sound: add a new module

This is the start of yet another refactoring of the configuration.

Sound configuration is moving to a module, and we enable it as needed at
the host level. It takes care of configuring pipewire and install the
packages needed too.

This module is applied to the laptop and the desktop.

3 files changed, 41 insertions, 0 deletions

diff --git a/modules/default.nix b/modules/default.nix
new file mode 100644
index 0000000..5ec7ef8
--- /dev/null
+++ b/modules/default.nix
@@ -0,0 +1 @@
+{ ... }: { imports = [ ./hardware ]; }
diff --git a/modules/hardware/default.nix b/modules/hardware/default.nix
new file mode 100644
index 0000000..79b062e
--- /dev/null
+++ b/modules/hardware/default.nix
@@ -0,0 +1,5 @@
+{ ... }:
+
+{
+  imports = [ ./sound ];
+}
diff --git a/modules/hardware/sound/default.nix b/modules/hardware/sound/default.nix
new file mode 100644
index 0000000..95e5ebc
--- /dev/null
+++ b/modules/hardware/sound/default.nix
@@ -0,0 +1,35 @@
+{ config, lib, pkgs, ... }:
+let cfg = config.my.hardware.sound;
+in {
+  options.my.hardware.sound = with lib; {
+    pipewire = { enable = mkEnableOption "pipewire configuration"; };
+  };
+
+  config = lib.mkIf cfg.pipewire.enable {
+    sound.enable = true;
+
+    # RealtimeKit is recommended
+    security.rtkit.enable = true;
+
+    environment.systemPackages = with pkgs; [
+      # We install it to get access to pactl. It isn't enabled or run as a service.
+      pulseaudio
+      pavucontrol
+    ];
+
+    services.pipewire = {
+      enable = true;
+
+      alsa = {
+        enable = true;
+        support32Bit = true;
+      };
+
+      pulse = { enable = true; };
+
+      jack = { enable = true; };
+    };
+
+    hardware.pulseaudio.enable = false;
+  };
+}