diff -r 000000000000 -r b8ed18f6c07b devsound/a3fdevsound/src/devsoundadaptor/cdevcommoncontrol.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/devsound/a3fdevsound/src/devsoundadaptor/cdevcommoncontrol.h	Thu Oct 07 22:34:12 2010 +0100
@@ -0,0 +1,88 @@
+/*
+* Copyright (c) 2009 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:
+*
+*/
+
+#ifndef CDEVCOMMONCONTROL_H
+#define CDEVCOMMONCONTROL_H
+
+#include "cdevaudiocontrol.h"
+#include <a3f/a3f_trace_utils.h>
+#include <a3f/maudioprocessingunitobserver.h>
+
+/**
+ * CDevCommonControl
+ *
+ * Common functionality required by:
+ *      CDevPlayControl
+ *      CDevRecordControl
+ *      CDevToneControl
+ *
+ * @lib mmfdevsoundadaptation.lib
+ * @since
+ */
+
+NONSHARABLE_CLASS(CDevCommonControl) :  public CDevAudioControl,  
+                                        public MAudioProcessingUnitObserver
+	{
+public:
+    CDevCommonControl();
+    ~CDevCommonControl();
+    
+    // from CDevAudioControl
+    TInt Stop();
+    TInt Pause();
+    TInt Resume();
+    
+    // from MAudioProcessingUnitObserver
+    void StateEvent(MAudioStream& aStream, TInt aError, TAudioState aNewState);
+    void ProcessingUnitError(MAudioProcessingUnit* aInstance, TInt aError);
+    
+    // from MAudioContextObserver
+    void ContextEvent(TUid aEvent, TInt aError);
+    
+protected:
+    // methods introduced by this class
+    virtual void FinishWithError(TInt aError) = 0;
+    
+private:
+    //  Internal functions which together implement CDevCommonControl::ContextEvent
+    void ContextEventUpdateWithoutStateEventNoError();
+    void ContextEventUpdateWithoutStateEventButWithError(TInt aError);
+    void ContextEventUpdateWithStateEventNoError();
+    void ContextEventStateDevSoundAdaptorLoading(); 
+    void ContextEventStateDevSoundAdaptorUnloading(); 
+    void ContextEventStateDevSoundAdaptorStopping();
+    void ContextEventStateDevSoundAdaptorUninitializing();
+    void ContextEventStateDevSoundAdaptorBeingPreempted();
+    void ContextEventPauseResumeSequenceDueToEmptyBuffers(TBool aFlush);
+    void ContextEventUpdateWithStateEventAndError(TInt aError);
+    void ContextEventUpdateComplete(TInt aError);
+    void ContextEventPreEmption(TUid aEvent, TInt aError);
+    void ContextEventAbort(TInt aError);
+    void ContextEventErrorStateDevSoundAdaptorActivating(TInt aError);
+    void ContextEventErrorStateDevSoundAdaptorBeingPreempted();
+    void ContextEventAsynchronousPlayCompletion(TInt aError);
+    void ContextEventAsynchronousInitializeComplete(TInt aError);
+    void ContextEventStopDevSoundNotifications();
+    
+private:
+    TBool iBeingPreempted;
+    TBool iPreemptionClash;
+	};
+
+#endif // CDEVCOMMONCONTROL_H
+
+// end of file