From aae534308a46db3f52885119575bc30b21a2c70c Mon Sep 17 00:00:00 2001
From: Tom Alexander <tom@fizz.buzz>
Date: Wed, 25 Dec 2024 09:13:34 -0500
Subject: [PATCH] Add noise supression to microphone.

---
 nix/configuration/flake.lock                  | 20 +++++-----
 .../flakes/zsh-histdb/flake.lock              |  6 +--
 .../flakes/zsh-histdb/package.nix             |  1 +
 nix/configuration/network.nix                 |  1 +
 nix/configuration/roles/sound/default.nix     | 38 +++++++++++++++++++
 5 files changed, 53 insertions(+), 13 deletions(-)

diff --git a/nix/configuration/flake.lock b/nix/configuration/flake.lock
index e64af3f..ed44628 100644
--- a/nix/configuration/flake.lock
+++ b/nix/configuration/flake.lock
@@ -139,11 +139,11 @@
     },
     "impermanence": {
       "locked": {
-        "lastModified": 1734200366,
-        "narHash": "sha256-0NursoP4BUdnc+wy+Mq3icHkXu/RgP1Sjo0MJxV2+Dw=",
+        "lastModified": 1734945620,
+        "narHash": "sha256-olIfsfJK4/GFmPH8mXMmBDAkzVQ1TWJmeGT3wBGfQPY=",
         "owner": "nix-community",
         "repo": "impermanence",
-        "rev": "c6323585fa0035d780e3d8906eb1b24b65d19a48",
+        "rev": "d000479f4f41390ff7cf9204979660ad5dd16176",
         "type": "github"
       },
       "original": {
@@ -181,11 +181,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1734323986,
-        "narHash": "sha256-m/lh6hYMIWDYHCAsn81CDAiXoT3gmxXI9J987W5tZrE=",
+        "lastModified": 1734991663,
+        "narHash": "sha256-8T660guvdaOD+2/Cj970bWlQwAyZLKrrbkhYOFcY1YE=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "394571358ce82dff7411395829aa6a3aad45b907",
+        "rev": "6c90912761c43e22b6fb000025ab96dd31c971ff",
         "type": "github"
       },
       "original": {
@@ -229,11 +229,11 @@
     },
     "nixpkgs-unstable": {
       "locked": {
-        "lastModified": 1734424634,
-        "narHash": "sha256-cHar1vqHOOyC7f1+tVycPoWTfKIaqkoe1Q6TnKzuti4=",
+        "lastModified": 1734649271,
+        "narHash": "sha256-4EVBRhOjMDuGtMaofAIqzJbg4Ql7Ai0PSeuVZTHjyKQ=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "d3c42f187194c26d9f0309a8ecc469d6c878ce33",
+        "rev": "d70bd19e0a38ad4790d3913bf08fcbfc9eeca507",
         "type": "github"
       },
       "original": {
@@ -345,7 +345,7 @@
       },
       "locked": {
         "lastModified": 1,
-        "narHash": "sha256-vPz7cJzdLAWFWQQ/KSXGB+HsUfO8CnPX4AO4zjf9llo=",
+        "narHash": "sha256-Cf8NVSnjPiAi29Df1Tb1Ea6uqISWps5nx3qJl5yAbOo=",
         "path": "flakes/zsh-histdb",
         "type": "path"
       },
diff --git a/nix/configuration/flakes/zsh-histdb/flake.lock b/nix/configuration/flakes/zsh-histdb/flake.lock
index b3604a4..a904960 100644
--- a/nix/configuration/flakes/zsh-histdb/flake.lock
+++ b/nix/configuration/flakes/zsh-histdb/flake.lock
@@ -20,11 +20,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1734875076,
-        "narHash": "sha256-Pzyb+YNG5u3zP79zoi8HXYMs15Q5dfjDgwCdUI5B0nY=",
+        "lastModified": 1734991663,
+        "narHash": "sha256-8T660guvdaOD+2/Cj970bWlQwAyZLKrrbkhYOFcY1YE=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "1807c2b91223227ad5599d7067a61665c52d1295",
+        "rev": "6c90912761c43e22b6fb000025ab96dd31c971ff",
         "type": "github"
       },
       "original": {
diff --git a/nix/configuration/flakes/zsh-histdb/package.nix b/nix/configuration/flakes/zsh-histdb/package.nix
index 6a43797..d2ea553 100644
--- a/nix/configuration/flakes/zsh-histdb/package.nix
+++ b/nix/configuration/flakes/zsh-histdb/package.nix
@@ -21,6 +21,7 @@ stdenv.mkDerivation {
     sha256 = "sha256-vtG1poaRVbfb/wKPChk1WpPgDq+7udLqLfYfLqap4Vg=";
   };
   buildInputs = [ sqlite ];
+  phases = [ "installPhase" ];
   installPhase = ''
     mkdir -p $out/share/zsh/plugins/zsh-histdb
     cp -r $src/histdb-* $src/*.zsh $src/db_migrations $out/share/zsh/plugins/zsh-histdb/
diff --git a/nix/configuration/network.nix b/nix/configuration/network.nix
index 3bd4002..562e560 100644
--- a/nix/configuration/network.nix
+++ b/nix/configuration/network.nix
@@ -42,5 +42,6 @@
     iw
     iwd
     ldns # for drill
+    arp-scan # To find devices on the network
   ];
 }
diff --git a/nix/configuration/roles/sound/default.nix b/nix/configuration/roles/sound/default.nix
index f9fa9d8..88a729b 100644
--- a/nix/configuration/roles/sound/default.nix
+++ b/nix/configuration/roles/sound/default.nix
@@ -21,5 +21,43 @@
     pulse.enable = true;
     # If you want to use JACK applications, uncomment this
     #jack.enable = true;
+
+    extraLv2Packages = [ pkgs.rnnoise-plugin ];
+    configPackages = [
+      (pkgs.writeTextDir "share/pipewire/pipewire.conf.d/20-rnnoise.conf" ''
+        context.modules = [
+        {   name = libpipewire-module-filter-chain
+            args = {
+                node.description = "Noise Canceling source"
+                media.name = "Noise Canceling source"
+                filter.graph = {
+                    nodes = [
+                        {
+                            type = lv2
+                            name = rnnoise
+                            plugin = "https://github.com/werman/noise-suppression-for-voice#stereo"
+                            label = noise_suppressor_stereo
+                            control = {
+                            }
+                        }
+                    ]
+                }
+                capture.props = {
+                    node.name =  "capture.rnnoise_source"
+                    node.passive = true
+                    audio.rate = 48000
+                    # Optionally specify a specific input: (ID from `pactl list`)
+                    # target.object = "alsa_input.usb-Shure_Incorporated_Shure_Digital-00.analog-stereo"
+                }
+                playback.props = {
+                    node.name =  "rnnoise_source"
+                    media.class = Audio/Source
+                    audio.rate = 48000
+                }
+            }
+        }
+        ]
+      '')
+    ];
   };
 }