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mmplugins/imagingplugins/codecs/JPEGCodec/Exif/ifdgeneral.h
branchRCL_3
changeset 50 948c7f65f6d4
parent 0 40261b775718 
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mmplugins/imagingplugins/codecs/JPEGCodec/Exif/ifdgeneral.h	Wed Sep 01 12:38:50 2010 +0100
@@ -0,0 +1,201 @@
+// 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 IFDGENERAL_H
+#define IFDGENERAL_H
+
+#include <e32base.h>
+#include "ExifTagDescriptions.h"
+
+class CIfdGeneralEntry;
+class CIfdGeneral : public CBase
+	{
+public:
+	friend class CExifVerifier;
+
+public:
+	~CIfdGeneral();
+
+	TInt GetIntegerParam(const TUint aTag, TInt& aParam) const;
+	TInt GetShortParam(const TUint aTag, TUint16& aParam) const;
+	TInt GetRationalParam(const TUint aTag, TInt& aNumer, TInt& aDenom) const;
+	TInt GetParam8(const TUint aTag, HBufC8*& aParam) const;
+	TInt GetParam16(const TUint aTag, HBufC16*& aParam) const;
+
+	void GetIntegerArrayParamL(const TUint aTag, CArrayFix<TInt>& aParam) const;
+	void GetShortArrayParamL(const TUint aTag, CArrayFix<TUint16>& aParam) const;
+	void GetRationalArrayParamL(const TUint aTag, CArrayFix<TRational>& aParam) const;
+
+	// Returns the number of bytes stored by an Ifd.
+	TInt Size() const;
+	
+	// Can only be called by the 0th Ifd (otherwise returns KErrNotSupported).
+	TInt GetOffsetToFirstIfd(TUint& aOffset) const;
+	
+	TInt Ifd() const; // returns the identifying Ifd.
+
+	virtual TUint8* CreateIfdBlockL(TUint aOffset);
+	
+	TUint EntryCount() const;
+	
+	// Set the data of existing tag entries.
+	TInt SetParam8(const TUint aTag, HBufC8* aParam);
+	TInt SetParam16(const TUint aTag, HBufC16* aParam);
+	TInt SetIntegerParam(const TUint aTag, const TInt aParam);
+	TInt SetShortParam(const TUint aTag, const TUint16 aParam);
+	TInt SetRationalParam(const TUint aTag, const TInt aNumerator, const TInt aDenominator);	
+	void SetIntegerArrayParamL(const TUint aTag, const CArrayFix<TInt>& aParam);		
+	void SetRationalArrayParamL(const TUint aTag, const CArrayFix<TRational>& aParam);
+	void SetShortArrayParamL(const TUint aTag, const CArrayFix<TUint16>& aParam);
+	
+	// Add a new entry.
+	void AddParam8L(const TUint aTag, const TUint aFormat, const TUint aComponentCount, HBufC8* aParam);
+	void AddParam16L(const TUint aTag, const TUint aFormat, const TUint aComponentCount, HBufC16* aParam);
+	void AddIntegerParamL(const TUint aTag, const TUint aFormat, const TUint aComponentCount, TInt aParam);
+	void AddShortParamL(const TUint aTag, const TUint aFormat, const TUint aComponentCount, TUint16 aParam);
+	void AddRationalParamL(const TUint aTag, const TUint aFormat, const TUint aComponentCount, const TInt aNumerator, const TInt aDenominator);
+	void AddIntegerArrayParamL(const TUint aTag, const TUint aFormat, const CArrayFix<TInt>& aParam);	
+	void AddRationalArrayParamL(const TUint aTag, const TUint aFormat, const CArrayFix<TRational>& aParam);
+	void AddShortArrayParamL(const TUint aTag, const TUint aFormat, const CArrayFix<TUint16>& aParam);
+	
+	// Does the given tag exist in this Ifd?
+	TBool EntryExists(const TUint aTag) const;
+	
+	TInt GetFormat(TUint aTag, TUint& aFormat);
+	TInt GetComponentCount(TUint aTag, TUint& aComponentCount);
+
+	TBool FindTag(const TUint aTag);
+	
+	// Remove an entry
+	void RemoveEntryL(const TUint aTag);
+	
+	virtual void CheckMandatoryEntriesL();
+protected:
+	CIfdGeneral(const TInt aIfdNumber, const TUint aOffsetToIfd, const TUint8* aBase, const TBool aIntel, const TUint aExifDataLength);
+	void ConstructL();
+	
+	virtual TInt GetTagIndex(const TUint aTag);
+	virtual TInt GetNumberOfValidTags()=0;
+	virtual const TUint* GetTagInformation(TInt aIndex)=0;
+	
+	virtual TBool AllowNullTags();	
+	//check if the 	ifd entry count is valid with respect to minimum and maximum value.
+	virtual TBool IsValidIfdEntryCount(TUint16 aIfdEntryCount) const;
+private: // Functions
+	void SetupDirectoryEntriesL(); 
+	void AddAllIfdEntriesL();
+	CIfdGeneralEntry* CreateIfdEntryLC(const TUint& aTag, const TUint& aFormat, const TUint& aComponentCount, const TUint8* aValuePtr, TUint aValueOffset, TUint aTotalSize, TBool& aUnknownTag);
+	TInt LocateEntry(const TUint16 aTag) const;
+	
+	void WriteIfdDirEntriesL(TUint8* aBlock, TUint aOffset);
+	void WriteIfdData(TUint8* aBlock);
+
+	
+protected: // Member variables.
