sl@0: /*
sl@0: * Copyright (c) 2004-2009 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: * Name        : logicalaudiogaincontrol.h
sl@0: * Part of     : ACL Logical Layer
sl@0: *
sl@0: */
sl@0: 
sl@0: 
sl@0: 
sl@0: #ifndef LOGICALAUDIOGAINCONTROL_H
sl@0: #define LOGICALAUDIOGAINCONTROL_H
sl@0: 
sl@0: #include <e32base.h>
sl@0: #include <a3f/a3f_trace_utils.h>
sl@0: #include <a3f/a3fbase.h>
sl@0: #include <a3f/maudiogaincontrol.h>
sl@0: #include <a3f/maudiogaincontrolobserver.h>
sl@0: 
sl@0: #include "audioprocessingunit.h"
sl@0: 
sl@0: 
sl@0: class MLogicalSettingObserver;
sl@0: 
sl@0: /**
sl@0: Implementation of audio gain control API.
sl@0: 
sl@0: @lib audiogaincontrol.lib
sl@0: */
sl@0: 
sl@0: NONSHARABLE_CLASS(CLogicalAudioGainControl) : 	public CAudioProcessingUnit,
sl@0: 												public MAudioGainControl,
sl@0: 												public MAudioGainControlObserver
sl@0: 	{
sl@0: friend class CAudioContext;
sl@0: friend class CLogicalAudioStream;
sl@0: 
sl@0: public:
sl@0: 
sl@0: 	/**
sl@0: 	Destructor.
sl@0: 
sl@0: 	Deletes all objects and releases all resource owned by this instance.
sl@0: 	*/
sl@0: 	virtual ~CLogicalAudioGainControl();
sl@0: 
sl@0: 	// from base class MAudioGainControl
sl@0: 	virtual TInt GetMaxGain(TInt& aMaxGain) const;
sl@0: 	virtual TInt GetMaxRampTime(TTimeIntervalMicroSeconds& aMaxRampTime)const;
sl@0: 	virtual TInt SetGain(RArray<TAudioChannelGain>& aChannels, TUid aRampOperation, const TTimeIntervalMicroSeconds& aRampDuration);
sl@0: 	virtual TInt SetGain(RArray<TAudioChannelGain>& aChannels);
sl@0: 	virtual TInt GetGain(RArray<TAudioChannelGain>& aChannels) const;
sl@0: 	virtual TInt RegisterAudioGainControlObserver(MAudioGainControlObserver& aObserver);
sl@0: 	virtual void UnregisterAudioGainControlObserver(MAudioGainControlObserver& aObserver);
sl@0: 
sl@0: 	// from base class CAudioProcessingUnit
sl@0: 	virtual TBool IsTypeOf(TUid aTypeId) const;
sl@0: 	virtual TAny* Interface(TUid aType);
sl@0: 
sl@0: 	// from base class MAudioGainControlObserver
sl@0: 	void MaxRampTimeChanged(MAudioGainControl& aGain);
sl@0: 	void MaxGainChanged(MAudioGainControl& aGain);
sl@0: 	void GainChanged(MAudioGainControl& aGain, TInt aError);
sl@0: 
sl@0: 	/**
sl@0: 	Create a new instance.
sl@0: 
sl@0: 	@param aGaincontrol the gain implementation. Ownership of the pointer
sl@0: 			is transferred to the  create CAudioGainControl object instance.
sl@0: 	@return CAudioGainControl* a pointer to the created instance.
sl@0: 	*/
sl@0: 	static CLogicalAudioGainControl* NewL(TAny* aParam);
sl@0: 
sl@0: 
sl@0: private:
sl@0: 
sl@0: 	void ConstructL();
sl@0: 
sl@0: 	CLogicalAudioGainControl(TAny* aParam);
sl@0: 
sl@0: protected:
sl@0: 	RArray<TAudioChannelGain> iActiveChannels;
sl@0: 
sl@0: 	RArray<TAudioChannelGain> iDesiredChannels;
sl@0: 
sl@0: 	TTimeIntervalMicroSeconds iDesiredRampTime;
sl@0: 
sl@0: 	TUid iDesiredRampOperation;
sl@0: 
sl@0: private:
sl@0: 	// Maximum value for ramp time
sl@0: 	TTimeIntervalMicroSeconds iMaxRampTime;
sl@0: 
sl@0: 	// The adaptation gain control
sl@0: 	MAudioGainControl* iAdaptationGain;
sl@0: 
sl@0: 	RPointerArray<MAudioGainControlObserver> iGainObservers;
sl@0: 	};
sl@0: 
sl@0: #endif // LOGICALAUDIOGAINCONTROL_H