a587a43ff9
Dual-stage compressor (optical + VCA) with output transformer saturation. - Port-Hamiltonian T4B opto-cell model with implicit trapezoidal integration - Feed-forward VCA with 7 ratios, 6 attack/release presets, Dual release mode - 3 transformer types (Nickel/Iron/Steel) with 4x oversampled waveshaping - Analog-style needle VU meters, horizontal GR meters - Sidechain HPF, stereo link, independent section bypass - Full state save/restore, CI/CD for Windows/macOS/Linux
42 sor
1.1 KiB
C++
42 sor
1.1 KiB
C++
#pragma once
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#include <cmath>
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#include <algorithm>
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class VCACompressor
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{
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public:
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VCACompressor();
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void prepare (double sampleRate);
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void reset();
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// Process one sample: sidechainDb = input level in dB
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// Returns gain in linear scale (0..1)
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float processSample (float sidechainDb, float thresholdDb, float ratio,
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float attackSec, float releaseSec, bool dualRelease);
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float getGainReductionDb() const { return currentGrDb; }
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private:
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double sr = 44100.0;
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// Gain smoothing state (dB domain)
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double smoothedGrDb = 0.0;
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// Dual release state
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double dualFastEnv = 0.0; // fast release envelope
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double dualSlowEnv = 0.0; // slow release envelope
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bool wasCompressing = false;
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float currentGrDb = 0.0f;
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// Soft-knee width
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static constexpr float kneeWidthDb = 6.0f;
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// Gain computer: returns desired GR in dB (negative value)
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float computeGainReduction (float inputDb, float thresholdDb, float ratio) const;
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// Coefficient helpers
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double makeCoeff (double timeSec) const;
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};
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