Function prewarmDecoderWorker

client/src/decoder/decoderWorker.ts:81–109

(audioContextSampleRate: number)

// Create and pre-warm a decoder worker (should be called early, e.g., on page load)
export const prewarmDecoderWorker = (audioContextSampleRate: number): Promise<void> => {
  if (prewarmedWorkerReady && prewarmedSampleRate === audioContextSampleRate) {
    console.log("Using existing prewarmed worker");
    return prewarmedWorkerReady;
  }
  
  // Terminate old worker if sample rate changed
  if (prewarmedWorker) {
    prewarmedWorker.terminate();
  }
  
  console.log("Creating and prewarming decoder worker");
  lastWorkerError = null;
  prewarmedWorker = createWorkerWithErrorTracking();
  prewarmedSampleRate = audioContextSampleRate;
  
  sendInitCommand(prewarmedWorker, audioContextSampleRate);
  
  prewarmedWorkerReady = new Promise((resolve) => {
    // Give worker plenty of time to load WASM and process init
    // 1000ms to be extra safe
    setTimeout(() => {
      console.log("Prewarmed decoder worker ready");
      resolve();
    }, 1000);
  });
  
  return prewarmedWorkerReady;
};

// Get the prewarmed worker after waiting for it to be ready
// Returns null if prewarm wasn't called or if worker had errors