All files / src/renderer/lib/soundfx soundfx.ts

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let globalAudioCtx: AudioContext | undefined = undefined;
 
export const playTone = (frequency: number, duration: number) => {
  const audioCtx = getAudioCtx();
  const gainNode = audioCtx.createGain();
  const oscillator = audioCtx.createOscillator();
 
  gainNode.gain.value = 0.2;
 
  oscillator.type = "square";
  oscillator.frequency.setValueAtTime(frequency, audioCtx.currentTime);
 
  oscillator.connect(gainNode);
  gainNode.connect(audioCtx.destination);
  oscillator.start();
 
  setTimeout(() => {
    oscillator.stop();
    gainNode.disconnect();
  }, duration);
 
  return oscillator;
};
 
export const stopTone = (oscillator: OscillatorNode) => {
  oscillator.stop();
};
 
export const decodeAudioData = (buffer: ArrayBuffer) => {
  const audioCtx = getAudioCtx();
  return audioCtx.decodeAudioData(buffer);
};
 
export const playBuffer = (audioBuffer: AudioBuffer) => {
  const audioCtx = getAudioCtx();
  const source = audioCtx.createBufferSource();
  source.buffer = audioBuffer;
  source.connect(audioCtx.destination);
  source.start();
  source.onended = () => {
    source.disconnect();
  };
  return source;
};
 
export const stopBuffer = (bufferSource: AudioBufferSourceNode) => {
  bufferSource.stop();
};
 
const getAudioCtx = () => {
  Iif (!globalAudioCtx) {
    globalAudioCtx = new window.AudioContext();
  }
  return globalAudioCtx;
};