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1 /*
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2 This code accompanies the textbook:
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3
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4 Digital Audio Effects: Theory, Implementation and Application
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5 Joshua D. Reiss and Andrew P. McPherson
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6
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7 ---
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8
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9 Ring Modulator: modulation using a carrier oscillator
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10 See textbook Chapter 5: Amplitude Modulation
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11
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12 Code by Andrew McPherson, Brecht De Man and Joshua Reiss
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13
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14 ---
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15
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16 This program is free software: you can redistribute it and/or modify
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17 it under the terms of the GNU General Public License as published by
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18 the Free Software Foundation, either version 3 of the License, or
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19 (at your option) any later version.
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20
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21 This program is distributed in the hope that it will be useful,
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22 but WITHOUT ANY WARRANTY; without even the implied warranty of
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23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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24 GNU General Public License for more details.
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25
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26 You should have received a copy of the GNU General Public License
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27 along with this program. If not, see <http://www.gnu.org/licenses/>.
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28 */
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29
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30 #include "PluginProcessor.h"
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31 #include "PluginEditor.h"
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32
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33 //==============================================================================
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34 RingModulatorAudioProcessorEditor::RingModulatorAudioProcessorEditor (RingModulatorAudioProcessor* ownerFilter)
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35 : AudioProcessorEditor (ownerFilter),
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36 sweepWidthLabel_("", "LFO Sweep Width (Hz):"),
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37 lfoFrequencyLabel_("", "LFO Frequency:"),
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38 carrierFrequencyLabel_("", "Carrier Frequency:"),
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39 waveformLabel_("", "LFO Waveform:")
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40 {
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41 // Set up the sliders
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42 addAndMakeVisible (&carrierFrequencySlider_);
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43 carrierFrequencySlider_.setSliderStyle (Slider::Rotary);
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44 carrierFrequencySlider_.addListener (this);
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45 carrierFrequencySlider_.setRange (1.0, 1000.0, 1.0);
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46
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47 addAndMakeVisible (&sweepWidthSlider_);
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48 sweepWidthSlider_.setSliderStyle (Slider::Rotary);
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49 sweepWidthSlider_.addListener (this);
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50 sweepWidthSlider_.setRange (0.0, 100.0, 0.2);
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51
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52 addAndMakeVisible (&lfoFrequencySlider_);
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53 lfoFrequencySlider_.setSliderStyle (Slider::Rotary);
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54 lfoFrequencySlider_.addListener (this);
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55 lfoFrequencySlider_.setRange (0.1, 10.0, 0.05);
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56
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57 addAndMakeVisible(&waveformComboBox_);
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58 waveformComboBox_.setEditableText(false);
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59 waveformComboBox_.setJustificationType(Justification::left);
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60 waveformComboBox_.addItem("Sine", RingModulatorAudioProcessor::kWaveformSine);
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61 waveformComboBox_.addItem("Triangle", RingModulatorAudioProcessor::kWaveformTriangle);
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62 waveformComboBox_.addItem("Square", RingModulatorAudioProcessor::kWaveformSquare);
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63 waveformComboBox_.addItem("Sawtooth (rising)", RingModulatorAudioProcessor::kWaveformSawtooth);
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64 waveformComboBox_.addItem("Sawtooth (falling)", RingModulatorAudioProcessor::kWaveformInverseSawtooth);
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65 waveformComboBox_.addListener(this);
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66
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67 carrierFrequencyLabel_.attachToComponent(&carrierFrequencySlider_, false);
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68 carrierFrequencyLabel_.setFont(Font (11.0f));
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69
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70 sweepWidthLabel_.attachToComponent(&sweepWidthSlider_, false);
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71 sweepWidthLabel_.setFont(Font (11.0f));
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72
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73 lfoFrequencyLabel_.attachToComponent(&lfoFrequencySlider_, false);
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74 lfoFrequencyLabel_.setFont(Font (11.0f));
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75
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76 waveformLabel_.attachToComponent(&waveformComboBox_, false);
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77 waveformLabel_.setFont(Font (11.0f));
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78
