fixed c14b44a6 from https://gitee.com/zc2468/docs/pulls/24146

ArkTs整改
Signed-off-by: Nzhangchao <zhangchao338@huawei.com>

zh-cn/application-dev/media/Readme-CN.md

@@ -63,7 +63,7 @@
     - [拍照实现方案](camera-shooting-case.md)
     - [录像实现方案](camera-recording-case.md)
     - [使用人像模式拍照](camera-mode.md)
-    - [双路预览](dual-channel-preview.md)
+    - [双路预览](camera-dual-channel-preview.md)
     - [性能提升方案（仅对系统应用开放）](camera-performance-improvement.md)
 - 图片
   - [图片开发概述](image-overview.md)

zh-cn/application-dev/media/camera-dual-channel-preview.md

@@ -23,23 +23,25 @@
 
    创建双路预览流的SurfaceId，除XComponent组件的SurfaceId外，还需要使用ImageReceiver组件创建生成的SurfaceId，需要使用image模块提供的接口。
 
-   ```js
+   ```ts
    import image from '@ohos.multimedia.image';
    ```
 
 2. 创建ImageReceiver组件Surface。
 
-   ```js
-   function getImageReceiverSurfaceId() {
-       let receiver = image.createImageReceiver(640, 480, 4, 8);
-       console.info('before ImageReceiver check');
-       if (receiver !== undefined) {
-         console.info('ImageReceiver is ok');
-         let ImageReceiverSurfaceId = receiver.getReceivingSurfaceId();
-         console.info('ImageReceived id: ' + JSON.stringify(ImageReceiverSurfaceId));
-       } else {
-         console.info('ImageReceiver is not ok');
-       }
+   ```ts
+   async function getImageReceiverSurfaceId(): Promise<string> {
+     let receiver: image.ImageReceiver = image.createImageReceiver(640, 480, 4, 8);
+     console.info('before ImageReceiver check');
+     let ImageReceiverSurfaceId: string;
+     if (receiver !== undefined) {
+       console.info('ImageReceiver is ok');
+       let ImageReceiverSurfaceId: string = await receiver.getReceivingSurfaceId();
+       console.info(`ImageReceived id: ${ImageReceiverSurfaceId}`);
+     } else {
+       console.info('ImageReceiver is not ok');
+     }
+     return ImageReceiverSurfaceId;
    }
    ```
 
@@ -47,27 +49,33 @@
 
    可参考[相机预览指导文档](camera-preview.md)。
 
-   ```js
+   ```ets
+   //xxx.ets
    // 创建XComponentController 
-   mXComponentController: XComponentController = new XComponentController;                   
-   build() {
+   @Component
+   struct XComponentPage {
+     // 创建XComponentController
+     mXComponentController: XComponentController = new XComponentController;
+   
+     build() {
        Flex() {
-           // 创建XComponent
-           XComponent({                                                                     
-               id: '',
-               type: 'surface',
-               libraryname: '',
-               controller: this.mXComponentController
-           })
-           .onLoad(() => {                                                                  
-               // 设置Surface宽高（1920*1080），预览尺寸设置参考前面 previewProfilesArray 获取的当前设备所支持的预览分辨率大小去设置
-               this.mXComponentController.setXComponentSurfaceSize({surfaceWidth:1920,surfaceHeight:1080});
-               // 获取Surface ID
-               globalThis.XComponentsurfaceId = this.mXComponentController.getXComponentSurfaceId();
+         // 创建XComponent
+         XComponent({
+           id: '',
+           type: 'surface',
+           libraryname: '',
+           controller: this.mXComponentController
+         })
+           .onLoad(() => {
+             // 设置Surface宽高（1920*1080），预览尺寸设置参考前面 previewProfilesArray 获取的当前设备所支持的预览分辨率大小去设置
+             this.mXComponentController.setXComponentSurfaceSize({surfaceWidth:1920,surfaceHeight:1080});
+             // 获取Surface ID
+             let surfaceId: string = this.mXComponentController.getXComponentSurfaceId();
            })
-           .width('100%')                                                                 
-           .height('100%')                                                                
+           .width('1920px')
+           .height('1080px')
        }
+     }
    }
    ```
 
