class LilypondNotePlayer:
def __init__(self, beatsPerMinute, beatUnit, tuningSystem, note, samplingRate = 44100):
self.note = note
self.volume = 1 # Full colume for starters
self.samplingRate = samplingRate
# How many samples will I have to play?
self.totalSamples = int(beatUnit * samplingRate * 60 / (note.duration * beatsPerMinute))
if self.note.times != None:
self.totalSamples /= self.note.times
if note.dots:
self.totalSamples = int(self.totalSamples * ( 2.0 - pow(2, - note.dots)))
self.wave = Wave(tuningSystem.getFrequency(note), samplingRate)
self.counter = 0
self.volumeRate = None
self.tied = False
def getNextValue(self):
self.counter+=1
# Do we have to lower the volume?
if not self.tied and self.totalSamples - self.counter <= self.samplingRate * 0.05: # 5 hundredths of a second
# Have to calculate a volume rate
if self.totalSamples <= self.counter:
self.volumeRate = 0
else:
self.volumeRate = math.exp(math.log(0.01) / (self.totalSamples - self.counter))
sys.stderr.flush()
if self.volumeRate != None:
self.wave.setVolume(self.volume * self.volumeRate)
return self.wave.getNextValue()
def setTied(self, value):
self.tied = value
def isTied(self):
return self.tied
def isFinished(self):
return self.counter >= self.totalSamples
def setNewDuration(self, totalSamples):
self.counter = 0
self.totalSamples = totalSamples
def getAngle(self):
return self.wave.getAngle()
def setAngle(self, angle):
self.wave.setAngle(angle)
def getFrequency(self):
return self.wave.getFrequency()
class TrackPlayer:
"""
Will play a note that's provided to it
"""
def __init__(self, system, samplingRate = 44100):
self.system = system
self.wave = None
self.samplingRate = samplingRate
self.samplesToMute = None
def play(self, musicalNote):
if musicalNote == None:
self.mute()
else:
self.wave = Wave(self.system.getFrequency(musicalNote), self.samplingRate)
self.samplesToMute = None
def mute(self, samplesToMute = None):
if samplesToMute == None:
# mute inmediately
self.volume=0
if self.wave != None:
self.wave.setVolume(0)
else:
self.samplesToMute = samplesToMute
# What is the rate for each volume decrease to apply?
self.volume=1
self.decrementRate = math.exp(math.log(0.01) / samplesToMute)
def getNextValue(self):
if self.wave == None:
return 0
if self.samplesToMute != None:
self.samplesToMute -= 1
# The volume?
self.volume*=self.decrementRate
self.wave.setVolume(self.volume)
return self.wave.getNextValue()
def getFrequency(self):
if self.wave == None:
return None
else:
return self.wave.getFrequency()
class TrackPlayer:
"""
Will play a note that's provided to it
"""
def __init__(self, system, samplingRate=44100):
self.system = system
self.wave = None
self.samplingRate = samplingRate
self.samplesToMute = None
def play(self, musicalNote):
if musicalNote == None:
self.mute()
else:
self.wave = Wave(self.system.getFrequency(musicalNote),
self.samplingRate)
self.samplesToMute = None
def mute(self, samplesToMute=None):
if samplesToMute == None:
# mute inmediately
self.volume = 0
if self.wave != None:
self.wave.setVolume(0)
else:
self.samplesToMute = samplesToMute
# What is the rate for each volume decrease to apply?
self.volume = 1
self.decrementRate = math.exp(math.log(0.01) / samplesToMute)
def getNextValue(self):
if self.wave == None:
return 0
if self.samplesToMute != None:
self.samplesToMute -= 1
# The volume?
self.volume *= self.decrementRate
self.wave.setVolume(self.volume)
return self.wave.getNextValue()
def getFrequency(self):
if self.wave == None:
return None
else:
return self.wave.getFrequency()
class LilypondNotePlayer:
def __init__(self,
beatsPerMinute,
beatUnit,
tuningSystem,
note,
samplingRate=44100):
self.note = note
self.volume = 1 # Full colume for starters
self.samplingRate = samplingRate
# How many samples will I have to play?
self.totalSamples = int(beatUnit * samplingRate * 60 /
(note.duration * beatsPerMinute))
if self.note.times != None:
self.totalSamples /= self.note.times
if note.dots:
self.totalSamples = int(self.totalSamples *
(2.0 - pow(2, -note.dots)))
self.wave = Wave(tuningSystem.getFrequency(note), samplingRate)
self.counter = 0
self.volumeRate = None
self.tied = False
def getNextValue(self):
self.counter += 1
# Do we have to lower the volume?
if not self.tied and self.totalSamples - self.counter <= self.samplingRate * 0.05: # 5 hundredths of a second
# Have to calculate a volume rate
if self.totalSamples <= self.counter:
self.volumeRate = 0
else:
self.volumeRate = math.exp(
math.log(0.01) / (self.totalSamples - self.counter))
sys.stderr.flush()
if self.volumeRate != None:
self.wave.setVolume(self.volume * self.volumeRate)
return self.wave.getNextValue()
def setTied(self, value):
self.tied = value
def isTied(self):
return self.tied
def isFinished(self):
return self.counter >= self.totalSamples
def setNewDuration(self, totalSamples):
self.counter = 0
self.totalSamples = totalSamples
def getAngle(self):
return self.wave.getAngle()
def setAngle(self, angle):
self.wave.setAngle(angle)
def getFrequency(self):
return self.wave.getFrequency()
