react-native-audio-api/src/web-core/IIRFilterNode.web.ts

react-native-audio-api provides system for controlling audio in React Native environment compatible with Web Audio API specification

import { NotSupportedError } from '../errors';
import AudioNode from './AudioNode.web';
import { IIRFilterOptions } from '../types';
import BaseAudioContext from './BaseAudioContext.web';

export default class IIRFilterNode extends AudioNode {
  constructor(context: BaseAudioContext, options: IIRFilterOptions) {
    const iirFilterNode = new globalThis.IIRFilterNode(
      context.context,
      options
    );
    super(context, iirFilterNode);
  }

  public getFrequencyResponse(
    frequencyArray: Float32Array<ArrayBuffer>,
    magResponseOutput: Float32Array<ArrayBuffer>,
    phaseResponseOutput: Float32Array<ArrayBuffer>
  ) {
    if (
      frequencyArray.length !== magResponseOutput.length ||
      frequencyArray.length !== phaseResponseOutput.length
    ) {
      throw new NotSupportedError(
        `The lengths of the arrays are not the same frequencyArray: ${frequencyArray.length}, magResponseOutput: ${magResponseOutput.length}, phaseResponseOutput: ${phaseResponseOutput.length}`
      );
    }

    (this.node as globalThis.IIRFilterNode).getFrequencyResponse(
      frequencyArray,
      magResponseOutput,
      phaseResponseOutput
    );
  }
}