/*

* Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "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:    Thumbnail generation implementation*

*/

#ifndef CIPTVTHUMBNAILIMPL_H

#define CIPTVTHUMBNAILIMPL_H

#include <TNEVideoClipInfo.h>

#include <f32file.h>

#include "CIptvThumbnailGenerator.h"

#include "MIptvRtpTo3gpObserver.h"

class CImageEncoder;

class CFbsBitmap;

class CIptvRtpTo3gpConverter;

/**

 * Thumbnail generation implementation using VideoEditorEngine

 * or S60 Thumbnail Engine.

 *

 * @lib IptvUtil.lib

 * @since Video Center 1.0

 */

class CIptvThumbnailImpl : public CIptvThumbnailGenerator,

                           public MIptvRtpTo3gpObserver,

                           public MTNEVideoClipInfoObserver,

                           public MTNEVideoClipThumbObserver

    {

public:

    /**

     * Two-phased constructor.

     *

     * @param aObserver

     * @param aPriority

     */

    static CIptvThumbnailImpl* NewLC( MIptvThumbnailObserver& aObserver, TInt aPriority );

    /**

     * Destructor.

     */     

    virtual ~CIptvThumbnailImpl();

    /**

     * Request thumbnail generation.

     *

     * @param aClipFilename

     * @param aThumbFilename

     * @param aResolution

     */     

    void GenerateThumbnailL( const TDesC& aClipFilename, const TDesC& aThumbFilename, const TSize aResolution );

    /**

     * Cancel ongoing thumbnail generation.

     */     

    void CancelThumbnail();

private:

    /**

     * Default C++ construct

     *

     * @param aObserver

     * @param aPriority

     */

    CIptvThumbnailImpl( MIptvThumbnailObserver& aObserver, TInt aPriority );

    /**

     * 2nd phase constructor

     */

    void ConstructL();

    /**

     * from MIptvRtpTo3gpObserver

     *

     * @param aConverter

     * @param aError

     */

    void RtpTo3gpConversionReady( CIptvRtpTo3gpConverter& aConverter, TInt aError );

    /**

     * From MTNEVideoClipInfoObserver

     *

     * @param aInfo

     * @param aError

     */     

    void NotifyVideoClipInfoReady( CTNEVideoClipInfo& aInfo, TInt aError );

    /**

     * From MTNEVideoClipThumbObserver

     *

     * @param aInfo

     * @param aError

     * @param aThumbBitmap

     */     

    void NotifyVideoClipThumbCompleted( CTNEVideoClipInfo& aInfo, TInt aError, CFbsBitmap* aThumbBitmap );

    /**

     * From CActive, image encoding is ready

     */

    void RunL();

    /**

     * From CActive, cancel image encoding

     */

    void DoCancel();

    /**

     * Cleanup results from previous generations

     */     

    void DoCleanup();

    /**

     * Start actual thumbnail generation

     *

     * @param aClipFilename

     */     

    void DoStartThumbnailL( const TDesC& aClipFilename );

private:

    /**

     * Observer for generation completed notifications.

     */     

    MIptvThumbnailObserver& iObserver;

    /**

     * Priority for actual thumbnail generation.

     */     

    TInt iPriority;

    /**

     * File system handle.

     */     

    RFs iFs;

    /**

     * Cache for thumbnail filename.

     * Own.

     */     

    HBufC* iThumbFilename;

    /**

     * Cache for thumbnail resolution.

     */     

    TSize iResolution;

    /**

     * Memory bitmap to .jpg image encoder.

     * Own.

     */     

    CImageEncoder* iImageEncoder;

    /**

     * Memory bitmap.

     * Own.

     */     

    CFbsBitmap* iThumbBitmap;

    /**

     * .rtp to .3gp file converter.

     * Own.

     */     

    CIptvRtpTo3gpConverter* iRtpConverter;

    /**

     * File name for temporary .3gp clip used in .rtp generation.

     */

    TFileName iTempClipFilename;

    /**

     * Cache for clip info (underlying generator)

     * Own.     

     */     

    CTNEVideoClipInfo* iClipInfo;

    };

#endif // CIPTVTHUMBNAILIMPL_H