From 635edfc0ce1ae0504f2877f846211a4fdfa6d327 Mon Sep 17 00:00:00 2001
From: Tim Keller <tjk@tjkeller.xyz>
Date: Fri, 11 Jul 2025 11:26:40 -0500
Subject: blackmagic desktop vid custom derivation and decklink support

---
 modules/hosts/optiplex/configuration.nix |  4 ++++
 modules/root/decklink.nix                | 24 ++++++++++++++++++++++++
 modules/root/default.nix                 |  2 ++
 modules/root/software/default.nix        |  1 +
 modules/root/software/desktop.nix        |  3 +++
 modules/root/software/utilities.nix      |  1 +
 6 files changed, 35 insertions(+)
 create mode 100644 modules/root/decklink.nix

(limited to 'modules')

diff --git a/modules/hosts/optiplex/configuration.nix b/modules/hosts/optiplex/configuration.nix
index 16ba475..625d37a 100644
--- a/modules/hosts/optiplex/configuration.nix
+++ b/modules/hosts/optiplex/configuration.nix
@@ -13,6 +13,7 @@
 		graphics.enable = true;
 		office.enable = true;
 		utilities.enable = true;
+		video.enable = true;
 	};
 	software.development = {
 		docker.enable = true;
@@ -31,6 +32,9 @@
 	# Disable wifi
 	wifi.enable = false;
 
+	# Enable decklink
+	decklink.enable = true;
+
 	# Use nvidia driver
 	services.xserver.videoDrivers = [ "nvidia" ];
 	hardware.nvidia = {
diff --git a/modules/root/decklink.nix b/modules/root/decklink.nix
new file mode 100644
index 0000000..6fd6395
--- /dev/null
+++ b/modules/root/decklink.nix
@@ -0,0 +1,24 @@
+{ lib, pkgs, ... }: {
+	options = {
+		decklink.enable = lib.mkEnableOption "enables decklink support";
+	};
+
+	config = {
+		# Kernel modules
+		hardware.decklink.enable = true;
+
+		# DesktopVideoHelper
+		environment.systemPackages = with pkgs; [ pkgs.blackmagic-desktop-video-gui ];
+
+		# Enable decklinkSupport flag globally for all packages that support it (e.g. obs)
+		nixpkgs.overlays = [
+			(final: prev: { decklinkSupport = true; })
+			#(import ./software/derivations/blackmagic-desktop-video-gui/default.nix)
+			(final: prev: {
+				blackmagic-desktop-video-gui = (pkgs.callPackage ./software/derivations/blackmagic-desktop-video-gui/generic.nix {}).override({
+					desktopVideoFull = true;
+				});
+			})
+		];
+	};
+}
diff --git a/modules/root/default.nix b/modules/root/default.nix
index e24e4b0..1006d7d 100644
--- a/modules/root/default.nix
+++ b/modules/root/default.nix
@@ -4,6 +4,7 @@
 		./autologin.nix
 		./bluetooth.nix
 		./bootloader.nix
+		./decklink.nix
 		./doas.nix
 		./fonts.nix
 		./home-manager.nix
@@ -28,6 +29,7 @@
 	autologin.enable       = lib.mkDefault true;
 	avahi.enable           = lib.mkDefault true;
 	bluetooth.enable       = lib.mkDefault false;
+	decklink.enable        = lib.mkDefault false;
 	doas.enable            = lib.mkDefault true;
 	fonts.enable           = lib.mkDefault true;
 	nas = {
diff --git a/modules/root/software/default.nix b/modules/root/software/default.nix
index 5f6494d..7696fd6 100644
--- a/modules/root/software/default.nix
+++ b/modules/root/software/default.nix
@@ -20,6 +20,7 @@
 		graphics.enable    = lib.mkDefault false;
 		office.enable      = lib.mkDefault false;
 		utilities.enable   = lib.mkDefault false;
+		video.enable       = lib.mkDefault false;
 	};
 
 	software.development = {
diff --git a/modules/root/software/desktop.nix b/modules/root/software/desktop.nix
index b8cd1e7..ddbf784 100644
--- a/modules/root/software/desktop.nix
+++ b/modules/root/software/desktop.nix
@@ -16,6 +16,7 @@
 			graphics.enable = lib.mkEnableOption "enables graphic design apps";
 			office.enable = lib.mkEnableOption "enables office apps";
 			utilities.enable = lib.mkEnableOption "enables miscellaneous utility apps";
+			video.enable = lib.mkEnableOption "enables video apps";
 		};
 	};
 
@@ -63,6 +64,8 @@
 			qbittorrent
 			qdirstat
 			remmina
+		] ++ pkgs.lib.optionals config.software.desktop.video.enable [
+			obs-studio
 		];
 
 		programs.localsend.enable = config.software.desktop.utilities.enable;  # Installs & opens firewall
diff --git a/modules/root/software/utilities.nix b/modules/root/software/utilities.nix
index 79285a1..bbe2539 100644
--- a/modules/root/software/utilities.nix
+++ b/modules/root/software/utilities.nix
@@ -15,6 +15,7 @@
 		openssl
 		p7zip
 		pavolctld
+		pciutils
 		powertop
 		pv
 		rsync
-- 
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