gomp-20050608-branch/libjava/classpath/gnu/javax/sound/midi/alsa/AlsaPortDevice.java

   1 /* AlsaPortDevice.java -- ALSA MIDI Port Devices
   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 javax.sound.midi.MidiDevice;
  42 import javax.sound.midi.MidiMessage;
  43 import javax.sound.midi.Receiver;
  44 import javax.sound.midi.Transmitter;
  45
  46 // FIXME: This next import is only rquired for gcj it seems.
  47 import javax.sound.midi.MidiDevice.Info;
  48
  49 import gnu.javax.sound.midi.alsa.AlsaMidiDeviceProvider.AlsaPortInfo;
  50
  51 /**
  52  * ALSA Port Device
  53  *
  54  * @author Anthony Green (green@redhat.com)
  55  *
  56  */
  57 public abstract class AlsaPortDevice implements MidiDevice
  58 {
  59   /**
  60    * The ALSA Receiver class.
  61    *
  62    * @author Anthony Green (green@redhat.com)
  63    *
  64    */
  65   public class AlsaReceiver implements Receiver
  66   {
  67     /* (non-Javadoc)
  68      * @see javax.sound.midi.Receiver#send(javax.sound.midi.MidiMessage, long)
  69      */
  70     public void send(MidiMessage message, long timeStamp)
  71         throws IllegalStateException
  72     {
  73       // TODO Auto-generated method stub
  74
  75     }
  76
  77     /* (non-Javadoc)
  78      * @see javax.sound.midi.Receiver#close()
  79      */
  80     public void close()
  81     {
  82       // TODO Auto-generated method stub
  83
  84     }
  85   }
  86
  87   AlsaMidiDeviceProvider.AlsaPortInfo info;
  88
  89   public AlsaPortDevice (AlsaPortInfo info)
  90   {
  91     this.info = info;
  92   }
  93
  94   public Info getDeviceInfo()
  95   {
  96     return info;
  97   }
  98
  99   native void run_receiver_thread_ (long client, long port, Receiver receiver);
 100
 101   /**
 102    * The ALSA Transmitter class.
 103    *
 104    * @author Anthony Green (green@redhat.com)
 105    *
 106    */
 107   protected class AlsaTransmitter implements Transmitter, Runnable
 108   {
 109     private Receiver receiver;
 110
 111     public void run()
 112     {
 113       run_receiver_thread_ (info.client, info.port, receiver);
 114     }
 115
 116     /* (non-Javadoc)
 117      * @see javax.sound.midi.Transmitter#setReceiver(javax.sound.midi.Receiver)
 118      */
 119     public void setReceiver(Receiver receiver)
 120     {
 121       synchronized (this)
 122       {
 123         this.receiver = receiver;
 124       }
 125
 126       // Create the processing thread
 127       new Thread(this).start();
 128     }
 129
 130     /* (non-Javadoc)
 131      * @see javax.sound.midi.Transmitter#getReceiver()
 132      */
 133     public Receiver getReceiver()
 134     {
 135       synchronized (this)
 136       {
 137         return receiver;
 138       }
 139     }
 140
 141     /* (non-Javadoc)
 142      * @see javax.sound.midi.Transmitter#close()
 143      */
 144     public void close()
 145     {
 146       synchronized (this)
 147       {
 148         receiver.close();
 149         receiver = null;
 150       }
 151     }
 152   }
 153 }