392 lines
15 KiB
TypeScript
392 lines
15 KiB
TypeScript
import React from 'react';
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import { requireNativeComponent, NativeModules, NativeSyntheticEvent, findNodeHandle, NativeMethods, Platform } from 'react-native';
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import type { CameraDevice } from './CameraDevice';
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import type { ErrorWithCause } from './CameraError';
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import { CameraCaptureError, CameraRuntimeError, tryParseNativeCameraError, isErrorWithCause } from './CameraError';
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import type { CameraProps } from './CameraProps';
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import type { Frame } from './Frame';
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import type { PhotoFile, TakePhotoOptions } from './PhotoFile';
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import type { Point } from './Point';
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import type { TakeSnapshotOptions } from './Snapshot';
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import type { RecordVideoOptions, VideoFile } from './VideoFile';
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//#region Types
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export type CameraPermissionStatus = 'authorized' | 'not-determined' | 'denied' | 'restricted';
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export type CameraPermissionRequestResult = 'authorized' | 'denied';
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interface OnErrorEvent {
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code: string;
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message: string;
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cause?: ErrorWithCause;
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}
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type NativeCameraViewProps = Omit<CameraProps, 'device' | 'onInitialized' | 'onError' | 'frameProcessor'> & {
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cameraId: string;
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onInitialized?: (event: NativeSyntheticEvent<void>) => void;
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onError?: (event: NativeSyntheticEvent<OnErrorEvent>) => void;
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};
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type RefType = React.Component<NativeCameraViewProps> & Readonly<NativeMethods>;
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//#endregion
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// NativeModules automatically resolves 'CameraView' to 'CameraViewModule'
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// eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
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const CameraModule = NativeModules.CameraView;
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if (CameraModule == null) console.error("Camera: Native Module 'CameraView' was null! Did you run pod install?");
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//#region Camera Component
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/**
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* ### A powerful `<Camera>` component.
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*
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* Read the [VisionCamera documentation](https://cuvent.github.io/react-native-vision-camera/) for more information.
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*
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* The `<Camera>` component's most important (and therefore _required_) properties are:
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*
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* * {@linkcode CameraProps.device | device}: Specifies the {@linkcode CameraDevice} to use. Get a {@linkcode CameraDevice} by using the {@linkcode useCameraDevices | useCameraDevices()} hook, or manually by using the {@linkcode Camera.getAvailableCameraDevices Camera.getAvailableCameraDevices()} function.
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* * {@linkcode CameraProps.isActive | isActive}: A boolean value that specifies whether the Camera should actively stream video frames or not. This can be compared to a Video component, where `isActive` specifies whether the video is paused or not. If you fully unmount the `<Camera>` component instead of using `isActive={false}`, the Camera will take a bit longer to start again.
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*
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* @example
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* ```tsx
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* function App() {
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* const devices = useCameraDevices('wide-angle-camera')
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* const device = devices.back
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*
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* if (device == null) return <LoadingView />
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* return (
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* <Camera
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* style={StyleSheet.absoluteFill}
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* device={device}
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* isActive={true}
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* />
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* )
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* }
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* ```
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*
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* @component
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*/
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export class Camera extends React.PureComponent<CameraProps> {
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/**
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* @internal
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*/
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static displayName = 'Camera';
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/**
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* @internal
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*/
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displayName = Camera.displayName;
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private lastFrameProcessor: ((frame: Frame) => void) | undefined;
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private readonly ref: React.RefObject<RefType>;
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/**
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* @internal
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*/
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constructor(props: CameraProps) {
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super(props);
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this.onInitialized = this.onInitialized.bind(this);
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this.onError = this.onError.bind(this);
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this.ref = React.createRef<RefType>();
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this.lastFrameProcessor = undefined;
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}
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private get handle(): number | null {
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const nodeHandle = findNodeHandle(this.ref.current);
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if (nodeHandle == null) console.error('Camera: findNodeHandle(ref) returned null! Does the Camera view exist in the native view tree?');
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return nodeHandle;
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}
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//#region View-specific functions (UIViewManager)
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/**
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* Take a single photo and write it's content to a temporary file.
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*
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* @throws {@linkcode CameraCaptureError} When any kind of error occured while capturing the photo. Use the {@linkcode CameraCaptureError.code | code} property to get the actual error
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* @example
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* ```ts
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* const photo = await camera.current.takePhoto({
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* qualityPrioritization: 'quality',
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* flash: 'on',
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* enableAutoRedEyeReduction: true
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* })
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* ```
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*/
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public async takePhoto(options?: TakePhotoOptions): Promise<PhotoFile> {
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try {
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return await CameraModule.takePhoto(this.handle, options ?? {});
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} catch (e) {
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throw tryParseNativeCameraError(e);
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}
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}
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/**
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* Take a snapshot of the current preview view.
