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.InvalidMidiDataException; 29 import javax.sound.midi.ShortMessage; 30 31 /** 32 * an optimized ShortMessage that does not need an array. 33 * 34 * @author Florian Bomers 35 */ 36 final class FastShortMessage extends ShortMessage { 37 private int packedMsg; 38 39 FastShortMessage(int packedMsg) throws InvalidMidiDataException { 40 this.packedMsg = packedMsg; 41 getDataLength(packedMsg & 0xFF); // to check for validity 42 } 43 44 /** Creates a FastShortMessage from this ShortMessage */ 45 FastShortMessage(ShortMessage msg) { 46 this.packedMsg = msg.getStatus() 47 | (msg.getData1() << 8) 48 | (msg.getData2() << 16); 49 } 50 51 int getPackedMsg() { 52 return packedMsg; 53 } 54 55 @Override 56 public byte[] getMessage() { 57 int length = 0; 58 try { 59 // fix for bug 4851018: MidiMessage.getLength and .getData return wrong values 60 // fix for bug 4890405: Reading MidiMessage byte array fails in 1.4.2 61 length = getDataLength(packedMsg & 0xFF) + 1; 62 } catch (InvalidMidiDataException imde) { 63 // should never happen 64 } 65 byte[] returnedArray = new byte[length]; 66 if (length>0) { 67 returnedArray[0] = (byte) (packedMsg & 0xFF); 68 if (length>1) { 69 returnedArray[1] = (byte) ((packedMsg & 0xFF00) >> 8); 70 if (length>2) { 71 returnedArray[2] = (byte) ((packedMsg & 0xFF0000) >> 16); 72 } 73 } 74 } 75 return returnedArray; 76 } 77 78 @Override 79 public int getLength() { 80 try { 81 return getDataLength(packedMsg & 0xFF) + 1; 82 } catch (InvalidMidiDataException imde) { 83 // should never happen 84 } 85 return 0; 86 } 87 88 @Override 89 public void setMessage(int status) throws InvalidMidiDataException { 90 // check for valid values 91 int dataLength = getDataLength(status); // can throw InvalidMidiDataException 92 if (dataLength != 0) { 93 super.setMessage(status); // throws Exception 94 } 95 packedMsg = (packedMsg & 0xFFFF00) | (status & 0xFF); 96 } 97 98 @Override 99 public void setMessage(int status, int data1, int data2) throws InvalidMidiDataException { 100 getDataLength(status); // can throw InvalidMidiDataException 101 packedMsg = (status & 0xFF) | ((data1 & 0xFF) << 8) | ((data2 & 0xFF) << 16); 102 } 103 104 @Override 105 public void setMessage(int command, int channel, int data1, int data2) throws InvalidMidiDataException { 106 getDataLength(command); // can throw InvalidMidiDataException 107 packedMsg = (command & 0xF0) | (channel & 0x0F) | ((data1 & 0xFF) << 8) | ((data2 & 0xFF) << 16); 108 } 109 110 @Override 111 public int getChannel() { 112 return packedMsg & 0x0F; 113 } 114 115 @Override 116 public int getCommand() { 117 return packedMsg & 0xF0; 118 } 119 120 @Override 121 public int getData1() { 122 return (packedMsg & 0xFF00) >> 8; 123 } 124 125 @Override 126 public int getData2() { 127 return (packedMsg & 0xFF0000) >> 16; 128 } 129 130 @Override 131 public int getStatus() { 132 return packedMsg & 0xFF; 133 } 134 135 /** 136 * Creates a new object of the same class and with the same contents 137 * as this object. 138 * @return a clone of this instance. 139 */ 140 @Override 141 public Object clone() { 142 try { 143 return new FastShortMessage(packedMsg); 144 } catch (InvalidMidiDataException imde) { 145 // should never happen 146 } 147 return null; 148 } 149 150 } // class FastShortMsg