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diff --git a/libjava/classpath/javax/sound/sampled/AudioInputStream.java b/libjava/classpath/javax/sound/sampled/AudioInputStream.java
new file mode 100644
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+++ b/libjava/classpath/javax/sound/sampled/AudioInputStream.java
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+/*
+   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 java.io.IOException;
+import java.io.InputStream;
+
+/**
+ * This is an InputStream which is specialized for reading audio files.
+ * In particular it only allows operations to act on a multiple of
+ * the audio stream's frame size.
+ * @since 1.3
+ */
+public class AudioInputStream extends InputStream
+{
+  /** The format of the audio stream.  */
+  protected AudioFormat format;
+
+  /** The length of the audio stream in frames.  */
+  protected long frameLength;
+
+  /** The current frame position, starting from frame zero.  */
+  protected long framePos;
+
+  /** The size of a frame in bytes.  */
+  protected int frameSize;
+
+  // I wonder why this class doesn't inherit from FilterInputStream.
+  private InputStream input;
+
+  // The saved frame position, used for mark/reset.
+  private long markedFramePos;
+
+  /**
+   * Create a new AudioInputStream given an underlying InputStream,
+   * the audio format, and the length of the data in frames.  The
+   * frame size is taken from the format.
+   * @param is the underlying input stream
+   * @param fmt the format of the data
+   * @param length the length of the data in frames
+   */
+  public AudioInputStream(InputStream is, AudioFormat fmt, long length)
+  {
+    this.format = fmt;
+    this.frameLength = length;
+    this.framePos = 0;
+    this.frameSize = fmt.getFrameSize();
+    this.input = is;
+  }
+
+  /**
+   * Create a new AudioInputStream given a TargetDataLine.  The audio
+   * format and the frame size are taken from the line.
+   * @param line the TargetDataLine
+   */
+  public AudioInputStream(TargetDataLine line)
+  {
+    this(new TargetInputStream(line), line.getFormat(),
+         AudioSystem.NOT_SPECIFIED);
+  }
+
+  /**
+   * Return the number of bytes available to be read from the
+   * underlying stream.  This wrapper method ensures that the result
+   * is always a multiple of the frame size.
+   */
+  public int available() throws IOException
+  {
+    int result = input.available();
+    // Ensure result is a multiple of the frame size.
+    if (frameSize != AudioSystem.NOT_SPECIFIED)
+      result -= result % frameSize;
+    return result;
+  }
+
+  /**
+   * Close the stream.
+   */
+  public void close() throws IOException
+  {
+    input.close();
+  }
+
+  /**
+   * Get the format associated with this stream.
+   * @return the AudioFormat
+   */
+  public AudioFormat getFormat()
+  {
+    return format;
+  }
+
+  /**
+   * Get the length of this stream in frames.  Note that this
+   * may be AudioSystem#NOT_SPECIFIED.
+   * @return the length of the stream in frames
+   */
+  public long getFrameLength()
+  {
+    return frameLength;
+  }
+
+  public void mark(int limit)
+  {
+    input.mark(limit);
+    markedFramePos = framePos;
+  }
+
+  /**
+   * Return true if the underlying stream supports mark and reset,
+   * false otherwise.
+   */
+  public boolean markSupported()
+  {
+    return input.markSupported();
+  }
+
+  /**
+   * Read a single byte from the underlying stream.  If the frame
+   * size is set, and is not one byte, an IOException will be thrown.
+   */
+  public int read() throws IOException
+  {
+    if (frameSize != 1)
+      throw new IOException("frame size must be 1 for read()");
+    int result;
+    if (framePos == frameLength)
+      result = -1;
+    else
+      result = input.read();
+    if (result != -1)
+      ++framePos;
+    return result;
+  }
+
+  public int read(byte[] buf) throws IOException
+  {
+    return read(buf, 0, buf.length);
+  }
+
+  public int read(byte[] buf, int offset, int length) throws IOException
+  {
+    int result;
+    if (framePos == frameLength)
+      result = -1;
+    else
+      {
+        int myFrameSize = (frameSize == AudioSystem.NOT_SPECIFIED
+                           ? 1 : frameSize);
+        // Ensure length is a multiple of frame size.
+        length -= length % myFrameSize;
+
+        result = 0;
+        while (result == 0 || result % myFrameSize != 0)
+          {
+            int val = input.read(buf, offset, length);
+            if (val < 0)
+              {
+                // This is a weird situation as we might have read a
+                // frame already.  It isn't clear at all what to do if
+                // we only found a partial frame.  For now we just
+                // return whatever we did find.
+                if (result == 0)
+                  return -1;
+                result -= result % myFrameSize;
+                break;
+              }
+            result += val;
+          }
+        // assert result % myFrameSize == 0;
+        framePos += result / myFrameSize;
+      }
+    return result;
+  }
+
+  public void reset() throws IOException
+  {
+    input.reset();
+    framePos = markedFramePos;
+  }
+
+  public long skip(long n) throws IOException
+  {
+    if (frameSize != AudioSystem.NOT_SPECIFIED)
+      n -= n % frameSize;
+    long actual = input.skip(n);
+    if (frameSize != AudioSystem.NOT_SPECIFIED)
+      framePos += actual / frameSize;
+    return actual;
+  }
+
+  private static class TargetInputStream extends InputStream
+  {
+    private TargetDataLine line;
+    private byte[] buf;
+
+    /**
+     * Create a new TargetInputStream.
+     * @param line the line to wrap
+     */
+    public TargetInputStream(TargetDataLine line)
+    {
+      this.line = line;
+      // FIXME: do we have to call line.open()?
+    }
+
+    public synchronized int read() throws IOException
+    {
+      if (buf == null)
+        buf = new byte[1];
+      int count = read(buf, 0, 1);
+      if (count < 0)
+        return -1;
+      return buf[0];
+    }
+
+    public int read(byte[] buf, int offset, int length) throws IOException
+    {
+      return line.read(buf, offset, length);
+    }
+  }
+}