Missing function AttachAudioStreamProcessor and DetachAudioStreamProcessor.

[Hultan]

I can't complete the examples/audio/stream_effects, the last example that is missing in the audio section at raylib.com, because the functions AttachAudioStreamProcessor and DetachAudioStreamProcessor are missing. If anyone could add them, I could (probably) finish off the examples/audio section.

[JupiterRider]

Right. They are missing in the CGO Version. They have to be added in raylib/raudio.go

[JupiterRider]

We also should review DetachAudioStreamProcessor and DetachAudioMixedProcessor in the purego version, which can't work, because it always detaches a new callback.

[JupiterRider]

@gen2brain @agrigoryan What do you think about using purego.NewCallback in the cgo version as well?
With that, the code would be much cleaner, because we don't need wrapper functions anymore.

Otherwise the code will be much more muddled: c2c8150

But purego would break Support for OpenBSD and 32-bit Platforms. So maybe it is not a good idea.

[gen2brain]

@JupiterRider If possible that would be nice. I remember I had an issue though, there is a limit of callbacks one can have if you fire NewCallback every time, I had to do something like this https://github.com/gen2brain/webp/blob/main/webp_dynamic.go#L220 and https://github.com/gen2brain/webp/blob/main/webp_dynamic.go#L278.

Though, I don't like breaking support for 32-bit platforms. Luckily there are not many callbacks in raylib.

[JupiterRider]

@gen2brain Do you think SetAudioStreamCallback even works? (added by you in #279)
I ask because you can only set one global callback and not one callback per AudioStream.

[gen2brain]

@JupiterRider I don't think I ever tested it.

[Rockenstien]

How can I use AttachAudioStreamProcessor ?

[JupiterRider]

@Rockenstien for now manually (by writing your functions in C) or you use the purego version.

@gen2brain do you have any Ideas, how to solve this issue?

[gen2brain]

@JupiterRider Sorry, I have no idea and currently have no time to work on that.

[gen2brain]

@JupiterRider It is probably something like one C-exported Go function that would always be called; that function can call all Go-added functions to some map.