d-piano/demo.html at main · d-buckner/d-piano · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>d-piano — Progressive Loading Demo</title>
  <style>
    *, *::before, *::after { box-sizing: border-box; }

    body {
      font-family: system-ui, -apple-system, sans-serif;
      max-width: 720px;
      margin: 48px auto;
      padding: 0 24px;
      background: #f8f8f8;
      color: #1a1a1a;
    }

    h1 { margin: 0 0 4px; font-size: 24px; }
    .subtitle { color: #666; margin: 0 0 32px; font-size: 14px; }

    .card {
      background: white;
      border-radius: 10px;
      padding: 20px 24px;
      margin-bottom: 16px;
      box-shadow: 0 1px 4px rgba(0,0,0,.08);
    }

    .card h2 { margin: 0 0 16px; font-size: 14px; font-weight: 600; text-transform: uppercase; letter-spacing: .05em; color: #555; }

    /* Config */
    .config-row { display: flex; gap: 10px; align-items: flex-end; flex-wrap: wrap; }
    .config-row label { display: flex; flex-direction: column; gap: 5px; font-size: 13px; color: #555; }
    .config-row label span { font-weight: 500; }
    .config-row input { padding: 8px 10px; border: 1px solid #ddd; border-radius: 6px; font-size: 14px; width: 280px; outline: none; }
    .config-row input:focus { border-color: #2563eb; }
    .config-row select { padding: 8px 10px; border: 1px solid #ddd; border-radius: 6px; font-size: 14px; outline: none; }
    .btn { padding: 9px 18px; border: none; border-radius: 6px; cursor: pointer; font-size: 14px; font-weight: 500; transition: background .15s; }
    .btn-primary { background: #2563eb; color: white; }
    .btn-primary:hover { background: #1d4ed8; }
    .btn-primary:disabled { background: #93c5fd; cursor: default; }

    /* Phases */
    .phases { display: flex; flex-direction: column; gap: 0; }
    .phase { display: flex; align-items: center; gap: 14px; padding: 12px 0; border-bottom: 1px solid #f2f2f2; }
    .phase:last-child { border-bottom: none; }
    .dot { width: 11px; height: 11px; border-radius: 50%; background: #e0e0e0; flex-shrink: 0; transition: background .3s; }
    .dot.waiting  { background: #e0e0e0; }
    .dot.active   { background: #f59e0b; box-shadow: 0 0 0 3px rgba(245,158,11,.2); }
    .dot.done     { background: #22c55e; }
    .dot.skipped  { background: #a3e635; }
    .phase-text { flex: 1; font-size: 14px; color: #444; }
    .phase-time { font-size: 12px; color: #999; font-family: monospace; min-width: 60px; text-align: right; }

    /* Keys */
    .keys { display: flex; gap: 6px; flex-wrap: wrap; }
    .key {
      padding: 11px 14px;
      background: #f5f5f5;
      border: 1px solid #e0e0e0;
      border-radius: 7px;
      font-size: 13px;
      cursor: pointer;
      user-select: none;
      transition: background .1s, transform .08s;
    }
    .key:hover:not(:disabled) { background: #ebebeb; }
    .key:active:not(:disabled) { transform: translateY(1px); }
    .key:disabled { opacity: .35; cursor: default; }
    .key.playing { background: #dbeafe; border-color: #93c5fd; color: #1d4ed8; }

    /* Log */
    .log {
      margin-top: 16px;
      font-family: monospace;
      font-size: 12px;
      line-height: 1.6;
      color: #555;
      max-height: 140px;
      overflow-y: auto;
      background: #fafafa;
      border: 1px solid #eee;
      border-radius: 6px;
      padding: 10px 12px;
    }
    .log:empty::before { content: 'Events will appear here…'; color: #bbb; }
    .log-line { padding: 1px 0; }
    .log-line.hl { color: #2563eb; font-weight: 600; }
  </style>
</head>
<body>

<h1>d-piano</h1>
<p class="subtitle">Plays immediately at 1 velocity, upgrades to full quality in the background during browser idle time.</p>

<div class="card">
  <h2>Configuration</h2>
  <div class="config-row">
    <label>
      <span>Sample URL</span>
      <input id="sampleUrl" value="https://tambien.github.io/Piano/Salamander/" />
    </label>
    <label>
      <span>Target velocities</span>
      <select id="velocities">
        <option value="1">1 — no upgrade</option>
        <option value="4">4</option>
        <option value="8" selected>8</option>
        <option value="16">16</option>
      </select>
    </label>
    <button class="btn btn-primary" id="loadBtn" onclick="window.initPiano()">Load Piano</button>
  </div>
</div>

