def beat_position(self, position):
"""
Get the beat position corresponding to given position.
:param position:
:return: BeatPosition
"""
conversion = TimeConversion(self.tempo_sequence,
self.time_signature_sequence,
Position(self.duration.duration))
return conversion.position_to_bp(Position(position.position))
def verify(self, pdi):
"""
Verify that the beat constraint holds.
:param pdi: PositionDeltaInfo.
:return: True/False on meeting constraint.
"""
conversion = TimeConversion(pdi.tempo_event_sequence,
pdi.ts_event_sequence,
Position(pdi.line_duration()))
new_position = pdi.correct_position(self.actor.get_absolute_position())
beat_position = conversion.position_to_bp(new_position)
if beat_position.beat_fraction > 0:
return False
beat = beat_position.beat
ts = pdi.ts_event_sequence.floor_event(new_position).object
beat_list = self.beat_ids if self.beat_ids is not None else ts.beats_matching(
self.beat_type)
return beat in beat_list
def beat_duration(self):
duration = self.duration
conversion = TimeConversion(self.tempo_sequence,
self.time_signature_sequence,
Position(self.duration.duration))
return conversion.position_to_bp(Position(duration.duration))
def test_position_to_bp(self):
tempo_line = EventSequence(TempoEvent(Tempo(60), Position(0)))
ts_line = EventSequence(
TimeSignatureEvent(TimeSignature(3, Duration(1, 4)), Position(0)))
conversion = TimeConversion(tempo_line, ts_line, Position(2, 1))
bp = conversion.position_to_bp(Position(1, 2))
print(bp)
self.assertTrue(bp == BeatPosition(0, 2),
'bp is {0}, not BP[0, 2]'.format(bp))
bp = conversion.position_to_bp(Position(1))
print(bp)
self.assertTrue(bp == BeatPosition(1, 1),
'bp is {0}, not BP[1 ,1]'.format(bp))
tempo_line = EventSequence([
TempoEvent(Tempo(60), Position(0)),
TempoEvent(Tempo(20), Position(4, 4))
])
ts_line = EventSequence([
TimeSignatureEvent(TimeSignature(3, Duration(1, 4)), Position(0)),
TimeSignatureEvent(TimeSignature(2, Duration(1, 8)),
Position(6, 4))
])
conversion = TimeConversion(tempo_line, ts_line, Position(2, 1))
bp = conversion.position_to_bp(Position(5, 4))
print(bp)
self.assertTrue(bp == BeatPosition(1, 2),
'bp is {0}, not BP[1, 2]'.format(bp))
bp = conversion.position_to_bp(Position(13, 8))
print(bp)
self.assertTrue(bp == BeatPosition(2, 1),
'bp is {0}, not BP[2, 1]'.format(bp))
tempo_line = EventSequence([
TempoEvent(Tempo(60), Position(0)),
TempoEvent(Tempo(20), Position(4, 4))
])
ts_line = EventSequence([
TimeSignatureEvent(TimeSignature(4, Duration(1, 4)), Position(0)),
TimeSignatureEvent(TimeSignature(3, Duration(1, 4)),
Position(5, 2))
])
conversion = TimeConversion(tempo_line, ts_line, Position(4),
Duration(1, 2))
# pickup
bp = conversion.position_to_bp(Position(0))
print(bp)
self.assertTrue(bp == BeatPosition(0, 2),
'bp is {0}, not BP[0, 2]'.format(bp))
bp = conversion.position_to_bp(Position(1, 4))
print(bp)
self.assertTrue(bp == BeatPosition(0, 3),
'bp is {0}, not BP[0, 3]'.format(bp))
# measure 1
bp = conversion.position_to_bp(Position(1, 2))
print(bp)
self.assertTrue(bp == BeatPosition(1, 0),
'bp is {0}, not BP[1, 0]'.format(bp))
bp = conversion.position_to_bp(Position(3, 4))
print(bp)
self.assertTrue(bp == BeatPosition(1, 1),
'bp is {0}, not BP[1, 1]'.format(bp))
bp = conversion.position_to_bp(Position(1, 1))
print(bp)
self.assertTrue(bp == BeatPosition(1, 2),
'bp is {0}, not BP[1, 2]'.format(bp))
bp = conversion.position_to_bp(Position(5, 4))
print(bp)
self.assertTrue(bp == BeatPosition(1, 3),
'bp is {0}, not BP[1, 3]'.format(bp))
# measure 2
bp = conversion.position_to_bp(Position(3, 2))
print(bp)
self.assertTrue(bp == BeatPosition(2, 0),
'bp is {0}, not BP[2, 0]'.format(bp))
bp = conversion.position_to_bp(Position(7, 4))
print(bp)
self.assertTrue(bp == BeatPosition(2, 1),
'bp is {0}, not BP[2, 1]'.format(bp))
bp = conversion.position_to_bp(Position(2, 1))
print(bp)
self.assertTrue(bp == BeatPosition(2, 2),
'bp is {0}, not BP[2, 2]'.format(bp))
bp = conversion.position_to_bp(Position(9, 4))
print(bp)
self.assertTrue(bp == BeatPosition(2, 3),
'bp is {0}, not BP[2, 3]'.format(bp))
# measure 3
bp = conversion.position_to_bp(Position(5, 2))
print(bp)
self.assertTrue(bp == BeatPosition(3, 0),
'bp is {0}, not TS[3, 0]'.format(bp))
bp = conversion.position_to_bp(Position(11, 4))
print(bp)
self.assertTrue(bp == BeatPosition(3, 1),
'bp is {0}, not TS[3, 1]'.format(bp))
bp = conversion.position_to_bp(Position(3, 1))
print(bp)
self.assertTrue(bp == BeatPosition(3, 2),
'bp is {0}, not TS[3, 2]'.format(bp))
# measure 4
bp = conversion.position_to_bp(Position(13, 4))
print(bp)
self.assertTrue(bp == BeatPosition(4, 0),
'bp is {0}, not BP[4, 0]'.format(bp))
bp = conversion.position_to_bp(Position(7, 2))
print(bp)
self.assertTrue(bp == BeatPosition(4, 1),
'bp is {0}, not BP[4, 1]'.format(bp))
bp = conversion.position_to_bp(Position(15, 4))
print(bp)
self.assertTrue(bp == BeatPosition(4, 2),
'bp is {0}, not BP[4, 2]'.format(bp))
