@thi.ng/dsp/serial.js

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

import { AProc } from "./aproc.js";
function serial(...procs) {
  const [a, b, c, d] = procs;
  switch (procs.length) {
    case 2:
      return new Serial2(a, b);
    case 3:
      return new Serial3(a, b, c);
    case 4:
      return new Serial4(a, b, c, d);
    default:
      return new Serial(procs);
  }
}
class Serial2 extends AProc {
  constructor(_a, _b) {
    super(null);
    this._a = _a;
    this._b = _b;
  }
  next(x) {
    return this._val = this._b.next(this._a.next(x));
  }
}
class Serial3 extends AProc {
  constructor(_a, _b, _c) {
    super(null);
    this._a = _a;
    this._b = _b;
    this._c = _c;
  }
  next(x) {
    return this._val = this._c.next(this._b.next(this._a.next(x)));
  }
}
class Serial4 extends AProc {
  constructor(_a, _b, _c, _d) {
    super(null);
    this._a = _a;
    this._b = _b;
    this._c = _c;
    this._d = _d;
  }
  next(x) {
    return this._val = this._d.next(
      this._c.next(this._b.next(this._a.next(x)))
    );
  }
}
class Serial extends AProc {
  constructor(_procs) {
    super(null);
    this._procs = _procs;
  }
  next(x) {
    return this._val = this._procs.reduce((x2, p) => p.next(x2), x);
  }
}
export {
  Serial,
  Serial2,
  Serial3,
  Serial4,
  serial
};