[PD] Checking for interest: Scheme interpreter external for PD

[Iain Duncan]

So if it's a single thread, is there an alternation between dealing with X
event messages and rendering the audio buffer?

thanks

On Fri, Oct 23, 2020 at 4:58 PM Iain Duncan <iainduncanlists at gmail.com>
wrote:

> Oh sweeeet.  Yeah so far it's looking like this will be pretty
> straightforward in comparison. :-)
>
> Can anyone point me at docs or resources on that part of PD? Or do I just
> need to go to the code? I've read through the git repo on learning to write
> an external but didn't see much on how to interact with the scheduler. (the
> stuff that in max uses the clocks and time objects and so on)
>
> Thanks for the feedback everyone! I'm excited to make it happen.
>
> On Fri, Oct 23, 2020 at 4:44 PM Miller Puckette <msp at ucsd.edu> wrote:
>
>> Pd's a single thread - you'll have a much easier time adding stuff to
>> Pd than to Max :)
>>
>> Miller
>>
>> On Fri, Oct 23, 2020 at 12:35:02PM -0700, Iain Duncan wrote:
>> > Hi Andy, well I've ordered your book to learn PD, so I'm at least that
>> > committed! :-)  My overarching goal is to make tools for composing,
>> > improvising, and sequencing, so at this point, I'm punting on signals.
>> > First I want to support everything in Rick Taubes's Notes From the
>> > Metalevel book, along with a bunch of my own ideas, for algorithmic and
>> > computer assisted composition/improvisation. But I am hoping to get
>> signals
>> > into play eventually. Which makes this a good time for a question...
>> >
>> > In Max, my understanding is that if Overdrive is on and Scheduler in
>> > Interrupt is selected,  we actually get only two threads: low priority
>> > thread running who knows when, and high priority thread alternating
>> between
>> > a pass of eating up the scheduler queue (up to the limit) and then a
>> pass
>> > of the audio vector render. So given that I'm forcing all messages to
>> run
>> > in the high priority thread (unless the user asks for danger-mode Any),
>> I
>> > *think* I should have no problem calling into S7 and sharing data from
>> both
>> > dsp perform routines and regular event scheduled messages. I have not,
>> > however, actually done this yet. Can anyone tell me what the situation
>> in
>> > PD is there? Or point me at good docs/resources on how the threading and
>> > scheduling works in PD?
>> >
>> > Thanks
>> > iain
>> >
>> >
>> > On Fri, Oct 23, 2020 at 12:23 PM Andy Farnell <
>> padawan12 at obiwannabe.co.uk>
>> > wrote:
>> >
>> > > My last love affair with parentheses was in Racket.
>> > > Although my only ever somewhat successful musical adventures
>> > > in this style were with Roger Dannenberg's CLM/Nyquist
>> > >
>> > > Lets see what happens if Iain brings S7 over.
>> > >
>> > > Iain, how are you thinking of handling signals
>> > >  (or not)?
>> > >
>> > > andy
>> > >
>> > > On Fri, Oct 23, 2020 at 11:31:48AM +0200, Kjetil Matheussen wrote:
>> > > > On Thu, Oct 22, 2020 at 10:26 AM Andy Farnell
>> > > > <padawan12 at obiwannabe.co.uk> wrote:
>> > > > >
>> > > > > Would love to see Scheme come to Pd.
>> > > > >
>> > > > There's also k_guile from 2004, that still compiles:
>> > > >
>> https://urldefense.com/v3/__https://github.com/kmatheussen/k_guile__;!!Mih3wA!R6td8jy_IlJ5bOCoY02BZdcXbj7A38N3Ca1EA4vlqYbpelSmHtr_uAjQ6hgi$
>> > > > Don't know if it still works though.
>> > > >
>> > > > Guess there are other alternatives as well, but they all probably
>> > > > suffer a bit from gc non-rt performance. To fix this I later
>> extended
>> > > > the code from k_guile to run in a separate thread to avoid cpu
>> spikes,
>> > > > but this code was only added to the snd sound editor (when snd was
>> > > > compiled as a pd external), and that code was probably removed from
>> > > > snd when switching from guile to s7.
>> > > _______________________________________________
>> > > Pd-list at lists.iem.at mailing list
>> > > UNSUBSCRIBE and account-management ->
>> > >
>> https://urldefense.com/v3/__https://lists.puredata.info/listinfo/pd-list__;!!Mih3wA!R6td8jy_IlJ5bOCoY02BZdcXbj7A38N3Ca1EA4vlqYbpelSmHtr_uP-Uh4ph$
>> > >
>>
>> > _______________________________________________
>> > Pd-list at lists.iem.at mailing list
>> > UNSUBSCRIBE and account-management ->
>> https://urldefense.com/v3/__https://lists.puredata.info/listinfo/pd-list__;!!Mih3wA!R6td8jy_IlJ5bOCoY02BZdcXbj7A38N3Ca1EA4vlqYbpelSmHtr_uP-Uh4ph$
>>
>>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.puredata.info/pipermail/pd-list/attachments/20201023/b9551858/attachment.html>