// AudioWorklet processor — accumulates 4096 samples (~256ms at 16kHz) before sending
class PCMProcessor extends AudioWorkletProcessor {
  constructor() {
    super();
    this._chunks = [];
    this._total = 0;
    this._target = 4096;
  }

  process(inputs) {
    const ch = inputs[0] && inputs[0][0];
    if (ch && ch.length > 0) {
      this._chunks.push(ch.slice());
      this._total += ch.length;

      if (this._total >= this._target) {
        const out = new Float32Array(this._total);
        let offset = 0;
        for (const c of this._chunks) { out.set(c, offset); offset += c.length; }
        this._chunks = [];
        this._total = 0;
        this.port.postMessage(out.buffer, [out.buffer]);
      }
    }
    return true;
  }
}

registerProcessor('pcm-processor', PCMProcessor);