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Boof2015
56 lines
2.0 KiB
C++
56 lines
2.0 KiB
C++
#pragma once
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#include "ScopeEngine.h"
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#include "lufsmeter.h" // reused, unmodified, from native/src
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/**
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* Loudness (LUFS) meter engine. Pushes stereo audio into the reused
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* `Visualizer::LUFSMeterAnalyzer` (K-weighting + gated integration + the same fast
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* VU/peak/correlation block) and emits its scalar snapshot each frame. Like the VU
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* engine the frame is plain numbers (no base64); getSnapshot() advances peak decay
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* on the steady clock, so it's safe to call every frame. configure() is a no-op —
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* LUFS settings (mode/readout) are render-side.
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*/
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class LUFSMeterEngine : public ScopeEngine
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{
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public:
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const char* scopeId() const override { return "lufsmeter"; }
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juce::Identifier frameEventId() const override { return frameId; }
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void setSampleRate(double sampleRate) override
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{
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lufs.setSampleRate((float) sampleRate);
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}
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void configure(const juce::var&) override {}
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void process(const float* left, const float* right, int numSamples) override
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{
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if (numSamples <= 0)
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return;
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lufs.pushSamples(left, right, (size_t) numSamples);
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}
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juce::var buildFrame(double sampleRate) override
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{
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const auto snap = lufs.getSnapshot();
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auto* obj = new juce::DynamicObject();
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obj->setProperty("sampleRate", sampleRate);
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obj->setProperty("momentaryLUFS", snap.momentaryLUFS);
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obj->setProperty("shortTermLUFS", snap.shortTermLUFS);
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obj->setProperty("integratedLUFS", snap.integratedLUFS);
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obj->setProperty("vuLDb", snap.vuLDb);
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obj->setProperty("vuRDb", snap.vuRDb);
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obj->setProperty("barLDb", snap.barLDb);
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obj->setProperty("barRDb", snap.barRDb);
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obj->setProperty("peakLDb", snap.peakLDb);
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obj->setProperty("peakRDb", snap.peakRDb);
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obj->setProperty("correlation", snap.correlation);
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return juce::var(obj);
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}
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private:
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const juce::Identifier frameId { "lufsmeterFrame" };
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Visualizer::LUFSMeterAnalyzer lufs;
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};
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