class MusicPlayer(EventDispatcher):
def __init__(self, midiFile, **kw):
self.tempo = 80
self.metronome = self._set_up_metronome()
self.watchers = set()
self.file_player = MidiFilePlayer(midiFile)
self.beat_length = self.file_player.beat_length
self.register_event_type('on_bar')
# Can add a flag for repeating
self.file_player.bind(status=self.schedule_music)
self.file_player.bind(bar_number=self.on_bar)
super(MusicPlayer, self).__init__(**kw)
def _set_up_metronome(self):
metronome = Track()
bar = Bar('C', (4, 4))
metronome.add_bar(bar)
kick = MidiPercussion.BassDrum1
kick.velocity = 120
for i in range(4):
bar.place_notes(kick, value.quarter)
return metronome
def on_bar(self, inst, bar_number):
if bar_number:
print('bar {}'.format(bar_number))
for watcher in self.watchers:
watcher.dispatch('on_bar', bar_number)
def start(self):
self.schedule_music(None, PlayStatus.Start)
def schedule_music(self, inst, status):
if status == PlayStatus.Start:
Clock.schedule_once(self.file_player.play)
def stop(self):
# Unfortunately, this throws a bunch of assertions and does nothing.
self.file_player.stop()