scripts/abc2ly.py

   1 #!@PYTHON@
   2
   3 # once upon a rainy monday afternoon.
   4 #
   5 #   ...
   6 #
   7 # (not finished.)
   8 # ABC standard v1.6:  http://www.gre.ac.uk/~c.walshaw/abc2mtex/abc.txt
   9 #
  10 # Enhancements  (Roy R. Rankin)
  11 #
  12 # Header section moved to top of lilypond file
  13 # handle treble, treble-8, alto, and bass clef
  14 # Handle voices (V: headers) with clef and part names, multiple voices
  15 # Handle w: lyrics with multiple verses
  16 # Handle key mode names for minor, major, phrygian, ionian, locrian, aeolian,
  17 #     mixolydian, lydian, dorian
  18 # Handle part names from V: header
  19 # Tuplets handling fixed up
  20 # Lines starting with |: not discarded as header lines
  21 # Multiple T: and C: header entries handled
  22 # Accidental maintained until next bar check
  23 # Silent rests supported
  24 # articulations fermata, upbow, downbow, ltoe, accent, tenuto supported
  25 # Chord strings([-^]"string") can contain a '#'
  26 # Header fields enclosed by [] in notes string processed
  27 # W: words output after tune as abc2ps does it (they failed before)
  28
  29 # Enhancements (Laura Conrad)
  30 #
  31 # Barring now preserved between ABC and lilypond
  32 # the default placement for text in abc is above the staff.
  33 # %%LY now supported.
  34 # \breve and \longa supported.
  35 # M:none doesn't crash lily.
  36
  37 # Limitations
  38 #
  39 # Multiple tunes in single file not supported
  40 # Blank T: header lines should write score and open a new score
  41 # Not all header fields supported
  42 # ABC line breaks are ignored
  43 # Block comments generate error and are ignored
  44 # Postscript commands are ignored
  45 # lyrics not resynchronized by line breaks (lyrics must fully match notes)
  46 # %%LY slyrics can't be directly before a w: line.
  47 # ???
  48
  49
  50
  51 #TODO:
  52 #
  53 # Convert to new chord styles.
  54 #
  55 # UNDEF -> None
  56 #
  57
  58
  59 program_name = 'abc2ly'
  60 version = '@TOPLEVEL_VERSION@'
  61 if version == '@' + 'TOPLEVEL_VERSION' + '@':
  62         version = '(unknown version)'           # uGUHGUHGHGUGH
  63
  64 import __main__
  65 import getopt
  66 import sys
  67 import re
  68 import string
  69 import os
  70
  71
  72 UNDEF = 255
  73 state = UNDEF
  74 strict = 0
  75 voice_idx_dict = {}
  76 header = {}
  77 header['footnotes'] = ''
  78 lyrics = []
  79 slyrics = []
  80 voices = []
  81 state_list = []
  82 repeat_state = [0] * 8
  83 current_voice_idx = -1
  84 current_lyric_idx = -1
  85 lyric_idx = -1
  86 part_names = 0
  87 default_len = 8
  88 length_specified = 0
  89 nobarlines = 0
  90 global_key = [0] * 7                    # UGH
  91 names = ["One", "Two", "Three"]
  92 DIGITS='0123456789'
  93 alphabet="ABCDEFGHIJKLMNOPQRSTUVWXYZ"
  94 HSPACE=' \t'
  95 midi_specs = ''
  96
  97
  98 def error (msg):
  99         sys.stderr.write (msg)
 100         if strict:
 101                 sys.exit (1)
 102
 103
 104 def check_clef(s):
 105       if not s:
 106               return ''
 107       if re.match('-8va', s) or re.match('treble8', s):
 108               # treble8 is used by abctab2ps; -8va is used by barfly,
 109               # and by my patch to abc2ps. If there's ever a standard
 110               # about this we'll support that.
 111               s = s[4:]
 112               state.base_octave = -1
 113               voices_append("\\clef \"G_8\"\n")
 114       elif re.match('^treble', s):
 115               s = s[6:]
 116               if re.match ('^-8', s):
 117                       s = s[2:]
 118                       state.base_octave = -2
 119                       voices_append("\\clef \"G_8\"\n")
 120               else:
 121                       state.base_octave = 0
 122                       voices_append("\\clef treble\n")
 123       elif re.match('^alto', s):
 124               s = s[4:]
 125               state.base_octave = -1
 126               voices_append ("\\clef alto\n" )
 127       elif re.match('^bass',s ):
 128               s = s[4:]
 129               state.base_octave = -2
 130               voices_append ("\\clef bass\n" )
 131       return s
 132
 133 def select_voice (name, rol):
 134         if not voice_idx_dict.has_key (name):
 135               state_list.append(Parser_state())
 136               voices.append ('')
 137               slyrics.append ([])
 138               voice_idx_dict[name] = len (voices) -1
 139         __main__.current_voice_idx =  voice_idx_dict[name]
 140         __main__.state = state_list[current_voice_idx]
 141         while rol != '':
 142               m = re.match ('^([^ \t=]*)=(.*)$', rol) # find keywork
 143               if m:
 144                       keyword = m.group(1)
 145                       rol = m.group (2)
 146                       a = re.match ('^("[^"]*"|[^ \t]*) *(.*)$', rol)
 147                       if a:
 148                               value = a.group (1)
 149                               rol = a.group ( 2)
 150                               if keyword == 'clef':
 151                                       check_clef(value)
 152                               elif keyword == "name":
 153                                       value = re.sub ('\\\\','\\\\\\\\', value)
 154                                       voices_append ("\\property Staff.instrument = %s\n" % value )
 155                                       __main__.part_names = 1
 156                               elif keyword == "sname" or keyword == "snm":
 157                                       voices_append ("\\property Staff.instr = %s\n" % value )
 158
 159               else:
 160                       break
 161
 162         return
 163
 164
 165 def dump_header (outf,hdr):
 166         outf.write ('\\header {\n')
 167         ks = hdr.keys ()
 168         ks.sort ()
 169         for k in ks:
 170                 hdr[k] = re.sub('"', '\\"', hdr[k])
 171                 outf.write ('\t%s = "%s"\n'% (k,hdr[k]))
 172         outf.write ('}')
 173
 174 def dump_lyrics (outf):
 175         if (len(lyrics)):
 176                 outf.write("\n\\score\n{\n    \\context Lyrics\n    <<\n")
 177                 for i in range (len (lyrics)):
 178                         outf.write ( lyrics [i])
 179                         outf.write ("\n")
 180                 outf.write("    >>\n    \\paper{}\n}\n")
 181
 182 def dump_default_bar (outf):
 183         """
