Source - Updating the Decklink API

Hi everybody,

What would it take to update the decklink API on a custom source build? I see that the 2.1 branch is currently on 10.4, and I've downloaded the 10.4 decklink SDK from the Blackmagic site, but I don't see an obvious connection between the files provided by Blackmagic and the files at "modules/decklink".

Could someone point me in the right direction?

Thank you!