Dualshock 3 for player 1. Xbox 360 for player 2. Is it possible?

I’m using 1.6.4 on a Windows 10 pc.

I have a PS3 controller bluetoothed in through Scarlet Crush’s Xbox Input Wrapper, and I’m trying to get User 2 to recognize my Xbox 360 Controller (wireless through the Microsoft Xbox 360 reciever I have), but it doesn’t seem to work.

A cursory Google search turned this up on reddit, but the most upvoted comment merely recommends using a different program which I don’t want to do.

So the official word on PS3 Player 1, Xbox 360 Player 2 in RetroArch? Be nice if I could get this working, but no big deal if it’s a non-starter. Keep up the great work libretro team!