view Syncopation models/RhythmParser.py @ 2:031e2ccb1fb6

Added rhythm parser and parameter setter

'''
Author: Chunyang Song
Institution: Centre for Digital Music, Queen Mary University of London
'''

# Parse the rhythm file and return a list of Bar objects

import ParameterSetter

class Bar:

	def __init__(self, rhythm_seq, subdivision_seq, beat_level):
		self.rhythm_seq = rhythm_seq
		self.subdivision_seq = subdivision_seq
		self.beat_level = beat_level

	def makeBar(self):
		return [self.rhythm_seq, self.subdivision_seq, self.beat_level]


current_timesig = ''
Piece = []

def readRhythm(fileName):
	try:
		f = file(fileName)

		bar = f.readline()

		# While the current line has contents
		while len(bar) > 0:
			rhythm_seq = []

			info = bar.split(';')
			
			if isInfoValid(info):
				for i in info:
					if i[0] == 't':
						current_timesig = i[i.find('{')+1:i.find('}')]
					elif i[0] == 'q':
						rhythmString = i[i.find('{')+1:i.find('}')]
						rhythm_seq = map(int,rhythmString.split(','))
					else:
						print 'Error: %s is not recognisable. Please check this rhythm file: %s.' %(i[0], fileName)

				#Piece.append(Bar(rhythm_seq, subdivision_seq, beat_level).makeBar())
			else:
				break

			bar = f.readline()

		return Piece
	except:
		print 'Unexpected error.'#, sys.exc_info()[0]
		raise

def isInfoValid(info):
	# If two parts of information is not seperated by ;
	# if 't' in info and 'q' in info:
	# 	print 'Error: time-signature and rhythm sequence needs ";" to seperate. Please check this rhythm file: %s.' %fileName
	# 	Piece = None
	# 	break
	# elif '{' not in info and '}' not in info:
	# 	print 'Error: information needs to be enclosed by "{ }". Please check this rhythm file: %s.' %fileName
	# 	Piece = None
	# 	break				
	# else:
	return True			

# To check whether the given time-signature is existed; if not then requires user to add in the new time-signature
#def checkTimesig(input):


# TESTING
print readRhythm("rhythmbase/clave.txt")