diff synpy/music_objects.py @ 72:ef891481231e

reorganising the repo in a major way ready for going public

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/synpy/music_objects.py	Tue May 12 08:53:12 2015 +0100
@@ -0,0 +1,286 @@
+
+from basic_functions import ceiling, string_to_sequence, calculate_bar_ticks, velocity_sequence_to_min_timespan
+import parameter_setter 
+import rhythm_parser 
+
+class Note():
+	def __init__(self, firstarg = None, duration = None, velocity = None):
+		self.startTime = 0
+		self.duration = 0
+		self.velocity = 0
+
+		if firstarg != None:
+			if isinstance(firstarg,basestring):
+				intlist = string_to_sequence(firstarg,int)
+				self.startTime = intlist[0]
+				self.duration = intlist[1]
+				self.velocity = intlist[2]
+			elif isinstance(firstarg,int):
+				self.startTime = firstarg
+
+		if duration != None:
+			self.duration = duration
+		if velocity != None:
+			self.velocity = velocity
+
+
+	def to_string(self):
+		return "(%d,%d,%f)" %(self.startTime, self.duration, self.velocity)
+
+
+# NoteSequence is a list of Note
+class NoteSequence(list):
+	def __init__(self, noteSequenceString = None):
+		if noteSequenceString != None:
+			self.string_to_note_sequence(noteSequenceString)
+
+	def string_to_note_sequence(self, noteSequenceString):
+		noteSequenceString = rhythm_parser.discard_spaces(noteSequenceString)
+		# try:
+			# Turning "(1,2,3),(4,5,6),(7,8,9)" into ["1,2,3","4,5,6,","7,8,9"]
+		listStrings = noteSequenceString[1:-1].split("),(")
+		for localString in listStrings:
+			self.append(Note(localString))
+
+	def to_string(self):
+		noteSequenceString = ""
+		for note in self:
+			noteSequenceString += note.to_string() + ","
+		return noteSequenceString[:-1]
+
+
+class NormalisedVelocityValueOutOfRange(Exception):
+	def __init__(self, value):
+		self.value = value
+	def __str__(self):
+		return repr(self.value)
+
+# VelocitySequence is a list of float numbers
+class VelocitySequence(list):
+	def __init__(self, velocitySequence = None):
+		if velocitySequence != None:
+			if isinstance(velocitySequence,basestring):
+				self.string_to_velocity_sequence(velocitySequence)
+			elif isinstance(velocitySequence, list):
+				self+=velocitySequence
+
+	def string_to_velocity_sequence(self,inputString):
+		
+		def convert_velocity_value(argstring):
+			value = float(argstring)
+			if value>=0 and value<=1:
+				return value
+			else:
+				raise NormalisedVelocityValueOutOfRange("Value: "+argstring+" in " + inputString)
+
+		self.extend(string_to_sequence(inputString,convert_velocity_value))
+
+
+	def to_string(self):
+		return str(velocity_sequence_to_min_timespan(self))[1:-1].replace(" ","")
+
+
+def velocity_sequence_to_note_sequence(velocitySequence, nextbarVelocitySequence = None):
+	
+	noteSequence = NoteSequence()
+
+	for index in range(len(velocitySequence)):
+		if (velocitySequence[index]!= 0): # onset detected
+			startTime = index			
+			velocity = velocitySequence[index]
+
+			# if there are previous notes added
+			if( len(noteSequence) > 0):
+				previousNote = noteSequence[-1]
+				previousNote.duration = startTime - previousNote.startTime
+
+			# add the current note into note sequence
+			noteSequence.append( Note(startTime, 0, velocity) )
+
+	# to set the duration for the last note
+	if( len(noteSequence) > 0):
+		lastNote = noteSequence[-1]
+		
+		if nextbarVelocitySequence == None:
+			lastNote.duration = len(velocitySequence) - lastNote.startTime
+		else:
+			nextNoteStartTime = next((index for index, v in enumerate(nextbarVelocitySequence) if v), None)
+			lastNote.duration = len(velocitySequence) + nextNoteStartTime-lastNote.startTime
+
+
+	return noteSequence
+
+
+def note_sequence_to_velocity_sequence(noteSequence, timespanTicks = None):
+
+	velocitySequence = VelocitySequence()
+	
+	previousNoteStartTime = -1
+
+	for note in noteSequence:
+		
+		interOnsetInterval = note.startTime - previousNoteStartTime	
+		#ignore note if it is part of a chord...
