Shooter jumps into the airborne defender

[WyMike]

A1 drives to the goal for a jumpshot from the baseline and jumps forward just outside the key with the ball outstretched for the try. B1 anticipates A1's drive and moves across the lane and also jumps to block A1's try attempt. Both A1 and B1 leave the floor simultaneously and are airborne moving towards each other. Contact is made at the midway point between the two players at the heights of their jumps and the try is successful. No call or call on whom?