Initialized repo
This commit is contained in:
Jezra
commit
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bwwtolily will attempt to convert a .bww or .bmw file to a lilypond
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(http://lilypond.org) parsable file. Not all of the embellishments
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get converted properly, this is espessially true with piobaireachd,
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and the program will list the embellishments that were not converted.
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If you recognize an embellishment that isn't being parsed, please
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send an email regarding the embellishment to jezra@jezra.net and I
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will try to add the embellishment to the application.
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usage:
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>bwwtolily -i /path/to/a/bww/file
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optionally, using the "-l" flag will try to run lilypond on the
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created .ly file
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example:
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>bwwtolily -i /path/to/bww/file -l
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#!/usr/bin/env python
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'''
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bwwtolily: will convert a bww file to a lilypond file
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copyright: 2008 Jezra Lickter
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GPL v3
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'''
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from optparse import OptionParser
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import sys,os,re,subprocess
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version = "0.4.0"
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#define the class that will convert a bww file to a lilypond file
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class bwwtolily :
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def __init__(self,addmidi=False):
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self.tune_elements = []
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self.most_recent_note = 0
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self.in_note_group=False
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self.slur_tie_pending = False
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self.last_group_close=0
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'''compile a few regex queries'''
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#make a regex to determine if something is a lilypond note
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self.regex_lilynote= re.compile("[abcdefgAG][0-9]*")
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#try to determine the time signature
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self.sig_regex = re.compile("([0-9])_([0-9])")
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#a regex to find notes
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self.regex_note_info=re.compile("(?P<note>[A-Z]+)(?P<dir>[a-z]*)_(?P<time>[0-9]{1,2})")
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#a regex to find grace notes
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self.regex_grace_note = re.compile("([h|l]*[abcdefgt])g")
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#a regex to parse doublings
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self.regex_doubling = re.compile("^db([h|l]*[g|a|b|c|d|e|f]{1})")
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#a regex to parse half_doublings
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self.regex_half_doubling = re.compile("^hdb([h|l]*[g|a|b|c|d|e|f]{1})")
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#a regex for finding strikes
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self.regex_strike = re.compile("str([h|l]*[abcdefg])")
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#a regex to find dots
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self.regex_dot = re.compile("'[h|l]*[abcdefg]")
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#a regex to find sub repeats
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self.regex_sub_repeat = re.compile("'([0-9]+)")
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#a regex to find note slurs, not slur embellishments
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self.regex_slur = re.compile("\^(?P<note_count>[0-9])(?P<end_note>[a-z]*)")
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#we need a list to ignore
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self.ignore_elements = ("sharpf","sharpc","space","&")
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#create a dictionary of common bww elements and their lily counterparts
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self.transpose_dict = {
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"!":"\\bar \"|\"\n",
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"!I":"\\bar \".|\" \\break \n",
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#"''!I":"\\set Score.repeatCommands = #'( end-repeat ) \\break \n",
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"''!I":"\\bar \":|\" \\break\n",
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#"''!I":"} \\break \n",
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"I!''":"\\bar \"|:\"",
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"I!":"\\bar \"|.\"",
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#"I!''":"\\set Score.repeatCommands = #'( start-repeat )\n",
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#"I!''":"\n\\repeat volta 2 {\n",
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"_'":"\\set Score.repeatCommands = #'((volta #f)) \\bar \"|\"\n",
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"!t":"\\bar \"|\" \\break\n\n",
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"thrd":"\\thrwd",
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"gbr":"\\gbirl",
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"brl":"\\wbirl",
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"abr":"\\birl",
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"lgstd":"\\dbld",
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"gste":"\\slure",
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"grp":"\\grip",
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"tar":"\\taor",
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"gstd":"\\slurd",
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"tdbf":"\\tdblf"
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}
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#are we adding midi?
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if addmidi:
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self.lily_midi="\midi{}"
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else:
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self.lily_midi=''
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def set_file(self,file_path):
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#determine the absolute path to the file
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abs_file = os.path.join(os.getcwd(),file_path)
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file_name = os.path.basename(abs_file)
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(self.name,ext) = file_name.split(".")
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#does the file exist?
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if os.path.isfile(abs_file):
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self.original_file = abs_file
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self.file_dir = os.path.dirname(abs_file)
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else:
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raise Exception(bww_file_path+" is not a file")
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def quit(self,string=""):
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if string!="":
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print string
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sys.exit()
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def parse(self):
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'''reate a string that represents the converted
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contents of the file'''
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#open the file read only
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file_handle = open(self.original_file,"r")
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#read the contents of the file
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file_text = file_handle.read()
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#get the title,type,author of the file, these are in quotes
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quote_regex = re.compile("\"(.*)\"")
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tune_info = quote_regex.findall(file_text)
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self.tune_title = tune_info[0]
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self.tune_type = tune_info[1]
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self.tune_author = tune_info[2]
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#try to determine the time signature
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result = self.sig_regex.search(file_text)
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if result:
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self.tune_time_sig = result.group(1)+"/"+result.group(2)
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else:
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self.tune_time_sig = "4/4"
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#get the tunes note info
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'''greedy, multiline, from first ampersand to !'''
