/* * Copyright (c) 2002, 2007, Oracle and/or its affiliates. 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.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.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