add vapoursynth descale release

media-plugins/vapoursynth-descale/Manifest

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+DIST vapoursynth-descale-2.tar.gz 7535 BLAKE2B 65b98d5cb19c40d415c1b19cc807555684e9165d23240394be3acc08969ed54ac6c7304234236e6068d4c0d0d83c1cca5ee7a3a6bba318d19084dedf2232c0b4 SHA512 02cd494a6de7b1374bd7580523639e0ad41ed7c835876363a4432dd6baeeb65f64d6b8a5dcf78850ffed4fad28b0f21fe6df5ad575e5d9ec9903f643b2ab003a

media-plugins/vapoursynth-descale/vapoursynth-descale-2.ebuild

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+# Copyright 1999-2017 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+inherit toolchain-funcs
+
+DESCRIPTION="VapourSynth plugin to undo upscaling"
+HOMEPAGE="https://github.com/Frechdachs/vapoursynth-descale"
+
+if [[ ${PV} == *9999* ]]; then
+	inherit git-r3
+	EGIT_REPO_URI="https://github.com/Frechdachs/vapoursynth-descale.git"
+	KEYWORDS=""
+else
+	inherit vcs-snapshot
+	SRC_URI="https://github.com/Frechdachs/${PN}/archive/r${PV}.tar.gz -> ${PN}-${PV}.tar.gz"
+	KEYWORDS="~amd64 ~x86"
+fi
+
+LICENSE="WTFPL"
+SLOT="0"
+
+RDEPEND+="
+	media-libs/vapoursynth
+"
+DEPEND="${RDEPEND}"
+
+LIBNAME="libdescale.so"
+EXTRAFLAGS="-fPIC -shared -std=c++11"
+
+src_compile(){
+	echo "$(tc-getCXX) ${CFLAGS} ${EXTRAFLAGS} ${LDFLAGS} -o ${LIBNAME} descale.cpp"
+	$(tc-getCXX) ${CFLAGS} ${EXTRAFLAGS} ${LDFLAGS} -o ${LIBNAME} descale.cpp || die "Build failed"
+}
+
+src_install(){
+	exeinto /usr/$(get_libdir)/vapoursynth/
+	doexe ${LIBNAME}
+}