A little cleanup of the libs due to OCD

lib/mutagen/wavpack.py

@@ -0,0 +1,63 @@
+# A WavPack reader/tagger
+#
+# Copyright 2006 Joe Wreschnig
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+
+"""WavPack reading and writing.
+
+WavPack is a lossless format that uses APEv2 tags. Read
+http://www.wavpack.com/ for more information.
+"""
+
+__all__ = ["WavPack", "Open", "delete"]
+
+from mutagen.apev2 import APEv2File, error, delete
+from mutagen._util import cdata
+
+
+class WavPackHeaderError(error):
+    pass
+
+RATES = [6000, 8000, 9600, 11025, 12000, 16000, 22050, 24000, 32000, 44100,
+         48000, 64000, 88200, 96000, 192000]
+
+
+class WavPackInfo(object):
+    """WavPack stream information.
+
+    Attributes:
+
+    * channels - number of audio channels (1 or 2)
+    * length - file length in seconds, as a float
+    * sample_rate - audio sampling rate in Hz
+    * version - WavPack stream version
+    """
+
+    def __init__(self, fileobj):
+        header = fileobj.read(28)
+        if len(header) != 28 or not header.startswith("wvpk"):
+            raise WavPackHeaderError("not a WavPack file")
+        samples = cdata.uint_le(header[12:16])
+        flags = cdata.uint_le(header[24:28])
+        self.version = cdata.short_le(header[8:10])
+        self.channels = bool(flags & 4) or 2
+        self.sample_rate = RATES[(flags >> 23) & 0xF]
+        self.length = float(samples) / self.sample_rate
+
+    def pprint(self):
+        return "WavPack, %.2f seconds, %d Hz" % (self.length, self.sample_rate)
+
+
+class WavPack(APEv2File):
+    _Info = WavPackInfo
+    _mimes = ["audio/x-wavpack"]
+
+    @staticmethod
+    def score(filename, fileobj, header):
+        return header.startswith("wvpk") * 2
+
+
+Open = WavPack