/*

* 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:    Classes for thumbnail-related tasks.

*

*/

/**

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

 */

#include "glxtngeneratethumbnailtask.h"

#include <bitdev.h>

#include <fbs.h>

#include <glxassert.h>

#include <glxlog.h>

#include <glxtracer.h>

#include <glxthumbnail.h>

#include "glxtnfileinfo.h"

#include "glxtnfileutility.h"

#include "glxtnimageutility.h"

#include "glxtnsavethumbnailtask.h"

#include "glxtntaskmanager.h"

#include "glxtnthumbnailrequest.h"

#include "glxtnvideoutility.h"

#include "mglxtnthumbnailcreatorclient.h"

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

// NewL

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

//

CGlxtnGenerateThumbnailTask* CGlxtnGenerateThumbnailTask::NewL(

        const TGlxThumbnailRequest& aRequestInfo,

        CGlxtnFileUtility& aFileUtility, MGlxtnThumbnailCreatorClient& aClient)

    {

    TRACER("CGlxtnGenerateThumbnailTask::NewL()");

    CGlxtnGenerateThumbnailTask* task

                = new (ELeave) CGlxtnGenerateThumbnailTask(

                                        aRequestInfo, aFileUtility, aClient);

    CleanupStack::PushL(task);

    task->ConstructL(aRequestInfo.iBitmapHandle);

    CleanupStack::Pop( task );

    return task;

    }

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

// Constructor

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

//

CGlxtnGenerateThumbnailTask::CGlxtnGenerateThumbnailTask(

        const TGlxThumbnailRequest& aRequestInfo,

        CGlxtnFileUtility& aFileUtility, MGlxtnThumbnailCreatorClient& aClient) :

    CGlxtnLoadThumbnailTask( KGlxtnTaskIdGenerateThumbnail,

                            aRequestInfo, aFileUtility, aClient )

	{

    TRACER("CGlxtnGenerateThumbnailTask::CGlxtnGenerateThumbnailTask()");

	}

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

// ConstructL

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

//

void CGlxtnGenerateThumbnailTask::ConstructL(TInt aBitmapHandle)

	{

    TRACER("CGlxtnGenerateThumbnailTask::ConstructL()");

	CGlxtnLoadThumbnailTask::ConstructL( aBitmapHandle );

    iImageUtility = new (ELeave) CGlxtnImageUtility(iFileUtility.FsSession());

	}

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

// Destructor

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

//

CGlxtnGenerateThumbnailTask::~CGlxtnGenerateThumbnailTask() 

	{

    TRACER("CGlxtnGenerateThumbnailTask::~CGlxtnGenerateThumbnailTask()");

	delete iImageUtility;

    delete iVideoUtility;

    delete iImage;

	}

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

// SetManager

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

//

void CGlxtnGenerateThumbnailTask::SetManager(CGlxtnTaskManager* aManager)

    {

    TRACER("void CGlxtnGenerateThumbnailTask::SetManager()");

    iTaskManager = aManager;

    }

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

// DoStartL

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

//

TBool CGlxtnGenerateThumbnailTask::DoStartL(TRequestStatus& aStatus)

    {

    TRACER("CGlxtnGenerateThumbnailTask::DoStartL()");

    iInfo = new (ELeave) CGlxtnFileInfo;

    Client().FetchFileInfoL(iInfo, ItemId(), &aStatus);

    iState = EStateFetchingUri;

    return ETrue; // Request has been issued

    } 

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

// DoCancel

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

//

void CGlxtnGenerateThumbnailTask::DoCancel() 

	{

    TRACER("void CGlxtnGenerateThumbnailTask::DoCancel()");

	CGlxtnLoadThumbnailTask::DoCancel();

	iImageUtility->Cancel();

	if ( iVideoUtility ) 

		{

		iVideoUtility->Cancel();

		}

    iFileUtility.ClearBadFileMarker();

	}

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

// DoRunL

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

//

TBool CGlxtnGenerateThumbnailTask::DoRunL(TRequestStatus& aStatus) 

	{

    TRACER("TBool CGlxtnGenerateThumbnailTask::DoRunL()");

	TInt error = aStatus.Int();

	TBool active = EFalse;

    if ( KErrNone == error )

        {

        switch ( iState )

            {

            case EStateFetchingUri:

                {

                User::LeaveIfNull(iInfo);

                iBadFileMarkerNotNeededFlag = ETrue;

                iInfo->IdentifyFileL(iVideo, iProtected);

                // leave if file is DRM protected and client has no DRM 

                // capablity

                if ( iProtected && !iDrmAllowed )

                    {

                    User::Leave(KErrAccessDenied);

                    }

                if ( !LoadThumbnailL( aStatus ) )

                    {

                    iBadFileMarkerNotNeededFlag = EFalse;

                    iFileUtility.CheckBadFileListL( iInfo->FilePath() );

                    HighQualityDecodeL( aStatus );

                    }

                active = ETrue;

                }

                break;

            case EStateLoading:

                active = HandleLoadedThumbnailL( aStatus );

                break;

            case EStateDecodingThumbnail:

