midi2joypad.py

#!/usr/bin/env python3

import time
from rtmidi.midiutil import open_midiinput

from subprocess import call

import uinput

axis_cal = (0, 255, 0, 0)
cstick_cal = (0, 255, 0, 0)
trigger_cal = (0, 255, 0, 0)

events = (
	uinput.BTN_NORTH,
	uinput.BTN_SOUTH,
	uinput.BTN_EAST,
	uinput.BTN_WEST,
	uinput.BTN_START,
	uinput.BTN_DPAD_UP,
	uinput.BTN_DPAD_DOWN,
	uinput.BTN_DPAD_LEFT,
	uinput.BTN_DPAD_RIGHT,
	uinput.ABS_X + axis_cal,
	uinput.ABS_Y + axis_cal,
	uinput.ABS_RX + cstick_cal,
	uinput.ABS_RY + cstick_cal,
	uinput.BTN_TL,
	uinput.ABS_Z + trigger_cal,
	uinput.BTN_TR,
	uinput.ABS_RZ + trigger_cal,
	uinput.BTN_TR2
)

controller = uinput.Device(events, name="midi2joypad")


midi_in, port_name = open_midiinput(None)

print("Nice.")

digital_map = {
	24: uinput.BTN_START, # lowest C
	36: uinput.BTN_DPAD_RIGHT, # low C
	31: uinput.BTN_DPAD_LEFT, # lowest G
	76: uinput.BTN_SOUTH, # high E
	77: uinput.BTN_DPAD_DOWN, # high F
	72: uinput.BTN_WEST, # high C
	88: uinput.BTN_TR2, # very high E
}

try:
	timer = time.time()
	
	while True:
		msg = midi_in.get_message()
		
		if msg:
			message, deltatime = msg
			timer += deltatime
			
			note = message[1]
			velocity = message[2]
			
			if note in digital_map:
				value = 1
				
				if velocity == 0:
					value = 0
			
				print("Output: " + str(digital_map[note]) + " " + str(value))
				
				controller.emit(digital_map[note], value, syn=True)
			
			print("[%s] @%0.6f %r" % (port_name, timer, message))
		
		controller.syn()
		time.sleep(0.008)
except KeyboardInterrupt:
	print("")
finally:
	print("Aaight.")
	midi_in.close_port()
	del midi_in