/usr/lib/python2.7/dist-packages/mmllib/musicxml.py is in python-mmllib 0.3.0.post1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#-
# Copyright © 2016
# mirabilos <m@mirbsd.org>
#
# Provided that these terms and disclaimer and all copyright notices
# are retained or reproduced in an accompanying document, permission
# is granted to deal in this work without restriction, including un‐
# limited rights to use, publicly perform, distribute, sell, modify,
# merge, give away, or sublicence.
#
# This work is provided “AS IS” and WITHOUT WARRANTY of any kind, to
# the utmost extent permitted by applicable law, neither express nor
# implied; without malicious intent or gross negligence. In no event
# may a licensor, author or contributor be held liable for indirect,
# direct, other damage, loss, or other issues arising in any way out
# of dealing in the work, even if advised of the possibility of such
# damage or existence of a defect, except proven that it results out
# of said person’s immediate fault when using the work as intended.
""" Functions to convert an mmllib playlist into a MusicXML document """
from copy import deepcopy
from xml.dom import minidom
try:
from math import gcd
except ImportError:
def gcd(num_a, num_b):
while num_b:
(num_a, num_b) = (num_b, num_a % num_b)
return num_a
from .mml import MML_NOTE2PITCH
from .parser import mml_file, mml_file_meta
## MusicXML note lengths, for display
_MUSICXML_NOTETYPES = {64: u'64th',
32: u'32nd',
16: u'16th',
8: u'eighth',
4: u'quarter',
2: u'half',
1: u'whole'}
def _overridden_play(res, bpm, art, note, length, dots, extra):
""" Overridden function to pass to MML core
This function is supposed to be passed as second argument
to mml_file to collect the detailed data necessary for an
export in the playlist.
Same parameters as mmllib.mml.mml_play.
"""
res.append((bpm, art, length, dots, extra))
def _create_xml_doc(meta, staves):
""" Create a MusicXML document from collected data and metadata
Exports metadata and staves as MusicXML document.
meta - the metadata, as returned by mml_file_meta()
staves - the collected tracks, as returned by mml_file() with _overridden_play
Returns the MusicXML document as MiniDOM document.
"""
# Use deep copies because we change and delete entries
meta = deepcopy(meta)
# create MusicXML document
mdi = minidom.getDOMImplementation('')
doc = mdi.createDocument(None, 'score-partwise',
mdi.createDocumentType('score-partwise',
'-//Recordare//DTD MusicXML 3.0 Partwise//EN',
'http://www.musicxml.org/dtds/partwise.dtd'))
score = doc.documentElement
score.setAttribute('version', '3.0')
# carry over floppi.music-specific metadata
if 'title' in meta:
elem = doc.createElement('movement-title')
elem.appendChild(doc.createTextNode(meta['title']))
score.appendChild(elem)
del meta['title']
tmpel = doc.createElement('identification')
if 'composer' in meta:
elem = doc.createElement('creator')
elem.setAttribute('type', 'composer')
elem.appendChild(doc.createTextNode(meta['composer']))
tmpel.appendChild(elem)
del meta['composer']
if 'lyrics' in meta:
elem = doc.createElement('creator')
elem.setAttribute('type', 'poet')
elem.appendChild(doc.createTextNode(meta['lyrics']))
tmpel.appendChild(elem)
del meta['lyrics']
if 'arranger' in meta:
elem = doc.createElement('creator')
elem.setAttribute('type', 'arranger')
elem.appendChild(doc.createTextNode(meta['arranger']))
tmpel.appendChild(elem)
del meta['arranger']
if 'translator' in meta:
elem = doc.createElement('creator')
elem.setAttribute('type', 'translator')
elem.appendChild(doc.createTextNode(meta['translator']))
tmpel.appendChild(elem)
del meta['arranger']
if 'artist' in meta:
elem = doc.createElement('creator')
elem.appendChild(doc.createTextNode(meta['artist']))
tmpel.appendChild(elem)
del meta['artist']
if 'copyright' in meta:
elem = doc.createElement('rights')
elem.appendChild(doc.createTextNode(meta['copyright']))
tmpel.appendChild(elem)
del meta['copyright']
tmpex = doc.createElement('encoding')
if 'encoder' in meta:
elem = doc.createElement('encoder')
elem.appendChild(doc.createTextNode(meta['encoder']))
tmpex.appendChild(elem)
del meta['encoder']
elem = doc.createElement('software')
elem.appendChild(doc.createTextNode(u'MMLlib by Natureshadow, Creeparoo, and mirabilos'))
