Sync to webrtc Tot

Update to latest lkgr commit

This is to include recent important changes of AEC3:


Note that there are some apm/aec config keys modified in this change.
Existing user should fix them separately.

TEST=emerge-nocturne webrtc-apm

Change-Id: Ib5517526db1a01dffa673d8ab0dc828ceca73535
Commit-Ready: ChromeOS CL Exonerator Bot <>
Tested-by: Hsinyu Chao <>
Reviewed-by: Cheng-Yi Chiang <>
Reviewed-by: Per Ã…hgren <>
223 files changed
tree: 5142688c28e6ee456fa835f6002b401c981c6e7f
  1. Makefile
  3. absl/
  4. api/
  5. audio/
  7. common_audio/
  8. common_types.h
  9. cras-config/
  10. libwebrtc_apm.pc.template
  11. modules/
  13. rtc_base/
  14. script/
  15. system_wrappers/
  16. third_party/
  17. typedefs.h
  19. webrtc_apm.h


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