--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mtpdataproviders/mtpimagedp/src/cmtpimagedpthumbnailcreator.cpp	Tue Feb 02 01:11:40 2010 +0200
@@ -0,0 +1,340 @@
+// Copyright (c) 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:
+//
+
+/**
+ @file
+ @internalTechnology
+*/
+
+#include <e32base.h>
+#include <e32property.h>
+#include <fbs.h>
+#include <caf/content.h>
+#include <icl/imagedata.h>
+#include <sysutil.h>
+#include <pathinfo.h> // PathInfo
+#include <bautils.h> // FileExists
+#include <mtp/cmtptypeopaquedata.h>
+#include "cmtpimagedpthumbnailcreator.h"
+#include "mtpimagedpconst.h"
+#include "mtpimagedputilits.h"
+
+__FLOG_STMT(_LIT8(KComponent,"CMTPImageDpThumbnailCreator");)
+// --------------------------------------------------------------------------
+// CMTPImageDpThumbnailCreator::NewL
+// 2-phased constructor.
+// --------------------------------------------------------------------------
+//
+CMTPImageDpThumbnailCreator* CMTPImageDpThumbnailCreator::NewL()
+    {
+    CMTPImageDpThumbnailCreator* self= new (ELeave) CMTPImageDpThumbnailCreator();
+    CleanupStack::PushL(self);
+    self->ConstructL();
+    CleanupStack::Pop(self);
+    return self;
+    }
+ 
+// --------------------------------------------------------------------------
+// CMTPImageDpThumbnailCreator::~CMTPImageDpThumbnailCreator
+// C++ destructor.
+// --------------------------------------------------------------------------
+//    
+CMTPImageDpThumbnailCreator::~CMTPImageDpThumbnailCreator()
+    {
+    __FLOG(_L8(">> ~CMTPImageDpThumbnailCreator"));
+    Cancel();
+    if(EGetting == iState)
+        {
+        iThumbMgr->CancelRequest(iCurrentReq);
+        }
+    delete iData;
+    delete iImgEnc;
+#ifdef MTPTHUMBSCALING
+    delete iScaler;
+#endif
+    delete iBitmap;  
+    delete iObjectSource;
+    delete iThumbMgr;
+    if(iActiveSchedulerWait->IsStarted())
+        {
+        *iCreationErr = KErrNotReady;
+        iActiveSchedulerWait->AsyncStop();
+        }
+    delete iActiveSchedulerWait;
+    __FLOG(_L8("<< ~CMTPImageDpThumbnailCreator"));
+    __FLOG_CLOSE;
+    }
+ 
+// --------------------------------------------------------------------------
+// CMTPImageDpThumbnailCreator::CMTPImageDpThumbnailCreator
+// C++ constructor.
+// --------------------------------------------------------------------------
+//    
+CMTPImageDpThumbnailCreator::CMTPImageDpThumbnailCreator(): 
+CActive(EPriorityStandard)
+    {
+    __FLOG_OPEN(KMTPSubsystem, KComponent);
+    __FLOG(_L8("CMTPImageDpThumbnailCreator::CMTPImageDpThumbnailCreator(), begin"));
+    CActiveScheduler::Add(this);  
+    __FLOG(_L8("CMTPImageDpThumbnailCreator::CMTPImageDpThumbnailCreator(), end"));
+    }
+
+// --------------------------------------------------------------------------
+// CMTPImageDpThumbnailCreator::ConstructL
+// 2nd phase constructor.
+// --------------------------------------------------------------------------
+//
+void CMTPImageDpThumbnailCreator::ConstructL()
+    {
+    __FLOG(_L8("CMTPImageDpThumbnailCreator::ConstructL(), begin"));
+    iThumbMgr = CThumbnailManager::NewL( *this ); 
+    iThumbMgr->SetThumbnailSizeL( EFullScreenThumbnailSize );
+#ifdef MTPTHUMBSCALING
+    iScaler = CBitmapScaler::NewL();
+#endif    
+    iActiveSchedulerWait = new (ELeave) CActiveSchedulerWait();
+    __FLOG(_L8("CMTPImageDpThumbnailCreator::ConstructL(), end"));
+    }
+
+// --------------------------------------------------------------------------
+// CMTPImageDpThumbnailCreator::DoCancel
+// From CActive.