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notes_regex = re.compile("&.*!I",re.S)
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result = notes_regex.search(file_text)
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try:
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tune_notes = result.group()
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except:
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#no notes were found, what kind of file is this
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self.quit("No notes were found.\nIs this a valid input file?")
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#replace all whitespace characters with spaces
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tune_notes = tune_notes.replace("\r"," ")
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tune_notes = tune_notes.replace("\n"," ")
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tune_notes = tune_notes.replace("\t"," ")
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'''determine if there is a partial'''
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'''
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#get the first part of the notes from & to !
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partial_regex = re.compile("&.*?[ |\r\n]!",re.S)
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#partial_regex = re.compile("&.*?!",re.S)
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result = partial_regex.findall(tune_notes)
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search_string = result[0]
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#find the time of the notes in the search string
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partial_regex = re.compile("[A-Z]+[a-z]*_([0-9]{1,2})")
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result = partial_regex.findall(search_string)
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self.tune_partial_string = ""
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if result:
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partial_time = 0
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#TODO: determine the proper way to determine the partial
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for number in result:
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partial_time += (1.0/int(number))
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print "time: %s" % ( partial_time )
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#how many quarter notes is this?
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quarters = partial_time/.25
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print "quarters: %d" % quarters
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#self.tune_partial_string = "\\partial %d" % quarters
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#self.tune_partial_string = "\\partial "+str(part)
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'''
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#split the string into it's constituents elements
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elements = tune_notes.split()
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for element in elements:
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self.transpose(element)
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#print self.tune_notes
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def lilynote(self,bwwname):
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#convert a bww notename to a lilypond notename
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#make the notename lowercase
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notename = bwwname.lower()
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if notename =="lg":
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lilynote = "G"
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elif notename == "la":
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lilynote ="a"
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elif notename == "hg":
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lilynote = "g"
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elif notename == "ha" or notename =="t":
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lilynote = "A"
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else:
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lilynote = notename
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return lilynote
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def transpose(self,element):
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'''receive a bww element and return a lilypond equivelent'''
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#is the element a note?
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note_result = self.regex_note_info.search(element)
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if note_result:
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note = self.lilynote( note_result.group("note") )+note_result.group("time")
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#is a tie slur pending?
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if self.slur_tie_pending:
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self.slur_tie_pending=False
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note+="~"
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self.tune_elements.append(note)
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self.most_recent_note = len(self.tune_elements)-1
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if note_result.group("dir") == "r" and not self.in_note_group:
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self.in_note_group=True
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self.tune_elements.append("[")
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elif note_result.group("dir") == "l":
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if self.in_note_group:
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self.in_note_group=False
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self.tune_elements.append("]")
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self.last_group_close = len(self.tune_elements)-1
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else:
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#delete the last group close
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del(self.tune_elements[self.last_group_close])
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#decrement the most recent note
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self.most_recent_note-=1
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self.tune_elements.append("]")
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return
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#is the element a grace note?
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grace_result=self.regex_grace_note.search(element)
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if grace_result:
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grace = "\\gr"+self.lilynote( grace_result.group(1) )
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self.tune_elements.append(grace)
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return
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#is the element a doubling?
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doubling_result=self.regex_doubling.search(element)
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if doubling_result:
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doubling = "\\dbl"+self.lilynote( doubling_result.group(1) )
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self.tune_elements.append(doubling)
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return
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#is the element a half doubling?
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hdoubling_result=self.regex_half_doubling.search(element)
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if hdoubling_result:
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half_doubling = "\\hdbl"+self.lilynote( hdoubling_result.group(1) )
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self.tune_elements.append(half_doubling)
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return
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#is the element a strike?
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strike_result=self.regex_strike.search(element)
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if strike_result:
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strike = "\\slur"+self.lilynote( strike_result.group(1) )
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#if the strike is on low g \\slurG
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if strike =="\\slurG":
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#let the strike be a low g grace note
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strike = "\\grG"
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#if the strike is on high G
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elif strike =="\\slurg":
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#let the strike be a grace note on the high g
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strike = "\\grg"
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#if hte strike is on low a
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elif strike == "\\slura":
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#let the strike be a grace not on low a
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strike = "\\gra"
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self.tune_elements.append(strike)
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return
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#is the element a dot?
