I tried to build the source code for the lesson 2 by updating the source from lesson 1 using the comments in between the code snippets of Lesson2. Including the method kbhit() from the download this leaded to the following code:
import java.io.IOException;
import java.io.FileNotFoundException;
import java.nio.FloatBuffer;
import java.nio.IntBuffer;
import java.util.Scanner;
import org.lwjgl.BufferUtils;
import org.lwjgl.LWJGLException;
import org.lwjgl.openal.AL;
import org.lwjgl.openal.AL10;
import org.lwjgl.util.WaveData;
import org.lwjgl.Sys;
public class Lesson2 {
/** Buffers hold sound data. */
IntBuffer buffer = BufferUtils.createIntBuffer(1);
/** Sources are points emitting sound. */
IntBuffer source = BufferUtils.createIntBuffer(1);
/** Position of the source sound. */
FloatBuffer sourcePos = (FloatBuffer)BufferUtils.createFloatBuffer(3).put(new float[] { 0.0f, 0.0f, 0.0f }).rewind();
/** Velocity of the source sound. */
FloatBuffer sourceVel = (FloatBuffer)BufferUtils.createFloatBuffer(3).put(new float[] { 0.0f, 0.0f, 0.1f }).rewind();
/** Position of the listener. */
FloatBuffer listenerPos = (FloatBuffer)BufferUtils.createFloatBuffer(3).put(new float[] { 0.0f, 0.0f, 0.0f }).rewind();
/** Velocity of the listener. */
FloatBuffer listenerVel = (FloatBuffer)BufferUtils.createFloatBuffer(3).put(new float[] { 0.0f, 0.0f, 0.0f }).rewind();
/** Orientation of the listener. (first 3 elements are "at", second 3 are "up") */
FloatBuffer listenerOri = (FloatBuffer)BufferUtils.createFloatBuffer(6).put(new float[] { 0.0f, 0.0f, -1.0f, 0.0f, 1.0f, 0.0f }).rewind();
/**
* boolean LoadALData()
*
* This function will load our sample data from the disk using the Alut
* utility and send the data into OpenAL as a buffer. A source is then
* also created to play that buffer.
*/
int loadALData() {
// Load wav data into a buffer.
AL10.alGenBuffers(buffer);
if(AL10.alGetError() != AL10.AL_NO_ERROR)
return AL10.AL_FALSE;
//Loads the wave file from your file system
/*java.io.FileInputStream fin = null;
try {
fin = new java.io.FileInputStream("Footsteps.wav");
} catch (java.io.FileNotFoundException ex) {
ex.printStackTrace();
return AL10.AL_FALSE;
}
WaveData waveFile = WaveData.create(fin);
try {
fin.close();
} catch (java.io.IOException ex) {
}*/
//Loads the wave file from this class's package in your classpath
WaveData waveFile = WaveData.create("Footsteps.wav");
AL10.alBufferData(buffer.get(0), waveFile.format, waveFile.data, waveFile.samplerate);
waveFile.dispose();
// Bind the buffer with the source.
AL10.alGenSources(source);
if (AL10.alGetError() != AL10.AL_NO_ERROR)
return AL10.AL_FALSE;
AL10.alSourcei(source.get(0), AL10.AL_BUFFER, buffer.get(0) );
AL10.alSourcef(source.get(0), AL10.AL_PITCH, 1.0f );
AL10.alSourcef(source.get(0), AL10.AL_GAIN, 1.0f );
AL10.alSource (source.get(0), AL10.AL_POSITION, sourcePos );
AL10.alSource (source.get(0), AL10.AL_VELOCITY, sourceVel );
AL10.alSourcei(source.get(0), AL10.AL_LOOPING, AL10.AL_TRUE );
// Do another error check and return.
if (AL10.alGetError() == AL10.AL_NO_ERROR)
return AL10.AL_TRUE;
return AL10.AL_FALSE;
}
/**
* void setListenerValues()
*
* We already defined certain values for the Listener, but we need
* to tell OpenAL to use that data. This function does just that.
