Pd-dev

pd-dev@lists.iem.at

2 participants
9620 discussions

Re: [PD-dev] [PD] Ability to access error messages from patch
by Christof Ressi 14 Jun '21

14 Jun '21

> i quite like the idea of having a canvas-scope for such an object. Personally, I would rather prefer that if the error code would be simply output by the same object that generated the error. > On 6/14/21 10:37 AM, Peter P. wrote: > > Yes, that's a good idea, but what if there are two identical objects > > on the same canvas? > > i think that would be *your* problem. > if you want to catch error messages from two instances of the same > objectclass, just put them into separate canvases. > simple as that. I think Peter's concern is valid and it's actually another reason why I wouldn't like such a design. --- Here's another idea, which I don't really love, but which I would prefer over your proposed [canvaserror]: Method calls which can generate an error send the error code to a global [errno] object and the user can query the current error state with a bang. This would be similar to 'errno' in C. If the user queries the errno immediately after the method call, Pd's determinism guarantees that the error really belongs to that method call. We would have to reserve a special value (e.g. "0") to mean "no error". My main point is that errors should not be *sent* by global or canvas-local objects, but that they should be *queried*. This way the user doesn't have to deal with cross talk between different objects. Christof On 14.06.2021 13:29, IOhannes m zmoelnig wrote: > On 6/14/21 10:23 AM, Roman Haefeli wrote: >> On Mon, 2021-06-14 at 10:02 +0200, Peter P. wrote: >> >>> I am wondering how one would >>> parse these error messages if they came from one single object outlet >>> to >>> tell where the error originated from? >> >> I am wondering about that, too. Maybe a [pderror] would be canvas-local >> and only report errors from objects belonging to the local canvas? And >> it would prepend the name of the object to the message? > > i quite like the idea of having a canvas-scope for such an object. > > however, i think [pderror] is a bad name, as i would expect this > object to be usable for *generating* errors (ala [print]), rather than > outputting them. > > anyhow, i think the proposal maps nicely to what other languages offer > as "exception handling". > from that pov, a good name would be [catch] (which would be *very* > good, if, alas! that weren't already occupied by the similarly named > but totally different [catch~]), or [except] (but i somehow have the > feeling that this would need some explicit *connection* to the object > that is bailing out). > > with iemgut's in mind, i would go for [canvaserror] (or, for a more > general case: [canvasconsole]). > > On 6/14/21 10:37 AM, Peter P. wrote: > > Yes, that's a good idea, but what if there are two identical objects > > on the same canvas? > > i think that would be *your* problem. > if you want to catch error messages from two instances of the same > objectclass, just put them into separate canvases. > simple as that. > > e.g. cf the python code > ``` > try: > x=int("foo") > y=int("bar") > except: > print("one of the two conversions failed") > ``` > > > while thinking about the exception analogy, it might be interesting to > be able to re-throw an error message: > if you don't want to hande the error in your canvas, you can just pass > it on to the parent canvas by sending it to an [error] object. > > the same could apply to [print], which can be considered just as a > "low-priority error". > > fgmdsr > IOhannes > > > _______________________________________________ > Pd-list(a)lists.iem.at mailing list > UNSUBSCRIBE and account-management -> https://lists.puredata.info/listinfo/pd-list

1 0

dlopen error _class_addlist
by Dan Wilcox 13 Jun '21

13 Jun '21

Howdy all, I'm building an application which uses libpd and a couple pre-compiled externals as universal macOS app for x86_64 and arm64 (new Apple CPU). So far, building and signing etc is working but now I'm running into an issue when the externals are being loaded on arm64: Pd: error:../pd/zirkhoa.d_fat: dlopen(.../pd/zirkhoa.d_fat, 10): Symbol not found: _class_addlist Referenced from:.../pd/zirkhoa.d_fat Expected in: flat namespace in .../pd/zirkhoa.d_fat None of the external sources use class_addlist, so I assume that's something internal? Could this be an issue with the new architecture within libpd / the pd core? The x86_64 builds run fine on Intel machines. -------- Dan Wilcox @danomatika <http://twitter.com/danomatika> danomatika.com <http://danomatika.com/> robotcowboy.com <http://robotcowboy.com/>

2 3

s4pd help: portable uid-like thing in C?
by Iain Duncan 12 Jun '21

12 Jun '21

Hi folks, i'm wrestling away with the schedule functions for Scheme-for-Pd, and I think I can make things a lot more reliable if I let every instantiation (or restart) of the scheme interpreter have a uid of some sort so that on a reset we can just ignore clocks running out on a previous instance instead of trying to clean them all up with manual memory management. (which approach is giving me segfaults because I'm screwing something up) Can anyone tell me what a smart way of getting a unique identifier would be? It doesn't need to be unique across the world, just the local machine, so something that was seeded from system time would be fine. I'm not a Real C Programmer though, so am not clear what options will just work across all OS's, without needing to add dependencies. thanks!

