Add OBS studio

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

hosts/common/user/configs/gui/obs/default.nix

@@ -0,0 +1,34 @@
+{
+  user ? throw "user argument is required",
+  home ? throw "home argument is required",
+}:
+{ config, pkgs, ... }:
+{
+  boot = {
+    kernelModules = [ "v4l2loopback" ];
+    extraModulePackages = [ config.boot.kernelPackages.v4l2loopback ];
+    extraModprobeConfig = ''
+      options v4l2loopback devices=1 video_nr=1 card_label="OBS Cam" exclusive_caps=1
+    '';
+  };
+
+  environment.persistence = {
+    "/persist"."${home}/.config/obs-studio" = { };
+  };
+
+  home-manager.users.${user} = {
+    programs.obs-studio.enable = true;
+
+    xdg.configFile."obs-studio/basic/profiles/Untitled/basic.ini".source =
+      (pkgs.formats.ini { }).generate "basic.ini"
+        {
+          SimpleOutput = {
+            FilePath = "${home}/Videos";
+            VBitrate = 4000;
+            ABitrate = 320;
+            RecEncoder = "nvenc_hevc";
+            FileNameWithoutSpace = true;
+          };
+        };
+  };
+}

hosts/common/user/configs/gui/xdg/default.nix

@@ -0,0 +1,11 @@
+{
+  user ? throw "user argument is required",
+  home ? throw "home argument is required",
+}:
+{ config, pkgs, ... }:
+{
+  home-manager.users.${user}.xdg.portal = {
+    xdgOpenUsePortal = true;
+    extraPortals = with pkgs; [ xdg-desktop-portal-gtk ];
+  };
+}