/*

* Copyright (c) 2008-2009 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:   Utility for creating bitmaps from video files

*

*/

/**

 * @internal reviewed 31/07/2007 by Simon Brooks

 */

#include "glxtnimageutility.h"

#include <MIHLScaler.h>    // MIHLScaler

#include <fbs.h>

#include <glxtracer.h>

#include <glxpanic.h>

#include <glxthumbnail.h>

#include <imageconversion.h>

#include "glxtnimagedecoderfactory.h"

// -----------------------------------------------------------------------------

// Constructor

// -----------------------------------------------------------------------------

//

CGlxtnImageUtility::CGlxtnImageUtility(RFs& aFs) : iFs(aFs)

    {

    TRACER("CGlxtnImageUtility::CGlxtnImageUtility()");

    }

// -----------------------------------------------------------------------------

// Destructor

// -----------------------------------------------------------------------------

//

CGlxtnImageUtility::~CGlxtnImageUtility()

    {

    TRACER("CGlxtnImageUtility::~CGlxtnImageUtility()");

    delete iDecoder;

    delete iScaler;

    delete iBitGc;

    }

// -----------------------------------------------------------------------------

// Cancel

// -----------------------------------------------------------------------------

//

void CGlxtnImageUtility::Cancel()

    {

    TRACER("void CGlxtnImageUtility::Cancel()");

	if ( iDecoder ) 

		{

		iDecoder->Cancel();

		}

    if ( iScaler && iScaler->IsBusy())

        {

        iScaler->CancelProcess();

        }

    }

// -----------------------------------------------------------------------------

// AdjustSize

// -----------------------------------------------------------------------------

//

void CGlxtnImageUtility::AdjustSize(TSize& aTargetSize, const TSize& aSourceSize)

    {

    TRACER("void CGlxtnImageUtility::AdjustSize()");

    if ( aTargetSize.iHeight * aSourceSize.iWidth

            < aTargetSize.iWidth * aSourceSize.iHeight )

        {

        // Source has taller aspect than target so reduce target width

        aTargetSize.iWidth =  ( ( aTargetSize.iHeight * aSourceSize.iWidth )

                                / (  aSourceSize.iHeight ) );

        }

    else

        {

        // Source has wider aspect than target so reduce target height

        aTargetSize.iHeight = (aTargetSize.iWidth * aSourceSize.iHeight)

                                / aSourceSize.iWidth;

        }

    }

// -----------------------------------------------------------------------------

// DecodeImageL

// -----------------------------------------------------------------------------

//

CFbsBitmap* CGlxtnImageUtility::DecodeImageL(TRequestStatus& aStatus,

                const TDesC& aFileName, RArray<TSize>& aTargetSizes, TDisplayMode aMode)

    {

    TRACER("CFbsBitmap* CGlxtnImageUtility::DecodeImageL()");

    delete iDecoder;

    iDecoder = NULL;

	iDecoder = GlxtnImageDecoderFactory::NewL( iFs, aFileName );

    iOriginalSize = iDecoder->FrameInfo().iOverallSizeInPixels;

    if ( 0 == iOriginalSize.iWidth || 0 == iOriginalSize.iHeight )

        {

        User::Leave(KErrCorrupt);

        }

    TInt count = aTargetSizes.Count();

    TSize testSize;

    TSize targetSize;

    for ( TInt i = 0 ; i < count ; i++ )

        {

        testSize = aTargetSizes[i];

        AdjustSize(testSize, iOriginalSize);

        if( ( testSize.iWidth > targetSize.iWidth ) || ( testSize.iHeight > targetSize.iHeight ) )

            {

            targetSize = testSize;

            }

        }

    // Find max scaling factor which won't make image smaller than target size

    TInt shift = 3;

    while ( shift

            && ((iOriginalSize.iWidth >> shift) < targetSize.iWidth

                || (iOriginalSize.iHeight >> shift) < targetSize.iHeight ) )

        {

        shift--;

        }

    TInt roundUp = (1 << shift) - 1;  

    TSize loadSize((iOriginalSize.iWidth + roundUp) >> shift,

                    (iOriginalSize.iHeight + roundUp) >> shift);

    CFbsBitmap* image = new (ELeave) CFbsBitmap;