2 2

More clock questions
by Iain Duncan 12 Jun '21

12 Jun '21

I have a couple more clock/schedule related questions after rereading the comments from Miller and Seb. 1) Is the Pd clock scheduler only accurate to the ms or does it operate at higher than ms accuracy? (As in, if I wanted to role my own mechanism closer to what Seb did, how frequently should my master time go off?) 2) Miller made reference to the linked list of clocks that pd iterates through. Is that something I could access directly? (and if so, where would it live? 3) if anyone knows good books or online resources for learning more about writing scheduler related code, I'm all ears! :-) thanks iain

2 1

Scheme-for-Pd, how to release beta versions, call for testers
by Iain Duncan 11 Jun '21

11 Jun '21

Hi folks, I'm only a few days away (I think!) from a first beta release for Scheme-for-Pd, and am wondering what I'm supposed to do for releasing to the early testers given I don't want to put it on Deken until it's had the tires well kicked... Things I need to sort - answers or pointers to where to read both appreciated: Is it pretty common that people know how to build or should I prepare a binary for OSX and Windows? If so, how is that normally bundled up? I need people to have external, the help patcher and also a set of scm files on their pd search path for it all to work. Is there anyone who would be interested in testing out building and running, both from zipped up packages and cloning and building? There's a pretty extensive help file, and everything in it should "just work". (haha, we'll see about that!) thanks iain

3 3

using the PD filepath in an external?
by Iain Duncan 10 Jun '21

10 Jun '21

Hi folks, I tried to google this, but of course am swamped with results on how to load things in the patcher instead of what I'm looking for. Can anyone point me at how to use the filepath to load files in an external? In Max I have s4m find the fullpath for the bootstrap files and then load them up through s7s native load function with the fullpath. If anyone has an example of something similar for Pd, that would be lovely! thanks

2 7

Creating delayed functions in Pd external?
by Iain Duncan 09 Jun '21

09 Jun '21

Hi folks, I'm hoping someone can point me in the right direction here. I'm porting Scheme for Max to pure data and I'm stuck figuring out how to get delayed functions going. In Max, the SDK has a facility to make register a callback to executed at some point in the future, a few different ways. Is there a Pd equivalent, and if so, could anyone point me at resources or code for it? I basically just need to be able to have a callback fire off at the right time with one argument, which can be void pointer to the rest of the stuff i want to get. thanks! iain

3 10

Re: [PD-dev] Pd-dev Digest, Vol 194, Issue 4
by Sebastian Shader 08 Jun '21

08 Jun '21

In my WIP pdlua scripting library https://github.com/sebshader/lscoreI use 1 clock from pdlua for timing but then use my own heap/priority-queue-based scheduler as a wrapper for it.So if I need a new delay/clock I add it to my own scheduling queue, and then the priority queue pops the (next time - current time) for the underlying t_clock that pdlua uses every time a delay occurs.(and then the clocks are used for delays within coroutine yields so you can write music)In my case I also need a lot more manipulations of the scheduling queues though (my next project is to have 1 scheduling queue peraccelerando/ritardando group so a tree of descendants of an ancestor coroutine that sprouted them can accelerando/ritardando together) -Seb -----Original Message----- Date: Sun, 6 Jun 2021 18:52:17 -0700 From: Miller Puckette <msp(a)ucsd.edu> To: Iain Duncan <iainduncanlists(a)gmail.com> Cc: pd-dev <pd-dev(a)lists.iem.at> Subject: Re: [PD-dev] Creating delayed functions in Pd external? Message-ID: <20210607015217.4fb2ym5rl27d7olu(a)ucsd.edu> Content-Type: text/plain; charset=us-ascii Well, Pd's own scheduler for clocks keeps them in a linked list and chases down it to set and unset them. So if you did anything smart for the scheme callbacks Pd would see to it that it's still linear time in the number of active callbacks. cheers M On Sun, Jun 06, 2021 at 06:22:41PM -0700, Iain Duncan wrote: > Thanks Miller. That brings up one more question.. ;-) > > In Scheme for Max, the way I do it is I keep a hash-table in C going > with keys that are created on Scheme delay calls, so that one can cancel > clocks by fetching them from the hashtable. In Max, there's a > cross-platform hash-table implementation that I'm using. Is there something > similar for Pd, or if not, is there an approach you would recommend for > keeping a key-value store in C for the clocks by a symbolic key? I guess a > good question might be if this is even necessary, given there can't be > *that* many clocks scheduled for the future. And association list type > thing might do just as well. > > thanks for the help, it's going well, now that I can finally work on it! > ought to have a first alpha folks can play with in the next couple of weeks. > iain > > > > On Sun, Jun 6, 2021 at 5:36 PM Miller Puckette <msp(a)ucsd.edu> wrote: > > > clock() is the only mechanism - for repeats, the easiest thing is often > > to just re-use a clock() and re-set it each time it goes off (as in > > the metro obejct). You can indeed create clock obejcts on the fly - > > that's what pipe does. But you'll want to keep track of them so you can > > cancel them if the owning object goes away. > > > > cheers > > M > > > > On Sun, Jun 06, 2021 at 05:16:09PM -0700, Iain Duncan wrote: > > > Ah fantastic, thanks. I was looking in pipe and not seeing it, but was > > > probably just lost in other new details and not seeing the forest for the > > > trees. :-) > > > > > > Couple of follow ups: > > > - is there a separate facility for making a repeated callback (ie not > > > one-shot), or does one just do both with clock? > > > - is it safe to make clocks as we need them (ie during a method call, not > > > necessarily at object instantiation time), or is this the kind of thing > > > where for real time use one needs to make a clock pool and a pool manager > > > and all that? > > > > > > thanks! > > > iain > > > > > > On Sun, Jun 6, 2021 at 5:12 PM Miller Puckette <msp(a)ucsd.edu> wrote: > > > > > > > Yep, clock_delay() . Simples example is in Pd's "delay" object, > > x_time.c > > > > > > > > cheers > > > > Miller > > > > > > > > On Sun, Jun 06, 2021 at 04:21:46PM -0700, Iain Duncan wrote: > > > > > Hi folks, I'm hoping someone can point me in the right direction > > here. > > > > I'm > > > > > porting Scheme for Max to pure data and I'm stuck figuring out how > > to get > > > > > delayed functions going. In Max, the SDK has a facility to make > > register > > > > a > > > > > callback to executed at some point in the future, a few different > > ways. > > > > Is > > > > > there a Pd equivalent, and if so, could anyone point me at resources > > or > > > > > code for it? I basically just need to be able to have a callback > > fire > > > > off > > > > > at the right time with one argument, which can be void pointer to the > > > > rest > > > > > of the stuff i want to get. > > > > > > > > > > thanks! > > > > > iain > > > > > > > > > _______________________________________________ > > > > > Pd-dev mailing list > > > > > Pd-dev(a)lists.iem.at > > > > > > > > > > > https://urldefense.proofpoint.com/v2/url?u=https-3A__lists.puredata.info_li… > > > > > > > > > > > > -- > > > > > > > > -- > > -- ------------------------------ Subject: Digest Footer _______________________________________________ Pd-dev mailing list Pd-dev(a)lists.iem.at https://lists.puredata.info/listinfo/pd-dev ------------------------------ End of Pd-dev Digest, Vol 194, Issue 4 **************************************

