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abc2xml.py
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abc2xml.py
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#!/usr/bin/env python
# coding=latin-1
'''
Copyright (C) 2012-2018: Willem G. Vree
Contributions: Nils Liberg, Nicolas Froment, Norman Schmidt, Reinier Maliepaard, Martin Tarenskeen,
Paul Villiger, Alexander Scheutzow, Herbert Schneider, David Randolph, Michael Strasser
This program is free software; you can redistribute it and/or modify it under the terms of the
Lesser GNU General Public License as published by the Free Software Foundation;
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 Lesser GNU General Public License for more details. <http://www.gnu.org/licenses/lgpl.html>.
'''
from functools import reduce
from pyparsing import Word, OneOrMore, Optional, Literal, NotAny, MatchFirst
from pyparsing import Group, oneOf, Suppress, ZeroOrMore, Combine, FollowedBy
from pyparsing import srange, CharsNotIn, StringEnd, LineEnd, White, Regex
from pyparsing import nums, alphas, alphanums, ParseException, Forward
try: import xml.etree.cElementTree as E
except: import xml.etree.ElementTree as E
import types, sys, os, re, datetime
VERSION = 239
python3 = sys.version_info[0] > 2
lmap = lambda f, xs: list (map (f, xs)) # eager map for python 3
if python3:
int_type = int
list_type = list
str_type = str
uni_type = str
stdin = sys.stdin.buffer if sys.stdin else None # read binary if stdin available!
else:
int_type = types.IntType
list_type = types.ListType
str_type = types.StringTypes
uni_type = types.UnicodeType
stdin = sys.stdin
info_list = [] # diagnostic messages
def info (s, warn=1):
x = (warn and '-- ' or '') + s
info_list.append (x + '\n') # collect messages
if __name__ == '__main__': # only write to stdout when called as main progeam
try: sys.stderr.write (x + '\n')
except: sys.stderr.write (repr (x) + '\n')
def getInfo (): # get string of diagnostic messages, then clear messages
global info_list
xs = ''.join (info_list)
info_list = []
return xs
def abc_grammar (): # header, voice and lyrics grammar for ABC
#-----------------------------------------------------------------
# expressions that catch and skip some syntax errors (see corresponding parse expressions)
#-----------------------------------------------------------------
b1 = Word (u"-,'<>\u2019#", exact=1) # catch misplaced chars in chords
b2 = Regex ('[^H-Wh-w~=]*') # same in user defined symbol definition
b3 = Regex ('[^=]*') # same, second part
#-----------------------------------------------------------------
# ABC header (field_str elements are matched later with reg. epr's)
#-----------------------------------------------------------------
number = Word (nums).setParseAction (lambda t: int (t[0]))
field_str = Regex (r'[^]]*') # match anything until end of field
field_str.setParseAction (lambda t: t[0].strip ()) # and strip spacing
userdef_symbol = Word (srange ('[H-Wh-w~]'), exact=1)
fieldId = oneOf ('K L M Q P I T C O A Z N G H R B D F S E r Y') # info fields
X_field = Literal ('X') + Suppress (':') + field_str
U_field = Literal ('U') + Suppress (':') + b2 + Optional (userdef_symbol, 'H') + b3 + Suppress ('=') + field_str
V_field = Literal ('V') + Suppress (':') + Word (alphanums + '_') + field_str
inf_fld = fieldId + Suppress (':') + field_str
ifield = Suppress ('[') + (X_field | U_field | V_field | inf_fld) + Suppress (']')
abc_header = OneOrMore (ifield) + StringEnd ()
#---------------------------------------------------------------------------------
# I:score with recursive part groups and {* grand staff marker
#---------------------------------------------------------------------------------
voiceId = Suppress (Optional ('*')) + Word (alphanums + '_')
voice_gr = Suppress ('(') + OneOrMore (voiceId | Suppress ('|')) + Suppress (')')
simple_part = voiceId | voice_gr | Suppress ('|')
grand_staff = oneOf ('{* {') + OneOrMore (simple_part) + Suppress ('}')
part = Forward ()
part_seq = OneOrMore (part | Suppress ('|'))
brace_gr = Suppress ('{') + part_seq + Suppress ('}')
bracket_gr = Suppress ('[') + part_seq + Suppress (']')
part <<= MatchFirst (simple_part | grand_staff | brace_gr | bracket_gr | Suppress ('|'))
abc_scoredef = Suppress (oneOf ('staves score')) + OneOrMore (part)
#----------------------------------------
# ABC lyric lines (white space sensitive)
#----------------------------------------
skip_note = oneOf ('* - ~')
extend_note = Literal ('_')
measure_end = Literal ('|')
syl_str = CharsNotIn ('*~-_| \t\n\\]')
syl_chars = Combine (OneOrMore (syl_str | Regex (r'\\.')))
white = Word (' \t')
syllable = Combine (Optional ('~') + syl_chars + ZeroOrMore (Literal ('~') + syl_chars)) + Optional ('-')
lyr_elem = (syllable | skip_note | extend_note | measure_end) + Optional (white).suppress ()
lyr_line = Optional (white).suppress () + ZeroOrMore (lyr_elem)
syllable.setParseAction (lambda t: pObj ('syl', t))
skip_note.setParseAction (lambda t: pObj ('skip', t))
extend_note.setParseAction (lambda t: pObj ('ext', t))
measure_end.setParseAction (lambda t: pObj ('sbar', t))
lyr_line_wsp = lyr_line.leaveWhitespace () # parse actions must be set before calling leaveWhitespace
#---------------------------------------------------------------------------------
# ABC voice (not white space sensitive, beams detected in note/rest parse actions)
#---------------------------------------------------------------------------------
inline_field = Suppress ('[') + (inf_fld | U_field | V_field) + Suppress (']')
lyr_fld = Suppress ('[') + Suppress ('w') + Suppress (':') + lyr_line_wsp + Suppress (']') # lyric line
lyr_blk = OneOrMore (lyr_fld) # verses
fld_or_lyr = inline_field | lyr_blk # inline field or block of lyric verses
note_length = Optional (number, 1) + Group (ZeroOrMore ('/')) + Optional (number, 2)
octaveHigh = OneOrMore ("'").setParseAction (lambda t: len(t))
octaveLow = OneOrMore (',').setParseAction (lambda t: -len(t))
octave = octaveHigh | octaveLow
basenote = oneOf ('C D E F G A B c d e f g a b y') # includes spacer for parse efficiency
accidental = oneOf ('^^ __ ^ _ =')
rest_sym = oneOf ('x X z Z')
slur_beg = oneOf ("( (, (' .( .(, .('") + ~Word (nums) # no tuplet_start
slur_ends = OneOrMore (oneOf (') .)'))