*/
void setListenerValues() {
AL10.alListener(AL10.AL_POSITION, listenerPos);
AL10.alListener(AL10.AL_VELOCITY, listenerVel);
AL10.alListener(AL10.AL_ORIENTATION, listenerOri);
}
/**
* void killALData()
*
* We have allocated memory for our buffers and sources which needs
* to be returned to the system. This function frees that memory.
*/
void killALData() {
AL10.alDeleteSources(source);
AL10.alDeleteBuffers(buffer);
}
public static void main(String[] args) {
new Lesson2().execute();
}
/**
* Check for keyboard hit
*/
private boolean kbhit() {
try {
return (System.in.available() != 0);
} catch (IOException ioe) {
}
return false;
}
public void execute() {
// Initialize OpenAL and clear the error bit.
try{
AL.create();
} catch (LWJGLException le) {
le.printStackTrace();
return;
}
AL10.alGetError();
// Load the wav data.
if(loadALData() == AL10.AL_FALSE) {
System.out.println("Error loading data.");
return;
}
setListenerValues();
// Loop.
long time = Sys.getTime();
long elapse = 0;
while (!kbhit()) {
elapse += Sys.getTime() - time;
time += elapse;
if (elapse > 5000) {
elapse = 0;
sourcePos.put(0, sourcePos.get(0) + sourceVel.get(0));
sourcePos.put(1, sourcePos.get(1) + sourceVel.get(1));
sourcePos.put(2, sourcePos.get(2) + sourceVel.get(2));
AL10.alSource(source.get(0), AL10.AL_POSITION, sourcePos);
};
}
killALData();
}
}
When the program runs only the core temperature increases. But there are no footsteps.
What's wrong?
//Edit: I could fix the "temperature problem" with a sleep(100):
AL10.alSource(source.get(0), AL10.AL_POSITION, sourcePos);
};
try{
Thread.sleep(100);
}
catch(InterruptedException e){
System.out.println("Sleep Interrupted");
}
}
killALData();
But the missing sound problem remains.
If I'd taken the last code snippet from the downloaded zip the program would have worked earlier. Now it does.
Here's the working code.
import java.io.IOException;
import java.nio.FloatBuffer;
import java.nio.IntBuffer;
import org.lwjgl.BufferUtils;
import org.lwjgl.LWJGLException;
import org.lwjgl.openal.AL;
import org.lwjgl.openal.AL10;
import org.lwjgl.util.WaveData;
import org.lwjgl.Sys;
public class Lesson2 {
/** Buffers hold sound data. */
IntBuffer buffer = BufferUtils.createIntBuffer(1);
/** Sources are points emitting sound. */
IntBuffer source = BufferUtils.createIntBuffer(1);
/** Position of the source sound. */
FloatBuffer sourcePos = (FloatBuffer)BufferUtils.createFloatBuffer(3).put(new float[] { 0.0f, 0.0f, 0.0f }).rewind();
/** Velocity of the source sound. */
FloatBuffer sourceVel = (FloatBuffer)BufferUtils.createFloatBuffer(3).put(new float[] { 0.0f, 0.0f, 0.1f }).rewind();
/** Position of the listener. */
FloatBuffer listenerPos = (FloatBuffer)BufferUtils.createFloatBuffer(3).put(new float[] { 0.0f, 0.0f, 0.0f }).rewind();
/** Velocity of the listener. */
FloatBuffer listenerVel = (FloatBuffer)BufferUtils.createFloatBuffer(3).put(new float[] { 0.0f, 0.0f, 0.0f }).rewind();
/** Orientation of the listener. (first 3 elements are "at", second 3 are "up") */
FloatBuffer listenerOri = (FloatBuffer)BufferUtils.createFloatBuffer(6).put(new float[] { 0.0f, 0.0f, -1.0f, 0.0f, 1.0f, 0.0f }).rewind();
/**
* boolean LoadALData()
*
* This function will load our sample data from the disk using the Alut
* utility and send the data into OpenAL as a buffer. A source is then
* also created to play that buffer.