@@ -75,83 +83,84 @@
 
    将步骤2、3生成的两路SurfaceId通过createPreviewOutput方法传递到相机服务，创建两路预览流，其余流程按照正常预览流程开发。
 
-   ```js
-   let cameraManager = camera.getCameraManager(globalThis.abilityContext);
-   let CamerasDevices = cameraManager.getSupportedCameras(); // 获取支持的相机设备对象
-
-   // 正常写法通过下面方式获取实际情况下的profile对象
-   // let profiles = await this.cameraManager.getSupportedOutputCapability(CamerasDevices[cameraDeviceIndex]); // 获取对应相机设备profiles
-   // let previewProfiles = profiles.previewProfiles;
-
-   // 预览流1
-   let previewProfilesObj: camera.Profile;
-   previewProfilesObj.size.width = 640;
-   previewProfilesObj.size.height = 480;
-   previewProfilesObj.format = 3;
-
-   // 预览流2
-   let previewProfilesObj2: camera.Profile;
-   previewProfilesObj2.size.width = 640;
-   previewProfilesObj2.size.height = 480;
-   previewProfilesObj2.format = 3;
-
-   // 创建 预览流1 输出对象
-   let previewOutput = cameraManager.createPreviewOutput(previewProfilesObj, XComponentsurfaceId);
-
-   // 创建 预览流2 输出对象
-   let imageReceiverSurfaceId: string = await this.mReceiver.getReceivingSurfaceId();
-   let previewOutput2 = cameraManager.createPreviewOutput(previewProfilesObj2, imageReceiverSurfaceId);
-
-   // 创建cameraInput输出对象
-   let cameraInput = cameraManager.createCameraInput(CamerasDevices[cameraDeviceIndex]);
-
-   // 打开相机
-   await cameraInput.open();
-
-   // 会话流程
-   let captureSession = await cameraManager.createCaptureSession();
-
-   // 开始配置会话
-   captureSession.beginConfig();
-
-   // 把CameraInput加入到会话
-   captureSession.addInput(cameraInput);
-
-   // 把 预览流1 加入到会话
-   captureSession.addOutput(previewOutput)
-
-   // 把 预览流2 加入到会话
-   captureSession.addOutput(previewOutput2);
-
-   // 提交配置信息
-   await captureSession.commitConfig();
-
-   // 会话开始
-   await captureSession.start();
+   ```ts
+   import camera from '@ohos.multimedia.camera';
+
+   async function createDualChannelPreview(cameraManager: camera.CameraManager, XComponentSurfaceId: string, receiver: image.ImageReceiver): Promise<void> {
+     let camerasDevices: Array<camera.CameraDevice> = cameraManager.getSupportedCameras(); // 获取支持的相机设备对象
+   
+     // 获取profile对象
+     let profiles: camera.CameraOutputCapability = await this.cameraManager.getSupportedOutputCapability(camerasDevices[0]); // 获取对应相机设备profiles
+     let previewProfiles: Array<camera.Profile> = profiles.previewProfiles;
+   
+     // 预览流1
+     let previewProfilesObj: camera.Profile = previewProfiles[0];
+   
+     // 预览流2
+     let previewProfilesObj2: camera.Profile = previewProfiles[0];
+   
+     // 创建 预览流1 输出对象
+     let previewOutput: camera.PreviewOutput = cameraManager.createPreviewOutput(previewProfilesObj, XComponentSurfaceId);
+   
+     // 创建 预览流2 输出对象
+     let imageReceiverSurfaceId: string = await receiver.getReceivingSurfaceId();
+     let previewOutput2: camera.PreviewOutput = cameraManager.createPreviewOutput(previewProfilesObj2, imageReceiverSurfaceId);
+   
+     // 创建cameraInput对象
+     let cameraInput: camera.CameraInput = cameraManager.createCameraInput(camerasDevices[0]);
+   
+     // 打开相机
+     await cameraInput.open();
+   
+     // 会话流程
+     let captureSession: camera.CaptureSession = cameraManager.createCaptureSession();
+   
+     // 开始配置会话
+     captureSession.beginConfig();
+   
+     // 把CameraInput加入到会话
+     captureSession.addInput(cameraInput);
+   
+     // 把 预览流1 加入到会话
+     captureSession.addOutput(previewOutput)
+   
+     // 把 预览流2 加入到会话
+     captureSession.addOutput(previewOutput2);
+   
+     // 提交配置信息
+     await captureSession.commitConfig();
+   
+     // 会话开始
+     await captureSession.start();
+   }
    ```
 
 5. 通过ImageReceiver实时获取预览图像。
 
    通过ImageReceiver组件中imageArrival事件监听获取底层返回的图像数据，详细的API说明请参考[Image API参考](../reference/apis/js-apis-image.md)。
 
-   ```js
-   this.receiver.on('imageArrival', () => {
-       this.receiver.readNextImage((err, nextImage: image.Image) => {
-           if (err || nextImage === undefined) {
-               return;
-           }
-           nextImage.getComponent(image.ComponentType.JPEG, (errMsg, img) => {
-           if (errMsg || img === undefined) {
-               return;
+   ```ts
+   import { BusinessError } from '@ohos.base';
+
+   function onImageArrival(receiver: image.ImageReceiver): void {
+     receiver.on('imageArrival', () => {
+       receiver.readNextImage((err: BusinessError, nextImage: image.Image) => {
+         if (err || nextImage === undefined) {
+           return;
+         }
+         nextImage.getComponent(image.ComponentType.JPEG, (err: BusinessError, imgComponent: image.Component) => {
+           if (err || imgComponent === undefined) {
+             return;
            }
-           let buffer;
-           if (img.byteBuffer) {
-               buffer = img.byteBuffer;
+           let buffer: ArrayBuffer;
+           if (imgComponent.byteBuffer) {
+             buffer = imgComponent.byteBuffer;
            } else {
-               return;
+             return;
            }
            // do something...;
-           })
+         })
        })
-   })
+     })
+   }
    ```