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import random
import Config
from Generation.GenerationConstants import GenerationConstants
from Generation.Utils import *
class GenRythm:
def drumRythmSequence(self, instrument, nbeats, density, regularity ):
rythmSequence = []
binSelection = []
downBeats = []
upBeats = []
beats = []
countDown = 0
onsetTime = None
if Config.INSTRUMENTS[ instrument ].instrumentRegister == Config.PUNCH:
registerDensity = 0.5
downBeatRecurence = 4
downBeats = GenerationConstants.DRUM_PUNCH_PROB[ nbeats ]
for downBeat in downBeats:
upBeats.append( ( downBeat[ 0 ] + Config.TICKS_PER_BEAT , downBeat[ 1 ] ) )
if Config.INSTRUMENTS[ instrument ].instrumentRegister == Config.LOW:
registerDensity =1
downBeatRecurence = 4
downBeats = GenerationConstants.DRUM_LOW_PROB[ nbeats ]
for downBeat in downBeats:
upBeats.append( ( downBeat[ 0 ] + Config.TICKS_PER_BEAT / 2 , downBeat[ 1 ] ) )
if Config.INSTRUMENTS[ instrument ].instrumentRegister == Config.MID:
registerDensity = .75
downBeatRecurence = 1
downBeats = GenerationConstants.DRUM_MID_PROB[ nbeats ]
for downBeat in downBeats:
upBeats.append( ( downBeat[ 0 ] + Config.TICKS_PER_BEAT / 4 , downBeat[ 1 ] ) )
if Config.INSTRUMENTS[ instrument ].instrumentRegister == Config.HIGH:
registerDensity = 1.5
downBeatRecurence = 1
downBeats = GenerationConstants.DRUM_HIGH_PROB[ nbeats ]
for downBeat in downBeats:
upBeats.append( ( downBeat[ 0 ] + Config.TICKS_PER_BEAT / 4 , downBeat[ 1 ] ) )
realDensity = density * registerDensity
if realDensity > 1.:
realDensity = 1.
list = range( int( realDensity * len( downBeats ) ) )
for i in list:
if random.random() < ( regularity * downBeatRecurence ) and binSelection.count( 1 ) < len( downBeats ):
binSelection.append( 1 )
else:
if binSelection.count( 0 ) < len( downBeats ):
binSelection.append( 0 )
else:
binSelection.append( 1 )
countDown = binSelection.count( 1 )
for i in range( countDown ):
while onsetTime in rythmSequence or onsetTime == None:
onsetTime = prob2( downBeats )
rythmSequence.append( onsetTime )
for i in range( len( binSelection ) - countDown ):
while onsetTime in rythmSequence or onsetTime == None:
onsetTime = prob2( upBeats )
rythmSequence.append( onsetTime )
rythmSequence.sort()
return rythmSequence
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