*/
int loadALData() {
// Load wav data into a buffer.
AL10.alGenBuffers(buffer);
if(AL10.alGetError() != AL10.AL_NO_ERROR)
return AL10.AL_FALSE;
/*
//Loads the wave file from your file system
java.io.FileInputStream fin = null;
try {
fin = new java.io.FileInputStream("Footsteps.wav");
} catch (java.io.FileNotFoundException ex) {
System.out.println("Datei nicht gefunden.");
ex.printStackTrace();
return AL10.AL_FALSE;
}
System.out.println("Datei geöffnet.");
WaveData waveFile = WaveData.create(fin);
try {
fin.close();
} catch (java.io.IOException ex) {
}
*/
//Loads the wave file from this class's package in your classpath
WaveData waveFile = WaveData.create("Footsteps.wav");
AL10.alBufferData(buffer.get(0), waveFile.format, waveFile.data, waveFile.samplerate);
waveFile.dispose();
// Bind the buffer with the source.
AL10.alGenSources(source);
if (AL10.alGetError() != AL10.AL_NO_ERROR)
return AL10.AL_FALSE;
AL10.alSourcei(source.get(0), AL10.AL_BUFFER, buffer.get(0) );
AL10.alSourcef(source.get(0), AL10.AL_PITCH, 1.0f );
AL10.alSourcef(source.get(0), AL10.AL_GAIN, 1.0f );
AL10.alSource (source.get(0), AL10.AL_POSITION, sourcePos );
AL10.alSource (source.get(0), AL10.AL_VELOCITY, sourceVel );
AL10.alSourcei(source.get(0), AL10.AL_LOOPING, AL10.AL_TRUE );
// Do another error check and return.
if (AL10.alGetError() == AL10.AL_NO_ERROR)
return AL10.AL_TRUE;
return AL10.AL_FALSE;
}
/**
* void setListenerValues()
*
* We already defined certain values for the Listener, but we need
* to tell OpenAL to use that data. This function does just that.
*/
void setListenerValues() {
AL10.alListener(AL10.AL_POSITION, listenerPos);
AL10.alListener(AL10.AL_VELOCITY, listenerVel);
AL10.alListener(AL10.AL_ORIENTATION, listenerOri);
}
/**
* void killALData()
*
* We have allocated memory for our buffers and sources which needs
* to be returned to the system. This function frees that memory.
*/
void killALData() {
AL10.alDeleteSources(source);
AL10.alDeleteBuffers(buffer);
}
public static void main(String[] args) {
new Lesson2().execute();
}
public void execute() {
// Initialize OpenAL and clear the error bit.
try{
AL.create();
} catch (LWJGLException le) {
le.printStackTrace();
return;
}
AL10.alGetError();
// Load the wav data.
if(loadALData() == AL10.AL_FALSE) {
System.out.println("Error loading data.");
return;
}
setListenerValues();
AL10.alSourcePlay(source.get(0));
// Loop.
long time = Sys.getTime();
long elapse = 0;
System.out.println("Press ENTER to exit");
while (!kbhit()) {
elapse += Sys.getTime() - time;
time += elapse;
if (elapse > 5000) {
elapse = 0;
sourcePos.put(0, sourcePos.get(0) + sourceVel.get(0));
sourcePos.put(1, sourcePos.get(1) + sourceVel.get(1));
sourcePos.put(2, sourcePos.get(2) + sourceVel.get(2));
AL10.alSource(source.get(0), AL10.AL_POSITION, sourcePos);
};
try{
Thread.sleep(100);
}
catch(InterruptedException e){
System.out.println("Sleep Interrupted");
}
}
killALData();
AL.destroy();
}
/**
* Check for keyboard hit
*/
private boolean kbhit() {
try {
return (System.in.available() != 0);
} catch (IOException ioe) {
}
return false;
}
}