test/recorder.html at main · nukelon/test · GitHub

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<!doctype html>
<html lang="zh-CN">
<head>
  <meta charset="utf-8" />
  <meta name="viewport" content="width=device-width,initial-scale=1" />
  <title>录音 + 实时波形（单文件）</title>
  <style>
    :root{
      --bg:#0f1220; --card:#161a2b; --text:#e8ecff; --muted:#9aa0b8;
      --accent:#6ea2ff; --accent-2:#8bffd6; --danger:#ff5d73;
    }
    *{box-sizing:border-box}
    html,body{height:100%}
    body{
      margin:0; font:16px/1.4 system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial;
      background:radial-gradient(1200px 600px at 20% -10%, #1b2040 0, transparent 60%),
                 radial-gradient(900px 500px at 120% 10%, #1b4038 0, transparent 60%),
                 var(--bg); color:var(--text);
      display:flex; align-items:center; justify-content:center; padding:24px;
    }
    .app{
      width:min(920px, 100%); background:color-mix(in oklab, var(--card) 92%, #000 8%);
      border:1px solid rgba(255,255,255,.06); border-radius:16px; padding:20px 18px 22px;
      box-shadow:0 20px 60px rgba(0,0,0,.4), inset 0 1px 0 rgba(255,255,255,.06);
      backdrop-filter: blur(6px);
    }
    header{display:flex; align-items:center; gap:12px; margin-bottom:12px;}
    header h1{font-size:18px; margin:0; letter-spacing:.2px}
    header .status{margin-left:auto; font-size:13px; color:var(--muted)}
    .row{display:flex; flex-wrap:wrap; gap:10px; align-items:center; margin:12px 0}
    button{
      appearance:none; border:1px solid rgba(255,255,255,.08); background:#1e243b; color:var(--text);
      padding:10px 14px; border-radius:10px; font-weight:600; letter-spacing:.2px; cursor:pointer;
      transition:.2s transform, .2s opacity, .2s background;
    }
    button:hover{transform:translateY(-1px)}
    button:disabled{opacity:.45; cursor:not-allowed}
    .primary{background:linear-gradient(180deg, #2b6cff, #234fdd);}
    .danger{background:linear-gradient(180deg, #ff6b81, #e14660); border-color:transparent}
    .ghost{background:#1a1f33}
    .pill{
      padding:6px 10px; border-radius:999px; font-size:12px; font-weight:700;
      border:1px solid rgba(255,255,255,.1); color:var(--muted); background:#11162a;
    }
    .led{display:inline-flex; align-items:center; gap:8px}
    .dot{
      width:8px; height:8px; border-radius:999px; background:var(--muted);
      box-shadow:0 0 0 0 rgba(255,93,115,0); transition:.25s;
    }
    .dot.rec{background:var(--danger); box-shadow:0 0 0 6px rgba(255,93,115,.15)}
    .timer{font-variant-numeric:tabular-nums}
    canvas{
      width:100%; height:220px; display:block; border-radius:12px;
      background:linear-gradient(180deg, #0c1022, #0a0e1c);
      box-shadow:inset 0 0 0 1px rgba(255,255,255,.06), 0 12px 40px rgba(0,0,0,.35);
    }
    .hint{font-size:12px; color:var(--muted); margin-top:8px}
    audio{width:100%; margin-top:12px}
    a.download{display:inline-block; margin-top:10px; font-size:14px; color:var(--accent); text-decoration:none}
    .right{margin-left:auto}
  </style>
</head>
<body>
  <div class="app">
    <header>
      <h1>🎙️ 录音与波形</h1>
      <span class="status">需要在 HTTPS 或 localhost 上运行</span>
    </header>

    <div class="row">
      <button id="btnStart" class="primary">开始录音</button>
      <button id="btnPause" class="ghost" disabled>暂停</button>
      <button id="btnResume" class="ghost" disabled>继续</button>
      <button id="btnStop" class="danger" disabled>停止</button>
      <span class="right pill led"><span id="dot" class="dot"></span><span id="state">空闲</span></span>
      <span class="pill"><span id="timer" class="timer">00:00</span></span>
    </div>

    <canvas id="scope" aria-label="实时波形"></canvas>

    <audio id="player" controls preload="metadata"></audio>
    <div class="row" style="margin-top:6px">
      <a id="download" class="download" href="#" download style="display:none">⬇️ 下载录音</a>
      <span id="filesize" class="hint"></span>
    </div>

    <p class="hint">
      提示：点击“开始录音”后会显示实时波形；“停止”后可回放并下载录音。回放时波形也会随声音变化。
    </p>
  </div>

