001 /* Mixer API
002 Copyright (C) 2005 Free Software Foundation, Inc.
003
004 This file is part of GNU Classpath.
005
006 GNU Classpath is free software; you can redistribute it and/or modify
007 it under the terms of the GNU General Public License as published by
008 the Free Software Foundation; either version 2, or (at your option)
009 any later version.
010
011 GNU Classpath is distributed in the hope that it will be useful, but
012 WITHOUT ANY WARRANTY; without even the implied warranty of
013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014 General Public License for more details.
015
016 You should have received a copy of the GNU General Public License
017 along with GNU Classpath; see the file COPYING. If not, write to the
018 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019 02110-1301 USA.
020
021 Linking this library statically or dynamically with other modules is
022 making a combined work based on this library. Thus, the terms and
023 conditions of the GNU General Public License cover the whole
024 combination.
025
026 As a special exception, the copyright holders of this library give you
027 permission to link this library with independent modules to produce an
028 executable, regardless of the license terms of these independent
029 modules, and to copy and distribute the resulting executable under
030 terms of your choice, provided that you also meet, for each linked
031 independent module, the terms and conditions of the license of that
032 module. An independent module is a module which is not derived from
033 or based on this library. If you modify this library, you may extend
034 this exception to your version of the library, but you are not
035 obligated to do so. If you do not wish to do so, delete this
036 exception statement from your version. */
037
038
039 package javax.sound.sampled.spi;
040
041 import javax.sound.sampled.Mixer;
042
043 /**
044 * This abstract class defines an interface to mixer providers.
045 * Concrete subclasses will implement the methods in this class.
046 * @since 1.3
047 */
048 public abstract class MixerProvider
049 {
050 /**
051 * Create a new mixer provider.
052 */
053 public MixerProvider()
054 {
055 }
056
057 /**
058 * Return a mixer that matches the given info object.
059 * @param info description of the mixer to match
060 * @return the mixer
061 * @throws IllegalArgumentException if no mixer matches the description
062 */
063 public abstract Mixer getMixer(Mixer.Info info);
064
065 /**
066 * Return an array of info objects describing all the mixers provided by
067 * this provider.
068 */
069 public abstract Mixer.Info[] getMixerInfo();
070
071 /**
072 * Return true if a mixer matching the provided description is supported.
073 * @param info description of the mixer to match
074 * @return true if it is supported by this provider
075 */
076 public boolean isMixerSupported(Mixer.Info info)
077 {
078 Mixer.Info[] infos = getMixerInfo();
079 for (int i = 0; i < infos.length; ++i)
080 {
081 if (info.equals(infos[i]))
082 return true;
083 }
084 return false;
085 }
086 }