nntrivi2001
b71024f244
Two optional named themes from Orca's neutral palette join the Appearance picker (Orca Dark keeps a blue accent so white-on-accent buttons stay legible; Orca Light's status colours are darkened to clear 4.5:1 on their chips). A shown notification can play a sound — None (default), Chime, Pop or Alert — chosen globally and per notification type in Settings → Notifications; the WAVs are generated by scripts/gen-notification-sounds.js.
119 lines
3.2 KiB
JavaScript
119 lines
3.2 KiB
JavaScript
#!/usr/bin/env node
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/**
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* @file Generates the notification sounds `client/public/sounds/{chime,pop,alert}.wav`
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* — 16-bit PCM, 22.05 kHz, mono, each a few sine partials under a short
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* exponential decay — so the app ships no downloaded audio and no licence
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* question. Re-run after changing a tone: `node scripts/gen-notification-sounds.js`.
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* @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
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*/
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"use strict";
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const fs = require("fs");
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const path = require("path");
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const RATE = 22050;
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/** One note: `partials` are [frequency Hz, amplitude], `decay` the e-folding time. */
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function note({ at = 0, dur, partials, decay, sweep = 0 }) {
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return { at, dur, partials, decay, sweep };
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}
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const SOUNDS = {
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// Two bell-like partials, a fifth apart, ringing out.
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chime: [
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note({
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dur: 0.42,
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decay: 0.14,
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partials: [
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[880, 0.55],
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[1320, 0.3],
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[2640, 0.08],
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],
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}),
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],
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// A short drop in pitch.
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pop: [
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note({
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dur: 0.1,
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decay: 0.03,
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sweep: -0.5,
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partials: [
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[620, 0.7],
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[1240, 0.15],
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],
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}),
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],
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// Two quick beeps, high then low.
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alert: [
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note({
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dur: 0.14,
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decay: 0.08,
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partials: [
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[988, 0.5],
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[1976, 0.12],
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],
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}),
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note({
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at: 0.17,
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dur: 0.16,
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decay: 0.09,
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partials: [
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[784, 0.5],
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[1568, 0.12],
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],
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}),
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],
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};
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function render(notes) {
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const total = Math.max(...notes.map((n) => n.at + n.dur));
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const samples = new Float32Array(Math.ceil(total * RATE));
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for (const n of notes) {
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const start = Math.round(n.at * RATE);
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const len = Math.round(n.dur * RATE);
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for (let i = 0; i < len; i++) {
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const t = i / RATE;
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// 4 ms attack and a linear fade over the last 10 ms: no clicks.
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const env =
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Math.min(1, t / 0.004) * Math.exp(-t / n.decay) * Math.min(1, (len - i) / (0.01 * RATE));
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const bend = 1 + (n.sweep * t) / n.dur;
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let v = 0;
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for (const [f, a] of n.partials) v += a * Math.sin(2 * Math.PI * f * bend * t);
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samples[start + i] += v * env;
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}
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}
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return samples;
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}
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function wav(samples) {
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const data = Buffer.alloc(samples.length * 2);
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samples.forEach((s, i) =>
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data.writeInt16LE(Math.round(Math.max(-1, Math.min(1, s)) * 32767), i * 2)
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);
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const h = Buffer.alloc(44);
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h.write("RIFF", 0);
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h.writeUInt32LE(36 + data.length, 4);
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h.write("WAVE", 8);
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h.write("fmt ", 12);
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h.writeUInt32LE(16, 16); // fmt chunk size
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h.writeUInt16LE(1, 20); // PCM
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h.writeUInt16LE(1, 22); // mono
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h.writeUInt32LE(RATE, 24);
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h.writeUInt32LE(RATE * 2, 28); // byte rate
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h.writeUInt16LE(2, 32); // block align
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h.writeUInt16LE(16, 34); // bits per sample
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h.write("data", 36);
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h.writeUInt32LE(data.length, 40);
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return Buffer.concat([h, data]);
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}
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const out = path.join(__dirname, "..", "client", "public", "sounds");
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fs.mkdirSync(out, { recursive: true });
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for (const [name, notes] of Object.entries(SOUNDS)) {
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const file = path.join(out, `${name}.wav`);
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const buf = wav(render(notes));
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if (buf.length > 20 * 1024) throw new Error(`${name}.wav is ${buf.length} bytes, over 20 KB`);
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fs.writeFileSync(file, buf);
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console.log(`${path.relative(process.cwd(), file)} ${buf.length} bytes`);
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}
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