Expose OpenAL-defined reverb efx

[McSinyx]

This issue is a follow-up of GH-24 (and thus GH-58).

Per private is discussion, we discovered that Effect is intended to load pre-defined effects, hence the unusual size of the parameter that the class' methods take, or at least that's true for reverb effects, which are defined in efx-presets.h by OpenAL (which is copied to alure for convenience purposes).

@9a24f0, if you want, you can take up this issue, otherwise I can do it myself. The task is simply declare the reverbs and adjust the Effect's method to take simpler input.

[9a24f0]

I'm wondering that whether Reverb and EAXReverb are different things. In Effect I did implemented EAXReverb, what should I do now?

[McSinyx]

@9a24f0: oops, sorry it's in efx-presets.h. I've just edited the original statement too.

[9a24f0]

I'm even more confused rn...

[McSinyx]

The user should be able to use, e.g. EFX_REVERB_PRESET_GENERIC as their reverb configuration. Is it clear to you now?

[9a24f0]

Not yet...
We even have reverb configuration implemented?

[McSinyx]

It's the Effect.reverb_properties thing. BTW notice the odd docstring of the other property (sorry didn't catch that during revision).

[9a24f0]

Which docstring? I've read through docstrings in Effect and don't see anything strange to me...
Also, Idk how to start, may I have an example on how to expose EFX_REVERB_PRESET_GENERIC

[McSinyx]

Which docstring? I've read through docstrings in Effect and don't see anything strange to me...

You have to be kidding me: Effect.chorus_properties

Also, Idk how to start, may I have an example on how to expose EFX_REVERB_PRESET_GENERIC

At this point, I think I need to clarify that I'm not your mentor, but your collaborator. You can't keep the mindset of awaiting me to tell you how to do something---you have all the resources in your hands, do research, experiment, try this try that, etc.

EFXEAXREVERBPROPERTIES is a struct, and the pre-defined presets are memories. All you have to do is cdef extern them like other preprocessor values, but I'm taking over this since it might takes too much time. Please focus on testing then.