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79 // add the triangular resizer component for the bottom-right of the UI
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80 addAndMakeVisible(resizer_ = new ResizableCornerComponent (this, &resizeLimits_));
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81 resizeLimits_.setSizeLimits(370, 160, 600, 300);
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82
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83 // set our component's initial size to be the last one that was stored in the filter's settings
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84 setSize(ownerFilter->lastUIWidth_,
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85 ownerFilter->lastUIHeight_);
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86
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87 startTimer(50);
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88 }
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89
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90 RingModulatorAudioProcessorEditor::~RingModulatorAudioProcessorEditor()
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91 {
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92 }
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93
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94 //==============================================================================
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95 void RingModulatorAudioProcessorEditor::paint (Graphics& g)
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96 {
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97 g.fillAll (Colours::grey);
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98 }
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99
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100 void RingModulatorAudioProcessorEditor::resized()
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101 {
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102 carrierFrequencySlider_.setBounds(20, 20, 150, 40);
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103 lfoFrequencySlider_.setBounds(200, 20, 150, 40);
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104 sweepWidthSlider_.setBounds (20, 80, 150, 40);
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105 waveformComboBox_.setBounds (200, 80, 150, 30);
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106
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107 resizer_->setBounds(getWidth() - 16, getHeight() - 16, 16, 16);
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108
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109 getProcessor()->lastUIWidth_ = getWidth();
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110 getProcessor()->lastUIHeight_ = getHeight();
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111 }
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112
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113 //==============================================================================
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114 // This timer periodically checks whether any of the filter's parameters have changed...
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115 void RingModulatorAudioProcessorEditor::timerCallback()
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116 {
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117 RingModulatorAudioProcessor* ourProcessor = getProcessor();
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118
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119 carrierFrequencySlider_.setValue(ourProcessor->carrierFrequency_, dontSendNotification);
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120 sweepWidthSlider_.setValue(ourProcessor->sweepWidth_, dontSendNotification);
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121 lfoFrequencySlider_.setValue(ourProcessor->lfoFrequency_, dontSendNotification);
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122 waveformComboBox_.setSelectedId(ourProcessor->waveform_, dontSendNotification);
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123 }
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124
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125 // This is our Slider::Listener callback, when the user drags a slider.
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126 void RingModulatorAudioProcessorEditor::sliderValueChanged (Slider* slider)
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127 {
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128 // It's vital to use setParameterNotifyingHost to change any parameters that are automatable
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129 // by the host, rather than just modifying them directly, otherwise the host won't know
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130 // that they've changed.
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131
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132 if (slider == &carrierFrequencySlider_)
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133 {
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134 getProcessor()->setParameterNotifyingHost (RingModulatorAudioProcessor::kCarrierFrequencyParam,
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135 (float)carrierFrequencySlider_.getValue());
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136 }
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137 else if (slider == &sweepWidthSlider_)
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138 {
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139 getProcessor()->setParameterNotifyingHost (RingModulatorAudioProcessor::kSweepWidthParam,
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140 (float)sweepWidthSlider_.getValue());
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141 }
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142 else if (slider == &lfoFrequencySlider_)
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143 {
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144 getProcessor()->setParameterNotifyingHost (RingModulatorAudioProcessor::kLFOFrequencyParam,
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145 (float)lfoFrequencySlider_.getValue());
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146 }
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147 }
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148
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149 // Similar callback to sliderValueChanged for ComboBox updates
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150 void RingModulatorAudioProcessorEditor::comboBoxChanged (ComboBox *comboBox)
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151 {
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152 if(comboBox == &waveformComboBox_)
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153 {
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154 getProcessor()->setParameterNotifyingHost (RingModulatorAudioProcessor::kWaveformParam,
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155 (float)waveformComboBox_.getSelectedId());
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156 }
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157 }
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