    CleanupStack::PushL(image);

    User::LeaveIfError(image->Create(loadSize, aMode));

    iDecoder->Convert(&aStatus, *image);

    CleanupStack::Pop(image);

    return image;

	}

// -----------------------------------------------------------------------------

// FreeDecoder

// -----------------------------------------------------------------------------

//

void CGlxtnImageUtility::FreeDecoder()

    {

    TRACER("void CGlxtnImageUtility::FreeDecoder()");

    delete iDecoder;

    iDecoder = NULL;

    }

// -----------------------------------------------------------------------------

// OriginalSize

// -----------------------------------------------------------------------------

//

const TSize& CGlxtnImageUtility::OriginalSize() const

    {

    TRACER("TSize& CGlxtnImageUtility::OriginalSize()");

    return iOriginalSize;

    }

//---------------------------------------------------------------------------

/**

    K-Nearest neighbour scaling for EColor64K.

    Code originally inherited from t_display.cpp by Toni Hemminki.

    Added windowing and further optimized by Jarmo Nikula 2006-2007.

    @param  aSrc       Source buffer pointer

    @param  aSrcStride Source buffer stride in bytes

    @param  aSrcCols   Source columns

    @param  aSrcRows   Source rows

    @param  aX   			 Source window top-left X-coordinate

    @param  aY   			 Source window top-left Y-coordinate

    @param  aW   			 Source window width

    @param  aH   			 Source window height

    @param  aDst       Destination buffer pointer

    @param  aDstStride Destination buffer stride in bytes

    @param  aDstCols   Destination columns, must be even

    @param  aDstRows   Destination rows

*/

// OPTION's for MMP file:

// Interleave assembly code with C, output can be found on txt-files on some BUILD directory:

// OPTION ARMCC --asm --interleave

// Modify optimization for ARM insturcion set and for maximum speed

// OPTION_REPLACE ARMCC --arm -Otime

/*    aSource->LockHeap();

    TUint16* sourceAddress = (TUint16*)aSource->DataAddress();

	aSource->UnlockHeap();

    aTarget->LockHeap();

    TUint16* targetAddress = (TUint16*)aTarget->DataAddress();

	aTarget->UnlockHeap();

    ScaleColor64K(sourceAddress, aSource->DataStride(), 

        sourceSize.iWidth, sourceSize.iHeight, 0, 0,  sourceSize.iWidth, sourceSize.iHeight,

        targetAddress, aTarget->DataStride(), 

        targetSize.iWidth, targetSize.iHeight);

*/

void CGlxtnImageUtility::FilterImageL(TRequestStatus* aStatus, CFbsBitmap* aSource, CFbsBitmap*& aFilteredSource, CFbsBitmap* aTarget)

    {

    TRACER("void CGlxtnImageUtility::FilterImageL()");

    TSize sourceSize(aSource->SizeInPixels());

    TSize targetSize(aTarget->SizeInPixels());

    TInt scalePercent = ((100*sourceSize.iWidth)/targetSize.iWidth) - 100;

    // no need to filter if close enough or smaller

    if ( scalePercent >= 2 && ( aTarget->DisplayMode() == EColor64K ) )

        {

        FilterL(aSource, aFilteredSource, scalePercent);

        }

    *aStatus = KRequestPending;

    User::RequestComplete(aStatus, KErrNone);

    }

// -----------------------------------------------------------------------------

// ScaleImageL

// -----------------------------------------------------------------------------

//

void CGlxtnImageUtility::ScaleImageL(TRequestStatus& aStatus, CFbsBitmap& aSrcBitmap,  

										const TRect& aSrcRect,	CFbsBitmap& aDstBitmap,

																	const TRect& aDstRect)

	{

    TRACER("void CGlxtnImageUtility::ScaleImageL(IHL)");

	if (!iScaler)

		{

		TInt option = MIHLScaler::EOptionUseBilinearInterpolation;

		iScaler = IHLScaler::CreateL(option);	

		}

	User::LeaveIfError(iScaler->Scale(aStatus, aSrcBitmap, aSrcRect, aDstBitmap, aDstRect));      

