C++ enum用法小技巧
enum DeviceDataType :int
{
None = 0,
SourceRGBA32 = 1,
Keying = 2,
TransportYUVA = 4,
};
当声明一个DeviceDataType type = 7;时,type相当于SourceRGBA32 || Keying ||TransportYUVA,也就是type == SourceRGBA32,type == Keying,type == TransportYUVA都是true。