/*

 * Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package com.sun.media.sound;

import javax.sound.sampled.Mixer;

import javax.sound.sampled.Mixer.Info;

import javax.sound.sampled.spi.MixerProvider;

/**

 * Provider for software audio mixer

 *

 * @author Karl Helgason

 */

public class SoftMixingMixerProvider extends MixerProvider {

    static SoftMixingMixer globalmixer = null;

    static Thread lockthread = null;

    protected final static Object mutex = new Object();

    public Mixer getMixer(Info info) {

        if (!(info == null || info == SoftMixingMixer.info)) {

            throw new IllegalArgumentException("Mixer " + info.toString()

                    + " not supported by this provider.");

        }

        synchronized (mutex) {

            if (lockthread != null)

                if (Thread.currentThread() == lockthread)

                    throw new IllegalArgumentException("Mixer "

                            + info.toString()

                            + " not supported by this provider.");

            if (globalmixer == null)

                globalmixer = new SoftMixingMixer();

            return globalmixer;

        }

    }

    public Info[] getMixerInfo() {

        return new Info[] { SoftMixingMixer.info };

    }

}