Dear list.
I'm working on a Pd external (https://github.com/AudioSceneDescriptionFormat/asdf-rust/tree/master/pure-da...) which uses class_addmethod() with gensym("dsp") to register a "dsp" function.
I guess this function is called whenever the audio graph changes, and that works fine.
However, my external accepts an "open" message which might allocate a new internal buffer, and I would like Pd to call my dsp function in order to update a few pointers so that the "perform" function can access the new buffer.
So my question is: Can I somehow, after handling my "open" message, force the "dsp" method to be called?
And a related question: What happens when my handling of the "open" message takes longer than expected? Will the "perform" function be called even if the "open" handler isn't finished yet?
Or can I somehow tell Pd that it should stop calling my "perform" function for a little bit while I allocate a new buffer and then tell it to call the "dsp" function and afterwards resume calling the "perform" function?
BTW, with "perform" function I mean the function that has been registered with dsp_addv().
cheers, Matthias