long_decoration = Combine (oneOf ('! +') + CharsNotIn ('!+ \n') + oneOf ('! +'))
staccato = Literal ('.') + ~Literal ('|') # avoid dotted barline
pizzicato = Literal ('!+!') # special case: plus sign is old style deco marker
decoration = slur_beg | staccato | userdef_symbol | long_decoration | pizzicato
decorations = OneOrMore (decoration)
tie = oneOf ('.- -')
rest = Optional (accidental) + rest_sym + note_length
pitch = Optional (accidental) + basenote + Optional (octave, 0)
note = pitch + note_length + Optional (tie) + Optional (slur_ends)
dec_note = Optional (decorations) + pitch + note_length + Optional (tie) + Optional (slur_ends)
chord_note = dec_note | rest | b1
grace_notes = Forward ()
chord = Suppress ('[') + OneOrMore (chord_note | grace_notes) + Suppress (']') + note_length + Optional (tie) + Optional (slur_ends)
stem = note | chord | rest
broken = Combine (OneOrMore ('<') | OneOrMore ('>'))
tuplet_num = Suppress ('(') + number
tuplet_into = Suppress (':') + Optional (number, 0)
tuplet_notes = Suppress (':') + Optional (number, 0)
tuplet_start = tuplet_num + Optional (tuplet_into + Optional (tuplet_notes))
acciaccatura = Literal ('/')
grace_stem = Optional (decorations) + stem
grace_notes <<= Group (Suppress ('{') + Optional (acciaccatura) + OneOrMore (grace_stem) + Suppress ('}'))
text_expression = Optional (oneOf ('^ _ < > @'), '^') + Optional (CharsNotIn ('"'), "")
chord_accidental = oneOf ('# b =')
triad = oneOf ('ma Maj maj M mi min m aug dim o + -')
seventh = oneOf ('7 ma7 Maj7 M7 maj7 mi7 min7 m7 dim7 o7 -7 aug7 +7 m7b5 mi7b5')
sixth = oneOf ('6 ma6 M6 mi6 min6 m6')
ninth = oneOf ('9 ma9 M9 maj9 Maj9 mi9 min9 m9')
elevn = oneOf ('11 ma11 M11 maj11 Maj11 mi11 min11 m11')
thirt = oneOf ('13 ma13 M13 maj13 Maj13 mi13 min13 m13')
suspended = oneOf ('sus sus2 sus4')
chord_degree = Combine (Optional (chord_accidental) + oneOf ('2 4 5 6 7 9 11 13'))
chord_kind = Optional (seventh | sixth | ninth | elevn | thirt | triad) + Optional (suspended)
chord_root = oneOf ('C D E F G A B') + Optional (chord_accidental)
chord_bass = oneOf ('C D E F G A B') + Optional (chord_accidental) # needs a different parse action
chordsym = chord_root + chord_kind + ZeroOrMore (chord_degree) + Optional (Suppress ('/') + chord_bass)
chord_sym = chordsym + Optional (Literal ('(') + CharsNotIn (')') + Literal (')')).suppress ()
chord_or_text = Suppress ('"') + (chord_sym ^ text_expression) + Suppress ('"')
volta_nums = Optional ('[').suppress () + Combine (Word (nums) + ZeroOrMore (oneOf (', -') + Word (nums)))
volta_text = Literal ('[').suppress () + Regex (r'"[^"]+"')
volta = volta_nums | volta_text
invisible_barline = oneOf ('[|] []')
dashed_barline = oneOf (': .|')
double_rep = Literal (':') + FollowedBy (':') # otherwise ambiguity with dashed barline
voice_overlay = Combine (OneOrMore ('&'))
bare_volta = FollowedBy (Literal ('[') + Word (nums)) # no barline, but volta follows (volta is parsed in next measure)
bar_left = (oneOf ('[|: |: [: :') + Optional (volta)) | Optional ('|').suppress () + volta | oneOf ('| [|')
bars = ZeroOrMore (':') + ZeroOrMore ('[') + OneOrMore (oneOf ('| ]'))
bar_right = invisible_barline | double_rep | Combine (bars) | dashed_barline | voice_overlay | bare_volta
errors = ~bar_right + Optional (Word (' \n')) + CharsNotIn (':&|', exact=1)
linebreak = Literal ('$') | ~decorations + Literal ('!') # no need for I:linebreak !!!
element = fld_or_lyr | broken | decorations | stem | chord_or_text | grace_notes | tuplet_start | linebreak | errors
measure = Group (ZeroOrMore (inline_field) + Optional (bar_left) + ZeroOrMore (element) + bar_right + Optional (linebreak) + Optional (lyr_blk))
noBarMeasure = Group (ZeroOrMore (inline_field) + Optional (bar_left) + OneOrMore (element) + Optional (linebreak) + Optional (lyr_blk))
abc_voice = ZeroOrMore (measure) + Optional (noBarMeasure | Group (bar_left)) + ZeroOrMore (inline_field).suppress () + StringEnd ()
#----------------------------------------
# I:percmap note [step] [midi] [note-head]
#----------------------------------------
white2 = (white | StringEnd ()).suppress ()
w3 = Optional (white2)
percid = Word (alphanums + '-')
step = basenote + Optional (octave, 0)
pitchg = Group (Optional (accidental, '') + step + FollowedBy (white2))
stepg = Group (step + FollowedBy (white2)) | Literal ('*')
midi = (Literal ('*') | number | pitchg | percid)
nhd = Optional (Combine (percid + Optional ('+')), '')
perc_wsp = Literal ('percmap') + w3 + pitchg + w3 + Optional (stepg, '*') + w3 + Optional (midi, '*') + w3 + nhd
abc_percmap = perc_wsp.leaveWhitespace ()
#----------------------------------------------------------------
# Parse actions to convert all relevant results into an abstract
# syntax tree where all tree nodes are instances of pObj
#----------------------------------------------------------------
ifield.setParseAction (lambda t: pObj ('field', t))
grand_staff.setParseAction (lambda t: pObj ('grand', t, 1)) # 1 = keep ordered list of results
brace_gr.setParseAction (lambda t: pObj ('bracegr', t, 1))
bracket_gr.setParseAction (lambda t: pObj ('bracketgr', t, 1))
voice_gr.setParseAction (lambda t: pObj ('voicegr', t, 1))
voiceId.setParseAction (lambda t: pObj ('vid', t, 1))
abc_scoredef.setParseAction (lambda t: pObj ('score', t, 1))
note_length.setParseAction (lambda t: pObj ('dur', (t[0], (t[2] << len (t[1])) >> 1)))
chordsym.setParseAction (lambda t: pObj ('chordsym', t))
chord_root.setParseAction (lambda t: pObj ('root', t))
chord_kind.setParseAction (lambda t: pObj ('kind', t))
chord_degree.setParseAction (lambda t: pObj ('degree', t))
chord_bass.setParseAction (lambda t: pObj ('bass', t))
text_expression.setParseAction (lambda t: pObj ('text', t))
inline_field.setParseAction (lambda t: pObj ('inline', t))
lyr_fld.setParseAction (lambda t: pObj ('lyr_fld', t, 1))
lyr_blk.setParseAction (lambda t: pObj ('lyr_blk', t, 1)) # 1 = keep ordered list of lyric lines
grace_notes.setParseAction (doGrace)
acciaccatura.setParseAction (lambda t: pObj ('accia', t))
note.setParseAction (noteActn)
rest.setParseAction (restActn)
decorations.setParseAction (lambda t: pObj ('deco', t))
pizzicato.setParseAction (lambda t: ['!plus!']) # translate !+!
