Open source Bridge (card game) engine?

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C++

C

Python

Hello all,
Long shot, but I'm thinking of building a bridge card player, ideally for the pi, but not necessarily (the pi might be far too slow). I can use opencv for card recognition (holding cards up to the camera), & have ideas for the rest of the i/o, but I really don't want to write a playing engine (wouldn't know where to start, for a start!).

Is there anything available? Ideally, I'd like to feed it hands, & have it pass card play information back to my code. I can't find anything obvious.

My goal is to have a machine that can act as a 4th player at the table.

Thanks!