-"""
-converstion d'un fichier musicxml en objet song minwii.
-
-$Id$
-$URL$
-"""
-import sys
-from types import StringTypes
-from xml.dom.minidom import parse
-from optparse import OptionParser
-
-# Do4 <=> midi 60
-OCTAVE_REF = 4
-DIATO_SCALE = {'C' : 60,
- 'D' : 62,
- 'E' : 64,
- 'F' : 65,
- 'G' : 67,
- 'A' : 69,
- 'B' : 71}
-_marker = []
-
-
-class Note(object) :
- def __init__(self, node, divisions) :
- self.name = _getNodeValue(node, 'pitch/step')
- self.octave = int(_getNodeValue(node, 'pitch/octave'))
- self._duration = float(_getNodeValue(node, 'duration'))
- self.divisions = divisions
-
- @property
- def midi(self) :
- mid = DIATO_SCALE[self.name]
- mid = mid + (self.octave - OCTAVE_REF) * 12
- return mid
-
- @property
- def duration(self) :
- return self._duration / self.divisions
-
-
-
-def _getNodeValue(node, path, default=_marker) :
- try :
- for name in path.split('/') :
- node = node.getElementsByTagName(name)[0]
- return node.firstChild.nodeValue
- except :
- if default is _marker :
- raise
- else :
- return default
-
-def musicXml2Song(input, output) :
- if isinstance(input, StringTypes) :
- input = open(input, 'r')
-
- d = parse(input)
- doc = d.documentElement
-
- # TODO conversion préalable score-timewise -> score-partwise
- assert doc.nodeName == u'score-partwise'
-
- parts = doc.getElementsByTagName('part')
- # on suppose que la première partie est le chant
- leadPart = parts[0]
-
- # divisions de la noire
- divisions = 0
- for measureNode in leadPart.getElementsByTagName('measure') :
- divisions = int(_getNodeValue(measureNode, 'attributes/divisions', divisions))
- for noteNode in measureNode.getElementsByTagName('note') :
- note = Note(noteNode, divisions)
- print note.name, note.octave, note.midi, note.duration
-
-
-def main() :
- usage = "%prog musicXmlFile.xml outputSongFile.smwi [options]"
- op = OptionParser(usage)
-
- options, args = op.parse_args()
- if len(args) != 2 :
- raise SystemExit(op.format_help())
-
- musicXml2Song(*args)
-
-
-
-if __name__ == '__main__' :
- sys.exit(main())