How to infer gene-level CNV status from ICGC data?

Question

[lincaijin1994]

I've downloaded copy number data from ICGC portal but I found it provided only the mutation type (copy neutral, copy neutral LOH, gain, loss) and segment mean (integer) for each segment but not the copy number alterations status (-2, -1, 0, 1, 2) for specific genes. I'm wondering how to estimate the gene-level copy number alteration status.