slur_ends.setParseAction (lambda t: pObj ('slurs', t))
chord.setParseAction (lambda t: pObj ('chord', t, 1))
dec_note.setParseAction (noteActn)
tie.setParseAction (lambda t: pObj ('tie', t))
pitch.setParseAction (lambda t: pObj ('pitch', t))
bare_volta.setParseAction (lambda t: ['|']) # return barline that user forgot
dashed_barline.setParseAction (lambda t: ['.|'])
bar_right.setParseAction (lambda t: pObj ('rbar', t))
bar_left.setParseAction (lambda t: pObj ('lbar', t))
broken.setParseAction (lambda t: pObj ('broken', t))
tuplet_start.setParseAction (lambda t: pObj ('tup', t))
linebreak.setParseAction (lambda t: pObj ('linebrk', t))
measure.setParseAction (doMaat)
noBarMeasure.setParseAction (doMaat)
b1.setParseAction (errorWarn)
b2.setParseAction (errorWarn)
b3.setParseAction (errorWarn)
errors.setParseAction (errorWarn)
return abc_header, abc_voice, abc_scoredef, abc_percmap
class pObj (object): # every relevant parse result is converted into a pObj
def __init__ (s, name, t, seq=0): # t = list of nested parse results
s.name = name # name uniqueliy identifies this pObj
rest = [] # collect parse results that are not a pObj
attrs = {} # new attributes
for x in t: # nested pObj's become attributes of this pObj
if type (x) == pObj:
attrs [x.name] = attrs.get (x.name, []) + [x]
else:
rest.append (x) # collect non-pObj's (mostly literals)
for name, xs in attrs.items ():
if len (xs) == 1: xs = xs[0] # only list if more then one pObj
setattr (s, name, xs) # create the new attributes
s.t = rest # all nested non-pObj's (mostly literals)
s.objs = seq and t or [] # for nested ordered (lyric) pObj's
def __repr__ (s): # make a nice string representation of a pObj
r = []
for nm in dir (s):
if nm.startswith ('_'): continue # skip build in attributes
elif nm == 'name': continue # redundant
else:
x = getattr (s, nm)
if not x: continue # s.t may be empty (list of non-pObj's)
if type (x) == list_type: r.extend (x)
else: r.append (x)
xs = []
for x in r: # recursively call __repr__ and convert all strings to latin-1
if isinstance (x, str_type): xs.append (x) # string -> no recursion
else: xs.append (repr (x)) # pObj -> recursive call
return '(' + s.name + ' ' +','.join (xs) + ')'
global prevloc # global to remember previous match position of a note/rest
prevloc = 0
def detectBeamBreak (line, loc, t):
global prevloc # location in string 'line' of previous note match
xs = line[prevloc:loc+1] # string between previous and current note match
xs = xs.lstrip () # first note match starts on a space!
prevloc = loc # location in string 'line' of current note match
b = pObj ('bbrk', [' ' in xs]) # space somewhere between two notes -> beambreak
t.insert (0, b) # insert beambreak as a nested parse result
def noteActn (line, loc, t): # detect beambreak between previous and current note/rest
if 'y' in t[0].t: return [] # discard spacer
detectBeamBreak (line, loc, t) # adds beambreak to parse result t as side effect
return pObj ('note', t)
def restActn (line, loc, t): # detect beambreak between previous and current note/rest
detectBeamBreak (line, loc, t) # adds beambreak to parse result t as side effect
return pObj ('rest', t)
def errorWarn (line, loc, t): # warning for misplaced symbols and skip them
if not t[0]: return [] # only warn if catched string not empty
info ('**misplaced symbol: %s' % t[0], warn=0)
lineCopy = line [:]
if loc > 40:
lineCopy = line [loc - 40: loc + 40]
loc = 40
info (lineCopy.replace ('\n', ' '), warn=0)
info (loc * '-' + '^', warn=0)
return []
#-------------------------------------------------------------
# transformations of a measure (called by parse action doMaat)
#-------------------------------------------------------------
def simplify (a, b): # divide a and b by their greatest common divisor
x, y = a, b
while b: a, b = b, a % b
return x // a, y // a
def doBroken (prev, brk, x):
if not prev: info ('error in broken rhythm: %s' % x); return # no changes
nom1, den1 = prev.dur.t # duration of first note/chord
nom2, den2 = x.dur.t # duration of second note/chord
if brk == '>':
nom1, den1 = simplify (3 * nom1, 2 * den1)
nom2, den2 = simplify (1 * nom2, 2 * den2)
elif brk == '<':
nom1, den1 = simplify (1 * nom1, 2 * den1)
nom2, den2 = simplify (3 * nom2, 2 * den2)
elif brk == '>>':
nom1, den1 = simplify (7 * nom1, 4 * den1)
nom2, den2 = simplify (1 * nom2, 4 * den2)
elif brk == '<<':
nom1, den1 = simplify (1 * nom1, 4 * den1)
nom2, den2 = simplify (7 * nom2, 4 * den2)
else: return # give up
prev.dur.t = nom1, den1 # change duration of previous note/chord
x.dur.t = nom2, den2 # and current note/chord
def convertBroken (t): # convert broken rhythms to normal note durations
prev = None # the last note/chord before the broken symbol
brk = '' # the broken symbol
remove = [] # indexes to broken symbols (to be deleted) in measure
for i, x in enumerate (t): # scan all elements in measure
if x.name == 'note' or x.name == 'chord' or x.name == 'rest':
if brk: # a broken symbol was encountered before
doBroken (prev, brk, x) # change duration previous note/chord/rest and current one
brk = ''
else:
prev = x # remember the last note/chord/rest
elif x.name == 'broken':
brk = x.t[0] # remember the broken symbol (=string)
remove.insert (0, i) # and its index, highest index first
for i in remove: del t[i] # delete broken symbols from high to low
def ptc2midi (n): # convert parsed pitch attribute to a midi number
pt = getattr (n, 'pitch', '')
if pt:
p = pt.t
if len (p) == 3: acc, step, oct = p
else: acc = ''; step, oct = p
nUp = step.upper ()
oct = (4 if nUp == step else 5) + int (oct)
midi = oct * 12 + [0,2,4,5,7,9,11]['CDEFGAB'.index (nUp)] + {'^':1,'_':-1}.get (acc, 0) + 12
else: midi = 130 # all non pitch objects first
return midi
def convertChord (t): # convert chord to sequence of notes in musicXml-style
ins = []
for i, x in enumerate (t):
if x.name == 'chord':
if hasattr (x, 'rest') and not hasattr (x, 'note'): # chords containing only rests
if type (x.rest) == list_type: x.rest = x.rest[0] # more rests == one rest
ins.insert (0, (i, [x.rest])) # just output a single rest, no chord
continue
num1, den1 = x.dur.t # chord duration
tie = getattr (x, 'tie', None) # chord tie
slurs = getattr (x, 'slurs', []) # slur endings
if type (x.note) != list_type: x.note = [x.note] # when chord has only one note ...
