1 // Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies).

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of "Eclipse Public License v1.0"

     5 // which accompanies this distribution, and is available

     6 // at the URL "http://www.eclipse.org/legal/epl-v10.html".

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 //

    15 

    16 #ifndef EXIFREADERWRITER_H

    17 #define EXIFREADERWRITER_H

    18 

    19 #include <iclexif.h> // For MExifMetadata declaration

    20 

    21 // Forward declarations

    22 class CIfdGeneral;

    23 class CIfd0;

    24 class CIfd1;

    25 class CExifIfd;

    26 class CInteropIfd;

    27 class CGpsIfd;

    28 

    29 class CExifReaderWriter : public CBase, public MExifMetadata

    30 	{

    31 public:

    32 	friend class CExifVerifier;

    33 		

    34 public:

    35 	~CExifReaderWriter();

    36 	

    37 	// Functions derived from MExifMetaData

    38 	TInt GetIntegerParam(TUint aTag, TUint aIfd, TInt& aParam) const;

    39 	TInt GetShortParam(TUint aTag, TUint aIfd, TUint16& aParam) const;

    40 	TInt GetRationalParam(TUint aTag, TUint aIfd, TInt& aNumer, TInt& aDenom) const;

    41 	TInt GetParam8(TUint aTag, TUint aIfd, HBufC8*& aParam) const;

    42 	TInt GetParam16(TUint aTag, TUint aIfd, HBufC16*& aParam) const;

    43 	TInt GetIntegerArrayParam(TUint aTag, TUint aIfd, CArrayFix<TInt>& aParam) const;

    44 	TInt GetShortArrayParam(TUint aTag, TUint aIfd, CArrayFix<TUint16>& aParam) const;

    45 	TInt GetRationalArrayParam(TUint aTag, TUint aIfd, CArrayFix<TRational>& aParam) const;

    46 	

    47 	TInt SetParam8(TUint aTag, TUint aIfd, HBufC8* aParam);

    48 	TInt SetParam16(TUint aTag, TUint aIfd, HBufC16* aParam);

    49 	TInt SetIntegerParam(TUint aTag, TUint aIfd, TInt aParam);

    50 	TInt SetShortParam(TUint aTag, TUint aIfd, TUint16 aParam);

    51 	TInt SetRationalParam(TUint aTag, TUint aIfd, TInt aNumerator, TInt aDenominator);	

    52 	TInt SetIntegerArrayParam(TUint aTag, TUint aIfd, CArrayFix<TInt>& aParam);

    53 	TInt SetShortArrayParam(TUint aTag, TUint aIfd, CArrayFix<TUint16>& aParam);

    54 	TInt SetRationalArrayParam(TUint aTag, TUint aIfd, CArrayFix<TRational>& aParam);

    55 	

    56 	

    57 	virtual HBufC8* GetJpegThumbnailData();

    58 	virtual void SetThumbnailData(HBufC8* aJpegData);

    59 	

    60 	TBool IsExifDataModified();

    61 	void ResetExifDataModified();

    62 	

    63 	// Helper Function

    64 	static TUint ReadUint32(const TBool aIntelByteAlign, const TUint8* aPtr);

    65 	// Helper Function	

    66 	static TUint16 ReadUint16(const TBool aIntelByteAlign, const TUint8* aPtr);

    67 	

    68 protected:

    69 	void SetUpIfdsL();

    70 	virtual void SetIfd1L()=0;

    71 	TInt CheckExifOffset(const TUint aOffset);

    72 	TBool FindIfdIndex(TInt aRealIfd, TInt& aIfdIndex) const;

    73 	CIfdGeneral* GetIfd(TInt aIndex);

    74    	void RemoveThumbnailData();

    75 

    76 	CExifReaderWriter();

    77 	

    78 	void InitializeIfdsL(TBool aAlwaysCreateIfd1, TBool aCreateGpsIfd);

    79 	void InitializeIfdsL(TUint8* aData, TUint aApp1Size);	

    80 

    81 	void SetThumbnailDataBaseL(CIfdGeneral* ifd1, TBool aKeepIfd1);

    82 	HBufC8* CreateExifHeaderBaseL();

    83 	TInt GetThumbnailLengthOffsetBase(TUint& aThumbnailLengthOffset);

    84 	  

    85 private: // functions

    86 	

    87 	void ReadHeaderL();

    88 	TInt InternalIfd(const TUint aTag, const TInt aExternalIfd) const;

    89 	TInt CheckTagL(const TUint aTag, const TUint aIfd) const;

    90 	void FindInternalIfdDataL(const TUint aTag, const TUint aExternalIfdNumber, TInt& aInternalIfdNumber, CIfdGeneral*& aInternalIfd);

    91 	CIfdGeneral* FindIfd(const TUint aTag, const TUint aExternalIfd) const;

    92 	TInt ProcessGpsIfdAddParamResult(CIfdGeneral*& aGpsIfd, TInt aAddParamResult);

    93 	CIfdGeneral* CreateAndAppendSubIfdL(CIfdGeneral& aIfd, TUint aTag);

    94 

    95 	// thumbnail helper functions

    96 	virtual void WriteExifFileHeaderBaseL(const TUint aApp1Size, TUint8*& aPtr);

    97 	virtual void SetFirstIfdOffsetBase();

    98 

    99 	TInt DoSetParam8(TUint aTag, TUint aIfd, HBufC8* aParam);

   100 	TInt DoSetParam16(TUint aTag, TUint aIfd, HBufC16* aParam);

   101 	TInt DoSetIntegerParam(TUint aTag, TUint aIfd, TInt aParam);

   102 	TInt DoSetShortParam(TUint aTag, TUint aIfd, TUint16 aParam);

   103 	TInt DoSetRationalParam(TUint aTag, TUint aIfd, TInt aNumerator, TInt aDenominator);	

   104 	TInt DoSetIntegerArrayParam(TUint aTag, TUint aIfd, CArrayFix<TInt>& aParam);

   105 	TInt DoSetShortArrayParam(TUint aTag, TUint aIfd, CArrayFix<TUint16>& aParam);

   106 	TInt DoSetRationalArrayParam(TUint aTag, TUint aIfd, CArrayFix<TRational>& aParam);

   107 		

   108 protected:		

   109 	RPointerArray<CIfdGeneral> iIfds; //own IFDs

   110 	TBool iEncodeThumbnail;

   111 	TUint8* iData;

   112 	TBool iIntel;

   113 	const TUint8* iBase;

   114 	TUint16 iExifDataLength;	// used to check that offsets are within a valid range

   115 	

   116 private: // member variables

   117 	TUint iOffsetToZerothIfd;	

   118 	HBufC8* iJpegThumbnailData;

   119 	TBool iExifDataModified;

   120 	};

   121 

   122 #endif // EXIFREADERWRITER_H