X-Git-Url: https://scm.cri.minesparis.psl.eu/git/minwii.git/blobdiff_plain/e7854ed82aa375273bfbf772493739f875817061..46f3ffd7fdde386f41020171b5733e55a8e64a85:/src/minwii/musicxml.py

diff --git a/src/minwii/musicxml.py b/src/minwii/musicxml.py
new file mode 100755
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+++ b/src/minwii/musicxml.py
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+# -*- coding: utf-8 -*-
+"""
+conversion 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
+from itertools import cycle
+#from Song import Song
+
+# Do4 <=> midi 60
+OCTAVE_REF = 4
+DIATO_SCALE = {'C' : 60,
+               'D' : 62,
+               'E' : 64,
+               'F' : 65,
+               'G' : 67,
+               'A' : 69,
+               'B' : 71}
+
+CHROM_SCALE = {  0 : ('C',  0),
+                 1 : ('C',  1),
+                 2 : ('D',  0),
+                 3 : ('E', -1),
+                 4 : ('E',  0),
+                 5 : ('F',  0),
+                 6 : ('F',  1),
+                 7 : ('G',  0),
+                 8 : ('G',  1),
+                 9 : ('A',  0),
+                10 : ('B', -1),
+                11 : ('B',  0)}
+
+
+FR_NOTES = {'C' : u'Do',
+            'D' : u'Ré',
+            'E' : u'Mi',
+            'F' : u'Fa',
+            'G' : u'Sol',
+            'A' : u'La',
+            'B' : u'Si'}
+
+_marker = []
+
+class Part(object) :
+        
+    def __init__(self, node, autoDetectChorus=True) :
+        self.node = node
+        self.notes = []
+        self.repeats = []
+        self.distinctNotes = []
+        self.quarterNoteDuration = 500
+        self._parseMusic()
+        self.verses = [[]]
+        self.chorus = []
+        if autoDetectChorus :
+            self._findChorus()
+        self._findVersesLoops()
+    
+    def _parseMusic(self) :
+        divisions = 0
+        previous = None
+        distinctNotesDict = {}
+
+        for measureNode in self.node.getElementsByTagName('measure') :
+            measureNotes = []
+            
+            # iteration sur les notes
+            # divisions de la noire
+            divisions = int(_getNodeValue(measureNode, 'attributes/divisions', divisions))
+            for noteNode in measureNode.getElementsByTagName('note') :
+                note = Note(noteNode, divisions, previous)
+                if (not note.isRest) and (not note.tiedStop) :
+                    measureNotes.append(note)
+                    if previous :
+                        previous.next = note
+                elif note.tiedStop :
+                    assert previous.tiedStart
+                    previous.addDuration(note)
+                    continue
+                else :
+                    previous.addDuration(note)
+                    continue
+                previous = note
+
+            self.notes.extend(measureNotes)
+
+            for note in measureNotes :
+                if not distinctNotesDict.has_key(note.midi) :
+                    distinctNotesDict[note.midi] = True
+                    self.distinctNotes.append(note)
+            
+            # barres de reprises
+            try :
+                barlineNode = measureNode.getElementsByTagName('barline')[0]
+            except IndexError :
+                continue
+            
+            barline = Barline(barlineNode, measureNotes)
+            if barline.repeat :
+                self.repeats.append(barline)
+        
+        self.distinctNotes.sort(lambda a, b : cmp(a.midi, b.midi))
+        sounds = self.node.getElementsByTagName('sound')
+        tempo = 120
+        for sound in sounds :
+            if sound.hasAttribute('tempo') :
+                tempo = float(sound.getAttribute('tempo'))
+                break
+        
+        self.quarterNoteDuration = int(round(60000/tempo))
+        
+        
+
+    def _findChorus(self):
+        """ le refrain correspond aux notes pour lesquelles
+            il n'existe q'une seule syllable attachée.