 184         Nowadays abc2ly outputs explicits barlines (?)
 185         """
 186         outf.write ("\n\\property Score.defaultBarType=\"empty\"\n")
 187
 188
 189 def dump_slyrics (outf):
 190         ks = voice_idx_dict.keys()
 191         ks.sort ()
 192         for k in ks:
 193                 if re.match('[1-9]', k):
 194                         m = alphabet[string.atoi(k)]
 195                 else:
 196                         m = k
 197                 for i in range (len(slyrics[voice_idx_dict[k]])):
 198                         l=alphabet[i]
 199                         outf.write ("\nwords%sV%s = \\lyrics  {" % (m, l))
 200                         outf.write ("\n" + slyrics [voice_idx_dict[k]][i])
 201                         outf.write ("\n}")
 202
 203 def dump_voices (outf):
 204         global doing_alternative, in_repeat
 205         ks = voice_idx_dict.keys()
 206         ks.sort ()
 207         for k in ks:
 208                 if re.match ('[1-9]', k):
 209                         m = alphabet[string.atoi(k)]
 210                 else:
 211                         m = k
 212                 outf.write ("\nvoice%s = \\notes {" % m)
 213                 dump_default_bar(outf)
 214                 if repeat_state[voice_idx_dict[k]]:
 215                         outf.write("\n\\repeat volta 2 {")
 216                 outf.write ("\n" + voices [voice_idx_dict[k]])
 217                 if not using_old:
 218                         if doing_alternative[voice_idx_dict[k]]:
 219                                 outf.write("}")
 220                         if in_repeat[voice_idx_dict[k]]:
 221                                 outf.write("}")
 222                 outf.write ("\n}")
 223
 224 def try_parse_q(a):
 225         global midi_specs
 226         #assume that Q takes the form "Q:1/4=120"
 227         #There are other possibilities, but they are deprecated
 228         if string.count(a, '/') == 1:
 229                 array=string.split(a,'/')
 230                 numerator=array[0]
 231                 if numerator != 1:
 232                         sys.stderr.write("abc2ly: Warning, unable to translate a Q specification with a numerator of %s: %s\n" % (numerator, a))
 233                 array2=string.split(array[1],'=')
 234                 denominator=array2[0]
 235                 perminute=array2[1]
 236                 duration=str(string.atoi(denominator)/string.atoi(numerator))
 237                 midi_specs=string.join(["\\tempo", duration, "=", perminute])
 238         else:
 239                 sys.stderr.write("abc2ly: Warning, unable to parse Q specification: %s\n" % a)
 240
 241 def dump_score (outf):
 242         outf.write (r"""\score{
 243         \notes <<
 244 """)
 245
 246         ks  = voice_idx_dict.keys ();
 247         ks.sort ()
 248         for k in  ks:
 249                 if re.match('[1-9]', k):
 250                         m = alphabet[string.atoi(k)]
 251                 else:
 252                         m = k
 253                 if k == 'default' and len (voice_idx_dict) > 1:
 254                         break
 255                 if len ( slyrics [voice_idx_dict[k]] ):
 256                         outf.write ("\n        \\addlyrics")
 257                 outf.write ("\n\t\\context Staff=\"%s\"\n\t{\n" %k )
 258                 if k != 'default':
 259                         outf.write ("\t    \\voicedefault\n")
 260                 outf.write ("\t    \\voice%s " % m)
 261                 outf.write ("\n\t}\n")
 262                 if len ( slyrics [voice_idx_dict[k]] ):
 263                         outf.write ("\n\t\\context Lyrics=\"%s\" \n\t<<\t" % k)
 264                         if re.match('[1-9]',k):
 265                                 m = alphabet[string.atoi(k)]
 266                         else:
 267                                 m = k
 268                         for i in range (len(slyrics[voice_idx_dict[k]])):
 269                                 l=alphabet[i]
 270                                 outf.write("\n\t  { \\words%sV%s }" % ( m, l) )
 271                         outf.write ( "\n\t>>\n" )
 272         outf.write ("\n    >>")
 273         outf.write ("\n\t\\paper {\n")
 274         if part_names:
 275                 outf.write ("\t    \\translator \n\t    {\n")
 276                 outf.write ("\t\t\\StaffContext\n")
 277 #               outf.write ("\t\t\\consists Staff_margin_engraver\n")
 278                 outf.write ("\t    }\n")
 279         outf.write ("\t}\n\t\\midi {%s}\n}\n" % midi_specs)
 280
 281
 282
 283 def set_default_length (s):
 284         global length_specified
 285         m =  re.search ('1/([0-9]+)', s)
 286         if m:
 287                 __main__.default_len = string.atoi ( m.group (1))
 288                 length_specified = 1
 289
 290 def set_default_len_from_time_sig (s):
 291         m =  re.search ('([0-9]+)/([0-9]+)', s)
 292         if m:
 293                 n = string.atoi (m.group (1))
 294                 d = string.atoi (m.group (2))
 295                 if (n * 1.0 )/(d * 1.0) <  0.75:
 296                         __main__.default_len =  16
 297                 else:
 298                         __main__.default_len = 8
 299
 300 def gulp_file(f):
 301         try:
 302                 i = open(f)
 303                 i.seek (0, 2)
 304                 n = i.tell ()
 305                 i.seek (0,0)
 306         except:
 307                 sys.stderr.write ("can't open file: `%s'\n" % f)
 308                 return ''
 309         s = i.read (n)
 310         if len (s) <= 0:
 311                 sys.stderr.write ("gulped empty file: `%s'\n" % f)
 312         i.close ()
 313         return s
 314
 315
 316 # pitch manipulation. Tuples are (name, alteration).
