2003-08-17 12:38:57 -04:00
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/*
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2004-06-12 16:28:34 -04:00
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* Copyright (c) 2002-2004 LWJGL Project
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2003-08-17 12:38:57 -04:00
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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2004-06-12 16:28:34 -04:00
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* * Neither the name of 'LWJGL' nor the names of
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2003-08-17 12:38:57 -04:00
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package org.lwjgl.openal;
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2004-02-26 16:51:58 -05:00
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import java.io.File;
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import java.lang.reflect.Method;
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import java.util.StringTokenizer;
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2004-03-27 10:05:24 -05:00
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import org.lwjgl.LWJGLException;
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2004-05-05 10:28:40 -04:00
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import org.lwjgl.Sys;
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2004-02-26 16:51:58 -05:00
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2003-08-17 12:38:57 -04:00
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/**
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* $Id$
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* <br>
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* This is the OpenAL class. It extends the latest core.
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*
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* @author Brian Matzon <brian@matzon.dk>
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* @version $Revision$
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*/
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2004-02-26 16:51:58 -05:00
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public abstract class AL {
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2003-08-17 12:38:57 -04:00
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/** ALC instance. */
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protected static ALC alc;
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/** ALCdevice instance. */
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protected static ALCdevice device;
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/** Current ALCcontext. */
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protected static ALCcontext context;
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/**
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* String that requests a certain device or device configuration.
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* If null is specified, the implementation will provide an
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2004-02-26 16:51:58 -05:00
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* implementation specific default.
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2004-03-08 10:21:10 -05:00
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*/
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2003-08-17 12:38:57 -04:00
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protected static String deviceArguments;
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/** Frequency for mixing output buffer, in units of Hz. */
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protected static int contextFrequency = -1;
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/** Refresh intervalls, in units of Hz. */
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protected static int contextRefresh = -1;
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/** Flag, indicating a synchronous context. */
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protected static int contextSynchronized = ALC.ALC_FALSE;
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2004-03-08 10:21:10 -05:00
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/** Have we been created? */
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protected static boolean created;
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static {
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2004-03-27 08:48:58 -05:00
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Sys.initialize();
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2004-03-08 10:21:10 -05:00
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}
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/**
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* Native method to create AL instance
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*
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* @param oalPaths Array of strings containing paths to search for OpenAL library
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*/
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protected static native void nCreate(String[] oalPaths) throws LWJGLException;
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/**
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* Native method the destroy the AL
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*/
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protected static native void nDestroy();
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/**
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* @return true if AL has been created
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*/
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public static boolean isCreated() {
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return created;
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}
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2003-08-17 12:38:57 -04:00
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/**
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2004-03-27 09:42:47 -05:00
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* Creates an OpenAL instance. Using this constructor will cause OpenAL to
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* open the device using supplied device argument, and create a context using the context values
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* supplied.
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*
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* @param deviceArguments Arguments supplied to native device
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* @param contextFrequency Frequency for mixing output buffer, in units of Hz (Common values include 11025, 22050, and 44100).
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* @param contextRefresh Refresh intervalls, in units of Hz.
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* @param contextSynchronized Flag, indicating a synchronous context.*
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2003-08-17 12:38:57 -04:00
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*/
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public static void create(String deviceArguments, int contextFrequency, int contextRefresh, boolean contextSynchronized)
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throws LWJGLException {
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2004-03-08 10:21:10 -05:00
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if (created) {
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return;
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}
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2003-08-17 12:38:57 -04:00
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AL.deviceArguments = deviceArguments;
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AL.contextFrequency = contextFrequency;
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AL.contextRefresh = contextRefresh;
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AL.contextSynchronized = contextSynchronized ? ALC.ALC_TRUE : ALC.ALC_FALSE;
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create();
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}
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2004-07-04 09:58:11 -04:00
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private static String[] getOALPaths() throws LWJGLException {
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2004-03-08 10:21:10 -05:00
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// need to pass path of possible locations of OAL to native side
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String libpath = System.getProperty("java.library.path");
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String seperator = System.getProperty("path.separator");
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String jwsLibname;
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2004-05-05 10:28:40 -04:00
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String osName = System.getProperty("os.name");
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if (osName.startsWith("Win")) {
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jwsLibname = "lwjglaudio";
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} else if (osName.startsWith("Lin")) {
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jwsLibname = "openal";
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} else if (osName.startsWith("Mac")) {
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jwsLibname = "openal";
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} else {
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throw new LWJGLException("Unknown platform: "+osName);
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2004-03-08 10:21:10 -05:00
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}
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String jwsPath = getPathFromJWS(jwsLibname);
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if (jwsPath != null) {
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libpath += seperator
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+ jwsPath.substring(0, jwsPath.lastIndexOf(File.separator));
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}
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StringTokenizer st = new StringTokenizer(libpath, seperator);
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//create needed string array
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String[] oalPaths = new String[st.countTokens() + 1];
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//build paths
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for (int i = 0; i < oalPaths.length - 1; i++) {
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oalPaths[i] = st.nextToken() + File.separator;
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}
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//add cwd path
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oalPaths[oalPaths.length - 1] = "";
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2004-07-04 09:58:11 -04:00
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return oalPaths;
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}
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2003-08-17 12:38:57 -04:00
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2004-07-04 09:58:11 -04:00
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/**
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* Creates an OpenAL instance. The empty create will cause OpenAL to
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* open the default device, and create a context using default values.
