[Feature Request] Allow native level sampling of audio buffer for realtime amplitude

[fogg4444]

What is the need and use case of this feature?
I'm attempting to create an audio visualizer which renders audio amplitude in realtime during playback.

Describe the ideal solution
During playback, RNTP will allow access to the native audio buffer by way of a query function, something like getAudioAmplitude(). This would allow custom native code an easy hook to querying audio amplitude at a desired framerate, without excessively complicating RNTP. A simple utility function of this variety would allow all manner of live visualization functionality to be integrated with RNTP.

Describe alternatives you've considered
No alternatives that I'm aware of.

Additional context
Add any other context or screenshots about the feature request here.

How I can Help
I'm interested in implementing the feature on iOS and Android. I have experience with native level development in React Native context.

[jspizziri]

@fogg4444 this seems like a great feature to me! I would say if you're interested in doing the implementation we'd be interested in adding it to the library.

@dcvz would need to agree since he has final say on all such decisions.

[dcvz]

This would be a nice addition. I've previously thought about how to best achieve this and other things like EQ.
If you're interested in championing this effort, we're happy to provide advice where we can

[jspizziri]

@fogg4444 it looks like you're a go for implementation. Are you planning on working on this in the near future? If not I'm going to close it and put it in the feature backlog.

[bradfloodx]

@jspizziri Can you please add to feature backlog? (I don't have perms in that project I think)

[smblee]

@jspizziri looks like this issue has been resolved 3 years ago – was this actually implemented?

[jspizziri]

No, it was not implemented.

[smblee]

@jspizziri if you could give guidance, i would love to give it a shot! I should probably mess with the https://github.com/doublesymmetry/SwiftAudioEx for iOS so i could expose and tap into AVAudioEngine's mixer/output nodes?

Looks like there is a PR that hasn't been merged doublesymmetry/SwiftAudioEx#80