Pd-dev January 2020

pd-dev@lists.iem.at

9 participants
10 discussions

Doppler effect implementation
by Frodo Jedi 01 May '22

01 May '22

Hi all, I am searching for a Pd implementation of a doppler effect as realistic as possible. Any recommendations? Any patch/external already made and well tested? Cheers FJ

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macOS direct plist reading
by Dan Wilcox 24 Feb '20

24 Feb '20

Howdy all, Pd's start time on macOS has always felt a bit *slow*. Recently, someone on the pd-list noticed starting Pd with -noprefs helps a great deal. I did some digging and the core basically performs a system call to the "defaults" command for *each* key/value in s_file.c, including a stat() check if the preferences file exists. That's a good amount of filesystem IO and probably explains why it takes *3-4 seconds* on my machine. For a proposed update to fix this, I just got some code working which reads the plist into a dictionary object directly using the macOS CoreFoundation framework (all C). Reading keys and values is then much faster and Pd starts up almost instantaneously now. Next step would be to updating preference saving as well. I hope to finalize this and put it up as a PR in a week or two for testing. -------- Dan Wilcox @danomatika <http://twitter.com/danomatika> danomatika.com <http://danomatika.com/> robotcowboy.com <http://robotcowboy.com/>

5 9

array/table and canvas memory management
by x nor 30 Jan '20

30 Jan '20

I'm working on an external that loads analysis data into tables for use in re-synthesis and I want to make sure I'm not going to be leaking memory with this approach. I'd like to be able to load several sets of tables with a single object, and then access that data with an arbitrary number of resynthizers. So my question is: if I allocate an array/table in an external, do I have to manage its de-allocation or is there some sort of reference counter? How about with canvases? If I create a canvas per analysis data set, do I have to manage the canvas de-allocation? If I de-allocate an array (inside a canvas I create in code or not) and some other object is using that array, what happens? Thanks, Ale

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soundfile updates
by Dan Wilcox 29 Jan '20

29 Jan '20

Howdy all, I have completed the first draft of updates to d_soundfile.c which consist of a branch refactoring the format-specific code into separate implementation files: https://github.com/pure-data/pure-data/pull/855 <https://github.com/pure-data/pure-data/pull/855> And a second branch which adds support for CAF files: https://github.com/pure-data/pure-data/pull/879 <https://github.com/pure-data/pure-data/pull/879> This work isn't done yet, but it's at the stage where it would be helpful to get feedback and some testing. -------- Dan Wilcox @danomatika <http://twitter.com/danomatika> danomatika.com <http://danomatika.com/> robotcowboy.com <http://robotcowboy.com/>

1 0

Question about MIDI/XML
by Mariana Vieira 22 Jan '20

22 Jan '20

Hi, my name is Mariana and i have a ask, please: I would like to know if I can create MIDI/XML music plays using Pure Data, I am asking why I have not found examples of this type on the Internet in Pure Data to study, thank you *Image is just to show an example: [image: Midi-Sheet-Music_1.png] Att., Mariana Vieira Celular:+55 (11) 95846-3108 Tim/WhatsApp Celular:+1 (757) 351-0702 WhatsApp Business MeuPlayStore <https://play.google.com/store/apps/dev?id=5141873186713129352&hl=pt-BR> | MeuAppStore <https://apps.apple.com/us/developer/edinesoft/id1485739472?l=pt> Site: https://www.edinesoft.com.br E-mail: contato(a)edinesoft.com.br CNPJ: 34.870.228/0001-54

1 0

Fwd: capabilities of data structures with externals
by João Pais 04 Jan '20

04 Jan '20

[this mail was bounced, so it arrives a bit late to the thread] Not sure if this makes sense, but: - are you using data structures graphically, or just to store data? Once you have the model, are data structures really necessary anymore? Gem is much faster if you only need to show the data, but don't need the interaction. - [array]'s helpfile show how to get/set data from data structures. That could copy the data to normal arrays, so that they're accessed by [tabread~] - or see if Miller can add a -s flag to [tabread~] and similars, as it was done with [array] jmmmp Am Fr., 3. Jan. 2020 um 18:05 Uhr schrieb x nor <x37v.alex(a)gmail.com>: > This past week I've finally learned a bit more about data structures in PD > and I've successfully created my own data structures that model data from > ATS files (sines + noise analysis models). > The re-synthesis ended up being a bit heavy because I didn't see a way to > use tabread~/tabread4~ directly with arrays of complex data, so I patched > some helpers that iterate the data structures and create float arrays from > the fields as needed. > > I'm wondering if I can replace this with an external that deals with these > details internally so I have a few questions before I go down that road: > > 1) I see that I can register "pointer" methods for externals.. my > structure has a field that stores an array that stores arrays of structs, > can I expect to be able to get to that data in an external? Any examples? > 2) If I am able to get to the data, can I mark it as 'used for dsp' > somehow like i see you can do for garrays, and then use it within a dsp > callback 'safely' or do i need to copy the data into separate float arrays > to do that?.. maybe i should reorganize the data so that I don't have to do > the copy, but if I end up creating a bunch of float arrays to model the > data inside my data structure, can I then somehow treat it as a "garray" > and mark it used in dsp and use it in my dsp method? > > Thanks, > Alex > _______________________________________________ > Pd-dev mailing list > Pd-dev(a)lists.iem.at > https://lists.puredata.info/listinfo/pd-dev >

