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
64 lines
2.0 KiB
C++
64 lines
2.0 KiB
C++
#include "Chorus.h"
|
|
|
|
namespace serum
|
|
{
|
|
|
|
void ChorusUnit::prepare (double sampleRate, int)
|
|
{
|
|
sr = sampleRate;
|
|
const int maxDelay = (int) (sr * 0.05); // 50ms
|
|
delayL.assign ((size_t) maxDelay, 0.0f);
|
|
delayR.assign ((size_t) maxDelay, 0.0f);
|
|
reset();
|
|
}
|
|
|
|
void ChorusUnit::reset()
|
|
{
|
|
std::fill (delayL.begin(), delayL.end(), 0.0f);
|
|
std::fill (delayR.begin(), delayR.end(), 0.0f);
|
|
writePos = 0;
|
|
lfoPhase = 0.0;
|
|
}
|
|
|
|
void ChorusUnit::process (float* l, float* r, int numSamples, const float p[4])
|
|
{
|
|
const int len = (int) delayL.size();
|
|
if (len < 4)
|
|
return;
|
|
|
|
const double rate = 0.1 + p[0] * 4.9; // 0.1..5 Hz
|
|
const double depth = (0.5 + p[1] * 5.5) * sr / 1000.0; // 0.5..6 ms
|
|
const double base = 8.0 * sr / 1000.0; // 8 ms centre
|
|
const float width = p[2];
|
|
|
|
for (int i = 0; i < numSamples; ++i)
|
|
{
|
|
const float inL = l[i], inR = r[i];
|
|
delayL[(size_t) writePos] = inL;
|
|
delayR[(size_t) writePos] = inR;
|
|
|
|
lfoPhase += juce::MathConstants<double>::twoPi * rate / sr;
|
|
if (lfoPhase > juce::MathConstants<double>::twoPi) lfoPhase -= juce::MathConstants<double>::twoPi;
|
|
|
|
float sumL = 0.0f, sumR = 0.0f;
|
|
for (int v = 0; v < 2; ++v)
|
|
{
|
|
const double mod = std::sin (lfoPhase + v * juce::MathConstants<double>::pi) * depth;
|
|
const double d = base + mod + (v == 1 ? width * depth * 0.5 : 0.0);
|
|
double readPos = writePos - d;
|
|
if (readPos < 0.0) readPos += len;
|
|
const int i0 = (int) readPos;
|
|
const int i1 = (i0 + 1) % len;
|
|
const float frac = (float) (readPos - std::floor (readPos));
|
|
sumL += delayL[(size_t) i0] * (1.0f - frac) + delayL[(size_t) i1] * frac;
|
|
sumR += delayR[(size_t) i0] * (1.0f - frac) + delayR[(size_t) i1] * frac;
|
|
}
|
|
|
|
l[i] = sumL * 0.5f;
|
|
r[i] = sumR * 0.5f;
|
|
writePos = (writePos + 1) % len;
|
|
}
|
|
}
|
|
|
|
} // namespace serum
|