How can I access current module from the source?

[erickskrauch]

Hi.

I'm developing a module that has a filter and a source. They must be interconnected. I assume that the connection should be done through the structure of the module. But I can't find any way how I can get the current module from my filter and source.

OBS has a function obs_current_module(), but it is not suitable for my task, because it only returns a pointer, which I still can't somehow cast to the Rust's module data struct.

Could you please help me with this task? I'm still just learning Rust and don't understand a lot.

[bennetthardwick]

Hi @erickskrauch I'm not sure what the best way to do this is. If you have any examples in other languages that do this I can try and create an API that can help.

I haven't tested this but you might be able to create a static variable to store your shared state or channel. Kinda like how the module is stored:

rust-obs-plugins/src/module.rs

Lines 86 to 103 in 08d66c6

	static mut OBS_MODULE: Option<$t> = None;
	static mut LOAD_CONTEXT: Option<$crate::module::LoadContext> = None;
	#[allow(missing_safety_doc)]
	#[no_mangle]
	pub unsafe extern "C" fn obs_module_set_pointer(raw: *mut $crate::obs_sys::obs_module_t) {
	OBS_MODULE = Some(<$t>::new(ModuleContext::new(raw)));
	}
	#[allow(missing_safety_doc)]
	#[no_mangle]
	pub unsafe extern "C" fn obs_current_module() -> *mut $crate::obs_sys::obs_module_t {
	if let Some(module) = &OBS_MODULE {
	module.get_ctx().get_raw()
	} else {
	panic!("Could not get current module!");
	}
	}

If that doesn't work you could create a named pipe but that would probably have performance implications.

Let me know if the static variable works for you 👍🏻