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sequence.py
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sequence.py
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from copy import deepcopy
from .models import Event, MuteEvent, Pattern, PatternEvent, StopEvent
class Sequence:
# TODO: next() returns a Pattern (use repetitions from PatternEvent)
def __init__(self, tempo=120, events=[]):
self.tempo = tempo
self._events = events
# Get pulsestamp of stop event
if self._events:
last_event = self._events[-2] # -1 is mutes event
stop_event = StopEvent(
last_event.pulsestamp
+ last_event.pattern.length
* last_event.repetitions
* 24 * 4
)
self._events.append(stop_event)
self._events_blueprint = deepcopy(self._events) # For reset
@classmethod
def from_raw_data(cls, raw_data):
events = []
last_event_pulses = 0
for index, event in enumerate(raw_data['sequence']):
pattern = Pattern(
event['pattern'],
event['bank'],
event['length'],
)
if index != 0:
last_event_pulses += (
pattern.length
* event['repetitions']
* 24 * 4
)
pattern_event = PatternEvent(
0 if index == 0 else last_event_pulses - 24,
pattern,
event['repetitions'],
)
events.append(pattern_event)
mute_event = MuteEvent(
0 if index == 0 else last_event_pulses - 1,
event['mutes']
)
events.append(mute_event)
return cls(raw_data['tempo'], events)
def get_event(self, pulsestamp: int) -> Event:
if len(self._events) > 0:
next_event = self._events[0]
if next_event.pulsestamp == pulsestamp:
return self._events.pop(0)
def reset(self):
self._events = deepcopy(self._events_blueprint)