--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/imagingmodules/exiflib/inc/ExifIfd.h Thu Dec 17 09:22:31 2009 +0200
@@ -0,0 +1,449 @@
+/*
+* Copyright (c) 2003, 2004 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: Exif IFD wrapper class for handling the storage of the tags
+* and manipulating IFDs.
+*
+*/
+
+
+#ifndef EXIFIFD_H
+#define EXIFIFD_H
+
+// INCLUDES
+#include "ExifRead.h"
+#include <e32base.h>
+
+// FORWARD DECLARATIONS
+class CExifTagImpl;
+
+/**
+* Exif IFD wrapper base class
+* Provides the base for the other IFD structures.
+*
+* @lib ExifLib
+* @since 2.6
+*/
+NONSHARABLE_CLASS( CExifIfd ): public CBase
+ {
+ public: // Constructors and destructor
+
+ /**
+ * Two-phased constructor.
+ */
+ static CExifIfd* NewBaseL( TExifIfdType aIfdType );
+
+ /**
+ * Destructor.
+ */
+ virtual ~CExifIfd();
+
+ public: // New functions
+
+ /**
+ * Checks if the IFD is in valid format, and contains all mandatory tags.
+ * @since 2.6
+ * @return Boolean stating if the IFD is valid.
+ */
+ virtual TBool IsValid() const;
+
+ /**
+ * Checks if specified tag exists in the IFD.
+ * @since 2.6
+ * @param aTagId The queried tag ID
+ * @return Boolean stating if the tag exists.
+ */
+ TBool TagExists( TUint16 aTagId ) const;
+
+ /**
+ * Returns the size of the IFD structure in bytes.
+ * @since 2.6
+ * @return Size of the IFD in bytes.
+ */
+ TUint16 Size() const;
+
+ /**
+ * Sets the next IFD offset.
+ * @since 2.6
+ * @param aIfdOffset Next IFD offset
+ * @return void
+ */
+ void SetNextIfdOffset( TUint32 aIfdOffset );
+
+ /**
+ * Writes the tag data in the IFD structure to the location defined by
+ * the given pointer and the offset.
+ * @since 2.6
+ * @param aExifDataPtr Pointer to the Exif data
+ * @param aPos Offset for the beginning of the IFD data.
+ * @return void
+ */
+ void WriteTagsL( TUint16*& aExifDataPtr, TUint& aPos ) const;
+
+ /**
+ * Inserts/Replaces the given tag in the IFD structure.
+ * @since 2.6
+ * @param aExifTag Pointer to the tag instance updated.
+ * @param aCheckValidity When ETrue then tag validity is checked
+ * @return void
+ */
+ virtual void InsertTagL( CExifTagImpl* aExifTag, TBool aCheckValidity );
+
+ /**
+ * Removes the specified tag from the IFD structure
+ * @since 2.6
+ * @param aTagId The target tag ID.
+ * @return Error code.
+ */
+ TInt DeleteTag( TUint16 aTagId );
+
+ /**
+ * Gets the unmodifiable specified tag instance from the IFD structure.
+ * @since 2.6
+ * @param aTagId The queried tag ID.
+ * @return Constant pointer to the tag instance.
+ */
+ const CExifTagImpl* GetTagL( TUint16 aTagId ) const;
+
+ /**
+ * Gets the IDs and amount of the tags existing in the IFD structure.
+ * @since 2.6
+ * @param aNoTags Number of tag IDs returned.
+ * @return Pointer to the tag IDs.
+ */
+ TUint16* GetTagIdsL( TInt& aNoTags ) const;
+
+ /**
+ * Checks if the given tag ID is one of the IDs that can be stored in
+ * the IFD structure.
+ * @since 2.6
+ * @param aTagId The queried tag ID.
+ * @return Boolean stating if the specified tag ID is valid for the IFD.
+ */
+ TBool IsAcceptableTagId( TUint16 aTagId ) const;
+
+ protected: // New functions
+
+ /**
+ * C++ default constructor.
+ */
+ CExifIfd();
+
+ private:
+
+ /**
+ * By default Symbian 2nd phase constructor is private.
+ */
+ void ConstructL();
+
+ protected:
+
+ // The tag instances stored in the IFD.
+ CArrayPtrSeg< CExifTagImpl > iTagArray;
+
+ // Type of the IFD.
+ TExifIfdType iIfdType;
+
+ // Next IFD's offset.
+ TUint32 iNextIfdOffset;
+
+ // Size of the IFD data in bytes.
+ TUint16 iSize;
+
+ };
+
+
+/**
+* Exif IFD0 wrapper class
+*
+*
+* @lib ExifLib
+* @since 2.6
+*/
+NONSHARABLE_CLASS( CExifIfd0 ) : public CExifIfd
+ {
+ public: // Constructors and destructor
+
+ /**
+ * Two-phased constructor.
+ */
+ static CExifIfd0* NewL();
+
+ /**
+ * C++ default constructor.
+ */
+ CExifIfd0();
+
+ /**
+ * Destructor.
+ */
+ virtual ~CExifIfd0();
+
+ public: // Functions from base classes
+
+ /**
+ * From CExifIfd Checks if the IFD is in valid format, and contains all
+ * mandatory tags.
+ * @since 2.6
+ * @return Boolean stating if the IFD is valid.
+ */
+ TBool IsValid() const;
+
+ private:
+
+ /**
+ * By default Symbian 2nd phase constructor is private.
