chore(HTML): 更新 audio-visualization/2.html

This commit is contained in:
2026-07-05 21:36:30 +08:00
parent d3ccadba6e
commit bbf8c7a580

View File

@@ -10,6 +10,11 @@
--vfd-glow: #38f9d7; --vfd-glow: #38f9d7;
--vfd-dim: #0a6b5c; --vfd-dim: #0a6b5c;
--vfd-bg: #030807; --vfd-bg: #030807;
/* 与 canvas layout() 中的 pad / panelW 保持一致,供右侧 HTML 面板定位 */
--pad: max(24px, 4vw);
--panelW: max(180px, 18vw);
--vfd-dim-1: rgba(56, 249, 215, 0.14);
--vfd-dim-2: rgba(56, 249, 215, 0.5);
} }
* { * {
@@ -111,6 +116,72 @@
text-align: center; text-align: center;
transition: opacity .4s; transition: opacity .4s;
} }
/* 右侧数字状态面板HTML 形式,替代原 canvas 绘制) */
#statusPanel {
position: absolute;
top: calc(var(--pad) + 46px);
right: var(--pad);
bottom: calc(var(--pad) + 60px);
width: var(--panelW);
padding-left: 14px;
border-left: 1px solid var(--vfd-dim-1);
display: flex;
flex-direction: column;
justify-content: space-between;
z-index: 10;
pointer-events: none;
color: var(--vfd-glow);
}
.stat {
display: flex;
flex-direction: column;
gap: 4px;
}
.stat-label {
font-size: 13px;
letter-spacing: 1px;
color: var(--vfd-dim-2);
}
.stat-value {
font-size: 30px;
font-weight: 600;
line-height: 1;
color: var(--vfd-glow);
text-shadow: 0 0 12px var(--vfd-glow);
}
/* NOTE 音名 / 八度网格 */
.note-grid {
display: grid;
grid-template-columns: repeat(6, 1fr);
gap: 4px 2px;
margin-top: 4px;
}
.oct-grid {
display: grid;
grid-template-columns: repeat(9, 1fr);
gap: 2px;
margin-top: 6px;
}
.note-cell,
.oct-cell {
font-size: 18px;
font-weight: 600;
color: var(--vfd-dim-1);
transition: color .1s, text-shadow .1s;
}
.note-cell.active,
.oct-cell.active {
color: var(--vfd-glow);
text-shadow: 0 0 14px var(--vfd-glow);
}
</style> </style>
</head> </head>
<body> <body>
@@ -118,6 +189,31 @@
<canvas id="vfd"></canvas> <canvas id="vfd"></canvas>
<div id="scanlines"></div> <div id="scanlines"></div>
<div id="hint">按下 MIC 授权麦克风以开始</div> <div id="hint">按下 MIC 授权麦克风以开始</div>
<!-- 右侧数字状态面板HTML -->
<div id="statusPanel">
<div class="stat">
<span class="stat-label">TIME</span>
<span class="stat-value" id="stTime">--:--:--</span>
</div>
<div class="stat">
<span class="stat-label">PEAK (Hz)</span>
<span class="stat-value" id="stPeak">---</span>
</div>
<div class="stat">
<span class="stat-label">NOTE</span>
<div class="note-grid" id="stNoteGrid"></div>
<span class="stat-label" style="margin-top:8px">OCT</span>
<div class="oct-grid" id="stOctGrid"></div>
</div>
<div class="stat">
<span class="stat-label">LEVEL (dB)</span>
<span class="stat-value" id="stLevel">-inf</span>
</div>
<div class="stat">
<span class="stat-label">FFT</span>
<span class="stat-value" id="stFft">----</span>
</div>
</div>
<div id="controls"> <div id="controls">
<button class="btn" id="micBtn">MIC</button> <button class="btn" id="micBtn">MIC</button>
<button class="btn" id="fsBtn">FULL SCREEN</button> <button class="btn" id="fsBtn">FULL SCREEN</button>
@@ -134,6 +230,14 @@
const fsBtn = document.getElementById("fsBtn"); const fsBtn = document.getElementById("fsBtn");
const hint = document.getElementById("hint"); const hint = document.getElementById("hint");
// 右侧状态面板 HTML 元素
const elTime = document.getElementById("stTime");
const elPeak = document.getElementById("stPeak");
const elLevel = document.getElementById("stLevel");
const elFft = document.getElementById("stFft");
const elNoteGrid = document.getElementById("stNoteGrid");
const elOctGrid = document.getElementById("stOctGrid");
// VFD 荧光主色 // VFD 荧光主色
const GLOW = "#38f9d7"; const GLOW = "#38f9d7";
const DIM_1 = "rgba(56, 249, 215, 0.14)"; const DIM_1 = "rgba(56, 249, 215, 0.14)";
@@ -154,6 +258,7 @@
// ---------- 音频 ---------- // ---------- 音频 ----------
let audioCtx = null, analyser = null, freqData = null, timeData = null; let audioCtx = null, analyser = null, freqData = null, timeData = null;
let micStream = null; // 保存麦克风流以便关闭时停止音轨
let running = false; let running = false;
