tmidi_handler.py - dmt - source code for the kunsthal art installation
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       tmidi_handler.py (2006B)
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            1 #!/usr/bin/env python3
            2 # See LICENSE file for copyright and license details.
            3 """
            4 MIDI listener daemon for the Caller Station
            5 """
            6 
            7 from subprocess import Popen
            8 import mido
            9 
           10 from config import (device_name)
           11 
           12 
           13 def make_call():
           14     # DISPLAY=:0 xdotool key 1 2 3 Return
           15     print('Popping the mechanical turk')
           16     Popen(['xdotool', 'key', '1', '2', '3', 'Return'],
           17           env={'DISPLAY': ':0'})
           18 
           19 
           20 def cancel_call():
           21     print('Popping the mechanical turk')
           22     Popen(['xdotool', 'key', 'Escape'],
           23           env={'DISPLAY': ':0'})
           24 
           25 def main():
           26     print('Opening the MIDI input listener')
           27     midi_in = mido.open_input(device_name)
           28     for msg in midi_in:
           29         print('Got MIDI message!')
           30         #print('Type:', msg.type)
           31         #print('Time:', msg.time)
           32         #print('Velocity:', msg.velocity)
           33         #print('Note:', msg.note)
           34         #print('Channel:', msg.channel)
           35         #print('Bytes:', msg.bytes())
           36         #print('Bin:', msg.bin())
           37         #print('Hex:', msg.hex())
           38         print('Dict:', msg.dict())
           39         midi_dict = msg.dict()
           40 
           41         # a control change
           42         #mtype = midi_dict.get('type')
           43         #mtime = midi_dict.get('time')
           44         #mctl = midi_dict.get('control')
           45         #mval = midi_dict.get('value')
           46         #mchan = midi_dict.get('channel')
           47 
           48         # a note_on
           49         mtype = midi_dict.get('type')
           50         mtime = midi_dict.get('time')
           51         mnote = midi_dict.get('note')
           52         mvelo = midi_dict.get('velocity')
           53         mchan = midi_dict.get('channel')
           54 
           55         if mtype == 'note_on' and mtime == 0 and mnote == 60 \
           56                 and mchan == 0:
           57             make_call()
           58             print('Got MIDI 60. Making call.')
           59         elif mtype == 'note_on' and mtime == 0 and mnote == 63 \
           60                 and mchan == 0:
           61             cancel_call()
           62             print('Got MIDI 63. Cancelling call.')
           63 
           64 
           65         print('---')
           66 
           67     # Try this out too:
           68     #while True:
           69     #    for msg in midi_in.iter_pending():
           70     #        print(msg)
           71 
           72 
           73 if __name__ == '__main__':
           74     main()