#!/usr/bin/env python3

'''JACK client for filtering out stop (0xfc) messages'''

import jack

client = jack.Client('MIDI filter')
inport = client.midi_inports.register('input')
outport = client.midi_outports.register('output')

stop = bytes.fromhex('fc')

@client.set_process_callback
def process(frames):
    outport.clear_buffer()
    for offset, data in inport.incoming_midi_events():
        if data == stop:
            continue
        outport.write_midi_event(offset, data)


with client:
    print('#' * 80)
    print('press Return to quit')
    print('#' * 80)
    input()