Initial release — InstaGrain granular synthesizer v1.0
8-voice polyphonic granular synth (VST3/AU/LV2) with: - 128 grain pool per voice, Hann windowing, linear interpolation - Root note selector, sample rate correction, sustain pedal (CC64) - Scatter controls, direction modes (Fwd/Rev/PingPong), freeze - ADSR envelope, global filter (LP/HP/BP), reverb - Waveform display with grain visualization - Drag & drop sample loading, full state save/restore - CI/CD for Windows/macOS/Linux Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
hariel1985
252
Source/PluginEditor.cpp
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252
Source/PluginEditor.cpp
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#include "PluginEditor.h"
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InstaGrainEditor::InstaGrainEditor (InstaGrainProcessor& p)
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: AudioProcessorEditor (&p), processor (p)
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{
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setLookAndFeel (&lookAndFeel);
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setSize (900, 650);
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setResizable (true, true);
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setResizeLimits (700, 500, 1400, 1000);
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// Title
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titleLabel.setText ("INSTAGRAIN", juce::dontSendNotification);
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titleLabel.setJustificationType (juce::Justification::centredLeft);
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titleLabel.setColour (juce::Label::textColourId, InstaGrainLookAndFeel::accent);
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addAndMakeVisible (titleLabel);
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// Version
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versionLabel.setText (kInstaGrainVersion, juce::dontSendNotification);
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versionLabel.setJustificationType (juce::Justification::centredLeft);
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versionLabel.setColour (juce::Label::textColourId, InstaGrainLookAndFeel::textSecondary);
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addAndMakeVisible (versionLabel);
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// Load button
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loadButton.onClick = [this]
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{
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fileChooser = std::make_unique<juce::FileChooser> (
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"Load Sample", juce::File(), "*.wav;*.aif;*.aiff;*.mp3;*.flac;*.ogg");
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fileChooser->launchAsync (juce::FileBrowserComponent::openMode | juce::FileBrowserComponent::canSelectFiles,
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[this] (const juce::FileChooser& fc)
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{
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auto file = fc.getResult();
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if (file.existsAsFile())
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loadSampleFile (file);
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});
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};
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addAndMakeVisible (loadButton);
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// Bypass
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bypassButton.setToggleState (processor.bypass.load(), juce::dontSendNotification);
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addAndMakeVisible (bypassButton);
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bypassLabel.setText ("BYPASS", juce::dontSendNotification);
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bypassLabel.setJustificationType (juce::Justification::centredLeft);
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bypassLabel.setColour (juce::Label::textColourId, InstaGrainLookAndFeel::textSecondary);
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addAndMakeVisible (bypassLabel);
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// Panels
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addAndMakeVisible (waveformDisplay);
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addAndMakeVisible (grainPanel);
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addAndMakeVisible (scatterPanel);
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addAndMakeVisible (envelopePanel);
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addAndMakeVisible (effectsPanel);
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addAndMakeVisible (masterPanel);
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// Waveform position callback
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waveformDisplay.onPositionChanged = [this] (float pos)
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{
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processor.getEngine().position.store (pos);
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grainPanel.positionKnob.setValue (pos, juce::dontSendNotification);
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};
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// Initialize waveform if sample already loaded
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if (processor.getEngine().hasSample())
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waveformDisplay.setBuffer (&processor.getEngine().getSampleBuffer());
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// Sync knobs from engine state
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syncKnobsToEngine();
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// Start timer (30 Hz)
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startTimerHz (30);
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}
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InstaGrainEditor::~InstaGrainEditor()
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{
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setLookAndFeel (nullptr);
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stopTimer();
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}
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void InstaGrainEditor::loadSampleFile (const juce::File& file)
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{
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processor.getEngine().loadSample (file);
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waveformDisplay.setBuffer (&processor.getEngine().getSampleBuffer());
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}
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void InstaGrainEditor::syncKnobsToEngine()
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{
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auto& eng = processor.getEngine();
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grainPanel.positionKnob.setValue (eng.position.load(), juce::dontSendNotification);
