--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mmplugins/imagingplugins/codecs/JPEGCodec/Exif/exifreaderwriter.h	Tue Feb 02 01:56:55 2010 +0200
@@ -0,0 +1,122 @@
+// 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 EXIFREADERWRITER_H
+#define EXIFREADERWRITER_H
+
+#include <iclexif.h> // For MExifMetadata declaration
+
+// Forward declarations
+class CIfdGeneral;
+class CIfd0;
+class CIfd1;
+class CExifIfd;
+class CInteropIfd;
+class CGpsIfd;
+
+class CExifReaderWriter : public CBase, public MExifMetadata
+	{
+public:
+	friend class CExifVerifier;
+		
+public:
+	~CExifReaderWriter();
+	
+	// Functions derived from MExifMetaData
+	TInt GetIntegerParam(TUint aTag, TUint aIfd, TInt& aParam) const;
+	TInt GetShortParam(TUint aTag, TUint aIfd, TUint16& aParam) const;
+	TInt GetRationalParam(TUint aTag, TUint aIfd, TInt& aNumer, TInt& aDenom) const;
+	TInt GetParam8(TUint aTag, TUint aIfd, HBufC8*& aParam) const;
+	TInt GetParam16(TUint aTag, TUint aIfd, HBufC16*& aParam) const;
+	TInt GetIntegerArrayParam(TUint aTag, TUint aIfd, CArrayFix<TInt>& aParam) const;
+	TInt GetShortArrayParam(TUint aTag, TUint aIfd, CArrayFix<TUint16>& aParam) const;
+	TInt GetRationalArrayParam(TUint aTag, TUint aIfd, CArrayFix<TRational>& aParam) const;
+	
+	TInt SetParam8(TUint aTag, TUint aIfd, HBufC8* aParam);
+	TInt SetParam16(TUint aTag, TUint aIfd, HBufC16* aParam);
+	TInt SetIntegerParam(TUint aTag, TUint aIfd, TInt aParam);
+	TInt SetShortParam(TUint aTag, TUint aIfd, TUint16 aParam);
+	TInt SetRationalParam(TUint aTag, TUint aIfd, TInt aNumerator, TInt aDenominator);	
+	TInt SetIntegerArrayParam(TUint aTag, TUint aIfd, CArrayFix<TInt>& aParam);
+	TInt SetShortArrayParam(TUint aTag, TUint aIfd, CArrayFix<TUint16>& aParam);
+	TInt SetRationalArrayParam(TUint aTag, TUint aIfd, CArrayFix<TRational>& aParam);
+	
+	
+	virtual HBufC8* GetJpegThumbnailData();
+	virtual void SetThumbnailData(HBufC8* aJpegData);
+	
+	TBool IsExifDataModified();
+	void ResetExifDataModified();
+	
+	// Helper Function
+	static TUint ReadUint32(const TBool aIntelByteAlign, const TUint8* aPtr);
+	// Helper Function	
+	static TUint16 ReadUint16(const TBool aIntelByteAlign, const TUint8* aPtr);
+	
+protected:
+	void SetUpIfdsL();
+	virtual void SetIfd1L()=0;
+	TInt CheckExifOffset(const TUint aOffset);
+	TBool FindIfdIndex(TInt aRealIfd, TInt& aIfdIndex) const;
+	CIfdGeneral* GetIfd(TInt aIndex);
+   	void RemoveThumbnailData();
+
+	CExifReaderWriter();
+	
+	void InitializeIfdsL(TBool aAlwaysCreateIfd1, TBool aCreateGpsIfd);
+	void InitializeIfdsL(TUint8* aData, TUint aApp1Size);	
+
+	void SetThumbnailDataBaseL(CIfdGeneral* ifd1, TBool aKeepIfd1);
+	HBufC8* CreateExifHeaderBaseL();
+	TInt GetThumbnailLengthOffsetBase(TUint& aThumbnailLengthOffset);
+	  
+private: // functions
+	
+	void ReadHeaderL();
+	TInt InternalIfd(const TUint aTag, const TInt aExternalIfd) const;
+	TInt CheckTagL(const TUint aTag, const TUint aIfd) const;
+	void FindInternalIfdDataL(const TUint aTag, const TUint aExternalIfdNumber, TInt& aInternalIfdNumber, CIfdGeneral*& aInternalIfd);
+	CIfdGeneral* FindIfd(const TUint aTag, const TUint aExternalIfd) const;
+	TInt ProcessGpsIfdAddParamResult(CIfdGeneral*& aGpsIfd, TInt aAddParamResult);
+	CIfdGeneral* CreateAndAppendSubIfdL(CIfdGeneral& aIfd, TUint aTag);
+
+	// thumbnail helper functions
+	virtual void WriteExifFileHeaderBaseL(const TUint aApp1Size, TUint8*& aPtr);
+	virtual void SetFirstIfdOffsetBase();
+
+	TInt DoSetParam8(TUint aTag, TUint aIfd, HBufC8* aParam);
+	TInt DoSetParam16(TUint aTag, TUint aIfd, HBufC16* aParam);
+	TInt DoSetIntegerParam(TUint aTag, TUint aIfd, TInt aParam);
+	TInt DoSetShortParam(TUint aTag, TUint aIfd, TUint16 aParam);
+	TInt DoSetRationalParam(TUint aTag, TUint aIfd, TInt aNumerator, TInt aDenominator);	
+	TInt DoSetIntegerArrayParam(TUint aTag, TUint aIfd, CArrayFix<TInt>& aParam);
+	TInt DoSetShortArrayParam(TUint aTag, TUint aIfd, CArrayFix<TUint16>& aParam);
+	TInt DoSetRationalArrayParam(TUint aTag, TUint aIfd, CArrayFix<TRational>& aParam);
+		
+protected:		
+	RPointerArray<CIfdGeneral> iIfds; //own IFDs
+	TBool iEncodeThumbnail;
+	TUint8* iData;
+	TBool iIntel;
+	const TUint8* iBase;
+	TUint16 iExifDataLength;	// used to check that offsets are within a valid range
+	
+private: // member variables
+	TUint iOffsetToZerothIfd;	
+	HBufC8* iJpegThumbnailData;
+	TBool iExifDataModified;
+	};
+
+#endif // EXIFREADERWRITER_H