feat: voice print

app/components/voice-print/voice-print.tsx

@@ -1,4 +1,4 @@
-import { useEffect, useRef, useState } from "react";
+import { useEffect, useRef } from "react";
 import styles from "./voice-print.module.scss";
 
 interface VoicePrintProps {
@@ -8,76 +8,92 @@ interface VoicePrintProps {
 
 export function VoicePrint({ frequencies, isActive }: VoicePrintProps) {
   const canvasRef = useRef<HTMLCanvasElement>(null);
-  const [history, setHistory] = useState<number[][]>([]);
-  const historyLengthRef = useRef(10); // 保存10帧历史数据
+  const historyRef = useRef<number[][]>([]); // 存储历史频率数据，用于平滑处理
+  const historyLengthRef = useRef(10); // 历史数据保留帧数，影响平滑程度
+  const animationFrameRef = useRef<number>(); // 用于管理动画帧
+  const currentFrequenciesRef = useRef<Uint8Array>(); // 当前频率数据的引用
+  const amplitudeMultiplier = useRef(1.5); // 波形振幅倍数，控制波形高度
 
+  // 更新频率数据的副作用
   useEffect(() => {
+    if (!frequencies || !isActive) {
+      historyRef.current = [];
+      currentFrequenciesRef.current = undefined;
+      return;
+    }
+
+    currentFrequenciesRef.current = frequencies;
+    const freqArray = Array.from(frequencies);
+    const newHistory = [...historyRef.current, freqArray];
+    if (newHistory.length > historyLengthRef.current) {
+      newHistory.shift();
+    }
+    historyRef.current = newHistory;
+  }, [frequencies, isActive]);
+
+  // 渲染函数：负责绘制声纹动画
+  const render = () => {
     const canvas = canvasRef.current;
-    if (!canvas) return;
+    const frequencies = currentFrequenciesRef.current;
+
+    if (!canvas || !frequencies || !isActive) return;
 
     const ctx = canvas.getContext("2d");
     if (!ctx) return;
 
-    // 设置canvas尺寸
-    const dpr = window.devicePixelRatio || 1;
-    canvas.width = canvas.offsetWidth * dpr;
-    canvas.height = canvas.offsetHeight * dpr;
-    ctx.scale(dpr, dpr);
-
     // 清空画布
     ctx.clearRect(0, 0, canvas.width, canvas.height);
 
-    if (!frequencies || !isActive) {
-      setHistory([]); // 重置历史数据
-      return;
-    }
-
-    // 更新历史数据
-    const freqArray = Array.from(frequencies);
-    setHistory((prev) => {
-      const newHistory = [...prev, freqArray];
-      if (newHistory.length > historyLengthRef.current) {
-        newHistory.shift();
-      }
-      return newHistory;
-    });
-
-    // 绘制声纹
     const points: [number, number][] = [];
     const centerY = canvas.height / 2;
     const width = canvas.width;
-    const sliceWidth = width / (frequencies.length - 1);
 
-    // 绘制主波形
+    // 频率采样处理
+    // 将输入的频率数据重采样为128个点，减少计算量并保持显示效果
+    const frequencyStep = Math.ceil(frequencies.length / 128); // 计算采样间隔
+    const effectiveFrequencies = Array.from(
+      { length: 128 },
+      (_, i) => frequencies[i * frequencyStep] || 0,
+    );
+
+    // 计算每个频率点在画布上的水平间距
+    const sliceWidth = width / (effectiveFrequencies.length - 1);
+
     ctx.beginPath();
     ctx.moveTo(0, centerY);
 
-    // 使用历史数据计算平均值实现平滑效果
-    for (let i = 0; i < frequencies.length; i++) {
+    // 遍历采样后的频率数据，计算并绘制波形
+    for (let i = 0; i < effectiveFrequencies.length; i++) {
       const x = i * sliceWidth;
-      let avgFrequency = frequencies[i];
+      let avgFrequency = effectiveFrequencies[i];
 
