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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 "engine.h" |
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43 #include "levelmeter.h" |
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44 #include "mainwidget.h" |
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45 #include "waveform.h" |
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46 #include "progressbar.h" |
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47 #include "settingsdialog.h" |
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48 #include "spectrograph.h" |
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49 #include "tonegeneratordialog.h" |
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50 #include "utils.h" |
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51 |
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52 #include <QLabel> |
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53 #include <QPushButton> |
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54 #include <QHBoxLayout> |
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55 #include <QVBoxLayout> |
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56 #include <QStyle> |
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57 #include <QMenu> |
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58 #include <QFileDialog> |
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59 #include <QTimerEvent> |
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60 #include <QMessageBox> |
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61 |
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62 const int NullTimerId = -1; |
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63 |
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64 MainWidget::MainWidget(QWidget *parent) |
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65 : QWidget(parent) |
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66 , m_mode(NoMode) |
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67 , m_engine(new Engine(this)) |
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68 #ifndef DISABLE_WAVEFORM |
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69 , m_waveform(new Waveform(m_engine->buffer(), this)) |
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70 #endif |
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71 , m_progressBar(new ProgressBar(this)) |
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72 , m_spectrograph(new Spectrograph(this)) |
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73 , m_levelMeter(new LevelMeter(this)) |
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74 , m_modeButton(new QPushButton(this)) |
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75 , m_recordButton(new QPushButton(this)) |
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76 , m_pauseButton(new QPushButton(this)) |
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77 , m_playButton(new QPushButton(this)) |
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78 , m_settingsButton(new QPushButton(this)) |
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79 , m_infoMessage(new QLabel(tr("Select a mode to begin"), this)) |
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80 , m_infoMessageTimerId(NullTimerId) |
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81 , m_settingsDialog(new SettingsDialog( |
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82 m_engine->availableAudioInputDevices(), |
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83 m_engine->availableAudioOutputDevices(), |
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84 this)) |
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85 , m_toneGeneratorDialog(new ToneGeneratorDialog(this)) |
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86 , m_modeMenu(new QMenu(this)) |
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87 , m_loadFileAction(0) |
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88 , m_generateToneAction(0) |
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89 , m_recordAction(0) |
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90 { |
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91 m_spectrograph->setParams(SpectrumNumBands, SpectrumLowFreq, SpectrumHighFreq); |
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92 |
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93 createUi(); |
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94 connectUi(); |
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95 } |
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96 |
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97 MainWidget::~MainWidget() |
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98 { |
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99 |
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100 } |
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101 |
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102 |
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103 //----------------------------------------------------------------------------- |
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104 // Public slots |
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105 //----------------------------------------------------------------------------- |
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106 |
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107 void MainWidget::stateChanged(QAudio::Mode mode, QAudio::State state) |
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108 { |
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109 Q_UNUSED(mode); |
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110 |
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111 updateButtonStates(); |
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112 |
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113 if (QAudio::ActiveState != state && QAudio::SuspendedState != state) { |
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114 m_levelMeter->reset(); |
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115 m_spectrograph->reset(); |
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116 } |
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117 } |
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118 |
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119 void MainWidget::formatChanged(const QAudioFormat &format) |
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120 { |
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121 infoMessage(formatToString(format), NullMessageTimeout); |
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122 |
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123 #ifndef DISABLE_WAVEFORM |
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124 if (QAudioFormat() != format) { |
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125 m_waveform->initialize(format, WaveformTileLength, |
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126 WaveformWindowDuration); |
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127 } |
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128 #endif |
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129 } |
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130 |
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131 void MainWidget::spectrumChanged(qint64 position, qint64 length, |
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132 const FrequencySpectrum &spectrum) |
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133 { |
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134 m_progressBar->windowChanged(position, length); |
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135 m_spectrograph->spectrumChanged(spectrum); |
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136 } |
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137 |
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138 void MainWidget::infoMessage(const QString &message, int timeoutMs) |
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139 { |
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140 m_infoMessage->setText(message); |
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141 |
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142 if (NullTimerId != m_infoMessageTimerId) { |
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143 killTimer(m_infoMessageTimerId); |
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144 m_infoMessageTimerId = NullTimerId; |
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145 } |
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146 |
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147 if (NullMessageTimeout != timeoutMs) |
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148 m_infoMessageTimerId = startTimer(timeoutMs); |
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149 } |
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150 |
