Implement HRTF support

[jdm]

https://webaudio.github.io/web-audio-api/#Spatialization-hrtf-panning

media/audio/panner_node.rs

Line 308 in 4250116

unimplemented!()

It may be possible to reuse code from some existing rust implementations of HRTF:

https://github.com/mrDIMAS/rg3d-sound/blob/master/src/hrtf.rs

We may end up using one of the binaries from https://github.com/mrDIMAS/hrir_sphere_builder/tree/master/hrtf_base/IRCAM as the database for the underlying impulse/elevation data.

[jdm]

Another possibly: https://github.com/mbillingr/ambisonic/blob/42f130d7f18a3e071e67b061f5d1ba2fc304f236/src/renderer.rs#L174-L275

[jdm]

There is reference code in Firefox; see all of the files named HRTF* in https://searchfox.org/mozilla-central/source/dom/media/webaudio/blink.

[coryagoodwin]

Me and my team will be taking on this issue with assistance from @jdm

[coryagoodwin]

We will no longer be taking this issue due to time constraints for our project. If anyone else would like to work on implementing this, you are free to.

[jdm]

https://github.com/mrDIMAS/hrtf
https://crates.io/crates/hrtf