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#!/usr/bin/env python3
# SPDX-FileCopyrightText: 2013 Ole Martin Bjorndalen <ombdalen@gmail.com>
#
# SPDX-License-Identifier: MIT
"""
Play MIDI file on output port.
Example:
mido-play some_file.mid
Todo:
- add option for printing messages
"""
import argparse
import sys
import mido
from mido import Message, MidiFile, tempo2bpm
def parse_args():
parser = argparse.ArgumentParser(description=__doc__)
arg = parser.add_argument
arg('-o', '--output-port',
help='Mido port to send output to')
arg('-m', '--print-messages',
dest='print_messages',
action='store_true',
default=False,
help='Print messages as they are played back')
arg('-q', '--quiet',
dest='quiet',
action='store_true',
default=False,
help='print nothing')
arg('files',
metavar='FILE',
nargs='+',
help='MIDI file to play')
return parser.parse_args()
def play_file(output, filename, print_messages):
midi_file = MidiFile(filename)
print(f'Playing {midi_file.filename}.')
length = midi_file.length
print('Song length: {} minutes, {} seconds.'.format(
int(length / 60),
int(length % 60)))
print('Tracks:')
for i, track in enumerate(midi_file.tracks):
print(f' {i:2d}: {track.name.strip()!r}')
for message in midi_file.play(meta_messages=True):
if print_messages:
sys.stdout.write(repr(message) + '\n')
sys.stdout.flush()
if isinstance(message, Message):
output.send(message)
elif message.type == 'set_tempo':
print('Tempo changed to {:.1f} BPM.'.format(
tempo2bpm(message.tempo)))
print()
def main():
args = parse_args()
if args.quiet:
global print
def print(*args):
pass
try:
with mido.open_output(args.output_port) as output:
print(f'Using output {output.name!r}.')
output.reset()
try:
for filename in args.files:
play_file(output, filename, args.print_messages)
finally:
print()
output.reset()
except KeyboardInterrupt:
pass
if __name__ == '__main__':
main()
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