+// --------------------------------------------------------------------------
+//
+void CMTPImageDpThumbnailCreator::DoCancel()
+    {
+    __FLOG_VA((_L8(">> CMTPImageDpThumbnailCreator::DoCancel() iState %d iStatus 0x%X"), iState, iStatus.Int()));
+    switch(iState)
+        {
+#ifdef MTPTHUMBSCALING
+        case EScaling:
+            iScaler->Cancel();
+            break;
+#endif
+        case EEncoding:
+            iImgEnc->Cancel();
+            break;
+        default:
+            break;
+        }
+    if(iActiveSchedulerWait->IsStarted())
+        {
+        *iCreationErr = KErrCancel;
+        iActiveSchedulerWait->AsyncStop();
+        }
+    // we will not continue creating thumbs.
+    __FLOG_VA((_L8("<< CMTPImageDpThumbnailCreator::DoCancel() iState %d"), iState));
+    }
+
+// --------------------------------------------------------------------------
+// CMTPImageDpThumbnailCreator::RunL
+// From CActive.
+// --------------------------------------------------------------------------
+//    
+void CMTPImageDpThumbnailCreator::RunL()
+    {
+    __FLOG_VA((_L8(">> CMTPImageDpThumbnailCreator::RunL() iState %d iStatus %d"), iState, iStatus.Int()));
+    User::LeaveIfError(iStatus.Int());
+    switch (iState)
+        { 
+#ifdef MTPTHUMBSCALING
+        case EGetted:
+            {
+            ScaleBitmap();
+            iState = EScaling;
+            break;
+            }
+#endif
+        case EScaling:
+            {
+            EncodeImageL( );
+            iState=EEncoding;
+            break;
+            }
+        case EEncoding:
+            {
+            iState=EIdle;
+            if (iThumbMgr->Flags() == CThumbnailManager::EDoNotCreate)
+                {
+                __FLOG_VA((_L8("CMTPImageDpThumbnailCreator::RunL(),EDoNotCreate; iState %d"), iState));
+                delete iData;
+                iData = HBufC8::NewL(1);
+                iBuffer->Write(*iData);
+                }
+            else{
+                iBuffer->Write(*iData);
+                }
+            
+            __FLOG_VA((_L8("<< CMTPImageDpThumbnailCreator::RunL(),iBuffer->Write(*iData); iState %d"), iState));
+            if(iActiveSchedulerWait->IsStarted())
+                {
+                iActiveSchedulerWait->AsyncStop();
+                }
+            break;
+            }
+        default:
+            {
+            User::Leave(KErrGeneral);
+            break;
+            }
+        }
+    __FLOG_VA((_L8("<< CMTPImageDpThumbnailCreator::RunL() iState %d"), iState));
+    }
+
+// --------------------------------------------------------------------------
+// RunError
+// --------------------------------------------------------------------------
+//    
+TInt CMTPImageDpThumbnailCreator::RunError(TInt aErr)
+    {
+    __FLOG_VA((_L8(">> CMTPImageDpThumbnailCreator::RunError() err 0x%X"), aErr));
+    iState=EIdle;
+    if(iActiveSchedulerWait->IsStarted())
+        {
+        *iCreationErr = aErr;
+        iActiveSchedulerWait->AsyncStop();
+        }
+    // no need to cancel iScalerP since only leave is issued if scaler creation fails
+    __FLOG(_L8("<< CMTPImageDpThumbnailCreator::RunError()"));
+    return KErrNone;
+    }
+
+// --------------------------------------------------------------------------
+// 
+// --------------------------------------------------------------------------
+//
+void CMTPImageDpThumbnailCreator::GetThumbnailL(const TDesC& aFileName, CMTPTypeOpaqueData& aThumbName,  TInt& result)
+    {
+    __FLOG(_L8(">> CMtpImageDphumbnailCreator::GetThumbnailL()"));
+    iBuffer = &aThumbName;
+    GetThumbL(aFileName);
+    iCreationErr = &result;		//reset the err flag
+    *iCreationErr = KErrNone;
+    __FLOG(_L8("<< CMTPImageDpThumbnailCreator::CreateThumbnailL()"));
+    iActiveSchedulerWait->Start();
+    }
+
+// --------------------------------------------------------------------------
+// 
+// --------------------------------------------------------------------------
+//
+void CMTPImageDpThumbnailCreator::ClearThumbnailData()
+    {
+    delete iData;
+    iData = NULL;
+    delete iBitmap;
+    iBitmap = NULL;
+    delete iObjectSource;
+    iObjectSource = NULL;
+    delete iImgEnc;
+    iImgEnc = NULL;
+    }
+
+void CMTPImageDpThumbnailCreator::GetThumbL(const TDesC& aFileName)
+    {
+    __FLOG(_L8(">> CMtpImageDphumbnailCreator::GetThumbL()"));
+    // Create an object source representing a path to a file on local
+    // file system.
