Original Post
So I've been trying to get a simple game going in Java. I've got an animated title screen and I finally got the music to play. (I'm using java sound because I want to have that lower level functionality for later in the project...especially being able to control where in the file playback will start.) The problem is that if I play the sound file, the music plays until the file is completely fed into my SourceDataLine object, and nothing else happens. It's like the code reader (whatever that is) is stuck in this part of the program and can't do anything else until the music has played all the way through. What this means is none of the other title screen features get taken care of. The graphics don't even get loaded (since this music part happens before any of that other stuff). But, of course, when the music is finished, and the file has been played all the way through, the code continues to do the other stuff in the program...so, the title screen pops up at the end of the song.
I've attached the code that handles the music playing part. I've set it up to where in main, I set up a "Scene_Title" object, and inside this class, the track object (as well as other objects specific to the title screen like sprites etc...). The Scene_Title object gets continuously updated from main, but none of this really matters right now since it just gets stuck in the Track class until the file is finished. I was looking around, and saw a topic that talked about multi threading, is this what I would need to do so that the compiler can focus on other things while it plays out the track? And how do you tell the compiler to multi thread something? Thanks for any feed back.
Also, I've tried removing the while loop, and just loading all the bit data in one go. I was reading something that said you could do this, and it would simply remember your request and load in pieces of it at a time, but I still had the same problem when I did this.
I've attached the code that handles the music playing part. I've set it up to where in main, I set up a "Scene_Title" object, and inside this class, the track object (as well as other objects specific to the title screen like sprites etc...). The Scene_Title object gets continuously updated from main, but none of this really matters right now since it just gets stuck in the Track class until the file is finished. I was looking around, and saw a topic that talked about multi threading, is this what I would need to do so that the compiler can focus on other things while it plays out the track? And how do you tell the compiler to multi thread something? Thanks for any feed back.
Also, I've tried removing the while loop, and just loading all the bit data in one go. I was reading something that said you could do this, and it would simply remember your request and load in pieces of it at a time, but I still had the same problem when I did this.
import java.io.File;
import java.io.IOException;
import javax.sound.sampled.*;
public class Track {
public Track(String name) throws IOException {
//Get a mixer
Mixer.Info[] mixerinfo = AudioSystem.getMixerInfo();
Mixer mixer = AudioSystem.getMixer(mixerinfo[0]);
//Get the file
String separator = System.getProperty("file.separator");
String rootdir = System.getProperty("user.dir");
String trackPath = rootdir + separator + "resources" + separator + "music" +
separator + name;
AudioFileFormat format;
try {
format = AudioSystem.getAudioFileFormat(new File(trackPath));
//get a stream for my file
AudioInputStream stream = AudioSystem.getAudioInputStream(new File(trackPath));
SourceDataLine line;
DataLine.Info info2 = new DataLine.Info(SourceDataLine.class, format.getFormat());
//DataLine.Info info = new DataLine.Info(Clip.class, format.getFormat());
try {
line = (SourceDataLine) mixer.getLine(info2);
line.open();
// get the total length of the sound file in bytes
long length = format.getByteLength();
int bufferSize = line.getBufferSize();
long total = 0;
boolean stopped = false;
line.start();
int nBytesRead = 0;
byte[] bytes = new byte[bufferSize];
try {
while (nBytesRead != -1){
nBytesRead = stream.read(bytes, 0, bytes.length);
if (nBytesRead >= 0){
line.write(bytes, 0, nBytesRead);
}
}
} catch (IOException e){
e.printStackTrace();
return;
} finally {
line.drain();
line.close();
}
} catch (LineUnavailableException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} catch (UnsupportedAudioFileException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}