author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 24 Nov 2009 08:56:33 +0200 | |
changeset 23 | 50974a8b132e |
parent 5 | 989d2f495d90 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2007-2007 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 the License "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: This Class provides the core functionality to thumbnail generation |
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* |
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* |
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*/ |
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#include<e32cmn.h> |
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#include<f32file.h> |
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50974a8b132e
Revision: 200945
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
5
diff
changeset
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#include<apgcli.h> |
50974a8b132e
Revision: 200945
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
5
diff
changeset
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#include<apmrec.h> // For TDataRecognitionResult |
50974a8b132e
Revision: 200945
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
5
diff
changeset
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#include<apmstd.h> |
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#include<thumbnailmanager.h> |
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#include"mgthumbnailgeneration.h" |
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#include"mgmresolution.h" |
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#include"mgthumbobserver.h" |
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_LIT(KImage,"image"); |
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_LIT(KVideo,"video"); |
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_LIT(KThumbFolder,"_PAlbTN_"); |
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const TInt KHeight = 74 ; |
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const TInt KWidth = 104; |
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const TInt KThumbnailPathMaxLen = 255; |
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const TInt KBufLen = 20; |
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const TInt KZero = 0; |
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// ----------------------------------------------------------------------------- |
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// CThumbnailGeneration::NewL |
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// Returns the instance of CThumbnailGeneration class. |
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// ----------------------------------------------------------------------------- |
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CThumbnailGeneration* CThumbnailGeneration::NewL() |
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{ |
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CThumbnailGeneration* self = new(ELeave)CThumbnailGeneration(); |
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CleanupStack::PushL(self); |
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self->ConstructL(); |
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CleanupStack::Pop(self); |
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return self; |
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} |
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// ----------------------------------------------------------------------------- |
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// CThumbnailGeneration::ConstructL |
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// It creates the instance of TNM and Observer |
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// ----------------------------------------------------------------------------- |
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void CThumbnailGeneration::ConstructL() |
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{ |
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// Creating instance of observer class |
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iThumbnailObserver = CThumbnailObserver::NewL(); |
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//Creating instance of ThumbnailManger |
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iThumbnailManager = CThumbnailManager::NewL(*iThumbnailObserver); |
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iThumbnailObserver->SetThumbnailMangager(iThumbnailManager); |
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} |
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// ----------------------------------------------------------------------------- |
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// CThumbnailGeneration::~CThumbnailGeneration |
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// Destructor |
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// ----------------------------------------------------------------------------- |
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CThumbnailGeneration::~CThumbnailGeneration() |
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{ |
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if(iThumbnailObserver) |
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{ |
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delete iThumbnailObserver; |
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} |
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if(iThumbnailManager) |
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{ |
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delete iThumbnailManager; |
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} |
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} |
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// ----------------------------------------------------------------------------- |
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// CThumbnailGeneration::CThumbnailGeneration |
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// C++ Constructor |
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// ----------------------------------------------------------------------------- |
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CThumbnailGeneration::CThumbnailGeneration():iThumbnailObserver(NULL),iThumbnailManager(NULL) |
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{ |
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} |
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// ----------------------------------------------------------------------------- |
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// CThumbnailGeneration::Cancel |
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// Cancels the thumbnail generation request |
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// ----------------------------------------------------------------------------- |
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TInt CThumbnailGeneration::Cancel(TInt32 aTransactionId) |
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{ |
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return iThumbnailObserver->Cancel(aTransactionId); |
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} |
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// ----------------------------------------------------------------------------- |
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// CThumbnailGeneration::GetThumbnailL |
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// This method makes request for thumbnail generation |
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// ----------------------------------------------------------------------------- |
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void CThumbnailGeneration::GetThumbnailL(MThumbnailObserver* aObserver,TInt32 aTransactionID, TDesC& aUrl, TInt aHeight, TInt aWidth) |
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{ |
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// Check whether uri is valid |
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TBuf<KThumbnailPathMaxLen> thumbnailpath; |
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TBuf<KThumbnailPathMaxLen> refDir; |
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// Checking validity of media file name |
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IsUrlValidL( aUrl); |
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// getting thumbnail size |
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TSize thumbsize = GetthumbsizeL(aUrl,aHeight,aWidth); |
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//creating thumbnail path |
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CreateThumbnailPathL(aUrl,thumbsize,refDir,thumbnailpath); |
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// If thumbnail already exists then give a call to users callback |
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if(IsThumbnailExistL(thumbnailpath,refDir)) |
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{ |
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iThumbnailObserver->AddToObserverL(aObserver,aTransactionID,thumbnailpath,KZero); |
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iThumbnailObserver->ThumbnailAlreadyExists(); |
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return ; |
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} |
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iThumbnailManager->SetFlagsL(CThumbnailManager::ECropToAspectRatio); |
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// Setting thumbnail size |
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iThumbnailManager->SetThumbnailSizeL( thumbsize ); |
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// Prefer thumbnails in the highest quality possible disregarding |
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// any negative impact on performance. |