elms = []; j = 0 # sort chord notes, highest first
nss = sorted (x.objs, key = ptc2midi, reverse=1) if mxm.orderChords else x.objs
for nt in nss: # all chord elements (note | decorations | rest | grace note)
if nt.name == 'note':
num2, den2 = nt.dur.t # note duration * chord duration
nt.dur.t = simplify (num1 * num2, den1 * den2)
if tie: nt.tie = tie # tie on all chord notes
if j == 0 and slurs: nt.slurs = slurs # slur endings only on first chord note
if j > 0: nt.chord = pObj ('chord', [1]) # label all but first as chord notes
else: # remember all pitches of the chord in the first note
pitches = [n.pitch for n in x.note] # to implement conversion of erroneous ties to slurs
nt.pitches = pObj ('pitches', pitches)
j += 1
if nt.name not in ['dur','tie','slurs','rest']: elms.append (nt)
ins.insert (0, (i, elms)) # chord position, [note|decotation|grace note]
for i, notes in ins: # insert from high to low
for nt in reversed (notes):
t.insert (i+1, nt) # insert chord notes after chord
del t[i] # remove chord itself
def doMaat (t): # t is a Group() result -> the measure is in t[0]
convertBroken (t[0]) # remove all broken rhythms and convert to normal durations
convertChord (t[0]) # replace chords by note sequences in musicXML style
def doGrace (t): # t is a Group() result -> the grace sequence is in t[0]
convertChord (t[0]) # a grace sequence may have chords
for nt in t[0]: # flag all notes within the grace sequence
if nt.name == 'note': nt.grace = 1 # set grace attribute
return t[0] # ungroup the parse result
#--------------------
# musicXML generation
#----------------------------------
def compChordTab (): # avoid some typing work: returns mapping constant {ABC chordsyms -> musicXML kind}
maj, min, aug, dim, dom, ch7, ch6, ch9, ch11, ch13, hd = 'major minor augmented diminished dominant -seventh -sixth -ninth -11th -13th half-diminished'.split ()
triad = zip ('ma Maj maj M mi min m aug dim o + -'.split (), [maj, maj, maj, maj, min, min, min, aug, dim, dim, aug, min])
seventh = zip ('7 ma7 Maj7 M7 maj7 mi7 min7 m7 dim7 o7 -7 aug7 +7 m7b5 mi7b5'.split (),
[dom, maj+ch7, maj+ch7, maj+ch7, maj+ch7, min+ch7, min+ch7, min+ch7, dim+ch7, dim+ch7, min+ch7, aug+ch7, aug+ch7, hd, hd])
sixth = zip ('6 ma6 M6 mi6 min6 m6'.split (), [maj+ch6, maj+ch6, maj+ch6, min+ch6, min+ch6, min+ch6])
ninth = zip ('9 ma9 M9 maj9 Maj9 mi9 min9 m9'.split (), [dom+ch9, maj+ch9, maj+ch9, maj+ch9, maj+ch9, min+ch9, min+ch9, min+ch9])
elevn = zip ('11 ma11 M11 maj11 Maj11 mi11 min11 m11'.split (), [dom+ch11, maj+ch11, maj+ch11, maj+ch11, maj+ch11, min+ch11, min+ch11, min+ch11])
thirt = zip ('13 ma13 M13 maj13 Maj13 mi13 min13 m13'.split (), [dom+ch13, maj+ch13, maj+ch13, maj+ch13, maj+ch13, min+ch13, min+ch13, min+ch13])
sus = zip ('sus sus4 sus2'.split (), ['suspended-fourth', 'suspended-fourth', 'suspended-second'])
return dict (list (triad) + list (seventh) + list (sixth) + list (ninth) + list (elevn) + list (thirt) + list (sus))
def addElem (parent, child, level):
indent = 2
chldrn = list (parent)
if chldrn:
chldrn[-1].tail += indent * ' '
else:
parent.text = '\n' + level * indent * ' '
parent.append (child)
child.tail = '\n' + (level-1) * indent * ' '
def addElemT (parent, tag, text, level):
e = E.Element (tag)
e.text = text
addElem (parent, e, level)
return e
def mkTmod (tmnum, tmden, lev):
tmod = E.Element ('time-modification')
addElemT (tmod, 'actual-notes', str (tmnum), lev + 1)
addElemT (tmod, 'normal-notes', str (tmden), lev + 1)
return tmod
def addDirection (parent, elems, lev, gstaff, subelms=[], placement='below', cue_on=0):
dir = E.Element ('direction', placement=placement)
addElem (parent, dir, lev)
if type (elems) != list_type: elems = [(elems, subelms)] # ugly hack to provide for multiple direction types
for elem, subelms in elems: # add direction types
typ = E.Element ('direction-type')
addElem (dir, typ, lev + 1)
addElem (typ, elem, lev + 2)
for subel in subelms: addElem (elem, subel, lev + 3)
if cue_on: addElem (dir, E.Element ('level', size='cue'), lev + 1)
if gstaff: addElemT (dir, 'staff', str (gstaff), lev + 1)
return dir
def removeElems (root_elem, parent_str, elem_str):
for p in root_elem.findall (parent_str):
e = p.find (elem_str)
if e != None: p.remove (e)
def alignLyr (vce, lyrs):
empty_el = pObj ('leeg', '*')
for k, lyr in enumerate (lyrs): # lyr = one full line of lyrics
i = 0 # syl counter
for elem in vce: # reiterate the voice block for each lyrics line
if elem.name == 'note' and not (hasattr (elem, 'chord') or hasattr (elem, 'grace')):
if i >= len (lyr): lr = empty_el
else: lr = lyr [i]
lr.t[0] = lr.t[0].replace ('%5d',']')
elem.objs.append (lr)
if lr.name != 'sbar': i += 1
if elem.name == 'rbar' and i < len (lyr) and lyr[i].name == 'sbar': i += 1
return vce
slur_move = re.compile (r'(?<![!+])([}><][<>]?)(\)+)') # (?<!...) means: not preceeded by ...
mm_rest = re.compile (r'([XZ])(\d+)')
bar_space = re.compile (r'([:|][ |\[\]]+[:|])') # barlines with spaces
def fixSlurs (x): # repair slurs when after broken sign or grace-close
def f (mo): # replace a multi-measure rest by single measure rests
n = int (mo.group (2))
return (n * (mo.group (1) + '|')) [:-1]
def g (mo): # squash spaces in barline expressions
return mo.group (1).replace (' ','')
x = mm_rest.sub (f, x)
x = bar_space.sub (g, x)
return slur_move.sub (r'\2\1', x)
def splitHeaderVoices (abctext):
escField = lambda x: '[' + x.replace (']',r'%5d') + ']' # hope nobody uses %5d in a field
r1 = re.compile (r'%.*$') # comments
r2 = re.compile (r'^([A-Zw]:.*$)|\[[A-Zw]:[^]]*]$') # information field, including lyrics
r3 = re.compile (r'^%%(?=[^%])') # directive: ^%% folowed by not a %
xs, nx, mcont, fcont = [], 0, 0, 0 # result lines, X-encountered, music continuation, field continuation
mln = fln = '' # music line, field line
for x in abctext.splitlines ():
x = x.strip ()
if not x and nx == 1: break # end of tune (empty line)
if x.startswith ('X:'):
if nx == 1: break # second tune starts without an empty line !!