3 5

capabilities of data structures with externals
by x nor 04 Jan '20

04 Jan '20

This past week I've finally learned a bit more about data structures in PD and I've successfully created my own data structures that model data from ATS files (sines + noise analysis models). The re-synthesis ended up being a bit heavy because I didn't see a way to use tabread~/tabread4~ directly with arrays of complex data, so I patched some helpers that iterate the data structures and create float arrays from the fields as needed. I'm wondering if I can replace this with an external that deals with these details internally so I have a few questions before I go down that road: 1) I see that I can register "pointer" methods for externals.. my structure has a field that stores an array that stores arrays of structs, can I expect to be able to get to that data in an external? Any examples? 2) If I am able to get to the data, can I mark it as 'used for dsp' somehow like i see you can do for garrays, and then use it within a dsp callback 'safely' or do i need to copy the data into separate float arrays to do that?.. maybe i should reorganize the data so that I don't have to do the copy, but if I end up creating a bunch of float arrays to model the data inside my data structure, can I then somehow treat it as a "garray" and mark it used in dsp and use it in my dsp method? Thanks, Alex

3 10

Re: [PD-dev] capabilities of data structures with externals
by Dan Wilcox 04 Jan '20

04 Jan '20

lua ... tiny, fast, simple, C-focused, portable There is already the pdlua implementation as well which is focused on writing externals. I imagine most of the ds, array, etc API could be exposed to lua. > On Jan 4, 2020, at 1:14 AM, pd-dev-request(a)lists.iem.at wrote: > > It seems to me that patch languages are badly suited to this kind of task - > but if one were to design a text-language style interface, what language > would be suitable? Or indeed is there a compleetely different way to think > about it? -------- Dan Wilcox @danomatika <http://twitter.com/danomatika> danomatika.com <http://danomatika.com/> robotcowboy.com <http://robotcowboy.com/>

2 1

Re: [PD-dev] capabilities of data structures with externals
by João Pais 04 Jan '20

04 Jan '20

maybe not exactly the goal here but: if get/set would need only the name of the variables and not the template, it would make it somewhat easier to use the same patch for different purposes. e.g. [get x y z] instead of [get somenameherewhichcanbeusedonlyinonespecificpatch x y z] I guess an other way of making it faster to use pointers in complex situations would be to assign pre-defined symbol-names to pointers (which would be fixed like any other variable), instead of the codes assigned internally - but maybe that's not really feasible to program. And to add my two cents - >> >> The "pointer/get/set" approach to manipulating data is horribly clunky, >> both unintuitive and inefficient. If you can think of a better way I'd >> love to hear it. >> >> It seems to me that patch languages are badly suited to this kind of task >> - >> but if one were to design a text-language style interface, what language >> would be suitable? Or indeed is there a compleetely different way to >> think >> about it? I've been wondering about this since Pd's start around 1997 :) > >

2 1

algo for sequencing merges
by Miller Puckette 02 Jan '20

02 Jan '20

To pd dev My default sort algorithm for merging pull requests is oldest to newest. I'm making a minor exception to this in taking on the Mac plist thing (I hate all things Mac and thus am gratefully taking on Mac-specific PRs with no testing) and then, for a wholly different reason, merging the netsend/ netreceive rewrite (as being something less expert about than the author) and thinking that getting up to date on network is an adaptation issue and not a design enhancement to Pd proper. Let me know if one of your PRs is indeed just adaptation and not design and I'll consider jumping the queue on it like I did these. Otherwise I think I'll crawl through the 73 remaining PRs as best I can in chronological order. Meanwhile I have changes I want to make - still agonizing over these. cheers Miller

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Pd-dev January 2020