ISMS-Visualization-BJGD-TKT-JCDJ/src/views/recognize/components/VideoLocalWindow.vue

<template>
  <div class="videoContainer">
    <video ref="video" autoplay muted playsinline></video>
    <div id="timestamp" v-show="false">
      {{ datetimeData.date + " " + datetimeData.time }}
    </div>
    <!-- <el-button @click="startCamera">开启摄像头</el-button>
    <el-button @click="stopCamera" :disabled="!isCameraActive"
      >关闭摄像头</el-button
    > -->
  </div>
</template>


<script>
import { GetPersonByFace, GetPersonByFaceBase64 } from "@/API/custom";
import Dayjs from "dayjs";

export default {
  props: {
    processStep: {
      type: String,
      require: true,
    },
    isUpload: {
      type: String,
      require: false,
    },
    cameraData: {
      type: Object,
      default: () => ({}),
    },
  },
  watch: {
    processStep: {
      handler(step) {
        if (step == 0 || step == 9) {
          this.startCamera();
        } else {
          this.stopCamera();
        }
      },
      deep: true,
      immediate: true,
    },
    isUpload: {
      handler(val) {
        console.log("上传子级开关", val);
        if (val) {
          this.uploadImage();
        } else {
          this.isUpload = false;
        }
      },
      deep: true,
      immediate: true,
    },
  },
  data() {
    return {
      isCameraActive: false,
      stream: null,
      captureInterval: null, // 新增定时器变量
      datetimeData: {
        date: Dayjs(new Date()).format("YYYY-MM-DD"),
        time: Dayjs(new Date()).format("HH:mm:ss"),
        week: Dayjs(new Date()).format("dddd"),
      },
    };
  },
  methods: {
    refreshTime() {
      let speed = 1000;
      let timer = null;
      let theNowTime = () => {
        // this.datePersonData.time = Dayjs(new Date()).format('HH:mm:ss')
        this.datetimeData.time = Dayjs(new Date()).format("HH:mm:ss");
        this.datetimeData.date = Dayjs(new Date()).format("YYYY-MM-DD");
        this.datetimeData.week = Dayjs(new Date()).format("dddd");
      };
      timer = setInterval(theNowTime, speed);
      this.$once("hook:beforeDestroy", () => {
        clearInterval(timer);
        timer = null;
      });
    },
    async startCamera() {
      try {
        const stream = await navigator.mediaDevices.getUserMedia({
          video: {
            width: { ideal: 1280 },
            height: { ideal: 800 },
            facingMode: "user",
          },
        });
        this.stream = stream;
        this.isCameraActive = true;
        this.$refs.video.srcObject = stream;

        if (this.isUpload) {
          setTimeout(() => {
            this.uploadImage();
          }, 1000);
        } else {
          // 新增定时截图功能
          this.captureInterval = setInterval(() => {
            this.captureImage();
            console.log("截图上传");
          }, 2500);
        }
      } catch (err) {
        console.error("摄像头访问错误:", err);
        alert(`摄像头访问失败: ${err.message}`);
      }
    },
    stopCamera() {
      if (this.stream) {
        this.stream.getTracks().forEach((track) => track.stop());
        this.isCameraActive = false;
        this.$refs.video.srcObject = null;
        this.stream = null;

        // 停止定时器
        if (this.captureInterval) {
          clearInterval(this.captureInterval);
          this.captureInterval = null;
        }
      }
    },
    // 新增截图方法
    // async captureImage() {
    //   const video = this.$refs.video;
    //   video.currentTime = 1;
    //   const canvas = document.createElement("canvas");
    //   canvas.width = video.videoWidth;
    //   canvas.height = video.videoHeight;
    //   canvas
    //     .getContext("2d")
    //     .drawImage(video, 0, 0, canvas.width, canvas.height);
    //   // 下载到本地
    //   // const link = document.createElement("a");
    //   // link.download = `capture_${new Date()
    //   //   .toISOString()
    //   //   .replace(/[:.]/g, "-")}.png`;
    //   // link.href = canvas.toDataURL("image/png");
    //   // link.click();

    //   // 将canvas转为Blob对象
    //   canvas.toBlob(async (blob) => {
    //     if (blob) {
    //       console.log("blob数据", blob);
    //       const formData = new FormData();
    //       formData.append("timestamp", new Date().toISOString());
    //       formData.append("file", blob, "screenshot.png");
    //       console.log("上传数据", formData);
    //       try {
    //         // const res = await GetPersonByFace(formData);
    //         // console.log("上传反馈", res);
    //         // const response = await fetch("System/Person/GetPersonByFace", {
    //         //   method: "POST",
    //         //   body: formData,
    //         // });
    //       } catch (err) {
    //         console.error("上传过程中出错:", err);
    //       }
    //     }
    //   }, "image/png");
    // },

    async captureImage() {
      const video = this.$refs.video;
      if (video.paused) return;
      const canvas = document.createElement("canvas");

      const cropWidth = video.videoWidth * 0.5;
      const cropHeight = video.videoHeight * 0.98;