<script>
(() => {
  const $ = sel => document.querySelector(sel);
  const btnStart = $('#btnStart');
  const btnPause = $('#btnPause');
  const btnResume = $('#btnResume');
  const btnStop = $('#btnStop');
  const stateEl = $('#state');
  const dotEl = $('#dot');
  const timerEl = $('#timer');
  const canvas = $('#scope');
  const audioEl = $('#player');
  const dl = $('#download');
  const fsEl = $('#filesize');

  let mediaRecorder, chunks = [], recStartTs = 0, timerId = null;
  let stream = null;
  let ac = null, analyser = null, dataArray = null, bufferLen = 0;
  let drawReq = 0;
  let micSource = null;
  let playerSource = null;
  let currentVisual = 'idle'; // 'mic' | 'player' | 'idle'
  let chosenMime = '';

  // HiDPI canvas sizing
  function resizeCanvas(){
    const dpr = Math.max(1, window.devicePixelRatio || 1);
    const w = canvas.clientWidth;
    const h = canvas.clientHeight;
    canvas.width = Math.floor(w * dpr);
    canvas.height = Math.floor(h * dpr);
  }
  window.addEventListener('resize', resizeCanvas, {passive:true});
  resizeCanvas();

  function ensureAudioGraph(){
    if (!ac) ac = new (window.AudioContext || window.webkitAudioContext)();
    if (!analyser){
      analyser = ac.createAnalyser();
      analyser.fftSize = 2048;
      analyser.smoothingTimeConstant = 0.85;
      bufferLen = analyser.fftSize;
      dataArray = new Uint8Array(bufferLen);
    }
  }

  function pickMime(){
    const cand = [
      'audio/webm;codecs=opus',
      'audio/webm',
      'audio/ogg;codecs=opus',
      'audio/mp4;codecs=mp4a.40.2',
      'audio/mp4'
    ];
    for (const m of cand){
      if (MediaRecorder.isTypeSupported?.(m)) return m;
    }
    return ''; // browser picks default
  }

  function setUIRecording(active){
    btnStart.disabled = active;
    btnPause.disabled = !active;
    btnStop.disabled = !active;
    btnResume.disabled = true;
    stateEl.textContent = active ? '录音中' : '空闲';
    dotEl.classList.toggle('rec', !!active);
  }

  function setUIPaused(paused){
    btnPause.disabled = paused;
    btnResume.disabled = !paused;
    stateEl.textContent = paused ? '已暂停' : '录音中';
    dotEl.classList.toggle('rec', !paused);
  }

  function formatTime(ms){
    const sec = Math.max(0, Math.floor(ms/1000));
    const m = String(Math.floor(sec/60)).padStart(2,'0');
    const s = String(sec%60).padStart(2,'0');
    return `${m}:${s}`;
  }

  function startTimer(){
    stopTimer();
    timerId = setInterval(() => {
      timerEl.textContent = formatTime(Date.now() - recStartTs);
    }, 250);
  }
  function stopTimer(){
    if (timerId){ clearInterval(timerId); timerId = null; }
  }

  function connectMicToAnalyser(){
    if (!stream) return;
    ensureAudioGraph();
    if (micSource) try{ micSource.disconnect(); }catch{}
    micSource = ac.createMediaStreamSource(stream);
    micSource.connect(analyser);
    currentVisual = 'mic';
    // Do not connect to destination to avoid feedback
  }

  function connectPlayerToAnalyser(){
    ensureAudioGraph();
    if (!playerSource){
      playerSource = ac.createMediaElementSource(audioEl);
    } else {
      try{ playerSource.disconnect(); }catch{}
    }
    const gain = ac.createGain();
    gain.gain.value = 1; // normal volume
    playerSource.connect(analyser);
    analyser.connect(gain).connect(ac.destination);
    audioEl.muted = true; // avoid "双重播放"
    currentVisual = 'player';
  }

  function disconnectAnalyser(){
    try{ micSource?.disconnect(); }catch{}
    micSource = null;
    try{ playerSource?.disconnect(); }catch{}
    // Keep analyser alive for next session
    currentVisual = 'idle';
  }

  function draw(){
    cancelAnimationFrame(drawReq);
    const ctx = canvas.getContext('2d');
    const dpr = Math.max(1, window.devicePixelRatio || 1);
    const W = canvas.width, H = canvas.height;

    function render(){
      drawReq = requestAnimationFrame(render);

      // background
      ctx.clearRect(0,0,W,H);
      const grad = ctx.createLinearGradient(0,0,0,H);
      grad.addColorStop(0,'#0b1024'); grad.addColorStop(1,'#0a0e1c');
      ctx.fillStyle = grad;
      ctx.fillRect(0,0,W,H);

      // grid lines
      ctx.globalAlpha = .22;
      ctx.strokeStyle = '#253055';
      ctx.lineWidth = 1 * dpr;
      ctx.beginPath();
      const rows = 4, cols = 24;
      for (let i=1;i<rows;i++){
        const y = (H/rows)*i|0; ctx.moveTo(0,y); ctx.lineTo(W,y);
      }
      for (let i=1;i<cols;i++){
        const x = (W/cols)*i|0; ctx.moveTo(x,0); ctx.lineTo(x,H);
      }
      ctx.stroke();
      ctx.globalAlpha = 1;