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grainPanel.sizeKnob.setValue (eng.grainSizeMs.load(), juce::dontSendNotification);
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grainPanel.densityKnob.setValue (eng.density.load(), juce::dontSendNotification);
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grainPanel.pitchKnob.setValue (eng.pitchSemitones.load(), juce::dontSendNotification);
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grainPanel.panKnob.setValue (eng.pan.load(), juce::dontSendNotification);
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grainPanel.rootNoteBox.setSelectedId (eng.rootNote.load() + 1, juce::dontSendNotification);
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scatterPanel.posScatterKnob.setValue (eng.posScatter.load(), juce::dontSendNotification);
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scatterPanel.sizeScatterKnob.setValue (eng.sizeScatter.load(), juce::dontSendNotification);
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scatterPanel.pitchScatterKnob.setValue (eng.pitchScatter.load(), juce::dontSendNotification);
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scatterPanel.panScatterKnob.setValue (eng.panScatter.load(), juce::dontSendNotification);
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scatterPanel.directionBox.setSelectedId (eng.direction.load() + 1, juce::dontSendNotification);
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scatterPanel.freezeButton.setToggleState (eng.freeze.load(), juce::dontSendNotification);
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envelopePanel.attackKnob.setValue (eng.attackTime.load(), juce::dontSendNotification);
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envelopePanel.decayKnob.setValue (eng.decayTime.load(), juce::dontSendNotification);
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envelopePanel.sustainKnob.setValue (eng.sustainLevel.load(), juce::dontSendNotification);
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envelopePanel.releaseKnob.setValue (eng.releaseTime.load(), juce::dontSendNotification);
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effectsPanel.filterTypeBox.setSelectedId (eng.filterType.load() + 1, juce::dontSendNotification);
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effectsPanel.cutoffKnob.setValue (eng.filterCutoff.load(), juce::dontSendNotification);
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effectsPanel.resoKnob.setValue (eng.filterReso.load(), juce::dontSendNotification);
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effectsPanel.reverbSizeKnob.setValue (eng.reverbSize.load(), juce::dontSendNotification);
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effectsPanel.reverbDecayKnob.setValue (eng.reverbDecay.load(), juce::dontSendNotification);
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masterPanel.volumeKnob.setValue (eng.masterVolume.load(), juce::dontSendNotification);
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bypassButton.setToggleState (processor.bypass.load(), juce::dontSendNotification);
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}
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void InstaGrainEditor::syncEngineFromKnobs()
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{
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auto& eng = processor.getEngine();
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eng.position.store ((float) grainPanel.positionKnob.getValue());
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eng.grainSizeMs.store ((float) grainPanel.sizeKnob.getValue());
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eng.density.store ((float) grainPanel.densityKnob.getValue());
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eng.pitchSemitones.store ((float) grainPanel.pitchKnob.getValue());
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eng.pan.store ((float) grainPanel.panKnob.getValue());
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eng.rootNote.store (grainPanel.rootNoteBox.getSelectedId() - 1);
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eng.posScatter.store ((float) scatterPanel.posScatterKnob.getValue());
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eng.sizeScatter.store ((float) scatterPanel.sizeScatterKnob.getValue());
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eng.pitchScatter.store ((float) scatterPanel.pitchScatterKnob.getValue());
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eng.panScatter.store ((float) scatterPanel.panScatterKnob.getValue());
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eng.direction.store (scatterPanel.directionBox.getSelectedId() - 1);
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eng.freeze.store (scatterPanel.freezeButton.getToggleState());
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eng.attackTime.store ((float) envelopePanel.attackKnob.getValue());
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eng.decayTime.store ((float) envelopePanel.decayKnob.getValue());
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eng.sustainLevel.store ((float) envelopePanel.sustainKnob.getValue());
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eng.releaseTime.store ((float) envelopePanel.releaseKnob.getValue());
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eng.filterType.store (effectsPanel.filterTypeBox.getSelectedId() - 1);
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eng.filterCutoff.store ((float) effectsPanel.cutoffKnob.getValue());
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eng.filterReso.store ((float) effectsPanel.resoKnob.getValue());
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eng.reverbSize.store ((float) effectsPanel.reverbSizeKnob.getValue());
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eng.reverbDecay.store ((float) effectsPanel.reverbDecayKnob.getValue());
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eng.masterVolume.store ((float) masterPanel.volumeKnob.getValue());
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processor.bypass.store (bypassButton.getToggleState());
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}
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void InstaGrainEditor::timerCallback()
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{
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// GUI → Engine
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syncEngineFromKnobs();
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// Update waveform visualization
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auto& eng = processor.getEngine();
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waveformDisplay.setGrainPosition (eng.position.load());
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waveformDisplay.setScatterRange (eng.posScatter.load());
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waveformDisplay.setActiveGrains (eng.getActiveGrainInfo());
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// Update VU meter
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masterPanel.vuMeter.setLevel (eng.vuLevelL.load(), eng.vuLevelR.load());
