Real-Time Noise Reduction (RTNR) Architecture

This directory houses the RTNR component.

Overview

Reduces steady-state or transient background noise from an input signal path in real time.

Configuration and Scripts

• Kconfig: Dictates the build behavior for the Realtek noise reduction and suppression components (COMP_RTNR). The feature depends heavily on specific, proprietary Realtek libraries (libSOF_RTK_MA_API.a, etc.). Configures stubs (COMP_RTNR_STUB) to circumvent library unavailability during testing and CI logic runs.
• CMakeLists.txt: Injects rtnr.c directly into Zephyr builds and gracefully falls back to Zephyr external libraries handling. Offers thorough llext generation and cleanly wraps stub testing modules rtnr_stub.c.
• rtnr.toml: Defines topology properties for the loadable RTNR logic (UUID binding, generic pinning setups).