/*

* Copyright (c) 2008 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:  Video Source subsystem.

*

*/

#ifndef C_MULTIFRAMEPROVIDER_H

#define C_MULTIFRAMEPROVIDER_H

// INCLUDE FILES

#include <f32file.h>

#include <gdi.h>

#include "cactivewait.h"

#include "cvtimagescaler.h"

#include "mmultiframeprovider.h"

// FORWARD DECLARATIONS

class CVtImageBitmap;

class CImageDecoder;

class CMultiframeloopAO;

class TScalingMediator;

class CMultiframeProvider;

class CMultiframeDataAO;

const TInt KFirstFrameIndx = 0;

// CLASS DECLARATION

// ============================ TScalingMediator ===============================

/**

*  Internal implementation of still scaling mediator 

*  @lib videosource.lib

*/

NONSHARABLE_CLASS( TScalingMediator) : public MVtImageScalerObserver

	{

	public :

			TScalingMediator();

	public :

			/**

      * @see MVtImageScalerObserver::ScalingFinished( TInt aError )

      */

			void ScalingFinished( TInt aError );

			/**

			* Sets waiter observer

			*/

			void SetWaiter( CVSActiveWait< CMultiframeProvider >* aWait );

	private :

			CVSActiveWait< CMultiframeProvider >* iWait;		

	};

// ============================ CMultiframeProvider ===============================

/**

*  Internal implementation of multiframe provider

*  @lib videosource.lib

*/

NONSHARABLE_CLASS( CMultiframeProvider ) : public CBase

    {

    public :        // Constructors and destructor

        /**

        * Static factory function create instance of this class.

        * @param "aObserver" Pointer to data provider observer.

        * @param  aDisplayMode current display mode

        * @exception Can leave with one of the system wide error codes.

        * @return Pointer to new instance.

        */

        static CMultiframeProvider* NewL( MMultiframeprovider* aObserver, TDisplayMode aDisplayMode );

        /**

        * Destructor.

        */

        ~CMultiframeProvider();

    public :        // Functions from base classes

    		/**

        * Initializes this instance from image or multiframe file.

        * @param aFileName Name of the file from which this intance will be

        * initialized.

        * @exception Can leave with one of the system wide error codes.

        */

        void InitializeL( const TFileName* aFileName );

        /**

        * Cancel initialization of multiframe provider.

        * @return ETrue if don't need to wait a error message.

        */

        TBool CancelInitializing();

    		/**

        * Initializes this instance for blank image bitmap.

        */

    		void IniatializeBlankL();

    		/**

        * Initializes this instance for Generalsettings image bitmap.

        */

    		void IniatializeGSL( const TGeneralSettingsImageType aType );	

    		/**

        * Sets ViewFinder size

        * @param aSize size of target bitmap (view finder)

        */

    		void SetVFScalingTargetSize( TSize aSize );

				/**

        * Decodes and scales initialized image or multiframe file

        * @param aFrameindex	index of frame to be decoded and scaled

        */

				void ConvertAndScaleL( TInt aFrameIndex );

				/**

        * Scales and copies decoded frame for view finder display

        * @param aSize size of target bitmap ( view fiender )

        */

				void ScaleCopy( TSize& aSize, TBool aVFUpdate = EFalse  );

				/**

        * Signals looping AO to proceed to next frame

        */

				void NextFrame();

				/**

        * Clears ViewFinder size

        */

				void ClearVFScalingTargetSize();

				/**

        * Increases number of data consumers by one

        */

				void IncreaseDataConsumer();

				/**

        * Decreases number of data consumers by one

        * and if number is less than one it cancels data looping

        * mechanism

        */

				void DecreaseDataConsumer();

				/**

        * Adds used bitmap to free queue

        */

				/**

        * Indicates that second VF buffer needs to be used

        */

				void UseSecondVfBuffer();

				/**

        * Indicates that VF has been stopped

        */

                TBool IsVFStopped();

        /**

         * Set ViewFinder of Multiframe provider to stop

         */

                void SetVFStop();

        /**

        * Wait for converting function exit 

        */

                void WaitForConverting();

        /**

        * Release converting flag 

        */

                void ReleaseForConverting();

		private :    // Constructors and destructor

        /**

        * Constructor.

        * @param "aObserver" Pointer to data provider observer.

        * @param aDisplayMode current display mode

        */

        CMultiframeProvider( MMultiframeprovider* aObserver, TDisplayMode aDisplayMode  );

        /**

        * 2nd phase constructor.

        * @exception Can leave with one of the system wide error codes.

        */

        void ConstructL();

        /**

        * Image conversion finished callback. This method is called when image

        * conversion is done.

        * @param "aError" Error code. KErrNone if no error happened, one of the

        * system wide error codes.

        * otherwise.

        */

        void ConversionFinished( TInt aError );

        /**

        * Image scaling finished callback. This method is called when image

        * scaling is done.

        * @param "aError" Error code. KErrNone if no error happened, one of

        * the system wide error codes.

