Merge pull request #10 from Boof2015/VSTs

Add cross platform VSTs

plugin/Source/SpectrumEngine.h

@@ -0,0 +1,54 @@
+#pragma once
+
+#include "ScopeEngine.h"
+#include "spectrum.h"   // reused, unmodified, from native/src
+#include <vector>
+
+class SpectrumEngine : public ScopeEngine
+{
+public:
+    const char* scopeId() const override { return "spectrum"; }
+    juce::Identifier frameEventId() const override { return frameId; }
+    PreferredSize preferredSize() const override { return { 820, 320, 360, 180 }; }
+
+    void setSampleRate(double sampleRate) override
+    {
+        spectrum.setSampleRate((float) sampleRate);
+    }
+
+    void configure(const juce::var& settings) override
+    {
+        const int fftSize = (int) settings.getProperty("fftSize", 2048);
+        if (fftSize > 0 && (size_t) fftSize != spectrum.getFFTSize())
+            spectrum.setFFTSize((size_t) fftSize);
+
+        spectrum.setSmoothing((float) (double) settings.getProperty("smoothing", 0.9));
+    }
+
+    void process(const float* left, const float* right, int numSamples) override
+    {
+        if (numSamples > 0)
+            spectrum.pushStereoSamples(left, right, (size_t) numSamples);
+        else
+            spectrum.pushStereoSamples(nullptr, nullptr, 0); // recompute / decay
+    }
+
+    juce::var buildFrame(double sampleRate) override
+    {
+        auto* obj = new juce::DynamicObject();
+        obj->setProperty("sampleRate", sampleRate);
+        obj->setProperty("magnitudes", toBase64(spectrum.getMagnitudes()));
+        obj->setProperty("side", toBase64(spectrum.getSideMagnitudes()));
+        return juce::var(obj);
+    }
+
+private:
+    static juce::String toBase64(const std::vector<float>& data)
+    {
+        return data.empty() ? juce::String()
+                            : juce::Base64::toBase64(data.data(), data.size() * sizeof(float));
+    }
+
+    const juce::Identifier frameId { "spectrumFrame" };
+    Visualizer::Spectrum spectrum { 2048 };
+};