/*

* 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:    Texture Manager component/Decodes the Image in step for large sized images

 *

*/

// INCLUDE FILES

#include "glxbitmapdecoderwrapper.h"

#include <glxtracer.h>      //  For Log

#include <bitmaptransforms.h>

#include <imageconversion.h>

#include <ExifRead.h>

#include <glxlog.h>

#include <hal.h>

#include <hal_data.h>

#include <mglxcache.h>

#include <oommonitorsession.h>

namespace

{

const TInt KGlxDecodingThreshold = 3000000;

// Photos low_ram_threshold [8.637 MB] as in oomconfig.xml

const TInt KGlxCriticalRAMForPhotos = 9056550;

const TInt KGlxDecodeBitmapFactor = 3;

// All EXIF data is within the first KGlxMaxExifSize bytes of the file

const TInt KGlxMaxExifSize = 0x10000;

}

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

// Two-phased constructor.

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

//

CGlxBitmapDecoderWrapper* CGlxBitmapDecoderWrapper::NewL(MGlxBitmapDecoderObserver* aObserver)

    {

    TRACER("CGlxBitmapDecoderWrapper:: NewL ");

    CGlxBitmapDecoderWrapper* self = new(ELeave)CGlxBitmapDecoderWrapper();

    CleanupStack::PushL(self);

    self->ConstructL(aObserver);

    CleanupStack::Pop(self);

    return self;

    }

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

// Constructor

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

//

CGlxBitmapDecoderWrapper::CGlxBitmapDecoderWrapper()

                         :CActive( EPriorityLow )

		        {

		        TRACER("CGlxBitmapDecoderWrapper:: NewL ");

		        }		

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

// Destructor

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

//

CGlxBitmapDecoderWrapper::~CGlxBitmapDecoderWrapper()

    {

    TRACER("CGlxBitmapDecoderWrapper:: ~CGlxBitmapDecoderWrapper ");

    iFs.Close();

    Cancel();

    if (iImageDecoder)

        {

        delete iImageDecoder;

        iImageDecoder = NULL;

        }

    }

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

// ConstructL

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

void CGlxBitmapDecoderWrapper::ConstructL(MGlxBitmapDecoderObserver* aObserver)

    {

    TRACER("CGlxBitmapDecoderWrapper::ConstructL ");

    iObserver = aObserver;

    User::LeaveIfError(iFs.Connect());

    CActiveScheduler::Add( this );

    }

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

// DoDecodeImageL

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

void CGlxBitmapDecoderWrapper::DoDecodeImageL(const TDesC & aSourceFileName,TInt aIndex)

    {

    TRACER("CGlxBitmapDecoderWrapper:: DoDecodeImageL ");

    iThumbnailIndex = aIndex;

    //Variable used to get the decoder type used

    TBool isExtDecoderUsed = ETrue;

#ifdef _DEBUG

    iDecodeProcessstartTime.HomeTime();

#endif                          

    if (iImageDecoder)

        {

        delete iImageDecoder;

        iImageDecoder = NULL;

        }

    // Use extended JPEG decoder

    TRAPD( err, iImageDecoder = CExtJpegDecoder::FileNewL(

    if ( KErrNone != err )

        {

        GLX_LOG_INFO( "DoDecodeImageL:: ESwImplementation" );

        TRAP(err,iImageDecoder = CExtJpegDecoder::FileNewL(

        if ( KErrNone != err )

            {

            GLX_LOG_INFO( "DoDecodeImageL:: CImageDecoder" );

            // Not a JPEG - use standard decoder

            isExtDecoderUsed = EFalse;

            }

        }

#ifdef _DEBUG

        iStopTime.HomeTime();

        GLX_DEBUG1("=== DECODER CREATION ===");

        GLX_DEBUG2("Decoder Creation took <%d> us", 

                   (TInt)iStopTime.MicroSecondsFrom(iDecodeProcessstartTime).Int64());   

#endif                          

    TSize imageSize = iImageDecoder->FrameInfo().iOverallSizeInPixels;

    if(isExtDecoderUsed)

        {

        TUint16 orientation=0;

        //Read the orientation from the Exif header of the image if present

        TRAPD(error, orientation=GetOrientationL(aSourceFileName));

        if(KErrNone == error )

            {

            //Get the rotation angle and the flip status from orientation

            TInt rotAngle = 0;

            TBool flipStatus = EFalse;

            GetRotationParameters(orientation, rotAngle, flipStatus);

            //Set the parameters to the decoder

            CExtJpegDecoder* extDecoder = (CExtJpegDecoder*)iImageDecoder;

            extDecoder->SetRotationL(rotAngle);

            if(flipStatus)

