# Copyright 1999-2021 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI="7"

MY_PV="${PV/_pre*}"
MY_P="${PN}-${MY_PV}"

inherit bash-completion-r1 gnome2-utils meson-multilib optfeature systemd tmpfiles udev

DESCRIPTION="A networked sound server with an advanced plugin system"
HOMEPAGE="https://www.freedesktop.org/wiki/Software/PulseAudio/"

if [[ ${PV} = 9999 ]]; then
	inherit git-r3
	EGIT_BRANCH="master"
	EGIT_REPO_URI="https://gitlab.freedesktop.org/${PN}/${PN}"
else
	SRC_URI="https://freedesktop.org/software/${PN}/releases/${MY_P}.tar.xz"
	KEYWORDS="~alpha amd64 arm arm64 ~hppa ~ia64 ppc ppc64 ~riscv sparc x86 ~amd64-linux ~x86-linux"
fi

# libpulse-simple and libpulse link to libpulse-core; this is daemon's
# library and can link to gdbm and other GPL-only libraries. In this
# cases, we have a fully GPL-2 package. Leaving the rest of the
# GPL-forcing USE flags for those who use them.
LICENSE="!gdbm? ( LGPL-2.1 ) gdbm? ( GPL-2 )"

SLOT="0"

# +alsa-plugin as discussed in bug #519530
# TODO: Deal with bluez5-gstreamer - requires ldacenc and rtpldacpay gstreamer elements
# TODO: Find out why webrtc-aec is + prefixed - there's already the always available speexdsp-aec
# NOTE: The current ebuild sets +X almost certainly just for the pulseaudio.desktop file
IUSE="+alsa +alsa-plugin +asyncns bluetooth dbus +daemon doc elogind equalizer +gdbm
gstreamer +glib gtk ipv6 jack lirc native-headset ofono-headset +orc oss selinux sox ssl systemd
system-wide tcpd test +udev +webrtc-aec +X zeroconf"

RESTRICT="!test? ( test )"

# See "*** BLUEZ support not found (requires D-Bus)" in configure.ac
# Basically all IUSE are either ${MULTILIB_USEDEP} for client libs or they belong under !daemon ()
# We duplicate alsa-plugin, {native,ofono}-headset under daemon to let users deal with them at once
REQUIRED_USE="
	alsa-plugin? ( alsa )
	bluetooth? ( dbus )
	daemon? ( ?? ( elogind systemd ) )
	!daemon? (
		!alsa
		!alsa-plugin
		!bluetooth
		!equalizer
		!gdbm
		!gstreamer
		!gtk
		!jack
		!lirc
		!native-headset
		!ofono-headset
		!orc
		!oss
		!sox
		!ssl
		!system-wide
		!udev
		!webrtc-aec
		!zeroconf
	)
	equalizer? ( dbus )
	native-headset? ( bluetooth )
	ofono-headset? ( bluetooth )
	udev? ( || ( alsa oss ) )
	zeroconf? ( dbus )
"

BDEPEND="
	dev-lang/perl
	dev-perl/XML-Parser
	sys-devel/gettext
	sys-devel/m4
	virtual/libiconv
	virtual/libintl
	virtual/pkgconfig
	doc? ( app-doc/doxygen )
	orc? ( >=dev-lang/orc-0.4.15 )
	system-wide? ( dev-util/unifdef )
"

# NOTE:
# - libpcre needed in some cases, bug #472228
# - media-libs/speexdsp is providing echo canceller implementation
COMMON_DEPEND="
	>=media-libs/libsndfile-1.0.20[${MULTILIB_USEDEP}]
	>=media-libs/speexdsp-1.2[${MULTILIB_USEDEP}]
	virtual/libc
	alsa? ( >=media-libs/alsa-lib-1.0.24 )
	asyncns? ( >=net-libs/libasyncns-0.1[${MULTILIB_USEDEP}] )
	bluetooth? (
		>=net-wireless/bluez-5
		media-libs/sbc
	)
	daemon? (
		dev-libs/libltdl
		sys-kernel/linux-headers
		>=sys-libs/libcap-2.22-r2
	)
	dbus? ( >=sys-apps/dbus-1.4.12[${MULTILIB_USEDEP}] )
	elogind? ( sys-auth/elogind )
	equalizer? (
		sci-libs/fftw:3.0
	)
	gdbm? ( sys-libs/gdbm:= )
	glib? ( >=dev-libs/glib-2.28.0:2[${MULTILIB_USEDEP}] )
	gstreamer? (
		media-libs/gst-plugins-base
		>=media-libs/gstreamer-1.14
	)
	gtk? ( x11-libs/gtk+:3 )
	jack? ( virtual/jack )
	lirc? ( app-misc/lirc )
	ofono-headset? ( >=net-misc/ofono-1.13 )
	orc? ( >=dev-lang/orc-0.4.15 )
	selinux? ( sec-policy/selinux-pulseaudio )
	sox? ( >=media-libs/soxr-0.1.1 )
	ssl? ( dev-libs/openssl:= )
	systemd? ( sys-apps/systemd:= )
	tcpd? ( sys-apps/tcp-wrappers )
	udev? ( >=virtual/udev-143[hwdb(+)] )
	webrtc-aec? ( >=media-libs/webrtc-audio-processing-0.2:0 )
	X? (
		>=x11-libs/libxcb-1.6[${MULTILIB_USEDEP}]
		daemon? (
			x11-libs/libICE
			x11-libs/libSM
			>=x11-libs/libX11-1.4.0
			>=x11-libs/libXtst-1.0.99.2
		)
	)
	zeroconf? ( >=net-dns/avahi-0.6.12[dbus] )
"

