| 1 | /* AlsaMidiDeviceProvider.java -- The ALSA MIDI Device Provider |
| 2 | Copyright (C) 2005 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GNU Classpath. |
| 5 | |
| 6 | GNU Classpath is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2, or (at your option) |
| 9 | any later version. |
| 10 | |
| 11 | GNU Classpath is distributed in the hope that it will be useful, but |
| 12 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with GNU Classpath; see the file COPYING. If not, write to the |
| 18 | Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 19 | 02110-1301 USA. |
| 20 | |
| 21 | Linking this library statically or dynamically with other modules is |
| 22 | making a combined work based on this library. Thus, the terms and |
| 23 | conditions of the GNU General Public License cover the whole |
| 24 | combination. |
| 25 | |
| 26 | As a special exception, the copyright holders of this library give you |
| 27 | permission to link this library with independent modules to produce an |
| 28 | executable, regardless of the license terms of these independent |
| 29 | modules, and to copy and distribute the resulting executable under |
| 30 | terms of your choice, provided that you also meet, for each linked |
| 31 | independent module, the terms and conditions of the license of that |
| 32 | module. An independent module is a module which is not derived from |
| 33 | or based on this library. If you modify this library, you may extend |
| 34 | this exception to your version of the library, but you are not |
| 35 | obligated to do so. If you do not wish to do so, delete this |
| 36 | exception statement from your version. */ |
| 37 | |
| 38 | |
| 39 | package gnu.javax.sound.midi.alsa; |
| 40 | |
| 41 | import gnu.classpath.Configuration; |
| 42 | |
| 43 | import javax.sound.midi.MidiDevice; |
| 44 | import javax.sound.midi.MidiDevice.Info; |
| 45 | import javax.sound.midi.spi.MidiDeviceProvider; |
| 46 | |
| 47 | /** |
| 48 | * Provide ALSA MIDI devices. |
| 49 | * |
| 50 | * @author Anthony Green (green@redhat.com) |
| 51 | * |
| 52 | */ |
| 53 | public class AlsaMidiDeviceProvider extends MidiDeviceProvider |
| 54 | { |
| 55 | /** |
| 56 | * Abstract base for ALSA specific MIDI device info. |
| 57 | * |
| 58 | * @author Anthony Green (green@redhat.com) |
| 59 | * |
| 60 | */ |
| 61 | private static abstract class AlsaInfo extends Info |
| 62 | { |
| 63 | /** |
| 64 | * Create an ALSA specific MIDI device info object. |
| 65 | * |
| 66 | * @param name the device name |
| 67 | * @param description the device description |
| 68 | */ |
| 69 | public AlsaInfo(String name, String description) |
| 70 | { |
| 71 | super(name, "Alsa", description, "0.0"); |
| 72 | } |
| 73 | |
| 74 | abstract MidiDevice getDevice (); |
| 75 | } |
| 76 | |
| 77 | /** |
| 78 | * ALSA MIDI Port. |
| 79 | * |
| 80 | * @author Anthony Green (green@redhat.com) |
| 81 | * |
| 82 | */ |
| 83 | public static abstract class AlsaPortInfo extends AlsaInfo |
| 84 | { |
| 85 | long client; |
| 86 | long port; |
| 87 | |
| 88 | /** |
| 89 | * Create ALSA MIDI In Port. |
| 90 | * |
| 91 | * @param name the device name |
| 92 | * @param description the device description |
| 93 | * @param client the client ID |
| 94 | * @param port the port ID |
| 95 | */ |
| 96 | public AlsaPortInfo(String name, String description, long client, long port) |
| 97 | { |
