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/*
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* Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:
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* Name : logicalaudiogaincontrol.h
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* Part of : ACL Logical Layer
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*
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*/
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#ifndef LOGICALAUDIOGAINCONTROL_H
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#define LOGICALAUDIOGAINCONTROL_H
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#include <e32base.h>
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#include <a3f/a3f_trace_utils.h>
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#include <a3f/a3fbase.h>
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#include <a3f/maudiogaincontrol.h>
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#include <a3f/maudiogaincontrolobserver.h>
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#include "audioprocessingunit.h"
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class MLogicalSettingObserver;
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/**
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Implementation of audio gain control API.
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@lib audiogaincontrol.lib
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*/
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NONSHARABLE_CLASS(CLogicalAudioGainControl) : public CAudioProcessingUnit,
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public MAudioGainControl,
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public MAudioGainControlObserver
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{
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friend class CAudioContext;
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friend class CLogicalAudioStream;
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public:
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/**
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Destructor.
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Deletes all objects and releases all resource owned by this instance.
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*/
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virtual ~CLogicalAudioGainControl();
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// from base class MAudioGainControl
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virtual TInt GetMaxGain(TInt& aMaxGain) const;
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virtual TInt GetMaxRampTime(TTimeIntervalMicroSeconds& aMaxRampTime)const;
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virtual TInt SetGain(RArray<TAudioChannelGain>& aChannels, TUid aRampOperation, const TTimeIntervalMicroSeconds& aRampDuration);
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virtual TInt SetGain(RArray<TAudioChannelGain>& aChannels);
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virtual TInt GetGain(RArray<TAudioChannelGain>& aChannels) const;
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virtual TInt RegisterAudioGainControlObserver(MAudioGainControlObserver& aObserver);
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virtual void UnregisterAudioGainControlObserver(MAudioGainControlObserver& aObserver);
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// from base class CAudioProcessingUnit
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virtual TBool IsTypeOf(TUid aTypeId) const;
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virtual TAny* Interface(TUid aType);
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// from base class MAudioGainControlObserver
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void MaxRampTimeChanged(MAudioGainControl& aGain);
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void MaxGainChanged(MAudioGainControl& aGain);
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void GainChanged(MAudioGainControl& aGain, TInt aError);
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/**
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Create a new instance.
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@param aGaincontrol the gain implementation. Ownership of the pointer
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is transferred to the create CAudioGainControl object instance.
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@return CAudioGainControl* a pointer to the created instance.
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*/
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static CLogicalAudioGainControl* NewL(TAny* aParam);
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private:
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void ConstructL();
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CLogicalAudioGainControl(TAny* aParam);
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protected:
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RArray<TAudioChannelGain> iActiveChannels;
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RArray<TAudioChannelGain> iDesiredChannels;
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TTimeIntervalMicroSeconds iDesiredRampTime;
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TUid iDesiredRampOperation;
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private:
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// Maximum value for ramp time
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TTimeIntervalMicroSeconds iMaxRampTime;
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// The adaptation gain control
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MAudioGainControl* iAdaptationGain;
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RPointerArray<MAudioGainControlObserver> iGainObservers;
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};
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#endif // LOGICALAUDIOGAINCONTROL_H
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