--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/com/sun/media/sound/FastShortMessage.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,141 @@
+/*
+ * Copyright 2002-2007 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package com.sun.media.sound;
+
+import javax.sound.midi.*;
+
+/**
+ * an optimized ShortMessage that does not need an array
+ *
+ * @author Florian Bomers
+ */
+class FastShortMessage extends ShortMessage {
+    private int packedMsg;
+
+    public FastShortMessage(int packedMsg) throws InvalidMidiDataException {
+        this.packedMsg = packedMsg;
+        getDataLength(packedMsg & 0xFF); // to check for validity
+    }
+
+    /** Creates a FastShortMessage from this ShortMessage */
+    public FastShortMessage(ShortMessage msg) {
+        this.packedMsg = msg.getStatus()
+            | (msg.getData1() << 8)
+            | (msg.getData2() << 16);
+    }
+
+    int getPackedMsg() {
+        return packedMsg;
+    }
+
+    public byte[] getMessage() {
+        int length = 0;
+        try {
+            // fix for bug 4851018: MidiMessage.getLength and .getData return wrong values
+            // fix for bug 4890405: Reading MidiMessage byte array fails in 1.4.2
+            length = getDataLength(packedMsg & 0xFF) + 1;
+        } catch (InvalidMidiDataException imde) {
+            // should never happen
+        }
+        byte[] returnedArray = new byte[length];
+        if (length>0) {
+            returnedArray[0] = (byte) (packedMsg & 0xFF);
+            if (length>1) {
+                returnedArray[1] = (byte) ((packedMsg & 0xFF00) >> 8);
+                if (length>2) {
+                    returnedArray[2] = (byte) ((packedMsg & 0xFF0000) >> 16);
+                }
+            }
+        }
+        return returnedArray;
+    }
+
+    public int getLength() {
+        try {
+            return getDataLength(packedMsg & 0xFF) + 1;
+        } catch (InvalidMidiDataException imde) {
+            // should never happen
+        }
+        return 0;
+    }
+
+    public void setMessage(int status) throws InvalidMidiDataException {
+        // check for valid values
+        int dataLength = getDataLength(status); // can throw InvalidMidiDataException
+        if (dataLength != 0) {
+            super.setMessage(status); // throws Exception
+        }
+        packedMsg = (packedMsg & 0xFFFF00) | (status & 0xFF);
+    }
+
+
+    public void setMessage(int status, int data1, int data2) throws InvalidMidiDataException {
+        getDataLength(status); // can throw InvalidMidiDataException
+        packedMsg = (status & 0xFF) | ((data1 & 0xFF) << 8) | ((data2 & 0xFF) << 16);
+    }
+
+
+    public void setMessage(int command, int channel, int data1, int data2) throws InvalidMidiDataException {
+        getDataLength(command); // can throw InvalidMidiDataException
+        packedMsg = (command & 0xF0) | (channel & 0x0F) | ((data1 & 0xFF) << 8) | ((data2 & 0xFF) << 16);
+    }
+
+
+    public int getChannel() {
+        return packedMsg & 0x0F;
+    }
+
+    public int getCommand() {
+        return packedMsg & 0xF0;
+    }
+
+    public int getData1() {
+        return (packedMsg & 0xFF00) >> 8;
+    }
+
+    public int getData2() {
+        return (packedMsg & 0xFF0000) >> 16;
+    }
+
+    public int getStatus() {
+        return packedMsg & 0xFF;
+    }
+
+    /**
+     * Creates a new object of the same class and with the same contents
+     * as this object.
+     * @return a clone of this instance.
+     */
+    public Object clone() {
+        try {
+            return new FastShortMessage(packedMsg);
+        } catch (InvalidMidiDataException imde) {
+            // should never happen
+        }
+        return null;
+    }
+
+} // class FastShortMsg