Clone this repo:
  1. ede78de Expose aec3 config by Hsin-Yu Chao · 7 weeks ago master release-R69-10895.B stabilize-10866.B stabilize-nocturne.10828.B
  2. a724570 Sync to upstream webrtc checkout by Hsin-Yu Chao · 7 weeks ago
  3. c547aff Add by Hsin-Yu Chao · 3 months ago factory-nami-10715.B firmware-nami-10775.B release-R68-10718.B stabilize-10682.B stabilize-10718.71.B stabilize-atlas.10736.B stabilize-atlas.10819.B stabilize-nocturne.10736.B stabilize-nocturne.10819.B
  4. 8667325 Add pkg-config files and makefiles by Hsin-Yu Chao · 3 months ago
  5. b6f63cd Add C wrapper to access APM functions by Hsin-Yu Chao · 3 months ago


APM is the audio processing module of WebRTC project in charge of effects like echo cancellation, noise suppression, etc. The purpose of this project is to build a standalone library for Chrome OS system side audio processing.

Files content

  • scripts to copy over folders and files from upstream WebRTC project for APM and its dependencies.
  • Copied files from upstream WebRTC project. For example: common_audio, modules, rtc_base and system_wrappers.
  • C wrappers to access APM functions.
  • common-mk based makefiles to build shared library


To update this package to latest upstream WebRC:

  • Run ./script/ path/to/webrtc-checkout/src .
  • emerge webrtc-apm to see if anything breaks.
  • If emerge success, then we're good.
  • Otherwise look into the emerge failure, and then possibly:
    • Update to copy more files if upstream directory structure changes.
    • Update makefiles if upstream build files has changed.
    • Update webrtc-apm ebuild file if dependencies changed.
  • Create a new commit