crypto-slots/src/client/sound.js

A minimal test server is provided, see server

export default class SlotSound {
  constructor(src, context) {
    if (!src) throw Error('path to file needed')
    
    if (!context) this.audioContext = new AudioContext()
    else this.audioContext = context
    
    this.src = src
    this.gainNode = this.audioContext.createGain();
    
    (async() => {
      const response = await fetch(this.src);
      const audioData = await response.arrayBuffer();
      this.audioContext.decodeAudioData(audioData, buffer => {
        this.buffer = buffer;
        // preload rigntone (get rid of the delay on first play)
        this.source = this.audioContext.createBufferSource()
        
        this.source.connect(this.gainNode)
        this.gainNode.connect(this.audioContext.destination)
        
        // this.source.buffer = this.buffer;
      })
    })()
    this.playing = false;
  }

  play() {
    if (this.playing) return;
    this.playing = true;
    
    this.source = this.audioContext.createBufferSource()    
    this.source.connect(this.gainNode)
    this.gainNode.connect(this.audioContext.destination)
    this.source.buffer = this.buffer;
    
    this.source.loop = this.loop;
    this.source.start(this.startTime);
  }

  stop() {
    if (!this.playing) return;
    this.playing = false;
    this.source.stop(this.stopTime);
  }
}