265 lines
7.0 KiB
C++
265 lines
7.0 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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EAXSet eaxSet; // EAXSet function, ret$
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EAXGet eaxGet; // EAXGet function, ret$
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/* Handle to OpenAL Library */
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HMODULE handleOAL;
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#endif
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#ifdef _X11
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void* handleOGG;
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void* handleVorbis;
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void* handleVorbisFile;
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void* handleOAL;
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#endif
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#ifdef _AGL
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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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const struct mach_header* handleOAL;
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#endif
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alGetProcAddressPROC alGetProcAddress;
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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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/* Loads OpenAL basic functions */
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extern bool LoadAL(JNIEnv *env);
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/* Loads OpenAL ALC functions */
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extern bool LoadALC(JNIEnv *env);
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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 _AGL
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char *mac_symbol_name = (char *)malloc((strlen(function) + 2)*sizeof(char));
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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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NSSymbol symbol = NSLookupSymbolInImage(handleOAL, mac_symbol_name, NSLOOKUPSYMBOLINIMAGE_OPTION_RETURN_ON_ERROR);
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free(mac_symbol_name);
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if (symbol == NULL)
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return NULL;
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return NSAddressOfSymbol(symbol);
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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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/**
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* Concatenate two strings
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*/
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static char *concatenate(const char *str1, const char *str2) {
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int length1 = strlen(str1);
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int length2 = strlen(str2);
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char *str = (char *)calloc(length1 + length2 + 1, sizeof(char));
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strncpy(str, str1, length1);
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strncpy(str + length1, str2, length2 + 1);
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return str;
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}
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#ifdef _X11
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static void closeVorbisLibs(void) {
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if (handleOGG != NULL) {
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dlclose(handleOGG);
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handleOGG = NULL;
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}
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if (handleVorbis != NULL) {
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dlclose(handleVorbis);
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handleVorbis = NULL;
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}
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if (handleVorbisFile != NULL) {
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dlclose(handleVorbisFile);
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handleVorbisFile = NULL;
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}
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}
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#endif
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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(oalPaths);
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printfDebug("Found %d OpenAL paths\n", (int)pathcount);
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for(int i=0;i<pathcount;i++) {
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jstring path = (jstring) env->GetObjectArrayElement(oalPaths, i);
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const char *path_str = env->GetStringUTFChars(path, NULL);
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printfDebug("Testing '%s'\n", path_str);
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#ifdef _WIN32
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char *lib_str = concatenate(path_str, "lwjglaudio.dll");
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handleOAL = LoadLibrary(lib_str);
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free(lib_str);
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#endif
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#ifdef _X11
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char *lib_str = concatenate(path_str, "libogg.so.0");
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handleOGG = dlopen(lib_str, RTLD_LAZY);
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free(lib_str);
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lib_str = concatenate(path_str, "libvorbis.so.0");
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handleVorbis = dlopen(lib_str, RTLD_LAZY);
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free(lib_str);
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lib_str = concatenate(path_str, "libvorbisfile.so.3");
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handleVorbisFile = dlopen(lib_str, RTLD_LAZY);
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free(lib_str);
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lib_str = concatenate(path_str, "libopenal.so");
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handleOAL = dlopen(lib_str, RTLD_LAZY);
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free(lib_str);
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if (handleOAL == NULL) {
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closeVorbisLibs();
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}
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#endif
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#ifdef _AGL
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char *lib_str = concatenate(path_str, "openal.dylib");
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handleOAL = NSAddImage(lib_str, NSADDIMAGE_OPTION_RETURN_ON_ERROR);
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free(lib_str);
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#endif
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if (handleOAL != NULL) {
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printfDebug("Found OpenAL at '%s'\n", path_str);
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return true;
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}
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env->ReleaseStringUTFChars(path, path_str);
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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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closeVorbisLibs();
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#endif
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#ifdef _AGL
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// Cannot remove the image
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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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//load basic OpenAL functions
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if(!LoadAL(env)) {
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DeInitializeOpenAL();
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throwException(env, "Could not load OpenAL function pointers.");
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return;
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}
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//load OpenAL context functions
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if(!LoadALC(env)) {
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DeInitializeOpenAL();
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throwException(env, "Could not load ALC function pointers.");
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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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bool extal_InitializeClass(JNIEnv *env, jclass clazz, jobject ext_set, const char *ext_name, int num_functions, JavaMethodAndExtFunction *functions) {
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return ext_InitializeClass(env, clazz, ext_set, ext_name, &extal_GetProcAddress, num_functions, functions);
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}
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