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/**
* Copyright (c) 2003-2005 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* -Redistribution of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* -Redistribution in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of Sun Microsystems, Inc. or the names of contributors may
* be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any kind.
* ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
* ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
* NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MICROSYSTEMS, INC. ("SUN") AND ITS
* LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A
* RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
* IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT
* OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR
* PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
* ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS
* BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed or intended for use in the
* design, construction, operation or maintenance of any nuclear facility.
*/
package com.jogamp.openal;
import jogamp.openal.ALCImpl;
import jogamp.openal.ALExtImpl;
import jogamp.openal.ALImpl;
import jogamp.openal.Debug;
import com.jogamp.common.os.Platform;
import com.jogamp.common.util.PropertyAccess;
/**
* This class provides factory methods for generating AL and ALC objects.
*
* <p>
* Select preferred OpenAL native library type via system properties,
* i.e. System-OpenAL or bundled Soft-OpenAL.<br/>
* If the preferred choice fails, implementation falls back to the other.
* <PRE>
-Djoal.openal.lib=auto Prefer System-OpenAL over bundled Soft-OpenAL for OSX. Prefer bundled Soft-OpenAL over System-OpenAL for all others. This is the default.
-Djoal.openal.lib=system Prefer System-OpenAL over bundled Soft-OpenAL for all.
-Djoal.openal.lib=soft Prefer bundled Soft-OpenAL over System-OpenAL for all.
</PRE>
* Note: You may use the 'jnlp.' prefix, allowing using above property names w/ Applets and WebStart,
* e.g. 'jnlp.joal.openal.lib=system'.
* </p>
*
* @author Athomas Goldberg, Kenneth Russell, et.al.
*/
public class ALFactory {
public static final boolean DEBUG = Debug.debug("Factory");
/** If true, prefer System-OpenAL, otherwise bundled Soft-OpenAL (default). */
public static final boolean PREFER_SYSTEM_OPENAL;
static {
Platform.initSingleton();
final String choice = PropertyAccess.getProperty("joal.openal.lib", true);
boolean useSystem = false; // default on all systems
if( null != choice ) {
if( choice.equals("system") ) {
useSystem = true;
} else if( choice.equals("soft") ) {
useSystem = false;
}
}
PREFER_SYSTEM_OPENAL = useSystem;
}
private static boolean initialized = false;
private static AL al;
private static ALC alc;
private static ALExt alext;
private ALFactory() {}
private static synchronized void initialize() throws ALException {
try {
if (!initialized) {
if(null == ALImpl.getALProcAddressTable()) {
throw new ALException("AL not initialized (ProcAddressTable null)");
}
initialized = true;
if(DEBUG) {
System.err.println("AL initialized");
}
}
} catch (final UnsatisfiedLinkError e) {
throw new ALException(e);
} catch (final ExceptionInInitializerError er) {
throw new ALException(er);
}
}
/**
* If the system property <code>joal.SystemOpenAL</code> is set
* @return
* @throws ALException
*/
public static boolean getPreferSystemOpenAL() throws ALException {
initialize();
return PREFER_SYSTEM_OPENAL;
}
/**
* Get the default AL object. This object is used to access most of the
* OpenAL functionality.
*
* @return the AL object
*/
public static AL getAL() throws ALException {
initialize();
if (al == null) {
al = new ALImpl();
}
return al;
}
/**
* Get the default ALC object. This object is used to access most of the
* OpenAL context functionality.
*
* @return the ALC object
*/
public static ALC getALC() throws ALException{
initialize();
if (alc == null) {
alc = new ALCImpl();
}
return alc;
}
/**
* Get the default ALExt object. This object is used to access most of the
* OpenAL extension functionality.
*
* @return the ALExt object
*/
public static ALExt getALExt() throws ALException{
initialize();
if (alext == null) {
alext = new ALExtImpl();
}
return alext;
}
}
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