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*/
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public static void create() throws LWJGLException {
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if (created) {
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return;
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2003-08-17 12:38:57 -04:00
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}
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2004-07-04 09:58:11 -04:00
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String[] oalPaths = getOALPaths();
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nCreate(oalPaths);
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2004-03-08 10:21:10 -05:00
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created = true;
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2004-07-04 09:58:11 -04:00
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try {
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AL10.initNativeStubs();
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ALC.initNativeStubs();
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device = ALC.alcOpenDevice(deviceArguments);
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if (device == null)
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throw new LWJGLException("Could not open ALC device");
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//check if doing default values or not
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if (contextFrequency == -1) {
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context = ALC.alcCreateContext(device.device, null);
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} else {
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context = ALC.alcCreateContext(device.device,
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ALCcontext.createAttributeList(contextFrequency, contextRefresh, contextSynchronized));
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}
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2004-07-04 10:08:53 -04:00
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ALC.alcMakeContextCurrent(context.context);
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2004-07-04 09:58:11 -04:00
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created = true;
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} catch (LWJGLException e) {
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destroy();
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throw e;
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}
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2003-08-17 12:38:57 -04:00
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}
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/**
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* Exit cleanly by calling destroy.
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*/
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public static void destroy() {
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2004-07-04 09:58:11 -04:00
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if (context != null) {
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ALC.alcDestroyContext(context.context);
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context = null;
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2004-03-08 10:21:10 -05:00
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}
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2004-07-04 09:58:11 -04:00
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if (device != null) {
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ALC.alcCloseDevice(device.device);
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device = null;
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}
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resetNativeStubs(AL10.class);
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resetNativeStubs(ALC.class);
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2003-08-17 12:38:57 -04:00
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deviceArguments = null;
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contextFrequency = -1;
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contextRefresh = -1;
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contextSynchronized = ALC.ALC_FALSE;
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2004-03-08 10:21:10 -05:00
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2004-07-04 09:58:11 -04:00
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if (created)
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nDestroy();
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2004-03-08 10:21:10 -05:00
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created = false;
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2003-08-17 12:38:57 -04:00
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}
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2004-03-08 10:21:10 -05:00
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/**
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* Tries to locate OpenAL from the JWS Library path
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* This method exists because OpenAL is loaded from native code, and as such
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* is exempt from JWS library loading rutines. OpenAL therefore always fails.
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* We therefore invoke the protected method of the JWS classloader to see if it can
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* locate it.
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*
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* @param libname Name of library to search for
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* @return Absolute path to library if found, otherwise null
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*/
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private static String getPathFromJWS(String libname) {
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try {
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Sys.log("JWS Classloader looking for: " + libname);
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Object o = AL.class.getClassLoader();
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Class c = o.getClass();
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Method findLibrary =
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c.getMethod("findLibrary", new Class[] { String.class });
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Object[] arguments = new Object[] { libname };
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return (String) findLibrary.invoke(o, arguments);
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} catch (Exception e) {
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Sys.log("Failure locating OpenAL using classloader:" + e);
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}
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return null;
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2004-07-04 09:58:11 -04:00
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}
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private static native void resetNativeStubs(Class clazz);
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2004-03-08 10:21:10 -05:00
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}
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