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1 // Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // |
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15 |
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16 #ifndef AUDIOSTREAMADAPTATION_H |
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17 #define AUDIOSTREAMADAPTATION_H |
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18 |
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19 #include <e32base.h> |
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20 #include <ecom/ecom.h> |
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21 #include <badesca.h> |
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22 #include <a3f/a3fbase.h> |
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23 |
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24 /** |
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25 @publishedAll |
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26 @released |
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27 |
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28 Implementation of the Audio Component Version |
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29 |
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30 */ |
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31 |
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32 class TAudioComponentInfo |
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33 { |
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34 TInt iVersion; |
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35 }; |
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36 |
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37 /** |
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38 @publishedAll |
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39 @released |
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40 |
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41 Implementation of the Stream Adaptation |
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42 |
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43 */ |
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44 |
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45 class MAudioStreamAdaptationObserver; |
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46 class CFourCCConvertor; |
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47 class MLogicalChain; |
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48 class MAudioContext; |
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49 |
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50 const TUid KAudioComponentManagerUid = {0x10283462}; |
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51 |
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52 // Messages flags |
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53 const TInt KServerStopping = 0x01; |
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54 const TInt KPreemptionRequest = 0x02; |
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55 |
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56 /** |
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57 @publishedAll |
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58 @released |
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59 |
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60 This is the interface to AudioStreamAdaptation. |
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61 This is represent the stream loaded when the MMRC server |
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62 selects the adaptation. |
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63 |
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64 This functionality includes audio playback and recording using different formats |
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65 CAudioStreamAdaptation provides the access point for clients to Adaptation Layer. |
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66 It is responsible for initializing connections to various subsystems |
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67 in audio adaptation. These include setting up and managing connection |
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68 to the low level audio adaptation API implementations. The connections are then made |
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69 available . |
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70 */ |
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71 class CAudioStreamAdaptation : public CBase |
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72 { |
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73 |
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74 public: |
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75 |
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76 /** |
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77 Constructs, and returns a pointer to, a new CAudioComponentManager object. |
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78 |
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79 @return A pointer to the CAudioComponentManager instance. |
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80 */ |
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81 static CAudioStreamAdaptation* NewL(TUid aType); |
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82 |
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83 /** |
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84 Destructor. |
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85 |
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86 Deletes all objects and releases all resource owned by this instance. |
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87 */ |
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88 virtual ~CAudioStreamAdaptation(); |
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89 |
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90 |
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91 /** |
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92 Returns if a message was passed through the adaptation. |
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93 |
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94 @param MLogicalChain |
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95 Logical Current Chain |
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96 @param MLogicalChain |
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97 Desired Chain after message |
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98 @return An error code indicating if the function call was successful. KErrNone on success, otherwise |
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99 another of the system-wide error codes. |
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100 */ |
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101 |
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102 virtual TInt Message(MLogicalChain& aCurrentChain, MLogicalChain& aDesiredChain, MAudioContext& aContext, TInt aFlags) = 0; |
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103 |
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104 /** |
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105 Returns if a Audio Stream Observer was Registered. |
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106 |
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107 @param MAudioStreamAdaptationObserver |
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108 Observer object witch will be registered |
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109 @return An error code indicating if the function call was successful. KErrNone on success, otherwise |
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110 another of the system-wide error codes. |
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111 */ |
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112 |
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113 virtual TInt RegisterAudioStreamObserver(MAudioStreamAdaptationObserver& aObserver) = 0 ; |
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114 |
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115 /** |
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116 Returns if a Audio Stream Observer was UnRegistered. |
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117 |
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118 @param MAudioStreamAdaptationObserver |
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119 Observer object witch will be unregistered |
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120 */ |
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121 |
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122 virtual void UnregisterAudioStreamObserver(MAudioStreamAdaptationObserver& aObserver) = 0; |
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123 |
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124 virtual void UnregisterAllAudioStreamObserver() = 0; |
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125 |
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126 virtual void SetFourCC(const CFourCCConvertor& aFourCCConvertor) = 0; |
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127 |
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128 |
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129 private: |
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130 |
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131 /** iDtor_ID_Key Instance identifier key. When instance of an |
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132 * implementation is created by ECOM framework, the |
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133 * framework will assign UID for it. The UID is used in |
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134 * destructor to notify framework that this instance is |
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135 * being destroyed and resources can be released. |
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136 */ |
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137 TUid iDtor_ID_Key; |
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138 }; |
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139 |
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140 #include "audiostreamadaptation.inl" |
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141 |
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142 #endif // C_AUDIOCOMPONENTMANAGER_H |