1 /*
2 * Copyright (c) 1999, 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
32 /**
33 * MidiOutDevice class representing functionality of MidiOut devices.
34 *
35 * @author David Rivas
36 * @author Kara Kytle
37 * @author Florian Bomers
38 */
39 final class MidiOutDevice extends AbstractMidiDevice {
40
41 // CONSTRUCTOR
42
43 MidiOutDevice(AbstractMidiDeviceProvider.Info info) {
44 super(info);
45 if(Printer.trace) Printer.trace("MidiOutDevice CONSTRUCTOR");
46 }
47
48
49 // IMPLEMENTATION OF ABSTRACT MIDI DEVICE METHODS
50
51 protected synchronized void implOpen() throws MidiUnavailableException {
52 if (Printer.trace) Printer.trace("> MidiOutDevice: implOpen()");
53 int index = ((AbstractMidiDeviceProvider.Info)getDeviceInfo()).getIndex();
54 id = nOpen(index); // can throw MidiUnavailableException
55 if (id == 0) {
56 throw new MidiUnavailableException("Unable to open native device");
57 }
58 if (Printer.trace) Printer.trace("< MidiOutDevice: implOpen(): completed.");
59 }
60
61
62 protected synchronized void implClose() {
63 if (Printer.trace) Printer.trace("> MidiOutDevice: implClose()");
64 // prevent further action
65 long oldId = id;
66 id = 0;
67
68 super.implClose();
69
70 // close the device
71 nClose(oldId);
72 if (Printer.trace) Printer.trace("< MidiOutDevice: implClose(): completed");
73 }
74
75
76 public long getMicrosecondPosition() {
77 long timestamp = -1;
78 if (isOpen()) {
79 timestamp = nGetTimeStamp(id);
80 }
81 return timestamp;
82 }
83
84
85
86 // OVERRIDES OF ABSTRACT MIDI DEVICE METHODS
87
88 /** Returns if this device supports Receivers.
89 This implementation always returns true.
90 @return true, if the device supports Receivers, false otherwise.
91 */
92 protected boolean hasReceivers() {
93 return true;
94 }
95
96
97 protected Receiver createReceiver() {
98 return new MidiOutReceiver();
99 }
100
101
102 // INNER CLASSES
103
104 final class MidiOutReceiver extends AbstractReceiver {
105
106 void implSend(final MidiMessage message, final long timeStamp) {
107 final int length = message.getLength();
108 final int status = message.getStatus();
109 if (length <= 3 && status != 0xF0 && status != 0xF7) {
110 int packedMsg;
111 if (message instanceof ShortMessage) {
112 if (message instanceof FastShortMessage) {
113 packedMsg = ((FastShortMessage) message).getPackedMsg();
114 } else {
115 ShortMessage msg = (ShortMessage) message;
116 packedMsg = (status & 0xFF)
117 | ((msg.getData1() & 0xFF) << 8)
118 | ((msg.getData2() & 0xFF) << 16);
119 }
120 } else {
121 packedMsg = 0;
122 byte[] data = message.getMessage();
123 if (length>0) {
124 packedMsg = data[0] & 0xFF;
125 if (length>1) {
126 /* We handle meta messages here. The message
127 system reset (FF) doesn't get until here,
128 because it's length is only 1. So if we see
129 a status byte of FF, it's sure that we
130 have a Meta message. */
131 if (status == 0xFF) {
132 return;
133 }
134 packedMsg |= (data[1] & 0xFF) << 8;
135 if (length>2) {
136 packedMsg |= (data[2] & 0xFF) << 16;
137 }
138 }
139 }
140 }
141 nSendShortMessage(id, packedMsg, timeStamp);
142 } else {
143 final byte[] data;
144 if (message instanceof FastSysexMessage) {
145 data = ((FastSysexMessage) message).getReadOnlyMessage();
146 } else {
147 data = message.getMessage();
148 }
149 final int dataLength = Math.min(length, data.length);
150 if (dataLength > 0) {
151 nSendLongMessage(id, data, dataLength, timeStamp);
152 }
153 }
154 }
155
156 /** shortcut for the Sun implementation */
157 synchronized void sendPackedMidiMessage(int packedMsg, long timeStamp) {
158 if (isOpen() && id != 0) {
159 nSendShortMessage(id, packedMsg, timeStamp);
160 }
161 }
162
163
164 } // class MidiOutReceiver
165
166
167 // NATIVE METHODS
168
169 private native long nOpen(int index) throws MidiUnavailableException;
170 private native void nClose(long id);
171
172 private native void nSendShortMessage(long id, int packedMsg, long timeStamp);
173 private native void nSendLongMessage(long id, byte[] data, int size, long timeStamp);
174 private native long nGetTimeStamp(long id);
175
176 } // class MidiOutDevice