+    delete iObjectSource;
+    iObjectSource = NULL;
+    
+    iObjectSource = CThumbnailObjectSource::NewL(aFileName, KJpegMimeType);
+    iCurrentReq = iThumbMgr->GetThumbnailL( *iObjectSource );
+    iState = EGetting;
+    __FLOG(_L8("<< CMtpImageDphumbnailCreator::GetThumbL()"));
+    }
+
+#ifdef MTPTHUMBSCALING
+// --------------------------------------------------------------------------
+// CMTPImageDpThumbnailCreator::ScaleBitmapL
+// Scales the bitmap to the thumbnail size.
+// --------------------------------------------------------------------------
+//
+void CMTPImageDpThumbnailCreator::ScaleBitmap()
+    {
+    __FLOG(_L8("CMTPImageDpThumbnailCreator::ScaleBitmapL(), begin"));
+    TSize size( KThumbWidht, KThumbHeigth ); // size 160x120      
+    // Resize image to thumbnail size 
+    iScaler->Scale( &iStatus, *iBitmap, size );
+    SetActive();
+    __FLOG(_L8("CMTPImageDpThumbnailCreator::ScaleBitmapL(), end"));
+    }
+#endif
+
+// --------------------------------------------------------------------------
+// CMTPImageDpThumbnailCreator::EncodeImageL
+// Encodes bitmap as a jpeg image.
+// --------------------------------------------------------------------------
+//
+void CMTPImageDpThumbnailCreator::EncodeImageL( )
+    {
+    __FLOG(_L8(">> CMTPImageDpThumbnailCreator::EncodeImageL()"));
+
+    delete iData;
+    iData = NULL;
+    
+    delete iImgEnc;
+    iImgEnc = NULL;
+    
+    // Convert bitmap to jpg
+    iImgEnc = CImageEncoder::DataNewL( iData, KPtpMimeJPEG, CImageEncoder::EPreferFastEncode );
+    iImgEnc->Convert( &iStatus, *iBitmap );
+    SetActive();
+    __FLOG(_L8("<< CMTPImageDpThumbnailCreator::EncodeImageL()"));
+    }
+
+//
+//
+void CMTPImageDpThumbnailCreator::ThumbnailReady( TInt aError, MThumbnailData& aThumbnail, TThumbnailRequestId aId )
+    {
+    // This function must not leave.
+    __FLOG(_L8(">> CMTPImageDpThumbnailCreator::ThumbnailReady()"));
+    if(iCurrentReq != aId)
+        {
+        __FLOG(_L8("CMTPImageDpThumbnailCreator::ThumbnailReady(),iCurrentReq != aId"));
+        return;
+        }
+    if (aError == KErrNone)
+        {
+        TRAP_IGNORE(iThumbMgr->SetFlagsL(CThumbnailManager::EDefaultFlags));
+        delete iBitmap;   
+        // Claim ownership of the bitmap instance for later use
+        iBitmap = aThumbnail.DetachBitmap();
+#ifdef MTPTHUMBSCALING
+        iState = EGetted;
+#else
+        iState = EScaling;				//direct set to Scaling state jump the scaling function
+#endif
+        }
+    else if ((iThumbMgr->Flags() == CThumbnailManager::EDoNotCreate) && (aError == KErrNotFound))
+        {
+        __FLOG(_L8("CMTPImageDpThumbnailCreator::ThumbnailReady(),EDoNotCreate, KErrNotFound"));
+        iState = EEncoding;
+        iThumbMgr->CreateThumbnails(*iObjectSource);
+        aError = KErrNone;
+        }
+    iStatus=KRequestPending;
+    TRequestStatus* status=&iStatus;
+    User::RequestComplete(status, aError);
+    SetActive();
+    __FLOG(_L8("<< CMTPImageDpThumbnailCreator::ThumbnailReady()"));
+    }
+
+void CMTPImageDpThumbnailCreator::ThumbnailPreviewReady( MThumbnailData& /*aThumbnail*/, TThumbnailRequestId /*aId*/ )
+    {
+    
+    }
+
+// End of file