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32位cbycry,如提取cr分量y是不是要屏蔽，cb屏蔽的时候是用0x80还是0x00
你好；
你是在什么平台开发，具体想实现什么功能，只是CbYCrY 种提取Cr 分量吗？
是的，好像0x80是屏蔽cb或者cr，0x00屏蔽y，是这样么