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151 void MainWidget::errorMessage(const QString &heading, const QString &detail) |
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152 { |
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153 #ifdef Q_OS_SYMBIAN |
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154 const QString message = heading + "\n" + detail; |
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155 QMessageBox::warning(this, "", message, QMessageBox::Close); |
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156 #else |
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157 QMessageBox::warning(this, heading, detail, QMessageBox::Close); |
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158 #endif |
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159 } |
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160 |
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161 void MainWidget::timerEvent(QTimerEvent *event) |
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162 { |
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163 Q_ASSERT(event->timerId() == m_infoMessageTimerId); |
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164 Q_UNUSED(event) // suppress warnings in release builds |
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165 killTimer(m_infoMessageTimerId); |
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166 m_infoMessageTimerId = NullTimerId; |
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167 m_infoMessage->setText(""); |
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168 } |
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169 |
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170 void MainWidget::positionChanged(qint64 positionUs) |
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171 { |
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172 #ifndef DISABLE_WAVEFORM |
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173 qint64 positionBytes = audioLength(m_engine->format(), positionUs); |
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174 m_waveform->positionChanged(positionBytes); |
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175 #else |
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176 Q_UNUSED(positionUs) |
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177 #endif |
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178 } |
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179 |
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180 void MainWidget::bufferDurationChanged(qint64 durationUs) |
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181 { |
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182 m_progressBar->bufferDurationChanged(durationUs); |
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183 } |
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184 |
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185 |
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186 //----------------------------------------------------------------------------- |
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187 // Private slots |
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188 //----------------------------------------------------------------------------- |
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189 |
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190 void MainWidget::dataDurationChanged(qint64 duration) |
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191 { |
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192 #ifndef DISABLE_WAVEFORM |
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193 const qint64 dataLength = audioLength(m_engine->format(), duration); |
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194 m_waveform->dataLengthChanged(dataLength); |
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195 #else |
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196 Q_UNUSED(duration) |
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197 #endif |
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198 |
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199 updateButtonStates(); |
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200 } |
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201 |
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202 void MainWidget::showFileDialog() |
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203 { |
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204 reset(); |
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205 const QString dir; |
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206 const QStringList fileNames = QFileDialog::getOpenFileNames(this, tr("Open WAV file"), dir, "*.wav"); |
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207 if (fileNames.count()) { |
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208 setMode(LoadFileMode); |
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209 m_engine->loadFile(fileNames.front()); |
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210 updateButtonStates(); |
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211 } |
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212 } |
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213 |
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214 void MainWidget::showSettingsDialog() |
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215 { |
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216 reset(); |
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217 m_settingsDialog->exec(); |
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218 if (m_settingsDialog->result() == QDialog::Accepted) { |
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219 m_engine->setAudioInputDevice(m_settingsDialog->inputDevice()); |
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220 m_engine->setAudioOutputDevice(m_settingsDialog->outputDevice()); |
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221 m_engine->setWindowFunction(m_settingsDialog->windowFunction()); |
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222 } |
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223 } |
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224 |
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225 void MainWidget::showToneGeneratorDialog() |
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226 { |
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227 reset(); |
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228 m_toneGeneratorDialog->exec(); |
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229 if (m_toneGeneratorDialog->result() == QDialog::Accepted) { |
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230 setMode(GenerateToneMode); |
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231 const qreal amplitude = m_toneGeneratorDialog->amplitude(); |
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232 if (m_toneGeneratorDialog->isFrequencySweepEnabled()) { |
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233 m_engine->generateSweptTone(amplitude); |
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234 } else { |
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235 const qreal frequency = m_toneGeneratorDialog->frequency(); |
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236 const Tone tone(frequency, amplitude); |
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237 m_engine->generateTone(tone); |
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238 updateButtonStates(); |
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239 } |
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240 } |
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241 } |
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242 |
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243 void MainWidget::initializeRecord() |
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244 { |
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245 reset(); |
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246 setMode(RecordMode); |
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247 if (m_engine->initializeRecord()) |
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248 updateButtonStates(); |
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249 } |
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250 |
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251 |
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252 //----------------------------------------------------------------------------- |
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253 // Private functions |
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254 //----------------------------------------------------------------------------- |
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255 |
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256 void MainWidget::createUi() |
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257 { |
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258 createMenus(); |
