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

   1: /* AlsaPortDevice.java -- ALSA MIDI Port Devices
   2:    Copyright (C) 2005, 2006 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: import gnu.javax.sound.midi.alsa.AlsaMidiDeviceProvider.AlsaPortInfo;
  47: 
  48: /**
  49:  * ALSA Port Device
  50:  *
  51:  * @author Anthony Green (green@redhat.com)
  52:  *
  53:  */
  54: public abstract class AlsaPortDevice implements MidiDevice
  55: {
  56:   /**
  57:    * The ALSA Receiver class.
  58:    *
  59:    * @author Anthony Green (green@redhat.com)
  60:    *
  61:    */
  62:   public class AlsaReceiver implements Receiver
  63:   {
  64:     /* (non-Javadoc)
  65:      * @see javax.sound.midi.Receiver#send(javax.sound.midi.MidiMessage, long)
  66:      */
  67:     public void send(MidiMessage message, long timeStamp)
  68:         throws IllegalStateException
  69:     {
  70:       // TODO Auto-generated method stub
  71: 
  72:     }
  73: 
  74:     /* (non-Javadoc)
  75:      * @see javax.sound.midi.Receiver#close()
  76:      */
  77:     public void close()
  78:     {
  79:       // TODO Auto-generated method stub
  80: 
  81:     }
  82:   }
  83: 
  84:   AlsaMidiDeviceProvider.AlsaPortInfo info;
  85: 
  86:   public AlsaPortDevice (AlsaPortInfo info)
  87:   {
  88:     this.info = info;
  89:   }
  90: 
  91:   public Info getDeviceInfo()
  92:   {
  93:     return info;
  94:   }
  95: 
  96:   native void run_receiver_thread_ (long client, long port, Receiver receiver);
  97: 
  98:   /**
  99:    * The ALSA Transmitter class.
 100:    *
 101:    * @author Anthony Green (green@redhat.com)
 102:    *
 103:    */
 104:   protected class AlsaTransmitter implements Transmitter, Runnable
 105:   {
 106:     private Receiver receiver;
 107: 
 108:     public void run()
 109:     {
 110:       run_receiver_thread_ (info.client, info.port, receiver);
 111:     }
 112: 
 113:     /* (non-Javadoc)
 114:      * @see javax.sound.midi.Transmitter#setReceiver(javax.sound.midi.Receiver)
 115:      */
 116:     public void setReceiver(Receiver receiver)
 117:     {
 118:       synchronized (this)
 119:       {
 120:         this.receiver = receiver;
 121:       }
 122: 
 123:       // Create the processing thread
 124:       new Thread(this).start();
 125:     }
 126: 
 127:     /* (non-Javadoc)
 128:      * @see javax.sound.midi.Transmitter#getReceiver()
 129:      */
 130:     public Receiver getReceiver()
 131:     {
 132:       synchronized (this)
 133:       {
 134:         return receiver;
 135:       }
 136:     }
 137: 
 138:     /* (non-Javadoc)
 139:      * @see javax.sound.midi.Transmitter#close()
 140:      */
 141:     public void close()
 142:     {
 143:       synchronized (this)
 144:       {
 145:         receiver.close();
 146:         receiver = null;
 147:       }
 148:     }
 149:   }
 150: }