1 /* 2 * Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package com.sun.media.sound; 27 28 import javax.sound.midi.*; 29 30 /** 31 * an optimized ShortMessage that does not need an array 32 * 33 * @author Florian Bomers 34 */ 35 final class FastShortMessage extends ShortMessage { 36 private int packedMsg; 37 38 FastShortMessage(int packedMsg) throws InvalidMidiDataException { 39 this.packedMsg = packedMsg; 40 getDataLength(packedMsg & 0xFF); // to check for validity 41 } 42 43 /** Creates a FastShortMessage from this ShortMessage */ 44 FastShortMessage(ShortMessage msg) { 45 this.packedMsg = msg.getStatus() 46 | (msg.getData1() << 8) 47 | (msg.getData2() << 16); 48 } 49 50 int getPackedMsg() { 51 return packedMsg; 52 } 53 54 public byte[] getMessage() { 55 int length = 0; 56 try { 57 // fix for bug 4851018: MidiMessage.getLength and .getData return wrong values 58 // fix for bug 4890405: Reading MidiMessage byte array fails in 1.4.2 59 length = getDataLength(packedMsg & 0xFF) + 1; 60 } catch (InvalidMidiDataException imde) { 61 // should never happen 62 } 63 byte[] returnedArray = new byte[length]; 64 if (length>0) { 65 returnedArray[0] = (byte) (packedMsg & 0xFF); 66 if (length>1) { 67 returnedArray[1] = (byte) ((packedMsg & 0xFF00) >> 8); 68 if (length>2) { 69 returnedArray[2] = (byte) ((packedMsg & 0xFF0000) >> 16); 70 } 71 } 72 } 73 return returnedArray; 74 } 75 76 public int getLength() { 77 try { 78 return getDataLength(packedMsg & 0xFF) + 1; 79 } catch (InvalidMidiDataException imde) { 80 // should never happen 81 } 82 return 0; 83 } 84 85 public void setMessage(int status) throws InvalidMidiDataException { 86 // check for valid values 87 int dataLength = getDataLength(status); // can throw InvalidMidiDataException 88 if (dataLength != 0) { 89 super.setMessage(status); // throws Exception 90 } 91 packedMsg = (packedMsg & 0xFFFF00) | (status & 0xFF); 92 } 93 94 95 public void setMessage(int status, int data1, int data2) throws InvalidMidiDataException { 96 getDataLength(status); // can throw InvalidMidiDataException 97 packedMsg = (status & 0xFF) | ((data1 & 0xFF) << 8) | ((data2 & 0xFF) << 16); 98 } 99 100 101 public void setMessage(int command, int channel, int data1, int data2) throws InvalidMidiDataException { 102 getDataLength(command); // can throw InvalidMidiDataException 103 packedMsg = (command & 0xF0) | (channel & 0x0F) | ((data1 & 0xFF) << 8) | ((data2 & 0xFF) << 16); 104 } 105 106 107 public int getChannel() { 108 return packedMsg & 0x0F; 109 } 110 111 public int getCommand() { 112 return packedMsg & 0xF0; 113 } 114 115 public int getData1() { 116 return (packedMsg & 0xFF00) >> 8; 117 } 118 119 public int getData2() { 120 return (packedMsg & 0xFF0000) >> 16; 121 } 122 123 public int getStatus() { 124 return packedMsg & 0xFF; 125 } 126 127 /** 128 * Creates a new object of the same class and with the same contents 129 * as this object. 130 * @return a clone of this instance. 131 */ 132 public Object clone() { 133 try { 134 return new FastShortMessage(packedMsg); 135 } catch (InvalidMidiDataException imde) { 136 // should never happen 137 } 138 return null; 139 } 140 141 } // class FastShortMsg