exécution de la chanson avec alternance couplets / refrains.

[minwii.git] / src / songs / musicxmltosong.py

diff --git a/src/songs/musicxmltosong.py b/src/songs/musicxmltosong.py
index 3de33ca..00903a1 100755 (executable)
--- a/src/songs/musicxmltosong.py
+++ b/src/songs/musicxmltosong.py
@@ -22,16 +22,98 @@ DIATO_SCALE = {'C' : 60,
                'B' : 71}
 _marker = []
 
+class Part(object) :
+    
+    def __init__(self, node, autoDetectChorus=True) :
+        self.node = node
+        self.notes = []
+        self._parseMusic()
+        self.verses = [[]]
+        self.chorus = []
+        if autoDetectChorus :
+            self._findChorus()
+        self._findVersesLoops()
+    
+    def _parseMusic(self) :
+        divisions = 0
+        noteIndex = 0
+        next = previous = None
+        for measureNode in self.node.getElementsByTagName('measure') :
+            # divisions de la noire
+            divisions = int(_getNodeValue(measureNode, 'attributes/divisions', divisions))
+            for noteNode in measureNode.getElementsByTagName('note') :
+                note = Note(noteNode, divisions, previous)
+                self.notes.append(note)
+                try :
+                    self.notes[noteIndex-1].next = note
+                except IndexError:
+                    pass
+                previous = note
+                noteIndex += 1
+
+    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
+        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) :
+        "exécution de la chanson avec l'alternance couplets / refrains"
+        for verse in self.verses :
+            repeats = len(verse[0].lyrics)
+            if repeats > 1 :
+                for i in range(repeats) :
+                    # couplet
+                    for note in verse :
+                        yield note, i
+                    # 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() :
+            print note.name, note.midi, note.duration, note.lyrics[verseIndex]
+        
+        
 
 class Note(object) :
-    def __init__(self, node, divisions) :
+    def __init__(self, node, divisions, previous) :
+        self.node = node
         self.step = _getNodeValue(node, 'pitch/step')
         self.octave = int(_getNodeValue(node, 'pitch/octave'))
         self.alter = int(_getNodeValue(node, 'pitch/alter', 0))
         self._duration = float(_getNodeValue(node, 'duration'))
-        self.lyric = _getNodeValue(node, 'lyric/text', '')
+        self.lyrics = []
+        for ly in node.getElementsByTagName('lyric') :
+            self.lyrics.append(Lyric(ly))
 
         self.divisions = divisions
+        self.previous = previous
+        self.next = None
     
     @property
     def midi(self) :
@@ -53,6 +135,17 @@ class Note(object) :
             alterext = '#'
         name = '%s%s' % (name, abs(self.alter) * alterext)
         return name
+    
+
+class Lyric(object) :
+    def __init__(self, node) :
+        self.node = node
+        self.syllabic = _getNodeValue(node, 'syllabic', 'single')
+        self.text = _getNodeValue(node, 'text')
+    
+    def __str__(self) :
+        return self.text.encode('utf-8')
+    __repr__  = __str__
         
         
 
@@ -81,26 +174,31 @@ def musicXml2Song(input, output, partIndex=0, printNotes=False) :
     parts = doc.getElementsByTagName('part')
     leadPart = parts[partIndex]
     
+    part = Part(leadPart)
+    
+    if printNotes :
+        part.pprint()
+    
     # divisions de la noire
-    divisions = 0
-    midiNotes, durations, lyrics = [], [], []
-
-    for measureNode in leadPart.getElementsByTagName('measure') :
-        divisions = int(_getNodeValue(measureNode, 'attributes/divisions', divisions))
-        for noteNode in measureNode.getElementsByTagName('note') :
-            note = Note(noteNode, divisions)
-            if printNotes :
-                print note.name, note.midi, note.duration, note.lyric
-            midiNotes.append(note.midi)
-            durations.append(note.duration)
-            lyrics.append(note.lyric)
-    
-    song = Song(None,
-                midiNoteNumbers = midiNotes,
-                noteLengths = durations,
-                lyrics = lyrics,
-                notesInExtendedScale=None)
-    song.save(output)
+#    divisions = 0
+#    midiNotes, durations, lyrics = [], [], []
+#
+#    for measureNode in leadPart.getElementsByTagName('measure') :
+#        divisions = int(_getNodeValue(measureNode, 'attributes/divisions', divisions))
+#        for noteNode in measureNode.getElementsByTagName('note') :
+#            note = Note(noteNode, divisions)
+#            if printNotes :
+#                print note.name, note.midi, note.duration, note.lyric
+#            midiNotes.append(note.midi)
+#            durations.append(note.duration)
+#            lyrics.append(note.lyric)
+#    
+#    song = Song(None,
+#                midiNoteNumbers = midiNotes,
+#                noteLengths = durations,
+#                lyrics = lyrics,
+#                notesInExtendedScale=None)
+#    song.save(output)
     
     
 def main() :