/*

* Copyright (c) 2006-2007 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:  Image thumbnail decoder

 *

*/

//INCLUDE FILES

#include <e32base.h>

#include <imageconversion.h>

#include <ExifRead.h>

#include <IclExtJpegApi.h>

#include "thumbnailimagedecoderv2.h"

#include "thumbnaillog.h"

#include "thumbnailpanic.h"

#include "thumbnailmanagerconstants.h"

// ============================ MEMBER FUNCTIONS ===============================

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

// CThumbnailImageDecoder::CThumbnailImageDecoder()

// C++ default constructor can NOT contain any code, that might leave.

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

//

CThumbnailImageDecoderv2::CThumbnailImageDecoderv2( RFs& aFs): CActive(

    EPriorityStandard ), iFs( aFs )

    {

    CActiveScheduler::Add( this );

    }

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

// CThumbnailImageDecoder::~CThumbnailImageDecoder()

// Destructor.

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

//

CThumbnailImageDecoderv2::~CThumbnailImageDecoderv2()

    {

    Release();

    }

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

// CThumbnailImageDecoder::CreateL()

// Creates thumbnail of image

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

//

void CThumbnailImageDecoderv2::CreateL(TDesC8& aBuffer, MThumbnailProviderObserver& aObserver)

    {

    TN_DEBUG1( "CThumbnailImageDecoderv2::CreateL() start" );

    iBuffer = &aBuffer;

    iObserver = &aObserver;

    CreateDecoderL();

    TN_DEBUG1( "CThumbnailImageDecoderv2::CreateL() end" );

    }

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

// CThumbnailImageDecoder::DecodeL()

// Decode the thumbnail image

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

//

void CThumbnailImageDecoderv2::DecodeL( )

    {

    TN_DEBUG1( "CThumbnailImageDecoderv2::DecodeL() start" );

    // Create the bitmap

    if ( !iBitmap )

        {

        iBitmap = new( ELeave )CFbsBitmap();

        }

	//set displaymode from global constants

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

    while ( iStatus == KErrUnderflow )

        {

        iDecoder->ContinueConvert( &iStatus );

        }

    SetActive();  

    TN_DEBUG1( "CThumbnailImageDecoderv2::DecodeL() end" );

    }

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

// CThumbnailImageDecoder::Release()

// Releases resources

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

//

void CThumbnailImageDecoderv2::Release()

    {

    Cancel();

    delete iDecoder;

    iDecoder = NULL;

    }

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

// CThumbnailImageDecoder::DoCancel()

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

//

void CThumbnailImageDecoderv2::DoCancel()

    {

    if ( iDecoder )

        {

        iDecoder->Cancel();

        delete iDecoder;

        iDecoder = NULL;

        }

    }

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

// CThumbnailImageDecoder::RunL()

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

//

void CThumbnailImageDecoderv2::RunL()

    {

    // This call takes ownership of iBitmap

    // EXIF always false

    // Rotated always false

    iObserver->ThumbnailProviderReady( iStatus.Int(), iBitmap, iOriginalSize, EFalse, EFalse);

    iBitmap = NULL; // owned by server now

    iBuffer = NULL;

    Release();

    }

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

// CThumbnailImageDecoder::CreateDecoderL

// Creates image decoder

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

//

void CThumbnailImageDecoderv2::CreateDecoderL()

    {

    TN_DEBUG1( "CThumbnailImageDecoderv2::CreateDecoderL() start" );

    delete iDecoder;

    iDecoder = NULL;

    CImageDecoder::TOptions options = ( CImageDecoder::TOptions )( 

            CImageDecoder::EOptionNoDither | CImageDecoder::EPreferFastDecode | CImageDecoder::EOptionAlwaysThread );

    TRAPD( decErr, iDecoder = CExtJpegDecoder::DataNewL( 

            CExtJpegDecoder::EHwImplementation, iFs, *iBuffer, options ));

    if ( decErr != KErrNone )

        {

        TN_DEBUG2( "CThumbnailImageDecoderv2::CreateDecoderL() - HW CExtJpegDecoder failed = %d", decErr );

        TRAP( decErr, iDecoder = CExtJpegDecoder::DataNewL(

                CExtJpegDecoder::ESwImplementation, iFs, *iBuffer, options ));

        if ( decErr != KErrNone )

            {

            TN_DEBUG2( "CThumbnailImageDecoderv2::CreateDecoderL() - SW CExtJpegDecoder failed %d", decErr);

            LeaveIfCorruptL( decErr );

            TRAP( decErr, iDecoder = CImageDecoder::DataNewL( iFs, *iBuffer, KJpegMime(), options ) );

            if ( decErr != KErrNone )

                {                  

                TN_DEBUG2( "CThumbnailImageDecoderv2::CreateDecoderL() - CImageDecoder failed %d", decErr);

                LeaveIfCorruptL( decErr );

                // don't force any mime type

                TRAPD( decErr, iDecoder = CImageDecoder::DataNewL( iFs, *iBuffer, options ) );

                if ( decErr != KErrNone )

                    {                    

                    TN_DEBUG2( "CThumbnailImageDecoderv2::CImageDecoder() - CImageDecoder no mime error %d", decErr  );

                    User::Leave( decErr );

                    }

                }

            TN_DEBUG1( "CThumbnailImageDecoderv2::CreateDecoderL() - CImageDecoder created" );

            }

        else

            {

            TN_DEBUG1( "CThumbnailImageDecoderv2:CreateDecoderL() - SW CExtJpegDecoder created" );

            }               

        }

    else

        {

        TN_DEBUG1( "CThumbnailImageDecoderv2::CreateDecoderL() - HW CExtJpegDecoder created" );

        }

    TN_DEBUG1( "CThumbnailImageDecoderv2::CreateDecoderL() end" );

    }

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

// CThumbnailImageDecoderv2::LeaveIfCorruptL()

// Leave if image is corrupted

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

//

void CThumbnailImageDecoderv2::LeaveIfCorruptL(const TInt aError )

    {

    //no sense to try other codecs if image is corrupted

    if( aError == KErrCorrupt || aError == KErrUnderflow)

        {

        User::Leave( aError );

        }

    }

//End of file