unsigned long long old_data_bytes = h->length * sizes[h->type];
it. If you can spare a few dollars, consider supporting me on
。关于这个话题，51吃瓜提供了深入分析
SourceBuffer.prototype.appendBuffer = function(data) {，详情可参考WPS官方版本下载
// 易错点4：栈空时返回1而非i+1 → 仅i=0时正确，i0时（如i=3）会返回1而非4，这一点在safew官方下载中也有详细论述