taglib-wasm/dist/src/utils/rating.js

TagLib for TypeScript platforms: Deno, Node.js, Bun, Electron, browsers, and Cloudflare Workers

function toNormalized(popm) {
  return popm / 255;
}
function fromNormalized(normalized) {
  return Math.round(normalized * 255);
}
function toStars(normalized, maxStars = 5) {
  return Math.round(normalized * maxStars);
}
function fromStars(stars, maxStars = 5) {
  return stars / maxStars;
}
const POPM_STAR_VALUES = [0, 1, 64, 128, 196, 255];
function toPopm(normalized) {
  const stars = Math.round(normalized * 5);
  return POPM_STAR_VALUES[stars] ?? 0;
}
function fromPopm(popm) {
  if (popm === 0) return 0;
  if (popm <= 1) return 0.2;
  if (popm <= 64) return 0.4;
  if (popm <= 128) return 0.6;
  if (popm <= 196) return 0.8;
  return 1;
}
function toPercent(normalized) {
  return normalized * 100;
}
function fromPercent(percent) {
  return percent / 100;
}
function clamp(rating) {
  return Math.max(0, Math.min(1, rating));
}
function isValid(rating) {
  return typeof rating === "number" && !isNaN(rating) && rating >= 0 && rating <= 1;
}
const RatingUtils = {
  toNormalized,
  fromNormalized,
  toStars,
  fromStars,
  toPopm,
  fromPopm,
  toPercent,
  fromPercent,
  clamp,
  isValid,
  POPM_STAR_VALUES
};
export {
  RatingUtils,
  clamp,
  fromNormalized,
  fromPercent,
  fromPopm,
  fromStars,
  isValid,
  toNormalized,
  toPercent,
  toPopm,
  toStars
};