videofeeds/utils/inc/CIptvThumbnailImpl.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Fri, 12 Mar 2010 15:43:00 +0200
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/*
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* Copyright (c) 2006-2009 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:    Thumbnail generation implementation*
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*/
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#ifndef CIPTVTHUMBNAILIMPL_H
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#define CIPTVTHUMBNAILIMPL_H
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#include <TNEVideoClipInfo.h>
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#include <f32file.h>
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#include "CIptvThumbnailGenerator.h"
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#include "MIptvRtpTo3gpObserver.h"
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class CImageEncoder;
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class CFbsBitmap;
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class CIptvRtpTo3gpConverter;
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/**
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 * Thumbnail generation implementation using VideoEditorEngine
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 * or S60 Thumbnail Engine.
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 *
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 * @lib IptvUtil.lib
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 * @since Video Center 1.0
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 */
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class CIptvThumbnailImpl : public CIptvThumbnailGenerator,
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                           public MIptvRtpTo3gpObserver,
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                           public MTNEVideoClipInfoObserver,
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                           public MTNEVideoClipThumbObserver
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    {
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public:
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    /**
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     * Two-phased constructor.
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     *
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     * @param aObserver
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     * @param aPriority
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     */
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    static CIptvThumbnailImpl* NewLC( MIptvThumbnailObserver& aObserver, TInt aPriority );
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    /**
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     * Destructor.
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     */     
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    virtual ~CIptvThumbnailImpl();
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    /**
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     * Request thumbnail generation.
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     *
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     * @param aClipFilename
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     * @param aThumbFilename
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     * @param aResolution
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     */     
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    void GenerateThumbnailL( const TDesC& aClipFilename, const TDesC& aThumbFilename, const TSize aResolution );
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    /**
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     * Cancel ongoing thumbnail generation.
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     */     
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    void CancelThumbnail();
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private:
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    /**
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     * Default C++ construct
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     *
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     * @param aObserver
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     * @param aPriority
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     */
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    CIptvThumbnailImpl( MIptvThumbnailObserver& aObserver, TInt aPriority );
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    /**
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     * 2nd phase constructor
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     */
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    void ConstructL();
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    /**
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     * from MIptvRtpTo3gpObserver
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     *
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     * @param aConverter
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     * @param aError
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     */
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    void RtpTo3gpConversionReady( CIptvRtpTo3gpConverter& aConverter, TInt aError );
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    /**
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     * From MTNEVideoClipInfoObserver
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     *
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     * @param aInfo
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     * @param aError
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     */     
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    void NotifyVideoClipInfoReady( CTNEVideoClipInfo& aInfo, TInt aError );
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    /**
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     * From MTNEVideoClipThumbObserver
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     *
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     * @param aInfo
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     * @param aError
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     * @param aThumbBitmap
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     */     
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    void NotifyVideoClipThumbCompleted( CTNEVideoClipInfo& aInfo, TInt aError, CFbsBitmap* aThumbBitmap );
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    /**
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     * From CActive, image encoding is ready
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     */
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    void RunL();
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    /**
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     * From CActive, cancel image encoding
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     */
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    void DoCancel();
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    /**
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     * Cleanup results from previous generations
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     */     
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    void DoCleanup();
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    /**
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     * Start actual thumbnail generation
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     *
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     * @param aClipFilename
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     */     
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    void DoStartThumbnailL( const TDesC& aClipFilename );
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private:
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    /**
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     * Observer for generation completed notifications.
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     */     
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    MIptvThumbnailObserver& iObserver;
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    /**
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     * Priority for actual thumbnail generation.
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     */     
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    TInt iPriority;
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    /**
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     * File system handle.
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     */     
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    RFs iFs;
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    /**
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     * Cache for thumbnail filename.
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     * Own.
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     */     
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    HBufC* iThumbFilename;
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    /**
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     * Cache for thumbnail resolution.
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     */     
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    TSize iResolution;
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    /**
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     * Memory bitmap to .jpg image encoder.
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     * Own.
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     */     
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    CImageEncoder* iImageEncoder;
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    /**
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     * Memory bitmap.
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     * Own.
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     */     
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    CFbsBitmap* iThumbBitmap;
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    /**
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     * .rtp to .3gp file converter.
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     * Own.
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     */     
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    CIptvRtpTo3gpConverter* iRtpConverter;
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    /**
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     * File name for temporary .3gp clip used in .rtp generation.
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     */
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    TFileName iTempClipFilename;
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    /**
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     * Cache for clip info (underlying generator)
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     * Own.     
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     */     
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    CTNEVideoClipInfo* iClipInfo;
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    };
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#endif // CIPTVTHUMBNAILIMPL_H