@thi.ng/dsp/mapg.js

Composable signal generators, oscillators, filters, FFT, spectrum, windowing & related DSP utils

import { illegalArity } from "@thi.ng/errors/illegal-arity";
import { AGen } from "./agen.js";
function mapG(op, ...args) {
  switch (args.length) {
    case 2:
      return new MapG1(op, args[0], args[1]);
    case 3:
      return new MapG2(op, args[0], args[1], args[2]);
    case 4:
      return new MapG3(op, args[0], args[1], args[2], args[3]);
    case 5:
      return new MapG4(op, args[0], args[1], args[2], args[3], args[4]);
    default:
      illegalArity(args.length);
  }
}
class MapG1 extends AGen {
  constructor(_op, _a, init) {
    super(init);
    this._op = _op;
    this._a = _a;
  }
  next() {
    return this._val = this._op(this._a.next(), this._val);
  }
}
class MapG2 extends AGen {
  constructor(_op, _a, _b, init) {
    super(init);
    this._op = _op;
    this._a = _a;
    this._b = _b;
  }
  next() {
    return this._val = this._op(
      this._a.next(),
      this._b.next(),
      this._val
    );
  }
}
class MapG3 extends AGen {
  constructor(_op, _a, _b, _c, init) {
    super(init);
    this._op = _op;
    this._a = _a;
    this._b = _b;
    this._c = _c;
  }
  next() {
    return this._val = this._op(
      this._a.next(),
      this._b.next(),
      this._c.next(),
      this._val
    );
  }
}
class MapG4 extends AGen {
  constructor(_op, _a, _b, _c, _d, init) {
    super(init);
    this._op = _op;
    this._a = _a;
    this._b = _b;
    this._c = _c;
    this._d = _d;
  }
  next() {
    return this._val = this._op(
      this._a.next(),
      this._b.next(),
      this._c.next(),
      this._d.next(),
      this._val
    );
  }
}
export {
  MapG1,
  MapG2,
  MapG3,
  MapG4,
  mapG
};