obs-v4l2sink: add 32-bit support

The rev was downgraded to the latest released version (0.1.0) because the
the changes on master are mostly related to localization and README
stuff. The only code-related change is insignificant.

2 files changed, 28 insertions, 49 deletions

diff --git a/pkgs/applications/video/obs-studio/0001-find-ObsPluginHelpers.cmake-in-the-obs-src.patch b/pkgs/applications/video/obs-studio/0001-find-ObsPluginHelpers.cmake-in-the-obs-src.patch
deleted file mode 100644
index b642fbc3ada..00000000000
--- a/pkgs/applications/video/obs-studio/0001-find-ObsPluginHelpers.cmake-in-the-obs-src.patch
+++ /dev/null
@@ -1,25 +0,0 @@
-From 5798a2691467604e89fd9fb1cd5289ebd1b1d7b8 Mon Sep 17 00:00:00 2001
-From: Graham Christensen <graham@grahamc.com>
-Date: Fri, 20 Mar 2020 22:32:02 -0400
-Subject: [PATCH] find ObsPluginHelpers.cmake in the obs src
-
----
- external/FindLibObs.cmake | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-diff --git a/external/FindLibObs.cmake b/external/FindLibObs.cmake
-index ab0a3de..53a46b8 100644
---- a/external/FindLibObs.cmake
-+++ b/external/FindLibObs.cmake
-@@ -95,7 +95,7 @@ if(LIBOBS_FOUND)
- 
- 	set(LIBOBS_INCLUDE_DIRS ${LIBOBS_INCLUDE_DIR} ${W32_PTHREADS_INCLUDE_DIR})
- 	set(LIBOBS_LIBRARIES ${LIBOBS_LIB} ${W32_PTHREADS_LIB})
--	include(${LIBOBS_INCLUDE_DIR}/../cmake/external/ObsPluginHelpers.cmake)
-+	include(${OBS_SRC}/cmake/external/ObsPluginHelpers.cmake)
- 
- 	# allows external plugins to easily use/share common dependencies that are often included with libobs (such as FFmpeg)
- 	if(NOT DEFINED INCLUDED_LIBOBS_CMAKE_MODULES)
--- 
-2.25.0
-
diff --git a/pkgs/applications/video/obs-studio/v4l2sink.nix b/pkgs/applications/video/obs-studio/v4l2sink.nix
index 1a1a48f11ed..515cc001ee9 100644
--- a/pkgs/applications/video/obs-studio/v4l2sink.nix
+++ b/pkgs/applications/video/obs-studio/v4l2sink.nix
@@ -1,42 +1,46 @@
-{ stdenv, fetchFromGitHub
-, cmake, pkgconfig, wrapQtAppsHook
-, obs-studio }:
+{ lib
+, stdenv
+, fetchFromGitHub
+, cmake
+, qtbase
+, obs-studio
+}:
 
-stdenv.mkDerivation {
-  pname = "obs-v4l2sink-unstable";
-  version = "20181012";
+stdenv.mkDerivation rec {
+  pname = "obs-v4l2sink";
+  version = "0.1.0";
 
   src = fetchFromGitHub {
     owner = "CatxFish";
     repo = "obs-v4l2sink";
-    rev = "1ec3c8ada0e1040d867ce567f177be55cd278378";
-    sha256 = "03ah91cm1qz26k90mfx51l0d598i9bcmw39lkikjs1msm4c9dfxx";
+    rev = version;
+    sha256 = "0l4lavaywih5lzwgxcbnvdrxhpvkrmh56li06s3aryikngxwsk3z";
   };
 
-  nativeBuildInputs = [ cmake pkgconfig wrapQtAppsHook ];
-  buildInputs = [ obs-studio ];
+  nativeBuildInputs = [ cmake ];
+  buildInputs = [ qtbase obs-studio ];
 
-  patches = [
-    ./0001-find-ObsPluginHelpers.cmake-in-the-obs-src.patch
+  cmakeFlags = with lib; [
+    "-DLIBOBS_INCLUDE_DIR=${obs-studio.src}/libobs"
   ];
 
-  cmakeFlags = [
-    "-DLIBOBS_INCLUDE_DIR=${obs-studio}/include/obs"
-    "-DLIBOBS_LIBRARIES=${obs-studio}/lib"
-    "-DCMAKE_CXX_FLAGS=-I${obs-studio.src}/UI/obs-frontend-api"
-    "-DOBS_SRC=${obs-studio.src}"
-  ];
-
-  installPhase = ''
-    mkdir -p $out/share/obs/obs-plugins/v4l2sink/bin/64bit
-    cp ./v4l2sink.so $out/share/obs/obs-plugins/v4l2sink/bin/64bit/
+  # obs-studio expects the shared object to be located in bin/32bit or bin/64bit
+  # https://github.com/obsproject/obs-studio/blob/d60c736cb0ec0491013293c8a483d3a6573165cb/libobs/obs-nix.c#L48
+  postInstall = let
+    pluginPath = {
+      i686-linux = "bin/32bit";
+      x86_64-linux = "bin/64bit";
+    }.${stdenv.targetPlatform.system} or (throw "Unsupported system: ${stdenv.targetPlatform.system}");
+  in ''
+    mkdir -p $out/share/obs/obs-plugins/v4l2sink/${pluginPath}
+    ln -s $out/lib/obs-plugins/v4l2sink.so $out/share/obs/obs-plugins/v4l2sink/${pluginPath}
   '';
 
-  meta = with stdenv.lib; {
+  meta = with lib; {
     description = "obs studio output plugin for Video4Linux2 device";
     homepage = "https://github.com/CatxFish/obs-v4l2sink";
     maintainers = with maintainers; [ colemickens peelz ];
     license = licenses.gpl2;
-    platforms = [ "x86_64-linux" ];
+    platforms = [ "x86_64-linux" "i686-linux" ];
   };
 }