Function play

static/js/chunkedAudioEngine.js:312–344

()

  // --- public API ---

  function play() {
    if (playing || destroyed) return;
    if (ctx.state === "suspended") ctx.resume().catch(() => {});
    playing = true;

    const chunkIdx = Math.floor(_startOffset / CHUNK_SEC);
    const offsetWithin = _startOffset - chunkIdx * CHUNK_SEC;

    const startWith = (buffers) => {
      if (!playing || destroyed) return;
      const when = ctx.currentTime + 0.05;
      _startCtxTime = when;
      const dur = _scheduleChunk(buffers, when, offsetWithin);
      _scheduledTo = _startOffset + dur;
      _audioStarted = true;
      _fetchChunk(chunkIdx + 1); // pre-fetch next chunk
      rafId = requestAnimationFrame(_tick);
    };

    // chunk 0 is pre-decoded during ready(), so the sync path is the hot path.
    const hit = _cache.get(chunkIdx);
    if (hit?.result) {
      startWith(hit.result);
    } else {
      _fetchChunk(chunkIdx)
        .then(startWith)
        .catch((e) => {
          console.warn("[chunked] play fetch failed:", e);
          playing = false;
          _audioStarted = false;
        });
    }
  }

  function pause() {
    if (!playing) return;