+ */
+ void ConstructL();
+
+ };
+
+
+/**
+* Exif Exif-IFD wrapper class
+*
+*
+* @lib ExifLib
+* @since 2.6
+*/
+NONSHARABLE_CLASS( CExifIfdExif ): public CExifIfd
+ {
+ public:
+
+ /**
+ * Two-phased constructor.
+ */
+ static CExifIfdExif* NewL();
+
+ /**
+ * C++ default constructor.
+ */
+ CExifIfdExif();
+
+ /**
+ * Destructor.
+ */
+ virtual ~CExifIfdExif();
+
+ public: // Functions from base classes
+
+ /**
+ * From CExifIfd Checks if the IFD is in valid format, and contains all
+ * mandatory tags.
+ * @since 2.6
+ * @return Boolean stating if the IFD is valid.
+ */
+ TBool IsValid() const;
+
+ private:
+
+ /**
+ * By default Symbian 2nd phase constructor is private.
+ */
+ void ConstructL();
+ };
+
+
+/**
+* Exif IFD1 wrapper class
+*
+*
+* @lib ExifLib
+* @since 2.6
+*/
+NONSHARABLE_CLASS( CExifIfd1 ): public CExifIfd
+ {
+ public: // Constructors and destructor
+
+ /**
+ * Two-phased constructor.
+ */
+ static CExifIfd1* NewL();
+
+ /**
+ * C++ default constructor.
+ */
+ CExifIfd1();
+
+ /**
+ * Destructor.
+ */
+ virtual ~CExifIfd1();
+
+ public: // New functions
+
+ /**
+ * Inserts/Updates the given Exif thumbnail image.
+ * @since 2.6
+ * @param aThumbnailData The Exif thumbnail image data that is updated
+ * @return Error code.
+ */
+ TInt SetThumbnailData( TDesC8* aThumbnailData );
+
+ /**
+ * Gets the Exif thumbnail image.
+ * @since 2.6
+ * @param aThumbnailData The Exif thumbnail image data returned.
+ * @return Error code.
+ */
+ TInt GetThumbnailData( TDesC8*& aThumbnailData ) const;
+
+ /**
+ * Removes the Exif thumbnail image.
+ * @since 2.6
+ * @return Error code.
+ */
+ TInt RemoveThumbnailData();
+
+ /**
+ * Returns the size of the Exif thumbnail image in bytes.
+ * @since 2.6
+ * @return Thumbnail image size
+ */
+ TUint16 ThumbnailSize() const;
+
+ /**
+ * Writes the Exif thumbnail image to the location defined by the given
+ * pointer and the offset.
+ * @since 2.6
+ * @param aExifDataPtr Pointer to the Exif data.
+ * @param aPos Offset for the beginning of the thumbnail image data.
+ * @return Thumbnail image size
+ */
+ void WriteThumbnailL( TUint8*& aExifDataPtr, TUint& aPos ) const;
+
+ public: // Functions from base classes
+
+ /**
+ * From CExifIfd Checks if the IFD is in valid format, and contains all
+ * mandatory tags.
+ * @since 2.6
+ * @return Boolean stating if the IFD is valid.
+ */
+ TBool IsValid() const;
+
+ /**
+ * From CExifIfd Inserts/Replaces the given tag in the IFD structure.
+ * @since 2.6
+ * @param aExifTag Pointer to the tag instance updated.
+ * @param aCheckValidity When ETrue then tag validity is checked
+ * @return void
+ */
+ void InsertTagL( CExifTagImpl* aExifTag, TBool aCheckValidity );
+
+ private:
+ /**
+ * By default Symbian 2nd phase constructor is private.
+ */
+ void ConstructL();
+
+ private:
+
+ // Pointer to the descriptor containing thumbnail image data.
+ TDesC8* iThumbnailBuffer;
+ };
+
+
+/**
+* Exif Interoperability IFD wrapper class
+*
+*
+* @lib ExifLib
+* @since 2.6
+*/
+NONSHARABLE_CLASS( CExifIfdIntOp ): public CExifIfd
+ {
+ public:
+
+ /**
+ * Two-phased constructor.
+ */
+ static CExifIfdIntOp* NewL();
+
+ /**
+ * C++ default constructor.
+ */
+ CExifIfdIntOp();
+
+ /**
+ * Destructor.
+ */
+ virtual ~CExifIfdIntOp();
+
+ public: // Functions from base classes
+
+ /**
+ * From CExifIfd Checks if the IFD is in valid format, and contains all
+ * mandatory tags.
+ * @since 2.6
+ * @return Boolean stating if the IFD is valid.
+ */
+ TBool IsValid() const;
+
+ private:
+
+ /**
+ * By default Symbian 2nd phase constructor is private.
+ */
+ void ConstructL();
+ };
+
+
+/**
+* Exif Gps IFD wrapper class
+*
+*
+* @lib ExifLib
+* @since 2.6
+*/
+
+NONSHARABLE_CLASS( CExifIfdGps ): public CExifIfd
+ {
+ public:
+
+ /**
+ * Two-phased constructor.
+ */
+ static CExifIfdGps* NewL();
+
+ /**
+ * C++ default constructor.
+ */
+ CExifIfdGps();
+
+ /**
+ * Destructor.
+ */
+ virtual ~CExifIfdGps();
+
+ public: // Functions from base classes
+
+ /**
+ * From CExifIfd Checks if the IFD is in valid format, and contains all
+ * mandatory tags.
+ * @since 2.6
+ * @return Boolean stating if the IFD is valid.
+ */
+ TBool IsValid() const;
+
+ private:
+
+ /**
+ * By default Symbian 2nd phase constructor is private.
+ */
+ void ConstructL();
+ };
+
+#endif // EXIFIFD_H
+
+// End of File