feat: 扩展 WebRTC 统计信息

在 StatsBar 中新增延迟、抖动、丢帧、解码耗时、上传速率和丢包率等指标展示。
重构速率计算逻辑，并从 inbound-rtp 和 candidate-pair 报告中提取相关数据。

WebRTCControllerWeb/src/components/StatsBar.vue

@@ -6,8 +6,14 @@ import { store } from '../store/controllerStore';
   <div class="stats-bar">
     <span>分辨率: <b>{{ store.stats ? store.stats.width + '×' + store.stats.height : '-' }}</b></span>
     <span>帧率: <b>{{ store.stats ? store.stats.fps : '-' }}</b></span>
-    <span>解码: <b>{{ store.stats ? store.stats.codec : '-' }}</b></span>
+    <span>编码: <b>{{ store.stats ? store.stats.codec : '-' }}</b></span>
+    <span>延迟: <b>{{ store.stats ? store.stats.latency : '-' }}</b></span>
+    <span>抖动: <b>{{ store.stats ? store.stats.jitter : '-' }}</b></span>
+    <span>丢帧: <b>{{ store.stats ? store.stats.framesDropped : '-' }}</b></span>
+    <span>解码耗时: <b>{{ store.stats ? store.stats.decodeMs : '-' }}</b></span>
+    <span>↑上传: <b>{{ store.stats ? store.stats.upSpeed : '-' }}</b></span>
     <span>↓下载: <b>{{ store.stats ? store.stats.downSpeed : '-' }}</b></span>
+    <span>丢包: <b>{{ store.stats ? store.stats.packetLoss : '-' }}</b></span>
     <span>时长: <b>{{ store.stats ? store.stats.duration : '-' }}</b></span>
     <span>控制通道: <b>{{ store.dataChannelOpen ? '已连接' : '未连接' }}</b></span>
     <span>目标: <b>{{ store.targetDeviceId || '-' }}</b></span>

WebRTCControllerWeb/src/services/WebRtcController.js

@@ -23,6 +23,8 @@ export class WebRtcController {
     this._statsTimer = null;
     this._prevBytes = 0;
     this._prevTs = 0;
+    this._prevSentBytes = 0;
+    this._prevSentTs = 0;
     this._connectedAt = 0;
     this._gatheredRelay = false;
     this._gatheredSrflx = false;
@@ -239,7 +241,10 @@ export class WebRtcController {
 
   async collectStats() {
     const stats = await this.pc.getStats();
-    let width = '-', height = '-', fps = '-', codec = '-', bytesReceived = 0;
+    let width = '-', height = '-', fps = '-', codec = '-';
+    let bytesReceived = 0, bytesSent = 0;
+    let jitter = 0, framesDropped = 0, packetsLost = 0, packetsReceived = 0;
+    let framesDecoded = 0, totalDecodeTime = 0, rtt = null;
     const codecs = {};
     stats.forEach((r) => {
       if (r.type === 'inbound-rtp' && r.kind === 'video') {
@@ -247,30 +252,63 @@ export class WebRtcController {
         height = r.frameHeight ?? '-';
         fps = r.framesPerSecond ?? '-';
         if (r.codecId && codecs[r.codecId]) codec = codecs[r.codecId];
+        jitter = r.jitter ?? 0;                  // 接收抖动（秒）
+        framesDropped = r.framesDropped ?? 0;     // 累计丢帧数
+        packetsLost = r.packetsLost ?? 0;         // 累计丢包数
+        packetsReceived = r.packetsReceived ?? 0; // 累计接收包数
+        framesDecoded = r.framesDecoded ?? 0;     // 累计解码帧数
+        totalDecodeTime = r.totalDecodeTime ?? 0; // 累计解码耗时（秒）
       } else if (r.type === 'codec' && r.mimeType && r.mimeType.startsWith('video/')) {
         codecs[r.id] = r.mimeType.substring(6);
       } else if (r.type === 'candidate-pair' && r.nominated) {
         bytesReceived = r.bytesReceived ?? 0;
+        bytesSent = r.bytesSent ?? 0;
+        if (typeof r.currentRoundTripTime === 'number') rtt = r.currentRoundTripTime; // 往返时延（秒）
       }
     });
     const now = Date.now();
+    // 下载速率
     let downSpeed = '-';
     if (this._prevTs) {
       const dt = (now - this._prevTs) / 1000;
       if (dt > 0) {
         const bps = (bytesReceived - this._prevBytes) / dt;
-        downSpeed = bps >= 1048576 ? (bps / 1048576).toFixed(1) + ' MB/s'
-          : bps >= 1024 ? (bps / 1024).toFixed(1) + ' KB/s' : bps.toFixed(0) + ' B/s';
+        downSpeed = formatSpeed(bps);
       }
     }
     this._prevBytes = bytesReceived;
     this._prevTs = now;
+    // 上传速率
+    let upSpeed = '-';
+    if (this._prevSentTs) {
+      const dt = (now - this._prevSentTs) / 1000;
+      if (dt > 0) {
+        const bps = (bytesSent - this._prevSentBytes) / dt;
+        upSpeed = formatSpeed(bps);
+      }
+    }
+    this._prevSentBytes = bytesSent;
+    this._prevSentTs = now;
     let duration = '-';
     if (this._connectedAt) {
       const secs = Math.floor((now - this._connectedAt) / 1000);
       duration = String(Math.floor(secs / 60)).padStart(2, '0') + ':' + String(secs % 60).padStart(2, '0');
     }
-    return { width, height, fps, codec, downSpeed, duration, dcState: this.dataChannel ? this.dataChannel.readyState : 'none' };
+    // 延迟（往返时延）
+    const latency = rtt != null ? (rtt * 1000).toFixed(0) + ' ms' : '-';
+    // 抖动
+    const jitterMs = jitter ? (jitter * 1000).toFixed(1) + ' ms' : '-';
+    // 解码耗时（平均每帧解码时间）
+    const decodeMs = (framesDecoded > 0 && totalDecodeTime > 0)
+      ? (totalDecodeTime / framesDecoded * 1000).toFixed(1) + ' ms' : '-';
+    // 丢包率
+    const totalPackets = packetsLost + packetsReceived;
+    const lossRate = totalPackets > 0 ? (packetsLost / totalPackets * 100).toFixed(1) + '%' : '-';
+    return {
+      width, height, fps, codec, downSpeed, upSpeed, duration,
+      latency, jitter: jitterMs, framesDropped, decodeMs, packetLoss: lossRate,
+      dcState: this.dataChannel ? this.dataChannel.readyState : 'none',
+    };
   }
 
   async close() {
@@ -283,3 +321,10 @@ export class WebRtcController {
     this._pendingCandidates = [];
   }
 }
+
+// 将字节/秒格式化为可读速率
+function formatSpeed(bps) {
+  if (!bps || bps <= 0) return '0 B/s';
+  return bps >= 1048576 ? (bps / 1048576).toFixed(1) + ' MB/s'
+    : bps >= 1024 ? (bps / 1024).toFixed(1) + ' KB/s' : bps.toFixed(0) + ' B/s';
+}