tvl-depot/tools/nsfv-setup/default.nix
Vincent Ambo 8361b82d0a refactor(third_party): Consistent use of depot.third_party vs. pkgs
In preparation for the solution of b/108, we need to consistently use
`depot.third_party` for packages that are only packed in the TVL depot
and `pkgs` for things that come from nixpkgs.

This commit cleans up a huge chunk of these uses in //third_party

Change-Id: Ic382c0cdea7330a84d5f0b7d109c824ddceb94e7
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2912
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
2021-04-10 11:48:55 +00:00

28 lines
1.1 KiB
Nix

# Configures a running Pulseaudio instance with an LADSP filter that
# creates a noise-cancelling sink.
#
# This can be used to, for example, cancel noise from an incoming
# video conferencing audio stream.
#
# There are some caveats, for example this will not distinguish
# between noise from different participants and I have no idea what
# happens if the default sink goes away.
#
# If this script is run while an NSFV sink exists, the existing sink
# will first be removed.
{ depot, pkgs, ... }:
let
inherit (pkgs) ripgrep pulseaudio;
inherit (depot.third_party) nsfv;
in pkgs.writeShellScriptBin "nsfv-setup" ''
export PATH="${ripgrep}/bin:${pulseaudio}/bin:$PATH"
if pacmd list-sinks | rg librnnoise_ladspa.so >/dev/null; then
pactl unload-module module-ladspa-sink
fi
SINK=$(${pulseaudio}/bin/pacmd info | ${ripgrep}/bin/rg -r '$1' '^Default sink name: (.*)$')
echo "Setting up NSFV filtering to sink ''${SINK}"
${pulseaudio}/bin/pacmd load-module module-ladspa-sink sink_name=NSFV sink_master=''${SINK} label=noise_suppressor_mono plugin=${nsfv}/lib/ladspa/librnnoise_ladspa.so control=42 rate=48000
''