about summary refs log tree commit diff
path: root/tools/nsfv-setup/default.nix
diff options
context:
space:
mode:
Diffstat (limited to 'tools/nsfv-setup/default.nix')
-rw-r--r--tools/nsfv-setup/default.nix27
1 files changed, 27 insertions, 0 deletions
diff --git a/tools/nsfv-setup/default.nix b/tools/nsfv-setup/default.nix
new file mode 100644
index 000000000000..aa3567c56ae1
--- /dev/null
+++ b/tools/nsfv-setup/default.nix
@@ -0,0 +1,27 @@
+# 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.
+{ pkgs, ... }:
+
+let
+  inherit (pkgs) ripgrep pulseaudio 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=${pkgs.nsfv}/lib/ladspa/librnnoise_ladspa.so control=42
+''