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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
/** * 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.
/** * 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.
/** * Set of all port input devices on the system. */
private static PortMixer[] devices; // STATIC static { // initialize Platform.initialize(); } // CONSTRUCTOR
Required public no-arg 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.
/** * 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); }