/*

* Copyright (c) 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 CMETADATA_UTILITY_ITF_H

#define CMETADATA_UTILITY_ITF_H

#ifdef __cplusplus

#include <e32base.h>

#include <e32std.h>

#include <e32hashtab.h>

#include <OpenMAXAL.h>

#include <Hxmetadatautil.h>

#include <MetaDataUtility.h>

#include <MetaDataFieldContainer.h>

#include <MetaDataField.hrh>

#define MAX_EXTENSION_SIZE 10

#define uint32 unsigned int

class CS60MetadataUtilityItf;

class CHXMetadataUtilityItf;

NONSHARABLE_CLASS(CMetadataUtilityItf)

{

public:

	enum TValueEncodingType

	{

		EUnknownEncoding,

		EAsciiEncoding,

		EUnicodeEncoding,

		EBinaryEncoding,	

	};

	static CMetadataUtilityItf* New(char* uri);

	CMetadataUtilityItf();

	virtual ~CMetadataUtilityItf();

	TInt ParseSource(char* uri);

	TInt OpenSource(char* uri);	

	TInt CalculateNumMetadataItems(TUint*);

	char* GetKey(TInt index);

	TInt GetValueSize(TInt index);

	TInt GetValue(TInt index, char* data, TInt maxLength, TInt* outSize, TInt* encodingType);

	//helper function

	//extracts left part of input descriptor upto (maxLen-1) and copies content in outPtr

	//append a null terminator

	static TInt ExtractUCS2(TDesC& inDes, char* outPtr,TInt maxLen);

private:

	CS60MetadataUtilityItf* m_pS60Util;

	CHXMetadataUtilityItf*  m_pHXUtil;

};

NONSHARABLE_CLASS(CS60MetadataUtilityItf)

{

public:

	static CS60MetadataUtilityItf* New();

  	~CS60MetadataUtilityItf();

	TInt CalculateNumMetadataItems(TUint*);

	char* GetKey(TInt index);

	TInt  GetValueSize(TInt index);

	TInt  GetValue(TInt index, char* data, TInt maxLength, TInt* outSize, TInt* encodingType);

	TInt 	ParseSource(TDesC&);

	char* KeyMapping(TMetaDataFieldId);

	TInt  ValueEncoding(TMetaDataFieldId);

	static bool IsSupportedExtension(char* extn);

	TInt Reset();

private:

    CS60MetadataUtilityItf();

    void ConstructL();

   	CMetaDataUtility* pMetaDataUtility; //S60MetadataUtility

	TUint 		uNumMetadataItems;		

};

NONSHARABLE_CLASS(CHXMetadataUtilityItf)

{

public:

	static CHXMetadataUtilityItf* New();

  ~CHXMetadataUtilityItf();

	TInt CalculateNumMetadataItems(TUint*);

	char* GetKey(TInt index);

	TInt ValueEncoding(HXMetaDataKeys::EHXMetaDataId fldID);

	TInt  GetValueSize(TInt index);

	TInt  GetValue(TInt index, char* data, TInt maxLength, TInt* outSize, TInt* encodingType);

	TInt 	ParseSource(TDesC&);

	char* KeyMapping(HXMetaDataKeys::EHXMetaDataId);

	TInt Reset();

private:

	CHXMetadataUtilityItf();

    void ConstructL();

  CHXMetaDataUtility *pHXMetaDataUtility;

  TUint 	  uNumMetadataItems;	  

};

#else

extern void* mmf_metadata_utility_init(char*);

extern void  mmf_metadata_utility_destroy(void* context);

extern XAresult mmf_metadata_utility_parse_source(void* , char*);

extern XAresult  mmf_get_item_count(void* context, XAuint32* itemCount);

extern XAresult  mmf_get_key_size(void* context, XAuint32 keyIndex, XAuint32* keySize);

extern XAresult  mmf_get_key(void* context, XAuint32 index,XAuint32 keySize, XAMetadataInfo *pKey);

extern XAresult  mmf_get_value_size(void* context, XAuint32 index, XAuint32 *pValueSize);

extern XAresult  mmf_get_value(void* context, XAuint32 index, XAuint32 valueSize, XAMetadataInfo *pValue);

#endif //__cplusplus

#endif