subject-two/entry/src/main/ets/pages/compontents/FaceCompare_bak.ets

import camera from '@ohos.multimedia.camera';
import image from '@ohos.multimedia.image';
import TopLogo from '../compontents/topLogo';

import buffer from '@ohos.buffer';

@Component
export default struct FaceCompare {
  @State imageBase64: string = 'data:image/jpeg;base64,'
  private cameraObj: any = null;
  private cameraManager: any = null;
  private surfaceId: string = '';
  private xcomponentController: XComponentController = new XComponentController();
  // 相机会话
  private captureSession: any = null;
  // 相机输入流
  private cameraInput: any = null;
  // 预览输出流
  private previewOutput: any = null;
  // 拍照输出流
  private photoOutput: any = null;
  // 照片接收对象
  private imageRecever: any = null;
  private timeSetTimeout: number = 0; //定时器执行次数
  private timer: any = 0; //定时器

  constructor() {
    super()
  }

  build() {
    Column() {
      TopLogo({
        outFlag: false
      })
      Row() {
        XComponent({
          id: 'xcomponent',
          type: 'surface',
          controller: this.xcomponentController
        })
          .onLoad(async () => {
            this.xcomponentController.setXComponentSurfaceSize({ surfaceWidth: 640, surfaceHeight: 480 });
            this.surfaceId = this.xcomponentController.getXComponentSurfaceId()
            console.log('jiangsong: xcomponentController this.surfaceId = ' + this.surfaceId)
            await this.initCamera();
          })
          .width('420px')
          .height('240px')
      }
      .backgroundColor(Color.Yellow)
      .position({ x: 0, y: 0 })

      Row() {
        Text('拍照')
          .width('100px')
          .height('55px')
          .backgroundColor(Color.Blue)
          .onClick(() => {
            this.takePhoto()
          })
      }

      Row() {
        Image(this.imageBase64)
          .width(420).height(240).border({ width: 1 })
      }
    }
    .width('100%')
  }

  async aboutToAppear() {
  }

  async aboutToDisappear() {
    // 停止当前会话
    this.captureSession.stop()
    // 释放相机输入流
    this.cameraInput.close()
    // 释放预览输出流
    this.previewOutput.release()
    // 释放拍照输出流
    this.photoOutput.release()
    // 释放会话
    this.captureSession.release()
    // 会话置空
    this.captureSession = null
  }

  async initCamera() {
    let cameraManager = await camera.getCameraManager(globalThis.context)
    if (!cameraManager) {
      console.error("jiangsong camera.getCameraManager error")
      return;
    }
    // 监听相机状态变化
    cameraManager.on('cameraStatus', (err, cameraStatusInfo) => {
      console.info(`jiangsong camera : ${cameraStatusInfo.camera.cameraId}`);
      console.info(`jiangsong status: ${cameraStatusInfo.status}`);
    })

    // 获取相机列表
    let cameraArray = await cameraManager.getSupportedCameras();
    if (cameraArray.length <= 0) {
      console.error("jiangsong cameraManager.getSupportedCameras error")
      return;
    }

    for (let index = 0; index < cameraArray.length; index++) {
      console.info('cameraId : ' + cameraArray[index].cameraId); // 获取相机ID
      console.info('cameraPosition : ' + cameraArray[index].cameraPosition); // 获取相机位置
      console.info('cameraType : ' + cameraArray[index].cameraType); // 获取相机类型
      console.info('connectionType : ' + cameraArray[index].connectionType); // 获取相机连接类型
    }

    // 创建相机输入流
    try {
      this.cameraInput = cameraManager.createCameraInput(cameraArray[0]);
    } catch (error) {
      console.error('jiangsong Failed to createCameraInput errorCode = ' + error.code);
    }

    // 监听cameraInput错误信息
    let cameraDevice = cameraArray[0];
    this.cameraInput.on('error', cameraDevice, (error) => {
      console.info(`jiangsong Camera input error code: ${error.code}`);
    })

    // 打开相机
    await this.cameraInput.open((err) => {
      if (err) {
        console.error(`jiangsong Failed to open the camera. ${err.code}`);
        return;
      }
      console.log('jiangsong Callback returned with camera opened.');
    });
    // 获取相机设备支持的输出流能力
    let cameraOutputCap = await cameraManager.getSupportedOutputCapability(cameraArray[0]);
    if (!cameraOutputCap) {
      console.error("jiangsong cameraManager.getSupportedOutputCapability error")
      return;
    }
    console.info("outputCapability: " + JSON.stringify(cameraOutputCap));

    let previewProfilesArray = cameraOutputCap.previewProfiles;
    if (!previewProfilesArray) {
      console.error("jiangsong createOutput previewProfilesArray == null || undefined")
    }

    let photoProfilesArray = cameraOutputCap.photoProfiles;
    if (!photoProfilesArray) {
      console.error("jiangsong createOutput photoProfilesArray == null || undefined")
    }


    // 创建预览输出流,其中参数 surfaceId 参考上文 XComponent 组件，预览流为XComponent组件提供的surface
    try {
      this.previewOutput = cameraManager.createPreviewOutput(previewProfilesArray[0], this.surfaceId)
    } catch (error) {
      console.error("jiangsong Failed to create the PreviewOutput instance.")
    }

    // 监听预览输出错误信息
    this.previewOutput.on('error', (error) => {
      console.info(`jiangosng Preview output error code: ${error.code}`);
    })