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*
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* This can be used as an alternative to {@linkcode Camera.takePhoto | takePhoto()} if speed is more important than quality
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*
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* @throws {@linkcode CameraCaptureError} When any kind of error occured while taking a snapshot. Use the {@linkcode CameraCaptureError.code | code} property to get the actual error
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*
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* @platform Android
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* @example
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* ```ts
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* const photo = await camera.current.takeSnapshot({
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* quality: 85,
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* skipMetadata: true
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* })
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* ```
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*/
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public async takeSnapshot(options?: TakeSnapshotOptions): Promise<PhotoFile> {
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if (Platform.OS !== 'android')
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throw new CameraCaptureError('capture/capture-type-not-supported', `'takeSnapshot()' is not available on ${Platform.OS}!`);
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try {
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return await CameraModule.takeSnapshot(this.handle, options ?? {});
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} catch (e) {
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throw tryParseNativeCameraError(e);
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}
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}
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/**
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* Start a new video recording.
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*
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* Records in the following formats:
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* * **iOS**: QuickTime (`.mov`)
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* * **Android**: MPEG4 (`.mp4`)
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*
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* @blocking This function is synchronized/blocking.
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*
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* @throws {@linkcode CameraCaptureError} When any kind of error occured while starting the video recording. Use the {@linkcode CameraCaptureError.code | code} property to get the actual error
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*
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* @example
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* ```ts
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* camera.current.startRecording({
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* onRecordingFinished: (video) => console.log(video),
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* onRecordingError: (error) => console.error(error),
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* })
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* setTimeout(() => {
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* camera.current.stopRecording()
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* }, 5000)
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* ```
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*/
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public startRecording(options: RecordVideoOptions): void {
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const { onRecordingError, onRecordingFinished, ...passThroughOptions } = options;
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if (typeof onRecordingError !== 'function' || typeof onRecordingFinished !== 'function')
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throw new CameraRuntimeError('parameter/invalid-parameter', 'The onRecordingError or onRecordingFinished functions were not set!');
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const onRecordCallback = (video?: VideoFile, error?: CameraCaptureError): void => {
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if (error != null) return onRecordingError(error);
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if (video != null) return onRecordingFinished(video);
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};
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// TODO: Use TurboModules to either make this a sync invokation, or make it async.
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try {
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CameraModule.startRecording(this.handle, passThroughOptions, onRecordCallback);
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} catch (e) {
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throw tryParseNativeCameraError(e);
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}
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}
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/**
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* Stop the current video recording.
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*
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* @throws {@linkcode CameraCaptureError} When any kind of error occured while stopping the video recording. Use the {@linkcode CameraCaptureError.code | code} property to get the actual error
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*
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* @example
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* ```ts
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* await camera.current.startRecording()
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* setTimeout(async () => {
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* const video = await camera.current.stopRecording()
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* }, 5000)
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* ```
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*/
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public async stopRecording(): Promise<void> {
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try {
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return await CameraModule.stopRecording(this.handle);
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} catch (e) {
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throw tryParseNativeCameraError(e);
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}
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}
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/**
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* Focus the camera to a specific point in the coordinate system.
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* @param {Point} point The point to focus to. This should be relative to the Camera view's coordinate system,
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* and expressed in Pixel on iOS and Points on Android.
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* * `(0, 0)` means **top left**.
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* * `(CameraView.width, CameraView.height)` means **bottom right**.
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*
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* Make sure the value doesn't exceed the CameraView's dimensions.
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*
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* @throws {@linkcode CameraRuntimeError} When any kind of error occured while focussing. Use the {@linkcode CameraRuntimeError.code | code} property to get the actual error
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* @example
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* ```ts
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* await camera.current.focus({
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* x: tapEvent.x,
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* y: tapEvent.y
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* })
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* ```
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*/
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public async focus(point: Point): Promise<void> {
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try {
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return await CameraModule.focus(this.handle, point);
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} catch (e) {
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throw tryParseNativeCameraError(e);
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}
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}
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//#endregion
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//#region Static Functions (NativeModule)
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/**
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* Get a list of all available camera devices on the current phone.
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*
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* @throws {@linkcode CameraRuntimeError} When any kind of error occured while getting all available camera devices. Use the {@linkcode CameraRuntimeError.code | code} property to get the actual error
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* @example
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* ```ts
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* const devices = await Camera.getAvailableCameraDevices()
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* const filtered = devices.filter((d) => matchesMyExpectations(d))
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* const sorted = devices.sort(sortDevicesByAmountOfCameras)
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* return {
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* back: sorted.find((d) => d.position === "back"),
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* front: sorted.find((d) => d.position === "front")
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* }
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* ```
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*/
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public static async getAvailableCameraDevices(): Promise<CameraDevice[]> {
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try {
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return await CameraModule.getAvailableCameraDevices();
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} catch (e) {
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throw tryParseNativeCameraError(e);
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}
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}
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/**
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* Gets the current Camera Permission Status. Check this before mounting the Camera to ensure
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* the user has permitted the app to use the camera.
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*
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* To actually prompt the user for camera permission, use {@linkcode Camera.requestCameraPermission | requestCameraPermission()}.
