修复工作

rtsp-vue/src/views/video/device/component/jpegPlayer.vue

@@ -0,0 +1,176 @@
+<template>
+  <div style="position: absolute;height: 100%;width: 100%;display: flex;align-items: center;justify-content: center;">
+    <div v-show="isPlay" style="width: 100%; height: 100%; position: relative;">
+      <canvas ref="canvas" style="width: 100%; height: 100%; object-fit: contain;"></canvas>
+      <div class="stats" v-if="showStats">
+        FPS: {{ fps }} | 延迟: {{ latency }}ms | 帧数: {{ frameCount }}
+      </div>
+    </div>
+    <div v-show="!isPlay" style="color: #08979C;font-size: 25px;">暂无视频源</div>
+  </div>
+</template>
+
+<script>
+export default {
+  name: 'JpegPlayer',
+  data() {
+    return {
+      isPlay: false,
+      ws: null,
+      canvas: null,
+      ctx: null,
+      frameCount: 0,
+      fps: 0,
+      latency: 0,
+      showStats: true,
+      lastFrameTime: 0,
+      fpsCounter: 0,
+      fpsTimer: null
+    };
+  },
+  mounted() {
+    this.canvas = this.$refs.canvas;
+    this.ctx = this.canvas.getContext('2d');
+    
+    // 启动 FPS 计算定时器
+    this.fpsTimer = setInterval(() => {
+      this.fps = this.fpsCounter;
+      this.fpsCounter = 0;
+    }, 1000);
+  },
+  methods: {
+    createPlayer(url) {
+      if (!url) {
+        console.error('❌ 播放地址为空');
+        return;
+      }
+
+      // 检查是否是 WebSocket URL
+      if (!url.startsWith('ws://') && !url.startsWith('wss://')) {
+        console.error('❌ JpegPlayer 只支持 WebSocket URL');
+        return;
+      }
+
+      console.log('🎬 创建 JPEG WebSocket 播放器');
+      console.log('📺 WebSocket URL:', url);
+
+      // 关闭旧连接
+      if (this.ws) {
+        this.ws.close();
+      }
+
+      this.isPlay = true;
+      this.frameCount = 0;
+
+      // 创建 WebSocket 连接
+      this.ws = new WebSocket(url);
+      this.ws.binaryType = 'arraybuffer';
+
+      this.ws.onopen = () => {
+        console.log('✅ WebSocket 连接已建立');
+        this.lastFrameTime = Date.now();
+      };
+
+      this.ws.onmessage = (event) => {
+        this.handleFrame(event.data);
+      };
+
+      this.ws.onerror = (error) => {
+        console.error('❌ WebSocket 错误:', error);
+      };
+
+      this.ws.onclose = () => {
+        console.log('⚠️  WebSocket 连接已关闭');
+        this.isPlay = false;
+      };
+    },
+
+    handleFrame(data) {
+      try {
+        this.frameCount++;
+        this.fpsCounter++;
+        
+        // 计算延迟
+        const now = Date.now();
+        this.latency = now - this.lastFrameTime;
+        this.lastFrameTime = now;
+
+        // 将 ArrayBuffer 转换为 Blob
+        const blob = new Blob([data], { type: 'image/jpeg' });
+        const url = URL.createObjectURL(blob);
+
+        // 创建图片对象
+        const img = new Image();
+        img.onload = () => {
+          // 调整 canvas 尺寸
+          if (this.canvas.width !== img.width || this.canvas.height !== img.height) {
+            this.canvas.width = img.width;
+            this.canvas.height = img.height;
+            console.log('📐 Canvas 尺寸:', img.width, 'x', img.height);
+          }
+
+          // 绘制图片
+          this.ctx.drawImage(img, 0, 0);
+          
+          // 释放 URL
+          URL.revokeObjectURL(url);
+
+          // 只在前几帧输出日志
+          if (this.frameCount <= 3 || this.frameCount % 100 === 0) {
+            console.log(`📹 接收帧 #${this.frameCount}: ${data.byteLength} bytes, 分辨率: ${img.width}x${img.height}`);
+          }
+        };
+        img.onerror = () => {
+          console.error('❌ 图片解码失败');
+          URL.revokeObjectURL(url);
+        };
+        img.src = url;
+
+      } catch (error) {
+        console.error('❌ 处理帧数据失败:', error);
+      }
+    },
+
+    changeVideo(url) {
+      this.createPlayer(url);
+    },
+
+    closePlayer() {
+      this.isPlay = false;
+      if (this.ws) {
+        this.ws.close();
+        this.ws = null;
+      }
+      
+      if (this.fpsTimer) {
+        clearInterval(this.fpsTimer);
+        this.fpsTimer = null;
+      }
+      
+      // 清空 canvas
+      if (this.ctx) {
+        this.ctx.clearRect(0, 0, this.canvas.width, this.canvas.height);
+      }
+    }
+  },
+
+  beforeDestroy() {
+    this.closePlayer();
+  }
+};
+</script>
+
+<style scoped>
+.stats {
+  position: absolute;
+  top: 10px;
+  left: 10px;
+  background: rgba(0, 0, 0, 0.7);
+  color: #00ff00;
+  padding: 5px 10px;
+  border-radius: 4px;
+  font-size: 12px;
+  font-family: monospace;
+  z-index: 100;
+}
+</style>