nx = 1 # start first tune
x = r3.sub ('I:', x) # replace %% -> I:
x2 = r1.sub ('', x) # remove comment
while x2.endswith ('*') and not (x2.startswith ('w:') or x2.startswith ('+:') or 'percmap' in x2):
x2 = x2[:-1] # remove old syntax for right adjusting
if not x2: continue # empty line
if x2[:2] == 'W:':
field = x2 [2:].strip ()
ftype = mxm.metaMap.get ('W', 'W') # respect the (user defined --meta) mapping of various ABC fields to XML meta data types
c = mxm.metadata.get (ftype, '')
mxm.metadata [ftype] = c + '\n' + field if c else field # concatenate multiple info fields with new line as separator
continue # skip W: lyrics
if x2[:2] == '+:': # field continuation
fln += x2[2:]
continue
ro = r2.match (x2) # single field on a line
if ro: # field -> inline_field, escape all ']'
if fcont: # old style \-info-continuation active
fcont = x2 [-1] == '\\' # possible further \-info-continuation
fln += re.sub (r'^.:(.*?)\\*$', r'\1', x2) # add continuation, remove .: and \
continue
if fln: mln += escField (fln)
if x2.startswith ('['): x2 = x2.strip ('[]')
fcont = x2 [-1] == '\\' # first encounter of old style \-info-continuation
fln = x2.rstrip ('\\') # remove continuation from field and inline brackets
continue
if nx == 1: # x2 is a new music line
fcont = 0 # stop \-continuations (-> only adjacent \-info-continuations are joined)
if fln:
mln += escField (fln)
fln = ''
if mcont:
mcont = x2 [-1] == '\\'
mln += x2.rstrip ('\\')
else:
if mln: xs.append (mln); mln = ''
mcont = x2 [-1] == '\\'
mln = x2.rstrip ('\\')
if not mcont: xs.append (mln); mln = ''
if fln: mln += escField (fln)
if mln: xs.append (mln)
hs = re.split (r'(\[K:[^]]*\])', xs [0]) # look for end of header K:
if len (hs) == 1: header = hs[0]; xs [0] = '' # no K: present
else: header = hs [0] + hs [1]; xs [0] = ''.join (hs[2:]) # h[1] is the first K:
abctext = '\n'.join (xs) # the rest is body text
hfs, vfs = [], []
for x in header[1:-1].split (']['):
if x[0] == 'V': vfs.append (x) # filter voice- and midi-definitions
elif x[:6] == 'I:MIDI': vfs.append (x) # from the header to vfs
elif x[:9] == 'I:percmap': vfs.append (x) # and also percmap
else: hfs.append (x) # all other fields stay in header
header = '[' + ']['.join (hfs) + ']' # restore the header
abctext = ('[' + ']['.join (vfs) + ']' if vfs else '') + abctext # prepend voice/midi from header before abctext
xs = abctext.split ('[V:')
if len (xs) == 1: abctext = '[V:1]' + abctext # abc has no voice defs at all
elif re.sub (r'\[[A-Z]:[^]]*\]', '', xs[0]).strip (): # remove inline fields from starting text, if any
abctext = '[V:1]' + abctext # abc with voices has no V: at start
r1 = re.compile (r'\[V:\s*(\S*)[ \]]') # get voice id from V: field (skip spaces betwee V: and ID)
vmap = {} # {voice id -> [voice abc string]}
vorder = {} # mark document order of voices
xs = re.split (r'(\[V:[^]]*\])', abctext) # split on every V-field (V-fields included in split result list)
if len (xs) == 1: raise ValueError ('bugs ...')
else:
pm = re.findall (r'\[P:.\]', xs[0]) # all P:-marks after K: but before first V:
if pm: xs[2] = ''.join (pm) + xs[2] # prepend P:-marks to the text of the first voice
header += re.sub (r'\[P:.\]', '', xs[0]) # clear all P:-marks from text between K: and first V: and put text in the header
i = 1
while i < len (xs): # xs = ['', V-field, voice abc, V-field, voice abc, ...]
vce, abc = xs[i:i+2]
id = r1.search (vce).group (1) # get voice ID from V-field
if not id: id, vce = '1', '[V:1]' # voice def has no ID
vmap[id] = vmap.get (id, []) + [vce, abc] # collect abc-text for each voice id (include V-fields)
if id not in vorder: vorder [id] = i # store document order of first occurrence of voice id
i += 2
voices = []
ixs = sorted ([(i, id) for id, i in vorder.items ()]) # restore document order of voices
for i, id in ixs:
voice = ''.join (vmap [id]) # all abc of one voice
voice = fixSlurs (voice) # put slurs right after the notes
voices.append ((id, voice))
return header, voices
def mergeMeasure (m1, m2, slur_offset, voice_offset, rOpt, is_grand=0, is_overlay=0):
slurs = m2.findall ('note/notations/slur')
for slr in slurs:
slrnum = int (slr.get ('number')) + slur_offset
slr.set ('number', str (slrnum)) # make unique slurnums in m2
vs = m2.findall ('note/voice') # set all voice number elements in m2
for v in vs: v.text = str (voice_offset + int (v.text))
ls = m1.findall ('note/lyric') # all lyric elements in m1
lnum_max = max ([int (l.get ('number')) for l in ls] + [0]) # highest lyric number in m1
ls = m2.findall ('note/lyric') # update lyric elements in m2
for el in ls:
n = int (el.get ('number'))
el.set ('number', str (n + lnum_max))
ns = m1.findall ('note') # determine the total duration of m1, subtract all backups
dur1 = sum (int (n.find ('duration').text) for n in ns
if n.find ('grace') == None and n.find ('chord') == None)
dur1 -= sum (int (b.text) for b in m1.findall ('backup/duration'))
repbar, nns, es = 0, 0, [] # nns = number of real notes in m2
for e in list (m2): # scan all elements of m2
if e.tag == 'attributes':
if not is_grand: continue # no attribute merging for normal voices
else: nns += 1 # but we do merge (clef) attributes for a grand staff
if e.tag == 'print': continue
if e.tag == 'note' and (rOpt or e.find ('rest') == None): nns += 1
if e.tag == 'barline' and e.find ('repeat') != None: repbar = e;
es.append (e) # buffer elements to be merged
if nns > 0: # only merge if m2 contains any real notes
if dur1 > 0: # only insert backup if duration of m1 > 0
b = E.Element ('backup')
addElem (m1, b, level=3)
addElemT (b, 'duration', str (dur1), level=4)
for e in es: addElem (m1, e, level=3) # merge buffered elements of m2
elif is_overlay and repbar: addElem (m1, repbar, level=3) # merge repeat in empty overlay
def mergePartList (parts, rOpt, is_grand=0): # merge parts, make grand staff when is_grand true
def delAttrs (part): # for the time being we only keep clef attributes
xs = [(m, e) for m in part.findall ('measure') for e in m.findall ('attributes')]
for m, e in xs:
for c in list (e):
if c.tag == 'clef': continue # keep clef attribute
if c.tag == 'staff-details': continue # keep staff-details attribute
e.remove (c) # delete all other attrinutes for higher staff numbers
if len (list (e)) == 0: m.remove (e) # remove empty attributes element
p1 = parts[0]
for p2 in parts[1:]:
if is_grand: delAttrs (p2) # delete all attributes except clef
for i in range (len (p1) + 1, len (p2) + 1): # second part longer than first one
maat = E.Element ('measure', number = str(i)) # append empty measures
addElem (p1, maat, 2)
slurs = p1.findall ('measure/note/notations/slur') # find highest slur num in first part
slur_max = max ([int (slr.get ('number')) for slr in slurs] + [0])
vs = p1.findall ('measure/note/voice') # all voice number elements in first part
vnum_max = max ([int (v.text) for v in vs] + [0]) # highest voice number in first part
for im, m2 in enumerate (p2.findall ('measure')): # merge all measures of p2 into p1
mergeMeasure (p1[im], m2, slur_max, vnum_max, rOpt, is_grand) # may change slur numbers in p1
return p1
def mergeParts (parts, vids, staves, rOpt, is_grand=0):
if not staves: return parts, vids # no voice mapping
partsnew, vidsnew = [], []
for voice_ids in staves:
pixs = []
for vid in voice_ids:
if vid in vids: pixs.append (vids.index (vid))
else: info ('score partname %s does not exist' % vid)
if pixs:
xparts = [parts[pix] for pix in pixs]
if len (xparts) > 1: mergedpart = mergePartList (xparts, rOpt, is_grand)
else: mergedpart = xparts [0]
partsnew.append (mergedpart)
vidsnew.append (vids [pixs[0]])
return partsnew, vidsnew
def mergePartMeasure (part, msre, ovrlaynum, rOpt): # merge msre into last measure of part, only for overlays
slur_offset = 0; # slur numbers determined by the slurstack size (as in a single voice)
last_msre = list (part)[-1] # last measure in part
mergeMeasure (last_msre, msre, slur_offset, ovrlaynum, rOpt, is_overlay=1) # voice offset = s.overlayVNum
def pushSlur (boogStapel, stem):
if stem not in boogStapel: boogStapel [stem] = [] # initialize slurstack for stem
boognum = sum (map (len, boogStapel.values ())) + 1 # number of open slurs in all (overlay) voices
boogStapel [stem].append (boognum)
return boognum
def setFristVoiceNameFromGroup (vids, vdefs): # vids = [vid], vdef = {vid -> (name, subname, voicedef)}
vids = [v for v in vids if v in vdefs] # only consider defined voices
if not vids: return vdefs
vid0 = vids [0] # first vid of the group
_, _, vdef0 = vdefs [vid0] # keep de voice definition (vdef0) when renaming vid0
for vid in vids:
nm, snm, vdef = vdefs [vid]
if nm: # first non empty name encountered will become
vdefs [vid0] = nm, snm, vdef0 # name of merged group == name of first voice in group (vid0)
break
return vdefs
def mkGrand (p, vdefs): # transform parse subtree into list needed for s.grands
xs = []
for i, x in enumerate (p.objs): # changing p.objs [i] alters the tree. changing x has no effect on the tree.
