view Syncopation models/music_objects.py @ 21:b6daddeefda9

working on KTH

from basic_functions import ceiling, string_to_sequence, calculate_time_span_ticks

import parameter_setter 
import rhythm_parser 

class Note():
	def __init__(self, argstring):
		intlist = string_to_sequence(argstring)
		self.startTime = intlist[0]
		self.duration = intlist[1]
		self.velocity = intlist[2]
	
	# toString()

# 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.discardSpaces(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))

	# toString()


#print NoteSequence("(1,2,3),(4,5,6),(7,8,9)")
class VelocitySequence(list):
	def __init__(self, noteSequenceString=None):
		if noteSequenceString!=None:
			self.string_to_note_sequence(noteSequenceString)

	def string_to_note_sequence(self,inputString):
		self.extend(string_to_sequence(inputString))


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)





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 

		self.tpq = ticksPerQuarter
		self.qpm = qpmTempo
		self.timeSignature = TimeSignature(timeSignature)
		self.nextBar = nextBar
		self.prevBar = prevBar

	def get_note_sequence(self):
		if self.noteSequence==None:
			self.noteSequence = velocity_sequence_to_notes(self.velocitySequence)
		return self.noteSequence

	def get_velocity_sequence(self):
		if self.velocitySequence==None:
			self.velocitySequence = note_sequence_to_velocities(self.noteSequence)
		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_time_span(self):
		return calculate_time_span_ticks(self.timeSignature.get_numerator(),self.timeSignature.get_denominator(), self.ticksPerQuarter)

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])