class PCM16Processor extends AudioWorkletProcessor {
  constructor() {
    super();
    this.buffer = new ArrayBuffer(3200);
    this.view = new DataView(this.buffer);
    this.offset = 0;
  }
  process(inputs) {
    const samples = inputs[0]?.[0];
    if (!samples) return true;
    for (const sample of samples) {
      const value = Math.max(-1, Math.min(1, sample));
      this.view.setInt16(
        this.offset * 2,
        value < 0 ? value * 32768 : value * 32767,
        true,
      );
      if (++this.offset === 1600) {
        this.port.postMessage(this.buffer, [this.buffer]);
        this.buffer = new ArrayBuffer(3200);
        this.view = new DataView(this.buffer);
        this.offset = 0;
      }
    }
    return true; // Output stays silent; no microphone feedback to the speakers.
  }
}
registerProcessor("pcm16", PCM16Processor);