Pd-dev March 2021

pd-dev@lists.iem.at

3 participants
3 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

9 15

symbol comparison vs strcmp()
by IOhannes m zmölnig 11 Mar '21

11 Mar '21

hi all, Pd uses a symbol-table for practically all of its string handling. the main purpose of the the symbol table is, as i understand it, to make string comparison super-fast (as there's no need to compare each character but just a simple address). now, looking at the code i see quite a number of places¹ where something like this is used: > strcmp(atom_getsymbolarg(i, argc, argv)->s_name, refstring); what is the reason for this? is it just out of habit (because in all the other projects you usually use strcmp()) or because this is an attempt to not pollute the symbol table needlessly? or am i missing something? or should they just be replaced with symbol comparisions? gmsadr IOhannes ¹ i've counted about 135 of such uses (automatically; so I certainly missed a few)

2 3

"int argc" giving weird values
by Alexandre Torres Porres 03 Mar '21

03 Mar '21

Hi, been working on a delread/write variation as posted on the pd-list with more features, like freezing. I have a single "del~" object (named like this for now) and I can define if it's "in" (write) or "out" (read). This is like other pd objects like [list]. I do this so I can use pd_findbyclass so I can pair objects by delay line name ([del~ in xxx] and [del~ out xxx]). I read that was the way to do it in some other thread here not long ago. Now, maybe I've seen this weird behaviour before but I can't see what's happening. I have A_GIMME to parse arguments and when trying to print the number of arguments (usually defined as "argc") I don't get the values I expect, but very large and negative ones (what the hell?). I uploaded my prototype just so you can see this and help me figure out where the problem is => https://github.com/porres/pd-else/blob/master/Classes/Source/del~.c here's the global setup function for both objects https://github.com/porres/pd-else/blob/master/Classes/Source/del~.c#L290 here in the "del_new" function, if I query for the number of arguments, I get the weird values already, see https://github.com/porres/pd-else/blob/master/Classes/Source/del~.c#L266 why dear god, why? please please please, it's late and I'm losing sleep thanks

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Pd-dev March 2021