biggy
e4cea300db
Round 1 findings and fixes, all previously uncommitted: - FXProcessor per-slot DSP history repair (HEAD does not compile without it) - SynthVoice::getModulationValue, editor control-lock guard - ExactCompare.h naming the deliberate exact float comparisons - KnobLookAndFeel replacing the never-installed SerumLookAndFeel - 55 first-party compiler warnings to 0 - AGENT.md renamed to AGENTS.md across Source/ - graft repository context graph and its hooks - JANITOR_TASKS.md and UI_UX_AUDIT.md records
75 lines
2.5 KiB
C++
75 lines
2.5 KiB
C++
#pragma once
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#include <JuceHeader.h>
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#include "Params.h"
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namespace serum
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{
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// ===========================================================================
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// Free-running LFO with tempo sync, seven shapes (sine/tri/saw/square/S&H/
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// step-sequencer/freehand), adjustable phase, fade-in and start delay.
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// ===========================================================================
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class LFO
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{
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public:
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static constexpr int kShapePoints = 64;
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LFO() { reset(); }
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void prepare (double sampleRate) { sr = sampleRate; reset(); }
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void reset();
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void setParams (float rateNorm, bool sync, float beat, int shape, float phase,
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float fade, float delay);
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void setTempo (double bpm) noexcept { tempo = bpm; }
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void setShapeData (const std::vector<float>& data, int steps);
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float process() noexcept; // advance and return current value
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float advance (int numSamples) noexcept;
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float getPhase() const noexcept { return (float) (phase + phaseOffset - std::floor (phase + phaseOffset)); }
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float getValue() const noexcept { return value; }
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const std::vector<float>& getShapeData() const noexcept { return shapeBuffer; }
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int getShapeSteps() const noexcept { return shapeSteps; }
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private:
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double sr = 44100.0;
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double tempo = 120.0;
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double phase = 0.0;
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double phaseOffset = 0.0;
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double rateHz = 1.0;
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float value = 0.0f;
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int shape = 0;
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bool sync = false;
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float beat = 0.25f;
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double delaySeconds = 0.0;
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double fadeSeconds = 0.0;
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double delayCounter = 0.0; // samples remaining before start
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double fadeCounter = 0.0; // samples elapsed in fade
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float fadeVal = 1.0f;
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float prevDelayParam = -1.0f;
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float prevFadeParam = -1.0f;
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std::vector<float> shapeBuffer;
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int shapeSteps = 16;
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juce::Random rng;
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float holdValue = 0.0f;
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float shapeValue() noexcept;
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};
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// ===========================================================================
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// Pure shape evaluation shared by the audio render (LFO::shapeValue) and the
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// GUI preview (LFODisplay::valueAt), so the drawn shape cannot drift from the
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// played one. `sampleHoldValue` supplies the current held level for
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// LfoShape::SampleHold, which is stateful in the audio path.
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// ===========================================================================
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float lfoShapeValue (float phase, LfoShape shape, int steps,
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const float* data, int dataSize, float sampleHoldValue) noexcept;
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} // namespace serum
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