class MInputStream 
+	{
+public:
+	virtual TInt DataAvailable()=0;
+	virtual void WaitForData(TInt aDataNeeded, TRequestStatus& aReq)=0;
+
+	virtual void SeekL(TInt aPosition)=0;
+	virtual TInt Tell()=0;
+
+	virtual void Read(TDes8& aBuf, TRequestStatus& aReq, TInt32* aCrc=NULL)=0;
+	virtual void ReadL(TDes8& aBuf, TInt32* aCrc=NULL)=0;
+
+	virtual void ReadInt32L(TInt32& aNumber, TInt32* aCrc=NULL)=0;
+	virtual void ReadUint16L(TUint16& aNumber, TInt32* aCrc=NULL)=0;
+	virtual void ReadUint8L(TUint8& aNumber, TInt32* aCrc=NULL)=0;
+
+	virtual void ReadInt32L(TInt32*, TInt aCount, TInt32* aCrc=NULL)=0;
+	virtual void ReadUint16L(TUint16*,TInt aCount, TInt32* aCrc=NULL)=0;
+	virtual void ReadUint8L(TUint8*, TInt aCount, TInt32* aCrc=NULL)=0;
+	
+	// object control
+	virtual void Release()=0;
+	virtual void AddRef()=0;
+	};
+	
+/**
+	Interface that can be used as a data supplier for MInputStream
+	implementation
+*/
+class MDataFeed
+	{
+public:
+	/**
+		Should be used to provide interface client with guarantee that data will stay
+		in buffer indefinitely.
+	*/
+	virtual TInt LockBuffer(TInt aPosition, TPtrC8& aBuffer, TInt aBytesToLock) = 0;
+	};
+
+#endif // ndef __INPUTSTREAM_H__