boreal: switch to pipewire

hosts/boreal/default.nix

@@ -74,6 +74,8 @@ in
       ];
     };
 
+    pipewire.enable = true;
+
     wireguard = {
       enable = false;
       iface = "wg";
@@ -112,13 +114,6 @@ in
   # TODO: remove when https://nixpk.gs/pr-tracker.html?pr=124237 reaches unstable
   nix.sandboxPaths = [ "/bin/sh=${pkgs.bash}/bin/sh" ];
 
-  sound.enable = true;
-  hardware.pulseaudio = {
-    enable = true;
-    extraModules = [ pkgs.pulseaudio-modules-bt ];
-    package = pkgs.pulseaudioFull;
-  };
-
   hardware.bluetooth = {
     enable = true;
     powerOnBoot = true;

services/default.nix

@@ -14,6 +14,7 @@
     ./monitoring.nix
     ./nextcloud.nix
     ./nginx.nix
+    ./pipewire.nix
     ./postgresql-backup.nix
     ./postgresql.nix
     ./tgv.nix

services/pipewire.nix

@@ -0,0 +1,68 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.my.services.pipewire;
+  my = config.my;
+in
+{
+  options.my.services.pipewire = {
+    enable = lib.mkEnableOption "Pipewire sound backend";
+  };
+
+  config = mkIf cfg.enable {
+    # from NixOS wiki, causes conflicts with pipewire
+    sound.enable = false;
+    # recommended for pipewire as well
+    security.rtkit.enable = true;
+    services.pipewire = {
+      enable = true;
+
+      alsa = {
+        enable = true;
+        support32Bit = true;
+      };
+      pulse.enable = true;
+      jack.enable = true;
+
+      media-session = {
+        enable = true;
+        config.bluez-monitor.rules = [
+          {
+            # Matches all cards
+            matches = [{ "device.name" = "~bluez_card.*"; }];
+            actions = {
+              "update-props" = {
+                "bluez5.reconnect-profiles" = [
+                  "a2dp_sink"
+                  "hfp_hf"
+                  "hsp_hs"
+                ];
+                # mSBC provides better audio + microphone
+                "bluez5.msbc-support" = true;
+                # SBC XQ provides better audio
+                "bluez5.sbc-xq-support" = true;
+              };
+            };
+          }
+          {
+            matches = [
+              # Matches all sources
+              {
+                "node.name" = "~bluez_input.*";
+              }
+              # Matches all outputs
+              {
+                "node.name" = "~bluez_output.*";
+              }
+            ];
+            actions = {
+              "node.pause-on-idle" = false;
+            };
+          }
+        ];
+      };
+    };
+  };
+}