receive osc

michizac · April 2016

I am having troubles receiving messages with the oscP5 library. from the Java example, I got this setup in python

        from oscP5 import *
        from netP5 import * 



        print 
        def setup():
            size(400, 400)
            background(0)
            port1 = 12000
            oscP5 = OscP5(this, port1)
            loc = NetAddress('127.0.0.1', 12000)


        def draw():pass 



        def oscEvent(OscMessage):
           msg = OscMessage
           print "### received an osc message." 
           print  " addrpattern: %s " % msg.addrPattern()
           print  " typetag:%s " % msg.typetag()

While sending messages works fine, for some reason this doesn't. I think there is something wrong with the way I assign the value in the oscEvent function. Any idea? Thanks

michizac · April 2016

FYI this is the Java sketch where I got the oscEvent function

`/**
 * oscP5sendreceive by andreas schlegel
 * example shows how to send and receive osc messages.
 * oscP5 website at http://www.sojamo.de/oscP5
 */


OscP5 oscP5;
NetAddress myRemoteLocation;

void setup() {
  size(400,400);
  frameRate(25);
  /* start oscP5, listening for incoming messages at port 12000 */
  oscP5 = new OscP5(this,12000);

  /* myRemoteLocation is a NetAddress. a NetAddress takes 2 parameters,
   * an ip address and a port number. myRemoteLocation is used as parameter in
   * oscP5.send() when sending osc packets to another computer, device, 
   * application. usage see below. for testing purposes the listening port
   * and the port of the remote location address are the same, hence you will
   * send messages back to this sketch.
   */
  myRemoteLocation = new NetAddress("127.0.0.1",12000);
}


void draw() {
  background(0);  
}

void mousePressed() {
  /* in the following different ways of creating osc messages are shown by example */
  OscMessage myMessage = new OscMessage("/test");

  myMessage.add(123); /* add an int 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());
}`

GoToLoop · April 2016

Go here: https://github.com/jdf/Processing.py-Bugs/issues/157
And demand the same fix done for serialEvent() to oscEvent() callback too. >-)

michizac · April 2016

Will do! Thanks.

sojamo · April 2016

hi, I am not too familiar with the python mode but give the following a go. I have tested this with oscP5 version 0.9.9 and 2.0.4, sending and receiving worked fine.

# tested with oscP5 0.9.9 and 2.0.4 
add_library('oscP5') 

addr = "?"

class Listen(OscEventListener):
    def oscEvent(self,m):
        global col, addr
        col = m.arguments()[0]
        # col = int(m.arguments()[0])
        addr = m.addrPattern()
        print("Listen.oscEvent",m.addrPattern(), m.arguments())

def setup():
    global osc, loc, col
    size(600, 600, P3D)
    osc = OscP5(this, 12000)
    loc = NetAddress('127.0.0.1', 12000) # send to self
    osc.addListener(Listen()) # assigning a listener to class Listen
    col = 100

def draw():
    global col,addr
    background(col)
    print(addr)

def keyPressed():
    global osc,loc
    msg = OscMessage("/test")
    msg.add(random(255))
    osc.send(msg,loc)
    print("sending message",msg.addrPattern())

def stop():
    global osc
    osc.dispose()

giving the following a try with oscP5 2.0.4 also worked, in the code below a listener is directly assigned to a function (oscEvent)

# in this example a listener is assigned to function oscEvent
# assigning a function as listener only works with 2.0.4 not 0.9.9

add_library('oscP5') 

def setup():
    global osc, loc, col
    size(600, 600, P3D)
    osc = OscP5(this, 12000) # send to self
    loc = NetAddress('127.0.0.1', 12000)
    osc.addListener(oscEvent) # assigning a listener to function oscEvent
    col = 100

def draw():
    global col
    background(col)

def oscEvent(m):
    global col
    col = m.arguments()[0]
    # col = int(m.arguments()[0])
    print("oscEvent",m.addrPattern(), m.arguments())

def keyPressed():
    global osc,loc
    msg = OscMessage("/test")
    msg.add(random(255))
    osc.send(msg,loc)
    print("sending message",msg.addrPattern())

def stop():
    global osc
    osc.dispose()

Also make sure that the udp port must be closed when exiting the sketch, so that it is not blocked when re-running the sketch. This is taken care of calling osc.dispose() from inside the stop() function