 317 # 0 is (central) C. Alteration -1 is a flat, Alteration +1 is a sharp
 318 # pitch in semitones.
 319 def semitone_pitch  (tup):
 320         p =0
 321
 322         t = tup[0]
 323         p = p + 12 * (t / 7)
 324         t = t % 7
 325
 326         if t > 2:
 327                 p = p- 1
 328
 329         p = p + t* 2 + tup[1]
 330         return p
 331
 332 def fifth_above_pitch (tup):
 333         (n, a)  = (tup[0] + 4, tup[1])
 334
 335         difference = 7 - (semitone_pitch ((n,a)) - semitone_pitch (tup))
 336         a = a + difference
 337
 338         return (n,a)
 339
 340 def sharp_keys ():
 341         p = (0,0)
 342         l = []
 343         k = 0
 344         while 1:
 345                 l.append (p)
 346                 (t,a) = fifth_above_pitch (p)
 347                 if semitone_pitch((t,a)) % 12 == 0:
 348                         break
 349
 350                 p = (t % 7, a)
 351         return l
 352
 353 def flat_keys ():
 354         p = (0,0)
 355         l = []
 356         k = 0
 357         while 1:
 358                 l.append (p)
 359                 (t,a) = quart_above_pitch (p)
 360                 if semitone_pitch((t,a)) % 12 == 0:
 361                         break
 362
 363                 p = (t % 7, a)
 364         return l
 365
 366 def quart_above_pitch (tup):
 367         (n, a)  = (tup[0] + 3, tup[1])
 368
 369         difference = 5 - (semitone_pitch ((n,a)) - semitone_pitch (tup))
 370         a = a + difference
 371
 372         return (n,a)
 373
 374 key_lookup = {  # abc to lilypond key mode names
 375         'm'   : 'minor',
 376         'min' : 'minor',
 377         'maj' : 'major',
 378         'major' : 'major',
 379         'phr' : 'phrygian',
 380         'ion' : 'ionian',
 381         'loc' : 'locrian',
 382         'aeo' : 'aeolian',
 383         'mix' : 'mixolydian',
 384         'mixolydian' : 'mixolydian',
 385         'lyd' : 'lydian',
 386         'dor' : 'dorian',
 387         'dorian' : 'dorian'
 388 }
 389
 390 def lily_key (k):
 391         k = string.lower (k)
 392         key = k[0]
 393         k = k[1:]
 394         if k and k[0] == '#':
 395                 key = key + 'is'
 396                 k = k[1:]
 397         elif k and k[0] == 'b':
 398                 key = key + 'es'
 399                 k = k[1:]
 400         if not k:
 401                 return '%s \\major' % key
 402
 403         type = k[0:3]
 404         if key_lookup.has_key(type):
 405                 return("%s \\%s" % ( key, key_lookup[type]))
 406         sys.stderr.write("Unknown key type `%s' ignored\n" % type)
 407         return key
 408
 409 def shift_key (note, acc , shift):
 410         s = semitone_pitch((note, acc))
 411         s = (s + shift + 12) % 12
 412         if s <= 4:
 413                 n = s / 2
 414                 a = s % 2
 415         else:
 416                 n = (s + 1) / 2
 417                 a = (s + 1) % 2
 418         if a:
 419                 n = n + 1
 420                 a = -1
 421         return (n,a)
 422
 423 key_shift = { # semitone shifts for key mode names
 424         'm'   : 3,
 425         'min' : 3,
 426         'minor' : 3,
 427         'maj' : 0,
 428         'major' : 0,
 429         'phr' : -4,
 430         'phrygian' : -4,
 431         'ion' : 0,
 432         'ionian' : 0,
 433         'loc' : 1,
 434         'locrian' : 1,
 435         'aeo' : 3,
 436         'aeolian' : 3,
 437         'mix' : 5,
 438         'mixolydian' : 5,
 439         'lyd' : -5,
 440         'lydian' : -5,
 441         'dor' : -2,
 442         'dorian' :      -2
 443 }
 444 def compute_key (k):
 445         k = string.lower (k)
 446         intkey = (ord (k[0]) - ord('a') + 5) % 7
 447         intkeyacc =0
 448         k = k[1:]
 449
 450         if k and k[0] == 'b':
 451                 intkeyacc = -1
 452                 k = k[1:]
 453         elif  k and k[0] == '#':
 454                 intkeyacc = 1
 455                 k = k[1:]
 456         k = k[0:3]
 457         if k and key_shift.has_key(k):
 458                 (intkey, intkeyacc) = shift_key(intkey, intkeyacc, key_shift[k])
 459         keytup = (intkey, intkeyacc)
 460
 461         sharp_key_seq = sharp_keys ()
 462         flat_key_seq = flat_keys ()
 463
 464         accseq = None
 465         accsign = 0
 466         if keytup in sharp_key_seq:
 467                 accsign = 1
 468                 key_count = sharp_key_seq.index (keytup)
 469                 accseq = map (lambda x: (4*x -1 ) % 7, range (1, key_count + 1))
 470
 471         elif keytup in flat_key_seq:
 472                 accsign = -1
 473                 key_count = flat_key_seq.index (keytup)
 474                 accseq = map (lambda x: (3*x + 3 ) % 7, range (1, key_count + 1))
 475         else:
 476                 error ("Huh?")
