Expérimentations (concluantes) de hand tracking.

[minwii.git] / src / minwii / musicxml.py

diff --git a/src/minwii/musicxml.py b/src/minwii/musicxml.py
index ff819e1..54d859f 100755 (executable)
--- a/src/minwii/musicxml.py
+++ b/src/minwii/musicxml.py
@@ -140,13 +140,9 @@ class Part(object) :
                     break
         
     
-    def iterNotes(self, indefinitely=True) :
+    def iterNotes(self) :
         "exécution de la chanson avec l'alternance couplets / refrains"
-        if indefinitely == False :
-            iterable = self.verses
-        else :
-            iterable = cycle(self.verses)
-        for verse in iterable :
+        for verse in self.verses :
             if self.songStartsWithChorus :
                 for note in self.chorus :
                     yield note, 0
@@ -166,6 +162,31 @@ class Part(object) :
             else :
                 for note in verse :
                     yield note, 0
+    
+    @property
+    def intervalsHistogram(self) :
+        histogram = {}
+        it = self.iterNotes()
+        previousNote = it.next()[0]
+        for note, _ in it :
+            interval = note.midi - previousNote.midi
+            if histogram.has_key(interval) :
+                histogram[interval] += 1
+            else :
+                histogram[interval] = 1
+            previousNote = note
+        return histogram
+    
+    @property
+    def duration(self) :
+        'Durée de référence du morceau en milisecondes'
+        it = self.iterNotes()
+        duration = 0
+        for note, verseIndex in it :
+            duration = duration + note.duration
+        duration = duration * self.quarterNoteDuration # en milisecondes
+        return duration
+        
         
     def pprint(self) :
         for note, verseIndex in self.iterNotes(indefinitely=False) :
@@ -369,7 +390,8 @@ def musicXml2Song(input, partIndex=0, autoDetectChorus=True, printNotes=False) :
     doc = d.documentElement
     
     # TODO conversion préalable score-timewise -> score-partwise
-    assert doc.nodeName == u'score-partwise'
+    if doc.nodeName != u'score-partwise' :
+        raise ValueError('not a musicxml file')
     
     parts = doc.getElementsByTagName('part')
     leadPart = parts[partIndex]
@@ -406,10 +428,13 @@ def main() :
     if len(args) != 1 :
         raise SystemExit(op.format_help())
     
-    musicXml2Song(args[0],
+    song = musicXml2Song(args[0],
                   partIndex=options.partIndex,
                   autoDetectChorus=options.autoDetectChorus,
                   printNotes=options.printNotes)
+    from pprint import pprint
+    pprint(song.intervalsHistogram)
+    print song.duration
 
 
 if __name__ == '__main__' :