# pulseaudio ships a bundle xmltoman, which uses XML::Parser
DEPEND="
	${COMMON_DEPEND}
	dev-libs/libatomic_ops
	dev-libs/libpcre:*
	test? ( >=dev-libs/check-0.9.10 )
	X? ( x11-base/xorg-proto )
"

# alsa-utils dep is for the alsasound init.d script (see bug 155707); TODO: read it
# NOTE: Only system-wide needs acct-group/audio unless elogind/systemd is not used
RDEPEND="
	${COMMON_DEPEND}
	system-wide? (
		alsa? ( media-sound/alsa-utils )
		acct-user/pulse
		acct-group/audio
		acct-group/pulse-access
	)
"

# This is a PDEPEND to avoid a circular dep
PDEPEND="
	alsa? ( alsa-plugin? ( >=media-plugins/alsa-plugins-1.0.27-r1[pulseaudio,${MULTILIB_USEDEP}] ) )
"

DOCS=( NEWS README )

S="${WORKDIR}/${MY_P}"

PATCHES=(
	"${FILESDIR}"/pulseaudio-15.0-xice-xsm-xtst-daemon-only.patch
)

src_prepare() {
	default

	gnome2_environment_reset
}

multilib_src_configure() {
	local emesonargs=(
		--localstatedir="${EPREFIX}"/var

		$(meson_native_use_bool daemon)
		$(meson_native_use_bool doc doxygen)
		-Dgcov=false
		# tests involve random modules, so just do them for the native # TODO: tests should run always
		$(meson_native_use_bool test tests)
		-Ddatabase=$(multilib_native_usex gdbm gdbm simple) # tdb is also an option but no one cares about it
		-Dstream-restore-clear-old-devices=true
		-Drunning-from-build-tree=false

		# Paths
		-Dmodlibexecdir="${EPREFIX}/usr/$(get_libdir)/${PN}/modules" # Was $(get_libdir)/${P}
		-Dsystemduserunitdir=$(systemd_get_userunitdir)
		-Dudevrulesdir="${EPREFIX}$(get_udevdir)/rules.d"
		-Dbashcompletiondir="$(get_bashcompdir)" # Alternatively DEPEND on app-shells/bash-completion for pkg-config to provide the value

		# Optional features
		$(meson_native_use_feature alsa)
		$(meson_feature asyncns)
		$(meson_native_use_feature zeroconf avahi)
		$(meson_native_use_feature bluetooth bluez5)
		-Dbluez5-gstreamer=disabled # no ldacenc/rtpldacpay gst elements packaged yet
		$(meson_native_use_bool native-headset bluez5-native-headset)
		$(meson_native_use_bool ofono-headset bluez5-ofono-headset)
		$(meson_feature dbus)
		$(meson_native_use_feature elogind)
		$(meson_native_use_feature equalizer fftw)
		$(meson_feature glib) # WARNING: toggling this likely changes ABI
		$(meson_native_use_feature glib gsettings) # Supposedly correct?
		$(meson_native_use_feature gstreamer)
		$(meson_native_use_feature gtk)
		-Dhal-compat=true # Consider disabling on next revbump
		$(meson_use ipv6)
		$(meson_native_use_feature jack)
		$(meson_native_use_feature lirc)
		$(meson_native_use_feature ssl openssl)
		$(meson_native_use_feature orc)
		$(meson_native_use_feature oss oss-output)
		-Dsamplerate=disabled # Matches upstream
		$(meson_native_use_feature sox soxr)
		-Dspeex=enabled
		$(meson_native_use_feature systemd)
		$(meson_native_use_feature tcpd tcpwrap) # TODO: This should technically be enabled for 32bit too, but at runtime it probably is never used without daemon?
		$(meson_native_use_feature udev)
		-Dvalgrind=auto
		$(meson_feature X x11)

