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 }