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    1   /*
    2    * Copyright (c) 2007, 2010, 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   package com.sun.media.sound;
   26   
   27   import java.util.TreeMap;
   28   
   29   import javax.sound.midi.MidiDevice;
   30   import javax.sound.midi.MidiDeviceReceiver;
   31   import javax.sound.midi.MidiMessage;
   32   import javax.sound.midi.ShortMessage;
   33   
   34   /**
   35    * Software synthesizer MIDI receiver class.
   36    *
   37    * @author Karl Helgason
   38    */
   39   public class SoftReceiver implements MidiDeviceReceiver {
   40   
   41       protected boolean open = true;
   42       private Object control_mutex;
   43       private SoftSynthesizer synth;
   44       protected TreeMap<Long, Object> midimessages;
   45       protected SoftMainMixer mainmixer;
   46   
   47       public SoftReceiver(SoftSynthesizer synth) {
   48           this.control_mutex = synth.control_mutex;
   49           this.synth = synth;
   50           this.mainmixer = synth.getMainMixer();
   51           if (mainmixer != null)
   52               this.midimessages = mainmixer.midimessages;
   53       }
   54   
   55       public MidiDevice getMidiDevice() {
   56           return synth;
   57       }
   58   
   59       public void send(MidiMessage message, long timeStamp) {
   60   
   61           synchronized (control_mutex) {
   62               if (!open)
   63                   throw new IllegalStateException("Receiver is not open");
   64           }
   65   
   66           if (timeStamp != -1) {
   67               synchronized (control_mutex) {
   68                   mainmixer.activity();
   69                   while (midimessages.get(timeStamp) != null)
   70                       timeStamp++;
   71                   if (message instanceof ShortMessage
   72                           && (((ShortMessage)message).getChannel() > 0xF)) {
   73                       midimessages.put(timeStamp, message.clone());
   74                   } else {
   75                       midimessages.put(timeStamp, message.getMessage());
   76                   }
   77               }
   78           } else {
   79               mainmixer.processMessage(message);
   80           }
   81       }
   82   
   83       public void close() {
   84           synchronized (control_mutex) {
   85               open = false;
   86           }
   87           synth.removeReceiver(this);
   88       }
   89   }

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