【LWJGL2 WIKI】【辅助库篇】Slick-Util库：第二部分－读取声音

原文：http://wiki.lwjgl.org/wiki/Slick-Util_Library_-Part_2-_Loading_Sounds_for_LWJGL

Java自带支持WAV和AIF格式，Slick-Util自然也可以。另外Slice-Util通过使用外部库还能够支持OGG和XM格式。声音格式既可以读进内存中，也可以从文件流读取。

OGG Support OGG支持

OGG是一种可以与MP3相媲美的专利免费格式。Slick-Util通过使用了Vorbis库支持了它。因此如果你想读OGG文件，你需要加入jorbis-.jar和jogg-.jar文件到classpath中。这些可以在Slick-Util的压缩包里找到。

XM Format XM格式

XM格式是一种声轨格式，由IBXM库支持。因此需要加入ibxm.jar文件到classpath，同样在压缩包里能找到。

Basics 基础

用Slick-Util读取声音很简单，跟读图片相似。所有声文件存在Audio类中，用AudioLoader类读取。

既然你用OpenAL，别忘了在程序关闭前调用AL.destroy()方法来释放资源。

import java.io.IOException;

import org.lwjgl.LWJGLException;
import org.lwjgl.input.Keyboard;
import org.lwjgl.opengl.Display;
import org.lwjgl.opengl.DisplayMode;
import org.lwjgl.opengl.GL11;
import org.lwjgl.openal.AL;
import org.newdawn.slick.openal.Audio;
import org.newdawn.slick.openal.AudioLoader;
import org.newdawn.slick.openal.SoundStore;
import org.newdawn.slick.util.ResourceLoader;

public class SoundExample {
/** The ogg sound effect */
private Audio oggEffect;
/** The wav sound effect */
private Audio wavEffect;
/** The aif source effect */
private Audio aifEffect;
/** The ogg stream thats been loaded */
private Audio oggStream;
/** The mod stream thats been loaded */
private Audio modStream;

/**
* Start the test
*/
public void start() {
initGL(800,600);
init();

while (true) {
update();
GL11.glClear(GL11.GL_COLOR_BUFFER_BIT);
render();

Display.update();
Display.sync(100);

if (Display.isCloseRequested()) {
Display.destroy();
AL.destroy();
System.exit(0);
}
}
}

/**
* Initialise the GL display
*
* @param width The width of the display
* @param height The height of the display
*/
private void initGL(int width, int height) {
try {
Display.setDisplayMode(new DisplayMode(width,height));
Display.create();
Display.setVSyncEnabled(true);
} catch (LWJGLException e) {
e.printStackTrace();
System.exit(0);
}

GL11.glEnable(GL11.GL_TEXTURE_2D);
GL11.glShadeModel(GL11.GL_SMOOTH);
GL11.glDisable(GL11.GL_DEPTH_TEST);
GL11.glDisable(GL11.GL_LIGHTING);

GL11.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
GL11.glClearDepth(1);

GL11.glEnable(GL11.GL_BLEND);
GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);

GL11.glViewport(0,0,width,height);
GL11.glMatrixMode(GL11.GL_MODELVIEW);

GL11.glMatrixMode(GL11.GL_PROJECTION);
GL11.glLoadIdentity();
GL11.glOrtho(0, width, height, 0, 1, -1);
GL11.glMatrixMode(GL11.GL_MODELVIEW);
}

/**
* Initialise resources
*/
public void init() {

try {
// you can play oggs by loading the complete thing into
// a sound
oggEffect = AudioLoader.getAudio("OGG", ResourceLoader.getResourceAsStream("testdata/restart.ogg"));

// or setting up a stream to read from. Note that the argument becomes
// a URL here so it can be reopened when the stream is complete. Probably
// should have reset the stream by thats not how the original stuff worked
oggStream = AudioLoader.getStreamingAudio("OGG", ResourceLoader.getResource("testdata/bongos.ogg"));

// can load mods (XM, MOD) using ibxm which is then played through OpenAL. MODs
// are always streamed based on the way IBXM works
modStream = AudioLoader.getStreamingAudio("MOD", ResourceLoader.getResource("testdata/SMB-X.XM"));

// playing as music uses that reserved source to play the sound. The first
// two arguments are pitch and gain, the boolean is whether to loop the content
modStream.playAsMusic(1.0f, 1.0f, true);

// you can play aifs by loading the complete thing into
// a sound
aifEffect = AudioLoader.getAudio("AIF", ResourceLoader.getResourceAsStream("testdata/burp.aif"));

// you can play wavs by loading the complete thing into
// a sound
wavEffect = AudioLoader.getAudio("WAV", ResourceLoader.getResourceAsStream("testdata/cbrown01.wav"));
} catch (IOException e) {
e.printStackTrace();
}
}

/**
* Game loop update
*/
public void update() {
while (Keyboard.next()) {
if (Keyboard.getEventKeyState()) {
if (Keyboard.getEventKey() == Keyboard.KEY_Q) {
// play as a one off sound effect
oggEffect.playAsSoundEffect(1.0f, 1.0f, false);
}
if (Keyboard.getEventKey() == Keyboard.KEY_W) {
// replace the music thats curretly playing with
// the ogg
oggStream.playAsMusic(1.0f, 1.0f, true);
}
if (Keyboard.getEventKey() == Keyboard.KEY_E) {
// replace the music thats curretly playing with
// the mod
modStream.playAsMusic(1.0f, 1.0f, true);
}
if (Keyboard.getEventKey() == Keyboard.KEY_R) {
// play as a one off sound effect
aifEffect.playAsSoundEffect(1.0f, 1.0f, false);
}
if (Keyboard.getEventKey() == Keyboard.KEY_T) {
// play as a one off sound effect
wavEffect.playAsSoundEffect(1.0f, 1.0f, false);
}
}
}

// polling is required to allow streaming to get a chance to
// queue buffers.
SoundStore.get().poll(0);
}

/**
* Game loop render
*/
public void render() {

}

/**
* Main method
*/
public static void main(String[] argv) {
SoundExample soundExample = new SoundExample();
soundExample.start();
}
}

Credit

Tutorial Credit - Ninja Cave

Kevin Glass for writing the Slick Library and initial example code.