		# Echo cancellation
		-Dadrian-aec=false # Not packaged?
		$(meson_native_use_feature webrtc-aec)
	)

	if multilib_is_native_abi; then
		# Make padsp work for non-native ABI, supposedly only possible with glibc;
		# this is used by /usr/bin/padsp that comes from native build, thus we need
		# this argument for native build
		if use elibc_glibc; then
			emesonargs+=( -Dpulsedsp-location="${EPREFIX}"'/usr/\\$$LIB/pulseaudio' )
		fi
	else
		emesonargs+=( -Dman=false )
		if ! use elibc_glibc; then
			# Non-glibc multilib is probably non-existent but just in case:
			ewarn "padsp wrapper for OSS emulation will only work with native ABI applications!"
		fi
	fi

	meson_src_configure
}

multilib_src_compile() {
	meson_src_compile

	if multilib_is_native_abi; then
		if use doc; then
			einfo "Generating documentation ..."
			meson_src_compile doxygen
		fi
	fi
}

multilib_src_install() {
	# The files referenced in the DOCS array do not exist in the multilib source directory,
	# therefore clear the variable when calling the function that will access it.
	DOCS= meson_src_install

	if multilib_is_native_abi; then
		if use doc; then
			einfo "Installing documentation ..."
			docinto html
			dodoc -r doxygen/html/.
		fi
	fi
}

multilib_src_install_all() {
	einstalldocs

	if use system-wide; then
		newconfd "${FILESDIR}"/pulseaudio.conf.d pulseaudio

		use_define() {
			local define=${2:-$(echo ${1} | tr '[:lower:]' '[:upper:]')}

			use "${1}" && echo "-D${define}" || echo "-U${define}"
		}

		unifdef -x 1 \
			$(use_define zeroconf AVAHI) \
			$(use_define alsa) \
			$(use_define bluetooth) \
			$(use_define udev) \
			"${FILESDIR}"/pulseaudio.init.d-5 \
			> "${T}"/pulseaudio \
			|| die

		doinitd "${T}"/pulseaudio

		systemd_dounit "${FILESDIR}"/${PN}.service

		# We need /var/run/pulse, bug 442852
		newtmpfiles "${FILESDIR}"/${PN}.tmpfiles ${PN}.conf
	else
		# Prevent warnings when system-wide is not used, bug 447694
		if use dbus && use daemon; then
			rm "${ED}"/etc/dbus-1/system.d/pulseaudio-system.conf || die
		fi
	fi

	if use zeroconf; then
		sed -i \
			-e '/module-zeroconf-publish/s:^#::' \
			"${ED}/etc/pulse/default.pa" \
			|| die
	fi

	find "${ED}" \( -name '*.a' -o -name '*.la' \) -delete || die
}

pkg_postinst() {
	gnome2_schemas_update

	if use system-wide; then
		tmpfiles_process "${PN}.conf"

		elog "You have enabled the 'system-wide' USE flag for pulseaudio."
		elog "This mode should only be used on headless servers, embedded systems,"
		elog "or thin clients. It will usually require manual configuration, and is"
		elog "incompatible with many expected pulseaudio features."
		elog "On normal desktop systems, system-wide mode is STRONGLY DISCOURAGED."
		elog ""
		elog "For more information, see"
		elog "    https://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/User/WhatIsWrongWithSystemWide/"
		elog "    https://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/User/SystemWide/"
		elog "    https://wiki.gentoo.org/wiki/PulseAudio#Headless_server"
		elog ""
	fi

	if use equalizer; then
		elog "You will need to load some extra modules to make qpaeq work."
		elog "You can do that by adding the following two lines in"
		elog "/etc/pulse/default.pa and restarting pulseaudio:"
		elog "load-module module-equalizer-sink"
		elog "load-module module-dbus-protocol"
		elog ""
	fi

	if use native-headset && use ofono-headset; then
		elog "You have enabled both native and ofono headset profiles. The runtime decision"
		elog "which to use is done via the 'headset' argument of module-bluetooth-discover."
		elog ""
	fi

	if use systemd && use daemon; then
		elog "It's recommended to start pulseaudio via its systemd user units:"
		elog ""
		elog "  systemctl --user enable pulseaudio.service pulseaudio.socket"
		elog ""
		elog "The change from autospawn to user units will take effect after restarting."
		elog ""
	fi

	optfeature_header "PulseAudio can be enhanced by installing the following:"
	use equalizer && optfeature "using the qpaeq script" dev-python/PyQt5[dbus,widgets]
	use dbus && optfeature "restricted realtime capabilities via D-Bus" sys-auth/rtkit
}

pkg_postrm() {
	gnome2_schemas_update
}