view Syncopation models/parameter_setter.py @ 9:c2843ef4de2c

changing filenames to Python conventions

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

# Set the parameters: subdivision_seq, weight_seq, L_max, strong_beat_level

L_max = 5

# {'key': time-signature} :  
# {'value': [subdivision_seq, theoretical beat-level represented by index in the subdivision_seq list]}
timesigBase = {
	'2/2': [[1,2,2,2,2],1],
	'3/2': [[1,3,2,2,2],1],
	'4/2': [[1,2,2,2,2],1],
	'2/4': [[1,2,2,2,2],1],
	'3/4': [[1,3,2,2,2],1],
	'4/4': [[1,2,2,2,2],2],
	'5/4': [[1,5,2,2,2],1],
	'7/4': [[1,7,2,2,2],1],
	'3/8': [[1,3,2,2,2],1],
	'5/8': [[1,5,2,2,2],1],
	'6/8': [[1,2,3,2,2],1],
	'9/8': [[1,3,3,2,2],1],
	'12/8':[[1,2,2,3,2],2],	
}


def addTimesig(timesig, subdivision_seq, beat_level):
	if isTSValid(timesig,subdivision_seq,beat_level):
		if timesig in timesigBase:
			print 'This time-signature is existed already.'
		else:
			timesigBase[timesig] = [subdivision_seq, beat_level]
			writeTimesig()

def updateTimesig(timesig, subdivision_seq, beat_level):
	if isTSValid(timesig,subdivision_seq,beat_level):
		if timesig in timesigBase:
			print 'Original settings for', timesig, ':',timesigBase[timesig] 
			timesigBase[timesig] = [subdivision_seq, beat_level]
			print 'Changed into:',timesigBase[timesig]
			writeTimesig()

def isTSValid(timesig, subdivision_seq, beat_level):
	isValid = False
	if ('/' not in timesig) or (not timesig.split('/')[0].isdigit()) or (not timesig.split('/')[1].isdigit()):
		print 'Error: invalid time-signature. Please indicate in the form of fraction, e.g. 4/4, 6/8 or 3/4.'
	elif subdivision_seq != [s for s in subdivision_seq if isinstance(s,int)]:
		print 'Error: invalid subdivision sequence. Please indicate in the form of list of numbers, e.g [1,2,2,2,2].'
	elif beat_level >= len(subdivision_seq):
		print 'Error: beat-level exceeds the range of subdivision sequence list.'
	else:
		isValid = True
	return isValid

def writeTimesig():
	import cPickle as pickle
	timesigFile = open('TimeSignature.pkl', 'wb')
	pickle.dump(timesigBase, timesigFile)
	timesigFile.close()

def readTimesig():
	import cPickle as pickle
	timesigFile = open('TimeSignature.pkl','rb')
	data = pickle.load(timesigFile)
	return data
	timesigFile.close()

def viewTimesigBase():
	data = readTimesig()
	for timesig, settings in data.items():
		print timesig, settings

def set_L_max(number):
	L_max = number

def get_subdivision_seq(timesig):
	if timesig in readTimesig():
		return timesigBase[timesig][0]
	else:
		print 'Error: the subdivision sequence for this time-signature is not defined.'
		return None

def get_beat_level(timesig):
	if timesig in readTimesig():
		return timesigBase[timesig][1]
	else:
		print 'Error: the subdivision sequence for this time-signature is not defined.'
		return None