/* 
 * Copyright (c) 2002-2004 Lightweight Java Game Library Project
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are 
 * met:
 * 
 * * Redistributions of source code must retain the above copyright 
 *   notice, this list of conditions and the following disclaimer.
 *
 * * Redistributions 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 'Lightweight Java Game Library' nor the names of 
 *   its contributors may be used to endorse or promote products derived 
 *   from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/**
 * $Id$
 *
 * This is the actual JNI implementation of the OpenAL EAX library. 
 * 
 * @author Brian Matzon <brian@matzon.dk>
 * @version $Revision$
 */
#include "org_lwjgl_openal_eax_EAX20.h"

/* OpenAL includes */
#include "checkALerror.h"
#include "common_tools.h"
#include "extal.h"

/*
 * Determines available EAX extensions
 */
JNIEXPORT void JNICALL Java_org_lwjgl_openal_eax_EAX20_determineAvailableExtensions (JNIEnv *env, jclass clazz) {
#ifdef _WIN32    
	bool EAXSupported = false;

	//check that we have a current context
	if(alcGetCurrentContext() == NULL) {
		throwOpenALException(env, "Unable to determine EAX Extensions: No current context");
	}

	//check for extension, and assign if available
	if(alIsExtensionPresent((ALubyte*) "EAX") == AL_TRUE) {
		eaxSet = (EAXSet)alGetProcAddress((ALubyte*) "EAXSet");
		eaxGet = (EAXGet)alGetProcAddress((ALubyte*) "EAXGet");
		EAXSupported = (eaxSet != NULL && eaxGet != NULL);
	}

	//throw exception if no EAX support
	if(EAXSupported != true) {
		throwOpenALException(env, "Unable to determine EAX Extensions");
	}
#else
	throwOpenALException(env, "EAX extensions not supported");
#endif
}

/*
 * This function retrieves an EAX value.
 * 
 * C Specification:
 * ALenum EAXGet(const struct _GUID *propertySetID,ALuint property,ALuint source,ALvoid
 * *value,ALuint size);
 */
JNIEXPORT jint JNICALL Java_org_lwjgl_openal_eax_EAX20_neaxGet (JNIEnv *env, jclass clazz, jint propertySetID, jint property, jint source, jobject value, jint offset, jint size) {
#ifdef _WIN32
	jint result = 0;

  // determine buffer or listener
  if (propertySetID == org_lwjgl_openal_eax_EAX20_BUFFER_GUID) {
    result = (jint) eaxGet(&DSPROPSETID_EAX20_BufferProperties, (ALuint) property, (ALuint) source, (ALvoid*) (offset + (const char*) env->GetDirectBufferAddress(value)), (ALuint) size);
	} else if (propertySetID == org_lwjgl_openal_eax_EAX20_LISTENER_GUID) {
	  result = (jint) eaxGet(&DSPROPSETID_EAX20_ListenerProperties, (ALuint) property, (ALuint) source, (ALvoid*) (offset + (const char*) env->GetDirectBufferAddress(value)), (ALuint) size);
	}
  CHECK_AL_ERROR  
	return result;
#else
	throwOpenALException(env, "EAX extensions not supported");
	return 0;
#endif
}

/*
 * This function sets an EAX value.
 * 
 * C Specification:
 * ALenum EAXSet(const struct _GUID *propertySetID,ALuint property,ALuint source,ALvoid
 * *value,ALuint size);
 */
JNIEXPORT jint JNICALL Java_org_lwjgl_openal_eax_EAX20_neaxSet (JNIEnv *env, jclass clazz, jint propertySetID, jint property, jint source, jobject value, jint offset, jint size) {
#ifdef _WIN32
  jint result = 0;
  
  // determine buffer or listener
  if (propertySetID == org_lwjgl_openal_eax_EAX20_BUFFER_GUID) {
    result = (jint) eaxSet(&DSPROPSETID_EAX20_BufferProperties, (ALuint) (property), source, (ALvoid*) (offset + (const char*) env->GetDirectBufferAddress(value)), (ALuint) size);
	} else if (propertySetID == org_lwjgl_openal_eax_EAX20_LISTENER_GUID) {
	  result = (jint) eaxSet(&DSPROPSETID_EAX20_ListenerProperties, (ALuint) (property), source, (ALvoid*) (offset + (const char*) env->GetDirectBufferAddress(value)), (ALuint) size);
	}	
  CHECK_AL_ERROR
	return result;
#else
	throwOpenALException(env, "EAX extensions not supported");
	return 0;
#endif
}