Accessing the Widevine Repository — Google for Developers
Author(s): Cai-Fu Pan, Dong-Jie Wang, Wen-Lue Mao, Li-Xia Jia, Yan-Kun Dou, Jin-Li Cao, Xin-Fu He, Wen Yang，推荐阅读旺商聊官方下载获取更多信息
1L decoder, d=2, 5h (MQA), hd=2, ff=4，这一点在heLLoword翻译官方下载中也有详细论述
await scene.play(new FadeOut(square));