/*
* Copyright (c) 1999, 2019, 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.
*
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*/
package com.sun.media.sound;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.StringTokenizer;
/**
* Audio configuration class for exposing attributes specific to the platform or system.
*
* @author Kara Kytle
* @author Florian Bomers
*/
final class Platform {
// native library we need to load
private static final String libName = "jsound";
private static boolean isNativeLibLoaded;
// SYSTEM CHARACTERISTICS
// vary according to hardware architecture
// intel is little-endian. sparc is big-endian.
private static boolean bigEndian;
static {
loadLibraries();
}
/**
* Private constructor.
*/
private Platform() {
}
/**
* Dummy method for forcing initialization.
*/
static void initialize() {
}
/**
* Determine whether the system is big-endian.
*/
static boolean isBigEndian() {
return bigEndian;
}
/**
* Load the native library or libraries.
*/
private static void loadLibraries() {
// load the native library
isNativeLibLoaded = true;
try {
AccessController.doPrivileged((PrivilegedAction<Void>) () -> {
System.loadLibrary(libName);
return null;
});
} catch (Throwable t) {
if (Printer.err) Printer.err("Couldn't load library "+libName+": "+t.toString());
isNativeLibLoaded = false;
}
if (isNativeLibLoaded) {
bigEndian = nIsBigEndian();
}
}
static boolean isMidiIOEnabled() {
/**代码未完, 请加载全部代码(NowJava.com).**/