react-native-audio-api/lib/module/core/AudioStretcher.js

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

"use strict";

import AudioBuffer from "./AudioBuffer.js";
class AudioStretcher {
  static instance = null;
  constructor() {
    this.stretcher = global.createAudioStretcher();
  }
  static getInstance() {
    if (!AudioStretcher.instance) {
      AudioStretcher.instance = new AudioStretcher();
    }
    return AudioStretcher.instance;
  }
  async changePlaybackSpeedInstance(input, playbackSpeed) {
    const buffer = await this.stretcher.changePlaybackSpeed(input.buffer, playbackSpeed);
    if (!buffer) {
      throw new Error('Failed to change playback speed');
    }
    return new AudioBuffer(buffer);
  }
}
export default async function changePlaybackSpeed(input, playbackSpeed) {
  return AudioStretcher.getInstance().changePlaybackSpeedInstance(input, playbackSpeed);
}
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