photosgallery/collectionframework/thumbnailcreator/src/glxtnquickthumbnailtask.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/photosgallery/collectionframework/thumbnailcreator/src/glxtnquickthumbnailtask.cpp Thu Dec 17 08:45:44 2009 +0200
@@ -0,0 +1,353 @@
+/*
+* 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 "glxtnquickthumbnailtask.h"
+
+#include <ExifRead.h>
+#include <glxassert.h>
+#include <glxtracer.h>
+#include <imageconversion.h>
+
+#include "glxtnfileinfo.h"
+#include "glxtnfileutility.h"
+#include "glxtnimagedecoderfactory.h"
+#include "glxtnthumbnailrequest.h"
+#include "glxtnvideoutility.h"
+#include "mglxtnthumbnailcreatorclient.h"
+
+
+// All EXIF data is within the first KGlxMaxExifSize bytes of the file
+const TInt KGlxMaxExifSize = 0x10000;
+
+// -----------------------------------------------------------------------------
+// NewL
+// -----------------------------------------------------------------------------
+//
+CGlxtnQuickThumbnailTask* CGlxtnQuickThumbnailTask::NewL(
+ const TGlxThumbnailRequest& aRequestInfo,
+ CGlxtnFileUtility& aFileUtility, MGlxtnThumbnailCreatorClient& aClient)
+ {
+ TRACER("CGlxtnQuickThumbnailTask::NewL()");
+ CGlxtnQuickThumbnailTask* task = new (ELeave) CGlxtnQuickThumbnailTask(
+ aRequestInfo, aFileUtility, aClient);
+ CleanupStack::PushL(task);
+ task->ConstructL(aRequestInfo.iBitmapHandle);
+ CleanupStack::Pop( task );
+ return task;
+ }
+
+// -----------------------------------------------------------------------------
+// Constructor
+// -----------------------------------------------------------------------------
+//
+CGlxtnQuickThumbnailTask::CGlxtnQuickThumbnailTask(
+ const TGlxThumbnailRequest& aRequestInfo,
+ CGlxtnFileUtility& aFileUtility,
+ MGlxtnThumbnailCreatorClient& aClient ) :
+ CGlxtnLoadThumbnailTask( KGlxtnTaskIdQuickThumbnail,
+ aRequestInfo, aFileUtility, aClient ),
+ iQuality( EGlxThumbnailQualityLow )
+ {
+ TRACER("CGlxtnQuickThumbnailTask::CGlxtnQuickThumbnailTask()");
+ }
+
+// -----------------------------------------------------------------------------
+// Destructor
+// -----------------------------------------------------------------------------
+//
+CGlxtnQuickThumbnailTask::~CGlxtnQuickThumbnailTask()
+ {
+ TRACER("CGlxtnQuickThumbnailTask::~CGlxtnQuickThumbnailTask()");
+ delete iUtility;
+ delete iVideoFrame;
+ }
+
+// -----------------------------------------------------------------------------
+// DoStartL
+// -----------------------------------------------------------------------------
+//
+TBool CGlxtnQuickThumbnailTask::DoStartL(TRequestStatus& aStatus)
+ {
+ TRACER("TBool CGlxtnQuickThumbnailTask::DoStartL()");
+ iInfo = new (ELeave) CGlxtnFileInfo;
+ Client().FetchFileInfoL(iInfo, ItemId(), &aStatus);
+ iState = EStateFetchingUri;
+
+ return ETrue;
+ }
+
+// -----------------------------------------------------------------------------
+// DoCancel
+// -----------------------------------------------------------------------------
+//
+void CGlxtnQuickThumbnailTask::DoCancel()
+ {
+ TRACER("void CGlxtnQuickThumbnailTask::DoCancel()");
+ CGlxtnLoadThumbnailTask::DoCancel();
+
+ if ( EStateFetchingUri == iState )
+ {
+ Client().CancelFetchUri( ItemId() );
+ }
+
+ if ( iUtility )
+ {
+ iUtility->Cancel();
+ }
+
+ iFileUtility.ClearBadFileMarker();
+ }
+
