/* * UlawEncoder.java * * This file is part of jsresources.org */ /* * Copyright (c) 1999, 2000 by Matthias Pfisterer * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * - Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. */ /* |<--- this code is formatted to fit into 80 columns --->| */ import java.io.IOException; import java.io.File; import javax.sound.sampled.AudioFileFormat; import javax.sound.sampled.AudioFormat; import javax.sound.sampled.AudioInputStream; import javax.sound.sampled.AudioSystem; /** <titleabbrev>UlawEncoder</titleabbrev> <title>Encoding an audio file to μ-law</title> <formalpara><title>Purpose</title> <para>Encodes a PCM audio file, writes the result as an <filename>.au</filename>-file, μ-law encoded. </para></formalpara> <formalpara><title>Usage</title> <para> <cmdsynopsis> <command>java UlawEncoder</command> <arg choice="plain"><replaceable class="parameter">pcmfile</replaceable></arg> <arg choice="plain"><replaceable class="parameter">ulawfile</replaceable></arg> </cmdsynopsis> </para> </formalpara> <formalpara><title>Parameters</title> <variablelist> <varlistentry> <term><option><replaceable class="parameter">pcmfile</replaceable></option></term> <listitem><para>the name of the PCM input file.</para></listitem> </varlistentry> <varlistentry> <term><option><replaceable class="parameter">ulawfile</replaceable></option></term> <listitem><para>the name of the μ-law output file.</para></listitem> </varlistentry> </variablelist> </formalpara> <formalpara><title>Bugs, limitations</title> <para>Does not work with the Sun jdk1.3 (see bug #4391108). According to Florian, this bug is fixed in jdk1.4.</para> </formalpara> <formalpara><title>Source code</title> <para> <ulink url="UlawEncoder.java.html">UlawEncoder.java</ulink> </para> </formalpara> */ public class UlawEncoder { public static void main(String[] args) { if (args.length != 2) { printUsageAndExit(); } File pcmFile = new File(args[0]); File ulawFile = new File(args[1]); AudioInputStream ais = null; try { ais = AudioSystem.getAudioInputStream(pcmFile); } catch (Exception e) { e.printStackTrace(); } if (ais == null) { out("cannot open audio file"); System.exit(1); } AudioFormat.Encoding targetEncoding = AudioFormat.Encoding.ULAW; AudioInputStream ulawAudioInputStreamAIS = AudioSystem.getAudioInputStream(targetEncoding, ais); AudioFileFormat.Type fileType = AudioFileFormat.Type.WAVE; int nWrittenFrames = 0; try { nWrittenFrames = AudioSystem.write(ulawAudioInputStreamAIS, fileType, ulawFile); } catch (IOException e) { e.printStackTrace(); } } private static void printUsageAndExit() { out("UlawEncoder: usage:"); out("\tjava UlawEncoder <pcmfile> <ulawfile>"); System.exit(1); } private static void out(String strMessage) { System.out.println(strMessage); } } /*** UlawEncoder.java ***/