Symaptic: os/mm/mmhais/a3facl/src/audiogaincontrol/logicalaudiogaincontrol.h@bde4ae8d615e

     1 /*

     2 * Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:

    15 * Name        : logicalaudiogaincontrol.h

    16 * Part of     : ACL Logical Layer

    17 *

    18 */

    22 #ifndef LOGICALAUDIOGAINCONTROL_H

    23 #define LOGICALAUDIOGAINCONTROL_H

    25 #include <e32base.h>

    26 #include <a3f/a3f_trace_utils.h>

    27 #include <a3f/a3fbase.h>

    28 #include <a3f/maudiogaincontrol.h>

    29 #include <a3f/maudiogaincontrolobserver.h>

    31 #include "audioprocessingunit.h"

    34 class MLogicalSettingObserver;

    36 /**

    37 Implementation of audio gain control API.

    39 @lib audiogaincontrol.lib

    40 */

    42 NONSHARABLE_CLASS(CLogicalAudioGainControl) : 	public CAudioProcessingUnit,

    43 												public MAudioGainControl,

    44 												public MAudioGainControlObserver

    45 	{

    46 friend class CAudioContext;

    47 friend class CLogicalAudioStream;

    49 public:

    51 	/**

    52 	Destructor.

    54 	Deletes all objects and releases all resource owned by this instance.

    55 	*/

    56 	virtual ~CLogicalAudioGainControl();

    58 	// from base class MAudioGainControl

    59 	virtual TInt GetMaxGain(TInt& aMaxGain) const;

    60 	virtual TInt GetMaxRampTime(TTimeIntervalMicroSeconds& aMaxRampTime)const;

    61 	virtual TInt SetGain(RArray<TAudioChannelGain>& aChannels, TUid aRampOperation, const TTimeIntervalMicroSeconds& aRampDuration);

    62 	virtual TInt SetGain(RArray<TAudioChannelGain>& aChannels);

    63 	virtual TInt GetGain(RArray<TAudioChannelGain>& aChannels) const;

    64 	virtual TInt RegisterAudioGainControlObserver(MAudioGainControlObserver& aObserver);

    65 	virtual void UnregisterAudioGainControlObserver(MAudioGainControlObserver& aObserver);

    67 	// from base class CAudioProcessingUnit

    68 	virtual TBool IsTypeOf(TUid aTypeId) const;

    69 	virtual TAny* Interface(TUid aType);

    71 	// from base class MAudioGainControlObserver

    72 	void MaxRampTimeChanged(MAudioGainControl& aGain);

    73 	void MaxGainChanged(MAudioGainControl& aGain);

    74 	void GainChanged(MAudioGainControl& aGain, TInt aError);

    76 	/**

    77 	Create a new instance.

    79 	@param aGaincontrol the gain implementation. Ownership of the pointer

    80 			is transferred to the  create CAudioGainControl object instance.

    81 	@return CAudioGainControl* a pointer to the created instance.

    82 	*/

    83 	static CLogicalAudioGainControl* NewL(TAny* aParam);

    86 private:

    88 	void ConstructL();

    90 	CLogicalAudioGainControl(TAny* aParam);

    92 protected:

    93 	RArray<TAudioChannelGain> iActiveChannels;

    95 	RArray<TAudioChannelGain> iDesiredChannels;

    97 	TTimeIntervalMicroSeconds iDesiredRampTime;

    99 	TUid iDesiredRampOperation;

   101 private:

   102 	// Maximum value for ramp time

   103 	TTimeIntervalMicroSeconds iMaxRampTime;

   105 	// The adaptation gain control

   106 	MAudioGainControl* iAdaptationGain;

   108 	RPointerArray<MAudioGainControlObserver> iGainObservers;

   109 	};

   111 #endif // LOGICALAUDIOGAINCONTROL_H

author	sl@SLION-WIN7.fritz.box
	Fri, 15 Jun 2012 03:10:57 +0200
changeset 0	bde4ae8d615e
permissions	-rw-r--r--