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iThumbnailManager->SetQualityPreferenceL(CThumbnailManager::EOptimizeForQuality ); |
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//setting display mode EColor16M for both video and image it works |
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iThumbnailManager->SetDisplayModeL( EColor16M ); |
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// Create an object source representing a path to a file on local |
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// file system. |
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CThumbnailObjectSource* source = CThumbnailObjectSource::NewLC(aUrl,KNullDesC); |
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// Issue the request using default priority |
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TInt thumbnailRequestId = iThumbnailManager->GetThumbnailL( *source ); |
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CleanupStack::PopAndDestroy(source); |
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// Adding thumbanilrequestinfo to observer |
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iThumbnailObserver->AddToObserverL(aObserver,aTransactionID,thumbnailpath,thumbnailRequestId); |
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} |
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// ----------------------------------------------------------------------------- |
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// CThumbnailGeneration::getthumbsizeL |
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// This method gets the size for thumbnail |
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// ----------------------------------------------------------------------------- |
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TSize CThumbnailGeneration::GetthumbsizeL(TDesC& aUrl,TInt aHeight, TInt aWidth) |
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{ |
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// Creating media resolution object |
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TSize mediaRes(0,0); |
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TSize thumbsize(0,0); |
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MResolution* mediaResObj= GetResolutionobjL(aUrl); |
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CleanupStack::PushL(mediaResObj); |
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// Getting resolution for media file |
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mediaResObj->GetresolutionL(mediaRes); |
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// calculating size for thumbnail |
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thumbsize = CalculateSize(mediaRes,aHeight,aWidth); |
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CleanupStack::Pop(mediaResObj); |
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delete mediaResObj; |
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return thumbsize; |
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} |
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// ----------------------------------------------------------------------------- |
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// CThumbnailGeneration::CalculateSize |
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// This method calculates the size for thumbnail |
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// ----------------------------------------------------------------------------- |
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TSize CThumbnailGeneration::CalculateSize(TSize aRes, TInt aHeight, TInt aWidth) |
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{ |
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TSize thumbnailsize; |
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if(KNegVal == aHeight && KNegVal == aWidth ) |
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{ |
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if( (aRes.iWidth < KWidth) || (aRes.iHeight< KHeight) ) // if the resolution of media file is less than that of plaformspecific |
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{ |
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thumbnailsize.iWidth = aRes.iWidth; |
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thumbnailsize.iHeight =aRes.iHeight; |
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} |
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else // if resolution of video file is greater that platform specific |
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{ |
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thumbnailsize.iWidth = KWidth; |
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thumbnailsize.iHeight = KHeight; |
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} |
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return thumbnailsize; |
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} |
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if(TSize(0,0) == aRes ) |
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{ |
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// If both height and width are not given or either of them are having value than that of platformspecific resolution |
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// then we will use platform specific size |
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if( (aHeight >KZero && (aHeight>KHeight) ) || (aWidth >KZero && (aWidth >KWidth )) ) |
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{ |
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thumbnailsize.iWidth = KWidth; |
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thumbnailsize.iHeight = KHeight; |
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} |
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else if(KNegVal == aWidth ) // if height is given and width not given |
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{ |
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thumbnailsize.iWidth = (TInt)((TReal)(KWidth/KHeight)* aHeight); |
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thumbnailsize.iHeight = aHeight ; |
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} |
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else if(KNegVal == aHeight)// if width is given and height not given |
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{ |
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thumbnailsize.iHeight = (TInt)(((TReal)KHeight/KWidth ) * aWidth) ; |
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thumbnailsize.iWidth = aWidth ; |
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} |
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else // when both are given |
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{ |
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thumbnailsize.iWidth = aWidth; |
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thumbnailsize.iHeight = aHeight; |
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} |
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} |
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else // When we get the resolution of media file |
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{ |
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// If both height and width are not given or either of them are having value greater than that of media file |
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// then we will use platform specific size |
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if( (aHeight >KZero && (aHeight > aRes.iHeight) ) || (aWidth >KZero && (aWidth > aRes.iWidth )) ) |
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{ |
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thumbnailsize.iWidth = aRes.iWidth ; |
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thumbnailsize.iHeight = aRes.iHeight ; |
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} |
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else if(KNegVal == aWidth )// if height is given and width is not given |
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{ |
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thumbnailsize.iWidth = (TInt)((TReal)(aRes.iWidth/aRes.iHeight)* aHeight); |
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thumbnailsize.iHeight = aHeight ; |
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} |
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else if(KNegVal == aHeight)// if width is given and height not given |
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{ |
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thumbnailsize.iHeight = (TInt)(((TReal)aRes.iHeight/aRes.iWidth ) * aWidth) ; |
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thumbnailsize.iWidth = aWidth ; |
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} |
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else // when both are given |
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{ |
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thumbnailsize.iWidth = aWidth; |
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thumbnailsize.iHeight = aHeight; |
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} |
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} |
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return thumbnailsize; |
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} |
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// ----------------------------------------------------------------------------- |
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// CThumbnailGeneration::GetResolutionobj |
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// This method gets the MResolution object |
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// ----------------------------------------------------------------------------- |
