Minim, close sound file

Core Library Questions

kelson.ba..

in Core Library Questions • 11 months ago

I am running out of memory very quickly, and I believe it may be related to my sound effects. I am using the following form..

class Object {

AudioPlayer audio_sound;

//other values

Object( values ){

audio_sound = minim.loadFile("Sound.mp3");

//stuff

audio_sound.play();

}

void draw(){

//draw_object_stuff

}

I can't load the sound in setup because then it only plays once. If I try

audio_sound.close();

after the draw() function has been called a set number of times then I get an error like this:

Exception in thread "Animation Thread" java.lang.NullPointerException

at ddf.minim.javasound.JSBaseAudioRecordingStream.close(Unknown Source)

at ddf.minim.AudioPlayer.close(Unknown Source)

at Laser_Ships_Building_Gui$Laser.draw(Laser_Ships_Building_Gui.java:424)

at Laser_Ships_Building_Gui.draw(Laser_Ships_Building_Gui.java:483)

at processing.core.PApplet.handleDraw(PApplet.java:2128)

at processing.core.PGraphicsJava2D.requestDraw(PGraphicsJava2D.java:190)

at processing.core.PApplet.run(PApplet.java:2006)

at java.lang.Thread.run(Thread.java:662)

How can I only load each sound once and get it to play multiple times, or close the file after it has been used effectively?

Replies(3)

PhiLho

Re: Minim, close sound file

11 months ago

I am far from being a Minim specialist, but I believe somebody mentioned AudioClip to play a sound multiple times. Have you tried a forum search? This is a recurrent question...

sableRaph

Re: Minim, close sound file

10 months ago

I have the same problem and I could not find an answer either on the forum, the minim website or javadocs.

I am loading .wav files from the data folder as AudioPlayer objects. At exit, I try to clean after myself, closing the AudioPlayer objects and using minim.stop();

I get this output:

Shuting down

Closing all players

closing "arm" AudioPlayer...

java.lang.NullPointerException

closing "burn" AudioPlayer...

closing "blast" AudioPlayer...

closing "fuse" AudioPlayer...

closing "ignite" AudioPlayer...

at ddf.minim.javasound.JSBaseAudioRecordingStream.close(Unknown Source)

at ddf.minim.AudioPlayer.close(Unknown Source)

at dynamite_juggle$Audio.close(dynamite_juggle.java:563)

at dynamite_juggle.stop(dynamite_juggle.java:350)

at dynamite_juggle$1.run(dynamite_juggle.java:707)

at java.lang.Thread.run(Thread.java:680)

java.lang.NullPointerException

at ddf.minim.javasound.JSBaseAudioRecordingStream.close(Unknown Source)

at ddf.minim.AudioPlayer.close(Unknown Source)

at dynamite_juggle$Audio.close(dynamite_juggle.java:563)

at dynamite_juggle.stop(dynamite_juggle.java:350)

at dynamite_juggle$1.run(dynamite_juggle.java:707)

at java.lang.Thread.run(Thread.java:680)

java.lang.NullPointerException

at ddf.minim.javasound.JSBaseAudioRecordingStream.close(Unknown Source)

at ddf.minim.AudioPlayer.close(Unknown Source)

at dynamite_juggle$Audio.close(dynamite_juggle.java:563)

at dynamite_juggle.stop(dynamite_juggle.java:350)

at dynamite_juggle$1.run(dynamite_juggle.java:707)

at java.lang.Thread.run(Thread.java:680)

java.lang.NullPointerException

at ddf.minim.javasound.JSBaseAudioRecordingStream.close(Unknown Source)

at ddf.minim.AudioPlayer.close(Unknown Source)

at dynamite_juggle$Audio.close(dynamite_juggle.java:563)

at dynamite_juggle.stop(dynamite_juggle.java:350)

at dynamite_juggle$1.run(dynamite_juggle.java:707)

at java.lang.Thread.run(Thread.java:680)

java.lang.NullPointerException

at ddf.minim.javasound.JSBaseAudioRecordingStream.close(Unknown Source)

at ddf.minim.AudioPlayer.close(Unknown Source)

at dynamite_juggle$Audio.close(dynamite_juggle.java:563)

at dynamite_juggle.stop(dynamite_juggle.java:350)

at dynamite_juggle$1.run(dynamite_juggle.java:707)

at java.lang.Thread.run(Thread.java:680)

Here are some relevant bits of my code:

