react-native-audio-api/lib/module/core/AudioRecorder.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";
import { AudioEventEmitter } from "../events/index.js";
export default class AudioRecorder {
  audioEventEmitter = new AudioEventEmitter(global.AudioEventEmitter);
  constructor(options) {
    this.recorder = global.createAudioRecorder(options);
  }
  start() {
    this.recorder.start();
  }
  stop() {
    this.recorder.stop();
  }
  connect(node) {
    if (node.wasConnected) {
      throw new Error('RecorderAdapterNode cannot be connected more than once. Refer to the documentation for more details.');
    }
    node.wasConnected = true;
    this.recorder.connect(node.getNode());
  }
  disconnect() {
    this.recorder.disconnect();
  }
  onAudioReady(callback) {
    const onAudioReadyCallback = event => {
      callback({
        buffer: new AudioBuffer(event.buffer),
        numFrames: event.numFrames,
        when: event.when
      });
    };
    const subscription = this.audioEventEmitter.addAudioEventListener('audioReady', onAudioReadyCallback);
    this.recorder.onAudioReady = subscription.subscriptionId;
  }
}
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