[PD-dev] sensing events

[Miller Puckette]

Hi Krzysztof,

There's no way to get an "event number" but there should be...  I'm trying
to stop adding things to PD 0.35 and just get it all working at the same time,
but the fix is probably just to increment an integer every time 
outlet_setstacklim() gets called.

MIDI input should indeed call outlet_setstacklim(), it's a bug if it doesn't
which I'll go fix...

cheers
Miller

On Fri, May 31, 2002 at 12:43:12PM +0200, Krzysztof Czaja wrote:
> hi,
> 
> how best to define a ``control event'' in Pd?
> 
> I am trying to put 'cycle' into cyclone now.  I need to know,
> how to sense, that successive messages belong to the same event.
> This `event-sensitive' mode is so described in the max4 manual:
> 
> ``cycle detects separate events and restarts at the leftmost
> outlet when a new event occurs. Examples of separate events
> include messages with delays between them, and messages triggered
> by successive mouse clicks or MIDI events. A stream of items
> separated by commas in a message box is considered a single
> event.''
> 
> In a preliminary version I have simply used clock_getlogicaltime(),
> comparing logical times, but to handle it properly, one probably
> needs to distinguish between separate clocks or midi data tagged
> with the same time stamp, and also between different bits of data
> coming through sockets at the same time, like mouse, keyboard and
> net.
> 
> In the Pd scheduler I found a call, outlet_setstacklim(), which
> seems to be invoked before processing almost any new `event'
> (except midi -- wonder why?).  At least this is my understanding
> of the actual meaning of an `event'.  But this call's sole
> job is to set a mark used in preventing recursive patches from
> overflowing the stack.
> 
> Is there any way in which an external might get a clue?
> 
> Krzysztof
> 
> 
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