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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 examples 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 #include <math.h> |
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43 |
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44 #include <QObject> |
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45 #include <QMainWindow> |
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46 #include <QIODevice> |
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47 #include <QTimer> |
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48 #include <QPushButton> |
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49 #include <QComboBox> |
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50 #include <QByteArray> |
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51 |
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52 #include <qaudiooutput.h> |
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53 |
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54 class Generator : public QIODevice |
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55 { |
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56 Q_OBJECT |
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57 public: |
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58 Generator(const QAudioFormat &format, qint64 durationUs, int frequency, QObject *parent); |
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59 ~Generator(); |
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60 |
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61 void start(); |
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62 void stop(); |
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63 |
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64 qint64 readData(char *data, qint64 maxlen); |
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65 qint64 writeData(const char *data, qint64 len); |
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66 qint64 bytesAvailable() const; |
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67 |
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68 private: |
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69 void generateData(const QAudioFormat &format, qint64 durationUs, int frequency); |
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70 |
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71 private: |
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72 qint64 m_pos; |
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73 QByteArray m_buffer; |
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74 }; |
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75 |
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76 class AudioTest : public QMainWindow |
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77 { |
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78 Q_OBJECT |
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79 public: |
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80 AudioTest(); |
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81 ~AudioTest(); |
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82 |
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83 private: |
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84 void initializeWindow(); |
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85 void initializeAudio(); |
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86 void createAudioOutput(); |
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87 |
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88 private: |
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89 QTimer* m_pullTimer; |
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90 |
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91 // Owned by layout |
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92 QPushButton* m_modeButton; |
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93 QPushButton* m_suspendResumeButton; |
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94 QComboBox* m_deviceBox; |
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95 |
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96 QAudioDeviceInfo m_device; |
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97 Generator* m_generator; |
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98 QAudioOutput* m_audioOutput; |
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99 QIODevice* m_output; // not owned |
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100 QAudioFormat m_format; |
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101 |
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102 bool m_pullMode; |
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103 QByteArray m_buffer; |
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104 |
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105 static const QString PushModeLabel; |
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106 static const QString PullModeLabel; |
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107 static const QString SuspendLabel; |
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108 static const QString ResumeLabel; |
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109 |
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110 private slots: |
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111 void notified(); |
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112 void pullTimerExpired(); |
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113 void toggleMode(); |
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114 void toggleSuspendResume(); |
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115 void stateChanged(QAudio::State state); |
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116 void deviceChanged(int index); |
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117 }; |
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118 |