      // 设置canvas尺寸为选择区域大小
      canvas.width = cropWidth;
      canvas.height = cropHeight;

      const x = (video.videoWidth - cropWidth) / 2;
      const y = (video.videoHeight - cropHeight) / 2;

      const ctx = canvas.getContext("2d");
      //中心60%区域
      ctx.drawImage(
        video,
        x,
        y,
        cropWidth,
        cropHeight,
        0,
        0,
        cropWidth,
        cropHeight
      );
      // canvas.width = video.videoWidth;
      // canvas.height = video.videoHeight;
      // const ctx = canvas.getContext("2d");
      // ctx.drawImage(video, 0, 0, canvas.width, canvas.height);
      try {
        const base64Data = canvas.toDataURL("image/png");
        // console.log("上传数据：Base64", base64Data);
        // 替换YOUR_SERVER_URL为你的实际服务器地址
        const response = await fetch(
          "/yapi/System/Person/GetPersonByFaceBase64",
          {
            method: "POST",
            headers: {
              token: localStorage.getItem("token"),
              "Content-Type": "application/json",
            },
            body: JSON.stringify({
              data: base64Data,
              fileModule: 2,
            }),
          }
        );
        const result = await response.json();
        // console.log("上传反馈", response, result);
        if (result.code === 20000) {
          // console.log("服务器返回数据:", result);
          this.$emit("output", result.data);
          this.uploadImage();
          // setTimeout(() => {
          //   this.stopCamera();
          // }, 200);
        }
      } catch (err) {
        console.error("上传过程中出错:", err);
      }
    },
    async uploadImage() {
      const video = this.$refs.video;
      const canvas = document.createElement("canvas");

      const cropWidth = video.videoWidth * 0.5;
      const cropHeight = video.videoHeight * 0.98;

      // 设置canvas尺寸为选择区域大小
      canvas.width = cropWidth;
      canvas.height = cropHeight;

      const x = (video.videoWidth - cropWidth) / 2;
      const y = (video.videoHeight - cropHeight) / 2;

      const ctx = canvas.getContext("2d");
      //中心60%区域
      ctx.drawImage(
        video,
        x,
        y,
        cropWidth,
        cropHeight,
        0,
        0,
        cropWidth,
        cropHeight
      );
      // ctx.drawImage(video, 0, 0, canvas.width, canvas.height);
      const timestampDiv = document.getElementById("timestamp");
      // 在canvas上绘制时间戳
      ctx.font = "24px Arial";
      ctx.fillStyle = "white";
      ctx.fillText(timestampDiv.textContent, 20, canvas.height - 20);
      try {
        const base64Data = canvas.toDataURL("image/png");
        // console.log("上传数据：Base64", base64Data);
        // 替换YOUR_SERVER_URL为你的实际服务器地址
        const response = await fetch("/yapi/File/UploadBase64", {
          method: "POST",
          headers: {
            token: localStorage.getItem("token"),
            "Content-Type": "application/json",
          },
          body: JSON.stringify({
            data: base64Data,
            fileModule: 1,
          }),
        });
        const result = await response.json();
        // console.log("上传反馈", response, result);
        if (result.code === 20000) {
          console.log("服务器上传返回数据:", result);
          this.$emit("outputPath", result.data);
          setTimeout(() => {
            this.stopCamera();
          }, 200);
        }
        this.isUpload = false;
      } catch (err) {
        console.error("上传过程中出错:", err);
      }
    },
  },
  created() {
    this.startCamera();
    this.refreshTime();
  },
  beforeDestroy() {
    this.stopCamera();
  },
};
</script>

<style scoped>
.videoContainer {
  position: relative;
  width: 50%; /* 容器宽度设为50% */
  height: 100%; /* 容器高度设为100% */
  margin: 0 auto; /* 居中显示 */
  overflow: hidden; /* 隐藏溢出部分 */
}
video {
  height: 800px;
  width: 1280px;
  transform: translate(-25%, 0%);
  /* width: 100%;
  max-width: 500px; */
  background: #000;
}
#timestamp {
  position: absolute;
  bottom: 20px;
  left: 20px;
  color: white;
  font-size: 24px;
  background-color: rgba(0, 0, 0, 0.5);
  padding: 5px;
}
</style>