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|
{ config, lib, mylib, pkgs, ... }: let
pkg = pkgs.pulseaudio;
runDir = "/run/pulse";
pkgs_i686 = pkgs.pkgsi686Linux;
support32Bit =
pkgs.stdenv.isx86_64 &&
pkgs_i686.alsaLib != null &&
pkgs_i686.libpulseaudio != null;
alsaConf = pkgs.writeText "asound.conf" ''
ctl_type.pulse {
libs.native = ${pkgs.alsaPlugins}/lib/alsa-lib/libasound_module_ctl_pulse.so;
${lib.optionalString support32Bit
"libs.32Bit = ${pkgs_i686.alsaPlugins}/lib/alsa-lib/libasound_module_ctl_pulse.so;"}
}
pcm_type.pulse {
libs.native = ${pkgs.alsaPlugins}/lib/alsa-lib/libasound_module_pcm_pulse.so;
${lib.optionalString support32Bit
"libs.32Bit = ${pkgs_i686.alsaPlugins}/lib/alsa-lib/libasound_module_pcm_pulse.so;"}
}
ctl.!default {
type pulse
}
pcm.!default {
type pulse
}
'';
clientConf = pkgs.writeText "client.conf" ''
autospawn=no
default-server = unix:${runDir}/socket
'';
configFile = pkgs.writeText "default.pa" ''
.include ${pkg}/etc/pulse/default.pa
load-module ${toString [
"module-native-protocol-unix"
"auth-anonymous=1"
"socket=${runDir}/socket"
]}
${lib.optionalString (config.krebs.build.host.name == "au") ''
load-module ${toString [
"module-native-protocol-tcp"
"auth-ip-acl=127.0.0.1;10.23.1.0/24"
]}
''}
${lib.optionalString (config.krebs.build.host.name != "au") ''
load-module ${toString [
"module-tunnel-sink-new"
"server=au.hkw"
"sink_name=au"
"channels=2"
"rate=44100"
]}
''}
'';
in
{
environment = {
etc = {
"asound.conf".source = alsaConf;
# XXX mkForce is not strong enough (and neither is mkOverride) to create
# /etc/pulse/client.conf, see pulseaudio-hack below for a solution.
#"pulse/client.conf" = mkForce { source = clientConf; };
#"pulse/client.conf".source = mkForce clientConf;
"pulse/default.pa".source = configFile;
};
systemPackages = [
pkg
] ++ lib.optionals config.services.xserver.enable [
pkgs.pavucontrol
];
};
hardware.pulseaudio = {
inherit support32Bit;
};
# Allow PulseAudio to get realtime priority using rtkit.
security.rtkit.enable = true;
system.activationScripts.pulseaudio-hack = ''
ln -fns ${clientConf} /etc/pulse/client.conf
'';
systemd.services.pulse = {
wantedBy = [ "sound.target" ];
before = [ "sound.target" ];
environment = {
PULSE_RUNTIME_PATH = "${runDir}/home";
};
serviceConfig = {
ExecStart = "${pkg}/bin/pulseaudio --exit-idle-time=-1";
ExecStartPre = pkgs.writeDash "pulse-start" ''
install -o pulse -g pulse -m 0750 -d ${runDir}
install -o pulse -g pulse -m 0700 -d ${runDir}/home
'';
PermissionsStartOnly = "true";
User = "pulse";
};
};
# TODO assert that pulse is the only user with "audio" in group/extraGroups
# otherwise the audio device can be hijacked while the pulse service restarts
# (e.g. when mpv is running) and then the service will fail.
users = {
groups.pulse.gid = config.users.users.pulse.uid;
users.pulse = {
uid = mylib.genid_uint31 "pulse";
group = "pulse";
extraGroups = [ "audio" ];
home = "${runDir}/home";
isSystemUser = true;
};
};
}
|
