142 lines
4.5 KiB
Java
142 lines
4.5 KiB
Java
/*
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* Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package com.sun.media.sound;
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import javax.sound.midi.*;
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/**
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* an optimized ShortMessage that does not need an array
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*
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* @author Florian Bomers
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*/
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final class FastShortMessage extends ShortMessage {
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private int packedMsg;
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FastShortMessage(int packedMsg) throws InvalidMidiDataException {
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this.packedMsg = packedMsg;
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getDataLength(packedMsg & 0xFF); // to check for validity
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}
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/** Creates a FastShortMessage from this ShortMessage */
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FastShortMessage(ShortMessage msg) {
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this.packedMsg = msg.getStatus()
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| (msg.getData1() << 8)
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| (msg.getData2() << 16);
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}
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int getPackedMsg() {
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return packedMsg;
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}
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public byte[] getMessage() {
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int length = 0;
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try {
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// fix for bug 4851018: MidiMessage.getLength and .getData return wrong values
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// fix for bug 4890405: Reading MidiMessage byte array fails in 1.4.2
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length = getDataLength(packedMsg & 0xFF) + 1;
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} catch (InvalidMidiDataException imde) {
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// should never happen
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}
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byte[] returnedArray = new byte[length];
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if (length>0) {
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returnedArray[0] = (byte) (packedMsg & 0xFF);
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if (length>1) {
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returnedArray[1] = (byte) ((packedMsg & 0xFF00) >> 8);
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if (length>2) {
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returnedArray[2] = (byte) ((packedMsg & 0xFF0000) >> 16);
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}
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}
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}
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return returnedArray;
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}
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public int getLength() {
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try {
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return getDataLength(packedMsg & 0xFF) + 1;
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} catch (InvalidMidiDataException imde) {
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// should never happen
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}
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return 0;
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}
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public void setMessage(int status) throws InvalidMidiDataException {
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// check for valid values
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int dataLength = getDataLength(status); // can throw InvalidMidiDataException
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if (dataLength != 0) {
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super.setMessage(status); // throws Exception
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}
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packedMsg = (packedMsg & 0xFFFF00) | (status & 0xFF);
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}
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public void setMessage(int status, int data1, int data2) throws InvalidMidiDataException {
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getDataLength(status); // can throw InvalidMidiDataException
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packedMsg = (status & 0xFF) | ((data1 & 0xFF) << 8) | ((data2 & 0xFF) << 16);
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}
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public void setMessage(int command, int channel, int data1, int data2) throws InvalidMidiDataException {
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getDataLength(command); // can throw InvalidMidiDataException
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packedMsg = (command & 0xF0) | (channel & 0x0F) | ((data1 & 0xFF) << 8) | ((data2 & 0xFF) << 16);
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}
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public int getChannel() {
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return packedMsg & 0x0F;
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}
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public int getCommand() {
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return packedMsg & 0xF0;
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}
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public int getData1() {
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return (packedMsg & 0xFF00) >> 8;
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}
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public int getData2() {
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return (packedMsg & 0xFF0000) >> 16;
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}
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public int getStatus() {
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return packedMsg & 0xFF;
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}
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/**
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* Creates a new object of the same class and with the same contents
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* as this object.
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* @return a clone of this instance.
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*/
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public Object clone() {
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try {
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return new FastShortMessage(packedMsg);
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} catch (InvalidMidiDataException imde) {
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// should never happen
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}
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return null;
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}
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} // class FastShortMsg
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