--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/upnpmpxplugins/upnpplaybackplugins/inc/upnpmusicperiodizer.h	Thu Dec 17 08:52:00 2009 +0200
@@ -0,0 +1,171 @@
+/*
+* Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "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:      Periodic timer support resource
+*
+*/
+
+
+
+
+
+
+#ifndef __UPNPMUSICPERIODIZER_H__
+#define __UPNPMUSICPERIODIZER_H__
+
+// INCLUDES
+#include <e32base.h>
+#include "upnpmusicperiodizer.h"
+
+// FORWARD DECLARATIONS
+class MUPnPMusicPeriodizerObserver;
+
+/**
+ * A class that provides periodic notifications.
+ *
+ * Once started, notifies an abstract interface periodically
+ * but only when Continue is called. This avoids situation
+ * where previous operation is still in progress when the next
+ * notification arrives.
+ *
+ * @lib upnpmusicplugins.lib
+ * @since S60 v3.1
+ */
+class CUPnPMusicPeriodizer : public CTimer
+    {
+
+public:
+
+   /**
+    * Static constructor
+    *
+    * @since Series 60 3.1
+    * @param aObserver the party to be notified on timer trigger
+    * @param aTimerWavelength the timer delay in microseconds
+    */
+    static CUPnPMusicPeriodizer* NewL(
+        MUPnPMusicPeriodizerObserver& aObserver,
+        TInt32 aTimerWavelength );
+    
+   /**
+    * Static constructor
+    *
+    * @since Series 60 3.1
+    * @param aObserver the party to be notified on timer trigger
+    * @param aTimerWavelength the timer delay in microseconds
+    */
+    static CUPnPMusicPeriodizer* NewLC(
+        MUPnPMusicPeriodizerObserver& aObserver,
+        TInt32 aTimerWavelength );
+
+    /**
+     * Destructor
+     *
+     * @since Series 60 3.1
+     */ 
+    virtual ~CUPnPMusicPeriodizer();
+
+private:
+
+   /**
+    * Constructor
+    *
+    * @since Series 60 3.1
+    * @param aObserver the party to be notified on timer trigger
+    * @param aTimerWavelength the timer delay in microseconds
+    */
+    CUPnPMusicPeriodizer(
+        MUPnPMusicPeriodizerObserver& aObserver,
+        TInt32 aTimerWavelength );
+
+    /**
+     * 2nd phase constructor
+     *
+     * @since Series 60 3.1
+     */   
+    void ConstructL();
+
+public:
+
+    /**
+     * Starts the periodizer
+     *
+     * @since Series 60 3.1
+     */
+    void Start();
+
+    /**
+     * Continues a next step for the periodizer
+     *
+     * @since Series 60 3.1
+     */
+    void Continue();
+
+    /**
+     * Stops periodizer
+     *
+     * @since Series 60 3.1
+     */
+    void Stop();
+
+protected: // personal method
+
+    /**
+     * Receives the timer triggering
+     *
+     * @since Series 60 3.1
+     */
+    void RunL();
+
+
+private: // data
+
+    /**
+     * Observer of the timer
+     */
+    MUPnPMusicPeriodizerObserver& iObserver;
+
+    /**
+     * Timer wavelength as milliseconds to wait between notifications
+     */
+    TInt32 iTimerWavelength;
+
+    };
+
+/**
+ * The interface to receive timer notifications
+ */
+class MUPnPMusicPeriodizerObserver
+    {
+
+public:
+
+   /**
+    * Timer has triggered
+    *
+    * @since Series 60 3.1
+    */
+    virtual void HandlePeriod() = 0;
+    
+   /**
+    * Timer has triggered
+    *
+    * @since Series 60 3.2.3
+    */
+    virtual void HandlePeriodForEnd(){}
+
+    };
+
+
+#endif // __UPNPMUSICPERIODIZER_H__
+