scripts/musedata2ly.py

   1 #!@PYTHON@
   2
   3 # musedata = musedata.stanford.edu
   4 # musedata = COBOL for musicians.
   5
   6 import re
   7 import sys
   8 import string
   9
  10 f = open (sys.argv[1])
  11 lines =f.readlines()
  12
  13 def chomp (x):
  14         return re.sub ('[\r\n \t]+$','', x)
  15
  16 lines = map (chomp, lines)
  17
  18 default_header_dict = {
  19         'tagline' :'automatically converted from Musedata',
  20         'copyright' : 'all rights reserved -- free for noncommercial use'
  21         }
  22
  23 # Jezus, wat een ranzig formaat. (2am)
  24 def parse_header (lines):
  25         d = default_header_dict
  26         enter = string.split (lines[3], ' ')
  27         d['enteredby']  = string.join (enter[1:])
  28         d['enteredon'] = enter[0]
  29         d['opus'] = lines[4]
  30         d['source'] = lines[5]
  31         d['title'] = lines[6]
  32         d['subtitle'] = lines[7]
  33         d['instrument']= lines[8]
  34         d['musedatamisc'] =lines[9]
  35         d['musedatagroups'] =lines[10]
  36         d['musedatagroupnumber']=lines[11]
  37
  38         return d
  39
  40 clef_dict = {
  41 04: 'treble',
  42 13 : 'alto',
  43 22: 'bass',
  44
  45 }
  46
  47 def get_clef(s):
  48         return '\\clef "%s";\n' % clef_dict [string.atoi (s)]
  49
  50 def get_mudela_notename (p, ac):
  51         if p > 5:
  52                 p = p - 7
  53         s = chr (p + ord ('c'))
  54         infix = 'i'
  55         if ac < 0:
  56                 infix = 'e'
  57                 ac = -ac
  58
  59         while ac:
  60                 s = s + infix + 's'
  61                 ac = ac - 1
  62         return s
  63
  64 def get_key (s):
  65         i = string.atoi (s)
  66         return ''
  67
  68 def get_timesig (s):
  69         return '\\time %s;\n' % s
  70
  71
  72 divisions = 4
  73 def get_divisions_per_quarter (s):
  74         divisions = string.atoi (s)
  75         return ''
  76
  77 def get_directive (s):
  78         return '%% %s\n' % s
  79
  80 def get_transposing (s):
  81         return ''
  82
  83 def get_num_instruments (s):
  84         return ''
  85
  86 attr_dict = {
  87         'C' : get_clef,
  88         'K' : get_key ,
  89         'T' : get_timesig,
  90         'Q' : get_divisions_per_quarter,
  91         'D' : get_directive,
  92         'X' : get_transposing,
  93         'I': get_num_instruments,
  94         }
  95
  96 def parse_musical_attributes (l):
  97         s = ''
  98         l = l[1:]
  99         atts = re.split('[ \t]+', l)
 100         for a in atts:
 101                 if not a:
 102                         continue
 103                 m = re.search ('(.):(.*)', a)
 104                 if m == None:
 105                         print 'Huh, unknown attr `%s\'' % a
 106                         continue
 107
 108                 s = s + attr_dict[m.group(1)](m.group (2))
 109         return s
 110
 111
 112 def get_mudela_pitch (n, a, o):
 113         c = '\''
 114         if o < 1:
 115                 c = ','
 116                 o = 1 - o
 117
 118         return get_mudela_notename (n,a) +  '%s' % c * o
 119
 120 def dump_header (h, out):
 121         out.write ('\\header {\n')
 122         for tup in h.items ():
 123                 out.write ('\t%s = \"%s\";\n' % tup)
 124         out.write ('}\n')
 125
 126 header_dict = parse_header (lines[0:12])
 127 dump_header (header_dict, sys.stdout)
 128
 129
 130 lines  = lines [12:]
 131
 132
 133 def parse_line_comment (l):
 134         return re.sub ('@' , '%' , l)
 135
 136 def parse_note_line (l):
 137         pitch = ((ord (l[0]) -ord('A')) + 5) % 7
 138         acc = 0
 139         l= l[1:]
 140         while l[0] == 'f':
 141                 l= l[1:]
 142                 acc = acc - 1
 143         while l[0] == '#':
 144                 l= l[1:]
 145                 acc = acc + 1
 146         while l[0] in ' \t':
 147                 l= l[1:]
 148
 149         oct = 0
 150         if l[0] in '0123456789':
 151                 oct = string.atoi (l[0]) - 4
 152                 l= l[1:]
 153
 154         while l[0] in ' \t':
 155                 l= l[1:]
 156
 157
 158         print get_mudela_pitch (pitch,acc,oct), parse_duration(l[:2])
 159         l = l[2:]
 160
 161
 162
 163
 164 def parse_duration (l):
 165         s = ''
 166         while l[0] in '0123456789':
 167                 s = s + l[0]
 168                 l= l[1:]
 169         print l
 170         num = string.atoi (s)
 171         den = 4 * divisions
 172
 173         current_dots = 0
 174         try_dots = [3, 2, 1]
 175         for d in try_dots:
 176                 f = 1 << d
 177                 multiplier = (2*f-1)
 178                 if num % multiplier == 0 and den % f == 0:
 179                         num = num / multiplier
 180                         den = den / f
 181                         current_dots = current_dots + d
 182
 183         if num <> 1:
 184                 sys.stderr.write ('huh. Durations left')
 185         return '%s%s' % (den, '.' * current_dots)
 186
 187 comment_switch = 0
 188 for l in lines:
 189         if l[0] == '&':
 190                 comment_switch = not comment_switch
 191                 if comment_switch:
 192                         l= l[1:]
 193                         print '%{'
 194                 else:
 195                         print '%}'
 196
 197         if comment_switch:
 198                 print l
 199                 continue
 200
 201         if 0:
 202                 pass
 203         elif l[0] == '$':
 204                 print parse_musical_attributes (l)
 205         elif l[0] == '@':
 206                 parse_line_comment (l)
 207
 208         elif l[0] in 'ABCDEFG':
 209                 parse_note_line (l)