Add latest media-video/v4l2loopback

media-video/v4l2loopback/Manifest

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+DIST v4l2loopback-0.12.4.tar.gz 51306 BLAKE2B 4c39405401996ba1f08db550114459b0c22dcce71ad9f33ec9b28d443eca68d924acb5d912430c5c9f5307ccb73562979f48514c135646c8fd8a888e08558cf5 SHA512 5d5f031af80a88a4ce22cc7f78814fe7bcf206c9005900a0ffb42054946746be320b0b1ca0fc172d3165029981ecb411dcc2fc936668ca0a2d8de48ea383c34d
+EBUILD v4l2loopback-0.12.4.ebuild 1121 BLAKE2B f35335b43b1404d3bad9e91ae608f6eed54fd99cfabacdf91ecde95f16d1dc06b4d1e702925b262e9e503f29b366762ba63042aef2c02e3685aa53b746d612c3 SHA512 5614d01c3516ba0144a2a3a4e3a24693adfbb9715e5ff0c5daa074497ad8d72dca9579aa4060b84574522c9ead8c17ab71338aca9ac9c7460fc79809b58e8db9

media-video/v4l2loopback/v4l2loopback-0.12.4.ebuild

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+# Copyright 1999-2019 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+inherit linux-mod toolchain-funcs
+
+case ${PV} in
+9999)
+	inherit git-r3
+	KEYWORDS=""
+	EGIT_REPO_URI="git://github.com/umlaeute/v4l2loopback.git"
+	;;
+*)
+	KEYWORDS="~amd64 ~x86"
+	SRC_URI="https://github.com/umlaeute/${PN}/archive/v${PV}.tar.gz -> ${P}.tar.gz"
+	;;
+esac
+
+DESCRIPTION="v4l2 loopback device which output is it's own input"
+HOMEPAGE="https://github.com/umlaeute/v4l2loopback"
+
+LICENSE="GPL-2"
+SLOT="0"
+IUSE="examples"
+
+CONFIG_CHECK="VIDEO_DEV"
+MODULE_NAMES="v4l2loopback(video:)"
+BUILD_TARGETS="all"
+
+pkg_setup() {
+	linux-mod_pkg_setup
+	export KERNELRELEASE=${KV_FULL}
+}
+
+src_prepare() {
+	default
+	sed -i -e 's/gcc /$(CC) /' examples/Makefile || die
+}
+
+src_compile() {
+	linux-mod_src_compile
+	if use examples; then
+		emake CC=$(tc-getCC) -C examples
+	fi
+}
+
+src_install() {
+	linux-mod_src_install
+	dosbin utils/v4l2loopback-ctl
+	dodoc doc/kernel_debugging.txt
+	dodoc doc/docs.txt
+	if use examples; then
+		dosbin examples/yuv4mpeg_to_v4l2
+		docinto examples
+		dodoc examples/{*.sh,*.c,Makefile}
+	fi
+}