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{ stdenv
, lib
, fetchpatch
, blackmagic-desktop-video
, kernel
}:
stdenv.mkDerivation rec {
pname = "decklink";
# the download is a horrible curl mess. we reuse it between the kernel module
# and desktop service, since the version of the two have to match anyways.
# See pkgs/tools/video/blackmagic-desktop-video/default.nix for more.
inherit (blackmagic-desktop-video) src version;
KERNELDIR = "${kernel.dev}/lib/modules/${kernel.modDirVersion}/build";
INSTALL_MOD_PATH = placeholder "out";
nativeBuildInputs = kernel.moduleBuildDependencies;
patches = lib.optionals (lib.versionAtLeast kernel.version "6.8") [
(fetchpatch {
name = "decklink-addMutex.patch";
url = "https://aur.archlinux.org/cgit/aur.git/plain/01-addMutex.patch?h=decklink&id=132ce45a76e230cbfec4a3daac237ffe9b8a377a";
sha256 = "sha256-YLIjO3wMrMoEZwMX5Fs9W4uRu9Xo8klzsjfhxS2wRfQ=";
})
(fetchpatch {
name = "decklink-changeMaxOrder.patch";
url = "https://aur.archlinux.org/cgit/aur.git/plain/02-changeMaxOrder.patch?h=decklink&id=132ce45a76e230cbfec4a3daac237ffe9b8a377a";
sha256 = "sha256-/erUVYjpTuyaQaCSzSxwKgNocxijc1uNaUjnrJEMa6g=";
})
];
postUnpack = let
arch = stdenv.hostPlatform.uname.processor;
in ''
tar xf Blackmagic_Desktop_Video_Linux_${lib.head (lib.splitString "a" version)}/other/${arch}/desktopvideo-${version}-${arch}.tar.gz
moduleRoot=$NIX_BUILD_TOP/desktopvideo-${version}-${stdenv.hostPlatform.uname.processor}/usr/src
sourceRoot=$moduleRoot
'';
buildPhase = ''
runHook preBuild
make -C $moduleRoot/blackmagic-${version} -j$NIX_BUILD_CORES
make -C $moduleRoot/blackmagic-io-${version} -j$NIX_BUILD_CORES
runHook postBuild
'';
installPhase = ''
runHook preInstall
make -C $KERNELDIR M=$moduleRoot/blackmagic-${version} modules_install
make -C $KERNELDIR M=$moduleRoot/blackmagic-io-${version} modules_install
runHook postInstall
'';
meta = with lib; {
homepage = "https://www.blackmagicdesign.com/support/family/capture-and-playback";
maintainers = [ maintainers.hexchen ];
license = licenses.unfree;
description = "Kernel module for the Blackmagic Design Decklink cards";
sourceProvenance = with lib.sourceTypes; [ binaryFirmware ];
platforms = platforms.linux;
};
}
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