sotnickd

I'm struggling with what seems like a fairly simple problem.

I am wanting to de-tokenize (?) a stream of 7-bit integers coming to me via a Sysex stream from a MIDI device. The stream contains delimiters (tokens) which denote which command/opcode to execute, however each opcode has a discreet discrete number of variables. Here's an example input stream:

08 12 09 00 72 101 108 108 111 08 14 09 30 08 12 32 32 32 32 32 10 65 65 127 97

Opcode 08 has a single parameter that follows

Opcode 09 has a single parameter that follows

Opcode 10 has four parameters that follow

ALL other data should be sent as is, but the ABOVE data should be filtered.

Read stream of data; Get an 08, read in the next digit and send it out OUT 1

Get an 09, read in the next digit and send it out OUT 2

Get a 10, read in the next FOUR digits, and send them out OUT 3

Get any other digits, send them out OUT 4.

I have all this built with a state machine, but I'm doing kludgy things like watching for a token, and using that to close a gate, but then having a delay in place to prevent the following digit from going through (i.e. it gets "eaten" by the gate). It works, but it feels wrong.

I have the data in a coll, but finding the logic to, say, find where a "10" token exists, and delete the next 4 digits is not apparent to me.

I also tried using zl objects, but, again trying to use 'sub' to locate the tokens was proving quite difficult.

Any suggestions? I'm a little rusty with Max, but have been using it since 1993 on and off!

Opcode 08 has a single parameter that follows
Opcode 09 has a single parameter that follows
Opcode 10 has four parameters that follow
ALL other data should be sent as is, but the ABOVE data should be filtered.

Read stream of data; Get an 08, read in the next digit and send it out OUT 1
Get an 09, read in the next digit and send it out OUT 2
Get a 10, read in the next FOUR digits, and send them out OUT 3
Get any other digits, send them out OUT 4.

detokenizing-stream-of-numbers

Got this figured out. Solutions often fall into your lap when you ask others for help :)

This is one of those situations when Java or Javascript might be more straightforward than Max. But it's not all that ghastly in Max. Here's what I think is about the simplest way (which I think also pretty much illustrates how one might do it in a text-based language).

Thanks! I had forgotten that gate has arguments, turning them into multi-output gates. Pretty slick!

detokenizing stream of numbers