imagehandlingutilities/thumbnailmanager/plugins/image/src/thumbnailimagedecoderv2.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Fri, 16 Apr 2010 15:16:16 +0300
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permissions -rw-r--r--
Revision: 201011 Kit: 201015
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/*
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* Copyright (c) 2006-2007 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:  Image thumbnail decoder
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 *
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*/
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//INCLUDE FILES
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#include <e32base.h>
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#include <imageconversion.h>
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#include <ExifRead.h>
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#include <IclExtJpegApi.h>
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#include "thumbnailimagedecoderv2.h"
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#include "thumbnaillog.h"
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#include "thumbnailpanic.h"
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#include "thumbnailmanagerconstants.h"
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// ============================ MEMBER FUNCTIONS ===============================
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//------------------------------------------------------------------------
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// CThumbnailImageDecoder::CThumbnailImageDecoder()
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// C++ default constructor can NOT contain any code, that might leave.
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// ---------------------------------------------------------------------------
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//
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CThumbnailImageDecoderv2::CThumbnailImageDecoderv2( RFs& aFs): CActive(
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    EPriorityStandard ), iFs( aFs )
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    {
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    CActiveScheduler::Add( this );
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    }
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// ---------------------------------------------------------------------------
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// CThumbnailImageDecoder::~CThumbnailImageDecoder()
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// Destructor.
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// ---------------------------------------------------------------------------
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//
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CThumbnailImageDecoderv2::~CThumbnailImageDecoderv2()
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    {
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    Release();
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    }
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// -----------------------------------------------------------------------------
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// CThumbnailImageDecoder::CreateL()
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// Creates thumbnail of image
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// -----------------------------------------------------------------------------
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//
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void CThumbnailImageDecoderv2::CreateL(TDesC8& aBuffer, MThumbnailProviderObserver& aObserver)
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    {
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    TN_DEBUG1( "CThumbnailImageDecoderv2::CreateL() start" );
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    iBuffer = &aBuffer;
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    iObserver = &aObserver;
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    CreateDecoderL();
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    TN_DEBUG1( "CThumbnailImageDecoderv2::CreateL() end" );
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    }
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// -----------------------------------------------------------------------------
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// CThumbnailImageDecoder::DecodeL()
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// Decode the thumbnail image
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// -----------------------------------------------------------------------------
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//
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void CThumbnailImageDecoderv2::DecodeL( )
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    {
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    TN_DEBUG1( "CThumbnailImageDecoderv2::DecodeL() start" );
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    // Create the bitmap
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    if ( !iBitmap )
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        {
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        iBitmap = new( ELeave )CFbsBitmap();
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        }
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	//set displaymode from global constants
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    TInt err = iBitmap->Create( iDecoder->FrameInfo().iOverallSizeInPixels, iDecoder->FrameInfo().iFrameDisplayMode);
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    if (err != KErrNone)
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        {
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        delete iBitmap;
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        iBitmap = NULL;
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        User::Leave(err);
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        }
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0
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    iDecoder->Convert( &iStatus, * iBitmap );
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    while ( iStatus == KErrUnderflow )
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        {
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        iDecoder->ContinueConvert( &iStatus );
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        }
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    SetActive();  
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    TN_DEBUG1( "CThumbnailImageDecoderv2::DecodeL() end" );
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    }
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// -----------------------------------------------------------------------------
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// CThumbnailImageDecoder::Release()
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// Releases resources
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// -----------------------------------------------------------------------------
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//
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void CThumbnailImageDecoderv2::Release()
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    {
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    Cancel();
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    delete iDecoder;
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    iDecoder = NULL;
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    }
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// -----------------------------------------------------------------------------
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// CThumbnailImageDecoder::DoCancel()
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// -----------------------------------------------------------------------------
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//
