react-native-vision-camera/lib/module/frame-processors/withFrameRefCounting.js

A powerful, high-performance React Native Camera library.

import { throwErrorOnJS } from './throwErrorOnJS';

/**
 * A private API to wrap a Frame Processor with a ref-counting mechanism
 * @worklet
 * @internal
 */
export function withFrameRefCounting(frameProcessor) {
  return 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
      throwErrorOnJS(e);
    } finally {
      // Potentially delete Frame if we were the last ref (no runAsync)
      internal.decrementRefCount();
    }
  };
}
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