Source code for pytomo.kaa_metadata.audio.pcm
# -*- coding: iso-8859-1 -*-
# -----------------------------------------------------------------------------
# pcm.py - pcm file parser
# -----------------------------------------------------------------------------
# $Id: pcm.py 3983 2009-05-14 18:58:44Z tack $
#
# -----------------------------------------------------------------------------
# kaa-Metadata - Media Metadata for Python
# Copyright (C) 2003-2006 Thomas Schueppel, Dirk Meyer
#
# First Edition: Thomas Schueppel <stain@acm.org>
# Maintainer: Dirk Meyer <dischi@freevo.org>
#
# Please see the file AUTHORS for a complete list of authors.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of MER-
# CHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
# Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# -----------------------------------------------------------------------------
from __future__ import absolute_import
__all__ = ['Parser']
# python imports
import sndhdr
# import kaa_metadata.audio core
from . import core
class PCM(core.Music):
def __init__(self,file):
core.Music.__init__(self)
t = self._what(file)
if not t:
raise core.ParseError()
(self.type, self.samplerate, self.channels, self.bitrate, \
self.samplebits) = t
if self.bitrate == -1:
# doesn't look right
raise core.ParseError()
self.mime = "audio/%s" % self.type
def _what(self,f):
"""Recognize sound headers"""
h = f.read(512)
for tf in sndhdr.tests:
try:
res = tf(h, f)
except IndexError:
# input too small.
continue
if res:
return res
return None
Parser = PCM