Uprev to branch-heads/74

To commit
'Merge to M74: Revert "Remove rtc::TimeMillis() call from ALR detector."'


Existing aec.ini config files should be modified base on the parameters
change as below:


AEC_DELAY_DELAY_HEADROOM_SAMPLES "delay:delay_headroom_samples"
AEC_DELAY_HYSTERESIS_LIMIT_BLOCKS "delay:hysteresis_limit_blocks"
AEC_EP_STRENGTH_DEFAULT_GAIN "ep_strength:default_gain"


AEC_BUFFERING_USE_NEW_RENDER_BUFFERING "buffering:use_new_render_buffering"
AEC_DELAY_API_CALL_JITTER_BLOCKS "delay:api_call_jitter_blocks"
AEC_DELAY_MIN_ECHO_PATH_DELAY_BLOCKS "delay:min_echo_path_delay_blocks"
AEC_DELAY_DELAY_HEADROOM_BLOCKS "delay:delay_headroom_blocks"
AEC_DELAY_HYSTERESIS_LIMIT_1_BLOCKS "delay:hysteresis_limit_1_blocks"
AEC_DELAY_HYSTERESIS_LIMIT_2_BLOCKS "delay:hysteresis_limit_2_blocks"
AEC_DELAY_SKEW_HYSTERESIS_BLOCKS "delay:skew_hysteresis_blocks"
AEC_EP_STRENGTH_LF "ep_strength:lf"
AEC_EP_STRENGTH_MF "ep_strength:mf"
AEC_EP_STRENGTH_HF "ep_strength:hf"
AEC_ECHO_REMOVAL_CTL_INITIAL_GAIN "echo_removal_control:initial_gain"
AEC_ECHO_REMOVAL_CTL_FIRST_NON_ZERO_GAIN "echo_removal_control:first_non_zero_gain"
AEC_ECHO_REMOVAL_CTL_NON_ZERO_GAIN_BLOCKS "echo_removal_control:non_zero_gain_blocks"
AEC_ECHO_REMOVAL_CTL_FULL_GAIN_BLOCKS "echo_removal_control:full_gain_blocks"

TEST=emerge-atlas webrtc-apm

Change-Id: Ifb701bfc14844c32b8d7561c4b48fd61be3f7157
Reviewed-on: https://chromium-review.googlesource.com/1545814
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Hsinyu Chao <hychao@chromium.org>
Reviewed-by: Hsinyu Chao <hychao@chromium.org>
Reviewed-by: Per Ã…hgren <peah@chromium.org>
2010 files changed
tree: fb62dbb91ebf1c538c644f920460b6b65fe4e2b0
  1. absl/
  2. api/
  3. audio/
  4. common_audio/
  5. cras-config/
  6. modules/
  7. rtc_base/
  8. script/
  9. system_wrappers/
  10. third_party/
  11. common.mk
  12. common_types.h
  13. libwebrtc_apm.pc.template
  14. Makefile
  15. pc_utils.mk
  16. README.md
  17. typedefs.h
  18. webrtc_apm.cc
  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.
  • webrtc_apm.cc/h C wrappers to access APM functions.
  • common-mk based makefiles to build shared library libwebrtc_apm.so


To update this package to latest upstream WebRC:

  • Run ./script/sync-apm.sh 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 sync-apm.sh 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