imagehandlingutilities/thumbnailmanager/plugins/audio/src/thumbnailaudioprovider.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 26 Jan 2010 15:18:05 +0200
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/*
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* Copyright (c) 2006-2007 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 "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:  Audio thumbnail provider plugin
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 *
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*/
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#include <ecom/ecom.h>
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#include <implementationproxy.h>
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#include "thumbnailaudioprovider.h"
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#include "thumbnailimagedecoderv3.h"
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#include "thumbnailmanageruids.hrh"
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#include "thumbnaillog.h"
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#include <metadatautility.h>
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#include <metadatafieldcontainer.h>
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#include "thumbnailmanagerconstants.h"
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#ifndef IMPLEMENTATION_PROXY_ENTRY
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typedef TAny* TProxyNewLPtr;
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#define IMPLEMENTATION_PROXY_ENTRY(aUid, aFuncPtr) \
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{ {aUid}, static_cast<TProxyNewLPtr>(aFuncPtr) }
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#endif 
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// ======== MEMBER FUNCTIONS ========
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// ---------------------------------------------------------------------------
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// CThumbnailImageProvider::NewL()
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// Two-phased constructor.
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// ---------------------------------------------------------------------------
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//
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CThumbnailAudioProvider* CThumbnailAudioProvider::NewL()
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    {
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    CThumbnailAudioProvider* self = new( ELeave )CThumbnailAudioProvider();
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    return self;
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    }
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// ---------------------------------------------------------------------------
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// CThumbnailAudioProvider::CThumbnailAudioProvider()
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// C++ default constructor can NOT contain any code, that might leave.
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// ---------------------------------------------------------------------------
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//
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CThumbnailAudioProvider::CThumbnailAudioProvider()
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    {
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    TN_DEBUG1( "CThumbnailAudioProvider::CThumbnailAudioProvider()" );
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    }
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// ---------------------------------------------------------------------------
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// CThumbnailAudioProvider::~CThumbnailAudioProvider()
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// Destructor.
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// ---------------------------------------------------------------------------
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//
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CThumbnailAudioProvider::~CThumbnailAudioProvider()
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    {
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    TN_DEBUG1( "CThumbnailAudioProvider::~CThumbnailAudioProvider()" );
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    delete iImageDecoderv3;
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    REComSession::DestroyedImplementation( iDtor_ID_Key );
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    }
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// ---------------------------------------------------------------------------
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// CThumbnailAudioProvider::GetThumbnailL()
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// Provides the thumbnail image
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// ---------------------------------------------------------------------------
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//
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void CThumbnailAudioProvider::GetThumbnailL( RFs& aFs, RFile64& aFile, const
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    TDataType& aMimeType  , const CThumbnailManager::TThumbnailFlags aFlags,
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    const TDisplayMode /*aDisplayMode*/, const CThumbnailManager::TThumbnailQualityPreference /*aQualityPreference*/  )
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    {   
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    CMetaDataUtility* metaDataUtil = CMetaDataUtility::NewL();
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    CleanupStack::PushL( metaDataUtil );
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    RArray<TMetaDataFieldId> wantedFields;
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    CleanupClosePushL(wantedFields);
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    wantedFields.AppendL(EMetaDataJpeg);
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    metaDataUtil->OpenFileL(aFile, wantedFields, aMimeType.Des8());
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    const CMetaDataFieldContainer& metaCont = metaDataUtil->MetaDataFieldsL();
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    TPtrC8 ptr = metaCont.Field8( EMetaDataJpeg );
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    HBufC8* data = ptr.AllocL();
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    CleanupStack::PushL( data );
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    if(data->Length() == 0)
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      {
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      User::Leave( KErrNotFound );            
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      }
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    CleanupStack::Pop( data );
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    CleanupStack::PopAndDestroy(&wantedFields);
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    CleanupStack::PopAndDestroy(metaDataUtil);
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    if ( !iImageDecoderv3 )
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        {
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        iImageDecoderv3 = new( ELeave )CThumbnailImageDecoderv3( aFs );
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        }
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    iMimeType = TDataType(KJpegMime);
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    iFlags = aFlags;
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	//set default mode displaymode from global constants
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    iDisplayMode = KStoreDisplayMode;
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    iImageDecoderv3->CreateL( data, *iObserver, iFlags, iMimeType, iTargetSize );
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    iOriginalSize = iImageDecoderv3->OriginalSize();
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    iImageDecoderv3->DecodeL( iDisplayMode );
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    }
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// ---------------------------------------------------------------------------
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// CThumbnailAudioProvider::GetThumbnailL()
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// Provides the thumbnail image
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// ---------------------------------------------------------------------------
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//
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void CThumbnailAudioProvider::GetThumbnailL( RFs& /* aFs */, TDesC8* /* aBuffer */, const
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    TDataType& /*aMimeType */, const CThumbnailManager::TThumbnailFlags /* aFlags */,
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    const TDisplayMode /* aDisplayMode */, const CThumbnailManager::TThumbnailQualityPreference /*aQualityPreference*/ )
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    {
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    }
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// ---------------------------------------------------------------------------
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// CThumbnailAudioProvider::GetThumbnailL()
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// Provides the thumbnail image
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// ---------------------------------------------------------------------------
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//
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void CThumbnailAudioProvider::GetThumbnailL( RFs& /* aFs */, TDesC8& /*aBuffer */)
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    {
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    }
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// ---------------------------------------------------------------------------
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// Cancel thumbnail request
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// ---------------------------------------------------------------------------
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//
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void CThumbnailAudioProvider::CancelGetThumbnail()
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    {
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    if ( iImageDecoderv3)
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        {
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        iImageDecoderv3->Cancel();
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        }
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    }
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// ======== GLOBAL FUNCTIONS ========
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// -----------------------------------------------------------------------------
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// ImplementationTable
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// Define the interface UIDs
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// -----------------------------------------------------------------------------
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//
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const TImplementationProxy ImplementationTable[] = 
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    {
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    IMPLEMENTATION_PROXY_ENTRY( THUMBNAIL_AUDIO_PROVIDER_IMP_UID,
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        CThumbnailAudioProvider::NewL )
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};
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// -----------------------------------------------------------------------------
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// ImplementationGroupProxy
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// The one and only exported function that is the ECom entry point
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// -----------------------------------------------------------------------------
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//
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EXPORT_C const TImplementationProxy* ImplementationGroupProxy( TInt&
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    aTableCount )
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    {
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    aTableCount = sizeof( ImplementationTable ) / sizeof( TImplementationProxy );
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    return ImplementationTable;
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    }
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//End of file