3 2

[partconv~] limitations
by Gloria Dal Santo 03 May '21

03 May '21

Hi everyone, After playing with partconv~ in other to implement a patch for sound externalization I am asking myself whether what I am trying to do is maybe too much for pure data or not. To sum up, I need to convolve a sound file with a BRIR that is updated whenever the listener moves his head, so that to simulate a fixed sound source. I already have a dataset of 36 impulse responses, each of size 8192 samples. [partconv~] allows to change the impulse response by sending a [set ir_name( message. (For [convolve~] the message would be [set ir_name( ). Unfortunately, as soon as I send the [set _ ( message the audio stopes for a little while. Why is it so? I tried to dig into the code and I guess is simply because the buffers are freed when the set method is called. I tried to define larger buffers so that I can store multiple BRIRs and have access to them without freeing the buffers (even though extra care must be taken in the perform method) but I think I don’t have enough coding skills to do that. I then tried to use 5 [partconv~]s for each channel (thus 10 [partconv~]s) running at the same time with different BRIRs and multiplexing between them. The idea is that of switching between the outputs of the [partconv~] that are not updating their BRIRs, while one of the [partconv~] is actually updating it according to the direction of the head. To achieve this I’m using the [mux~] object. The idea seems working, but it actually doesn’t. When I switch between [mux~] inputs sometimes I get clicks. On the spectrogram these look like vertical lines of constant values (like noise). What could be the reason? Do you think that having 10 [partconv~] running at the same time is too much? Thank you in advance for your time, With my best regard, Gloria

3 2

Re: [PD-dev] Polling: Execute a function every X ms from within the external.
by Dan Wilcox 30 Apr '21

30 Apr '21

Maybe this is a good example to add somewhere? > On Apr 30, 2021, at 12:00 PM, pd-dev-request(a)lists.iem.at wrote: > > Message: 2 > Date: Thu, 29 Apr 2021 23:12:12 +0200 > From: Christof Ressi <info(a)christofressi.com <mailto:info@christofressi.com>> > To: pd-dev <pd-dev(a)lists.iem.at <mailto:pd-dev@lists.iem.at>> > Subject: Re: [PD-dev] Polling: Execute a function every X ms from > within the external. > Message-ID: <eb2b0430-8d03-96ed-45de-2555e9321b73(a)christofressi.com <mailto:eb2b0430-8d03-96ed-45de-2555e9321b73@christofressi.com>> > Content-Type: text/plain; charset="utf-8"; Format="flowed" > > Here's how: -------- Dan Wilcox @danomatika <http://twitter.com/danomatika> danomatika.com <http://danomatika.com/> robotcowboy.com <http://robotcowboy.com/>

2 2

Jump to page:

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

Pd-dev