sm-26/Source/SynthParams.cpp

#include "SynthParams.h"

namespace sm26 {

static const char* const kStepLabels[] = {
    "1/32",  "1/16T", "1/16",  "1/8T",
    "1/8",   "1/4T",  "1/4",   "1/2T",
    "1/2",   "3/4",   "1",     "3/2",
    "2",     "3",     "4",     "8",
};

static const float kStepBeats[] = {
    0.125f, 0.1667f, 0.25f,  0.3333f,
    0.5f,   0.6667f, 1.0f,   1.3333f,
    2.0f,   3.0f,    4.0f,   6.0f,
    8.0f,   12.0f,   16.0f,  32.0f,
};

const char* const* stepsLabels() { return kStepLabels; }
const float*       stepsBeats()  { return kStepBeats;  }

int stepsPerBeatFor(float stepIndex)
{
    const int i = juce::jlimit(0, 15, (int) juce::roundToInt(stepIndex * 15.0f));
    return juce::roundToInt(kStepBeats[i] * 4.0f);
}

float paramReal(int id, float n01)
{
    n01 = clamp01(n01);
    switch (id)
    {
        case PO1OCT:   return -2.0f + n01 * 4.0f;
        case PO1CT:    return -100.0f + n01 * 200.0f;
        case PO2OCT:   return -2.0f + n01 * 4.0f;
        case PO2CT:    return -100.0f + n01 * 200.0f;
        case PMIX:     return n01;
        case PNOISE:   return n01;
        case PCUTOFF:  return (float) std::exp (std::log (20.0) + n01 * (std::log (20000.0) - std::log (20.0)));
        case PRES:     return 0.5f + n01 * 19.5f;
        case PFENV:    return n01;
        case PATK:     return (float) std::exp (std::log (0.001) + n01 * (std::log (8.0) - std::log (0.001)));
        case PDEC:     return (float) std::exp (std::log (0.002) + n01 * (std::log (8.0) - std::log (0.002)));
        case PSUS:     return n01;
        case PREL:     return (float) std::exp (std::log (0.002) + n01 * (std::log (8.0) - std::log (0.002)));
        case PDTIME:   return (float) std::exp (std::log (10.0) + n01 * (std::log (1500.0) - std::log (10.0)));
        case PDFB:     return n01;
        case PDMIX:    return n01;
        case PDRIVE:   return n01;
        case PGLIDE:   return (float) std::exp (std::log (0.001) + n01 * (std::log (2.0) - std::log (0.001)));
        case PMASTER:  return 0.10f + n01 * 0.70f;
        default:       return n01;
    }
}

float unwrapParameter(int id, float n01)
{
    n01 = clamp01(n01);
    switch (id)
    {
        case PO1OCT: case PO2OCT:
            return juce::jmax (0.0f, juce::jmin (1.0f, (n01 + 2.0f) / 4.0f));
        case PO1CT: case PO2CT:
            return (n01 + 100.0f) / 200.0f;
        case PCUTOFF:
            return (float) ((std::log (n01) - std::log (20.0)) / (std::log (20000.0) - std::log (20.0)));
        case PATK:
            return (float) ((std::log (n01) - std::log (0.001)) / (std::log (8.0) - std::log (0.001)));
        case PDEC:
            return (float) ((std::log (n01) - std::log (0.002)) / (std::log (8.0) - std::log (0.002)));
        case PREL:
            return (float) ((std::log (n01) - std::log (0.002)) / (std::log (8.0) - std::log (0.002)));
        case PDTIME:
            return (float) ((std::log (n01) - std::log (10.0)) / (std::log (1500.0) - std::log (10.0)));
        case PGLIDE:
            return (float) ((std::log (n01) - std::log (0.001)) / (std::log (2.0) - std::log (0.001)));
        case PMASTER:
            return (n01 - 0.10f) / 0.70f;
        default:
            return n01;
    }
}

const char* paramShortName(int id)
{
    static const char* const names[] = {
        "OSC1", "OSC2", "O1-OCT", "O1-DET", "O2-OCT", "O2-DET",
        "MIX",  "NOISE", "CUTOFF", "RES",  "F-ENV",  "F-TYPE",
        "ATK",  "DEC",   "SUS",    "REL",  "D-TIME", "D-STEPS",
        "SYNC", "D-FB",  "D-MIX",  "DRIVE","GLIDE",  "MASTER",
    };
    if (id >= 0 && id < kNumParams) return names[id];
    return "----";
}

const char* paramUnit(int id)
{
    switch (id)
    {
        case PO1OCT: case PO2OCT: return "oct";
        case PO1CT:  case PO2CT:  return "ct";
        case PCUTOFF:             return "Hz";
        case PDTIME:              return "ms";
        default:                  return "";
    }
}

int paramWaveIndex(float n01)
{
    const int i = (int) juce::roundToInt (n01 * 4.0f);
    return juce::jlimit(0, 4, i);
}

int paramFilterType(float n01)
{
    return juce::jlimit (0, 2, (int) juce::roundToInt (n01 * 2.0f));
}

const char* waveName(int w)
{
    switch (w)
    {
        case 0: return "SINE";
        case 1: return "TRI";
        case 2: return "SAW";
        case 3: return "SQRE";
        case 4: return "NSE";
        default: return "----";
    }
}

const char* filterTypeName(int t)
{
    switch (t)
    {
        case 0: return "LP";
        case 1: return "BP";
        case 2: return "HP";
        default: return "LP";
    }
}

String formatTimeMs(float ms)
{
    if (ms >= 1000.0f) return String (ms / 1000.0, 2) + " s";
    return String ((int) juce::roundToInt (ms)) + " ms";
}

String formatFreq(float hz)
{
    if (hz >= 1000.0f) return String (hz / 1000.0, 2) + " kHz";
    return String ((int) juce::roundToInt (hz)) + " Hz";
}

String formatPercent(float v)
{
    return String ((int) juce::roundToInt (v * 100.0f)) + "%";
}

String formatParamReal(int id, float n01)
{
    n01 = clamp01 (n01);
    switch (id)
    {
        case PO1WAVE: case PO2WAVE:
            return waveName (paramWaveIndex (n01));
        case PO1OCT: case PO2OCT:
            return String (paramReal (id, n01), 2);
        case PO1CT:  case PO2CT:
            return String ((int) juce::roundToInt (paramReal (id, n01))) + " ct";
        case PMIX: case PNOISE: case PFENV: case PSUS:
        case PDFB: case PDMIX: case PDRIVE: case PMASTER:
            return formatPercent (n01);
        case PCUTOFF: return formatFreq (paramReal (id, n01));
        case PRES:    return String (paramReal (id, n01), 1);
        case PFTYPE:  return filterTypeName (paramFilterType (n01));
        case PATK: case PDEC: case PREL:
            return formatTimeMs (paramReal (id, n01) * 1000.0f);
        case PDTIME: return formatTimeMs (paramReal (id, n01));
        case PDSTEPS:
            return stepsLabels() [juce::jlimit (0, 15, (int) juce::roundToInt (n01))];
        case PDSYNC:
            return n01 > 0.5f ? "SYNC" : "MS";
        case PGLIDE:
            return formatTimeMs (paramReal (id, n01) * 1000.0f);
        default:
            return String ((int) juce::roundToInt (n01 * 100.0f)) + "%";
    }
}

} // namespace sm26