Send Long and HashMap via OSC

Contributed Library Questions

paperized

Send Long and HashMap via OSC

in Contributed Library Questions • 1 year ago

hello,

I got a problem sending a long via OSC. Is there also some way to send

a HashMap with an <Long, PVector> inside via OSC? Following the code

with an simple long = 0:

import oscP5.*;
import netP5.*;
// OSC
OscP5 oscP5;
NetAddress myRemoteLocation;
long ID = 0;
PVector handPos = new PVector();
void setup()
{
size(640, 480);
colorMode(HSB, 360, 100, 100);
background(0, 0, 20);
// setup OSC
oscP5 = new OscP5(this,12000);
myRemoteLocation = new NetAddress("127.0.0.1",12000);
}
void draw()
{
}
void mousePressed() {
/* in the following different ways of creating osc messages are shown by example */
OscMessage myMessage = new OscMessage("/test");
myMessage.add(ID); /* add a long array to the osc message */
/* send the message */
oscP5.send(myMessage, myRemoteLocation);
}
/* incoming osc message are forwarded to the oscEvent method. */
void oscEvent(OscMessage theOscMessage) {
/* print the address pattern and the typetag of the received OscMessage */
print("### received an osc message.");
print(" addrpattern: "+theOscMessage.addrPattern());
println(" typetag: "+theOscMessage.typetag());
println(" value: "+theOscMessage.get(0));
}

This is the error I get:

OscP5 0.9.8 infos, comments, questions at http://www.sojamo.de/oscP5

### [2012/5/22 20:34:32] PROCESS @ OscP5 stopped.

### [2012/5/22 20:34:32] PROCESS @ UdpClient.openSocket udp socket initialized.

### [2012/5/22 20:34:33] PROCESS @ UdpServer.start() new Unicast DatagramSocket created @ port 12000

### [2012/5/22 20:34:33] INFO @ OscP5 is running. you (141.45.202.101) are listening @ port 12000

### [2012/5/22 20:34:33] PROCESS @ UdpServer.run() UdpServer is running @ 12000

### received an osc message. addrpattern: /test typetag: f

### [2012/5/22 20:34:35] ERROR @ OscP5 ERROR. an error occured while forwarding an OscMessage

to a method in your program. please check your code for any

possible errors that might occur in the method where incoming

OscMessages are parsed e.g. check for casting errors, possible

nullpointers, array overflows ... .

method in charge : oscEvent java.lang.reflect.InvocationTargetException

Replies(3)

Jonny Stu..

Re: Send Long and HashMap via OSC

1 year ago

The OSC protocol supports strings, float, 32 bit ints and binary blobs so you're never going to be able to transmit a long directly. Looking at your example, the oscp5 library should probably throw an error when you call .add with a long as the argument.

I've not done this personally but you might be able to transmit arbitrary data by using java's serialization methods to convert objects into binary arrays. This stack overflow answer might help to get you started: http://stackoverflow.com/questions/2836646/java-serializable-object-to-byte-array

paperized

Re: Send Long and HashMap via OSC

1 year ago

Thanks for your reply. I've "solved" the problem by converting the long to an int. The magnitude of an int should work as well (for handIDs with Kinect/NITE) … so why get a headache with a long, when an int works as well.

Jonny Stu..

Re: Send Long and HashMap via OSC

1 year ago

Nothing wrong with a bit of pragmatism from time to time :)

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