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#!/usr/bin/env python
#
# midiin_poll.py
#
"""Show how to receive MIDI input by polling an input port."""
from __future__ import print_function
import logging
import sys
import time
from rtmidi.midiutil import open_midiinput
log = logging.getLogger('midiin_poll')
logging.basicConfig(level=logging.DEBUG)
# Prompts user for MIDI input port, unless a valid port number or name
# is given as the first argument on the command line.
# API backend defaults to ALSA on Linux.
port = sys.argv[1] if len(sys.argv) > 1 else None
try:
midiin, port_name = open_midiinput(port)
except (EOFError, KeyboardInterrupt):
sys.exit()
print("Entering main loop. Press Control-C to exit.")
try:
timer = time.time()
while True:
msg = midiin.get_message()
if msg:
message, deltatime = msg
timer += deltatime
print("[%s] @%0.6f %r" % (port_name, timer, message))
time.sleep(0.01)
except KeyboardInterrupt:
print('')
finally:
print("Exit.")
midiin.close_port()
del midiin
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