<div class="card">
  <h2>Loading progress</h2>
  <div class="phases">
    <div class="phase">
      <div class="dot waiting" id="dot1"></div>
      <div class="phase-text" id="txt1">Waiting to start</div>
      <div class="phase-time" id="t1"></div>
    </div>
    <div class="phase">
      <div class="dot waiting" id="dot2"></div>
      <div class="phase-text" id="txt2">—</div>
      <div class="phase-time" id="t2"></div>
    </div>
  </div>
</div>

<div class="card">
  <h2>Play</h2>
  <div class="keys" id="keys">
    <button class="key" disabled data-notes="C3">C3</button>
    <button class="key" disabled data-notes="E3">E3</button>
    <button class="key" disabled data-notes="G3">G3</button>
    <button class="key" disabled data-notes="C4">C4</button>
    <button class="key" disabled data-notes="E4">E4</button>
    <button class="key" disabled data-notes="G4">G4</button>
    <button class="key" disabled data-notes="C5">C5</button>
    <button class="key" disabled data-notes="E5">E5</button>
    <button class="key" disabled data-notes="G5">G5</button>
    <button class="key" disabled data-notes="C4,E4,G4">C major</button>
    <button class="key" disabled data-notes="G3,B3,D4">G major</button>
    <button class="key" disabled data-notes="A3,C4,E4">A minor</button>
    <button class="key" disabled data-notes="F3,A3,C4">F major</button>
  </div>
  <div class="log" id="log"></div>
</div>

<script src="https://unpkg.com/tone@latest/build/Tone.js"></script>
<script type="module">
  import { Piano } from './src/index.ts';

  let piano = null;
  let t0 = null;

  function elapsed() {
    return t0 ? `+${Date.now() - t0}ms` : '';
  }

  function log(msg, highlight = false) {
    const el = document.getElementById('log');
    const line = document.createElement('div');
    line.className = 'log-line' + (highlight ? ' hl' : '');
    line.textContent = `${elapsed().padEnd(9)} ${msg}`;
    el.appendChild(line);
    el.scrollTop = el.scrollHeight;
  }

  function setPhase(n, state, text, time) {
    document.getElementById(`dot${n}`).className = `dot ${state}`;
    document.getElementById(`txt${n}`).textContent = text;
    if (time != null) document.getElementById(`t${n}`).textContent = `${time}ms`;
  }

  // Wire up play keys
  document.getElementById('keys').addEventListener('click', async e => {
    const key = e.target.closest('.key');
    if (!key || key.disabled || !piano) return;
    await Tone.start();

    const notes = key.dataset.notes.split(',');
    notes.forEach(note => piano.keyDown({ note, velocity: 0.8 }));
    key.classList.add('playing');

    setTimeout(() => {
      notes.forEach(note => piano.keyUp({ note }));
      key.classList.remove('playing');
    }, 1500);
  });

  window.initPiano = async function () {
    const url = document.getElementById('sampleUrl').value.trim();
    const velocities = parseInt(document.getElementById('velocities').value);

    if (!url) { alert('Enter a sample URL first.'); return; }

    document.getElementById('loadBtn').disabled = true;
    document.getElementById('log').innerHTML = '';
    document.querySelectorAll('.key').forEach(k => k.disabled = true);
    t0 = Date.now();

    const phase2Label = velocities > 1
      ? `Upgrade to ${velocities} velocities (background)`
      : 'No upgrade needed (velocities = 1)';

    setPhase(1, 'active', 'Loading first pass (1 velocity)…', null);
    setPhase(2, 'waiting', phase2Label, null);
    log('Piano created');

    piano = new Piano({
      url,
      velocities,
      onLoadProgress: (progress) => {
        const current = Math.round(progress * velocities);
        if (progress < 1) {
          setPhase(2, 'active', `Loading velocities… (${current}/${velocities})`, null);
          log(`Velocity progress: ${current}/${velocities}`);
          return;
        }
        setPhase(2, 'done', `${velocities} velocities ready`, Date.now() - t0);
        log(`Background upgrade complete — now at full quality (${velocities} vel)`, true);
      },
    }).toDestination();

    await piano.load();

    const ms = Date.now() - t0;
    setPhase(1, 'done', 'First pass ready — playable now (1 velocity)', ms);
    log(`First pass ready — piano is playable`, true);

    if (velocities > 1) {
      setPhase(2, 'active', `Upgrading to ${velocities} velocities in background…`, null);
      log('Upgrade scheduled via requestIdleCallback');
    } else {
      setPhase(2, 'skipped', 'No upgrade (velocities = 1)', null);
    }

    document.querySelectorAll('.key').forEach(k => k.disabled = false);
    document.getElementById('loadBtn').disabled = false;
  };
</script>
</body>
</html>