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dot_result=self.regex_dot.search(element)
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if dot_result:
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#add a dot to the last note
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note = self.tune_elements[self.most_recent_note]
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if note[-1]=="~":
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self.tune_elements[self.most_recent_note].replace("~",".~")
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else:
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self.tune_elements[self.most_recent_note]+="."
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return
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#is the element a slur?
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slur_result = self.regex_slur.search(element)
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if slur_result:
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#get the matching elements
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note_count = slur_result.group("note_count")
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end_note = slur_result.group("end_note")
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#get the length of the slur as an integer
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slur_len = int(note_count)
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'''find the position of the note that is slur_len from the end'''
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#get the tune_elements lenght
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elem_index = len(self.tune_elements)-1
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note_count = 0
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while note_count<2:
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element = self.tune_elements[elem_index]
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#is this element a note?
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is_note = self.regex_lilynote.search(element)
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if is_note:
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#increment the note count
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note_count+=1
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#decrease the element index
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elem_index-=1
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#add the slur start just after the start note
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self.tune_elements.insert(elem_index+1,"(")
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#add the slur end
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self.tune_elements.append(")")
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return
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#is this a bww tie slur?
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if element == "^ts":
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self.slur_tie_pending = True
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return
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#is the element the start of a sub_repeat?
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sub_repeat_result = self.regex_sub_repeat.search(element)
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if sub_repeat_result:
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sub_repeat = "\\set Score.repeatCommands = #'((volta \"%s\")) " % ( sub_repeat_result.group(1) )
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self.tune_elements.append(sub_repeat)
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return
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else:
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#is the element in the ignore list?
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if element in self.ignore_elements:
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return
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'''
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if the element is an start double,
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check if the previous element was a end double
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'''
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if len(self.tune_elements):
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last_element = self.tune_elements[-1]
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if element=="I!''" and last_element.find(":|"):
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#replace the last element with a double double
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self.tune_elements[-1] = "\\bar \":|:\" \\break\n\n"
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return
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#is this a time sig?
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result = self.sig_regex.search(element)
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if result:
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return
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try:
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dict_result = self.transpose_dict[element]
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if dict_result:
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self.tune_elements.append(dict_result)
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return
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except:
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print "unparsed: "+element
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return
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#handle writing the output
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def create_output_file(self):
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#determine the output file
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output_file = os.path.join(self.file_dir,self.name+".ly")
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#open the file for writing
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file_handle = open(output_file,"w")
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#write the data to the file
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text = self.get_lilypond_text()
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file_handle.write(text)
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#close the handle
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file_handle.close()
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#return the string of the path to the file
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return output_file
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def get_lilypond_text(self):
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tune_text = " ".join(self.tune_elements)
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lptext ='''\\include "bagpipe.ly"
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melody = {
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\\set Staff.midiInstrument = #"bagpipe"
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\\hideKeySignature
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\\cadenzaOn
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\\once \\override Score.BreakAlignment #'break-align-orders =
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#(make-vector 3 '(instrument-name
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left-edge
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ambitus
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span-bar
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breathing-sign
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clef
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key-signature
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time-signature
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staff-bar
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custos
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span-bar))
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\\time %s
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%s
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}
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\\score {
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\\melody
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\\layout {
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indent = 0.0\\cm
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\\context { \\Score \\remove "Bar_number_engraver" }
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}
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\\header {
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title = "%s"
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meter = "%s"
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arranger = "%s"
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}
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%s
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}
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''' % (self.tune_time_sig,
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tune_text,
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self.tune_title,
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self.tune_type,
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self.tune_author,
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self.lily_midi
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)
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return lptext
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#use the bww2lily class
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if __name__ == "__main__" :
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parser = OptionParser()
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parser.add_option("-i", "--in", dest="input",
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help="the FILE to convert", metavar="FILE")
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parser.add_option("-l", "--lilypond",
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action="store_true", dest="runlilypond", default=False,
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help="run lilypond after converting the file")
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parser.add_option("-m", "--midi",
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action="store_true", dest="addmidi", default=False,
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help="add midi output to the lilypond file")
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parser.add_option("-v","--version",dest='version', default=False,
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action="store_true",help="print version information and quit")
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#parse the args
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(options, args) = parser.parse_args()
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if options.version:
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print "bwwtolily: ",version
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sys.exit()
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if options.input!=None:
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b2l = bwwtolily(options.addmidi)
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b2l.set_file(options.input)
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b2l.parse()
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new_file = b2l.create_output_file()
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#are we running lilypond?
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if options.runlilypond:
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#try to run lilypond as a subprocess
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subprocess.check_call("lilypond \""+new_file+"\"",shell=True)
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else:
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parser.print_help()
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sys.exit()
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