if type (x) == pObj:
us = mkGrand (x, vdefs) # first get transformation results of current pObj
if x.name == 'grand': # x.objs contains ordered list of nested parse results within x
vids = [y.objs[0] for y in x.objs[1:]] # the voice ids in the grand staff
nms = [vdefs [u][0] for u in vids if u in vdefs] # the names of those voices
accept = sum ([1 for nm in nms if nm]) == 1 # accept as grand staff when only one of the voices has a name
if accept or us[0] == '{*':
xs.append (us[1:]) # append voice ids as a list (discard first item '{' or '{*')
vdefs = setFristVoiceNameFromGroup (vids, vdefs)
p.objs [i] = x.objs[1] # replace voices by first one in the grand group (this modifies the parse tree)
else:
xs.extend (us[1:]) # extend current result with all voice ids of rejected grand staff
else: xs.extend (us) # extend current result with transformed pObj
else: xs.append (p.t[0]) # append the non pObj (== voice id string)
return xs
def mkStaves (p, vdefs): # transform parse tree into list needed for s.staves
xs = []
for i, x in enumerate (p.objs): # structure and comments identical to mkGrand
if type (x) == pObj:
us = mkStaves (x, vdefs)
if x.name == 'voicegr':
xs.append (us)
vids = [y.objs[0] for y in x.objs]
vdefs = setFristVoiceNameFromGroup (vids, vdefs)
p.objs [i] = x.objs[0]
else:
xs.extend (us)
else:
if p.t[0] not in '{*': xs.append (p.t[0])
return xs
def mkGroups (p): # transform parse tree into list needed for s.groups
xs = []
for x in p.objs:
if type (x) == pObj:
if x.name == 'vid': xs.extend (mkGroups (x))
elif x.name == 'bracketgr': xs.extend (['['] + mkGroups (x) + [']'])
elif x.name == 'bracegr': xs.extend (['{'] + mkGroups (x) + ['}'])
else: xs.extend (mkGroups (x) + ['}']) # x.name == 'grand' == rejected grand staff
else:
xs.append (p.t[0])
return xs
def stepTrans (step, soct, clef): # [A-G] (1...8)
if clef.startswith ('bass'):
nm7 = 'C,D,E,F,G,A,B'.split (',')
n = 14 + nm7.index (step) - 12 # two octaves extra to avoid negative numbers
step, soct = nm7 [n % 7], soct + n // 7 - 2 # subtract two octaves again
return step, soct
def reduceMids (parts, vidsnew, midiInst): # remove redundant instruments from a part
for pid, part in zip (vidsnew, parts):
mids, repls, has_perc = {}, {}, 0
for ipid, ivid, ch, prg, vol, pan in sorted (list (midiInst.values ())):
if ipid != pid: continue # only instruments from part pid
if ch == '10': has_perc = 1; continue # only consider non percussion instruments
instId, inst = 'I%s-%s' % (ipid, ivid), (ch, prg)
if inst in mids: # midi instrument already defined in this part
repls [instId] = mids [inst] # remember to replace instId by inst (see below)
del midiInst [instId] # instId is redundant
else: mids [inst] = instId # collect unique instruments in this part
if len (mids) < 2 and not has_perc: # only one instrument used -> no instrument tags needed in notes
removeElems (part, 'measure/note', 'instrument') # no instrument tag needed for one- or no-instrument parts
else:
for e in part.findall ('measure/note/instrument'):
id = e.get ('id') # replace all redundant instrument Id's
if id in repls: e.set ('id', repls [id])
class stringAlloc:
def __init__ (s):
s.snaarVrij = [] # [[(t1, t2) ...] for each string ]
s.snaarIx = [] # index in snaarVrij for each string
s.curstaff = -1 # staff being allocated
def beginZoek (s): # reset snaarIx at start of each voice
s.snaarIx = []
for i in range (len (s.snaarVrij)): s.snaarIx.append (0)
def setlines (s, stflines, stfnum):
if stfnum != s.curstaff: # initialize for new staff
s.curstaff = stfnum
s.snaarVrij = []
for i in range (stflines): s.snaarVrij.append ([])
s.beginZoek ()
def isVrij (s, snaar, t1, t2): # see if string snaar is free between t1 and t2
xs = s.snaarVrij [snaar]
for i in range (s.snaarIx [snaar], len (xs)):
tb, te = xs [i]
if t1 >= te: continue # te_prev < t1 <= te
if t1 >= tb: s.snaarIx [snaar] = i; return 0 # tb <= t1 < te
if t2 > tb: s.snaarIx [snaar] = i; return 0 # t1 < tb < t2
s.snaarIx [snaar] = i; # remember position for next call
xs.insert (i, (t1,t2)) # te_prev < t1 < t2 < tb
return 1
xs.append ((t1,t2))
s.snaarIx [snaar] = len (xs) - 1
return 1
def bezet (s, snaar, t1, t2): # force allocation of note (t1,t2) on string snaar
xs = s.snaarVrij [snaar]
for i, (tb, te) in enumerate (xs):
if t1 >= te: continue # te_prev < t1 <= te
xs.insert (i, (t1, t2))
return
xs.append ((t1,t2))
class MusicXml:
typeMap = {1:'long', 2:'breve', 4:'whole', 8:'half', 16:'quarter', 32:'eighth', 64:'16th', 128:'32nd', 256:'64th'}
dynaMap = {'p':1,'pp':1,'ppp':1,'pppp':1,'f':1,'ff':1,'fff':1,'ffff':1,'mp':1,'mf':1,'sfz':1}
tempoMap = {'larghissimo':40, 'moderato':104, 'adagissimo':44, 'allegretto':112, 'lentissimo':48, 'allegro':120, 'largo':56,
'vivace':168, 'adagio':59, 'vivo':180, 'lento':62, 'presto':192, 'larghetto':66, 'allegrissimo':208, 'adagietto':76,
'vivacissimo':220, 'andante':88, 'prestissimo':240, 'andantino':96}
wedgeMap = {'>(':1, '>)':1, '<(':1,'<)':1,'crescendo(':1,'crescendo)':1,'diminuendo(':1,'diminuendo)':1}
artMap = {'.':'staccato','>':'accent','accent':'accent','wedge':'staccatissimo','tenuto':'tenuto',
'breath':'breath-mark','marcato':'strong-accent','^':'strong-accent','slide':'scoop'}
ornMap = {'trill':'trill-mark','T':'trill-mark','turn':'turn','uppermordent':'inverted-mordent','lowermordent':'mordent',
'pralltriller':'inverted-mordent','mordent':'mordent','turn':'turn','invertedturn':'inverted-turn'}
tecMap = {'upbow':'up-bow', 'downbow':'down-bow', 'plus':'stopped','open':'open-string','snap':'snap-pizzicato',
