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diff --git a/libjava/classpath/javax/sound/sampled/AudioFormat.java b/libjava/classpath/javax/sound/sampled/AudioFormat.java
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+/* An audio format
+   Copyright (C) 2005 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath 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, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY 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 GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package javax.sound.sampled;
+
+import gnu.java.lang.CPStringBuilder;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * This class describes an audio format, including its encoding,
+ * the number of channels, its frame rate, etc.
+ * @since 1.3
+ */
+public class AudioFormat
+{
+  /**
+   * This describes a given audio format encoding.
+   * @since 1.3
+   */
+  public static class Encoding
+  {
+    /** The ALAW encoding.  */
+    public static final Encoding ALAW = new Encoding("alaw");
+
+    /** The signed PCM encoding.  */
+    public static final Encoding PCM_SIGNED = new Encoding("pcm_signed");
+
+    /** The unsigned PCM encoding.  */
+    public static final Encoding PCM_UNSIGNED = new Encoding("pcm_unsigned");
+
+    /** The ULAW encoding.  */
+    public static final Encoding ULAW = new Encoding("ulaw");
+
+    private String name;
+
+    /**
+     * Create a new encoding descriptor, given its name.
+     * @param name the name
+     */
+    public Encoding(String name)
+    {
+      this.name = name;
+    }
+
+    public final boolean equals(Object o)
+    {
+      return super.equals(o);
+    }
+
+    public final int hashCode()
+    {
+      return super.hashCode();
+    }
+
+    /**
+     * Return the name of this encoding.
+     */
+    public final String toString()
+    {
+      return name;
+    }
+  }
+
+  /**
+   * True if the audio data is stored big-endian.
+   */
+  protected boolean bigEndian;
+
+  /**
+   * The number of channels of data in this format.
+   */
+  protected int channels;
+
+  /**
+   * The encoding of this format.
+   */
+  protected Encoding encoding;
+
+  /**
+   * The frame rate of this format.  This is the number of frames
+   * per second.
+   */
+  protected float frameRate;
+
+  /**
+   * The number of bytes per frame in this format.
+   */
+  protected int frameSize;
+
+  /**
+   * The number of samples per second.
+   */
+  protected float sampleRate;
+
+  /**
+   * The number of bits in each sample.
+   */
+  protected int sampleSizeInBits;
+
+  private Map<String, Object> properties;
+
+  /**
+   * Create a new audio format, given various attributes of it.
+   * The properties map for this format will be empty.
+   *
+   * @param encoding the encoding for this format
+   * @param sampleRate the sample rate
+   * @param sampleSizeInBits the sample size, in bits
+   * @param channels the number of channels
+   * @param frameSize the frame size, in bytes
+   * @param frameRate the frame rate, in frames per second
+   * @param bigEndian true if the data is stored big-endian
+   */
+  public AudioFormat(Encoding encoding, float sampleRate, int sampleSizeInBits,
+                     int channels, int frameSize, float frameRate,
+                     boolean bigEndian)
+  {
+    this.encoding = encoding;
+    this.sampleRate = sampleRate;
+    this.sampleSizeInBits = sampleSizeInBits;
+    this.channels = channels;
+    this.frameSize = frameSize;
+    this.frameRate = frameRate;
+    this.bigEndian = bigEndian;
+    this.properties = Collections.<String, Object> emptyMap();
+  }
+
+  /**
+   * Create a new audio format, given various attributes of it.
+   * The properties map is copied by this constructor, so changes
+   * to the argument Map will not affect the new object.
+   *
+   * @param encoding the encoding for this format
+   * @param sampleRate the sample rate
+   * @param sampleSizeInBits the sample size, in bits
+   * @param channels the number of channels
+   * @param frameSize the frame size, in bytes
+   * @param frameRate the frame rate, in frames per second
+   * @param bigEndian true if the data is stored big-endian
+   * @param properties a map describing properties of this format
+   */
+  public AudioFormat(Encoding encoding, float sampleRate, int sampleSizeInBits,
+                     int channels, int frameSize, float frameRate,
+                     boolean bigEndian, Map<String, Object> properties)
+  {
+    this.encoding = encoding;
+    this.sampleRate = sampleRate;
+    this.sampleSizeInBits = sampleSizeInBits;
+    this.channels = channels;
+    this.frameSize = frameSize;
+    this.frameRate = frameRate;
+    this.bigEndian = bigEndian;
+    this.properties = Collections.unmodifiableMap(new HashMap<String, Object>(properties));
+  }
+
+  /**
+   * Create a new PCM-based audio format, given various attributes of it.
+   * The encoding will either be Encoding#PCM_SIGNED or Encoding#PCM_UNSIGNED.