tmpex.appendChild(elem)
tmpel.appendChild(tmpex)
if 'source' in meta:
elem = doc.createElement('source')
elem.appendChild(doc.createTextNode(meta['source']))
tmpel.appendChild(elem)
del meta['source']
tmpex = doc.createElement('miscellaneous')
meta["duration"] = int(meta["duration"])
for tmp in sorted(meta):
elem = doc.createElement('miscellaneous-field')
elem.setAttribute('name', tmp)
elem.appendChild(doc.createTextNode(str(meta[tmp])))
tmpex.appendChild(elem)
tmpel.appendChild(tmpex)
score.appendChild(tmpel)
# required metadata
tmpel = doc.createElement('part-list')
for trkno in range(1, len(staves) + 1):
score_part = doc.createElement('score-part')
score_part.setAttribute('id', 'P' + str(trkno))
part_name = doc.createElement('part-name')
part_name.appendChild(doc.createTextNode(u'Track ' + str(trkno)))
score_part.appendChild(part_name)
tmpel.appendChild(score_part)
score.appendChild(tmpel)
# figure out which duration to use
notelens = 4
for trkno in range(1, len(staves) + 1):
for ply in staves[trkno - 1]:
if isinstance(ply, tuple):
dottedlen = ply[2]
for tmp in range(0, ply[3]):
dottedlen *= 2
# calculate lowest common multiple
notelens = (notelens * dottedlen) // gcd(notelens, dottedlen)
divisions = notelens // 4
# add individual staves
for trkno in range(1, len(staves) + 1):
staff = staves[trkno - 1]
trknode = doc.createElement('part')
trknode.setAttribute('id', 'P' + str(trkno))
# attribute node, once per part, located in the first bar
tmpel = doc.createElement('attributes')
elem = doc.createElement('divisions')
elem.appendChild(doc.createTextNode(str(divisions)))
tmpel.appendChild(elem)
# use treble clef by default
tmpex = doc.createElement('clef')
elem = doc.createElement('sign')
elem.appendChild(doc.createTextNode(u'G'))
tmpex.appendChild(elem)
elem = doc.createElement('line')
elem.appendChild(doc.createTextNode(u'2'))
tmpex.appendChild(elem)
tmpel.appendChild(tmpex)
# "current" bar node and number (first, here)
barno = 1
barnode = doc.createElement('measure')
barnode.setAttribute('number', str(barno))
barnode.appendChild(tmpel)
# hack to never end on a bar line – end needs special love
while len(staff) > 0 and staff[-1] == 1:
staff.pop()
# now iterate through the staff
bpm = -1
lastslur = None
inslur = 0
for ply in staff:
# finish a bar?
if ply == 1:
trknode.appendChild(barnode)
# force re-init on next note
barnode = None
continue
# start a new bar?
if barnode is None:
barno += 1
barnode = doc.createElement('measure')
barnode.setAttribute('number', str(barno))
# tempo change?
if bpm != ply[0]:
tmpel = doc.createElement('direction')
tmpex = doc.createElement('metronome')
elem = doc.createElement('beat-unit')
elem.appendChild(doc.createTextNode(u'quarter'))
tmpex.appendChild(elem)
elem = doc.createElement('per-minute')
elem.appendChild(doc.createTextNode(str(ply[0])))
tmpex.appendChild(elem)
elem = doc.createElement('direction-type')
elem.appendChild(tmpex)
tmpel.appendChild(elem)
elem = doc.createElement('sound')
elem.setAttribute('tempo', str(ply[0]))
tmpel.appendChild(elem)
barnode.appendChild(tmpel)
# unpack and convert raw note to pitch (best guess)
(bpm, art, length, ndots, extra) = ply
if not isinstance(ply, tuple) and extra != -1:
extra = MML_NOTE2PITCH[extra]
# convert to MusicXML
tmpel = doc.createElement('note')
if extra == -1:
tmpex = doc.createElement('rest')
else:
tmpex = doc.createElement('pitch')
elem = doc.createElement('step')
elem.appendChild(doc.createTextNode(str(extra[1])))
tmpex.appendChild(elem)
if extra[2] != u'♮':
elem = doc.createElement('alter')
if extra[2] == u'♭':
elem.appendChild(doc.createTextNode(u'-1'))
elif extra[2] == u'♯':
elem.appendChild(doc.createTextNode(u'1'))
tmpex.appendChild(elem)
elem = doc.createElement('octave')
elem.appendChild(doc.createTextNode(str(extra[0] + 2)))
tmpex.appendChild(elem)
tmpel.appendChild(tmpex)
# if notelens calculation is correct, dottedlen is always integer
dottedlen = notelens / length
for tmp in range(0, ndots):
dottedlen *= 1.5
elem = doc.createElement('duration')
elem.appendChild(doc.createTextNode(str(int(dottedlen))))
tmpel.appendChild(elem)
if length in _MUSICXML_NOTETYPES.keys():
elem = doc.createElement('type')
elem.appendChild(doc.createTextNode(_MUSICXML_NOTETYPES[length]))
tmpel.appendChild(elem)
