sl@0: //a3ffourcclookup.h
sl@0: 
sl@0: // Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: //
sl@0: 
sl@0: /**
sl@0:  @file
sl@0:  @internalTechnology 
sl@0: */
sl@0: 
sl@0:  
sl@0: #ifndef A3FFOURCCLOOKUP_H
sl@0: #define A3FFOURCCLOOKUP_H
sl@0: 
sl@0: //INCLUDES
sl@0: #include <ecom/ecom.h>
sl@0: #include <mmf/common/mmfutilities.h>
sl@0: #include <e32hashtab.h> 
sl@0: #include <a3f/a3fbase.h>
sl@0: 
sl@0: //CLASS DECLARATION
sl@0: /*
sl@0: CFourCCConvertor class
sl@0: This is a class used to load the format Uids and fourCC codes in to Cache Table.
sl@0: This class is used for resolution of the fourCC code corresponding to format UID and vice-versa.
sl@0: */ 
sl@0: class CFourCCConvertor : public CBase
sl@0: 	{
sl@0: public: 
sl@0: 	/*
sl@0: 	Create a Single instance of a class.If the instance is already created, It
sl@0: 	returns that instance.
sl@0: 	*/
sl@0: 	IMPORT_C static CFourCCConvertor* NewL();
sl@0: 	
sl@0: 	/*
sl@0: 	This method is used to find fourCC code corresponding to format Uid from cache table.
sl@0: 	@param TUid aFormat a unique format Uid.
sl@0: 	@param TFourCC &aFourCC The unique FourCC code.
sl@0: 	@return an error code. KErrNone if successful, otherwise one of the system wide error codes.
sl@0: 	*/
sl@0: 	IMPORT_C TInt FormatToFourCC(TUid aFormat,TFourCC &aFourCC);
sl@0: 
sl@0: 	/*
sl@0: 	This method is used to find format Uid corresponding to fourCC Code from cache table.
sl@0: 	@param TFourCC &aFourCC The unique FourCC code.
sl@0: 	@param TUid aFormat a unique format Uid.
sl@0: 	@return an error code. KErrNone if successful, otherwise one of the system wide error codes.
sl@0: 	*/
sl@0: 	IMPORT_C TInt FourCCToFormat(TFourCC aFourCC, TUid &aFormat) const;
sl@0: 
sl@0: 	/*
sl@0:  	Destructor    
sl@0: 	*/
sl@0: 	virtual ~CFourCCConvertor();
sl@0: 
sl@0: private:
sl@0: 	/*
sl@0: 	Constructor
sl@0: 	*/
sl@0: 	CFourCCConvertor();
sl@0: 
sl@0: 	/*
sl@0: 	Second Phase Constructor
sl@0: 	*/
sl@0: 	void ConstructL();
sl@0: 
sl@0: 	/*
sl@0: 	This method is used to initialize the cache tables. This method uses two cache
sl@0: 	tables. It Stores Format Uids corresponding to fourCC Codes in one cache table
sl@0: 	and fourCC codes corresponding to Format Uids in another cache table. In the First 
sl@0: 	cache table,it uses format Uid as key and in the second cache table, it uses fourCC code as key. 
sl@0: 	*/
sl@0: 	void LoadL();
sl@0: 
sl@0:     // DATA DECLARATION
sl@0: 
sl@0: 	/* Cache Table that stores FourCC codes corresponding to Format Uids */
sl@0: 	RHashMap<TUint32,TUint32> *iHashFourCCToFormat;
sl@0: 	
sl@0: 	/* Cache Table that stores format Uids corresponding to FourCC codes */
sl@0: 	RHashMap<TUint32,TUint32> *iHashFormatToFourCC;
sl@0: 
sl@0: 	};
sl@0: 
sl@0: #endif // A3FFOURCCLOOKUP_H