Forums > MaxMSP

documentation for what udpsend sends

November 30, 2011 | 2:48 pm

I’m sending messages via udpsend and receiving them in Processing. Here are some examples of how the messages arrive:

(hello) => "hello***,***";
(hello world) => "hello***,s***world***";
(list hello world) => "list****,ss*hello***world***";
(list "hello, world") => "list****,s**hello, world*";
(list hello, world) => "list****,s**hello***" followed by "world***,***";

Where * = null byte.

I think I’ve figured out what’s happening here.* But does anybody know where this is actually documented?

*For the curious: Seems to be a series of c strings, each padded out to a multiple of 4 bytes. The first string is the "message name", the second is a comma followed by one letter for each arg (s, i, or f). The rest are the args. In the last example, the comma causes two separate messages to be sent.


November 30, 2011 | 5:27 pm

Apparently the messages are sent in OSC format as documented here

http://opensoundcontrol.org/spec-1_0


December 1, 2011 | 8:28 am

Hi skot,

for a network binding that wouldn’t use OSC, I’d encourage you to check out the set of network objects (UDP/TCP Sender/Receiver) from my library ( http://www.sadam.hu/software ). These objects will send and receive pure binary streams without any additional encoding.

Hope that helps,
Ádám


December 1, 2011 | 3:45 pm

Or, use OSC in processing:

http://www.sojamo.de/libraries/oscP5/index.html

mz


Viewing 4 posts - 1 through 4 (of 4 total)