        */

        void BMSScalingFinished( TInt aError );

        /**

        * Scales VF to new size.

        * @param "aSize" New VF size.

        * the system wide error codes.

        */

        void ScaleVF( const TSize& aSize );

        /**

        * When view finder frame must be rescaled (wanted view finder size is

        * neither QCIF nor QQQCIF) this callback will be called when the

        * rescaling has finished.

        * @param "aError" Error code. KErrNone if no error happened, one of

        * the system wide error codes.

        */

        void VFRescalingFinished( TInt aError );

        /**

        * When view finder frames are rescaled this callback method will be

        * called.

        * @param "aError" Error code. KErrNone if no error happened, one of

        * the system wide error codes.

        */

        void VFScalingReady();

        /**

        * Creates blank bitmap with given size, color mode and color.

        * @param "aBitmap" Bitmap pointer reference into which pointer to new

        * isntance will be copied.

        * @param "aSize" Size of the blank bitmap to be created.

        * @param "aMode" Color mode for created bitmap.

        * @param "aColor" Color of created bitmap.

        * @exception Can leave with one of the system wide error codes.

        */

        void CreateBlankBitmapL( CFbsBitmap*& aBitmap, const TSize& aSize, const TDisplayMode& aMode, const TRgb& aColor );

    public : // Data

    		TBool iAnimation;

    		TBool iConvertAndScale;    

		protected:  // Data

				RCriticalSection iFreezeCS;

		private : //Data

        // Source image for CVtImageScaler

        CVtImageBitmap* iConverted;

        // Target image for CVtImageScaler

        CVtImageBitmap* iScaled;

				CVtImageBitmap* iBuffer1;

				CVtImageBitmap* iBuffer2;

				// Pointer to remote image

				CVtImageBitmap* iYUVBitMap;

        // Pointer to QCIF sized view finder image

        CVtImageBitmap* iVFbitmap;

        CVtImageBitmap* iFirstVfBuf;

        CVtImageBitmap* iSecondVfBuf;

        // Boolean values of VF buffer validation

        TBool iSecondVFBuffer;

        TBool iFirstVFBuffer;

        // Pointer to bitmap loaded from GS

        CVtImageBitmap* iGSBitmap;

        // Pointer to selected view finder image

        CVtImageBitmap* iVFCurrent;

        // Viewer AO instance

        CMultiframeloopAO* iLoopAo;// owned

        // Initalisation scaling mediator

        TScalingMediator iInitMediator;

        // ViewFinder scaling scaling mediator

        TScalingMediator iScalingMediator;

        // Waiter instance for initialisation

        CVSActiveWait< CMultiframeProvider >* iActiveWaitInit;// owned

        // Waiter instance for scaling

        CVSActiveWait< CMultiframeProvider >* iActiveWaitScale;// owned

        // Waiter instance for scaling

        CVSActiveWait< CMultiframeProvider >* iActiveWaitInitScale; // owned

        // VT image scaler instance for initialisation

        CVtImageScaler*  iVtImageScalerInit; // owned

        // VT image scaler instance for scaling

        CVtImageScaler*  iVtImageScalerScale; // owned

        // Image decoder instance

        CImageDecoder* iImageDecoder; // owned

        // Wanted view finder size

        TSize iWantedVFSize;

        // FireServer session instance

        RFs iFs;

        // Current display mode

        TDisplayMode iDisplayMode;

        // Rescaling recuirement flag

        TBool iVFRescalingRequired;

        // Multiframe observer instance

        MMultiframeprovider* iObserver;

        // VF bitmap size

        TSize iTargetSize;

        // Is blank image share

        TBool iBlank;

        // Is GS image share

        TBool iGSImage;

        // Is second bitmap in use

        TBool iOldBM;

        // Pointer to old bitmap

        CVtImageBitmap* iOldBitmap;

        // Frame count

      	TInt iCount;

      	// Is initialization ongoing flag

      	TBool iInitialization;

      	// Frame delay

      	TTimeIntervalMicroSeconds iDelay;

      	// Start time for image conversion

      	TTime iStartTime;

      	// Data timer expiration / Frame update time

      	TTimeIntervalMicroSeconds iFrameUpdateTime;

      	// Pointer to data timer AO

      	CMultiframeDataAO* iDataTimer;

      	// Number of data consumers

      	TInt iNumOfConsumers;

      	// Queue for bitmaps that are free for use

        RPointerArray<CVtImageBitmap> iFreeQueue;

        // Pointer to bitmap mask

        CFbsBitmap* iMask;

        // Pointer to temporary bitmap

        CVtImageBitmap* iTempBM;

        TSize iVFSize;

        // Boolean value of VF buffer update

        TBool iVFUpdate; 

        // file handle to default VT image

        RFile iDefaultImageFile;

        // Boolean value of VF buffer stopping

        TBool iIsVfStopped;

        // Boolean value of VF buffer stopping

        TBool iWaitForConverting;

      };

#endif      // C_MULTIFRAMEPROVIDER_H

// End of File