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1 /* |
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2 * Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: |
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15 * Name : logicalaudiogaincontrol.h |
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16 * Part of : ACL Logical Layer |
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17 * |
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18 */ |
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19 |
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20 |
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21 |
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22 #ifndef LOGICALAUDIOGAINCONTROL_H |
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23 #define LOGICALAUDIOGAINCONTROL_H |
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24 |
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25 #include <e32base.h> |
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26 #include <a3f/a3f_trace_utils.h> |
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27 #include <a3f/a3fbase.h> |
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28 #include <a3f/maudiogaincontrol.h> |
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29 #include <a3f/maudiogaincontrolobserver.h> |
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30 |
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31 #include "audioprocessingunit.h" |
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32 |
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33 |
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34 class MLogicalSettingObserver; |
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35 |
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36 /** |
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37 Implementation of audio gain control API. |
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38 |
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39 @lib audiogaincontrol.lib |
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40 */ |
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41 |
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42 NONSHARABLE_CLASS(CLogicalAudioGainControl) : public CAudioProcessingUnit, |
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43 public MAudioGainControl, |
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44 public MAudioGainControlObserver |
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45 { |
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46 friend class CAudioContext; |
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47 friend class CLogicalAudioStream; |
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48 |
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49 public: |
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50 |
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51 /** |
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52 Destructor. |
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53 |
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54 Deletes all objects and releases all resource owned by this instance. |
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55 */ |
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56 virtual ~CLogicalAudioGainControl(); |
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57 |
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58 // from base class MAudioGainControl |
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59 virtual TInt GetMaxGain(TInt& aMaxGain) const; |
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60 virtual TInt GetMaxRampTime(TTimeIntervalMicroSeconds& aMaxRampTime)const; |
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61 virtual TInt SetGain(RArray<TAudioChannelGain>& aChannels, TUid aRampOperation, const TTimeIntervalMicroSeconds& aRampDuration); |
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62 virtual TInt SetGain(RArray<TAudioChannelGain>& aChannels); |
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63 virtual TInt GetGain(RArray<TAudioChannelGain>& aChannels) const; |
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64 virtual TInt RegisterAudioGainControlObserver(MAudioGainControlObserver& aObserver); |
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65 virtual void UnregisterAudioGainControlObserver(MAudioGainControlObserver& aObserver); |
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66 |
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67 // from base class CAudioProcessingUnit |
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68 virtual TBool IsTypeOf(TUid aTypeId) const; |
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69 virtual TAny* Interface(TUid aType); |
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70 |
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71 // from base class MAudioGainControlObserver |
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72 void MaxRampTimeChanged(MAudioGainControl& aGain); |
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73 void MaxGainChanged(MAudioGainControl& aGain); |
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74 void GainChanged(MAudioGainControl& aGain, TInt aError); |
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75 |
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76 /** |
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77 Create a new instance. |
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78 |
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79 @param aGaincontrol the gain implementation. Ownership of the pointer |
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80 is transferred to the create CAudioGainControl object instance. |
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81 @return CAudioGainControl* a pointer to the created instance. |
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82 */ |
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83 static CLogicalAudioGainControl* NewL(TAny* aParam); |
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84 |
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85 |
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86 private: |
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87 |
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88 void ConstructL(); |
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89 |
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90 CLogicalAudioGainControl(TAny* aParam); |
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91 |
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92 protected: |
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93 RArray<TAudioChannelGain> iActiveChannels; |
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94 |
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95 RArray<TAudioChannelGain> iDesiredChannels; |
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96 |
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97 TTimeIntervalMicroSeconds iDesiredRampTime; |
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98 |
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99 TUid iDesiredRampOperation; |
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100 |
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101 private: |
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102 // Maximum value for ramp time |
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103 TTimeIntervalMicroSeconds iMaxRampTime; |
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104 |
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105 // The adaptation gain control |
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106 MAudioGainControl* iAdaptationGain; |
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107 |
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108 RPointerArray<MAudioGainControlObserver> iGainObservers; |
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109 }; |
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110 |
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111 #endif // LOGICALAUDIOGAINCONTROL_H |