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259 |
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260 setWindowTitle(tr("Spectrum Analyser")); |
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261 |
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262 QVBoxLayout *windowLayout = new QVBoxLayout(this); |
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263 |
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264 m_infoMessage->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed); |
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265 m_infoMessage->setAlignment(Qt::AlignHCenter); |
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266 windowLayout->addWidget(m_infoMessage); |
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267 |
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268 #ifdef SUPERIMPOSE_PROGRESS_ON_WAVEFORM |
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269 QScopedPointer<QHBoxLayout> waveformLayout(new QHBoxLayout); |
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270 waveformLayout->addWidget(m_progressBar); |
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271 m_progressBar->setMinimumHeight(m_waveform->minimumHeight()); |
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272 waveformLayout->setMargin(0); |
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273 m_waveform->setLayout(waveformLayout.data()); |
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274 waveformLayout.take(); |
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275 windowLayout->addWidget(m_waveform); |
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276 #else |
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277 #ifndef DISABLE_WAVEFORM |
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278 windowLayout->addWidget(m_waveform); |
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279 #endif // DISABLE_WAVEFORM |
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280 windowLayout->addWidget(m_progressBar); |
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281 #endif // SUPERIMPOSE_PROGRESS_ON_WAVEFORM |
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282 |
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283 // Spectrograph and level meter |
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284 |
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285 QScopedPointer<QHBoxLayout> analysisLayout(new QHBoxLayout); |
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286 analysisLayout->addWidget(m_spectrograph); |
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287 analysisLayout->addWidget(m_levelMeter); |
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288 windowLayout->addLayout(analysisLayout.data()); |
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289 analysisLayout.take(); |
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290 |
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291 // Button panel |
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292 |
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293 const QSize buttonSize(30, 30); |
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294 |
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295 m_modeButton->setText(tr("Mode")); |
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296 |
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297 m_recordIcon = QIcon(":/images/record.png"); |
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298 m_recordButton->setIcon(m_recordIcon); |
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299 m_recordButton->setEnabled(false); |
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300 m_recordButton->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed); |
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301 m_recordButton->setMinimumSize(buttonSize); |
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302 |
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303 m_pauseIcon = style()->standardIcon(QStyle::SP_MediaPause); |
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304 m_pauseButton->setIcon(m_pauseIcon); |
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305 m_pauseButton->setEnabled(false); |
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306 m_pauseButton->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed); |
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307 m_pauseButton->setMinimumSize(buttonSize); |
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308 |
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309 m_playIcon = style()->standardIcon(QStyle::SP_MediaPlay); |
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310 m_playButton->setIcon(m_playIcon); |
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311 m_playButton->setEnabled(false); |
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312 m_playButton->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed); |
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313 m_playButton->setMinimumSize(buttonSize); |
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314 |
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315 m_settingsIcon = QIcon(":/images/settings.png"); |
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316 m_settingsButton->setIcon(m_settingsIcon); |
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317 m_settingsButton->setEnabled(true); |
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318 m_settingsButton->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed); |
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319 m_settingsButton->setMinimumSize(buttonSize); |
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320 |
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321 QScopedPointer<QHBoxLayout> buttonPanelLayout(new QHBoxLayout); |
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322 buttonPanelLayout->addStretch(); |
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323 buttonPanelLayout->addWidget(m_modeButton); |
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324 buttonPanelLayout->addWidget(m_recordButton); |
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325 buttonPanelLayout->addWidget(m_pauseButton); |
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326 buttonPanelLayout->addWidget(m_playButton); |
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327 buttonPanelLayout->addWidget(m_settingsButton); |
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328 |
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329 QWidget *buttonPanel = new QWidget(this); |
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330 buttonPanel->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed); |
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331 buttonPanel->setLayout(buttonPanelLayout.data()); |
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332 buttonPanelLayout.take(); // ownership transferred to buttonPanel |
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333 |
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334 QScopedPointer<QHBoxLayout> bottomPaneLayout(new QHBoxLayout); |
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335 bottomPaneLayout->addWidget(buttonPanel); |
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336 windowLayout->addLayout(bottomPaneLayout.data()); |
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337 bottomPaneLayout.take(); // ownership transferred to windowLayout |
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338 |
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339 // Apply layout |
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340 |
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341 setLayout(windowLayout); |
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342 } |
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343 |
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344 void MainWidget::connectUi() |
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345 { |
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346 CHECKED_CONNECT(m_recordButton, SIGNAL(clicked()), |
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347 m_engine, SLOT(startRecording())); |
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348 |
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349 CHECKED_CONNECT(m_pauseButton, SIGNAL(clicked()), |
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350 m_engine, SLOT(suspend())); |
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351 |
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352 CHECKED_CONNECT(m_playButton, SIGNAL(clicked()), |
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353 m_engine, SLOT(startPlayback())); |
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354 |
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355 CHECKED_CONNECT(m_settingsButton, SIGNAL(clicked()), |
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356 this, SLOT(showSettingsDialog())); |
