let lastSkipIndex = -1;
let lastDanmuLoadedUntil = -1;
let danmuConfig = {
	loadedUntil: 0,
	segmentDuration: 10
}
art.on("video:timeupdate", () => {
    const currentTime = art.currentTime;

    // 弹幕分段加载
    let episode_number = "43";
	debugger
    if (episode_number in allDanmaku) {
      let danmuList = allDanmaku[episode_number];
      let current = art.currentTime;
      if (current >= danmuConfig.loadedUntil) {
        // 避免重复加载同一段
        if (danmuConfig.loadedUntil === lastDanmuLoadedUntil) return;
        lastDanmuLoadedUntil = danmuConfig.loadedUntil;

        if (
          danmuConfig.loadedUntil === 0 ||
          (current - danmuConfig.loadedUntil) > (danmuConfig.segmentDuration * 2)
        ) {
          danmuConfig.loadedUntil = current - 5;
        }
        const startTime = danmuConfig.loadedUntil;
        const endTime = startTime + danmuConfig.segmentDuration;
        const startIndex = sortedIndexBy(danmuList, { time: danmuConfig.loadedUntil }, o => o.time);
        const segment = danmuList.slice(startIndex).filter(d => d.time < endTime);
        if (segment.length) {
          art.plugins.artplayerPluginDanmuku.load(segment); // 追加弹幕
        }
        danmuConfig.loadedUntil = endTime;
      }
    }
  });




  function sortedIndexBy(array, value, iteratee) {
  if (typeof iteratee !== 'function') {
    throw new TypeError('iteratee must be a function');
  }

  var val = iteratee(value);
  var low = 0;
  var high = array.length;

  while (low < high) {
    var mid = (low + high) >>> 1;
    // compute ranking for the midpoint element
    var midVal = iteratee(array[mid]);
    if (midVal < val) {
      low = mid + 1;
    } else {
      high = mid;
    }
  }

  return low;
}