etcnixos -> system

system/vr.nix

@@ -0,0 +1,49 @@
+{
+  pkgs,
+  inputs,
+  lib,
+  ...
+}:
+{
+
+  # for FO4 VR:
+  # doesn't work. it's like the wivrn stuff doesn't transfer past MO2
+  # `echo "PRESSURE_VESSEL_FILESYSTEMS_RW=$XDG_RUNTIME_DIR/wivrn/comp_ipc %command%" | sed -r "s/proton waitforexitandrun .*/proton waitforexitandrun \/media\/games\/fallout4vr_essentials_overhaul\/ModOrganizer.exe \"moshortcut:\/\/:Play Fallout Essentials\" /" | sh`
+
+  services.wivrn = {
+    enable = true;
+    openFirewall = true;
+
+    # Write information to /etc/xdg/openxr/1/active_runtime.json, VR applications
+    # will automatically read this and work with wivrn
+    defaultRuntime = true;
+
+    # Executing it through the systemd service executes WiVRn w/ CAP_SYS_NICE
+    # Resulting in no stutters!
+    autoStart = true;
+
+    # Config for WiVRn
+    config = {
+      enable = true;
+      json = {
+        # 1.0x display scaling
+        scale = 1.0;
+        # 100 Mb/s
+        bitrate = 100000000;
+        encoders = [
+          {
+            encoder = "vaapi";
+            codec = "h265";
+            # 1.0 x 1.0 scaling
+            width = 1.0;
+            height = 1.0;
+            offset_x = 0.0;
+            offset_y = 0.0;
+          }
+        ];
+
+        application = [ pkgs.wlx-overlay-s ];
+      };
+    };
+  };
+}