wave-roll/dist/peaks-CMRd2e3C.js

JavaScript Library for Comparative MIDI Piano-Roll Visualization

function M(a, n = 2e3) {
  const g = a.numberOfChannels, f = a.length, c = Math.max(1, Math.floor(f / n)), h = new Array(n).fill(0), s = new Array(n).fill(0);
  for (let t = 0; t < n; t++) {
    let b = t * c, x = t === n - 1 ? f : b + c, e = 1 / 0, i = -1 / 0;
    for (let o = 0; o < g; o++) {
      const y = a.getChannelData(o);
      for (let r = b; r < x; r++) {
        const l = y[r];
        l < e && (e = l), l > i && (i = l);
      }
    }
    isFinite(e) || (e = 0), isFinite(i) || (i = 0), h[t] = Math.abs(e), s[t] = Math.abs(i);
  }
  return { min: h, max: s };
}
export {
  M as getPeaksFromAudioBuffer
};