react-native-vision-camera/src/hooks/useFrameProcessor.ts

60 lines
2.4 KiB
TypeScript

/* global _setGlobalConsole */
import { DependencyList, useCallback } from 'react';
import type { Frame } from '../Frame';
type FrameProcessor = (frame: Frame) => void;
const capturableConsole = console;
/**
* Returns a memoized Frame Processor function wich you can pass to the `<Camera>`. (See ["Frame Processors"](https://react-native-vision-camera.com/docs/guides/frame-processors))
*
* Make sure to add the `'worklet'` directive to the top of the Frame Processor function, otherwise it will not get compiled into a worklet.
*
* @param frameProcessor The Frame Processor
* @param dependencies The React dependencies which will be copied into the VisionCamera JS-Runtime.
* @returns The memoized Frame Processor.
* @example
* ```ts
* const frameProcessor = useFrameProcessor((frame) => {
* 'worklet'
* const qrCodes = scanQRCodes(frame)
* console.log(`QR Codes: ${qrCodes}`)
* }, [])
* ```
*/
export function useFrameProcessor(frameProcessor: FrameProcessor, dependencies: DependencyList): FrameProcessor {
return useCallback((frame: Frame) => {
'worklet';
// @ts-expect-error
if (global.didSetConsole == null || global.didSetConsole === false) {
const console = {
// @ts-expect-error __callAsync is injected by native REA
// eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
debug: capturableConsole.debug.__callAsync,
// @ts-expect-error __callAsync is injected by native REA
// eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
log: capturableConsole.log.__callAsync,
// @ts-expect-error __callAsync is injected by native REA
// eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
warn: capturableConsole.warn.__callAsync,
// @ts-expect-error __callAsync is injected by native REA
// eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
error: capturableConsole.error.__callAsync,
// @ts-expect-error __callAsync is injected by native REA
// eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
info: capturableConsole.info.__callAsync,
};
// @ts-expect-error _setGlobalConsole is set by RuntimeDecorator::decorateRuntime
_setGlobalConsole(console);
// @ts-expect-error
global.didSetConsole = true;
}
frameProcessor(frame);
// eslint-disable-next-line react-hooks/exhaustive-deps
}, dependencies);
}