sl@0: /*
sl@0: * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: * All rights reserved.
sl@0: * This component and the accompanying materials are made available
sl@0: * under the terms of "Eclipse Public License v1.0"
sl@0: * which accompanies this distribution, and is available
sl@0: * at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: *
sl@0: * Initial Contributors:
sl@0: * Nokia Corporation - initial contribution.
sl@0: *
sl@0: * Contributors:
sl@0: *
sl@0: * Description:
sl@0: *
sl@0: */
sl@0: 
sl@0: #ifndef CDEVCOMMONCONTROL_H
sl@0: #define CDEVCOMMONCONTROL_H
sl@0: 
sl@0: #include "cdevaudiocontrol.h"
sl@0: #include <a3f/a3f_trace_utils.h>
sl@0: #include <a3f/maudioprocessingunitobserver.h>
sl@0: 
sl@0: /**
sl@0:  * CDevCommonControl
sl@0:  *
sl@0:  * Common functionality required by:
sl@0:  *      CDevPlayControl
sl@0:  *      CDevRecordControl
sl@0:  *      CDevToneControl
sl@0:  *
sl@0:  * @lib mmfdevsoundadaptation.lib
sl@0:  * @since
sl@0:  */
sl@0: 
sl@0: NONSHARABLE_CLASS(CDevCommonControl) :  public CDevAudioControl,  
sl@0:                                         public MAudioProcessingUnitObserver
sl@0: 	{
sl@0: public:
sl@0:     CDevCommonControl();
sl@0:     ~CDevCommonControl();
sl@0:     
sl@0:     // from CDevAudioControl
sl@0:     TInt Stop();
sl@0:     TInt Pause();
sl@0:     TInt Resume();
sl@0:     
sl@0:     // from MAudioProcessingUnitObserver
sl@0:     void StateEvent(MAudioStream& aStream, TInt aError, TAudioState aNewState);
sl@0:     void ProcessingUnitError(MAudioProcessingUnit* aInstance, TInt aError);
sl@0:     
sl@0:     // from MAudioContextObserver
sl@0:     void ContextEvent(TUid aEvent, TInt aError);
sl@0:     
sl@0: protected:
sl@0:     // methods introduced by this class
sl@0:     virtual void FinishWithError(TInt aError) = 0;
sl@0:     
sl@0: private:
sl@0:     //  Internal functions which together implement CDevCommonControl::ContextEvent
sl@0:     void ContextEventUpdateWithoutStateEventNoError();
sl@0:     void ContextEventUpdateWithoutStateEventButWithError(TInt aError);
sl@0:     void ContextEventUpdateWithStateEventNoError();
sl@0:     void ContextEventStateDevSoundAdaptorLoading(); 
sl@0:     void ContextEventStateDevSoundAdaptorUnloading(); 
sl@0:     void ContextEventStateDevSoundAdaptorStopping();
sl@0:     void ContextEventStateDevSoundAdaptorUninitializing();
sl@0:     void ContextEventStateDevSoundAdaptorBeingPreempted();
sl@0:     void ContextEventPauseResumeSequenceDueToEmptyBuffers(TBool aFlush);
sl@0:     void ContextEventUpdateWithStateEventAndError(TInt aError);
sl@0:     void ContextEventUpdateComplete(TInt aError);
sl@0:     void ContextEventPreEmption(TUid aEvent, TInt aError);
sl@0:     void ContextEventAbort(TInt aError);
sl@0:     void ContextEventErrorStateDevSoundAdaptorActivating(TInt aError);
sl@0:     void ContextEventErrorStateDevSoundAdaptorBeingPreempted();
sl@0:     void ContextEventAsynchronousPlayCompletion(TInt aError);
sl@0:     void ContextEventAsynchronousInitializeComplete(TInt aError);
sl@0:     void ContextEventStopDevSoundNotifications();
sl@0:     
sl@0: private:
sl@0:     TBool iBeingPreempted;
sl@0:     TBool iPreemptionClash;
sl@0: 	};
sl@0: 
sl@0: #endif // CDEVCOMMONCONTROL_H
sl@0: 
sl@0: // end of file