127 lines
4.3 KiB
Java
127 lines
4.3 KiB
Java
/*
|
|
* Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
|
|
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
|
*
|
|
* This code is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 only, as
|
|
* published by the Free Software Foundation. Oracle designates this
|
|
* particular file as subject to the "Classpath" exception as provided
|
|
* by Oracle in the LICENSE file that accompanied this code.
|
|
*
|
|
* This code is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
* version 2 for more details (a copy is included in the LICENSE file that
|
|
* accompanied this code).
|
|
*
|
|
* You should have received a copy of the GNU General Public License version
|
|
* 2 along with this work; if not, write to the Free Software Foundation,
|
|
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
|
|
* or visit www.oracle.com if you need additional information or have any
|
|
* questions.
|
|
*/
|
|
|
|
package com.sun.media.sound;
|
|
|
|
import javax.sound.midi.MidiDevice;
|
|
|
|
|
|
/**
|
|
* MIDI input device provider.
|
|
*
|
|
* @author Kara Kytle
|
|
* @author Florian Bomers
|
|
*/
|
|
public final class MidiInDeviceProvider extends AbstractMidiDeviceProvider {
|
|
|
|
/** Cache of info objects for all MIDI output devices on the system. */
|
|
private static Info[] infos = null;
|
|
|
|
/** Cache of open MIDI input devices on the system. */
|
|
private static MidiDevice[] devices = null;
|
|
|
|
private static final boolean enabled;
|
|
|
|
// STATIC
|
|
|
|
static {
|
|
// initialize
|
|
Platform.initialize();
|
|
enabled = Platform.isMidiIOEnabled();
|
|
}
|
|
|
|
// CONSTRUCTOR
|
|
|
|
/**
|
|
* Required public no-arg constructor.
|
|
*/
|
|
public MidiInDeviceProvider() {
|
|
if (Printer.trace) Printer.trace("MidiInDeviceProvider: constructor");
|
|
}
|
|
|
|
// implementation of abstract methods in AbstractMidiDeviceProvider
|
|
|
|
AbstractMidiDeviceProvider.Info createInfo(int index) {
|
|
if (!enabled) {
|
|
return null;
|
|
}
|
|
return new MidiInDeviceInfo(index, MidiInDeviceProvider.class);
|
|
}
|
|
|
|
MidiDevice createDevice(AbstractMidiDeviceProvider.Info info) {
|
|
if (enabled && (info instanceof MidiInDeviceInfo)) {
|
|
return new MidiInDevice(info);
|
|
}
|
|
return null;
|
|
}
|
|
|
|
int getNumDevices() {
|
|
if (!enabled) {
|
|
if (Printer.debug)Printer.debug("MidiInDevice not enabled, returning 0 devices");
|
|
return 0;
|
|
}
|
|
int numDevices = nGetNumDevices();
|
|
if (Printer.debug)Printer.debug("MidiInDeviceProvider.getNumDevices(): devices: " + numDevices);
|
|
return numDevices;
|
|
}
|
|
|
|
MidiDevice[] getDeviceCache() { return devices; }
|
|
void setDeviceCache(MidiDevice[] devices) { this.devices = devices; }
|
|
Info[] getInfoCache() { return infos; }
|
|
void setInfoCache(Info[] infos) { this.infos = infos; }
|
|
|
|
|
|
// INNER CLASSES
|
|
|
|
/**
|
|
* Info class for MidiInDevices. Adds the
|
|
* provider's Class to keep the provider class from being
|
|
* unloaded. Otherwise, at least on JDK1.1.7 and 1.1.8,
|
|
* the provider class can be unloaded. Then, then the provider
|
|
* is next invoked, the static block is executed again and a new
|
|
* instance of the device object is created. Even though the
|
|
* previous instance may still exist and be open / in use / etc.,
|
|
* the new instance will not reflect that state...
|
|
*/
|
|
static final class MidiInDeviceInfo extends AbstractMidiDeviceProvider.Info {
|
|
private final Class providerClass;
|
|
|
|
private MidiInDeviceInfo(int index, Class providerClass) {
|
|
super(nGetName(index), nGetVendor(index), nGetDescription(index), nGetVersion(index), index);
|
|
this.providerClass = providerClass;
|
|
}
|
|
|
|
} // class MidiInDeviceInfo
|
|
|
|
|
|
// NATIVE METHODS
|
|
|
|
private static native int nGetNumDevices();
|
|
private static native String nGetName(int index);
|
|
private static native String nGetVendor(int index);
|
|
private static native String nGetDescription(int index);
|
|
private static native String nGetVersion(int index);
|
|
}
|