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8  * particular file as subject to the "Classpath" exception as provided
9  * by Oracle in the LICENSE file that accompanied this code.
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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).
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25 
26 package com.sun.media.sound;
27 
28 import java.util.TreeMap;
29 
30 import javax.sound.midi.MidiDevice;
31 import javax.sound.midi.MidiDeviceReceiver;
32 import javax.sound.midi.MidiMessage;
33 import javax.sound.midi.ShortMessage;
34 
35 /**
36  * Software synthesizer MIDI receiver class.
37  *
38  * @author Karl Helgason
39  */
40 public final class SoftReceiver implements MidiDeviceReceiver {
41 
42     boolean open = true;
43     private final Object control_mutex;
44     private final SoftSynthesizer synth;
45     TreeMap<Long, Object> midimessages;
46     SoftMainMixer mainmixer;
47 
SoftReceiver(SoftSynthesizer synth)48     public SoftReceiver(SoftSynthesizer synth) {
49         this.control_mutex = synth.control_mutex;
50         this.synth = synth;
51         this.mainmixer = synth.getMainMixer();
52         if (mainmixer != null)
53             this.midimessages = mainmixer.midimessages;
54     }
55 
56     @Override
getMidiDevice()57     public MidiDevice getMidiDevice() {
58         return synth;
59     }
60 
61     @Override
send(MidiMessage message, long timeStamp)62     public void send(MidiMessage message, long timeStamp) {
63 
64         synchronized (control_mutex) {
65             if (!open)
66                 throw new IllegalStateException("Receiver is not open");
67         }
68 
69         if (timeStamp != -1) {
70             synchronized (control_mutex) {
71                 mainmixer.activity();
72                 while (midimessages.get(timeStamp) != null)
73                     timeStamp++;
74                 if (message instanceof ShortMessage
75                         && (((ShortMessage)message).getChannel() > 0xF)) {
76                     midimessages.put(timeStamp, message.clone());
77                 } else {
78                     midimessages.put(timeStamp, message.getMessage());
79                 }
80             }
81         } else {
82             mainmixer.processMessage(message);
83         }
84     }
85 
86     @Override
close()87     public void close() {
88         synchronized (control_mutex) {
89             open = false;
90         }
91         synth.removeReceiver(this);
92     }
93 }
94