Sound class

import ddf.minim.*;
import java.io.File;
class Audio {
private String folder, extension;
HashMap<String, AudioPlayer> audioPlayers;
Audio(String _folder, String _extension) {
folder = _folder;
extension = _extension;
int _fileCount = countFiles(_folder, _extension);
audioPlayers = new HashMap<String, AudioPlayer>(_fileCount);
loadFiles(_folder, _extension);
}
[playback functions...]
void close() {
println("Closing all players");
for (String _key: audioPlayers.keySet()) {
AudioPlayer _player = getAudioPlayer(_key);
if (null!=_player) { // Is there a value at that key?
println("closing \""+ _key +"\" AudioPlayer...");
try {
_player.close();
}
catch (Exception ex) {
println("Could not close player \""+_key+"\"");
}
}
}
}
[loading and file handling functions...]

Exit handler

private void prepareExitHandler () {
Runtime.getRuntime().addShutdownHook(new Thread(new Runnable() {
public void run () {
//System.out.println("SHUTDOWN HOOK");
try {
stop();
} catch (Exception ex){
ex.printStackTrace(); // not much else to do at this point
}
}
}));
}

Stop() function

// This is called on exit
void stop() {
println("Shuting down");
audio.close();
minim.stop(); // close minim
super.stop();
}

I could really use some help.

Thanks.

sableRaph

Re: Minim, close sound file

10 months ago

Could this thread from the old forum be still relevant?

Threading issue in Minim: http://processing.org/discourse/beta/num_1246630943.html

Could this mean that 2.0b7 does not include a fix for that issue yet?

Some solutions are suggested in this thread: https://forum.processing.org/topic/audioplayer-close-nullpointerexception

1) Adding exit() at the end of the stop() function.

Crashes the sketch on exit.

2) Changing the name of the stop() function to something else.

Did not work for me. What it did though was changing the order of the errors I get:

closing "arm" AudioPlayer...

java.lang.NullPointerException

at ddf.minim.javasound.JSBaseAudioRecordingStream.close(Unknown Source)

at ddf.minim.AudioPlayer.close(Unknown Source)

at dynamite_juggle$Audio.close(dynamite_juggle.java:563)

at dynamite_juggle.cleanUpAndClose(dynamite_juggle.java:351)

at dynamite_juggle$1.run(dynamite_juggle.java:707)

at java.lang.Thread.run(Thread.java:680)

closing "burn" AudioPlayer...

java.lang.NullPointerException

at ddf.minim.javasound.JSBaseAudioRecordingStream.close(Unknown Source)

at ddf.minim.AudioPlayer.close(Unknown Source)

at dynamite_juggle$Audio.close(dynamite_juggle.java:563)

at dynamite_juggle.cleanUpAndClose(dynamite_juggle.java:351)

at dynamite_juggle$1.run(dynamite_juggle.java:707)

at java.lang.Thread.run(Thread.java:680)

closing "blast" AudioPlayer...

java.lang.NullPointerException

at ddf.minim.javasound.JSBaseAudioRecordingStream.close(Unknown Source)

at ddf.minim.AudioPlayer.close(Unknown Source)

at dynamite_juggle$Audio.close(dynamite_juggle.java:563)

at dynamite_juggle.cleanUpAndClose(dynamite_juggle.java:351)

at dynamite_juggle$1.run(dynamite_juggle.java:707)

at java.lang.Thread.run(Thread.java:680)

closing "fuse" AudioPlayer...

java.lang.NullPointerException

at ddf.minim.javasound.JSBaseAudioRecordingStream.close(Unknown Source)

at ddf.minim.AudioPlayer.close(Unknown Source)

at dynamite_juggle$Audio.close(dynamite_juggle.java:563)

at dynamite_juggle.cleanUpAndClose(dynamite_juggle.java:351)

at dynamite_juggle$1.run(dynamite_juggle.java:707)

at java.lang.Thread.run(Thread.java:680)

closing "ignite" AudioPlayer...

java.lang.NullPointerException

at ddf.minim.javasound.JSBaseAudioRecordingStream.close(Unknown Source)

at ddf.minim.AudioPlayer.close(Unknown Source)

at dynamite_juggle$Audio.close(dynamite_juggle.java:563)

at dynamite_juggle.cleanUpAndClose(dynamite_juggle.java:351)

at dynamite_juggle$1.run(dynamite_juggle.java:707)

at java.lang.Thread.run(Thread.java:680)

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