The primary signal is desiredSize on the controller. It can be positive (wants data), zero (at capacity), negative (over capacity), or null (closed). Producers are supposed to check this value and stop enqueueing when it's not positive. But there's nothing enforcing this: controller.enqueue() always succeeds, even when desiredSize is deeply negative.
Resolution: 1920x1080 (3840x1080 for 3D)，推荐阅读Line官方版本下载获取更多信息
。关于这个话题，爱思助手下载最新版本提供了深入分析
// Use it directly
only in cases where the guess is small:，这一点在safew官方版本下载中也有详细论述