    // 创建ImageReceiver对象，并设置照片参数：分辨率大小是根据前面 photoProfilesArray 获取的当前设备所支持的拍照分辨率大小去设置
    this.imageRecever = await image.createImageReceiver(1920, 1080, 4, 8)
    // 获取照片显示SurfaceId
    let photoSurfaceId = await this.imageRecever.getReceivingSurfaceId()
    // 创建拍照输出流
    try {
      this.photoOutput = cameraManager.createPhotoOutput(photoProfilesArray[0], photoSurfaceId)
    } catch (error) {
      console.error('jiangsong Failed to createPhotoOutput errorCode = ' + error.code);
    }
    //创建会话
    try {
      this.captureSession = cameraManager.createCaptureSession()
    } catch (error) {
      console.error('jiangsong Failed to create the CaptureSession instance. errorCode = ' + error.code);
    }

    // 监听session错误信息
    this.captureSession.on('error', (error) => {
      console.info(`jiangsong Capture session error code: ${error.code}`);
    })

    // 开始配置会话
    try {
      this.captureSession.beginConfig()
    } catch (error) {
      console.error('jiangsong Failed to beginConfig. errorCode = ' + error.code);
    }

    // 向会话中添加相机输入流
    try {
      this.captureSession.addInput(this.cameraInput)
    } catch (error) {
      console.error('jiangsong Failed to addInput. errorCode = ' + error.code);
    }

    // 向会话中添加预览输出流
    try {
      this.captureSession.addOutput(this.previewOutput)
    } catch (error) {
      console.error('jiangsong Failed to addOutput(previewOutput). errorCode = ' + error.code);
    }

    // 向会话中添加拍照输出流
    try {
      this.captureSession.addOutput(this.photoOutput)
    } catch (error) {
      console.error('jiangsong Failed to addOutput(photoOutput). errorCode = ' + error.code);
    }

    // 提交会话配置
    await this.captureSession.commitConfig()

    // 启动会话
    await this.captureSession.start().then(() => {
      console.info('jiangsong Promise returned to indicate the session start success.');
    })
    // 判断设备是否支持闪光灯
    let flashStatus
    try {
      flashStatus = this.captureSession.hasFlash()
    } catch (error) {
      console.error('jiangsong Failed to hasFlash. errorCode = ' + error.code);
    }
    console.info('jiangsong Promise returned with the flash light support status:' + flashStatus);

    if (flashStatus) {
      // 判断是否支持自动闪光灯模式
      let flashModeStatus
      try {
        let status = this.captureSession.isFlashModeSupported(camera.FlashMode.FLASH_MODE_AUTO)
        flashModeStatus = status
      } catch (error) {
        console.error('jiangsong Failed to check whether the flash mode is supported. errorCode = ' + error.code);
      }
      if (flashModeStatus) {
        // 设置自动闪光灯模式
        try {
          this.captureSession.setFlashMode(camera.FlashMode.FLASH_MODE_AUTO)
        } catch (error) {
          console.error('jiangsong Failed to set the flash mode. errorCode = ' + error.code);
        }
      }
    }
  }

  takePhoto() {
    let settings = {
      quality: camera.QualityLevel.QUALITY_LEVEL_HIGH, // 设置图片质量高
      rotation: camera.ImageRotation.ROTATION_0                                            // 设置图片旋转角度0
    }
    // 使用当前拍照设置进行拍照
    this.photoOutput.capture(settings, async (err) => {
      if (err) {
        console.error(`jiangsong Failed to capture the photo ${err.message}` + JSON.stringify(err));
        return;
      }
      console.info('jiangsong Callback invoked to indicate the photo capture request success.');

      this.imageRecever.getReceivingSurfaceId().then(id => {
        console.log('jiangsong getReceivingSurfaceId succeeded.');
      }).catch(error => {
        console.log('jiangsong getReceivingSurfaceId failed.');
      })

      this.getPhoto();
      this.timeSetTimeout = 0;
      clearTimeout(this.timer);
    });
  }

  getPhoto() {
    this.imageRecever.readLatestImage((err, img) => {
      if (err) {
        console.log('jiangsong readLatestImage failed.' + JSON.stringify((err)));
        this.timeSetTimeout++;
        if (this.timeSetTimeout > 20) {
          return;
        }
        this.timer = setTimeout(() => {
          this.getPhoto()
        }, 300)
      } else {
        console.log('jiangsong img.clipRect.' + JSON.stringify(img.clipRect));

        img.getComponent(4, (err, component) => {
          if (err) {
            console.log('jiangsong getComponent failed.' + JSON.stringify(err));
          } else {

            const imagePackerApi = image.createImagePacker();
            let packOpts = { format: "image/jpeg", quality: 98 };

            let buf = buffer.from(component.byteBuffer);
            let str = buf.toString('base64')
            this.imageBase64 = this.imageBase64 + str
            // console.error('jiangsong this.imageBase64.length: ' + this.imageBase64.length);
            // console.error('jiangsong this.imageBase64.length: ' + this.imageBase64.slice(1, 100));
            //
            // const imageSource = image.createImageSource(component.byteBuffer);
            // imagePackerApi.packing(imageSource, packOpts).then(async data => {
            //   console.log('jiangsong encodeToStringSync data.' + typeof data);
            //   // let res = await writeFile({
            //   //   fileName: '/test.jpg',
            //   //   buffer: data
            //   // });
            //
            //   let buf = buffer.from(data);
            //   let str = buf.toString('base64')
            //   this.imageBase64 = this.imageBase64 + str
            // }).catch(error => {
            //   console.error('jiangsong Failed to pack the image. And the error is: ' + error);
            // })
          }
        })
      }
    });
  }
}