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-rw-r--r--lass/2configs/pulse.nix96
1 files changed, 96 insertions, 0 deletions
diff --git a/lass/2configs/pulse.nix b/lass/2configs/pulse.nix
new file mode 100644
index 000000000..3be482191
--- /dev/null
+++ b/lass/2configs/pulse.nix
@@ -0,0 +1,96 @@
+{ config, lib, pkgs, ... }:
+
+with config.krebs.lib;
+let
+ pkg = pkgs.pulseaudioLight;
+ runDir = "/run/pulse";
+
+ alsaConf = pkgs.writeText "asound.conf" ''
+ ctl_type.pulse {
+ libs.native = ${pkgs.alsaPlugins}/lib/alsa-lib/libasound_module_ctl_pulse.so;
+ }
+ pcm_type.pulse {
+ libs.native = ${pkgs.alsaPlugins}/lib/alsa-lib/libasound_module_pcm_pulse.so;
+ }
+ ctl.!default {
+ type pulse
+ }
+ pcm.!default {
+ type pulse
+ }
+ '';
+
+ clientConf = pkgs.writeText "client.conf" ''
+ autospawn=no
+ default-server = unix:${runDir}/socket
+ '';
+
+ daemonConf = pkgs.writeText "daemon.conf" ''
+ exit-idle-time=0
+ flat-volumes = no
+ default-fragments = 4
+ default-fragment-size-msec = 25
+ '';
+
+ configFile = pkgs.writeText "default.pa" ''
+ .include ${pkg}/etc/pulse/default.pa
+ load-module ${toString [
+ "module-native-protocol-unix"
+ "auth-anonymous=1"
+ "socket=${runDir}/socket"
+ ]}
+ '';
+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;
+ "pulse/daemon.pa".source = daemonConf;
+ };
+ systemPackages = [
+ pkg
+ ] ++ optionals config.services.xserver.enable [
+ pkgs.pavucontrol
+ ];
+ };
+
+ # 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";
+ ExecStartPre = pkgs.writeDash "pulse-start" ''
+ install -o pulse -g audio -m 0750 -d ${runDir}
+ install -o pulse -g audio -m 0700 -d ${runDir}/home
+ '';
+ PermissionsStartOnly = "true";
+ User = "pulse";
+ };
+ };
+
+ users = {
+ groups.pulse.gid = config.users.users.pulse.uid;
+ users.pulse = {
+ uid = genid "pulse";
+ group = "pulse";
+ extraGroups = [ "audio" ];
+ home = "${runDir}/home";
+ };
+ };
+}