--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mpx/playbackframework/playbackengine/inc/mpxplaybackcommandbuffer.h	Thu Dec 17 08:55:47 2009 +0200
@@ -0,0 +1,109 @@
+/*
+* Copyright (c) 2006 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:  Buffer commands
+*
+*/
+
+
+#ifndef CMPXPLAYBACKCMDBUFFER_H
+#define CMPXPLAYBACKCMDBUFFER_H
+
+
+#include "mpxplaybackcommandbufferobserver.h"
+
+/**
+*  Special processing for media keys, e.g. buffering a quick
+*  succession of keys and calling back with the net result after
+*  a specific period of time
+*/
+NONSHARABLE_CLASS(CMPXPlaybackCmdBuffer) : public CTimer
+    {
+public:
+
+    /**
+    * Two-phased constructor
+    *
+    * @param aObserver observer of the media key
+    * @return object of constructed
+    */
+    static CMPXPlaybackCmdBuffer* NewL(MMPXPlaybackCmdBufferObserver& aObserver);
+
+public:
+    /**
+    *  Is this a command controlled by media keys
+    *
+    *  @param aCmd playback command
+    *  @return ETrue if the command is controlled by media keys
+    */
+    TBool CommandForBuffering(TMPXPlaybackCommand aCmd) const;
+
+    /**
+    *  Buffer a command, along with the current state and position in the
+    *  track
+    *
+    *  @param aCmd play command
+    *  @param aState play state
+    *  @param aPos position
+    */
+    void BufferCommandL(TMPXPlaybackCommand aCmd,TMPXPlaybackState aState,TInt aPos);
+
+    /**
+    *  Called by client when finished processing command
+    */
+    void CompleteCommand();
+
+    /**
+    *  Any command buffered
+    *
+    *  @return ETrue buffered commands available
+    */
+    TBool IsCommandBuffered() const;
+
+    /**
+    *  Clear all command
+    */
+    void ClearCommands();
+
+private:
+    /**
+    *  From CActive
+    *  Handles an active object's request completion event
+    */
+    void RunL();
+
+    /**
+    *  From CActive
+    *  Handles a leave occurring in the request completion event handler RunL()
+    *
+    *  @param aError error code
+    *  @return system error code
+    */
+    TInt RunError(TInt aError);
+
+private:
+
+    /**
+    *  C++ constructor
+    */
+    CMPXPlaybackCmdBuffer(MMPXPlaybackCmdBufferObserver& aObserver);
+
+private:
+    MMPXPlaybackCmdBufferObserver& iObserver;
+    TMPXPlaybackCmdInfo iEvent;
+    TBool iIsCommandBuffered;
+    TBool iEventProcessing;
+    TTimeIntervalMicroSeconds32 iBufferTime;
+};
+
+#endif // CMPXPLAYBACKCMDBUFFER_H