1/* 2 * Copyright (c) 1999, 2016, 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 26package com.sun.media.sound; 27 28import javax.sound.midi.MidiUnavailableException; 29import javax.sound.midi.Transmitter; 30 31/** 32 * MidiInDevice class representing functionality of MidiIn devices. 33 * 34 * @author David Rivas 35 * @author Kara Kytle 36 * @author Florian Bomers 37 */ 38final class MidiInDevice extends AbstractMidiDevice implements Runnable { 39 40 private volatile Thread midiInThread; 41 42 MidiInDevice(AbstractMidiDeviceProvider.Info info) { 43 super(info); 44 if(Printer.trace) Printer.trace("MidiInDevice CONSTRUCTOR"); 45 } 46 47 // $$kk: 06.24.99: i have this both opening and starting the midi in device. 48 // may want to separate these?? 49 @Override 50 protected synchronized void implOpen() throws MidiUnavailableException { 51 if (Printer.trace) Printer.trace("> MidiInDevice: implOpen()"); 52 53 int index = ((MidiInDeviceProvider.MidiInDeviceInfo)getDeviceInfo()).getIndex(); 54 id = nOpen(index); // can throw MidiUnavailableException 55 56 if (id == 0) { 57 throw new MidiUnavailableException("Unable to open native device"); 58 } 59 60 // create / start a thread to get messages 61 if (midiInThread == null) { 62 midiInThread = JSSecurityManager.createThread(this, 63 "Java Sound MidiInDevice Thread", // name 64 false, // daemon 65 -1, // priority 66 true); // doStart 67 } 68 69 nStart(id); // can throw MidiUnavailableException 70 if (Printer.trace) Printer.trace("< MidiInDevice: implOpen() completed"); 71 } 72 73 // $$kk: 06.24.99: i have this both stopping and closing the midi in device. 74 // may want to separate these?? 75 @Override 76 protected synchronized void implClose() { 77 if (Printer.trace) Printer.trace("> MidiInDevice: implClose()"); 78 long oldId = id; 79 id = 0; 80 81 super.implClose(); 82 83 // close the device 84 nStop(oldId); 85 if (midiInThread != null) { 86 try { 87 midiInThread.join(1000); 88 } catch (InterruptedException e) { 89 // IGNORE EXCEPTION 90 } 91 } 92 nClose(oldId); 93 if (Printer.trace) Printer.trace("< MidiInDevice: implClose() completed"); 94 } 95 96 @Override 97 public long getMicrosecondPosition() { 98 long timestamp = -1; 99 if (isOpen()) { 100 timestamp = nGetTimeStamp(id); 101 } 102 return timestamp; 103 } 104 105 // OVERRIDES OF ABSTRACT MIDI DEVICE METHODS 106 107 @Override 108 protected boolean hasTransmitters() { 109 return true; 110 } 111 112 @Override 113 protected Transmitter createTransmitter() { 114 return new MidiInTransmitter(); 115 } 116 117 /** 118 * An own class to distinguish the class name from 119 * the transmitter of other devices. 120 */ 121 private final class MidiInTransmitter extends BasicTransmitter { 122 private MidiInTransmitter() { 123 super(); 124 } 125 } 126 127 @Override 128 public void run() { 129 // while the device is started, keep trying to get messages. 130 // this thread returns from native code whenever stop() or close() is called 131 while (id!=0) { 132 // go into native code and retrieve messages 133 nGetMessages(id); 134 if (id!=0) { 135 try { 136 Thread.sleep(1); 137 } catch (InterruptedException e) {} 138 } 139 } 140 if(Printer.verbose) Printer.verbose("MidiInDevice Thread exit"); 141 // let the thread exit 142 midiInThread = null; 143 } 144 145 /** 146 * Callback from native code when a short MIDI event is received from hardware. 147 * @param packedMsg: status | data1 << 8 | data2 << 8 148 * @param timeStamp time-stamp in microseconds 149 */ 150 void callbackShortMessage(int packedMsg, long timeStamp) { 151 if (packedMsg == 0 || id == 0) { 152 return; 153 } 154 155 /*if(Printer.verbose) { 156 int status = packedMsg & 0xFF; 157 int data1 = (packedMsg & 0xFF00)>>8; 158 int data2 = (packedMsg & 0xFF0000)>>16; 159 Printer.verbose(">> MidiInDevice callbackShortMessage: status: " + status + " data1: " + data1 + " data2: " + data2 + " timeStamp: " + timeStamp); 160 }*/ 161 162 getTransmitterList().sendMessage(packedMsg, timeStamp); 163 } 164 165 void callbackLongMessage(byte[] data, long timeStamp) { 166 if (id == 0 || data == null) { 167 return; 168 } 169 getTransmitterList().sendMessage(data, timeStamp); 170 } 171 172 private native long nOpen(int index) throws MidiUnavailableException; 173 private native void nClose(long id); 174 175 private native void nStart(long id) throws MidiUnavailableException; 176 private native void nStop(long id); 177 private native long nGetTimeStamp(long id); 178 179 // go into native code and get messages. May be blocking 180 private native void nGetMessages(long id); 181} 182