Add sofalizer element
This update introduces the sofalizer element, and relocates hrtf filters rendering to a separate plugin. Two processing backends are now available:
- Processing via the hrtf crate, utilizing the ircam file format as outlined in the hrtf crate documentation.
- Processing through sofar, which accepts SOFA files and leverages the libmysofa library.
Depends on: gstreamer-rs!1473 (merged)
Edited by Tomasz Andrzejak