                {

                extDecoder->SetMirroringL();

                }

            //Switch Image Height and width in case orientation > 4 as that 

            //corresponds to angles 180 and 270 degrees

            if (orientation > 4)

                {

                imageSize.SetSize(imageSize.iHeight,imageSize.iWidth);

                }

            }

        }

    iOriginalSize.iWidth = imageSize.iWidth;

    iOriginalSize.iHeight = imageSize.iHeight;

    if (iBitmap)

        {

        delete iBitmap;

        iBitmap = NULL;

        }

    DecodeImageL();

    }

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

// DecodeImageL

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

//

void CGlxBitmapDecoderWrapper::DecodeImageL()

    {

    TRACER("CGlxBitmapDecoderWrapper:: DecodeImageL ");

    TReal32 mFactor = 1;

    //Set Size according to level and state

    TReal32 width = iOriginalSize.iWidth;

    TReal32 height = iOriginalSize.iHeight;

    GLX_LOG_INFO1("DecodeImageL:width=%f", width);

    GLX_LOG_INFO1("DecodeImageL:height=%f",height);

    if ( KGlxDecodingThreshold < (width * height))

        {

        }

    // create the destination bitmap

    if(!iBitmap)

        {

        TInt freeMemory = 0;

        HAL::Get( HALData::EMemoryRAMFree, freeMemory );

        width*=mFactor;

        height*=mFactor;

        TInt minmemorytodecode = KGlxDecodeBitmapFactor*width*height;     

        GLX_LOG_INFO2("DecodeImageL: after factoring width=%f, height=%f", width, height);

        GLX_LOG_INFO2("DecodeImageL:minmemorytodecode=%d, freememory=%d",

                minmemorytodecode, freeMemory);

        if(minmemorytodecode < (freeMemory - KGlxCriticalRAMForPhotos))

            {

            GLX_LOG_INFO("DecodeImageL:RAM available decoding image");

            iBitmap = new (ELeave) CFbsBitmap();

            iBitmap->Create( TSize(width,height),iImageDecoder->FrameInfo().iFrameDisplayMode );

#ifdef _DEBUG

            iStartTime.HomeTime(); // Get home time

#endif                          

            iImageDecoder->Convert( &iStatus, *iBitmap );

            }

        else

            {

            //case when sufficient memory is not available

            //request OOM FW to release the required memory

            GLX_LOG_INFO("DecodeImageL:insufficient RAM - request OOM");

            TInt err = OOMRequestFreeMemoryL(minmemorytodecode);

            if(err == KErrNoMemory)

                {

                //if OOM fails, release Photos Cache

                GLX_LOG_INFO("DecodeImageL:insufficient RAM - OOM failed - request Cache");

                MGlxCache* cacheManager = MGlxCache::InstanceL();

                cacheManager->ReleaseRAML(ETrue);            

                cacheManager->Close();

                //Try and release memory again

                err = OOMRequestFreeMemoryL(minmemorytodecode);

                }

            if(err != KErrNoMemory)

                {

                GLX_LOG_INFO("DecodeImageL:Sufficient RAM available");

                iBitmap = new (ELeave) CFbsBitmap();

                iBitmap->Create( TSize(width,height),iImageDecoder->FrameInfo().iFrameDisplayMode );

#ifdef _DEBUG

	            iStartTime.HomeTime(); // Get home time

#endif                          

                iImageDecoder->Convert( &iStatus, *iBitmap );

                }

            else

                {

                GLX_LOG_INFO("NOT ENOUGH MEMORY - Using the Fullscreen Thumbnail For Zoom");

                //release the file held by decoder immediately.

                iImageDecoder->Cancel();

                delete iImageDecoder;

                iImageDecoder = NULL;

                //Inform the client that there is no decode happened and there we take care 

                //of showing the fullscreen thumbnail.

                iObserver->HandleBitmapDecodedL(iThumbnailIndex,NULL);

                return;                

                }

            }

        SetActive();

        }

    }

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

// RunL

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

//

void CGlxBitmapDecoderWrapper::RunL()

    {

    TRACER("CGlxBitmapDecoderWrapper:: RunL ");

    if( iStatus == KErrNone )

        {

        iObserver->HandleBitmapDecodedL(iThumbnailIndex,iBitmap);

        iBitmap = NULL;

        //release the file held by decoder immediately.