 477                 raise "Huh"
 478
 479         key_table = [0] * 7
 480         for a in accseq:
 481                  key_table[a] = key_table[a] + accsign
 482
 483         return key_table
 484
 485 tup_lookup = {
 486         '2' : '3/2',
 487         '3' : '2/3',
 488         '4' : '4/3',
 489         '5' : '4/5',
 490         '6' : '4/6',
 491         '7' : '6/7',
 492         '9' : '8/9',
 493         }
 494
 495
 496 def try_parse_tuplet_begin (str, state):
 497         if re.match ('\([2-9]', str):
 498                 dig = str[1]
 499                 str = str[2:]
 500                 prev_tuplet_state = state.parsing_tuplet
 501                 state.parsing_tuplet = string.atoi (dig[0])
 502                 if prev_tuplet_state:
 503                         voices_append ("}")
 504                 voices_append ("\\times %s {" % tup_lookup[dig])
 505         return str
 506
 507 def  try_parse_group_end (str, state):
 508         if str and str[0] in HSPACE:
 509                 str = str[1:]
 510         return str
 511
 512 def header_append (key, a):
 513         s = ''
 514         if header.has_key (key):
 515                 s = header[key] + "\n"
 516                 header [key] = s + a
 517
 518 def wordwrap(a, v):
 519         linelen = len (v) - string.rfind(v, '\n')
 520         if linelen + len (a) > 80:
 521                 v = v + '\n'
 522         return v + a + ' '
 523
 524 def stuff_append (stuff, idx, a):
 525         if not stuff:
 526                 stuff.append (a)
 527         else:
 528                 stuff [idx] = wordwrap(a, stuff[idx])
 529
 530
 531
 532 def voices_append(a):
 533         if current_voice_idx < 0:
 534                 select_voice ('default', '')
 535         stuff_append (voices, current_voice_idx, a)
 536
 537 def repeat_prepend():
 538         global repeat_state
 539         if current_voice_idx < 0:
 540                 select_voice ('default', '')
 541         if not using_old:
 542                 repeat_state[current_voice_idx] = 't'
 543
 544
 545 def lyrics_append(a):
 546         a = re.sub ( '#', '\\#', a)     # latex does not like naked #'s
 547         a = re.sub ( '"', '\\"', a)     # latex does not like naked "'s
 548         a = '\t{ \\lyrics "' + a + '" }\n'
 549         stuff_append (lyrics, current_lyric_idx, a)
 550
 551 # break lyrics to words and put "'s around words containing numbers and '"'s
 552 def fix_lyric(str):
 553         ret = ''
 554         while str != '':
 555                 m = re.match('[ \t]*([^ \t]*)[ \t]*(.*$)', str)
 556                 if m:
 557                         word = m.group(1)
 558                         str = m.group(2)
 559                         word = re.sub('"', '\\"', word) # escape "
 560                         if re.match('.*[0-9"\(]', word):
 561                                 word = re.sub('_', ' ', word) # _ causes probs inside ""
 562                                 ret = ret + '\"' + word + '\" '
 563                         else:
 564                                 ret = ret + word + ' '
 565                 else:
 566                         return (ret)
 567         return (ret)
 568
 569 def slyrics_append(a):
 570         a = re.sub ( '_', ' _ ', a)     # _ to ' _ '
 571         a = re.sub ( '-', '- ', a)      # split words with -
 572         a = re.sub ( '\\\\- ', '-', a)  # unless \-
 573         a = re.sub ( '~', '_', a)       # ~ to space('_')
 574         a = re.sub ( '\*', '_ ', a)     # * to to space
 575         a = re.sub ( '#', '\\#', a)     # latex does not like naked #'s
 576         if re.match('.*[0-9"\(]', a):   # put numbers and " and ( into quoted string
 577                 a = fix_lyric(a)
 578         a = re.sub ( '$', ' ', a)       # insure space between lines
 579         __main__.lyric_idx = lyric_idx + 1
 580         if len(slyrics[current_voice_idx]) <= lyric_idx:
 581                 slyrics[current_voice_idx].append(a)
 582         else:
 583                 v = slyrics[current_voice_idx][lyric_idx]
 584                 slyrics[current_voice_idx][lyric_idx] = wordwrap(a, slyrics[current_voice_idx][lyric_idx])
 585
 586
 587 def try_parse_header_line (ln, state):
 588         global length_specified
 589         m = re.match ('^([A-Za-z]): *(.*)$', ln)
 590
 591         if m:
 592                 g =m.group (1)
 593                 a = m.group (2)
 594                 if g == 'T':    #title
 595                         a = re.sub('[ \t]*$','', a)     #strip trailing blanks
 596                         if header.has_key('title'):
 597                                 if a:
 598                                         if len(header['title']):
 599                                                 header['title'] = header['title'] + '\\\\\\\\' + a
 600                                         else:
 601                                                 header['subtitle'] = a
 602                         else:
 603                                 header['title'] =  a
 604                 if g == 'M':    # Meter
 605                         if a == 'C':
 606                                 if not state.common_time:
 607                                         state.common_time = 1
 608                                         voices_append ("\\property Staff.TimeSignature \\override #\'style = #'C\n")
 609                                 a = '4/4'
 610                         if a == 'C|':
 611                                 if not state.common_time:
 612                                         state.common_time = 1
 613                                         voices_append ("\\property Staff.TimeSignature \\override #\'style = #'C\n")
 614                                 a = '2/2'
 615                         if not length_specified:
 616                                 set_default_len_from_time_sig (a)
 617                         else:
 618                                 length_specified = 0
 619                         if not a == 'none':
 620                                 voices_append ('\\time %s' % a)
 621                         state.next_bar = ''
 622                 if g == 'K': # KEY
 623                         a = check_clef(a)
 624                         if a:
 625                                 m = re.match ('^([^ \t]*) *(.*)$', a) # seperate clef info
 626                                 if m:
 627                                         # there may or may not be a space
 628                                         # between the key letter and the mode
 629                                         if key_lookup.has_key(m.group(2)[0:3]):
 630                                                 key_info = m.group(1) + m.group(2)[0:3]
 631                                                 clef_info = m.group(2)[4:]
 632                                         else:
 633                                                 key_info = m.group(1)
 634                                                 clef_info = m.group(2)
 635                                         __main__.global_key  = compute_key (key_info)# ugh.
 636                                         voices_append ('\\key %s' % lily_key(key_info))
 637                                         check_clef(clef_info)
 638                                 else:
 639                                         __main__.global_key  = compute_key (a)# ugh.