+		if interOnsetInterval!=0:
+			velocitySequence += [0]*(interOnsetInterval-1)	
+			velocitySequence += [note.velocity]
+
+		previousNoteStartTime = note.startTime
+
+	if timespanTicks!=None:
+		velocitySequence += [0]*(timespanTicks - len(velocitySequence))
+	else:
+		velocitySequence += [0]*(noteSequence[-1].duration-1)
+
+	# normalising velocity sequence between 0-1
+	if max(velocitySequence)>0:
+		velocitySequence = VelocitySequence([float(v)/max(velocitySequence) for v in velocitySequence])
+
+	return velocitySequence
+
+
+class BarList(list):
+	def append(self,bar):
+		if(len(self)>0):
+			bar.set_previous_bar(self[-1])
+			self[-1].set_next_bar(bar)
+		super(BarList, self).append(bar)
+
+	def concat(self, barList):
+		while(len(barList)!=0):
+			localbar = barList[0]
+			self.append(localbar)
+			barList.remove(localbar)
+
+	def to_string(self, sequenceType="y"):
+		
+		output = ""
+
+		for bar in self:
+			prev = bar.get_previous_bar()
+
+			params = "t"+sequenceType
+
+			if prev!=None and prev.get_time_signature()==bar.get_time_signature():
+				params = "-"+params	
+			
+			output += " " + bar.to_string(params)
+
+		return output
+
+class Bar:
+	def __init__(self, rhythmSequence, timeSignature, ticksPerQuarter=None, qpmTempo=None, nextBar=None, prevBar=None):
+		if isinstance(rhythmSequence, NoteSequence):
+			self.noteSequence = rhythmSequence
+			self.velocitySequence = None 
+		elif isinstance(rhythmSequence, VelocitySequence):
+			self.velocitySequence = rhythmSequence
+			self.noteSequence = None 
+
+		if isinstance(timeSignature, basestring):
+			self.timeSignature = TimeSignature(timeSignature)
+		else:
+			self.timeSignature = timeSignature
+		
+		if ticksPerQuarter==None:
+			self.tpq = len(self.get_velocity_sequence())*self.timeSignature.get_denominator()/(4*self.timeSignature.get_numerator())
+		else:
+			self.tpq = ticksPerQuarter
+		
+		self.qpm = qpmTempo
+		
+
+
+		self.nextBar = nextBar
+		self.prevBar = prevBar
+
+	def get_note_sequence(self):
+		if self.noteSequence == None:
+			nextbarVelocitySequence = None
+			if self.nextBar != None:
+				nextbarVelocitySequence = self.nextBar.get_velocity_sequence()
+			self.noteSequence = velocity_sequence_to_note_sequence(self.velocitySequence, nextbarVelocitySequence)
+		return self.noteSequence
+
+	def get_velocity_sequence(self):
+		if self.velocitySequence == None:
+			self.velocitySequence = note_sequence_to_velocity_sequence(self.noteSequence, self.get_bar_ticks())
+		return self.velocitySequence
+
+	def get_binary_sequence(self):
+		return ceiling(self.get_velocity_sequence())
+
+	def get_next_bar(self):
+		return self.nextBar
+
+	def get_previous_bar(self):
+		return self.prevBar
+
+	def set_next_bar(self, bar):
+		self.nextBar = bar
+
+	def set_previous_bar(self, bar):
+		self.prevBar = bar		
+
+	def get_subdivision_sequence(self):
+		return self.timeSignature.get_subdivision_sequence()
+
+	def get_beat_level(self):
+		return self.timeSignature.get_beat_level()
+
+	def get_time_signature(self):
+		return self.timeSignature
+
+	# return the length of a bar in time units (ticks)
+	def get_bar_ticks(self):
+		return calculate_bar_ticks(self.timeSignature.get_numerator(),self.timeSignature.get_denominator(), self.tpq)
+
+	def is_empty(self):
+		if max(self.get_velocity_sequence())>0:
+			return False
+		else:
+			return True
+
+	def to_string(self, sequenceType="ty"):
+		
+		# prev = self.get_previous_bar()
+		# if prev!=None:
+		# 	if prev.get_time_signature()==self.get_time_signature():
+		# 		output=""
+		output = ""
+
+		if "-t" not in sequenceType:
+			output = "t{"+self.timeSignature.to_string()+"}"
+
+		if "v" in sequenceType:
+			output += "v{"+self.get_velocity_sequence().to_string()+"}"
+		else:
+			output += "y{"+self.get_note_sequence().to_string()+"}"
+
+		return output
+
+
+class TimeSignature():
+	def __init__(self, inputString):
+		if inputString in parameter_setter.read_time_signature():
+			self.tsString = inputString
+		else:
+			print "Error: undefined time-signature: ", inputString
+			raise NullTimeSignatureError
+
+	def get_subdivision_sequence(self):
+		return parameter_setter.timeSignatureBase[self.tsString][0]
+	
+	def get_beat_level(self):
+		return parameter_setter.timeSignatureBase[self.tsString][1]
+
+	def get_numerator(self):
+		return int(self.tsString.split('/')[0])
+			
+	def get_denominator(self):
+		return int(self.tsString.split('/')[1])
+
+	def to_string(self):
+		return self.tsString
+
+