video: Add HDR colorimetry values
The following discussion from !130 (merged) should be addressed:
Slightly unrelated, we should probably also add the SMPTE ST 2084 transfer function to the colorimetry? @seungha.yang are you aware of other things to be added to the colorimetry (transfer function, matrix, primaries) for the other HDR specs?
There's also BT.2100 hybrid log gamma it seems. Let's handle those in a separate MR, they're easy to add and can even be added now without this API. Just an enum value and copying the formula into the code.
We should check if there are also others to add in addition to those two, or other matrix/primaries.