 640                                         voices_append ('\\key %s \\major' % lily_key(a))
 641                 if g == 'N': # Notes
 642                         header ['footnotes'] = header['footnotes'] +  '\\\\\\\\' + a
 643                 if g == 'O': # Origin
 644                         header ['origin'] = a
 645                 if g == 'X': # Reference Number
 646                         header ['crossRefNumber'] = a
 647                 if g == 'A': #  Area
 648                         header ['area'] = a
 649                 if g == 'H':    # History
 650                         header_append ('history', a)
 651                 if g == 'B':    # Book
 652                         header ['book'] = a
 653                 if g == 'C':    # Composer
 654                         if header.has_key('composer'):
 655                                 if a:
 656                                         header['composer'] = header['composer'] + '\\\\\\\\' + a
 657                         else:
 658                                 header['composer'] =  a
 659                 if g == 'S':
 660                         header ['subtitle'] = a
 661                 if g == 'L':    # Default note length
 662                         set_default_length (ln)
 663                 if g == 'V':    # Voice
 664                         voice = re.sub (' .*$', '', a)
 665                         rest = re.sub ('^[^ \t]*  *', '', a)
 666                         if state.next_bar:
 667                                 voices_append(state.next_bar)
 668                                 state.next_bar = ''
 669                         select_voice (voice, rest)
 670                 if g == 'W':    # Words
 671                         lyrics_append(a)
 672                 if g == 'w':    # vocals
 673                         slyrics_append (a)
 674                 if g == 'Q':    #tempo
 675                         try_parse_q (a)
 676                 return ''
 677         return ln
 678
 679 # we use in this order specified accidental, active accidental for bar,
 680 # active accidental for key
 681 def pitch_to_lilypond_name (name, acc, bar_acc, key):
 682         s = ''
 683         if acc == UNDEF:
 684                 if not nobarlines:
 685                         acc = bar_acc
 686         if acc == UNDEF:
 687                 acc = key
 688         if acc == -1:
 689                 s = 'es'
 690         elif acc == 1:
 691                 s =  'is'
 692
 693         if name > 4:
 694                 name = name -7
 695         return(chr (name  + ord('c')) + s)
 696
 697
 698 def octave_to_lilypond_quotes (o):
 699         o = o + 2
 700         s =''
 701         if o < 0:
 702                 o = -o
 703                 s=','
 704         else:
 705                 s ='\''
 706
 707         return s * o
 708
 709 def parse_num (str):
 710         durstr = ''
 711         while str and str[0] in DIGITS:
 712                 durstr = durstr + str[0]
 713                 str = str[1:]
 714
 715         n = None
 716         if durstr:
 717                 n  =string.atoi (durstr)
 718         return (str,n)
 719
 720
 721 def duration_to_lilypond_duration  (multiply_tup, defaultlen, dots):
 722         base = 1
 723         # (num /  den)  / defaultlen < 1/base
 724         while base * multiply_tup[0] < multiply_tup[1]:
 725                 base = base * 2
 726         if base == 1:
 727                 if (multiply_tup[0] / multiply_tup[1])  == 2:
 728                         base = '\\breve'
 729                 if (multiply_tup[0] / multiply_tup[1]) == 3:
 730                         base = '\\breve'
 731                         dots = 1
 732                 if (multiply_tup[0] / multiply_tup[1]) == 4:
 733                         base = '\longa'
 734         return '%s%s' % ( base, '.'* dots)
 735
 736 class Parser_state:
 737         def __init__ (self):
 738                 self.in_acc = {}
 739                 self.next_articulation = ''
 740                 self.next_bar = ''
 741                 self.next_dots = 0
 742                 self.next_den = 1
 743                 self.parsing_tuplet = 0
 744                 self.plus_chord = 0
 745                 self.base_octave = 0
 746                 self.common_time = 0
 747
 748
 749
 750 # return (str, num,den,dots)
 751 def parse_duration (str, parser_state):
 752         num = 0
 753         den = parser_state.next_den
 754         parser_state.next_den = 1
 755
 756         (str, num) = parse_num (str)
 757         if not num:
 758                 num = 1
 759         if len(str):
 760                 if str[0] == '/':
 761                         if len(str[0]):
 762                                 while str[:1] == '/':
 763                                         str= str[1:]
 764                                         d = 2
 765                                         if str[0] in DIGITS:
 766                                                 (str, d) =parse_num (str)
 767
 768                                         den = den * d
 769
 770         den = den * default_len
 771
 772         current_dots = parser_state.next_dots
 773         parser_state.next_dots = 0
 774         if re.match ('[ \t]*[<>]', str):
 775                 while str[0] in HSPACE:
 776                         str = str[1:]
 777                 while str[0] == '>':
 778                         str = str [1:]
 779                         current_dots = current_dots + 1
 780                         parser_state.next_den = parser_state.next_den * 2
