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    1   /*
    2    * Copyright (c) 2002, 2007, 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   
   26   package com.sun.media.sound;
   27   
   28   import java.util.Vector;
   29   
   30   import javax.sound.sampled.Mixer;
   31   import javax.sound.sampled.spi.MixerProvider;
   32   
   33   
   34   /**
   35    * Port provider.
   36    *
   37    * @author Florian Bomers
   38    */
   39   public class PortMixerProvider extends MixerProvider {
   40   
   41       // STATIC VARIABLES
   42   
   43       /**
   44        * Set of info objects for all port input devices on the system.
   45        */
   46       private static PortMixerInfo[] infos;
   47   
   48       /**
   49        * Set of all port input devices on the system.
   50        */
   51       private static PortMixer[] devices;
   52   
   53   
   54       // STATIC
   55   
   56       static {
   57           // initialize
   58           Platform.initialize();
   59       }
   60   
   61   
   62       // CONSTRUCTOR
   63   
   64   
   65       /**
   66        * Required public no-arg constructor.
   67        */
   68       public PortMixerProvider() {
   69           //if (Printer.trace) Printer.trace("PortMixerProvider: constructor");
   70           if (Platform.isPortsEnabled()) {
   71               init();
   72           } else {
   73               infos = new PortMixerInfo[0];
   74               devices = new PortMixer[0];
   75           }
   76       }
   77   
   78       private static synchronized void init() {
   79           // get the number of input devices
   80           int numDevices = nGetNumDevices();
   81   
   82           if (infos == null || infos.length != numDevices) {
   83               if (Printer.trace) Printer.trace("PortMixerProvider: init()");
   84               // initialize the arrays
   85               infos = new PortMixerInfo[numDevices];
   86               devices = new PortMixer[numDevices];
   87   
   88               // fill in the info objects now.
   89               // we'll fill in the device objects as they're requested.
   90               for (int i = 0; i < infos.length; i++) {
   91                   infos[i] = nNewPortMixerInfo(i);
   92               }
   93               if (Printer.trace) Printer.trace("PortMixerProvider: init(): found numDevices: " + numDevices);
   94           }
   95       }
   96   
   97       public Mixer.Info[] getMixerInfo() {
   98           Mixer.Info[] localArray = new Mixer.Info[infos.length];
   99           System.arraycopy(infos, 0, localArray, 0, infos.length);
  100           return localArray;
  101       }
  102   
  103   
  104       public Mixer getMixer(Mixer.Info info) {
  105           for (int i = 0; i < infos.length; i++) {
  106               if (infos[i].equals(info)) {
  107                   return getDevice(infos[i]);
  108               }
  109           }
  110           throw new IllegalArgumentException("Mixer " + info.toString() + " not supported by this provider.");
  111       }
  112   
  113   
  114       private Mixer getDevice(PortMixerInfo info) {
  115           int index = info.getIndex();
  116           if (devices[index] == null) {
  117               devices[index] = new PortMixer(info);
  118           }
  119           return devices[index];
  120       }
  121   
  122       // INNER CLASSES
  123   
  124   
  125       /**
  126        * Info class for PortMixers.  Adds an index value for
  127        * making native references to a particular device.
  128        * This constructor is called from native.
  129        */
  130       static class PortMixerInfo extends Mixer.Info {
  131           private int index;
  132   
  133           private PortMixerInfo(int index, String name, String vendor, String description, String version) {
  134               super("Port " + name, vendor, description, version);
  135               this.index = index;
  136           }
  137   
  138           int getIndex() {
  139               return index;
  140           }
  141   
  142       } // class PortMixerInfo
  143   
  144       // NATIVE METHODS
  145       private static native int nGetNumDevices();
  146       private static native PortMixerInfo nNewPortMixerInfo(int mixerIndex);
  147   }

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