Source for gnu.javax.sound.midi.alsa.AlsaPortDevice

   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: }