--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/camerauis/cameraapp/generic/inc/cameracontroller/camimagedecoder.h	Wed Sep 01 12:30:54 2010 +0100
@@ -0,0 +1,174 @@
+/*
+* Copyright (c) 2007-2010 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:  Image Decoder class and observer interface.
+*
+*/
+
+
+#ifndef CAM_IMAGEDECODER_H
+#define CAM_IMAGEDECODER_H
+
+// ===========================================================================
+// Included headers
+#include <e32std.h>
+#include <f32file.h>
+
+// ===========================================================================
+// Forward declarations
+class CFbsBitmap;
+class CImageDecoder;
+class MCameraBuffer;
+class CCamBufferShare;
+class CSvgEngineInterfaceImpl;
+
+// ===========================================================================
+// Classes
+
+/**
+* Interface for Image Decoder Observers
+*/
+class MCamImageDecoderObserver
+  {
+  public:
+  
+    /**
+    * Notify observer that the image decoding has finished.
+    * @param aStatus Status code describing the success of the operation.
+    *        KErrNone if all went as planned.
+    * @param aBitmap Decoded bitmap. NULL if errors in decoding.
+    */
+    virtual void ImageDecodedL( TInt aStatus, const CFbsBitmap* aBitmap, const CFbsBitmap* aMask ) = 0;
+
+  };
+  
+
+/**
+* Image Decoder class
+*/
+class CCamImageDecoder : public CActive
+  {
+  // =======================================================
+  public:
+
+    /**
+    * 2-phase constructor.
+    */
+    static CCamImageDecoder* NewL( MCamImageDecoderObserver& aObserver );
+    
+    /**
+    * Destructor.
+    */
+    virtual ~CCamImageDecoder();
+
+  // -------------------------------------------------------
+  // From CActive
+  protected: 
+
+    /**
+    * Called when Cancel is requested and this AO is active.
+    * @see CActive
+    */
+    virtual void DoCancel();
+
+    /**
+    * We get notified of the decoding success by a call to RunL
+    * when decoding finishes.
+    * @see CActive
+    */
+    virtual void RunL();
+    
+    /**
+    * If a leave occurs in RunL, RunError gets called by the 
+    * Active Scheduler.
+    * @param aError Leave code from RunL.
+    * @see CActive
+    */
+    virtual TInt RunError( TInt aError );
+
+  // -------------------------------------------------------
+  public:
+
+    void StartConversionL( CCamBufferShare* aBuffer );
+    
+    void StartIconConversionL( TDesC* aFilePath, TSize& aSize );
+
+  private:
+
+    /**
+    * Store the buffer and release any previous buffer.
+    * Can be called with NULL to release current buffer.
+    */  
+    void SetImageData( CCamBufferShare* aBuffer );
+
+    /**
+    * Get the image data in descriptor form.
+    * No new memory is allocated to the returned buffer,
+    * so ownership not transferred.
+    * @return Pointer to image data that is to be used for image conversion.
+    *         If EXIF thumbnail is available, it is used, otherwise the
+    *         full image data is used instead. If the image data cannot be
+    *         read from the buffer, or the buffer has not been set,
+    *         leave will occur.
+    * @leave  KErrNotFound, if image buffer is not set or contains no image data. 
+    *         Any other system error, e.g. KErrNoMemory.
+    */
+    TDesC8* GetImageDataL();
+
+    /**
+    * Read the EXIF thumbnail and return it in descriptor.
+    * If any errors, return NULL.
+    * @param  aExifData The full image data containing EXIF part.
+    * @return The EXIF thumbnail in a heap descriptor. NULL if
+    *         error occurs in reading (OOM, no data given, 
+    *         no EXIF thumbnail found..).
+    */
+    HBufC8* ReadExifThumbNail( const TDesC8& aExifData );
+
+  private:
+
+    /**
+    * 2nd phase constructor.
+    */
+    void ConstructL();
+
+    /**
+    * 1st phase constructor.
+    * Cannot leave.
+    */
+    CCamImageDecoder( MCamImageDecoderObserver& aObserver );
+
+  // =======================================================
+  // Data
+  private:
+
+    RFs                       iFs;
+    MCamImageDecoderObserver& iObserver;
+    CSvgEngineInterfaceImpl* iSvgEngine;
+
+    CCamBufferShare* iSharedImageData;
+    HBufC8*          iThumbnailData;
+
+    CFbsBitmap*    iDecodedBitmap;
+    CFbsBitmap*    iDecodedMask;
+    CImageDecoder* iDecoder;    
+    
+    TInt           iRetryCounter;
+
+  // =======================================================
+  };
+
+// ===========================================================================
+#endif
+
+// end of file