/*

* Copyright (c) 2002 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:  Still Image Encoder for Camera Application Engine

*

*/

#ifndef CAESTILLENCODER_H

#define CAESTILLENCODER_H

// INCLUDES

#include <e32base.h>

#include <s32file.h>

#include <imageconversion.h>

#include "CaeStillConverter.h"

// CONSTANTS

const TInt KJpegQualityMin = 0;

const TInt KJpegQualityMax = 100;

const TJpegImageData::TColorSampling KCaeJpegColorSampling = TJpegImageData::EColor420;

// CLASS DECLARATION

/**

*  Still encoder observer class.

*  User of CCaeStillEncoder class must derive from this interface.

*

* @lib CAESTILLCONVERTER.LIB

* @since 2.1

*/

class MCaeStillEncoderObserver

    {

    public:

        /**

        * Called back by CCaeStillEncoder when it completes conversion (encoding) to HBufC8 image data (as JPEG).

        * single media item during media items enumeration.

        * @since 2.1

        * @param aBitmap Source Symbian OS bitmap image

        * @param aImageData Converted image (as JPEG)

        * @param aError Error code KErrNone to indicate success or a standard Symbian OS error code

        * @param aImageSize Encoded image size

        * @return void

        */

        virtual void McaeseoHBufC8ImageReady(

            CFbsBitmap* aBitmap,

            HBufC8* aImageData, 

            TInt aError,

            TInt aImageSize ) = 0;

    };

// CLASS DECLARATION

/**

* Still Encoder class. Derived from CaeStillConverter. 

* Implements still image encoding for Camera Application Engine 

* using Symbian Image Conversion Library (ICL).

*

* @lib CAESTILLCONVERTER.LIB

* @since 2.1

*/

NONSHARABLE_CLASS( CCaeStillEncoder ) : public CCaeStillConverter

    {

    public: // Conversion target image type.

        enum TTargetFormat

            {

            ETargetFormatJPEG

            };

    public: // Constructor and destructor    

        /**

        * Two-phased constructor.

        */

        IMPORT_C static CCaeStillEncoder* NewL();

        /**

        * Destructor.

        */

        IMPORT_C virtual ~CCaeStillEncoder();

    public: // From CCaeStillConverter:

        void SetImageCodecL( 

        	TUid aCodecUid );

    public: // New functions

        /**

        * Sets Still Encoder observer.

        * @since 2.1

        * @param aObserver Still Encoder observer

        * @return void

        */

        IMPORT_C void SetObserver( 

            MCaeStillEncoderObserver* aObserver );

        /**

        * Sets compression quality.

        * @since 2.1

        * @param aQuality Compression quality

        * @return void

        */

        IMPORT_C void SetCompressionQuality( 

            TInt aQuality );

        /**

        * Gets compression quality.

        * @since 2.1

        * @return Compression quality

        */

        IMPORT_C TInt CompressionQuality() const;

        /** 

        * Creates the CImageItem object, places it in the internal queue and 

        * starts the memory image conversion where the memory bitmap is 

        * converted to another format (e.g. JPEG). 

        * @since 2.1

        * @param aBitmap Bitmap to convert

        * @param aTargetFormat Target/destination image format (JPEG by default)

        * @return void

        */

        IMPORT_C void ConvertCFbsBitmapToHBufC8L( 

            CFbsBitmap* aBitmap,

            TTargetFormat aTargetFormat = ETargetFormatJPEG );

        /**

        * Destroys all allocations for encoding, as the images from the queue.

        * @return void

        */

        IMPORT_C void Cleanup();

    private: // Constructors

        /**

        * C++ constructor.

        */

        CCaeStillEncoder();

        /**

        * Symbian 2nd phase constructor that can leave.

        */

        void ConstructL();

    private: // From CCaeStillConverter:

        /**

        * From CActive, implements cancellation of an outstanding request.

        * @return void

        */

        void DoCancel();

    private: // From CCaeStillConverter:

        void ConvertL();

        void ConversionComplete( 

            TInt aError );

    private: // Data

        // Still Encoder observer.

        MCaeStillEncoderObserver* iObserver;

        // Pointer to ICL encoder object.

        CImageEncoder* iEncoder;

        // Pointer to encoded image.

        HBufC8* iEncodedImage;

        // Quality factor for JPEG images.

        TInt iJpegQuality;

    };

#endif // CAESTILLENCODER_H

// End of File