        GLX_LOG_INFO( " CGlxBitmapDecoderWrapper::RunL:Decoding Finished" );

        iImageDecoder->Cancel();

        delete iImageDecoder;

        iImageDecoder = NULL;

#ifdef _DEBUG

        iStopTime.HomeTime();

        GLX_DEBUG1("=== IMAGE DECODE ===");

        GLX_DEBUG2("=>Image Decode Took took <%d> us", 

                       (TInt)iStopTime.MicroSecondsFrom(iStartTime).Int64());            

#endif                          

        }

    }

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

// DoCancel

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

//

void CGlxBitmapDecoderWrapper::DoCancel()

    {

    TRACER("CGlxBitmapDecoderWrapper:: DoCancel ");

    if(iImageDecoder)

        {

        GLX_LOG_INFO( " CGlxBitmapDecoderWrapper::DoCancel:Deleting" );

        iImageDecoder->Cancel();

        delete iImageDecoder;

        iImageDecoder = NULL;

        }

    if(iBitmap)

        {

        delete iBitmap;

        iBitmap = NULL;

        }

    }

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

// GetOrientationL

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

//

TUint16 CGlxBitmapDecoderWrapper::GetOrientationL(const TDesC& aFileName)

    {

    TRACER("CGlxBitmapDecoderWrapper:: GetOrientationL ");

    //Get Exif Metadata and the orientation tag from the file first

            RFile file;

            CleanupClosePushL(file);

            User::LeaveIfError(file.Open(iFs,

                    aFileName, EFileRead));

            TInt size;

            User::LeaveIfError(file.Size(size));

            if ( KGlxMaxExifSize < size )

                {

                size = KGlxMaxExifSize;

                }

            TUint16 orientation = 9;

            HBufC8* exifData = HBufC8::NewLC(size);

            TPtr8 ptr(exifData->Des());

            User::LeaveIfError(file.Read(ptr));

            CExifRead* exifReader = NULL;

            TRAPD(exifErr,exifReader = CExifRead::NewL(*exifData, CExifRead::ENoJpeg));

            if(exifErr == KErrNone)

                {

                CleanupStack::PushL(exifReader);

                TInt readErr = exifReader->GetOrientation(orientation);

                if(readErr != KErrNone)

                    {

                    orientation = 9;

                    }

                CleanupStack::PopAndDestroy(exifReader);

                }

            CleanupStack::PopAndDestroy(exifData);

            //Close and pop file Session

            CleanupStack::PopAndDestroy(&file);

            return orientation;

    }

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

// DoCancel

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

//

void CGlxBitmapDecoderWrapper::GetRotationParameters(TUint16 aOrientation, TInt& aRotAngle, TBool& aFlipStatus) 

    {

    TRACER("CGlxBitmapDecoderWrapper:: DoCancel ");

    //Get the orientation and set rotation on the decoder 

    //as well as update the original size

    aRotAngle =  0;

    aFlipStatus = EFalse;

    TInt isOrientationOdd = aOrientation%2;

    if(aOrientation>8)

        {

        return;

        }

    if(aOrientation >= 3 && aOrientation < 5)

        {

        aRotAngle = 180;

        }

    else if(aOrientation >= 5 && aOrientation < 7)

        {

        aRotAngle = 90;

        }

    else if(aOrientation >= 7 && aOrientation <= 8)

        {

        aRotAngle = 270;

        }

    if(aOrientation>4 )

        {

        if(isOrientationOdd )

            {

            aFlipStatus = ETrue;

            }

        }   

    }

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

// OOMRequestFreeMemoryL

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

//

TInt CGlxBitmapDecoderWrapper::OOMRequestFreeMemoryL( TInt aBytesRequested)

    {

    TRACER("CGlxBitmapDecoderWrapper::OOMRequestFreeMemoryL");

    GLX_LOG_INFO1("CGlxBitmapDecoderWrapper::OOMRequestFreeMemoryL() aBytesRequested=%d",

            aBytesRequested);

    ROomMonitorSession oomMonitor;

    User::LeaveIfError( oomMonitor.Connect() );

    // No leaving code after this point, so no need to use cleanup stack

    // for oomMonitor

    TInt errorCode = oomMonitor.RequestFreeMemory( aBytesRequested );

    GLX_LOG_INFO1("CGlxBitmapDecoderWrapper::OOMRequestFreeMemoryL(1) errorCode=%d",errorCode);

    if ( errorCode != KErrNone )

        {

        // try one more time 

        errorCode = oomMonitor.RequestFreeMemory( aBytesRequested );

        GLX_LOG_INFO1("CGlxBitmapDecoderWrapper::OOMRequestFreeMemoryL(2) errorCode=%d",errorCode);

        }

    oomMonitor.Close();

    return errorCode;

    }