'thumb':'thumb-position'}
capoMap = {'fine':('Fine','fine','yes'), 'D.S.':('D.S.','dalsegno','segno'), 'D.C.':('D.C.','dacapo','yes'),'dacapo':('D.C.','dacapo','yes'),
'dacoda':('To Coda','tocoda','coda'), 'coda':('coda','coda','coda'), 'segno':('segno','segno','segno')}
sharpness = ['Fb', 'Cb','Gb','Db','Ab','Eb','Bb','F','C','G','D','A', 'E', 'B', 'F#','C#','G#','D#','A#','E#','B#']
offTab = {'maj':8, 'm':11, 'min':11, 'mix':9, 'dor':10, 'phr':12, 'lyd':7, 'loc':13}
modTab = {'maj':'major', 'm':'minor', 'min':'minor', 'mix':'mixolydian', 'dor':'dorian', 'phr':'phrygian', 'lyd':'lydian', 'loc':'locrian'}
clefMap = { 'alto1':('C','1'), 'alto2':('C','2'), 'alto':('C','3'), 'alto4':('C','4'), 'tenor':('C','4'),
'bass3':('F','3'), 'bass':('F','4'), 'treble':('G','2'), 'perc':('percussion',''), 'none':('',''), 'tab':('TAB','5')}
clefLineMap = {'B':'treble', 'G':'alto1', 'E':'alto2', 'C':'alto', 'A':'tenor', 'F':'bass3', 'D':'bass'}
alterTab = {'=':'0', '_':'-1', '__':'-2', '^':'1', '^^':'2'}
accTab = {'=':'natural', '_':'flat', '__':'flat-flat', '^':'sharp', '^^':'sharp-sharp'}
chordTab = compChordTab ()
uSyms = {'~':'roll', 'H':'fermata','L':'>','M':'lowermordent','O':'coda',
'P':'uppermordent','S':'segno','T':'trill','u':'upbow','v':'downbow'}
pageFmtDef = [0.75,297,210,18,18,10,10] # the abcm2ps page formatting defaults for A4
metaTab = {'O':'origin', 'A':'area', 'Z':'transcription', 'N':'notes', 'G':'group', 'H':'history', 'R':'rhythm',
'B':'book', 'D':'discography', 'F':'fileurl', 'S':'source', 'P':'partmap', 'W':'lyrics'}
metaMap = {'C':'composer'} # mapping of composer is fixed
metaTypes = {'composer':1,'lyricist':1,'poet':1,'arranger':1,'translator':1, 'rights':1} # valid MusicXML meta data types
tuningDef = 'E2,A2,D3,G3,B3,E4'.split (',') # default string tuning (guitar)
def __init__ (s):
s.pageFmtCmd = [] # set by command line option -p
s.reset ()
def reset (s, fOpt=False):
s.divisions = 2520 # xml duration of 1/4 note, 2^3 * 3^2 * 5 * 7 => 5,7,9 tuplets
s.ties = {} # {abc pitch tuple -> alteration} for all open ties
s.slurstack = {} # stack of open slur numbers per (overlay) voice
s.slurbeg = [] # type of slurs to start (when slurs are detected at element-level)
s.tmnum = 0 # time modification, numerator
s.tmden = 0 # time modification, denominator
s.ntup = 0 # number of tuplet notes remaining
s.trem = 0 # number of bars for tremolo
s.intrem = 0 # mark tremolo sequence (for duration doubling)
s.tupnts = [] # all tuplet modifiers with corresp. durations: [(duration, modifier), ...]
s.irrtup = 0 # 1 if an irregular tuplet
s.ntype = '' # the normal-type of a tuplet (== duration type of a normal tuplet note)
s.unitL = (1, 8) # default unit length
s.unitLcur = (1, 8) # unit length of current voice
s.keyAlts = {} # alterations implied by key
s.msreAlts = {} # temporarily alterations
s.curVolta = '' # open volta bracket
s.title = '' # title of music
s.creator = {} # {creator-type -> creator string}
s.metadata = {} # {metadata-type -> string}
s.lyrdash = {} # {lyric number -> 1 if dash between syllables}
s.usrSyms = s.uSyms # user defined symbols
s.prevNote = None # xml element of previous beamed note to correct beams (start, continue)
s.prevLyric = {} # xml element of previous lyric to add/correct extend type (start, continue)
s.grcbbrk = False # remember any bbrk in a grace sequence
s.linebrk = 0 # 1 if next measure should start with a line break
s.nextdecos = [] # decorations for the next note
s.prevmsre = None # the previous measure
s.supports_tag = 0 # issue supports-tag in xml file when abc uses explicit linebreaks
s.staveDefs = [] # collected %%staves or %%score instructions from score
s.staves = [] # staves = [[voice names to be merged into one stave]]
s.groups = [] # list of merged part names with interspersed {[ and }]
s.grands = [] # [[vid1, vid2, ..], ...] voiceIds to be merged in a grand staff
s.gStaffNums = {} # map each voice id in a grand staff to a staff number
s.gNstaves = {} # map each voice id in a grand staff to total number of staves
s.pageFmtAbc = [] # formatting from abc directives
s.mdur = (4,4) # duration of one measure
s.gtrans = 0 # octave transposition (by clef)
s.midprg = ['', '', '', ''] # MIDI channel nr, program nr, volume, panning for the current part
s.vid = '' # abc voice id for the current voice
s.pid = '' # xml part id for the current voice
s.gcue_on = 0 # insert <cue/> tag in each note
s.percVoice = 0 # 1 if percussion enabled
s.percMap = {} # (part-id, abc_pitch, xml-octave) -> (abc staff step, midi note number, xml notehead)
s.pMapFound = 0 # at least one I:percmap has been found
s.vcepid = {} # voice_id -> part_id
s.midiInst = {} # inst_id -> (part_id, voice_id, channel, midi_number), remember instruments used
s.capo = 0 # fret position of the capodastro
s.tunmid = [] # midi numbers of strings
s.tunTup = [] # ordered midi numbers of strings [(midi_num, string_num), ...] (midi_num from high to low)
s.fOpt = fOpt # force string/fret allocations for tab staves
s.orderChords = 0 # order notes in a chord
s.chordDecos = {} # decos that should be distributed to all chord notes for xml
ch10 = 'acoustic-bass-drum,35;bass-drum-1,36;side-stick,37;acoustic-snare,38;hand-clap,39;electric-snare,40;low-floor-tom,41;closed-hi-hat,42;high-floor-tom,43;pedal-hi-hat,44;low-tom,45;open-hi-hat,46;low-mid-tom,47;hi-mid-tom,48;crash-cymbal-1,49;high-tom,50;ride-cymbal-1,51;chinese-cymbal,52;ride-bell,53;tambourine,54;splash-cymbal,55;cowbell,56;crash-cymbal-2,57;vibraslap,58;ride-cymbal-2,59;hi-bongo,60;low-bongo,61;mute-hi-conga,62;open-hi-conga,63;low-conga,64;high-timbale,65;low-timbale,66;high-agogo,67;low-agogo,68;cabasa,69;maracas,70;short-whistle,71;long-whistle,72;short-guiro,73;long-guiro,74;claves,75;hi-wood-block,76;low-wood-block,77;mute-cuica,78;open-cuica,79;mute-triangle,80;open-triangle,81'