| 98 | super(name, description); |
| 99 | this.client = client; |
| 100 | this.port = port; |
| 101 | } |
| 102 | } |
| 103 | |
| 104 | /** |
| 105 | * ALSA Sequencer specific info. |
| 106 | * |
| 107 | * @author Anthony Green (green@redhat.com) |
| 108 | * |
| 109 | */ |
| 110 | private static class AlsaSequencerInfo extends AlsaInfo |
| 111 | { |
| 112 | public AlsaSequencerInfo(String name, String description) |
| 113 | { |
| 114 | super(name, description); |
| 115 | } |
| 116 | |
| 117 | MidiDevice getDevice() |
| 118 | { |
| 119 | return AlsaMidiSequencerDevice.getInstance(); |
| 120 | } |
| 121 | } |
| 122 | |
| 123 | /** |
| 124 | * ALSA MIDI In Port. |
| 125 | * |
| 126 | * @author Anthony Green (green@redhat.com) |
| 127 | * |
| 128 | */ |
| 129 | private static class AlsaInputPortInfo extends AlsaPortInfo |
| 130 | { |
| 131 | public AlsaInputPortInfo(String name, String description, long client, long port) |
| 132 | { |
| 133 | super(name, description, client, port); |
| 134 | } |
| 135 | |
| 136 | MidiDevice getDevice() |
| 137 | { |
| 138 | return new AlsaInputPortDevice(this); |
| 139 | } |
| 140 | } |
| 141 | |
| 142 | /** |
| 143 | * ALSA MIDI Out Port. |
| 144 | * |
| 145 | * @author Anthony Green (green@redhat.com) |
| 146 | * |
| 147 | */ |
| 148 | private static class AlsaOutputPortInfo extends AlsaPortInfo |
| 149 | { |
| 150 | public AlsaOutputPortInfo(String name, String description, long client, long port) |
| 151 | { |
| 152 | super(name, description, client, port); |
| 153 | } |
| 154 | |
| 155 | MidiDevice getDevice() |
| 156 | { |
| 157 | return new AlsaOutputPortDevice(this); |
| 158 | } |
| 159 | } |
| 160 | |
| 161 | private static AlsaInfo[] infos; |
| 162 | |
| 163 | private static native AlsaInfo[] getInputDeviceInfo_(); |
| 164 | private static native AlsaInfo[] getOutputDeviceInfo_(); |
| 165 | |
| 166 | /** |
| 167 | * Initialize the ALSA system |
| 168 | */ |
| 169 | private static native void init_(); |
| 170 | |
| 171 | static |
| 172 | { |
| 173 | if (Configuration.INIT_LOAD_LIBRARY) |
| 174 | { |
| 175 | System.loadLibrary("gjsmalsa"); |
| 176 | } |
| 177 | |
| 178 | init_(); |
| 179 | |
| 180 | AlsaInfo inputs[] = getInputDeviceInfo_(); |
| 181 | AlsaInfo outputs[] = getOutputDeviceInfo_(); |
| 182 | |
| 183 | infos = new AlsaInfo[inputs.length + outputs.length + 1]; |
| 184 | infos[0] = new AlsaSequencerInfo ("/dev/snd/seq", "ALSA Sequencer"); |
| 185 | System.arraycopy(inputs, 0, infos, 1, inputs.length); |
| 186 | System.arraycopy(outputs, 0, infos, 1 + inputs.length, outputs.length); |
| 187 | } |
| 188 | |
| 189 | public AlsaMidiDeviceProvider() |
| 190 | { |
| 191 | // Nothing. |
| 192 | } |
| 193 | |
| 194 | /* (non-Javadoc) |
| 195 | * @see javax.sound.midi.spi.MidiDeviceProvider#getDeviceInfo() |
| 196 | */ |
| 197 | public Info[] getDeviceInfo() |
| 198 | { |
| 199 | return infos; |
| 200 | } |
| 201 | |
| 202 | /* (non-Javadoc) |
| 203 | * @see javax.sound.midi.spi.MidiDeviceProvider#getDevice(javax.sound.midi.MidiDevice.Info) |
| 204 | */ |
| 205 | public MidiDevice getDevice(Info info) |
| 206 | { |
| 207 | for (int i = 0; i < infos.length; i++) |
| 208 | { |
| 209 | if (info.equals(infos[i])) |
| 210 | { |
| 211 | return infos[i].getDevice(); |
| 212 | } |
| 213 | } |
| 214 | throw new IllegalArgumentException("Don't recognize MIDI device " + info); |
| 215 | } |
| 216 | } |