let sampleRate = 44100; // 采样率,用于频率/音符换算 let sampleRate = 44100; // 采样率,用于频率/音符换算
@@ -172,6 +277,7 @@
sampleRate = audioCtx.sampleRate; sampleRate = audioCtx.sampleRate;
freqData = new Uint8Array(analyser.frequencyBinCount); freqData = new Uint8Array(analyser.frequencyBinCount);
timeData = new Uint8Array(analyser.fftSize); timeData = new Uint8Array(analyser.fftSize);
micStream = stream;
running = true; running = true;
micBtn.classList.add("active"); micBtn.classList.add("active");
hint.style.opacity = "0"; hint.style.opacity = "0";
@@ -181,7 +287,29 @@
} }
} }
micBtn.addEventListener("click", initMic); // 关闭麦克风:停止音轨、释放音频上下文并复位状态
function stopMic() {
if (!running) return;
if (micStream) {
micStream.getTracks().forEach(t => t.stop());
micStream = null;
}
if (audioCtx) {
audioCtx.close();
audioCtx = null;
}
analyser = null;
running = false;
micBtn.classList.remove("active");
hint.textContent = "按下 MIC 授权麦克风以开始";
hint.style.opacity = "1";
}
// 点击 MIC在开启 / 关闭之间切换
micBtn.addEventListener("click", () => {
if (running) stopMic();
else initMic();
});
// ---------- 全屏 ---------- // ---------- 全屏 ----------
fsBtn.addEventListener("click", () => { fsBtn.addEventListener("click", () => {
@@ -229,7 +357,7 @@
drawSpectrum(); drawSpectrum();
drawWaveform(); drawWaveform();
drawLevelMeter(); drawLevelMeter();
drawStatusBar(); updateStatusPanel();
} }
// 屏幕布局参数 // 屏幕布局参数
@@ -433,10 +561,27 @@
return maxI * sampleRate / analyser.fftSize; return maxI * sampleRate / analyser.fftSize;
} }
// 右侧数字状态栏(时钟 / 主频 / 音符 / dB纵向排列的纯文字仪表读数 // 可显示的八度范围
function drawStatusBar() { const OCTAVES = [0, 1, 2, 3, 4, 5, 6, 7, 8];
const { pad, panelX, panelW, statusTop, statusH } = layout();
// 初始化 NOTE / OCT 网格单元(一次性创建,之后仅切换 active 类)
const noteCells = NOTE_NAMES.map(name => {
const el = document.createElement("span");
el.className = "note-cell";
el.textContent = name;
elNoteGrid.appendChild(el);
return el;
});
const octCells = OCTAVES.map(o => {
const el = document.createElement("span");
el.className = "oct-cell";
el.textContent = o;
elOctGrid.appendChild(el);
return el;
});
// 更新右侧 HTML 状态面板(时钟 / 主频 / 音符 / dB / FFT
function updateStatusPanel() {
// RMS → dB // RMS → dB
let db = -Infinity; let db = -Infinity;
if (running) { if (running) {
@@ -450,44 +595,23 @@
} }
const f = dominantFreq(); const f = dominantFreq();
const now = new Date();
const clock = now.toTimeString().slice(0, 8);
const cells = [ // 当前主频对应的半音索引0-11与八度无信号时为 -1
["TIME", clock], let activeNote = -1, activeOctave = -99;
["PEAK", f > 0 ? f.toFixed(0) + " Hz" : "--- Hz"], if (running && f > 0) {
["NOTE", running ? freqToNote(f) : "--"], const nn = Math.round(12 * Math.log2(f / 440) + 69);
["LEVEL", isFinite(db) ? db.toFixed(1) + " dB" : "-inf dB"], activeNote = ((nn % 12) + 12) % 12;
["FFT", running ? analyser.fftSize + "" : "----"] activeOctave = Math.floor(nn / 12) - 1;
]; }
ctx.save(); elTime.textContent = new Date().toTimeString().slice(0, 8);
// 左侧分隔竖线 elPeak.textContent = f > 0 ? f.toFixed(0) : "---";
ctx.strokeStyle = DIM_1; elLevel.textContent = isFinite(db) ? db.toFixed(1) : "-inf";
ctx.lineWidth = 1; elFft.textContent = running ? analyser.fftSize + "" : "----";
ctx.beginPath();
ctx.moveTo(panelX - 12, statusTop);
ctx.lineTo(panelX - 12, statusTop + statusH);
ctx.stroke();
ctx.textBaseline = "top"; // 高亮当前音符与八度
ctx.textAlign = "left"; noteCells.forEach((el, i) => el.classList.toggle("active", i === activeNote));
const cellH = statusH / cells.length; // 每项纵向占位 octCells.forEach((el, i) => el.classList.toggle("active", OCTAVES[i] === activeOctave));
cells.forEach((c, i) => {
const cy = statusTop + i * cellH;
// 标签
ctx.font = "13px Consolas, monospace";
ctx.fillStyle = DIM_2;
ctx.shadowBlur = 0;
ctx.fillText(c[0], panelX, cy);
// 数值(放大字号)
ctx.font = "600 30px Consolas, monospace";
ctx.fillStyle = GLOW;
ctx.shadowColor = GLOW;
ctx.shadowBlur = 12;
ctx.fillText(c[1], panelX, cy + 18);
});
ctx.restore();
} }
draw(); draw();