s.percsnd = [x.split (',') for x in ch10.split (';')] # {name -> midi number} of standard channel 10 sound names
s.gTime = (0,0) # (XML begin time, XML end time) in divisions
s.tabStaff = '' # == pid (part ID) for a tab staff
def mkPitch (s, acc, note, oct, lev):
if s.percVoice: # percussion map switched off by perc=off (see doClef)
octq = int (oct) + s.gtrans # honour the octave= transposition when querying percmap
tup = s.percMap.get ((s.pid, acc+note, octq), s.percMap.get (('', acc+note, octq), 0))
if tup: step, soct, midi, notehead = tup
else: step, soct = note, octq
octnum = (4 if step.upper() == step else 5) + int (soct)
if not tup: # add percussion map for unmapped notes in this part
midi = str (octnum * 12 + [0,2,4,5,7,9,11]['CDEFGAB'.index (step.upper())] + {'^':1,'_':-1}.get (acc, 0) + 12)
notehead = {'^':'x', '_':'circle-x'}.get (acc, 'normal')
if s.pMapFound: info ('no I:percmap for: %s%s in part %s, voice %s' % (acc+note, -oct*',' if oct<0 else oct*"'", s.pid, s.vid))
s.percMap [(s.pid, acc+note, octq)] = (note, octq, midi, notehead)
else: # correct step value for clef
step, octnum = stepTrans (step.upper (), octnum, s.curClef)
pitch = E.Element ('unpitched')
addElemT (pitch, 'display-step', step.upper (), lev + 1)
addElemT (pitch, 'display-octave', str (octnum), lev + 1)
return pitch, '', midi, notehead
nUp = note.upper ()
octnum = (4 if nUp == note else 5) + int (oct) + s.gtrans
pitch = E.Element ('pitch')
addElemT (pitch, 'step', nUp, lev + 1)
alter = ''
if (note, oct) in s.ties:
tied_alter, _, vnum, _ = s.ties [(note,oct)] # vnum = overlay voice number when tie started
if vnum == s.overlayVnum: alter = tied_alter # tied note in the same overlay -> same alteration
elif acc:
s.msreAlts [(nUp, octnum)] = s.alterTab [acc]
alter = s.alterTab [acc] # explicit notated alteration
elif (nUp, octnum) in s.msreAlts: alter = s.msreAlts [(nUp, octnum)] # temporary alteration
elif nUp in s.keyAlts: alter = s.keyAlts [nUp] # alteration implied by the key
if alter: addElemT (pitch, 'alter', alter, lev + 1)
addElemT (pitch, 'octave', str (octnum), lev + 1)
return pitch, alter, '', ''
def getNoteDecos (s, n):
decos = s.nextdecos # decorations encountered so far
ndeco = getattr (n, 'deco', 0) # possible decorations of notes of a chord
if ndeco: # add decorations, translate used defined symbols
decos += [s.usrSyms.get (d, d).strip ('!+') for d in ndeco.t]
s.nextdecos = []
if s.tabStaff == s.pid and s.fOpt and n.name != 'rest': # force fret/string allocation if explicit string decoration is missing
if [d for d in decos if d in '0123456789'] == []: decos.append ('0')
return decos
def mkNote (s, n, lev):
isgrace = getattr (n, 'grace', '')
ischord = getattr (n, 'chord', '')
if s.ntup >= 0 and not isgrace and not ischord:
s.ntup -= 1 # count tuplet notes only on non-chord, non grace notes
if s.ntup == -1 and s.trem <= 0:
s.intrem = 0 # tremolo pair ends at first note that is not a new tremolo pair (s.trem > 0)
nnum, nden = n.dur.t # abc dutation of note
if s.intrem: nnum += nnum # double duration of tremolo duplets
if nden == 0: nden = 1 # occurs with illegal ABC like: "A2 1". Now interpreted as A2/1
num, den = simplify (nnum * s.unitLcur[0], nden * s.unitLcur[1]) # normalised with unit length
if den > 64: # limit denominator to 64
num = int (round (64 * float (num) / den)) # scale note to num/64
num, den = simplify (max ([num, 1]), 64) # smallest num == 1
info ('duration too small: rounded to %d/%d' % (num, den))
if n.name == 'rest' and ('Z' in n.t or 'X' in n.t):
num, den = s.mdur # duration of one measure
noMsrRest = not (n.name == 'rest' and (num, den) == s.mdur) # not a measure rest
dvs = (4 * s.divisions * num) // den # divisions is xml-duration of 1/4
rdvs = dvs # real duration (will be 0 for chord/grace)
num, den = simplify (num, den * 4) # scale by 1/4 for s.typeMap
ndot = 0
if num == 3 and noMsrRest: ndot = 1; den = den // 2 # look for dotted notes
if num == 7 and noMsrRest: ndot = 2; den = den // 4
nt = E.Element ('note')
if isgrace: # a grace note (and possibly a chord note)
grace = E.Element ('grace')
if s.acciatura: grace.set ('slash', 'yes'); s.acciatura = 0
addElem (nt, grace, lev + 1)
dvs = rdvs = 0 # no (real) duration for a grace note
if den <= 16: den = 32 # not longer than 1/8 for a grace note
if s.gcue_on: # insert cue tag
cue = E.Element ('cue')
addElem (nt, cue, lev + 1)
if ischord: # a chord note
chord = E.Element ('chord')
addElem (nt, chord, lev + 1)
rdvs = 0 # chord notes no real duration
if den not in s.typeMap: # take the nearest smaller legal duration
info ('illegal duration %d/%d' % (nnum, nden))
den = min (x for x in s.typeMap.keys () if x > den)
xmltype = str (s.typeMap [den]) # xml needs the note type in addition to duration
acc, step, oct = '', 'C', '0' # abc-notated pitch elements (accidental, pitch step, octave)
alter, midi, notehead = '', '', '' # xml alteration
if n.name == 'rest':
if 'x' in n.t or 'X' in n.t: nt.set ('print-object', 'no')
rest = E.Element ('rest')
if not noMsrRest: rest.set ('measure', 'yes')
addElem (nt, rest, lev + 1)
else:
p = n.pitch.t # get pitch elements from parsed tokens
if len (p) == 3: acc, step, oct = p
else: step, oct = p