    }

void CGlxtnImageUtility::ScaleImage64kL(TRequestStatus* aStatus, CFbsBitmap* aSource, CFbsBitmap* aFilteredSource, CFbsBitmap* aTarget)

    {

    TRACER("void CGlxtnImageUtility::ScaleImage64kL()");

    TSize sourceSize(aSource->SizeInPixels());

    TSize targetSize(aTarget->SizeInPixels());

    TInt scalePercent = ((100*sourceSize.iWidth)/targetSize.iWidth) - 100;

    TRect targetRect(targetSize);

    TRect sourceRect(sourceSize);

    CFbsBitmap* sourceImage = aFilteredSource;

    if ( !aFilteredSource )

        {

        sourceImage = aSource;

        }

    if ( scalePercent < 2 )

        {

        if ( scalePercent > 0 )

            {

            sourceRect = targetRect;

            }

        sourceImage = aSource;

        }

    sourceImage->LockHeap();

    TUint16* sourceAddress = (TUint16*)sourceImage->DataAddress();

	sourceImage->UnlockHeap();

    aTarget->LockHeap();

    TUint16* targetAddress = (TUint16*)aTarget->DataAddress();

	aTarget->UnlockHeap();

    ScaleColor64K(sourceAddress, sourceImage->DataStride(), 

        sourceImage->SizeInPixels().iWidth, sourceImage->SizeInPixels().iHeight, 0, 0,  sourceImage->SizeInPixels().iWidth, sourceImage->SizeInPixels().iHeight,

        targetAddress, aTarget->DataStride(), 

        targetSize.iWidth, targetSize.iHeight);

/*    if ( !iBitGc )

        {

        iBitGc = CFbsBitGc::NewL();

        }

    CFbsBitmapDevice *bitmapDevice = CFbsBitmapDevice::NewL(aTarget);

    CleanupStack::PushL(bitmapDevice);

    iBitGc->Activate(bitmapDevice);

    iBitGc->DrawBitmap(targetRect, sourceImage, sourceRect); 

    CleanupStack::PopAndDestroy(bitmapDevice);

*/

    *aStatus = KRequestPending;

    User::RequestComplete(aStatus, KErrNone);

    }

void CGlxtnImageUtility::ScaleColor64K( TUint16* aSrc, TInt aSrcStride, TInt /*aSrcCols*/, TInt /*aSrcRows*/,

	  								TInt aX, TInt aY, TInt aW, TInt aH,

          		      TUint16* aDst, TInt aDstStride, TInt aDstCols, TInt aDstRows )

    {

    TRACER("void CGlxtnImageUtility::ScaleColor64K()");

    const TUint KPrecision = 16;

    TUint hInc = ( aW<< KPrecision ) / aDstCols;

    TUint vInc = ( aH << KPrecision ) / aDstRows;

    TUint v = 0;

    for ( TUint row = aDstRows; row > 0; --row )

        {

        TInt h = hInc * (aDstCols - 1);

        TUint linestart = aSrcStride * ( aY + ( v >> KPrecision ) ) / sizeof(TUint16) + aX;

        TUint16* src = &aSrc[ linestart ];

        TUint32* dst = (TUint32*)aDst + aDstCols / 2;

        TUint32 pxl2x;

        // This loop generates 11 assembly instructions per round

        // when using "--arm --Otime" options. Since two pixels are handled per round,

        // it means 5.5 instructions per pixel on average.

        do  {

            pxl2x = src[ h >> KPrecision ]<<16;

            h -= hInc;

            pxl2x |= src[ h >> KPrecision ];

            *--dst = pxl2x;

            // Compiler eliminates CMP instruction when substraction

            // is done inside the while () statement.

