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

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

import AudioNode from './AudioNode.web';
import { AnalyserOptions } from '../types';
import BaseAudioContext from './BaseAudioContext.web';

export default class AnalyserNode extends AudioNode {
  fftSize: number;
  readonly frequencyBinCount: number;
  minDecibels: number;
  maxDecibels: number;
  smoothingTimeConstant: number;

  constructor(context: BaseAudioContext, analyserOptions?: AnalyserOptions) {
    const node = new globalThis.AnalyserNode(context.context, analyserOptions);
    super(context, node);

    this.fftSize = node.fftSize;
    this.frequencyBinCount = node.frequencyBinCount;
    this.minDecibels = node.minDecibels;
    this.maxDecibels = node.maxDecibels;
    this.smoothingTimeConstant = node.smoothingTimeConstant;
  }

  public getByteFrequencyData(array: Uint8Array): void {
    (this.node as globalThis.AnalyserNode).getByteFrequencyData(
      array as Uint8Array<ArrayBuffer>
    );
  }

  public getByteTimeDomainData(array: Uint8Array): void {
    (this.node as globalThis.AnalyserNode).getByteTimeDomainData(
      array as Uint8Array<ArrayBuffer>
    );
  }

  public getFloatFrequencyData(array: Float32Array): void {
    (this.node as globalThis.AnalyserNode).getFloatFrequencyData(
      array as Float32Array<ArrayBuffer>
    );
  }

  public getFloatTimeDomainData(array: Float32Array): void {
    (this.node as globalThis.AnalyserNode).getFloatTimeDomainData(
      array as Float32Array<ArrayBuffer>
    );
  }
}