 781
 782                 while str[0] == '<':
 783                         str = str [1:]
 784                         den = den * 2
 785                         parser_state.next_dots = parser_state.next_dots + 1
 786
 787
 788
 789         try_dots = [3, 2, 1]
 790         for d in try_dots:
 791                 f = 1 << d
 792                 multiplier = (2*f-1)
 793                 if num % multiplier == 0 and den % f == 0:
 794                         num = num / multiplier
 795                         den = den / f
 796                         current_dots = current_dots + d
 797
 798         return (str, num,den,current_dots)
 799
 800
 801 def try_parse_rest (str, parser_state):
 802         if not str or str[0] <> 'z' and str[0] <> 'x':
 803                 return str
 804
 805         __main__.lyric_idx = -1
 806
 807         if parser_state.next_bar:
 808                 voices_append(parser_state.next_bar)
 809                 parser_state.next_bar = ''
 810
 811         if str[0] == 'z':
 812                 rest = 'r'
 813         else:
 814                 rest = 's'
 815         str = str[1:]
 816
 817         (str, num,den,d) = parse_duration (str, parser_state)
 818         voices_append ('%s%s' % (rest, duration_to_lilypond_duration ((num,den), default_len, d)))
 819         if parser_state.next_articulation:
 820                 voices_append (parser_state.next_articulation)
 821                 parser_state.next_articulation = ''
 822
 823         return str
 824
 825 artic_tbl = {
 826         '.'  : '-.',
 827          'T' : '^\\trill',
 828          'H' : '^\\fermata',
 829          'u' : '^\\upbow',
 830          'K' : '^\\ltoe',
 831          'k' : '^\\accent',
 832          'M' : '^\\tenuto',
 833          '~' : '^"~" ',
 834          'J' : '',              # ignore slide
 835          'R' : '',              # ignore roll
 836          'v' : '^\\downbow'
 837 }
 838
 839 def try_parse_articulation (str, state):
 840         while str and  artic_tbl.has_key(str[:1]):
 841                 state.next_articulation = state.next_articulation + artic_tbl[str[:1]]
 842                 if not artic_tbl[str[:1]]:
 843                         sys.stderr.write("Warning: ignoring `%s'\n" % str[:1] )
 844
 845                 str = str[1:]
 846
 847
 848
 849         # s7m2 input doesnt care about spaces
 850         if re.match('[ \t]*\(', str):
 851                 str = string.lstrip (str)
 852
 853         slur_begin =0
 854         while str[:1] =='(' and str[1] not in DIGITS:
 855                 slur_begin = slur_begin + 1
 856                 state.next_articulation = state.next_articulation + '('
 857                 str = str[1:]
 858
 859         return str
 860
 861 #
 862 # remember accidental for rest of bar
 863 #
 864 def set_bar_acc(note, octave, acc, state):
 865         if acc == UNDEF:
 866                 return
 867         n_oct = note + octave * 7
 868         state.in_acc[n_oct] = acc
 869
 870 # get accidental set in this bar or UNDEF if not set
 871 def get_bar_acc(note, octave, state):
 872         n_oct = note + octave * 7
 873         if state.in_acc.has_key(n_oct):
 874                 return(state.in_acc[n_oct])
 875         else:
 876                 return(UNDEF)
 877
 878 def clear_bar_acc(state):
 879         for k in state.in_acc.keys():
 880                 del state.in_acc[k]
 881
 882
 883
 884 # WAT IS ABC EEN ONTZETTENDE PROGRAMMEERPOEP  !
 885 def try_parse_note (str, parser_state):
 886         mud = ''
 887
 888         slur_begin =0
 889         if not str:
 890                 return str
 891
 892         articulation =''
 893         acc = UNDEF
 894         if str[0] in '^=_':
 895                 c = str[0]
 896                 str = str[1:]
 897                 if c == '^':
 898                         acc = 1
 899                 if c == '=':
 900                         acc = 0
 901                 if c == '_':
 902                         acc = -1
 903
 904         octave = parser_state.base_octave
 905         if str[0] in "ABCDEFG":
 906                 str = string.lower (str[0]) + str[1:]
 907                 octave = octave - 1
 908
 909
 910         notename = 0
 911         if str[0] in "abcdefg":
 912                 notename = (ord(str[0]) - ord('a') + 5)%7
 913                 str = str[1:]
 914         else:
 915                 return str              # failed; not a note!
 916
 917
 918         __main__.lyric_idx = -1
 919
 920         if parser_state.next_bar:
 921                 voices_append(parser_state.next_bar)
 922                 parser_state.next_bar = ''
 923
 924         while str[0] == ',':
 925                  octave = octave - 1
 926                  str = str[1:]
 927         while str[0] == '\'':
 928                  octave = octave + 1
 929                  str = str[1:]
 930
 931         (str, num,den,current_dots) = parse_duration (str, parser_state)
 932
 933         if re.match('[ \t]*\)', str):
 934                 str = string.lstrip (str)
 935
 936         slur_end =0
 937         while str[:1] ==')':
 938                 slur_end = slur_end + 1
 939                 str = str[1:]
 940
 941
 942         bar_acc = get_bar_acc(notename, octave, parser_state)
 943         pit = pitch_to_lilypond_name(notename, acc, bar_acc, global_key[notename])
 944         oct = octave_to_lilypond_quotes (octave)
 945         if acc != UNDEF and (acc == global_key[notename] or acc == bar_acc):
 946                 mod='!'