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357 |
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358 CHECKED_CONNECT(m_engine, SIGNAL(stateChanged(QAudio::Mode,QAudio::State)), |
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359 this, SLOT(stateChanged(QAudio::Mode,QAudio::State))); |
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360 |
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361 CHECKED_CONNECT(m_engine, SIGNAL(formatChanged(const QAudioFormat &)), |
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362 this, SLOT(formatChanged(const QAudioFormat &))); |
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363 |
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364 m_progressBar->bufferDurationChanged(m_engine->bufferDuration()); |
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365 |
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366 CHECKED_CONNECT(m_engine, SIGNAL(bufferDurationChanged(qint64)), |
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367 this, SLOT(bufferDurationChanged(qint64))); |
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368 |
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369 CHECKED_CONNECT(m_engine, SIGNAL(dataDurationChanged(qint64)), |
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370 this, SLOT(dataDurationChanged(qint64))); |
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371 |
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372 CHECKED_CONNECT(m_engine, SIGNAL(recordPositionChanged(qint64)), |
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373 m_progressBar, SLOT(recordPositionChanged(qint64))); |
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374 |
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375 CHECKED_CONNECT(m_engine, SIGNAL(playPositionChanged(qint64)), |
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376 m_progressBar, SLOT(playPositionChanged(qint64))); |
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377 |
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378 CHECKED_CONNECT(m_engine, SIGNAL(recordPositionChanged(qint64)), |
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379 this, SLOT(positionChanged(qint64))); |
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380 |
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381 CHECKED_CONNECT(m_engine, SIGNAL(playPositionChanged(qint64)), |
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382 this, SLOT(positionChanged(qint64))); |
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383 |
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384 CHECKED_CONNECT(m_engine, SIGNAL(levelChanged(qreal, qreal, int)), |
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385 m_levelMeter, SLOT(levelChanged(qreal, qreal, int))); |
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386 |
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387 CHECKED_CONNECT(m_engine, SIGNAL(spectrumChanged(qint64, qint64, const FrequencySpectrum &)), |
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388 this, SLOT(spectrumChanged(qint64, qint64, const FrequencySpectrum &))); |
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389 |
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390 CHECKED_CONNECT(m_engine, SIGNAL(infoMessage(QString, int)), |
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391 this, SLOT(infoMessage(QString, int))); |
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392 |
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393 CHECKED_CONNECT(m_engine, SIGNAL(errorMessage(QString, QString)), |
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394 this, SLOT(errorMessage(QString, QString))); |
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395 |
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396 CHECKED_CONNECT(m_spectrograph, SIGNAL(infoMessage(QString, int)), |
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397 this, SLOT(infoMessage(QString, int))); |
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398 } |
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399 |
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400 void MainWidget::createMenus() |
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401 { |
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402 m_modeButton->setMenu(m_modeMenu); |
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403 |
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404 m_generateToneAction = m_modeMenu->addAction(tr("Play generated tone")); |
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405 m_recordAction = m_modeMenu->addAction(tr("Record and play back")); |
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406 m_loadFileAction = m_modeMenu->addAction(tr("Play file")); |
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407 |
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408 m_loadFileAction->setCheckable(true); |
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409 m_generateToneAction->setCheckable(true); |
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410 m_recordAction->setCheckable(true); |
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411 |
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412 connect(m_loadFileAction, SIGNAL(triggered(bool)), this, SLOT(showFileDialog())); |
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413 connect(m_generateToneAction, SIGNAL(triggered(bool)), this, SLOT(showToneGeneratorDialog())); |
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414 connect(m_recordAction, SIGNAL(triggered(bool)), this, SLOT(initializeRecord())); |
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415 } |
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416 |
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417 void MainWidget::updateButtonStates() |
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418 { |
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419 const bool recordEnabled = ((QAudio::AudioOutput == m_engine->mode() || |
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420 (QAudio::ActiveState != m_engine->state() && |
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421 QAudio::IdleState != m_engine->state())) && |
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422 RecordMode == m_mode); |
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423 m_recordButton->setEnabled(recordEnabled); |
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424 |
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425 const bool pauseEnabled = (QAudio::ActiveState == m_engine->state() || |
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426 QAudio::IdleState == m_engine->state()); |
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427 m_pauseButton->setEnabled(pauseEnabled); |
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428 |
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429 const bool playEnabled = (m_engine->dataDuration() && |
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430 (QAudio::AudioOutput != m_engine->mode() || |
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431 (QAudio::ActiveState != m_engine->state() && |
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432 QAudio::IdleState != m_engine->state()))); |
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433 m_playButton->setEnabled(playEnabled); |
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434 } |
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435 |
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436 void MainWidget::reset() |
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437 { |
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438 #ifndef DISABLE_WAVEFORM |
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439 m_waveform->reset(); |
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440 #endif |
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441 m_engine->reset(); |
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442 m_levelMeter->reset(); |
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443 m_spectrograph->reset(); |
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444 m_progressBar->reset(); |
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445 } |
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446 |
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447 void MainWidget::setMode(Mode mode) |
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448 { |
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449 |
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450 m_mode = mode; |
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451 m_loadFileAction->setChecked(LoadFileMode == mode); |
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452 m_generateToneAction->setChecked(GenerateToneMode == mode); |
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453 m_recordAction->setChecked(RecordMode == mode); |
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454 } |
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455 |