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#!/usr/bin/python
# -*- coding: utf-8 -*-
# MusE external midi processing script
# By: Robert Jonsson 2009
# Quantize
#=============================================================================
# MusE
# Linux Music Editor
# $Id:$
#
# Copyright (C) 2002-2011 by Werner Schweer and others
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the
# Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
#=============================================================================
import sys,time
from PyQt4 import QtGui, QtCore
import random
class Quantize(QtGui.QWidget):
def __init__(self, parent=None):
QtGui.QWidget.__init__(self, parent)
self.setWindowTitle('Swing quantize V1')
self.beatEdit = QtGui.QComboBox()
self.beatEdit.addItem('1/1',1)
self.beatEdit.addItem('1/2',2)
self.beatEdit.addItem('1/4',4)
self.beatEdit.addItem('1/8',8)
self.beatEdit.addItem('1/16',16)
self.beatEdit.addItem('1/32',32)
self.beatEdit.setCurrentIndex(2)
self.spreadEdit = QtGui.QLineEdit()
self.spreadEdit.setText('10')
button = QtGui.QPushButton("Execute")
self.connect(button, QtCore.SIGNAL('clicked()'), self.execute)
grid = QtGui.QGridLayout()
grid.setSpacing(3)
grid.addWidget(QtGui.QLabel('Beat granularity:'), 1, 0)
grid.addWidget(self.beatEdit, 1, 1)
grid.addWidget(QtGui.QLabel('Spread/Swing(ticks)'), 2, 0)
grid.addWidget(self.spreadEdit, 2, 1)
grid.addWidget(button, 3, 1)
self.setLayout(grid)
self.resize(200, 100)
button.setFocus()
def execute(self):
testFile = file(sys.argv[1],"r")
inputEvents = testFile.readlines()
testFile.close()
beatDiv = self.beatEdit.itemData(self.beatEdit.currentIndex()).toInt()[0]
minSize=0 # fill in when we get the beat size value
outputEvents=[]
quantLen=0
#get beat length to calculate minimum length of event
for line in inputEvents:
if line.startswith('BEATLEN'):
tag,tick = line.split(' ')
beatLen=int(tick)
quantLen=int(tick)/beatDiv*4
print "quantLen=%d beatDiv=%d"%(quantLen, beatDiv)
print line.strip()
#loop through events and quantize to the given beat
eventList=[]
for line in inputEvents:
if line.startswith('NOTE'):
tag,tick,pitch,length,velocity = line.split(' ')
# over quantize
lowerBound=(int(tick)/quantLen)*quantLen
upperBound=lowerBound+quantLen
lowDiff=int(tick)-lowerBound
highDiff=upperBound - int(tick)
if( lowDiff < highDiff):
newTick=lowerBound
else:
newTick=upperBound
# apply swing factor to every other 8 beat
print "float =%f int = %d"%((float(newTick+beatLen)) / beatLen/2,((newTick+beatLen))/beatLen/2)
if ((float(newTick+beatLen)) / beatLen/2 - ((newTick+beatLen))/beatLen/2) < 0.1:
print "adding swing to:",newTick
newTick=int(random.gauss(newTick,self.spreadEdit.text().toInt()[0]))
if (newTick < 0):
newTick=0
newLine="NOTE "+ str(newTick)+" " + pitch + " "+ length + " " + velocity
print "newLine:",newLine.strip()
outputEvents.append(newLine)
else:
outputEvents.append(line)
testFile = file(sys.argv[1],"w")
testFile.writelines(outputEvents)
testFile.close()
quit()
app = QtGui.QApplication(sys.argv)
qb = Quantize()
qb.show()
sys.exit(app.exec_())
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