 947         else:
 948                 mod = ''
 949         voices_append ("%s%s%s%s" %
 950                 (pit, oct, mod,
 951                  duration_to_lilypond_duration ((num,den), default_len, current_dots)))
 952
 953         set_bar_acc(notename, octave, acc, parser_state)
 954         if parser_state.next_articulation:
 955                 articulation = articulation + parser_state.next_articulation
 956                 parser_state.next_articulation = ''
 957
 958         voices_append (articulation)
 959
 960         if parser_state.parsing_tuplet:
 961                 parser_state.parsing_tuplet = parser_state.parsing_tuplet - 1
 962                 if not parser_state.parsing_tuplet:
 963                         voices_append ("}")
 964         if slur_begin:
 965                 voices_append ('-(' * slur_begin )
 966         if slur_end:
 967                 voices_append ('-)' *slur_end )
 968
 969
 970
 971         return str
 972
 973 def junk_space (str):
 974         while str and str[0] in '\t\n ':
 975                 str = str[1:]
 976
 977         return str
 978
 979
 980 def try_parse_guitar_chord (str, state):
 981         if str[:1] =='"':
 982                 str = str[1:]
 983                 gc = ''
 984                 if str[0] == '_' or (str[0] == '^'):
 985                         position = str[0]
 986                         str = str[1:]
 987                 else:
 988                         position = '^'
 989                 while str and str[0] != '"':
 990                         gc = gc + str[0]
 991                         str = str[1:]
 992
 993                 if str:
 994                         str = str[1:]
 995                 gc = re.sub('#', '\\#', gc)     # escape '#'s
 996                 state.next_articulation = ("%c\"%s\"" % (position ,gc)) + state.next_articulation
 997         return str
 998
 999 def try_parse_escape (str):
1000         if not str or str [0] != '\\':
1001                 return str
1002
1003         str = str[1:]
1004         if str[:1] =='K':
1005                 key_table = compute_key ()
1006         return str
1007
1008 #
1009 # |] thin-thick double bar line
1010 # || thin-thin double bar line
1011 # [| thick-thin double bar line
1012 # :| left repeat
1013 # |: right repeat
1014 # :: left-right repeat
1015 # |1 volta 1
1016 # |2 volta 2
1017 old_bar_dict = {
1018 '|]' : '|.',
1019 '||' : '||',
1020 '[|' : '||',
1021 ':|' : ':|',
1022 '|:' : '|:',
1023 '::' : ':|:',
1024 '|1' : '|',
1025 '|2' : '|',
1026 ':|2' : ':|',
1027 '|' :  '|'
1028 }
1029 bar_dict = {
1030  '|]' : '\\bar "|."',
1031  '||' : '\\bar "||"',
1032  '[|' : '\\bar "||"',
1033  ':|' : '}',
1034  '|:' : '\\repeat volta 2 {',
1035  '::' : '} \\repeat volta 2 {',
1036  '|1' : '} \\alternative{{',
1037  '|2' : '} {',
1038  ':|2' : '} {',
1039  '|' :  '\\bar "|"'
1040   }
1041
1042
1043 warn_about = ['|:', '::', ':|', '|1', ':|2', '|2']
1044 alternative_opener = ['|1', '|2', ':|2']
1045 repeat_ender = ['::', ':|']
1046 repeat_opener = ['::', '|:']
1047 in_repeat = [''] * 8
1048 doing_alternative = [''] * 8
1049 using_old = ''
1050
1051 def try_parse_bar (str,state):
1052         global in_repeat, doing_alternative, using_old
1053         do_curly = ''
1054         bs = None
1055         if current_voice_idx < 0:
1056                 select_voice ('default', '')
1057         # first try the longer one
1058         for trylen in [3,2,1]:
1059                 if str[:trylen] and bar_dict.has_key (str[:trylen]):
1060                         s = str[:trylen]
1061                         if using_old:
1062                                 bs = "\\bar \"%s\"" % old_bar_dict[s]
1063                         else:
1064                                 bs = "%s" % bar_dict[s]
1065                         str = str[trylen:]
1066                         if s in alternative_opener:
1067                                 if not in_repeat[current_voice_idx]:
1068                                         using_old = 't'
1069                                         bs = "\\bar \"%s\"" % old_bar_dict[s]
1070                                 else:
1071                                         doing_alternative[current_voice_idx] = 't'
1072
1073                         if s in repeat_ender:
1074                                 if not in_repeat[current_voice_idx]:
1075                                         sys.stderr.write("Warning: inserting repeat to beginning of notes.\n")
1076                                         repeat_prepend()
1077                                         in_repeat[current_voice_idx] = ''
1078                                 else:
1079                                         if doing_alternative[current_voice_idx]:
1080                                                 do_curly = 't'
1081                                 if using_old:
1082                                         bs = "\\bar \"%s\"" % old_bar_dict[s]
1083                                 else:
1084                                         bs =  bar_dict[s]
1085                                 doing_alternative[current_voice_idx] = ''
1086                                 in_repeat[current_voice_idx] = ''
1087                         if s in repeat_opener:
1088                                 in_repeat[current_voice_idx] = 't'
1089                                 if using_old:
1090                                         bs = "\\bar \"%s\"" % old_bar_dict[s]
1091                                 else:
1092                                         bs =  bar_dict[s]
1093                         break
1094         if str[:1] == '|':
1095                 state.next_bar = '|\n'
1096                 str = str[1:]
1097                 clear_bar_acc(state)
1098
1099         if bs <> None or state.next_bar != '':
1100                 if state.parsing_tuplet:
1101                         state.parsing_tuplet =0
1102                         voices_append ('} ')
1103
1104         if bs <> None:
1105                 clear_bar_acc(state)
1106                 voices_append (bs)
1107                 if do_curly != '':
1108                         voices_append("} }")
1109                         do_curly = ''
1110         return str
1111
1112 def try_parse_tie (str):
1113         if str[:1] =='-':
1114                 str = str[1:]
1115                 voices_append (' ~ ')
1116         return str
1117
1118 def bracket_escape (str, state):
1119         m = re.match ( '^([^\]]*)] *(.*)$', str)
1120         if m:
1121                 cmd = m.group (1)
1122                 str = m.group (2)
1123                 try_parse_header_line (cmd, state)
1124         return str
1125
1126 def try_parse_chord_delims (str, state):
1127         if str[:1] =='[':
1128                 str = str[1:]
1129                 if re.match('[A-Z]:', str):     # bracket escape
1130                         return bracket_escape(str, state)
1131                 if state.next_bar:
1132                         voices_append(state.next_bar)
1133                         state.next_bar = ''
1134                 voices_append ('<')
1135
1136         if str[:1] == '+':
1137                 str = str[1:]
1138                 if state.plus_chord:
1139                         voices_append ('>')
1140                         state.plus_chord = 0
1141                 else:
1142                         if state.next_bar:
1143                                 voices_append(state.next_bar)
1144                                 state.next_bar = ''
1145                         voices_append ('<')
1146                         state.plus_chord = 1
1147
1148         ch = ''
1149         if str[:1] ==']':
1150                 str = str[1:]
1151                 ch = '>'
1152
1153         end = 0
1154         while str[:1] ==')':
1155                 end = end + 1
1156                 str = str[1:]
1157
1158
1159         voices_append ("\\spanrequest \\stop \"slur\"" * end)
1160         voices_append (ch)
1161         return str
1162
1163 def try_parse_grace_delims (str, state):
1164         if str[:1] =='{':
1165                 if state.next_bar:
1166                         voices_append(state.next_bar)
1167                         state.next_bar = ''
1168                 str = str[1:]
1169                 voices_append ('\\grace { ')
1170
1171         if str[:1] =='}':
1172                 str = str[1:]
1173                 voices_append ('}')
1174
1175         return str
1176
1177 def try_parse_comment (str):
1178         global nobarlines
1179         if (str[0] == '%'):
1180                 if str[0:5] == '%MIDI':
1181 #the nobarlines option is necessary for an abc to lilypond translator for
1182 #exactly the same reason abc2midi needs it: abc requires the user to enter
1183 #the note that will be printed, and MIDI and lilypond expect entry of the
1184 #pitch that will be played.
