feat(fx): add effect rack and effect units

2026-09-08 14:55:22 +02:00
parent 4021b9cdf7
commit 5a80534a2e
21 changed files with 1104 additions and 0 deletions
@@ -0,0 +1,39 @@
+#include "EQ.h"
+
+namespace serum
+{
+
+void EQUnit::prepare (double sampleRate, int)
+{
+    sr = sampleRate;
+    lowL.setSampleRate (sr);  lowR.setSampleRate (sr);
+    midL.setSampleRate (sr);  midR.setSampleRate (sr);
+    highL.setSampleRate (sr); highR.setSampleRate (sr);
+    reset();
+}
+
+void EQUnit::reset()
+{
+    lowL.clear(); lowR.clear(); midL.clear(); midR.clear(); highL.clear(); highR.clear();
+}
+
+void EQUnit::process (float* l, float* r, int numSamples, const float p[4])
+{
+    const double lowGain  = (p[0] - 0.5f) * 2.0f * 15.0;
+    const double midGain  = (p[1] - 0.5f) * 2.0f * 12.0;
+    const double highGain = (p[2] - 0.5f) * 2.0f * 15.0;
+    const double midFreq  = 200.0 + p[3] * 4800.0;
+
+    lowL.setLowShelf (200.0, lowGain);    lowR.setLowShelf (200.0, lowGain);
+    midL.setPeak (midFreq, midGain, 0.8); midR.setPeak (midFreq, midGain, 0.8);
+    highL.setHighShelf (4000.0, highGain); highR.setHighShelf (4000.0, highGain);
+
+    for (int i = 0; i < numSamples; ++i)
+    {
+        const float xL = l[i], xR = r[i];
+        l[i] = highL.process (midL.process (lowL.process (xL)));
+        r[i] = highR.process (midR.process (lowR.process (xR)));
+    }
+}
+
+} // namespace serum