diff Syncopation models/synpy/parameter_setter.py @ 45:6e9154fc58df

moving the code files to the synpy package directory

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Syncopation models/synpy/parameter_setter.py	Thu Apr 23 23:52:04 2015 +0100
@@ -0,0 +1,113 @@
+'''
+Author: Chunyang Song
+Institution: Centre for Digital Music, Queen Mary University of London
+'''
+
+# Set the parameters: time-signature, subdivision-sequence, strong-beat-level; Lmax; weight-sequence
+# Important condition: Lmax needs to be no less than the length of subdivision-sequence and the length of weight-sequence
+
+
+# {'key': time-signature} :  
+# {'value': [subdivision-sequence, theoretical beat-level represented by index in the subdivision-sequence list]}
+timeSignatureBase = {
+	'2/2': [[1,2,2,2,2,2],1],
+	'3/2': [[1,3,2,2,2,2],1],
+	'4/2': [[1,2,2,2,2,2],1],
+	'2/4': [[1,2,2,2,2,2],1],
+	'3/4': [[1,3,2,2,2,2],1],
+	'4/4': [[1,2,2,2,2,2],2],
+	'5/4': [[1,5,2,2,2,2],1],
+	'7/4': [[1,7,2,2,2,2],1],
+	'3/8': [[1,3,2,2,2,2],1],
+	'5/8': [[1,5,2,2,2,2],1],
+	'6/8': [[1,2,3,2,2,2],1],
+	'9/8': [[1,3,3,2,2,2],1],
+	'12/8':[[1,2,2,3,2,2],2],	
+}
+
+
+def add_time_signature(timeSignature, subdivisionSequence, beatLevel):
+	if is_time_signature_valid(timeSignature,subdivisionSequence,beatLevel):
+		if timeSignature in timesigBase:
+			print 'This time-signature is existed already.'
+		else:
+			timeSignatureBase[timeSignature] = [subdivisionSequence, beatLevel]
+			write_time_signature()
+
+def update_time_signature(timeSignature, subdivisionSequence, beatLevel):
+	if is_time_signature_valid(timeSignature,subdivisionSequence,beatLevel):
+		if timeSignature in timeSignatureBase:
+			print 'Original settings for ', timeSignature, ':',timeSignatureBase[timeSignature] 
+			timeSignatureBase[timeSignature] = [subdivisionSequence, beatLevel]
+			print 'Changed into:',timeSignatureBase[timeSignature]
+			write_time_signature()
+
+def is_time_signature_valid(timeSignature, subdivisionSequence, beatLevel):
+	isValid = False
+	if ('/' not in timeSignature) or (not timeSignature.split('/')[0].isdigit()) or (not timeSignature.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 subdivisionSequence != [s for s in subdivisionSequence 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 beatLevel >= len(subdivisionSequence):
+		print 'Error: beat-level exceeds the range of subdivision sequence list.'
+	else:
+		isValid = True
+	return isValid
+
+def write_time_signature():
+	import cPickle as pickle
+	timeSigFile = open('TimeSignature.pkl', 'wb')
+	pickle.dump(timeSignatureBase, timeSigFile)
+	timeSigFile.close()
+
+def read_time_signature():
+	import cPickle as pickle
+	timeSigFile = open('TimeSignature.pkl','rb')
+	data = pickle.load(timeSigFile)
+	return data
+	timeSigFile.close()
+
+def print_time_signature_base():
+	data = read_time_signature()
+	for timeSignature, settings in data.items():
+		print timeSignature, settings
+
+
+def are_parameters_valid(Lmax, weightSequence, subdivisionSequence):
+
+	# is_Lmax_valid() checks:
+	# 1. if Lmax is a non-negative integer
+	# 2. if Lmax is higher than the length of weightSequence and subdivisionSequence 
+	def is_Lmax_valid():
+		isValid = False
+		if isinstance(Lmax,int) and Lmax > 0:
+			if Lmax <= len(subdivisionSequence)-1:
+				if Lmax <= len(weightSequence)-1:
+					isValid = True
+				else:
+					print 'Error: Lmax exceeds the length of weight-sequence. Either reduce Lmax, or provide a new weight-sequence whose length is greater or equal to Lmax.'
+			else:
+				print 'Error: Lmax exceeds the length of subdivision-sequence. Either reduce Lmax, or extend subdivision-sequence through updating time-signature (refer to update_time_signature function).'
+		else:	
+			print 'Error: Lmax needs to be a positive integer.'
+		return isValid
+
+	# is_weight_sequence_valid() checks:
+	# 1. weightSequence is a list of numbers
+	# 2. the length of weightSequence is no less than Lmax
+	def is_weight_sequence_valid():
+		isValid = False
+		if isinstance(weightSequence,list) and weightSequence == [i for i in weightSequence if isinstance(i,int)]:
+			if len(weightSequence) >= Lmax:
+				isValid = True
+			else:
+				print 'Error: the length of weight-sequence needs to be greater or equal to Lmax.'
+		else:
+			print 'Error: the weight-sequence needs to be a list of integers.'
+		return isValid
+
+
+	if is_weight_sequence_valid() and is_Lmax_valid():
+		return True
+	else:
+		return False