1185 #
1186 #In standard 19th century musical notation, the algorithm for translating
1187 #between printed note and pitch involves using the barlines to determine
1188 #the scope of the accidentals.
1189 #
1190 #Since ABC is frequently used for music in styles that do not use this
1191 #convention, such as most music written before 1700, or ethnic music in
1192 #non-western scales, it is necessary to be able to tell a translator that
1193 #the barlines should not affect its interpretation of the pitch.
1194                         if (string.find(str,'nobarlines') > 0):
1195                                 nobarlines = 1
1196                 elif str[0:3] == '%LY':
1197                         p = string.find(str, 'voices')
1198                         if (p > -1):
1199                                 voices_append(str[p+7:])
1200                                 voices_append("\n")
1201                         p = string.find(str, 'slyrics')
1202                         if (p > -1):
1203                                 slyrics_append(str[p+8:])
1204
1205 #write other kinds of appending  if we ever need them.
1206         return str
1207
1208 happy_count = 100
1209 def parse_file (fn):
1210         f = open (fn)
1211         ls = f.readlines ()
1212
1213         select_voice('default', '')
1214         lineno = 0
1215         sys.stderr.write ("Line ... ")
1216         sys.stderr.flush ()
1217         __main__.state = state_list[current_voice_idx]
1218
1219         for ln in ls:
1220                 lineno = lineno + 1
1221
1222                 if not (lineno % happy_count):
1223                         sys.stderr.write ('[%d]'% lineno)
1224                         sys.stderr.flush ()
1225                 m = re.match  ('^([^%]*)%(.*)$',ln)  # add comments to current voice
1226                 if m:
1227                         if m.group(2):
1228                                 try_parse_comment(m.group(2))
1229                                 voices_append ('%% %s\n' % m.group(2))
1230                         ln = m.group (1)
1231
1232                 orig_ln = ln
1233
1234                 ln = try_parse_header_line (ln, state)
1235
1236                 # Try nibbling characters off until the line doesn't change.
1237                 prev_ln = ''
1238                 while ln != prev_ln:
1239                         prev_ln = ln
1240                         ln = try_parse_chord_delims (ln, state)
1241                         ln = try_parse_rest (ln, state)
1242                         ln = try_parse_articulation (ln,state)
1243                         ln = try_parse_note  (ln, state)
1244                         ln = try_parse_bar (ln, state)
1245                         ln = try_parse_tie (ln)
1246                         ln = try_parse_escape (ln)
1247                         ln = try_parse_guitar_chord (ln, state)
1248                         ln = try_parse_tuplet_begin (ln, state)
1249                         ln = try_parse_group_end (ln, state)
1250                         ln = try_parse_grace_delims (ln, state)
1251                         ln = junk_space (ln)
1252
1253                 if ln:
1254                         error ("%s: %d: Huh?  Don't understand\n" % (fn, lineno))
1255                         left = orig_ln[0:-len (ln)]
1256                         sys.stderr.write (left + '\n')
1257                         sys.stderr.write (' ' *  len (left) + ln + '\n')
1258
1259
1260 def identify():
1261         sys.stderr.write ("%s from LilyPond %s\n" % (program_name, version))
1262
1263 def help ():
1264         print r"""
1265 Convert ABC to lilypond.
1266
1267 Usage: abc2ly [OPTIONS]... ABC-FILE
1268
1269 Options:
1270   -h, --help          print this help
1271   -o, --output=FILE   set output filename to FILE
1272   -v, --version       show version information
1273   -s, --strict        be strict about succes
1274
1275 This program converts ABC music files (see
1276 http://www.gre.ac.uk/~c.walshaw/abc2mtex/abc.txt) to LilyPond input.
1277
1278
1279 Report bugs to bug-lilypond@gnu.org.
1280
1281 Written by Han-Wen Nienhuys <hanwen@cs.uu.nl>, Laura Conrad
1282 <lconrad@laymusic.org>, Roy Rankin <Roy.Rankin@@alcatel.com.au>.
1283 """
1284
1285 def print_version ():
1286         print r"""abc2ly (GNU lilypond) %s""" % version
1287
1288
1289
1290 (options, files) = getopt.getopt (sys.argv[1:], 'vo:hs', ['help','version', 'output=', 'strict'])
1291 out_filename = ''
1292
1293 for opt in options:
1294         o = opt[0]
1295         a = opt[1]
1296         if o== '--help' or o == '-h':
1297                 help ()
1298                 sys.exit (0)
1299         elif o == '--version' or o == '-v':
1300                 print_version ()
1301                 sys.exit(0)
1302         elif o == '--strict' or o == '-s':
1303                 strict = 1
1304         elif o == '--output' or o == '-o':
1305                 out_filename = a
1306         else:
1307                 print o
1308                 raise getopt.error
1309
1310 identify()
1311
1312 header['tagline'] = 'Lily was here %s -- automatically converted from ABC' % version
1313 for f in files:
1314         if f == '-':
1315                 f = ''
1316
1317         sys.stderr.write ('Parsing `%s\'...\n' % f)
1318         parse_file (f)
1319
1320         if not out_filename:
1321                 out_filename = os.path.basename (os.path.splitext (f)[0]) + ".ly"
1322         sys.stderr.write ('lilypond output to: `%s\'...' % out_filename)
1323         outf = open (out_filename, 'w')
1324
1325 #       dump_global (outf)
1326         dump_header (outf ,header)
1327         dump_slyrics (outf)
1328         dump_voices (outf)
1329         dump_score (outf)
1330         dump_lyrics (outf)
1331         sys.stderr.write ('\n')
1332