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1 /**************************************************************************** |
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2 ** |
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3 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). |
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4 ** All rights reserved. |
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5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
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6 ** |
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7 ** This file is part of the QtMultimedia module of the Qt Toolkit. |
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8 ** |
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9 ** $QT_BEGIN_LICENSE:LGPL$ |
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10 ** No Commercial Usage |
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11 ** This file contains pre-release code and may not be distributed. |
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12 ** You may use this file in accordance with the terms and conditions |
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13 ** contained in the Technology Preview License Agreement accompanying |
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14 ** this package. |
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15 ** |
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16 ** GNU Lesser General Public License Usage |
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17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
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18 ** General Public License version 2.1 as published by the Free Software |
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19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
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20 ** packaging of this file. Please review the following information to |
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21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
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22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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23 ** |
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24 ** In addition, as a special exception, Nokia gives you certain additional |
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25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
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26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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27 ** |
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28 ** If you have questions regarding the use of this file, please contact |
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29 ** Nokia at qt-info@nokia.com. |
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30 ** |
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31 ** |
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32 ** |
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33 ** |
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34 ** |
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35 ** |
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36 ** |
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37 ** |
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38 ** $QT_END_LICENSE$ |
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39 ** |
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40 ****************************************************************************/ |
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41 |
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42 // |
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43 // W A R N I N G |
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44 // ------------- |
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45 // |
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46 // This file is not part of the Qt API. It exists for the convenience |
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47 // of other Qt classes. This header file may change from version to |
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48 // version without notice, or even be removed. |
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49 // |
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50 // We mean it. |
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51 // |
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52 |
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53 #ifndef QAUDIO_SYMBIAN_P_H |
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54 #define QAUDIO_SYMBIAN_P_H |
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55 |
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56 #include <QtCore/qnamespace.h> |
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57 #include <QtMultimedia/qaudioformat.h> |
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58 #include <QtMultimedia/qaudio.h> |
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59 #include <sounddevice.h> |
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60 |
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61 QT_BEGIN_NAMESPACE |
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62 |
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63 namespace SymbianAudio { |
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64 |
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65 /** |
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66 * Default values used by audio input and output classes, when underlying |
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67 * DevSound instance has not yet been created. |
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68 */ |
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69 |
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70 const int DefaultBufferSize = 4096; // bytes |
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71 const int DefaultNotifyInterval = 1000; // ms |
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72 |
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73 /** |
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74 * Enumeration used to track state of internal DevSound instances. |
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75 * Values are translated to the corresponding QAudio::State values by |
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76 * SymbianAudio::Utils::stateNativeToQt. |
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77 */ |
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78 enum State { |
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79 ClosedState |
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80 , InitializingState |
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81 , ActiveState |
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82 , IdleState |
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83 , SuspendedState |
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84 }; |
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85 |
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86 /* |
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87 * Helper class for querying DevSound codec / format support |
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88 */ |
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89 class DevSoundCapabilities { |
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90 public: |
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91 DevSoundCapabilities(CMMFDevSound &devsound, QAudio::Mode mode); |
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92 ~DevSoundCapabilities(); |
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93 |
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94 const RArray<TFourCC>& fourCC() const { return m_fourCC; } |
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95 const TMMFCapabilities& caps() const { return m_caps; } |
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96 |
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97 private: |
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98 void constructL(CMMFDevSound &devsound, QAudio::Mode mode); |
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99 |
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100 private: |
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101 RArray<TFourCC> m_fourCC; |
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102 TMMFCapabilities m_caps; |
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103 }; |
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104 |
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105 namespace Utils { |
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106 |
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107 /** |
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108 * Convert native audio capabilities to QAudio lists. |
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109 */ |
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110 void capabilitiesNativeToQt(const DevSoundCapabilities &caps, |
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111 QList<int> &frequencies, |
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112 QList<int> &channels, |
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113 QList<int> &sampleSizes, |
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114 QList<QAudioFormat::Endian> &byteOrders, |
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115 QList<QAudioFormat::SampleType> &sampleTypes); |
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116 |
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117 /** |
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118 * Check whether format is supported. |
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119 */ |
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120 bool isFormatSupported(const QAudioFormat &format, |
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121 const DevSoundCapabilities &caps); |
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122 |
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123 /** |
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124 * Convert QAudioFormat to native format types. |
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125 * |
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126 * Note that, despite the name, DevSound uses TMMFCapabilities to specify |
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127 * single formats as well as capabilities. |
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128 * |
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129 * Note that this function does not modify outputFormat.iBufferSize. |
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130 */ |
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131 bool formatQtToNative(const QAudioFormat &inputFormat, |
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132 TUint32 &outputFourCC, |
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133 TMMFCapabilities &outputFormat); |
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134 |
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135 /** |
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136 * Convert internal states to QAudio states. |
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137 */ |
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138 QAudio::State stateNativeToQt(State nativeState, |
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139 QAudio::State initializingState); |
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140 |
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141 /** |
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142 * Convert data length to number of samples. |
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143 */ |
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144 qint64 bytesToSamples(const QAudioFormat &format, qint64 length); |
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145 |
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146 /** |
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147 * Convert number of samples to data length. |
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148 */ |
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149 qint64 samplesToBytes(const QAudioFormat &format, qint64 samples); |
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150 |
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151 } // namespace Utils |
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152 } // namespace SymbianAudio |
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153 |
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154 QT_END_NAMESPACE |
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155 |
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156 #endif |