{ config, lib, pkgs, ... }: with import <stockholm/lib>; let pkg = pkgs.pulseaudioLight; 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; ${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; ${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 ] ++ 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 ${runDir}/home ''; PermissionsStartOnly = "true"; User = "pulse"; }; }; # TODO assert that pulse is the only user with "audio" in group/extraGroups # otherwise the audio device can be hijacked while the pulse service restarts # (e.g. when mpv is running) and then the service will fail. users = { groups.pulse.gid = config.users.users.pulse.uid; users.pulse = { uid = genid_uint31 "pulse"; group = "pulse"; extraGroups = [ "audio" ]; home = "${runDir}/home"; isSystemUser = true; }; }; }