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}
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void InstaGrainEditor::paint (juce::Graphics& g)
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{
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// Background
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g.fillAll (InstaGrainLookAndFeel::bgDark);
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lookAndFeel.drawBackgroundTexture (g, getLocalBounds());
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// Top bar background
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float scale = (float) getHeight() / 650.0f;
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int topBarH = (int) (36.0f * scale);
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g.setColour (InstaGrainLookAndFeel::bgMedium.withAlpha (0.7f));
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g.fillRect (0, 0, getWidth(), topBarH);
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g.setColour (InstaGrainLookAndFeel::bgLight.withAlpha (0.3f));
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g.drawHorizontalLine (topBarH, 0, (float) getWidth());
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}
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void InstaGrainEditor::resized()
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{
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auto bounds = getLocalBounds();
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float scale = (float) getHeight() / 650.0f;
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int topBarH = (int) (36.0f * scale);
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int padding = (int) (6.0f * scale);
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// Top bar
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auto topBar = bounds.removeFromTop (topBarH).reduced (padding, 0);
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titleLabel.setFont (lookAndFeel.getBoldFont (20.0f * scale));
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titleLabel.setBounds (topBar.removeFromLeft ((int) (130 * scale)));
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versionLabel.setFont (lookAndFeel.getRegularFont (13.0f * scale));
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versionLabel.setBounds (topBar.removeFromLeft ((int) (50 * scale)));
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// Right side: bypass + load
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auto bypassArea = topBar.removeFromRight ((int) (30 * scale));
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bypassButton.setBounds (bypassArea);
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bypassLabel.setFont (lookAndFeel.getRegularFont (11.0f * scale));
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bypassLabel.setBounds (topBar.removeFromRight ((int) (50 * scale)));
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topBar.removeFromRight (padding);
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loadButton.setBounds (topBar.removeFromRight ((int) (120 * scale)).reduced (0, 2));
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auto content = bounds.reduced (padding);
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// Waveform display (~40%)
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int waveH = (int) (content.getHeight() * 0.40f);
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waveformDisplay.setBounds (content.removeFromTop (waveH));
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content.removeFromTop (padding);
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// Middle row: Grain + Scatter (~25%)
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int midH = (int) (content.getHeight() * 0.45f);
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auto midRow = content.removeFromTop (midH);
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int halfW = midRow.getWidth() / 2;
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grainPanel.setBounds (midRow.removeFromLeft (halfW - padding / 2));
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midRow.removeFromLeft (padding);
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scatterPanel.setBounds (midRow);
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content.removeFromTop (padding);
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// Bottom row: Envelope + Effects + Master
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auto botRow = content;
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int thirdW = botRow.getWidth() / 3;
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envelopePanel.setBounds (botRow.removeFromLeft (thirdW - padding / 2).reduced (0, 0));
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botRow.removeFromLeft (padding);
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effectsPanel.setBounds (botRow.removeFromLeft (thirdW - padding / 2).reduced (0, 0));
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botRow.removeFromLeft (padding);
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masterPanel.setBounds (botRow);
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}
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bool InstaGrainEditor::isInterestedInFileDrag (const juce::StringArray& files)
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{
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for (auto& f : files)
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{
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auto ext = juce::File (f).getFileExtension().toLowerCase();
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if (ext == ".wav" || ext == ".aif" || ext == ".aiff" || ext == ".mp3"
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|| ext == ".flac" || ext == ".ogg")
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return true;
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}
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return false;
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}
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void InstaGrainEditor::filesDropped (const juce::StringArray& files, int /*x*/, int /*y*/)
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{
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for (auto& f : files)
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{
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juce::File file (f);
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auto ext = file.getFileExtension().toLowerCase();
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if (ext == ".wav" || ext == ".aif" || ext == ".aiff" || ext == ".mp3"
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|| ext == ".flac" || ext == ".ogg")
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{
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loadSampleFile (file);
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break;
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}
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}
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}
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