| /* |
| * Copyright (c) 1999, 2007, 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 java.util.StringTokenizer; |
| |
| |
| |
| /** |
| * Audio configuration class for exposing attributes specific to the platform or system. |
| * |
| * @author Kara Kytle |
| * @author Florian Bomers |
| */ |
| class Platform { |
| |
| |
| // STATIC FINAL CHARACTERISTICS |
| |
| // native library we need to load |
| private static final String libNameMain = "jsound"; |
| private static final String libNameALSA = "jsoundalsa"; |
| private static final String libNameDSound = "jsoundds"; |
| |
| // extra libs handling: bit flags for each different library |
| public static final int LIB_MAIN = 1; |
| public static final int LIB_ALSA = 2; |
| public static final int LIB_DSOUND = 4; |
| |
| // bit field of the constants above. Willbe set in loadLibraries |
| private static int loadedLibs = 0; |
| |
| // features: the main native library jsound reports which feature is |
| // contained in which lib |
| public static final int FEATURE_MIDIIO = 1; |
| public static final int FEATURE_PORTS = 2; |
| public static final int FEATURE_DIRECT_AUDIO = 3; |
| |
| // SYSTEM CHARACTERISTICS |
| // vary according to hardware architecture |
| |
| // signed8 (use signed 8-bit values) is true for everything we support except for |
| // the solaris sbpro card. |
| // we'll leave it here as a variable; in the future we may need this in java. |
| // wait, is that true? i'm not sure. i think solaris takes unsigned data? |
| // $$kk: 03.11.99: i think solaris takes unsigned 8-bit or signed 16-bit data.... |
| private static boolean signed8; |
| |
| // intel is little-endian. sparc is big-endian. |
| private static boolean bigEndian; |
| |
| // this is the value of the "java.home" system property. i am looking it up here |
| // for use when trying to load the soundbank, just so |
| // that all the privileged code is localized in this file.... |
| private static String javahome; |
| |
| // this is the value of the "java.class.path" system property |
| private static String classpath; |
| |
| |
| |
| |
| static { |
| if(Printer.trace)Printer.trace(">> Platform.java: static"); |
| |
| loadLibraries(); |
| readProperties(); |
| } |
| |
| |
| /** |
| * Private constructor. |
| */ |
| private Platform() { |
| } |
| |
| |
| // METHODS FOR INTERNAL IMPLEMENTATION USE |
| |
| |
| /** |
| * Dummy method for forcing initialization. |
| */ |
| static void initialize() { |
| |
| if(Printer.trace)Printer.trace("Platform: initialize()"); |
| } |
| |
| |
| /** |
| * Determine whether the system is big-endian. |
| */ |
| static boolean isBigEndian() { |
| |
| return bigEndian; |
| } |
| |
| |
| /** |
| * Determine whether the system takes signed 8-bit data. |
| */ |
| static boolean isSigned8() { |
| |
| return signed8; |
| } |
| |
| |
| /** |
| * Obtain javahome. |
| * $$kk: 04.16.99: this is *bad*!! |
| */ |
| static String getJavahome() { |
| |
| return javahome; |
| } |
| |
| /** |
| * Obtain classpath. |
| * $$jb: 04.21.99: this is *bad* too!! |
| */ |
| static String getClasspath() { |
| |
| return classpath; |
| } |
| |
| |
| // PRIVATE METHODS |
| |
| /** |
| * Load the native library or libraries. |
| */ |
| private static void loadLibraries() { |
| if(Printer.trace)Printer.trace(">>Platform.loadLibraries"); |
| |
| try { |
| // load the main library |
| JSSecurityManager.loadLibrary(libNameMain); |
| // just for the heck of it... |
| loadedLibs |= LIB_MAIN; |
| } catch (SecurityException e) { |
| if(Printer.err)Printer.err("Security exception loading main native library. JavaSound requires access to these resources."); |
| throw(e); |
| } |
| |
| // now try to load extra libs. They are defined at compile time in the Makefile |
| // with the define EXTRA_SOUND_JNI_LIBS |
| String extraLibs = nGetExtraLibraries(); |
| // the string is the libraries, separated by white space |
| StringTokenizer st = new StringTokenizer(extraLibs); |
| while (st.hasMoreTokens()) { |
| String lib = st.nextToken(); |
| try { |
| JSSecurityManager.loadLibrary(lib); |
| if (lib.equals(libNameALSA)) { |
| loadedLibs |= LIB_ALSA; |
| if (Printer.debug) Printer.debug("Loaded ALSA lib successfully."); |
| } else if (lib.equals(libNameDSound)) { |
| loadedLibs |= LIB_DSOUND; |
| if (Printer.debug) Printer.debug("Loaded DirectSound lib successfully."); |
| } else { |
| if (Printer.err) Printer.err("Loaded unknown lib '"+lib+"' successfully."); |
| } |
| } catch (Throwable t) { |
| if (Printer.err) Printer.err("Couldn't load library "+lib+": "+t.toString()); |
| } |
| } |
| } |
| |
| |
| static boolean isMidiIOEnabled() { |
| return isFeatureLibLoaded(FEATURE_MIDIIO); |
| } |
| |
| static boolean isPortsEnabled() { |
| return isFeatureLibLoaded(FEATURE_PORTS); |
| } |
| |
| static boolean isDirectAudioEnabled() { |
| return isFeatureLibLoaded(FEATURE_DIRECT_AUDIO); |
| } |
| |
| private static boolean isFeatureLibLoaded(int feature) { |
| if (Printer.debug) Printer.debug("Platform: Checking for feature "+feature+"..."); |
| int requiredLib = nGetLibraryForFeature(feature); |
| boolean isLoaded = (requiredLib != 0) && ((loadedLibs & requiredLib) == requiredLib); |
| if (Printer.debug) Printer.debug(" ...needs library "+requiredLib+". Result is loaded="+isLoaded); |
| return isLoaded; |
| } |
| |
| // the following native methods are implemented in Platform.c |
| private native static boolean nIsBigEndian(); |
| private native static boolean nIsSigned8(); |
| private native static String nGetExtraLibraries(); |
| private native static int nGetLibraryForFeature(int feature); |
| |
| |
| /** |
| * Read the required system properties. |
| */ |
| private static void readProperties() { |
| // $$fb 2002-03-06: implement check for endianness in native. Facilitates porting ! |
| bigEndian = nIsBigEndian(); |
| signed8 = nIsSigned8(); // Solaris on Sparc: signed, all others unsigned |
| javahome = JSSecurityManager.getProperty("java.home"); |
| classpath = JSSecurityManager.getProperty("java.class.path"); |
| } |
| } |