+// -----------------------------------------------------------------------------
+// DoRunL
+// -----------------------------------------------------------------------------
+//
+TBool CGlxtnQuickThumbnailTask::DoRunL(TRequestStatus& aStatus)
+ {
+ TRACER("TBool CGlxtnQuickThumbnailTask::DoRunL()");
+ TInt error = aStatus.Int();
+ TBool active = EFalse;
+
+ if ( KErrNone == error )
+ {
+ switch ( iState )
+ {
+ case EStateFetchingUri:
+ User::LeaveIfNull(iInfo);
+ iBadFileMarkerNotNeededFlag = ETrue;
+
+ TBool protectedFile;
+ iInfo->IdentifyFileL(iVideo, protectedFile);
+
+ // leave if file is DRM protected and client has no DRM
+ // capablity
+ if ( protectedFile && !iDrmAllowed )
+ {
+ User::Leave(KErrAccessDenied);
+ }
+
+ if ( !LoadThumbnailL( aStatus ) )
+ {
+ iBadFileMarkerNotNeededFlag = EFalse;
+ iFileUtility.CheckBadFileListL( iInfo->FilePath() );
+ QuickDecodeL(aStatus);
+ }
+ active = ETrue;
+ break;
+
+ case EStateLoading:
+ iQuality = EGlxThumbnailQualityHigh;
+ active = HandleLoadedThumbnailL(aStatus);
+ break;
+
+ case EStateDecodingThumbnail:
+ // Nothing to do
+ break;
+
+ case EStateDecodingImage:
+ QuickScaleL();
+ break;
+
+ default:
+ GLX_ASSERT_ALWAYS( EFalse, Panic( EGlxPanicIllegalState ),
+ "CGlxtnQuickThumbnailTask: Illegal state" );
+ break;
+ }
+ }
+ else
+ {
+ if ( EStateLoading == iState )
+ {
+ // Loading failed - generate low quality thumbnail instead
+ iBadFileMarkerNotNeededFlag = EFalse;
+ iFileUtility.CheckBadFileListL( iInfo->FilePath() );
+ QuickDecodeL(aStatus);
+ active = ETrue;
+ }
+ }
+
+ if ( !active )
+ {
+ if ( !iBadFileMarkerNotNeededFlag )
+ {
+ iFileUtility.ClearBadFileMarker();
+ }
+ Client().ThumbnailFetchComplete(ItemId(), iQuality, error);
+ }
+
+ return active;
+ }
+
+// -----------------------------------------------------------------------------
+// DoRunError
+// -----------------------------------------------------------------------------
+//
+TBool CGlxtnQuickThumbnailTask::DoRunError(TInt aError)
+ {
+ TRACER("TBool CGlxtnQuickThumbnailTask::DoRunError(TInt aError)");
+ iFileUtility.ClearBadFileMarker();
+ Client().ThumbnailFetchComplete(ItemId(), iQuality, aError);
+
+ return EFalse;
+ }
+
+// -----------------------------------------------------------------------------
+// QuickDecodeL
+// -----------------------------------------------------------------------------
+//
+void CGlxtnQuickThumbnailTask::QuickDecodeL(TRequestStatus& aStatus)
+ {
+ TRACER("void CGlxtnQuickThumbnailTask::QuickDecodeL(TRequestStatus& aStatus)");
+ iQuality = EGlxThumbnailQualityLow;
+
+ if ( iVideo )
+ {
+ RArray<TSize> targetSizes;
+ CleanupClosePushL(targetSizes);
+ targetSizes.AppendL( TSize(iRequestedSize) );
+ iUtility = new (ELeave) CGlxtnVideoUtility;
+ iUtility->GetVideoFrameL(&aStatus, iVideoFrame, iInfo->FilePath(), targetSizes, iThumbnail->DisplayMode() );
+ iState = EStateDecodingImage;
+ CleanupStack::PopAndDestroy(&targetSizes);
+ }
+ else
+ {
+ ReadThumbnailL(aStatus);
+ }
+ }
+
+// -----------------------------------------------------------------------------
+// ReadThumbnailL
+// -----------------------------------------------------------------------------
+//
+void CGlxtnQuickThumbnailTask::ReadThumbnailL(TRequestStatus& aStatus)
+ {
+ TRACER("void CGlxtnQuickThumbnailTask::ReadThumbnailL(TRequestStatus& aStatus)");
