1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/mm/mmhais/refacladapt/src/audiogaincontrol/audiogaincontrol.h	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,94 @@
     1.4 +/*
     1.5 +* Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
     1.6 +* All rights reserved.
     1.7 +* This component and the accompanying materials are made available
     1.8 +* under the terms of "Eclipse Public License v1.0"
     1.9 +* which accompanies this distribution, and is available
    1.10 +* at the URL "http://www.eclipse.org/legal/epl-v10.html".
    1.11 +*
    1.12 +* Initial Contributors:
    1.13 +* Nokia Corporation - initial contribution.
    1.14 +*
    1.15 +* Contributors:
    1.16 +*
    1.17 +* Description:
    1.18 +*
    1.19 +*/
    1.20 +
    1.21 +
    1.22 +
    1.23 +#ifndef AUDIOGAINCONTROL_H
    1.24 +#define AUDIOGAINCONTROL_H
    1.25 +
    1.26 +#include <e32base.h>
    1.27 +#include <a3f/a3fbase.h>
    1.28 +#include <a3f/maudiogaincontrol.h>
    1.29 +#include <a3f/maudiogaincontrolobserver.h>
    1.30 +
    1.31 +#include "mgainhelper.h"
    1.32 +
    1.33 +#include <a3f/a3f_trace_utils.h>
    1.34 +
    1.35 +
    1.36 +const TUint KDefaultGain = 5;
    1.37 +const TUint KDefaultMaxGain = 255; // TODO should discover at run time but this is value of current Symbian sound driver adaptor
    1.38 +const TUint KDefaultNumChannels = 2;
    1.39 +const TUint KDefaultMaxRampTime = 5;
    1.40 +
    1.41 +enum TGainControlPanicCode
    1.42 +	{
    1.43 +	EAdaptationOldSetGainCalledPanic,
    1.44 +	};
    1.45 +
    1.46 +/**
    1.47 + *  Implementation of audio gain control API.
    1.48 + *  ?more_complete_description
    1.49 + *  @lib audiogaincontrol.lib
    1.50 + */
    1.51 +NONSHARABLE_CLASS(CAudioGainControl) : 	public CBase, public MAudioGainControl
    1.52 +	{
    1.53 +public:
    1.54 +
    1.55 +	IMPORT_C static CAudioGainControl* NewL();
    1.56 +	/**
    1.57 +	* Destructor.
    1.58 +	*
    1.59 +	* Deletes all objects and releases all resource owned by this instance.
    1.60 +	*/
    1.61 +	virtual ~CAudioGainControl();
    1.62 +
    1.63 +	IMPORT_C void SetHelper(MGainHelper& aHelper);
    1.64 +
    1.65 +	IMPORT_C void IssueGainChangedCallBack(TInt aError);
    1.66 +
    1.67 +	IMPORT_C TInt ConfigureRamp(TUid aRampOperation, const TTimeIntervalMicroSeconds& aRampDuration);
    1.68 +
    1.69 +	void IssueMaxGainChangedCallBack();
    1.70 +	void IssueMaxRampTimeChangedCallBack();
    1.71 +
    1.72 +	// from base class MAudioGainControl
    1.73 +	TInt GetMaxGain(TInt& aMaxGain) const;
    1.74 +	TInt GetMaxRampTime(TTimeIntervalMicroSeconds& aMaxRampTime) const;
    1.75 +	TInt SetGain(RArray<TAudioChannelGain>& aChannels, TUid aRampOperation, const TTimeIntervalMicroSeconds& aRampDuration);
    1.76 +	TInt SetGain(RArray<TAudioChannelGain>& aChannels);
    1.77 +	TInt GetGain(RArray<TAudioChannelGain>& aChannels) const;
    1.78 +	TInt RegisterAudioGainControlObserver(MAudioGainControlObserver& aObserver);
    1.79 +	void UnregisterAudioGainControlObserver(MAudioGainControlObserver& aObserver);
    1.80 +
    1.81 +private:
    1.82 +	void ConstructL();
    1.83 +
    1.84 +	CAudioGainControl();
    1.85 +
    1.86 +private: //data
    1.87 +	RArray<TAudioChannelGain> iGains;
    1.88 +	/**
    1.89 +	 * Reference to observer instance
    1.90 +	 */
    1.91 +	RPointerArray<MAudioGainControlObserver> iGainObservers;
    1.92 +
    1.93 +	// The gain cannot talk directly with the sound device driver so it needs a helper to request
    1.94 +	MGainHelper*	iHelper;
    1.95 +	};
    1.96 +
    1.97 +#endif // AUDIOGAINCONTROL_H