            } while ( ( h -= hInc ) >= 0 );

        v += vInc;

        aDst += aDstStride / sizeof(TUint16);

        }

    }

void CGlxtnImageUtility::FilterL( CFbsBitmap* aSource, CFbsBitmap*& aFilteredSource, TInt aFilterPercent )

	{

    TRACER("void CGlxtnImageUtility::FilterL()");

	if ( !aFilteredSource )

	    {

        TSize imageSize = aSource->SizeInPixels();

        aFilteredSource =  new (ELeave) CFbsBitmap;

        aFilteredSource->Create(imageSize, aSource->DisplayMode());

        CFbsBitmapDevice *bitmapDevice = CFbsBitmapDevice::NewL(aFilteredSource);

        if ( !iBitGc )

            {

            iBitGc = CFbsBitGc::NewL();

            }

        iBitGc->Activate(bitmapDevice);

        iBitGc->BitBlt(TPoint(), aSource, imageSize); 

        delete bitmapDevice;

        }

    TSize imageSize = aFilteredSource->SizeInPixels();

    aFilteredSource->LockHeap();

    TUint16* sourceAddress = (TUint16*)aFilteredSource->DataAddress();

	aFilteredSource->UnlockHeap();

	const TInt KGlxScalingNeeds4Filtering = 80; // if scaling more than 1.8 need to filter by 4

	const TInt KGlxScalingNeeds8Filtering = 260; // if scaling more than 3.6 need to filter by 8

	if ( KGlxScalingNeeds8Filtering < aFilterPercent )

	    {

       	FIRFiltering8( 

    		sourceAddress, aFilteredSource->DataStride() / sizeof(TUint16),

    		imageSize.iWidth, imageSize.iHeight );

	    }

	else if ( KGlxScalingNeeds4Filtering < aFilterPercent )

	    {

       	FIRFiltering4( 

    		sourceAddress, aFilteredSource->DataStride() / sizeof(TUint16),

    		imageSize.iWidth, imageSize.iHeight );

	    }

	else

	    {

       	FIRFiltering( 

    		sourceAddress, aFilteredSource->DataStride() / sizeof(TUint16),

    		imageSize.iWidth, imageSize.iHeight );

	    }

	}

#define rmask565	0xf800

#define gmask565	0x07e0

#define bmask565	0x001f

#define rbmask565	(rmask565|bmask565)

#define rm565( rgb ) 		((rgb) & rmask565)

#define gm565( rgb ) 		((rgb) & gmask565)

#define bm565( rgb ) 		((rgb) & bmask565)

#define rbm565( rgb ) 		((rgb) & rbmask565)

#define r565( rgb ) 		((rgb)>>11)

#define g565( rgb ) 		(gm565(rgb)>>5)

#define b565( rgb ) 		(bm565(rgb))

#define rgb565( r, g, b )	(((r)<<11)|((g)<<5)|(b))

#define mask32gbr655 0x07e0f81f

// Keep below three defs in sync with each other!

#define KFIRLen    2

#define KFIRCen	   (KFIRLen / 2)

#define incFIRIndex( i ) i = (i + 1) & (KFIRLen - 1)

// Keep above three defs in sync with each other!

void CGlxtnImageUtility::FIRFiltering(

		TUint16* aDst, TUint aDstStridep, TUint aDstCols, TUint aDstRows )

    {

    TRACER("void CGlxtnImageUtility::FIRFiltering( )");

    TUint firFifo[ KFIRLen ];

    TUint i; // index for fifo in&out

    TUint16 *p;

    TUint32 px;

    TInt row, col;

    TUint FIRsum;

    // Horizontal scan.

    p = aDst;

    for ( row = aDstRows - 1; row >= 0; row-- )

        {

        // read for cache

	    //for ( col = aDstCols - 1; col >= 0; col-- ) TInt temp = p[ col ];

        // Fill in the FIR first.

        // TODO: Fill in with extrapolated values at edges!

        FIRsum = ((KFIRLen / 2)<<21) | ((KFIRLen / 2)<<11) | (KFIRLen / 2); // for correct rounding

        i = 0;

        TUint32 mask1 = mask32gbr655;

	    for ( col = 0; col < KFIRLen; col++ )

	    	{

	    	px = p[ col ];

            px = ((px<<16) | px) & mask1;

	    	firFifo[ i ] = px;

	        FIRsum += px;

	    	incFIRIndex( i );

	    	}

        TUint32 ave;

	    for ( ; col < aDstCols; col++ )

	    	{

	    	ave = ( FIRsum / KFIRLen ) & mask1;

	    	p[ col - KFIRCen ] = TUint16( ave | (ave>>16) );

	        FIRsum -= firFifo[ i ];

	    	px = p[ col ];

            px = ((px<<16) | px) & mask1;

	    	firFifo[ i ] = px;

	        FIRsum += px;

	        incFIRIndex( i );

            }

        p += aDstStridep;

        }

    // Vertical scan.

    for ( col = aDstCols - 1; col >= 0; col-- )

        {

        // Fill in the FIR first.