+ TBool scaleBitmap = ETrue;
+
+ TRAPD(error, ReadExifThumbnailL());
+ if ( KErrNotFound == error || KErrCorrupt == error
+ || KErrNotSupported == error )
+ {
+ GLX_DEBUG2("CGlxtnQuickThumbnailTask::ReadThumbnailL() EXIF error(%d)", error);
+ // Use CImageDecoder to get the EXIF thumbnail instead
+ iDecoder = GlxtnImageDecoderFactory::NewL(
+ iFileUtility.FsSession(), iInfo->FilePath() );
+
+ TRAPD( error2, iDecoder->SetImageTypeL(
+ CImageDecoder::EImageTypeThumbnail ) );
+ if ( KErrNotFound == error2 )
+ {
+ // No EXIF thumbnail - load whole image and scale quickly
+ scaleBitmap = ETrue;
+ }
+ else
+ {
+ User::LeaveIfError( error2 );
+ }
+ }
+ else
+ {
+ User::LeaveIfError(error);
+ GLX_DEBUG1("CGlxtnQuickThumbnailTask::ReadThumbnailL() EXIF TN Found");
+ iDecoder = GlxtnImageDecoderFactory::NewL(
+ iFileUtility.FsSession(), *iThumbData );
+ }
+
+ DecodeThumbnailL(aStatus, scaleBitmap);
+ }
+
+// -----------------------------------------------------------------------------
+// ReadExifThumbnailL
+// -----------------------------------------------------------------------------
+//
+void CGlxtnQuickThumbnailTask::ReadExifThumbnailL()
+ {
+ TRACER("void CGlxtnQuickThumbnailTask::ReadExifThumbnailL()");
+ __ASSERT_ALWAYS(iInfo, Panic(EGlxPanicNullPointer));
+
+ RFile file;
+ CleanupClosePushL(file);
+ User::LeaveIfError(file.Open(iFileUtility.FsSession(),
+ iInfo->FilePath(), EFileRead));
+ TInt size;
+ User::LeaveIfError(file.Size(size));
+ if ( KGlxMaxExifSize < size )
+ {
+ size = KGlxMaxExifSize;
+ }
+
+ HBufC8* exifData = HBufC8::NewLC(size);
+ TPtr8 ptr(exifData->Des());
+ User::LeaveIfError(file.Read(ptr));
+
+ CExifRead* exifReader = CExifRead::NewL(*exifData, CExifRead::ENoJpeg);
+ CleanupStack::PushL(exifReader);
+ delete iThumbData;
+ iThumbData = NULL;
+ iThumbData = exifReader->GetThumbnailL();
+
+ CleanupStack::PopAndDestroy(exifReader);
+ CleanupStack::PopAndDestroy(exifData);
+ CleanupStack::PopAndDestroy(&file);
+ }
+
+// -----------------------------------------------------------------------------
+// QuickScaleL
+// -----------------------------------------------------------------------------
+//
+void CGlxtnQuickThumbnailTask::QuickScaleL()
+ {
+ TRACER("void CGlxtnQuickThumbnailTask::QuickScaleL()");
+ User::LeaveIfNull(iVideoFrame);
+
+ TSize frameSize(iVideoFrame->SizeInPixels());
+ TSize thumbSize(iRequestedSize);
+
+ // Reduce target thumbSize to same aspect ratio as source image
+ if ( thumbSize.iHeight * frameSize.iWidth < thumbSize.iWidth * frameSize.iHeight )
+ {
+ // Source has taller aspect than target so reduce target width
+ thumbSize.iWidth = (thumbSize.iHeight * frameSize.iWidth) / frameSize.iHeight;
+ }
+ else
+ {
+ // Source has wider aspect than target so reduce target height
+ thumbSize.iHeight = (thumbSize.iWidth * frameSize.iHeight) / frameSize.iWidth;
+ }
+
+ // Resize empty bitmap to required size
+ User::LeaveIfError( iThumbnail->Resize( thumbSize ) );
+
+ CFbsBitmapDevice* device = CFbsBitmapDevice::NewL( iThumbnail );
+ CleanupStack::PushL(device);
+ CFbsBitGc* context = NULL;
+ User::LeaveIfError(device->CreateContext(context));
+ CleanupStack::PushL(context);
+
+ context->DrawBitmap(TRect(thumbSize), iVideoFrame);
+
+ CleanupStack::PopAndDestroy(context);
+ CleanupStack::PopAndDestroy(device);
+ }