-      // 计算历史数据的平均值
-      if (history.length > 0) {
-        const historicalValues = history.map((h) => h[i] || 0);
+      // 使用历史数据进行平滑处理
+      // 当前值权重为2，历史数据权重为1，实现平滑过渡
+      if (historyRef.current.length > 0) {
+        const historicalValues = historyRef.current.map(
+          (h) => h[i * frequencyStep] || 0,
+        );
         avgFrequency =
-          (avgFrequency + historicalValues.reduce((a, b) => a + b, 0)) /
-          (history.length + 1);
+          (avgFrequency * 2 + historicalValues.reduce((a, b) => a + b, 0)) /
+          (historyRef.current.length + 2);
       }
 
-      // 使用三角函数使波形更自然
-      const normalized = avgFrequency / 255.0;
-      const height = normalized * (canvas.height / 2);
-      const y = centerY + height * Math.sin(i * 0.2 + Date.now() * 0.002);
+      // 波形计算
+      const normalized = Math.pow(avgFrequency / 255.0, 1.1); // 使用幂函数增强对比度
+      const height =
+        normalized * (canvas.height / 2) * amplitudeMultiplier.current;
+      // 使用正弦函数创建波动效果，i * 0.15控制波形密度，Date.now() * 0.003控制波动速度
+      const y = centerY + height * Math.sin(i * 0.15 + Date.now() * 0.003);
 
       points.push([x, y]);
 
+      // 使用贝塞尔曲线绘制平滑波形
       if (i === 0) {
         ctx.moveTo(x, y);
       } else {
-        // 使用贝塞尔曲线使波形更平滑
         const prevPoint = points[i - 1];
         const midX = (prevPoint[0] + x) / 2;
+        // 二次贝塞尔曲线，使用中点作为控制点
         ctx.quadraticCurveTo(
           prevPoint[0],
           prevPoint[1],
@@ -87,7 +103,7 @@ export function VoicePrint({ frequencies, isActive }: VoicePrintProps) {
       }
     }
 
-    // 绘制对称的下半部分
+    // 绘制对称的下半部分波形，创建镜像效果
     for (let i = points.length - 1; i >= 0; i--) {
       const [x, y] = points[i];
       const symmetricY = centerY - (y - centerY);
@@ -107,15 +123,40 @@ export function VoicePrint({ frequencies, isActive }: VoicePrintProps) {
 
     ctx.closePath();
 
-    // 设置渐变色和透明度
+    // 创建水平渐变效果
     const gradient = ctx.createLinearGradient(0, 0, canvas.width, 0);
-    gradient.addColorStop(0, "rgba(100, 180, 255, 0.95)");
-    gradient.addColorStop(0.5, "rgba(140, 200, 255, 0.9)");
-    gradient.addColorStop(1, "rgba(180, 220, 255, 0.95)");
+    gradient.addColorStop(0, "rgba(100, 180, 255, 0.95)"); // 左侧颜色
+    gradient.addColorStop(0.5, "rgba(140, 200, 255, 0.9)"); // 中间颜色
+    gradient.addColorStop(1, "rgba(180, 220, 255, 0.95)"); // 右侧颜色
 
     ctx.fillStyle = gradient;
     ctx.fill();
-  }, [frequencies, isActive, history]);
+
+    animationFrameRef.current = requestAnimationFrame(render);
+  };
+
+  // 初始化canvas和动画循环
+  useEffect(() => {
+    const canvas = canvasRef.current;
+    if (!canvas) return;
+
+    // 处理高DPI显示器
+    const dpr = window.devicePixelRatio || 1;
+    canvas.width = canvas.offsetWidth * dpr;
+    canvas.height = canvas.offsetHeight * dpr;
+
+    const ctx = canvas.getContext("2d");
+    if (!ctx) return;
+    ctx.scale(dpr, dpr);
+
+    render();
+
+    return () => {
+      if (animationFrameRef.current) {
+        cancelAnimationFrame(animationFrameRef.current);
+      }
+    };
+  }, []);
 
   return (
     <div className={styles["voice-print"]}>