SM-26 synthesizer: initial implementation

Source/SynthParams.h

@@ -0,0 +1,71 @@
+#pragma once
+
+#include <JuceHeader.h>
+#include <array>
+
+namespace sm26 {
+
+enum ParamId : int {
+    PO1WAVE = 0, PO2WAVE, PO1OCT, PO1CT, PO2OCT, PO2CT,
+    PMIX, PNOISE, PCUTOFF, PRES, PFENV, PFTYPE,
+    PATK, PDEC, PSUS, PREL,
+    PDTIME, PDSTEPS, PDSYNC, PDFB, PDMIX,
+    PDRIVE, PGLIDE, PMASTER,
+    kNumParams
+};
+
+static constexpr int kNumKnobs = 4;
+
+struct ControlDef {
+    const char* name;
+    int         param = 0;
+    float       lo    = 0.0f;
+    float       hi    = 1.0f;
+};
+
+struct Preset {
+    const char* name;
+    const char* category;
+    std::array<float, kNumParams> base;
+    std::array<ControlDef, kNumKnobs> ctl;
+};
+
+inline std::array<float, kNumParams> defaultParams()
+{
+    std::array<float, kNumParams> d{};
+    d[PO1WAVE] = 0.0f; d[PO2WAVE] = 0.0f;
+    d[PO1OCT]  = 0.50f; d[PO1CT]  = 0.50f;
+    d[PO2OCT]  = 0.50f; d[PO2CT]  = 0.54f;
+    d[PMIX]    = 0.18f; d[PNOISE] = 0.02f;
+    d[PCUTOFF] = 0.68f; d[PRES]   = 0.22f;
+    d[PFENV]   = 0.38f; d[PFTYPE] = 0.0f;
+    d[PATK]    = 0.12f; d[PDEC]   = 0.48f;
+    d[PSUS]    = 0.50f; d[PREL]   = 0.55f;
+    d[PDTIME]  = 0.30f; d[PDSTEPS]= 6.0f;
+    d[PDSYNC]  = 1.0f;  d[PDFB]   = 0.42f;
+    d[PDMIX]   = 0.42f; d[PDRIVE] = 0.16f;
+    d[PGLIDE]  = 0.0f;  d[PMASTER]= 0.70f;
+    return d;
+}
+
+const char* paramShortName(int id);
+const char* paramUnit(int id);
+float paramReal(int id, float n01);
+inline float clamp01(float v) { return v < 0.f ? 0.f : (v > 1.f ? 1.f : v); }
+
+int  paramFilterType(float n01);
+
+String  formatParamReal(int id, float n01);
+int     paramWaveIndex(float n01);
+float   unwrapParameter(int id, float n01);
+
+String  formatTimeMs(float ms);
+String  formatFreq(float hz);
+String  formatPercent(float v);
+const char* waveName(int w);
+
+const char* const* stepsLabels();
+const float*       stepsBeats();
+int  stepsPerBeatFor(float stepIndex);
+
+} // namespace sm26