                // Nothing to do

                break;

            case EStateDecodingImage:

                {

                iImageUtility->FreeDecoder();

                // Resize empty bitmap to required size

                TSize targetSize(iRequestedSize);

                iImageUtility->AdjustSize(targetSize, iImage->SizeInPixels());

                User::LeaveIfError(iThumbnail->Resize(targetSize));

                iImageUtility->FilterImageL(&aStatus, iImage, iImage, iThumbnail);

                iState = EStateFiltering;

                active = ETrue;

                }

                break;

            case EStateFiltering:

                {

                TSize targetSize(iRequestedSize);

                const TSize srcSize = iImage->SizeInPixels();

                iImageUtility->AdjustSize(targetSize, iImage->SizeInPixels());

                iImageUtility->ScaleImageL(aStatus, *iImage, srcSize, *iThumbnail, targetSize);

                iState = EStateScaling;

                active = ETrue;

                }

                break;

            case EStateScaling:

            	{

            	User::LeaveIfError(iThumbnail->SetDisplayMode(KGlxThumbnailDisplayMode));

                // Create task to save generated thumbnail

                if ( Storage() && !iInfo->iTemporary

                    && !SizeRequiresDrmRights()

                    && iFileUtility.IsPersistentSize(iRequestedSize) )

                    {

                    CGlxtnSaveThumbnailTask* task

                        = CGlxtnSaveThumbnailTask::NewL(ItemId(), iInfo,

                                        iRequestedSize, iThumbnail, Storage());

                    iThumbnail = NULL;  // Task has ownership

                    iInfo = NULL;       // Task has ownership

                    iTaskManager->AddTaskL(task);

                    }

                break;

            	}

            default:

                GLX_ASSERT_ALWAYS( EFalse, Panic( EGlxPanicIllegalState ),

                            "CGlxtnGenerateThumbnailTask: Illegal state" );

                break;

            }

        }

    else

        {

        if ( EStateLoading == iState )

            {

            // Loading failed - generate new thumbnail instead

            HighQualityDecodeL( aStatus );

            active = ETrue;

            }

        }

    if ( !active )

        {

        if ( !iBadFileMarkerNotNeededFlag )

            {

            iFileUtility.ClearBadFileMarker();

            }

        Client().ThumbnailFetchComplete(ItemId(),

                                        EGlxThumbnailQualityHigh, error);

        }

    return active; 

	}

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

// DoRunError

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

//

TBool CGlxtnGenerateThumbnailTask::DoRunError(TInt aError)

    {

    TRACER("TBool CGlxtnGenerateThumbnailTask::DoRunError(TInt aError)");

    iFileUtility.ClearBadFileMarker();

    Client().ThumbnailFetchComplete(ItemId(), EGlxThumbnailQualityHigh, aError);

    return EFalse;

    }

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

// HighQualityDecodeL

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

//

void CGlxtnGenerateThumbnailTask::HighQualityDecodeL(

                                                TRequestStatus& aStatus )

    {

    TRACER("void CGlxtnGenerateThumbnailTask::HighQualityDecodeL()");

    RArray<TSize> targetSizes;

    CleanupClosePushL(targetSizes);

    targetSizes.AppendL( TSize(iRequestedSize) );

    if ( iVideo )

        {

        iVideoUtility = new (ELeave) CGlxtnVideoUtility;

        iVideoUtility->GetVideoFrameL( &aStatus, iImage, iInfo->FilePath(), targetSizes, KGlxThumbnailDisplayMode );

        }

    else

        {

        iImage = iImageUtility->DecodeImageL( aStatus, iInfo->FilePath(),

                                    targetSizes, KGlxThumbnailDisplayMode );

        }

    CleanupStack::PopAndDestroy(&targetSizes);

    iState = EStateDecodingImage;

    }

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

// SizeRequiresDrmRights

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

//

TBool CGlxtnGenerateThumbnailTask::SizeRequiresDrmRights()

    {

    TRACER("TBool CGlxtnGenerateThumbnailTask::SizeRequiresDrmRights()");

    if ( iProtected )

        {

        if ( iVideo )

            {

            return ETrue;

            }

        // Rights are required if thumbnail doesn't fit in KGlxThumbnailDrmWidth

        // by KGlxThumbnailDrmHeight box either portrait or landscape

        if ( (iRequestedSize.iWidth > KGlxThumbnailDrmWidth

                || iRequestedSize.iHeight > KGlxThumbnailDrmHeight)

            && (iRequestedSize.iWidth > KGlxThumbnailDrmHeight

                || iRequestedSize.iHeight > KGlxThumbnailDrmWidth) )

            {

            return ETrue;

            }

        const TSize& imageSize(iImageUtility->OriginalSize());

        // Rights are required if thumbnail is greater than 25% of image size

        // Due to preserving aspect ratio, this will only happen if both width

        // and height are greater than half the image width and height

        if ( iRequestedSize.iWidth > imageSize.iWidth / 2

            && iRequestedSize.iHeight> imageSize.iHeight / 2 )

            {

            return ETrue;

            }

        }

    return EFalse;

    }