+        """
+        start = stop = None
+        for i, note in enumerate(self.notes) :
+            ll = len(note.lyrics)
+            if start is None and ll == 1 :
+                start = i
+            elif start is not None and ll > 1 :
+                stop = i
+                break
+        if not (start or stop) :
+            self.chorus = []
+        else :
+            self.chorus = self.notes[start:stop]
+    
+    def _findVersesLoops(self) :
+        "recherche des couplets / boucles"
+        verse = self.verses[0]
+        for note in self.notes[:-1] :
+            verse.append(note)
+            ll = len(note.lyrics)
+            nll = len(note.next.lyrics)
+            if ll != nll :
+                verse = []
+                self.verses.append(verse)
+        verse.append(self.notes[-1])
+        
+    
+    def iterNotes(self, indefinitely=True) :
+        "exécution de la chanson avec l'alternance couplets / refrains"
+        if indefinitely == False :
+            iterable = self.verses
+        else :
+            iterable = cycle(self.verses)
+        for verse in iterable :
+            #print "---partie---"
+            repeats = len(verse[0].lyrics)
+            if repeats > 1 :
+                for i in range(repeats) :
+                    # couplet
+                    #print "---couplet%d---" % i
+                    for note in verse :
+                        yield note, i
+                    # refrain
+                    #print "---refrain---"
+                    for note in self.chorus :
+                        yield note, 0
+            else :
+                for note in verse :
+                    yield note, 0
+        
+    def pprint(self) :
+        for note, verseIndex in self.iterNotes(indefinitely=False) :
+            print note, note.lyrics[verseIndex]
+
+
+    def assignNotesFromMidiNoteNumbers(self):
+        # TODO faire le mapping bande hauteur midi
+        for i in range(len(self.midiNoteNumbers)):
+            noteInExtendedScale = 0
+            while self.midiNoteNumbers[i] > self.scale[noteInExtendedScale] and noteInExtendedScale < len(self.scale)-1:
+                noteInExtendedScale += 1
+            if self.midiNoteNumbers[i]<self.scale[noteInExtendedScale]:
+                noteInExtendedScale -= 1
+            self.notes.append(noteInExtendedScale)
+
+
+class Barline(object) :
+
+    def __init__(self, node, measureNotes) :
+        self.node = node
+        location = self.location = node.getAttribute('location') or 'right'
+        try :
+            repeatN = node.getElementsByTagName('repeat')[0]
+            repeat = {'direction' : repeatN.getAttribute('direction'),
+                      'times' : int(repeatN.getAttribute('times') or 1)}
+            if location == 'left' :
+                repeat['note'] = measureNotes[0]
+            elif location == 'right' :
+                repeat['note'] = measureNotes[-1]
+            else :
+                raise ValueError(location)
+            self.repeat = repeat
+        except IndexError :
+            self.repeat = None
+    
+    def __str__(self)  :
+        if self.repeat :
+            if self.location == 'left' :
+                return '|:'
+            elif self.location == 'right' :
+                return ':|'
+        return '|'
+
+    __repr__ = __str__
+
+
+class Tone(object) :
+    
+    @staticmethod
+    def midi_to_step_alter_octave(midi):
+        stepIndex = midi % 12
+        step, alter = CHROM_SCALE[stepIndex]
+        octave = midi / 12 - 1
+        return step, alter, octave
+    
+    
+    def __init__(self, *args) :
+        if len(args) == 3 :
+            self.step, self.alter, self.octave = args
+        elif len(args) == 1 :
+            midi = args[0]
+            self.step, self.alter, self.octave = Tone.midi_to_step_alter_octave(midi)
+
+    @property
+    def midi(self) :
+        mid = DIATO_SCALE[self.step]
+        mid = mid + (self.octave - OCTAVE_REF) * 12
+        mid = mid + self.alter
+        return mid
+
+    
+    @property
+    def name(self) :
+        name = u'%s%d' % (self.step, self.octave)
+        if self.alter < 0 :
+            alterext = 'b'
+        else :
+            alterext = '#'
+        name = '%s%s' % (name, abs(self.alter) * alterext)
+        return name
+
+    @property
+    def nom(self) :
+        name = FR_NOTES[self.step]