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MResolution* CThumbnailGeneration::GetResolutionobjL(TDesC& aUrl) |
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{ |
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RFs fs; |
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TBuf8<KThumbnailPathMaxLen> filebuf; |
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TInt fileSize = KThumbnailPathMaxLen; |
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User::LeaveIfError(fs.Connect()); |
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CleanupClosePushL(fs); |
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User::LeaveIfError(fs.ReadFileSection(aUrl,KZero,filebuf,fileSize)); |
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// Opening RApaLsSession to get mimetype of media file |
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RApaLsSession aPaSession; |
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User::LeaveIfError(aPaSession.Connect()); |
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CleanupClosePushL(aPaSession); |
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TDataRecognitionResult mimeTypeResult; |
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TBuf<KBufLen> media; |
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if(KErrNone == aPaSession.RecognizeData(aUrl,filebuf,*&mimeTypeResult)) |
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{ |
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// If media type is of image then creating image resolution object |
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if(KZero == mimeTypeResult.iDataType.Des().Find(KImage) ) |
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{ |
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media.Append(KImage); |
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} |
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else if(KZero == mimeTypeResult.iDataType.Des().Find(KVideo)) |
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{ |
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media.Append(KVideo); |
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} |
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else |
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{ |
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User::Leave(KErrNotSupported); |
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} |
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} |
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else |
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{ |
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// Need to leave from here |
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User::Leave(KErrNotSupported); |
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} |
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CleanupStack::PopAndDestroy(&aPaSession); // aPaSession |
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CleanupStack::PopAndDestroy(&fs); // fs |
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return MediaResolutionFactory::CreateMediaResolutionobjL(media,aUrl); |
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} |
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// ----------------------------------------------------------------------------- |
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// CThumbnailGeneration::IsThumbnailExist |
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// This method checks if the requested thumbnail already exists |
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// ----------------------------------------------------------------------------- |
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TBool CThumbnailGeneration::IsThumbnailExistL(const TDesC& aThumbpath,const TDesC& aRefDir) |
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{ |
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// Need to check whether thumbnail exists . |
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RFs fs; |
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User::LeaveIfError(fs.Connect()); |
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CleanupClosePushL(fs); |
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RFile file; |
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if(KErrNone == file.Open(fs,aThumbpath,EFileRead)) |
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{ |
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// thumbnail exist so return ETrue |
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file.Close(); |
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CleanupStack::PopAndDestroy(&fs); |
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return ETrue; |
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} |
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// Need to check whether dir panltn exist |
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TInt ret = fs.MkDirAll(aRefDir); |
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if( !(KErrNone == ret || KErrAlreadyExists == ret) ) |
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{ |
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User::Leave(ret); |
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} |
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CleanupStack::PopAndDestroy(&fs); |
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return EFalse; |
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} |
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// ----------------------------------------------------------------------------- |
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// CThumbnailGeneration::IsUrlValid |
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// This method checks the validity of Url |
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// ----------------------------------------------------------------------------- |
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void CThumbnailGeneration::IsUrlValidL(TDesC& aUrl) |
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{ |
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RFs fs; |
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User::LeaveIfError(fs.Connect()); |
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// If the url is not in correct filepath format |
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if(!fs.IsValidName(aUrl)) |
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{ |
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fs.Close(); |
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User::Leave(KErrBadName); |
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} |
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// If file is not present |
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RFile file; |
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if(KErrNone != file.Open(fs,aUrl,EFileRead)) |
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{ |
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file.Close(); |
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fs.Close(); |
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User::Leave(KErrNotFound); |
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} |
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file.Close(); |
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fs.Close(); |
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} |
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// ----------------------------------------------------------------------------- |
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// CThumbnailGeneration::createThumbnailPath |
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// This method creates the thumbnail path |
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// ----------------------------------------------------------------------------- |
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void CThumbnailGeneration::CreateThumbnailPathL(TDesC& aUri, TSize aThumbsize,TDes& aRefDir ,TDes& aThumbnailPath) |
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{ |
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TInt strlength = aUri.Length(); |
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TChar chr('\\'); |
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TInt len = aUri.LocateReverseF(chr); |
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if(KErrNotFound == len) |
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{ |
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User::Leave(KErrBadName); |
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} |
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TBuf<KThumbnailPathMaxLen> refpathbuf; |
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TBuf<KThumbnailPathMaxLen> buf; |
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buf.Append(aUri.Left(len+1)); |
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buf.Append(KThumbFolder); |
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refpathbuf.Append(buf); |
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refpathbuf.Append(_L("\\")); |
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aRefDir.Append(refpathbuf); // setting refdir argument |
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buf.Append(aUri.Right(strlength-len)); |
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buf.Append('_'); |
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buf.AppendNum(aThumbsize.iWidth); |
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buf.Append('x'); |
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buf.AppendNum(aThumbsize.iHeight); |
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aThumbnailPath.Append(buf); |
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return; |
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} |
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