--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mmplugins/imagingplugins/codecs/JPEGCodec/Exif/ExifEditUtility.h	Wed Sep 01 12:38:50 2010 +0100
@@ -0,0 +1,142 @@
+// 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 EXIFEDITUTILITY_H
+#define EXIFEDITUTILITY_H
+
+#include <e32base.h>
+#include <icl/imagecodec.h>
+
+const TUint KBlockIdLength = 2;		// jpeg block id is two bytes long
+const TUint KBlockSizeLength = 2;	// jpeg block size is two bytes long
+const TUint KBlockIdAndSizeLength = KBlockIdLength + KBlockSizeLength;
+
+enum TConvertState
+	{
+	EEmpty,			// nothing has been done on the file
+	EReadComplete,	// use to say that the file has been read and can be written
+	
+	// write enums
+	EStartWrite,
+	EWriteReadHeader,
+	EWriteWriteHeader,
+	EReadThumbnail,
+	EWriteReadThumbnail,
+	EWriteConvertExif,
+	EWriteWriteExif,
+	EWriteTrailer,
+	EWriteReadMainImage,
+	ECancelled,
+	ECopying
+	};
+
+enum TCopyState
+	{
+	ERead,
+	EWrite,
+	EReadJpegBlockInfo
+	};
+
+//ExifTag class defines the Tags found in the Exif specification.
+class CExifData;
+class CScaledJpegGenerator;
+class MExifSource;
+class MExifDest;
+
+class CExifEditUtility : public CActive
+	{
+public:
+	static CExifEditUtility* NewL(MExifSource* aSource, MExifDest* aDest, TBool aIgnoreExifMetadataProcessing = EFalse);
+	~CExifEditUtility();
+
+	void ReadSourceL();
+	void WriteDestL(TBool aEncodeThumbnail, const TSize& aSize, TBool aPreserveImage, TBool aMaintainAspectRatio, TRequestStatus* aNotifier);
+	
+	MExifMetadata* ExifMetadata();
+
+protected:
+	CExifEditUtility(TBool aIgnoreExifMetadataProcessing);
+
+	void ProcessCommandL();
+	void DoCancel();
+
+private:
+	void ConstructL(MExifSource* aSource, MExifDest* aDest);
+
+	void InitReadL();
+
+	// asynchronous notification methods
+
+	TBool DoWriteConvertExifL();
+	TBool DoWriteReadThumbnailL();
+	TBool DoReadThumbnailL();
+	TBool DoWriteComplete();
+	TBool DoCreateMainImageL();
+	TConvertState DoCopyNextBlockL();
+
+	TBool DoCopyBlockL(TUint aStart, TInt aLength, TConvertState aNextStep, TBool aCombineTables = EFalse);
+	TBool DoWriteScaledImageL();
+
+	TBool DoWriteDestBufferL();
+
+	void RunL();
+	TInt RunError(TInt aError);
+	
+	void DoReadL();
+	void SetUpTablesL();	
+	void AppendTableDataL(RBuf8& aTables, const TDesC8& aData);
+	void HandleJpegBlockL(const TDesC8& aPrependedData);
+	void UpdateImageSizeTagsL();
+	
+private:
+	// configuration data
+	MExifSource* iSource;		/**< The source that will be read*/
+	MExifDest* iDest;			/**< The destination */
+	TSize iSize;				/**< size of the image in the destination */
+	TBool iPreserveImage; 		/**< ETrue if the image should not be changed*/
+	TBool iMaintainAspectRatio; 		/**< ETrue if the aspect ratio should be maintained*/
+	TBool iEncodeThumbnail;		/**< ETrue if the destination file should embed a thumbnail*/
+	TRequestStatus* iNotifier;	/**< the Active object to notify when the transform is performed*/
+
+	CExifTransform* iExifData;
+	CScaledJpegGenerator* iScaledJpegGenerator;
+
+	TUint iExifBlockSize;		// size of the exif block in the source	
+	TUint iHeaderBlockSize;		// size of the chunk of data that is before the exif data
+	TInt iTrailerBlockSize;		// size of the chunk of data that is after the exif data
+	TUint iTrailerOffset;		// offset to the trailing data in the source
+	
+	TBufPtr8 iIOBufferPtr;
+
+	TConvertState iState;
+
+	TCopyState iCurCopyState;
+	TConvertState iNextStep;
+	TInt iCopyLength;
+	TUint iCurrentWriteBufferIndex;
+	
+	RBuf8 iDHTTables;			// stores the DHT tables that must be combined into one for exif
+	RBuf8 iDQTTables;			// stores the DQT tables that must be combined into one for exif
+	
+	TInt iCurrentJpegBlockType;
+	TUint iCurrentJpegBlockSize;
+	TBool iDestIsExif;
+	TBuf8<KBlockIdAndSizeLength> iLookupSlackBuff; // for holding of block id slack when copying main image
+	RBuf8 iTempCopyBuffer;  // this buffer is used when we need to combine possibly incorrect block data
+	TBool iIgnoreExifMetadataProcessing; //don't parse any EXIF data if this flag is set, and writes transparently from src to dest.
+	TBool iConvertToJfif; //Source is to be converted to a JFIF by the transform (usually because source Exif block is corrupt).
+	};
+
+#endif //EXIFEDITUTILITY_H