upnpmpxplugins/upnpplaybackplugins/inc/upnpmusicdownloadproxy.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 17 Dec 2009 08:52:00 +0200
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/*
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* Copyright (c) 2008 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:      Proxy for downloading upnp files and playing locally
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*
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*/
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#ifndef __CUPNPMUSICDOWNLOADPROXY_H__
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#define __CUPNPMUSICDOWNLOADPROXY_H__
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// INCLUDES
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#include <badesca.h>
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#include <mpxplaybackplugin.h>
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#include <mpxplaybackpluginobserver.h>
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#include "upnptrackobserver.h"
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// FORWARD DECLARATIONS
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class CUPnPSingleton;
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class CUPnPTrack;
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class MDesCArray; // for MPX compatibility - actually this is NOT a class
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/**
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 * UPnP Proxy class for Local Player.
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 *
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 * Provides additional UPnP download functionality: first
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 * downloads the file and then uses the underlying plugin to
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 * execute commands (play,stop,pause) on the local copy of the
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 * song
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 *
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 * @lib upnpmusicplugins.lib
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 * @since S60 v3.1
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 */
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class CUPnPMusicDownloadProxy : public CMPXPlaybackPlugin,
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                                public MMPXPlaybackPluginObserver,
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                                public MUPnPTrackObserver
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    {
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private:
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    /**
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     * Defines internal player state
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     *
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     * EStateUninitialised          - Initial and terminal state
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     * EStatePreparing              - Preparatory phases before download
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     * EStateDownloading            - Downloading the temporary file
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     * EStateInitialisingLocally    - Download is complete, starting to
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     *                                initialize proxied local plugin
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     * EStateActive                 - Init complete, now acting as a proxy for
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     *                                the local plugin to play the temp file
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     * @since Series 60 3.1
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     */  
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    enum TProxyState
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        {
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        EStateUninitialised = 0, // initial state
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        EStatePreparing, // preparatory phases
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        EStateDownloading, // download phase
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        EStateInitialisingLocally, // local init
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        EStateActive, // normal
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        EStateClosing // used if error during initialise
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        }; 
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public:
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    /**
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     * Static 1st phase constructor.
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     * 
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     * @since Series 60 3.1
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     * @param aObs reference to call back interface
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     * @return A new player instance
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     */   
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    static CUPnPMusicDownloadProxy* NewL( MMPXPlaybackPluginObserver& aObs );
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    /**
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     * Destructor
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     *
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     * @since Series 60 3.1
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     */ 
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    ~CUPnPMusicDownloadProxy();
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private:
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    /**
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     * Private default constructor
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     *
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     * @since Series 60 3.1
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     * @param aObs reference to call back interface
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     */
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    CUPnPMusicDownloadProxy( MMPXPlaybackPluginObserver& aObs );
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    /**
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     * 2nd phase constructor
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     *
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     * @since Series 60 3.1
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     */   
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    void ConstructL();    
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public: // From CMPXPlaybackPlugin
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    /**
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     * See CMPXPlaybackPlugin
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     */
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    void InitialiseL( const TDesC& aSong );
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    /**
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     * See CMPXPlaybackPlugin
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     */
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    void InitialiseL( RFile& aSong );
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    /**
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     * See CMPXPlaybackPlugin
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     */
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    void CommandL( TMPXPlaybackCommand aCmd, TInt aData );
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    /**
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     * See CMPXPlaybackPlugin
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     */
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    void SetL( TMPXPlaybackProperty aProperty, TInt aValue ); 
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    /**
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     * See CMPXPlaybackPlugin
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     */
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    void ValueL( TMPXPlaybackProperty aProperty ) const;
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    /**
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     * See CMPXPlaybackPlugin
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     */
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    void SubPlayerNamesL();
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    /**
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     * See CMPXPlaybackPlugin
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     */
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    void SelectSubPlayerL(TInt aIndex);
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    /**
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     * See CMPXPlaybackPlugin
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     */
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    const TDesC& SubPlayerName();
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    /**
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     * See CMPXPlaybackPlugin
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     */
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    TInt SubPlayerIndex() const;
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    /**
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     * See CMPXPlaybackPlugin
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     */
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    void MediaL( const TArray<TMPXAttribute>& aAttrs );
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    /**
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     * See CMPXPlaybackPlugin
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     */
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    void CancelRequest();
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    /**
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     * See CMPXPlaybackPlugin
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     */
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    void SetObserver(MMPXPlaybackPluginObserver& aObs);
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protected: // From MMPXPlaybackPluginObserver
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    /**
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     * See MMPXPlaybackPluginObserver
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     */
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    void HandlePluginEvent( TEvent aEvent, TInt aData, TInt aError );
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    /**
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     * see MMPXPlaybackPluginObserver's base class MMPXPlaybackCallback
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     */
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    void HandleProperty( TMPXPlaybackProperty aProperty, TInt aValue,
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                          TInt aError );
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    /**
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     * see MMPXPlaybackPluginObserver's base class MMPXPlaybackCallback
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     */
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    void HandleSubPlayerNames( TUid aPlayer, const MDesCArray* aSubPlayers,
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        TBool aComplete, TInt aError );
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    /**
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     * see MMPXPlaybackPluginObserver's base class MMPXPlaybackCallback
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     */
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    void HandleMedia( const CMPXMedia& aProperties, TInt aError );
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protected: // From MUPnPTrackObserver
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    /**
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     * See MUPnPTrackObserver
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     */
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    void ResolveURIComplete( TInt aError );
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private:
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    /**
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     * cleanup when going in uninitialised state
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     */
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    void Cleanup();
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private: // Data
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    /**
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     * Local plugin instance
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     * Own.
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     */   
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    CMPXPlaybackPlugin*                     iLocalPlayer;
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    /**
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     * The UPnP services singleton
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     * Own.
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     */
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     CUPnPSingleton*                        iSingleton;
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    /**
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     * Player state
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     */
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    mutable TProxyState                     iProxyState;
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    /**
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     * UPnP track
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     * Own.
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     */            
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    CUPnPTrack*                             iTrack;
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    };
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#endif // __CUPNPMUSICDOWNLOADPROXY_H__
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