how to create a buffer and change its size

    Alexis Baskind
    Jul 31 2015 | 10:25 am
    Hi all,
    everything is in the title: I'd like to know how to create a buffer on the fly using the sdk, and how to change its size in a safe way. The two examples in the SDK related to buffers (index~ and simpwave~) teach how to read inside preexisting buffers, but not how to create buffers or change its size without requiring an extra buffer~ instance.
    A nasty way would be to use patcher scripting, but I'd like to avoid that if possible.
    Thanks in advance for any useful tips!
    Alexis
    • Emmanuel Jourdan
      It's not necessarily nasty ;-) that's how polybuffer~ works, it creates an embed patcher with a bunch of buffer~ in it.
      Jul 31 2015 | 12:57 pm
    • nonlocality
      edit: nevermind!
      Aug 01 2015 | 3:09 am
    • Alexis Baskind
      Hi Emmanuel,
      Thanks for the tip: I indeed did not think about creating a embedded invisible patcher for this purpose. By "nasty" I was meaning creating a buffer in the parent patcher and dealing with it.
      So I guess I have to get a closer look at the "scripto"' example to learn how to create a new jpatcher instance, something like this:
      x->s_patcher = (t_object *)object_new_typed(CLASS_NOBOX,gensym("jpatcher"),1, &a);
      ... right?
      Best,
      Alexis
      Aug 01 2015 | 10:48 am
    • Emmanuel Jourdan
      You can also create a buffer just like this 
      	t_atom a;
	atom_setsym(&a, gensym("toto"));
	t_object *b = object_new_typed(CLASS_BOX, gensym("buffer~"), 1, &a);
	atom_setsym(&a, gensym("anton.aif"));
	typedmess(b, gensym("replace"), 1, &a);
      Aug 02 2015 | 7:30 pm
    • Alexis Baskind
      Hi Emmanuel,
      Thanks, that's quite helpful. Actually your last solution is the most straightforward equivalent in the new API of the old "newinstance" function. And then, no need for a patcher in my case since I have only one object (this buffer).
      Alexis
      Aug 02 2015 | 9:54 pm