# order is important!
for tmp in range(0, ndots):
tmpel.appendChild(doc.createElement('dot'))
# articulation - is this a note (no pause)?
if extra != -1:
# not a pause then… ML started on the previous note?
if inslur == 1:
# start Binde-/Haltebogen
elem = doc.createElement('slur')
elem.setAttribute('type', 'start')
lastslur.appendChild(elem)
# ML while slur is active?
if inslur > 0 and art == 'L':
# just cache this node and go on
lastslur = tmpel
inslur = 2
# ML start?
if inslur == 0 and art == 'L':
# cache notations node, filled in next note
lastslur = doc.createElement('notations')
tmpel.appendChild(lastslur)
inslur = 1
# ML end on this note and/or MS? => common XML element
if (inslur > 0 and art != 'L') or art == 'S':
tmpex = doc.createElement('notations')
tmpel.appendChild(tmpex)
# ML end on this note?
if inslur > 0 and art != 'L':
# end Binde-/Haltebogen
elem = doc.createElement('slur')
elem.setAttribute('type', 'stop')
tmpex.appendChild(elem)
lastslur = None
inslur = 0
# MS for this note?
if art == 'S':
# create staccato dot
elem = doc.createElement('articulations')
elem.appendChild(doc.createElement('staccato'))
tmpex.appendChild(elem)
# MN does not need any extra handling
else:
# ML started on the previous note, detached legato
if inslur == 1:
elem = doc.createElement('articulations')
elem.appendChild(doc.createElement('detached-legato'))
lastslur.appendChild(elem)
lastslur = None
inslur = 0
# ML started before the previous note, end Binde-/Haltebogen
if inslur == 2:
tmpex = doc.createElement('notations')
elem = doc.createElement('slur')
elem.setAttribute('type', 'stop')
tmpex.appendChild(elem)
lastslur.appendChild(tmpex)
lastslur = None
inslur = 0
barnode.appendChild(tmpel)
# any unfinished ML? detached legato or end Binde-/Haltebogen
if inslur == 1:
elem = doc.createElement('articulations')
elem.appendChild(doc.createElement('detached-legato'))
lastslur.appendChild(elem)
if inslur == 2:
tmpex = doc.createElement('notations')
elem = doc.createElement('slur')
elem.setAttribute('type', 'stop')
tmpex.appendChild(elem)
lastslur.appendChild(tmpex)
# finish staff
tmpex = doc.createElement('barline')
elem = doc.createElement('bar-style')
elem.appendChild(doc.createTextNode(u'light-heavy'))
tmpex.appendChild(elem)
barnode.appendChild(tmpex)
trknode.appendChild(barnode)
score.appendChild(trknode)
return doc
def _create_xml_file(meta, staves):
""" Export collected data and metadata as MusicXML
Exports metadata and staves as MusicXML document,
rendered as an XML file.
The XML file is minified; if human inspection is required,
pipe through “xmlstarlet fo”. Do n̲o̲t̲ use .toprettyxml() as
it adds extra format-violating whitespace to text nodes!
meta - the metadata, as returned by mml_file_meta()
staves - the collected tracks, as returned by mml_file() with _overridden_play
Returns the MusicXML document encoded as UTF-8 string
"""
return _create_xml_doc(meta, staves).toxml("UTF-8")
def convert_mml_file(filename):
""" Convert MML file to MusicXML
Reads the MML file twice (once for metadata, once for data),
converts it to MusicXML and renders it as XML file.
filename - the MML file
Returns the MusicXML document encoded as UTF-8 string.
"""
meta = mml_file_meta(filename)
staves = mml_file(filename, _overridden_play)
return _create_xml_file(meta, staves)
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