SourceLimitTest.java from Lightweight Java Game Library at Krugle

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/* 
 * Copyright (c) 2002-2004 LWJGL 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 'LWJGL' 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.
 */
package org.lwjgl.test.openal;

import java.nio.IntBuffer;

import org.lwjgl.BufferUtils;
import org.lwjgl.openal.AL10;
import org.lwjgl.openal.OpenALException;

/**
 *
 * Simple test for testing the number of available sources
 *
 * @author Brian Matzon <brian@matzon.dk>
 * @version $Revision: 2286 $
 * $Id: SourceLimitTest.java 2286 2006-03-23 19:32:21Z matzon $
 */
public class SourceLimitTest extends BasicTest {

	/** Sources to create */
	protected int sourcesToCreate = 64;

	/**
	 * Creates an instance of SourceLimitTest
	 */
	public SourceLimitTest() {
		super();
	}

	/**
	 * Runs the actual test, using supplied arguments
	 */
	protected void execute(String[] args) {
		//parse 1st arg to sourcecount
		if (args.length > 0) {
			try {
				sourcesToCreate = Integer.parseInt(args[0]);
			} catch (NumberFormatException nfe) {
				System.out.println(
					"Unable to parse parameter to integer. Defaulting to 64 sources.");
			}
		}

    System.out.print("Creating " + sourcesToCreate + " in one go...");
    try {
      CreateAllSources();
    } catch(OpenALException oale) {
		oale.printStackTrace();
    }

    
    System.out.print("Creating " + sourcesToCreate + " one at a time...");
    try {
      CreateSourcesStep();
    } catch(Exception e) {
		e.printStackTrace();
    }
		//shutdown
		alExit();
	}

	/**
	 * Tests the creation of n sources in on go
	 */
	protected void CreateAllSources() {
		int lastError;

		//make bytbuffer that can hold sourcesToCreate sources
		IntBuffer sources = BufferUtils.createIntBuffer(sourcesToCreate);

		//Create sourcesToCreate sources in one fell swoop
		try {
			sources.position(0).limit(sourcesToCreate);
			AL10.alGenSources(sources);
	
			//delete sources
			sources.position(0).limit(sourcesToCreate);
			AL10.alDeleteSources(sources);

			System.out.println("created " + sourcesToCreate + " sources successfully!");
		} catch (OpenALException oale) {
			System.out.println("Unable to create " + sourcesToCreate + " sources");
		}
	}

	/**
	 * Tests if n sources can be created one at a time
	 */
	protected void CreateSourcesStep() {
		int lastError;
		int sourcesCreated = 0;

		//make bytbuffer that can hold sourcesToCreate sources
		IntBuffer[] sources = new IntBuffer[sourcesToCreate];

		//create the sources
		try {
			for (int i = 0; i < sourcesToCreate; i++) {
				sources[i] = BufferUtils.createIntBuffer(1);
				sources[i].position(0).limit(1);
				AL10.alGenSources(sources[i]);
				if ((lastError = AL10.alGetError()) != AL10.AL_NO_ERROR) {
					break;
				}
				sourcesCreated++;
			}
		} catch (OpenALException oale) {
			System.out.println("failed to create source: " + (sourcesCreated + 1));			
		}
    
		//delete allocated sources
		for (int i = 0; i < sourcesCreated; i++) {
			//delete buffers and sources
			sources[i].position(0).limit(1);
			AL10.alDeleteSources(sources[i]);
		}
    
	    if(sourcesCreated != sourcesToCreate) {
	      System.out.println("created " + sourcesCreated + " sources before failing");
	    } else {
	      System.out.println("created " + sourcesCreated + " sources successfully!");
	    }
	}

	/**
	 * main entry point
	 *
	 * @param args String array containing arguments
	 */
	public static void main(String[] args) {
		SourceLimitTest sourceLimitTest = new SourceLimitTest();
		sourceLimitTest.execute(args);
		System.exit(0);
	}
}
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