DMX to Keystroke Input

I am looking to be able to have a DMX signal be converted into a keystroke on either a PC or a Mac.  I would like to be able to set keys and macros to be able to fire based on an established address. Example:

One macro to be able to push 

1 Control Cue Lab by pushing space bar via DMX

2 Switch Video input on Analog Way Web RCS with established hot keys 

3 Go to video look on ion 

Next macro 

1 Back to show

2 Take content on Web RCS 

I figure I might be able to have a DMX in to an Arduino to a keyboard encoder out or have that all done though Raspberry Pi.  Has anyone done something like this before? (not including Rosco's discontinued Keystroke) 

Thanks!