      // zero axis
      ctx.strokeStyle = 'rgba(255,255,255,.09)';
      ctx.beginPath(); ctx.moveTo(0, H/2); ctx.lineTo(W, H/2); ctx.stroke();

      if (!analyser || currentVisual === 'idle') return;

      analyser.getByteTimeDomainData(dataArray);

      // waveform
      ctx.lineWidth = 2 * dpr;
      // main stroke
      ctx.strokeStyle = '#8bffd6';
      ctx.beginPath();
      const slice = W / bufferLen;
      for (let i=0;i<bufferLen;i++){
        const v = dataArray[i] / 128.0; // 0..255 -> -1..1 -> 0..2
        const y = (v * H/2);
        const x = i * slice;
        if (i===0) ctx.moveTo(x,y); else ctx.lineTo(x,y);
      }
      ctx.stroke();

      // glow overlay
      ctx.globalAlpha = .65;
      ctx.strokeStyle = '#6ea2ff';
      ctx.lineWidth = 1.2 * dpr;
      ctx.stroke();
      ctx.globalAlpha = 1;
    }
    render();
  }

  async function startRecording(){
    if (!navigator.mediaDevices?.getUserMedia){
      alert('此浏览器不支持 getUserMedia。请使用新版 Chrome/Edge/Firefox/Safari。');
      return;
    }
    try{
      stream = await navigator.mediaDevices.getUserMedia({
        audio: {
          channelCount: 1,
          echoCancellation: true,
          noiseSuppression: true,
          autoGainControl: true
        }
      });
    }catch(err){
      console.error(err);
      alert('无法获取麦克风权限：' + (err.message || err));
      return;
    }

    ensureAudioGraph();
    connectMicToAnalyser();
    draw();

    chosenMime = pickMime();
    try{
      mediaRecorder = new MediaRecorder(stream, chosenMime ? {mimeType: chosenMime} : undefined);
    }catch(e){
      console.warn('MediaRecorder 创建失败，尝试无 MIME：', e);
      mediaRecorder = new MediaRecorder(stream);
    }

    chunks = [];
    mediaRecorder.ondataavailable = e => { if (e.data && e.data.size > 0) chunks.push(e.data); };
    mediaRecorder.onstart = () => {
      recStartTs = Date.now();
      startTimer();
      setUIRecording(true);
    };
    mediaRecorder.onpause = () => setUIPaused(true);
    mediaRecorder.onresume = () => setUIPaused(false);

    mediaRecorder.onstop = async () => {
      stopTimer();
      timerEl.textContent = '00:00';
      setUIRecording(false);

      // Build blob & URL
      const type = chosenMime || (chunks[0]?.type || 'audio/webm');
      const blob = new Blob(chunks, {type});
      const url = URL.createObjectURL(blob);
      audioEl.src = url;
      audioEl.load();

      // filename & download
      const ext = type.includes('mp4') ? '.m4a' :
                  type.includes('ogg') ? '.ogg' :
                  '.webm';
      const name = 'recording_' + new Date().toISOString().replace(/[:.]/g,'-') + ext;
      dl.href = url; dl.download = name; dl.style.display = 'inline-block';
      fsEl.textContent = `（文件大小：${(blob.size/1024/1024).toFixed(2)} MB）`;

      // release mic
      try{ stream.getTracks().forEach(t => t.stop()); }catch{}
      stream = null;
      disconnectAnalyser();

      // enable visual on playback
      audioEl.onplay = () => connectPlayerToAnalyser();
      audioEl.onpause = () => { /* keep analyser for scrub visuals */ };
      audioEl.onended = () => { /* keep graph */ };
    };

    mediaRecorder.start(100); // gather data every 100ms
  }

  function pauseRecording(){
    if (mediaRecorder?.state === 'recording') mediaRecorder.pause();
  }
  function resumeRecording(){
    if (mediaRecorder?.state === 'paused') mediaRecorder.resume();
  }
  function stopRecording(){
    if (mediaRecorder && (mediaRecorder.state === 'recording' || mediaRecorder.state === 'paused')){
      mediaRecorder.stop();
    }
    setTimeout(() => { // small delay to ensure `onstop` ran
      stateEl.textContent = '已停止';
      dotEl.classList.remove('rec');
    }, 50);
    // keep canvas running to keep last frame / later playback visuals
  }

  // wire up UI
  btnStart.addEventListener('click', startRecording);
  btnPause.addEventListener('click', pauseRecording);
  btnResume.addEventListener('click', resumeRecording);
  btnStop.addEventListener('click', stopRecording);

  // accessibility: space toggles pause/resume while recording
  window.addEventListener('keydown', (e) => {
    if (e.code === 'Space'){
      if (mediaRecorder?.state === 'recording'){ pauseRecording(); }
      else if (mediaRecorder?.state === 'paused'){ resumeRecording(); }
    }
  });

  // start the painter
  draw();
})();
</script>
</body>
</html>