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*
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* @throws {@linkcode CameraRuntimeError} When any kind of error occured while getting the current permission status. Use the {@linkcode CameraRuntimeError.code | code} property to get the actual error
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*/
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public static async getCameraPermissionStatus(): Promise<CameraPermissionStatus> {
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try {
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return await CameraModule.getCameraPermissionStatus();
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} catch (e) {
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throw tryParseNativeCameraError(e);
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}
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}
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/**
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* Gets the current Microphone-Recording Permission Status. Check this before mounting the Camera to ensure
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* the user has permitted the app to use the microphone.
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*
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* To actually prompt the user for microphone permission, use {@linkcode Camera.requestMicrophonePermission | requestMicrophonePermission()}.
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*
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* @throws {@linkcode CameraRuntimeError} When any kind of error occured while getting the current permission status. Use the {@linkcode CameraRuntimeError.code | code} property to get the actual error
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*/
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public static async getMicrophonePermissionStatus(): Promise<CameraPermissionStatus> {
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try {
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return await CameraModule.getMicrophonePermissionStatus();
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} catch (e) {
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throw tryParseNativeCameraError(e);
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}
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}
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/**
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* Shows a "request permission" alert to the user, and resolves with the new camera permission status.
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*
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* If the user has previously blocked the app from using the camera, the alert will not be shown
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* and `"denied"` will be returned.
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*
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* @throws {@linkcode CameraRuntimeError} When any kind of error occured while requesting permission. Use the {@linkcode CameraRuntimeError.code | code} property to get the actual error
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*/
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public static async requestCameraPermission(): Promise<CameraPermissionRequestResult> {
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try {
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return await CameraModule.requestCameraPermission();
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} catch (e) {
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throw tryParseNativeCameraError(e);
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}
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}
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/**
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* Shows a "request permission" alert to the user, and resolves with the new microphone permission status.
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*
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* If the user has previously blocked the app from using the microphone, the alert will not be shown
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* and `"denied"` will be returned.
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*
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* @throws {@linkcode CameraRuntimeError} When any kind of error occured while requesting permission. Use the {@linkcode CameraRuntimeError.code | code} property to get the actual error
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*/
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public static async requestMicrophonePermission(): Promise<CameraPermissionRequestResult> {
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try {
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return await CameraModule.requestMicrophonePermission();
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} catch (e) {
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throw tryParseNativeCameraError(e);
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}
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}
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//#endregion
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//#region Events (Wrapped to maintain reference equality)
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private onError(event: NativeSyntheticEvent<OnErrorEvent>): void {
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if (this.props.onError != null) {
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const error = event.nativeEvent;
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const cause = isErrorWithCause(error.cause) ? error.cause : undefined;
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this.props.onError(
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// @ts-expect-error We're casting from unknown bridge types to TS unions, I expect it to hopefully work
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new CameraRuntimeError(error.code, error.message, cause),
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);
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}
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}
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private onInitialized(): void {
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this.props.onInitialized?.();
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}
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//#endregion
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/**
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* @internal
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*/
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private assertFrameProcessorsEnabled(): void {
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// @ts-expect-error JSI functions aren't typed
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if (global.setFrameProcessor == null || global.unsetFrameProcessor == null)
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throw new Error('Frame Processors are not enabled. Make sure you install react-native-reanimated 2.1.0 or above!');
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}
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/**
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* @internal
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*/
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componentWillUnmount(): void {
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this.assertFrameProcessorsEnabled();
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// @ts-expect-error JSI functions aren't typed
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global.unsetFrameProcessor(this.handle);
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}
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/**
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* @internal
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*/
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componentDidUpdate(): void {
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if (this.props.frameProcessor !== this.lastFrameProcessor) {
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this.assertFrameProcessorsEnabled();
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// frameProcessor argument changed. Update native to reflect the change.
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if (this.props.frameProcessor != null) {
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// 1. Spawn threaded JSI Runtime (if not already done)
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// 2. Add video data output to Camera stream (if not already done)
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// 3. Workletize the frameProcessor and prepare it for being called with frames
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// @ts-expect-error JSI functions aren't typed
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global.setFrameProcessor(this.handle, this.props.frameProcessor);
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} else {
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// 1. Destroy the threaded runtime
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// 2. remove the frame processor
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// 3. Remove the video data output
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// @ts-expect-error JSI functions aren't typed
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global.unsetFrameProcessor(this.handle);
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}
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this.lastFrameProcessor = this.props.frameProcessor;
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}
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}
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/**
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* @internal
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*/
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public render(): React.ReactNode {
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// We remove the big `device` object from the props because we only need to pass `cameraId` to native.
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const { device, frameProcessor: _, ...props } = this.props;
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return <NativeCameraView {...props} cameraId={device.id} ref={this.ref} onInitialized={this.onInitialized} onError={this.onError} />;
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}
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}
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//#endregion
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// requireNativeComponent automatically resolves 'CameraView' to 'CameraViewManager'
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const NativeCameraView = requireNativeComponent<NativeCameraViewProps>(
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'CameraView',
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// @ts-expect-error because the type declarations are kinda wrong, no?
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Camera,
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);
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