def __init__(self, bpm=None, stop_seconds=60):
# TODO: stop_seconds is nice, but we don't we really want stop_beats or stop_bars
# or something?
assert bpm is not None
self.timeline = Timeline()
self.got_events = False # if we don't get any musical events, the performance will stop
self.stop_seconds = stop_seconds
self.bpm = bpm
# FIXME: this needs to be calculated off of tempo, change to BPM shortly.
self.whole_note_length = ( 60 / 120) * 4
super().__init__()
class Performance(Member):
"""
Somewhat of a misnomer, the realtime output doesn't really output anything.
However, it does throw away events that aren't musically relevant, and records
whether the performance is done or not by way of the special 'got_events' flag.
The actual processing of the realtime timeline and actual realtime work is mainly
in the conductor class. This then, could technically be called "Audience" and may
be renamed.
"""
def __init__(self, bpm=None, stop_seconds=60):
# TODO: stop_seconds is nice, but we don't we really want stop_beats or stop_bars
# or something?
assert bpm is not None
self.timeline = Timeline()
self.got_events = False # if we don't get any musical events, the performance will stop
self.stop_seconds = stop_seconds
self.bpm = bpm
# FIXME: this needs to be calculated off of tempo, change to BPM shortly.
self.whole_note_length = ( 60 / 120) * 4
super().__init__()
def on_signal(self, event, start_time, end_time):
print(event)
if event.duration is None:
event.duration = 0.25
if event.velocity is None:
event.velocity = 127
if (event.notes is None or len(event.notes) == 0) and event.keep_alive:
# an empty set of notes is ok under certain conditions
print("FIXED!")
self.got_events = True
return
if end_time >= self.stop_seconds:
self.got_events = False
return
event = event.copy()
self.timeline.add_event(event)
event_off = event.copy()
event_off.off = True
# if we passed through the subdivide middleware shorten the length
# before we play it.
subdivide = event_off.flags.get('subdivide', 1)
event_off.duration = event_off.duration / subdivide
offset = event.duration * self.whole_note_length
event_off.time = event.time + offset
#print("OFF EVENT is %s in the future" % (offset))
self.timeline.add_event(event_off)
self.got_events = True