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void CThumbnailImageDecoderv2::DoCancel()
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    {
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    if ( iDecoder )
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        {
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        iDecoder->Cancel();
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        delete iDecoder;
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        iDecoder = NULL;
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        }
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    }
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// -----------------------------------------------------------------------------
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// CThumbnailImageDecoder::RunL()
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// -----------------------------------------------------------------------------
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//
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void CThumbnailImageDecoderv2::RunL()
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    {
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    // This call takes ownership of iBitmap
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    // EXIF always false
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    // Rotated always false
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    iObserver->ThumbnailProviderReady( iStatus.Int(), iBitmap, iOriginalSize, EFalse, EFalse);
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    iBitmap = NULL; // owned by server now
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    iBuffer = NULL;
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    Release();
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    }
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// -----------------------------------------------------------------------------
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// CThumbnailImageDecoder::CreateDecoderL
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// Creates image decoder
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// -----------------------------------------------------------------------------
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//
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void CThumbnailImageDecoderv2::CreateDecoderL()
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    {
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    TN_DEBUG1( "CThumbnailImageDecoderv2::CreateDecoderL() start" );
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    delete iDecoder;
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    iDecoder = NULL;
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    CImageDecoder::TOptions options = ( CImageDecoder::TOptions )( 
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            CImageDecoder::EOptionNoDither | CImageDecoder::EPreferFastDecode | CImageDecoder::EOptionAlwaysThread );
0
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    TRAPD( decErr, iDecoder = CExtJpegDecoder::DataNewL( 
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            CExtJpegDecoder::EHwImplementation, iFs, *iBuffer, options ));
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    if ( decErr != KErrNone )
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        {
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        TN_DEBUG2( "CThumbnailImageDecoderv2::CreateDecoderL() - HW CExtJpegDecoder failed = %d", decErr );
0
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        TRAP( decErr, iDecoder = CExtJpegDecoder::DataNewL(
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                CExtJpegDecoder::ESwImplementation, iFs, *iBuffer, options ));
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        if ( decErr != KErrNone )
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            {
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            TN_DEBUG2( "CThumbnailImageDecoderv2::CreateDecoderL() - SW CExtJpegDecoder failed %d", decErr);
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            LeaveIfCorruptL( decErr );
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0
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            TRAP( decErr, iDecoder = CImageDecoder::DataNewL( iFs, *iBuffer, KJpegMime(), options ) );
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            if ( decErr != KErrNone )
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                {                  
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                TN_DEBUG2( "CThumbnailImageDecoderv2::CreateDecoderL() - CImageDecoder failed %d", decErr);
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                LeaveIfCorruptL( decErr );
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0
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                // don't force any mime type
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                TRAPD( decErr, iDecoder = CImageDecoder::DataNewL( iFs, *iBuffer, options ) );
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                if ( decErr != KErrNone )
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                    {                    
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                    TN_DEBUG2( "CThumbnailImageDecoderv2::CImageDecoder() - CImageDecoder no mime error %d", decErr  );
0
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                    User::Leave( decErr );
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                    }
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                }
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            TN_DEBUG1( "CThumbnailImageDecoderv2::CreateDecoderL() - CImageDecoder created" );
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            }
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        else
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            {
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            TN_DEBUG1( "CThumbnailImageDecoderv2:CreateDecoderL() - SW CExtJpegDecoder created" );
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            }               
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        }
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    else
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        {
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        TN_DEBUG1( "CThumbnailImageDecoderv2::CreateDecoderL() - HW CExtJpegDecoder created" );
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        }
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    TN_DEBUG1( "CThumbnailImageDecoderv2::CreateDecoderL() end" );
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    }
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// -----------------------------------------------------------------------------
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// CThumbnailImageDecoderv2::LeaveIfCorruptL()
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// Leave if image is corrupted
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// -----------------------------------------------------------------------------
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//
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void CThumbnailImageDecoderv2::LeaveIfCorruptL(const TInt aError )
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    {
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    //no sense to try other codecs if image is corrupted
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    if( aError == KErrCorrupt || aError == KErrUnderflow)
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        {
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        User::Leave( aError );
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        }
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    }
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0
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//End of file