camappengine/StillConverter/Inc/CaeStillConverter.h
author Pat Downey <patd@symbian.org>
Wed, 01 Sep 2010 12:23:23 +0100
branchRCL_3
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parent 0 9b3e960ffc8a
permissions -rw-r--r--
Revert incorrect RCL_3 drop: Revision: 201031 Kit: 201035
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/*
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* Copyright (c) 2002 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:  Still Image Converter base class for Camera Application Engine
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*
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*/
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#ifndef CAESTILLCONVERTER_H
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#define CAESTILLCONVERTER_H
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// INCLUDES
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#include <imageconversion.h>
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// CONSTANTS
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const TUid KUidSpecialFreeScalingDecoder = { 0x101FF555 }; // This decoder supports free scaling
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// CLASS DECLARATION
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/**
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* Still Converter class.
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* Base class for still image conversions by the Camera Application Engine.
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*/
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NONSHARABLE_CLASS( CCaeStillConverter ) : public CActive
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    {
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    public: 
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        /**
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        * Destructor.
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        */
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        virtual ~CCaeStillConverter();
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    protected:
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        /**
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        * Internal state.
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        */
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        enum 
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            {
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            EIdle,
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            EConvert
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            };
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    protected:  // Functions from base classes
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        /**
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        * From CActive, handles an active object’s request completion event.
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        * @return void
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        */
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        void RunL();
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        /**
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        * From CActive, called if CCaeStillConverter function RunL() leaves.
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        * @param aError Standard Symbian OS error code
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        * @return Error code KErrNone
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        */
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        TInt RunError( 
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            TInt aError );
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    protected:
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        /**
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        * C++ constructor.
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        */
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        CCaeStillConverter();
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        /**
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        * Symbian 2nd phase constructor that can leave.
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        * This is intended to be called from derived class ConstructL().
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        */
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        void ConstructL();
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    protected:
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        /**
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        * Returns the engine state.
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        * @return Boolean indicating if Still Converter is busy
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        */
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        TBool IsBusy() const;
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    protected: // To be implemented in a derived class.
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        /**
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        * Converts (encodes or decodes) the image.
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        * @return void
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        */
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        virtual void ConvertL() = 0;
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        /**
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        * Perfoms necessary cleanup and delivers the result to the client.
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        * @param aError Error code KErrNone to indicate success or a standard Symbian OS error code
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        * @return void
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        */
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        virtual void ConversionComplete( 
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            TInt aError ) = 0;
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        /** 
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        * Sets the specific image codec implementation to be used in decoding and encoding.
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        * @since 3.1
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        * @param aCodecUid The UID of the specific image codec to be used.
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        * @return void
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        */
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        virtual void SetImageCodecL( 
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        	TUid aCodecUid ) = 0;
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    protected:  // Data
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        // Class for image data.
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        class CImageItem: public CBase
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            {
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            public:
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                CImageItem() {};
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                virtual ~CImageItem() 
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                    {
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                    delete iBitmap;
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                    delete iImageBuffer;
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                    delete iFrameImageData;
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                    };
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            public:
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                // Bitmap.
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                CFbsBitmap* iBitmap;
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                // Bitmap target size.
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                TSize iBitmapSize;
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                // Bitmap target size for free scaling.
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                TSize iFullyScaledBitmapSize;
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               // Bitmap display mode.
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                TDisplayMode iBitmapDisplayMode;
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                // Image in some common image file format (like Jpeg)
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                HBufC8* iImageBuffer;
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                 // Info for encoder
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                CFrameImageData* iFrameImageData;
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                // UID of conversion target image type.
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                TUid iImageTypeUid;
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            };
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        // Specific image codec UID.
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        TUid iImageCodecUid;
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        // Pointer to array of CImageItem.
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        RPointerArray<CImageItem>* iImageQueue;
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        // Still Converter state.
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        TInt iState;
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    };
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#endif // CAESTILLCONVERTER_H
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// End of File