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* published by the Free Software Foundation. Oracle designates this
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*
* 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.
*
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package com.sun.media.sound;
import javax.sound.midi.MidiUnavailableException;
import javax.sound.midi.Transmitter;
/**
* MidiInDevice class representing functionality of MidiIn devices.
*
* @author David Rivas
* @author Kara Kytle
* @author Florian Bomers
*/
final class MidiInDevice extends AbstractMidiDevice implements Runnable {
private volatile Thread midiInThread;
MidiInDevice(AbstractMidiDeviceProvider.Info info) {
super(info);
}
// $$kk: 06.24.99: i have this both opening and starting the midi in device.
// may want to separate these??
@Override
protected synchronized void implOpen() throws MidiUnavailableException {
int index = ((MidiInDeviceProvider.MidiInDeviceInfo)getDeviceInfo()).getIndex();
id = nOpen(index); // can throw MidiUnavailableException
if (id == 0) {
throw new MidiUnavailableException("Unable to open native device");
}
// create / start a thread to get messages
if (midiInThread == null) {
midiInThread = JSSecurityManager.createThread(this,
"Java Sound MidiInDevice Thread", // name
false, // daemon
-1, // priority
true); // doStart
}
nStart(id); // can throw MidiUnavailableException
}
// $$kk: 06.24.99: i have this both stopping and closing the midi in device.
// may want to separate these??
@Override
protected synchronized void implClose() {
long oldId = id;
id = 0;
super.implClose();
// close the device
nStop(oldId);
if (midiInThread != null) {
try {
midiInThread.join(1000);
} catch (InterruptedException e) {
// IGNORE EXCEPTION
}
}
nClose(oldId);
}
@Override
public long getMicrosecondPosition() {
long timestamp = -1;
if (isOpen()) {
timestamp = nGetTimeStamp(id);
}
return timestamp;
}
// OVERRIDES OF ABSTRACT MIDI DEVICE METHODS
@Override
protected boolean hasTransmitters() {
return true;
}
@Override
protected Transmitter createTransmitter() {
return new MidiInTransmitter();
}
/**
* An own class to distinguish the class name from
* the transmitter of other devices.
*/
private final class MidiInTransmitter extends BasicTransmitter {
private MidiInTransmitter() {
super();
}
}
@Override
public void run() {
// while the device is started, keep trying to get messages.
// this thread returns from native code whenever stop() or close() is called
while (id!=0) {
// go into native code and retrieve messages
nGetMessages(id);
if (id!=0) {
try {
Thread.sleep(1);
} catch (InterruptedException e) {}
}
}
// let the thread exit
midiInThread = null;
}
/**
* Callback from native code when a short MIDI event is received from hardware.
* @param packedMsg: status | data1 << 8 | data2 << 8
* @param timeStamp time-stamp in microseconds
*/
void callbackShortMessage(int packedMsg, long timeStamp) {
if (packedMsg == 0 || id == 0) {
return;
}
/*if(Printer.verbose) {
int status = packedMsg & 0xFF;
int data1 = (packedMsg & 0xFF00)>>8;
int data2 = (packedMsg & 0xFF0000)>>16;
Printer.verbose(">> MidiInDevice callbackShortMessage: status: " + status + " data1: " + data1 + " data2: " + data2 + " timeStamp: " + timeStamp);
}*/
getTransmitterList().sendMessage(packedMsg, timeStamp);
}
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