# Copyright 1999-2005 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: $

inherit eutils

DESCRIPTION="The video4linux loopback device is a device driver which generates video pipes"
HOMEPAGE="http://www.lavrsen.dk/twiki/bin/view/Motion/VideoFourLinuxLoopbackDevice"
SRC_URI="http://www.lavrsen.dk/twiki/pub/Motion/VideoFourLinuxLoopbackDevice/${P}.tar.gz"
LICENSE="GPL-2"
SLOT="0"
KEYWORDS="~x86"
RESTRICT="nomirror"
IUSE="example"
DEPEND=""
RDEPEND=""

KERNEL_VER=`uname -r`
INSTALL_DIR="lib/modules/${KERNEL_VER}/misc"

src_unpack() {
	unpack ${A}

	epatch ${FILESDIR}/${PN}_version.patch

	if use example; then
		epatch ${FILESDIR}/${PN}_example.patch
	fi
}

src_compile() {
	if [[ ! -e /usr/src/linux-${KERNEL_VER}/arch/x86 ]]; then
		ewarn "Please make symlink:"
		ewarn "# ln -s /usr/src/linux/arch/i386 /usr/src/linux/arch/x86"
		die "Can not compike ${PN} module!"
	fi

	emake || die "Can not compile ${PN} module!"

	if use example; then
		cd ${S}/example
		mv resize.c vresize.c
		emake || die "Can not compile examples!"
	fi
}

src_install() {
	dodoc COPYING README

	dodir ${INSTALL_DIR}
	cp ${S}/vloopback.ko ${D}/${INSTALL_DIR}

	if use example; then
		cd ${S}/example
		dobin vresize
		dobin invert
		dobin dummy
	fi
}


pkg_postinst() {
	depmod -a

	ewarn "=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-="
	einfo "Using:"
	einfo "# modprobe vloopback dev_offset=1"
	einfo "# vresize /dev/video0 /dev/video1 320x240 176x144"
	ewarn "=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-="
}