+	const TUint iIfdNumber;
+	const TBool iIntel;
+	const TUint iOffsetToIfd;
+	const TUint8* iBase; // base pointer to ifd entry memory. Not owned
+	const TUint iExifDataLength;// size of EXIF data (i.e. from iBase to the end of
+								// the EXIF data) used for offset checking.
+								
+	TUint16	iIfdEntryCount; // The number of tags a decoded IFD header thinks it has.
+	RPointerArray<CIfdGeneralEntry> iIfdEntries; // iIfdEntries.Count() is the number of valid tags.
+	};
+	
+	
+class CIfd0 : public CIfdGeneral
+	{
+public:		
+	static CIfd0* NewLC(const TUint aOffsetToIfd=0, const TUint8* aBase=NULL, const TBool aIntel=EFalse, const TUint aExifDataLength=0);
+	virtual TInt GetNumberOfValidTags();
+	virtual const TUint* GetTagInformation(TInt aIndex);
+	~CIfd0();
+protected:
+	void ConstructL();
+	virtual TBool IsValidIfdEntryCount(TUint16 aIfdEntryCount) const;
+	//Gets information about manufacturer name, model name and UI platform - depending on the tagvalue
+	HBufC8* GetDeviceInfo(TUint aTagValue);
+private:
+	CIfd0(const TUint aOffsetToIfd, const TUint8* aBase, const TBool aIntel, const TUint aExifDataLength);
+protected:
+	//buffer for storing manufaturer, model and UI platform
+	HBufC8* iManufacturerName;
+	HBufC8* iModelName;
+	HBufC8* iUIPlatform;
+	TUint iTag010F[6];
+	TUint iTag0110[6];
+	TUint iTag0131[6];
+	};
+	
+class CExifIfd : public CIfdGeneral
+	{
+public:		
+	static CExifIfd* NewLC(const TUint aOffsetToIfd=0, const TUint8* aBase=NULL, const TBool aIntel=EFalse, const TUint aExifDataLength=0);
+	static CExifIfd* NewL(const TUint aOffsetToIfd, const TUint8* aBase, const TBool aIntel, const TUint aExifDataLength);
+	virtual TInt GetNumberOfValidTags();
+	virtual const TUint* GetTagInformation(TInt aIndex);
+    virtual void CheckMandatoryEntriesL();
+    TBool CheckImageSizeTags();
+    void UpdateImageSizeTagsL(const TSize& aSize);
+private:
+	CExifIfd(const TUint aOffsetToIfd, const TUint8* aBase, const TBool aIntel, const TUint aExifDataLength);	
+	};
+	
+class CInteropIfd : public CIfdGeneral
+	{
+public:		
+	static CInteropIfd* NewLC(const TUint aOffsetToIfd=0, const TUint8* aBase=NULL, const TBool aIntel=EFalse, const TUint aExifDataLength=0);
+	static CInteropIfd* NewL(const TUint aOffsetToIfd, const TUint8* aBase, const TBool aIntel, const TUint aExifDataLength);
+	virtual TInt GetNumberOfValidTags();
+	virtual const TUint* GetTagInformation(TInt aIndex);  
+    
+protected:
+	virtual TBool IsValidIfdEntryCount(TUint16 aIfdEntryCount) const;
+
+private:
+	CInteropIfd(const TUint aOffsetToIfd, const TUint8* aBase, const TBool aIntel, const TUint aExifDataLength);	
+	};
+	
+class CIfd1 : public CIfdGeneral
+	{
+public:		
+	static CIfd1* NewLC(const TUint aOffsetToIfd=0, const TUint8* aBase=NULL, const TBool aIntel=EFalse, const TUint aExifDataLength=0);
+	virtual TInt GetNumberOfValidTags();
+	virtual const TUint* GetTagInformation(TInt aIndex);    
+    
+private:
+	CIfd1(const TUint aOffsetToIfd, const TUint8* aBase, const TBool aIntel, const TUint aExifDataLength);	
+	};
+
+class CGpsIfd : public CIfdGeneral
+	{
+public:		
+	static CGpsIfd* NewLC(const TUint aOffsetToIfd=0, const TUint8* aBase=NULL, const TBool aIntel=EFalse, const TUint aExifDataLength=0);
+	static CGpsIfd* NewL(const TUint aOffsetToIfd, const TUint8* aBase, const TBool aIntel, const TUint aExifDataLength);
+	virtual TInt GetNumberOfValidTags();
+	virtual const TUint* GetTagInformation(TInt aIndex);
+   
+protected:
+	virtual TBool IsValidIfdEntryCount(TUint16 aIfdEntryCount) const;
+
+	TBool AllowNullTags();
+    
+private:
+	CGpsIfd(const TUint aOffsetToIfd, const TUint8* aBase, const TBool aIntel, const TUint aExifDataLength);	
+	};
+
+
+#endif // IFDGENERAL_H
FCL/sf/os/mm