        FIRsum = ((KFIRLen / 2)<<21) | ((KFIRLen / 2)<<11) | (KFIRLen / 2); // for correct rounding

        TUint32 mask1 = mask32gbr655;

        i = 0;

	    p = aDst + col;

	    for ( row = 0; row < KFIRLen; row++ )

	    	{

	    	px = *p;

            px = ((px<<16) | px) & mask1;

	    	firFifo[ i ] = px;

	        FIRsum += px;

	    	incFIRIndex( i );

	    	p += aDstStridep;

            }

        TUint32 ave;

    	p -= aDstStridep * KFIRCen;

	    for ( ; row < aDstRows; row++ )

	    	{

	    	ave = ( FIRsum / KFIRLen ) & mask1;

	    	p[0] = TUint16( ave | (ave>>16) );

	        FIRsum -= firFifo[ i ];

	    	px = p[ aDstStridep * KFIRCen ];

            px = ((px<<16) | px) & mask1;

	    	firFifo[ i ] = px;

	        FIRsum += px;

	    	incFIRIndex( i );

	        p += aDstStridep;

            }

        }

    }

//

// Keep below three defs in sync with each other!

#define KFIRLen4    4

#define KFIRCen4	   (KFIRLen4 / 2)

#define incFIRIndex4( i ) i = (i + 1) & (KFIRLen4 - 1)

// Keep above three defs in sync with each other!

void CGlxtnImageUtility::FIRFiltering4(

		TUint16* aDst, TUint aDstStridep, TUint aDstCols, TUint aDstRows )

    {

    TRACER("void CGlxtnImageUtility::FIRFiltering4()");

    TUint firFifo[ KFIRLen4 ];

    TUint i; // index for fifo in&out

    TUint16 *p;

    TUint32 px;

    TInt row, col;

    TUint FIRsum;

    // Horizontal scan.

    p = aDst;

    for ( row = aDstRows - 1; row >= 0; row-- )

        {

        // read for cache

	    //for ( col = aDstCols - 1; col >= 0; col-- ) TInt temp = p[ col ];

        // Fill in the FIR first.

        // TODO: Fill in with extrapolated values at edges!

        FIRsum = ((KFIRLen4 / 2)<<21) | ((KFIRLen4 / 2)<<11) | (KFIRLen4 / 2); // for correct rounding

        i = 0;

        TUint32 mask1 = mask32gbr655;

	    for ( col = 0; col < KFIRLen4; col++ )

	    	{

	    	px = p[ col ];

            px = ((px<<16) | px) & mask1;

	    	firFifo[ i ] = px;

	        FIRsum += px;

	    	incFIRIndex4( i );

	    	}

        TUint32 ave;

	    for ( ; col < aDstCols; col++ )

	    	{

	    	ave = ( FIRsum / KFIRLen4 ) & mask1;

	    	p[ col - KFIRCen4 ] = TUint16( ave | (ave>>16) );

	        FIRsum -= firFifo[ i ];

	    	px = p[ col ];

            px = ((px<<16) | px) & mask1;

	    	firFifo[ i ] = px;

	        FIRsum += px;

	        incFIRIndex4( i );

            }

        p += aDstStridep;

        }

    // Vertical scan.

    for ( col = aDstCols - 1; col >= 0; col-- )

        {

        // Fill in the FIR first.

        FIRsum = ((KFIRLen4 / 2)<<21) | ((KFIRLen4 / 2)<<11) | (KFIRLen4 / 2); // for correct rounding

        TUint32 mask1 = mask32gbr655;

        i = 0;

	    p = aDst + col;

	    for ( row = 0; row < KFIRLen4; row++ )

	    	{

	    	px = *p;

            px = ((px<<16) | px) & mask1;

	    	firFifo[ i ] = px;

	        FIRsum += px;

	    	incFIRIndex4( i );

	    	p += aDstStridep;

            }

        TUint32 ave;

    	p -= aDstStridep * KFIRCen4;