245 lines
6.8 KiB
C
245 lines
6.8 KiB
C
/*
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* Copyright (c) 2002-2004 LWJGL Project
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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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* * Neither the name of 'LWJGL' nor the names of
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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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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "extal.h"
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#include "common_tools.h"
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#ifdef _X11
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#include <dlfcn.h>
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#endif
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/**
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* $Id$
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*
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* This file contains the AL extension assigning mechanism
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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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#ifdef _WIN32
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/* Handle to OpenAL Library */
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static HMODULE handleOAL;
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#endif
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#ifdef _X11
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static void* handleOAL;
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#endif
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#ifdef _MACOSX
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#include <mach-o/dyld.h>
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#include <stdlib.h>
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#include <string.h>
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#include <CoreFoundation/CoreFoundation.h>
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static const struct mach_header* handleOAL = NULL;
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static CFBundleRef openal_bundle = NULL;
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#endif
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typedef ALvoid* (ALAPIENTRY *alGetProcAddressPROC)( ALubyte* fname );
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static alGetProcAddressPROC alGetProcAddress = NULL;
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/* Loads OpenAL */
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static bool LoadOpenAL(JNIEnv *env, jobjectArray oalPaths);
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/* Unloads OpenAL */
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static void UnLoadOpenAL(void);
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static void *NativeGetFunctionPointer(const char *function) {
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#ifdef _WIN32
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return GetProcAddress(handleOAL, function);
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#endif
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#ifdef _X11
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return dlsym(handleOAL, function);
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#endif
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#ifdef _MACOSX
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char *mac_symbol_name = (char *)malloc((strlen(function) + 2)*sizeof(char));
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void *address = NULL;
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if (mac_symbol_name == NULL)
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return NULL;
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mac_symbol_name[0] = '_';
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strcpy(&(mac_symbol_name[1]), function);
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if (handleOAL != NULL) {
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NSSymbol symbol = NSLookupSymbolInImage(handleOAL, mac_symbol_name, NSLOOKUPSYMBOLINIMAGE_OPTION_RETURN_ON_ERROR);
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if (symbol != NULL) {
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address = NSAddressOfSymbol(symbol);
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}
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} else if (openal_bundle != NULL) {
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CFStringRef cf_function = CFStringCreateWithCString(NULL, function, kCFStringEncodingUTF8);
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address = CFBundleGetFunctionPointerForName(openal_bundle, cf_function);
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CFRelease(cf_function);
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}
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free(mac_symbol_name);
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return address;
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#endif
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}
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/**
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* Retrieves a pointer to the named function
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*
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* @param function Name of function
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* @return pointer to named function, or NULL if not found
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*/
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static void* extal_GetProcAddress(const char* function) {
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void *p = NativeGetFunctionPointer(function);
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if (p == NULL) {
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printfDebug("Could not locate symbol %s\n", function);
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}
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return p;
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}
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#ifdef _MACOSX
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static CFBundleRef tryLoadFramework(JNIEnv *env) {
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CFStringRef framework_path = CFSTR("/System/Library/Frameworks/OpenAL.framework");
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if (framework_path == NULL) {
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printfDebugJava(env, "Failed to allocate string");
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return NULL;
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}
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CFURLRef url = CFURLCreateWithFileSystemPath(NULL, framework_path, kCFURLPOSIXPathStyle, TRUE);
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if (url == NULL) {
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printfDebugJava(env, "Failed to allocate URL");
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return NULL;
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}
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CFBundleRef openal_bundle = CFBundleCreate(NULL, url);
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CFRelease(url);
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return openal_bundle;
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}
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#endif
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static bool tryLoadLibrary(JNIEnv *env, jstring path) {
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#ifdef _WIN32
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char *path_str = GetStringNativeChars(env, path);
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printfDebugJava(env, "Testing '%s'", path_str);
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handleOAL = LoadLibrary(path_str);
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if (handleOAL != NULL) {
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printfDebugJava(env, "Found OpenAL at '%s'", path_str);
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}
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free(path_str);
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return handleOAL != NULL;
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#endif
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#ifdef _X11
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char *path_str = GetStringNativeChars(env, path);
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printfDebugJava(env, "Testing '%s'", path_str);
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handleOAL = dlopen(path_str, RTLD_LAZY);
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if (handleOAL != NULL) {
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printfDebugJava(env, "Found OpenAL at '%s'", path_str);
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}
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free(path_str);
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return handleOAL != NULL;
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#endif
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#ifdef _MACOSX
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const char *path_str = (*env)->GetStringUTFChars(env, path, NULL);
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printfDebugJava(env, "Testing '%s'", path_str);
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handleOAL = NSAddImage(path_str, NSADDIMAGE_OPTION_RETURN_ON_ERROR);
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if (handleOAL != NULL) {
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printfDebugJava(env, "Found OpenAL at '%s'", path_str);
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}
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(*env)->ReleaseStringUTFChars(env, path, path_str);
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openal_bundle = tryLoadFramework(env);
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if (openal_bundle != NULL)
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printfDebugJava(env, "Found OpenAL Bundle");
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return handleOAL != NULL || openal_bundle != NULL;
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#endif
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}
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/**
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* Loads the OpenAL Library
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*/
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static bool LoadOpenAL(JNIEnv *env, jobjectArray oalPaths) {
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jsize pathcount = (*env)->GetArrayLength(env, oalPaths);
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int i;
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jstring path;
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for(i=0;i<pathcount;i++) {
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path = (jstring) (*env)->GetObjectArrayElement(env, oalPaths, i);
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if (tryLoadLibrary(env, path)) {
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return true;
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}
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}
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throwException(env, "Could not load openal library.");
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return false;
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}
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/**
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* Unloads the OpenAL Library
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*/
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static void UnLoadOpenAL() {
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#ifdef _WIN32
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FreeLibrary(handleOAL);
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#endif
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#ifdef _X11
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if (handleOAL != NULL) {
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dlclose(handleOAL);
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handleOAL = NULL;
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}
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#endif
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#ifdef _MACOSX
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if (openal_bundle != NULL) {
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CFRelease(openal_bundle);
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openal_bundle = NULL;
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}
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#endif
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}
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/**
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* Initializes OpenAL by loading the library
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*/
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void InitializeOpenAL(JNIEnv *env, jobjectArray oalPaths) {
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if(handleOAL != NULL) {
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return;
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}
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//load our library
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if (!LoadOpenAL(env, oalPaths)) {
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return;
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}
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alGetProcAddress = (alGetProcAddressPROC)extal_GetProcAddress("alGetProcAddress");
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if (alGetProcAddress == NULL) {
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DeInitializeOpenAL();
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throwException(env, "Could not load alGetProcAddress function pointer.");
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return;
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}
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}
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/**
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* Called to deinitialize OpenAL
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*/
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void DeInitializeOpenAL() {
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UnLoadOpenAL();
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handleOAL = 0;
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}
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void extal_InitializeClass(JNIEnv *env, jclass clazz, int num_functions, JavaMethodAndExtFunction *functions) {
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ext_InitializeClass(env, clazz, &extal_GetProcAddress, num_functions, functions);
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}
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