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* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
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*
* 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).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
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package com.sun.media.sound;
import javax.sound.sampled.Mixer;
import javax.sound.sampled.spi.MixerProvider;
/**
* Port provider.
*
* @author Florian Bomers
*/
public final class PortMixerProvider extends MixerProvider {
// STATIC VARIABLES
/**
* Set of info objects for all port input devices on the system.
*/
private static PortMixerInfo[] infos;
/**
* Set of all port input devices on the system.
*/
private static PortMixer[] devices;
// STATIC
static {
// initialize
Platform.initialize();
}
// CONSTRUCTOR
/**
* Required public no-arg constructor.
*/
public PortMixerProvider() {
synchronized (PortMixerProvider.class) {
if (Platform.isPortsEnabled()) {
init();
} else {
infos = new PortMixerInfo[0];
devices = new PortMixer[0];
}
}
}
private static void init() {
// get the number of input devices
int numDevices = nGetNumDevices();
if (infos == null || infos.length != numDevices) {
if (Printer.trace) Printer.trace("PortMixerProvider: init()");
// initialize the arrays
infos = new PortMixerInfo[numDevices];
devices = new PortMixer[numDevices];
// fill in the info objects now.
// we'll fill in the device objects as they're requested.
for (int i = 0; i < infos.length; i++) {
infos[i] = nNewPortMixerInfo(i);
}
if (Printer.trace) Printer.trace("PortMixerProvider: init(): found numDevices: " + numDevices);
}
}
public Mixer.Info[] getMixerInfo() {
synchronized (PortMixerProvider.class) {
Mixer.Info[] localArray = new Mixer.Info[infos.length];
System.arraycopy(infos, 0, localArray, 0, infos.length);
return localArray;
}
}
public Mixer getMixer(Mixer.Info info) {
synchronized (PortMixerProvider.class) {
for (int i = 0; i < infos.length; i++) {
if (infos[i].equals(info)) {
return getDevice(infos[i]);
}
}
}
throw new IllegalArgumentException("Mixer " + info.toString()
+ " not supported by this provider.");
}
private static Mixer getDevice(PortMixerInfo info) {
int index = info.getIndex();
if (devices[index] == null) {
devices[index] = new PortMixer(info);
}
return devices[index];
}
// INNER CLASSES
/**
* Info class for PortMixers. Adds an index value for
* making native references to a particular device.
* This constructor is called from native.
*/
static final class PortMixerInfo extends Mixer.Info {
private final int index;
private PortMixerInfo(int index, String name, String vendor, String description, String version) {
super("Port " + name, vendor, description, version);
this.index = index;
}
int getIndex() {
return index;
}
} // class PortMixerInfo
// NATIVE METHODS
private static native int nGetNumDevices();
private static native PortMixerInfo nNewPortMixerInfo(int mixerIndex);
}