Source code for audiodata.aio.sunauio

# -*- coding: UTF-8 -*-
:author:   Nicolas Chazeau, Brigitte Bigi
:summary:  Sun AU audio support..

.. _This file is part of SPPAS:

     ___   __    __    __    ___
    /     |  \  |  \  |  \  /              the automatic
    \__   |__/  |__/  |___| \__             annotation and
       \  |     |     |   |    \             analysis
    ___/  |     |     |   | ___/              of speech

    Copyright (C) 2011-2021  Brigitte Bigi
    Laboratoire Parole et Langage, Aix-en-Provence, France

    Use of this software is governed by the GNU Public License, version 3.

    SPPAS 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 3 of the License, or
    (at your option) any later version.

    SPPAS is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with SPPAS. If not, see <>.

    This banner notice must not be removed.



import sunau

from import sppasAudioPCM

# ---------------------------------------------------------------------------

[docs]class SunauIO(sppasAudioPCM): """A Sun AU file open/save utility class. """
[docs] def __init__(self): """Constructor.""" super(SunauIO, self).__init__()
# ------------------------------------------------------------------------
[docs] def open(self, filename): """Get an audio from a Audio Interchange File Format file. :param filename: (str) input file name. """ # Use the standard wave library to load the wave file # open method returns a Wave_read() object self._audio_fp =, "r")
# -----------------------------------------------------------------------
[docs] def save(self, filename): """Write an audio content as a Audio Interchange File Format file. :param filename: (str) output filename. """ if self._audio_fp: self.rewind() frames = self._audio_fp.readframes(self._audio_fp.getnframes()) self.save_fragment(filename, frames) elif len(self) == 1: channel = self._channels[0] f = sunau.Au_write(filename) f.setnchannels(1) f.setsampwidth(channel.get_sampwidth()) f.setframerate(channel.get_framerate()) try: f.writeframes(channel.frames) finally: f.close() else: self.verify_channels() frames = b"" sp = self._channels[0].get_sampwidth() for i in range(0, self._channels[0].get_nframes()*sp, sp): for j in range(len(self._channels)): fc = self._channels[j].get_frames() frames += fc[i:i+sp] f = sunau.Au_write(filename) f.setnchannels(len(self._channels)) f.setsampwidth(sp) f.setframerate(self._channels[0].get_framerate()) try: f.writeframes(frames) finally: f.close()
# -----------------------------------------------------------------------
[docs] def save_fragment(self, filename, frames): """Write an audio content as a Audio Interchange File Format file. :param filename: (str) output filename. :param frames: (str) the frames to write """ f = sunau.Au_write(filename) f.setnchannels(self.get_nchannels()) f.setsampwidth(self.get_sampwidth()) f.setframerate(self.get_framerate()) try: f.writeframes(frames) finally: f.close()