+        if self.alter < 0 :
+            alterext = u'♭'
+        else :
+            alterext = u'#'
+        name = u'%s%s' % (name, abs(self.alter) * alterext)
+        return name
+        
+        
+
+class Note(Tone) :
+    scale = [55, 57, 59, 60, 62, 64, 65, 67, 69, 71, 72]
+    
+    def __init__(self, node, divisions, previous) :
+        self.node = node
+        self.isRest = False
+        self.tiedStart = False
+        self.tiedStop = False
+        
+        tieds = _getElementsByPath(node, 'notations/tied', [])
+        for tied in tieds :
+            if tied.getAttribute('type') == 'start' :
+                self.tiedStart = True
+            elif tied.getAttribute('type') == 'stop' :
+                self.tiedStop = True
+        
+        self.step = _getNodeValue(node, 'pitch/step', None)
+        if self.step is not None :
+            self.octave = int(_getNodeValue(node, 'pitch/octave'))
+            self.alter = int(_getNodeValue(node, 'pitch/alter', 0))
+        elif self.node.getElementsByTagName('rest') :
+            self.isRest = True
+        else :
+            NotImplementedError(self.node.toxml('utf-8'))
+            
+        self._duration = float(_getNodeValue(node, 'duration'))
+        self.lyrics = []
+        for ly in node.getElementsByTagName('lyric') :
+            self.lyrics.append(Lyric(ly))
+
+        self.divisions = divisions
+        self.previous = previous
+        self.next = None
+    
+    def __str__(self) :
+        return (u'%5s %2s %2d %4s' % (self.nom, self.name, self.midi, round(self.duration, 2))).encode('utf-8')
+    
+    def __repr__(self) :
+        return self.name.encode('utf-8')
+    
+    def addDuration(self, note) :
+        self._duration = self.duration + note.duration
+        self.divisions = 1
+    
+    @property
+    def duration(self) :
+        return self._duration / self.divisions
+    
+    @property
+    def column(self):
+        return self.scale.index(self.midi)
+    
+
+class Lyric(object) :
+    
+    _syllabicModifiers = {
+        'single' : u'%s',
+        'begin'  : u'%s -',
+        'middle' : u'- %s -',
+        'end'    : u'- %s'
+        }
+    
+    def __init__(self, node) :
+        self.node = node
+        self.syllabic = _getNodeValue(node, 'syllabic', 'single')
+        self.text = _getNodeValue(node, 'text')
+    
+    def syllabus(self):
+        text = self._syllabicModifiers[self.syllabic] % self.text
+        return text
+    
+    def __str__(self) :
+        return self.syllabus().encode('utf-8')
+    __repr__  = __str__
+        
+        
+
+
+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 _getElementsByPath(node, path, default=_marker) :
+    try :
+        parts = path.split('/')
+        for name in parts[:-1] :
+            node = node.getElementsByTagName(name)[0]
+        return node.getElementsByTagName(parts[-1])
+    except IndexError :
+        if default is _marker :
+            raise
+        else :
+            return default
+
+def musicXml2Song(input, partIndex=0, autoDetectChorus=True, printNotes=False) :
+    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')
+    leadPart = parts[partIndex]
+    
+    part = Part(leadPart, autoDetectChorus=autoDetectChorus)
+    
+    if printNotes :
+        part.pprint()
+
+    return part
+
+    
+    
+def main() :
+    usage = "%prog musicXmlFile.xml [options]"
+    op = OptionParser(usage)
+    op.add_option("-i", "--part-index", dest="partIndex"
+                 , default = 0
+                 , help = "Index de la partie qui contient le champ.")
+
+    op.add_option("-p", '--print', dest='printNotes'
+                  , action="store_true"
+                  , default = False
+                  , help = "Affiche les notes sur la sortie standard (debug)")
+
+    op.add_option("-c", '--no-chorus', dest='autoDetectChorus'
+                , action="store_false"
+                , default = True
+                , help = "désactive la détection du refrain")
+
+    
+    options, args = op.parse_args()
+    
+    if len(args) != 1 :
+        raise SystemExit(op.format_help())
+    
+    musicXml2Song(args[0],
+                  partIndex=options.partIndex,
+                  autoDetectChorus=options.autoDetectChorus,
+                  printNotes=options.printNotes)
+
+
+if __name__ == '__main__' :
+    sys.exit(main())