From 1ab7d2b8506639e18b44038e4b79702dcdb7150f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?PedroHLC=20=E2=98=AD?= <root@pedrohlc.com>
Date: Thu, 26 Jan 2023 17:14:28 -0300
Subject: [PATCH] obs-studio-plugins.obs-vaapi: init at 0.1.0

---
 .../video/obs-studio/plugins/default.nix      |  2 +
 .../obs-studio/plugins/obs-vaapi/default.nix  | 49 +++++++++++++++++++
 .../applications/video/obs-studio/wrapper.nix |  2 +-
 3 files changed, 52 insertions(+), 1 deletion(-)
 create mode 100644 pkgs/applications/video/obs-studio/plugins/obs-vaapi/default.nix

diff --git a/pkgs/applications/video/obs-studio/plugins/default.nix b/pkgs/applications/video/obs-studio/plugins/default.nix
index ad37c503c0ab..eb57866d50cb 100644
--- a/pkgs/applications/video/obs-studio/plugins/default.nix
+++ b/pkgs/applications/video/obs-studio/plugins/default.nix
@@ -30,6 +30,8 @@
 
   obs-source-record = callPackage ./obs-source-record.nix { };
 
+  obs-vaapi = callPackage ./obs-vaapi { };
+
   obs-vkcapture = callPackage ./obs-vkcapture.nix {
     obs-vkcapture32 = pkgsi686Linux.obs-studio-plugins.obs-vkcapture;
   };
diff --git a/pkgs/applications/video/obs-studio/plugins/obs-vaapi/default.nix b/pkgs/applications/video/obs-studio/plugins/obs-vaapi/default.nix
new file mode 100644
index 000000000000..7a8e19325090
--- /dev/null
+++ b/pkgs/applications/video/obs-studio/plugins/obs-vaapi/default.nix
@@ -0,0 +1,49 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+, gst_all_1
+, pciutils
+, pkg-config
+, meson
+, ninja
+, obs-studio
+}:
+
+stdenv.mkDerivation rec {
+  pname = "obs-vaapi";
+  version = "0.1.0";
+
+  src = fetchFromGitHub {
+    owner = "fzwoch";
+    repo = pname;
+    rev = version;
+    hash = "sha256-qA4xVVShkp40QHp2HmmRzVxQaBwskRpUNEULKetVMu8=";
+  };
+
+  nativeBuildInputs = [ pkg-config meson ninja ];
+  buildInputs = with gst_all_1; [ gstreamer gst-plugins-base obs-studio pciutils ];
+
+  # - We need "getLib" instead of default derivation, otherwise it brings gstreamer-bin;
+  # - without gst-plugins-base it won't even show proper errors in logs;
+  # - Without gst-plugins-bad it won't find element "vapostproc";
+  # - gst-vaapi adds "VA-API" to "Encoder type";
+  # Tip: "could not link appsrc to videoconvert1" can mean a lot of things, enable GST_DEBUG=2 for help.
+  passthru.obsWrapperArguments =
+    let
+      gstreamerHook = package: "--prefix GST_PLUGIN_SYSTEM_PATH_1_0 : ${lib.getLib package}/lib/gstreamer-1.0";
+    in
+    with gst_all_1; builtins.map gstreamerHook [
+      gstreamer
+      gst-plugins-base
+      gst-plugins-bad
+      gst-vaapi
+    ];
+
+  meta = with lib; {
+    description = "OBS Studio VAAPI support via GStreamer";
+    homepage = "https://github.com/fzwoch/obs-vaapi";
+    maintainers = with maintainers; [ ahuzik pedrohlc ];
+    license = licenses.gpl2Plus;
+    platforms = [ "x86_64-linux" "i686-linux" ];
+  };
+}
diff --git a/pkgs/applications/video/obs-studio/wrapper.nix b/pkgs/applications/video/obs-studio/wrapper.nix
index 5303991f1fb9..62bc80d26df3 100644
--- a/pkgs/applications/video/obs-studio/wrapper.nix
+++ b/pkgs/applications/video/obs-studio/wrapper.nix
@@ -24,7 +24,7 @@ symlinkJoin {
           "$out/bin/obs"
           ''--set OBS_PLUGINS_PATH "${pluginsJoined}/lib/obs-plugins"''
           ''--set OBS_PLUGINS_DATA_PATH "${pluginsJoined}/share/obs/obs-plugins"''
-        ] ++ pluginArguments;
+        ] ++ lists.unique pluginArguments;
     in ''
     ${concatStringsSep " " wrapCommandLine}