Extracted read_wave_duration out of code

python_apps/media-monitor2/media/monitor/pure.py

@@ -3,6 +3,8 @@ import copy
 import subprocess
 import os
 import math
+import wave
+import contextlib
 import shutil
 import re
 import sys
@@ -97,6 +99,13 @@ def is_airtime_recorded(md):
     if not 'MDATA_KEY_CREATOR' in md: return False
     return md['MDATA_KEY_CREATOR'] == u'Airtime Show Recorder'
 
+def read_wave_duration(path):
+    with contextlib.closing(wave.open(path,'r')) as f:
+        frames   = f.getnframes()
+        rate     = f.getframerate()
+        duration = frames/float(rate)
+        return duration
+
 def clean_empty_dirs(path):
     """
     walks path and deletes every empty directory it finds