@t-mrtgu/react-native-vision-camera-fix-ios-codescan-corner/lib/module/hooks/useFrameProcessor.js

A powerful, high-performance React Native Camera library.

import { useMemo } from 'react';
import { VisionCameraProxy } from '../FrameProcessorPlugins';

/**
 * Create a new Frame Processor function which 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.
 *
 * Also make sure to memoize the returned object, so that the Camera doesn't reset the Frame Processor Context each time.
 */
export function createFrameProcessor(frameProcessor, type) {
  return {
    frameProcessor: frame => {
      'worklet';

      // Increment ref-count by one
      const internal = frame;
      internal.incrementRefCount();
      try {
        // Call sync frame processor
        frameProcessor(frame);
      } catch (e) {
        // Re-throw error on JS Thread
        VisionCameraProxy.throwJSError(e);
      } finally {
        // Potentially delete Frame if we were the last ref (no runAsync)
        internal.decrementRefCount();
      }
    },
    type: type
  };
}

/**
 * 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 faces = scanFaces(frame)
 *   console.log(`Faces: ${faces}`)
 * }, [])
 * ```
 */
export function useFrameProcessor(frameProcessor, dependencies) {
  // eslint-disable-next-line react-hooks/exhaustive-deps
  return useMemo(() => createFrameProcessor(frameProcessor, 'frame-processor'), dependencies);
}
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