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

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

"use strict";

import AudioNode from "./AudioNode.js";
import { InvalidStateError, RangeError } from "../errors/index.js";
import { AudioEventEmitter } from "../events/index.js";
export default class AudioScheduledSourceNode extends AudioNode {
  hasBeenStarted = false;
  audioEventEmitter = new AudioEventEmitter(global.AudioEventEmitter);
  start(when = 0) {
    if (when < 0) {
      throw new RangeError(`when must be a finite non-negative number: ${when}`);
    }
    if (this.hasBeenStarted) {
      throw new InvalidStateError('Cannot call start more than once');
    }
    this.hasBeenStarted = true;
    this.node.start(when);
  }
  stop(when = 0) {
    if (when < 0) {
      throw new RangeError(`when must be a finite non-negative number: ${when}`);
    }
    if (!this.hasBeenStarted) {
      throw new InvalidStateError('Cannot call stop without calling start first');
    }
    this.node.stop(when);
  }
  get onEnded() {
    return this.onEndedCallback;
  }
  set onEnded(callback) {
    if (!callback) {
      this.node.onEnded = '0';
      this.onEndedSubscription?.remove();
      this.onEndedSubscription = undefined;
      this.onEndedCallback = undefined;
      return;
    }
    this.onEndedCallback = callback;
    this.onEndedSubscription = this.audioEventEmitter.addAudioEventListener('ended', callback);
    this.node.onEnded = this.onEndedSubscription.subscriptionId;
  }
}
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