Note: an earlier version of the examples above used m.getArguments() which is only implemented for 2.0.4 but not 0.9.9 which caused the examples not to run under 0.9.9. this has been highlighted in the discussion below. m.getArguments() was then replaced by m.arguments().

michizac · April 2016

Thank you so much! I was really struggling here. FYI: The first solution works great while the second does not let me assign oscEvent as an argument to addListener.

michizac · April 2016

One last question: how do I get the oscEvent function in the Listen class to return the value received (first example)? I tried to return it with the addrPattern method but, while printing works, I can't get it to be assigned to a sketch variable...

sojamo · April 2016

I have made adjustments to my previous post, have a look. the code snippets now also show how to transfer and store an osc argument inside a global variable (here col).

GoToLoop · April 2016

@sojamo, strangely your 1st example doesn't trigger the oscEvent() for me. It only sends. :(
Also I've tweaked it a little but no success.
For me it seems I'm forced to await for the actual oscEvent() fix. ~:>

# forum.Processing.org/two/discussion/15995/receive-osc#Item_8
# 2016-Apr-14

add_library('oscP5')

PORT, gray = 12000, 0200

def setup():
    size(600, 400)
    smooth(4)
    noLoop()
    frameRate(15)

    global osc, loc, msg
    osc = OscP5(this, PORT)
    loc = NetAddress('127.0.0.1', PORT)
    msg = OscMessage('/test')

    osc.addListener(MyOscListener())
    print osc.listeners(), PORT


def draw():
    background(gray)
    frame.setTitle('Grey Color: ' + `gray`)


def mousePressed(): keyPressed()

def keyPressed():
    if 'msg' not in globals(): return

    msg.clearArguments()
    msg.add(int(random(0400)))

    print 'Sending gray color message:', msg.arguments()[0]
    osc.send(msg, loc)


class MyOscListener(OscEventListener):
    @staticmethod
    def oscEvent(m):
        global gray
        gray = m.arguments()[0]

        redraw()
        print 'Received oscEvent:', m.addrPattern(), gray, m.typetag()

sojamo · April 2016

works for me on osx and processing 3.0.2, your example also works fine.

GoToLoop · April 2016

Win 7, 64-bit P5 v3.0.2 and Osc v0.9.9. :-<

GoToLoop · April 2016

If I close all the PDEs (or kill all "java.exe" processes, keeping "javaw.exe" though) and re-run it and paste the code, at the 1st run I've got this after keyPressed():

processing.app.SketchException: AttributeError: 
  'oscP5.OscMessage' object has no attribute 'getArguments'
    at jycessing.mode.run.SketchRunner.convertPythonSketchError(SketchRunner.java:248)
    at jycessing.mode.run.SketchRunner.access$4(SketchRunner.java:227)
    at jycessing.mode.run.SketchRunner$3.run(SketchRunner.java:122)
    at java.lang.Thread.run(Thread.java:745)

On subsequent re-runs the sketch executes. But no oscEvent() triggers at all! :-&

GoToLoop · April 2016

If I comment out #gray = m.getArguments()[0], the oscEvent() trigger is called back successfully! @-)

GoToLoop · April 2016

Found out the culprit: Indeed there's no method called getArguments() in class OscMessage! =P~
Since I was following your template like this 1: col = m.getArguments()[0], I've ended up incurring in error! No idea why you were immune to it though. 8-}
Funnily, I did the right thing in my own keyPressed() before typing in the class:
print 'Sending gray color message:', msg.arguments()[0]
B/c I've looked up the class' reference before using the method: ;))
http://www.Sojamo.de/libraries/oscp5/reference/oscP5/OscMessage.html#arguments()

P.S.: Once any error occurs in the OscEventListener, I've gotta close all PDEs or kill all "java.exe". Otherwise Python mode doesn't see any further editing made to the class! :(|)

michizac · April 2016

I was running into the same problem of GoToLoop, now fixed. Thank you all for taking care of this issue!!

sojamo · April 2016

hi, sorry, my bad. when editing and updating my post from above, I did check the example only against oscP5 2.0.4 and later not 0.9.9 which is the version currently available from the library manager. getArguments() is only implemented with 2.0.4 and not 0.9.9. arguments() is available with both versions. I have made updates to my previous post to make the examples work for both versions, I have left a remark that mentions the change from getArguments() to arguments().

michizac · April 2016

great

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