From cdc687d35b2ab4824f90a0ae2061349754adb480 Mon Sep 17 00:00:00 2001
From: Vincent Ambo <mail@tazj.in>
Date: Fri, 26 Jun 2020 04:38:26 +0100
Subject: feat(tools/nsfv-setup): Move NSFV setup script out of //users

This program can be used for noise-cancelling in arbitrary audio
streams. See CL/576 and CL/577 for more details.

This moves the script out of my users folder and to //tools, and adds
two changes:

* Existing sinks will be removed & reinitialised
* The sink is changed from stereo->mono (which seems to make little
  difference but is more reliable)
* The parameter has changed from 50 to 42 because I felt like it

Change-Id: Id9ff285fefd682ccc4d9f18e46b5fde9cd056aa7
Reviewed-on: https://cl.tvl.fyi/c/depot/+/578
Reviewed-by: glittershark <grfn@gws.fyi>
---
 tools/nsfv-setup/default.nix        | 27 +++++++++++++++++++++++++++
 users/tazjin/nsfv-setup/default.nix | 18 ------------------
 2 files changed, 27 insertions(+), 18 deletions(-)
 create mode 100644 tools/nsfv-setup/default.nix
 delete mode 100644 users/tazjin/nsfv-setup/default.nix

diff --git a/tools/nsfv-setup/default.nix b/tools/nsfv-setup/default.nix
new file mode 100644
index 0000000000..aa3567c56a
--- /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=${pkgs.nsfv}/lib/ladspa/librnnoise_ladspa.so control=42
+''
diff --git a/users/tazjin/nsfv-setup/default.nix b/users/tazjin/nsfv-setup/default.nix
deleted file mode 100644
index 65f94034da..0000000000
--- a/users/tazjin/nsfv-setup/default.nix
+++ /dev/null
@@ -1,18 +0,0 @@
-# Configures a running Pulseaudio instance with an LADSP filter that
-# creates a noise-cancelling sink.
-#
-# This can be used to, for example, cancel noise from an incoming
-# video conferencing audio stream.
-#
-# There are some caveats, for example this will not distinguish
-# between noise from different participants and I have no idea what
-# happens if the default sink goes away.
-{ pkgs, ... }:
-
-let
-  inherit (pkgs) ripgrep pulseaudio nsfv;
-in pkgs.writeShellScriptBin "nsfv-setup" ''
-  SINK=$(${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_stereo plugin=${pkgs.nsfv}/lib/ladspa/librnnoise_ladspa.so control=50
-''
-- 
cgit 1.4.1