+   * The frame size for this format will be derived from the sample size in
+   * bits and the number of channels, unless one of those is
+   * AudioSystem#NOT_SPECIFIED.  The frame rate will be the same as the sample
+   * rate, and the properties map will be empty.
+   *
+   * @param sampleRate the sample rate
+   * @param sampleSizeInBits the sample size, in bits
+   * @param channels the number of channels
+   * @param signed true if this is a signed encoding
+   * @param bigEndian true if the data is stored big-endian
+   */
+  public AudioFormat(float sampleRate, int sampleSizeInBits,
+                     int channels, boolean signed, boolean bigEndian)
+  {
+    this.encoding = signed ? Encoding.PCM_SIGNED : Encoding.PCM_UNSIGNED;
+    this.sampleRate = sampleRate;
+    this.sampleSizeInBits = sampleSizeInBits;
+    this.channels = channels;
+    // It isn't clear whether channels can be NOT_SPECIFIED.
+    if (sampleSizeInBits == AudioSystem.NOT_SPECIFIED
+        || channels == AudioSystem.NOT_SPECIFIED)
+      this.frameSize = AudioSystem.NOT_SPECIFIED;
+    else
+      this.frameSize = (sampleSizeInBits + 7) / 8 * channels;
+    this.frameRate = sampleRate;
+    this.bigEndian = bigEndian;
+    this.properties = Collections.<String, Object> emptyMap();
+  }
+
+  /**
+   * Return the number of channels in this format.
+   */
+  public int getChannels()
+  {
+    return channels;
+  }
+
+  /**
+   * Return the encoding of this format.
+   */
+  public Encoding getEncoding()
+  {
+    return encoding;
+  }
+
+  /**
+   * Return the frame rate of this format.
+   */
+  public float getFrameRate()
+  {
+    return frameRate;
+  }
+
+  /**
+   * Return the frame size of this format.
+   */
+  public int getFrameSize()
+  {
+    return frameSize;
+  }
+
+  /**
+   * Given a key, return a property associated with this format;
+   * or null if this property is not set.
+   * @param key the name of the property
+   * @return the value of the property, or null if the property is not set
+   */
+  public Object getProperty(String key)
+  {
+    return properties.get(key);
+  }
+
+  /**
+   * Return the sample rate of this format.
+   */
+  public float getSampleRate()
+  {
+    return sampleRate;
+  }
+
+  /**
+   * Return the sample size of this format, in bits.
+   */
+  public int getSampleSizeInBits()
+  {
+    return sampleSizeInBits;
+  }
+
+  /**
+   * Return true if this format is big endian, false otherwise.
+   * This only matters for formats whose sample size is greater than
+   * one byte.
+   */
+  public boolean isBigEndian()
+  {
+    return bigEndian;
+  }
+
+  /**
+   * Return true if this audio format matches another.
+   * @param fmt the format to match against
+   * @return true if they match, false otherwise
+   */
+  public boolean matches(AudioFormat fmt)
+  {
+    if (! encoding.equals(fmt.encoding)
+        || channels != fmt.channels
+        || sampleSizeInBits != fmt.sampleSizeInBits
+        || frameSize != fmt.frameSize)
+      return false;
+    if (sampleRate != AudioSystem.NOT_SPECIFIED
+        && fmt.sampleRate != AudioSystem.NOT_SPECIFIED
+        && sampleRate != fmt.sampleRate)
+      return false;
+    if (frameRate != AudioSystem.NOT_SPECIFIED
+        && fmt.frameRate != AudioSystem.NOT_SPECIFIED
+        && frameRate != fmt.frameRate)
+      return false;
+    if (sampleSizeInBits > 8)
+      return bigEndian == fmt.bigEndian;
+    return true;
+  }
+
+  /**
+   * Return a read-only Map holding the properties associated with
+   * this format.
+   */
+  public Map<String, Object> properties()
+  {
+    return properties;
+  }
+
+  /**
+   * Return a description of this format.
+   */
+  public String toString()
+  {
+    CPStringBuilder result = new CPStringBuilder();
+
+    // usually at least encoding should be somewhat specified
+    result.append(encoding);
+
+    if (sampleRate != AudioSystem.NOT_SPECIFIED)
+      {
+        result.append(" ");
+        result.append(sampleRate);
+        result.append(" Hz");
+      }
+
+    if (sampleSizeInBits != AudioSystem.NOT_SPECIFIED)
+      {
+        result.append(" ");
+        result.append(sampleSizeInBits);
+        result.append(" bits");
+      }
+
+    if (channels != AudioSystem.NOT_SPECIFIED)
+      {
+        result.append(" ");
+        result.append(channels);
+        result.append(" channel");
+        if (channels > 1) result.append("s");
+      }
+
+    if (sampleSizeInBits > 8)
+      result.append(bigEndian ? " big endian" : " little endian");
+
+    return result.toString();
+  }
+}