Initial plugin version

2025-06-23 00:16:47 +01:00
commit 01d446af2d
61 changed files with 1658 additions and 0 deletions
--- a/Source/ScopeComponent.h
+++ b/Source/ScopeComponent.h
@@ -0,0 +1,102 @@
+#pragma once
+
+#include "AudioBufferQueue.h"
+
+//==============================================================================
+template <typename SampleType>
+class ScopeComponent : public juce::Component,
+    private juce::Timer
+{
+public:
+    using Queue = AudioBufferQueue<SampleType>;
+
+    //==============================================================================
+    ScopeComponent(Queue& queueToUse)
+        : audioBufferQueue(queueToUse)
+    {
+        sampleData.fill(SampleType(0));
+        setFramesPerSecond(30);
+    }
+
+    //==============================================================================
+    void setFramesPerSecond(int framesPerSecond)
+    {
+        jassert(framesPerSecond > 0 && framesPerSecond < 1000);
+        startTimerHz(framesPerSecond);
+    }
+
+    //==============================================================================
+    void paint(juce::Graphics& g) override
+    {
+        g.fillAll(juce::Colours::black);
+        g.setColour(juce::Colours::white);
+
+        auto area = getLocalBounds();
+        auto h = (SampleType)area.getHeight();
+        auto w = (SampleType)area.getWidth();
+
+        // Oscilloscope
+        auto scopeRect = juce::Rectangle<SampleType>{ SampleType(0), SampleType(0), w, h / 2 };
+        plot(sampleData.data(), sampleData.size(), g, scopeRect, SampleType(1), h / 4);
+
+        // Spectrum
+        auto spectrumRect = juce::Rectangle<SampleType>{ SampleType(0), h / 2, w, h / 2 };
+        plot(spectrumData.data(), spectrumData.size() / 4, g, spectrumRect);
+    }
+
+    //==============================================================================
+    void resized() override {}
+
+private:
+    //==============================================================================
+    Queue& audioBufferQueue;
+    std::array<SampleType, Queue::bufferSize> sampleData;
+
+    juce::dsp::FFT fft{ Queue::order };
+    using WindowFun = juce::dsp::WindowingFunction<SampleType>;
+    WindowFun windowFun{ (size_t)fft.getSize(), WindowFun::hann };
+    std::array<SampleType, 2 * Queue::bufferSize> spectrumData;
+
+    //==============================================================================
+    void timerCallback() override
+    {
+        audioBufferQueue.pop(sampleData.data());
+        juce::FloatVectorOperations::copy(spectrumData.data(), sampleData.data(), (int)sampleData.size());
+
+        auto fftSize = (size_t)fft.getSize();
+
+        jassert(spectrumData.size() == 2 * fftSize);
+        windowFun.multiplyWithWindowingTable(spectrumData.data(), fftSize);
+        fft.performFrequencyOnlyForwardTransform(spectrumData.data());
+
+        static constexpr auto mindB = SampleType(-160);
+        static constexpr auto maxdB = SampleType(0);
+
+        for (auto& s : spectrumData)
+            s = juce::jmap(juce::jlimit(mindB, maxdB, juce::Decibels::gainToDecibels(s) - juce::Decibels::gainToDecibels(SampleType(fftSize))), mindB, maxdB, SampleType(0), SampleType(1));
+
+        repaint();
+    }
+
+    //==============================================================================
+    static void plot(const SampleType* data,
+        size_t numSamples,
+        juce::Graphics& g,
+        juce::Rectangle<SampleType> rect,
+        SampleType scaler = SampleType(1),
+        SampleType offset = SampleType(0))
+    {
+        auto w = rect.getWidth();
+        auto h = rect.getHeight();
+        auto right = rect.getRight();
+
+        auto center = rect.getBottom() - offset;
+        auto gain = h * scaler;
+
+        for (size_t i = 1; i < numSamples; ++i)
+            g.drawLine({ juce::jmap(SampleType(i - 1), SampleType(0), SampleType(numSamples - 1), SampleType(right - w), SampleType(right)),
+                          center - gain * data[i - 1],
+                          juce::jmap(SampleType(i), SampleType(0), SampleType(numSamples - 1), SampleType(right - w), SampleType(right)),
+                          center - gain * data[i] });
+    }
+};