149 lines
4 KiB
Nix
149 lines
4 KiB
Nix
{ config, pkgs, ... }:
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with pkgs.lib;
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with pkgs;
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let
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cfg = config.hardware.pulseaudio;
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uid = config.ids.uids.pulseaudio;
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gid = config.ids.gids.pulseaudio;
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pulseRuntimePath = "/var/run/pulse";
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# Create pulse/client.conf even if PulseAudio is disabled so
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# that we can disable the autospawn feature in programs that
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# are built with PulseAudio support (like KDE).
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clientConf = writeText "client.conf" ''
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autospawn=${if (cfg.enable && !cfg.systemWide) then "yes" else "no"}
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${optionalString (cfg.enable && !cfg.systemWide)
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"daemon-binary=${cfg.package}/bin/pulseaudio"}
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'';
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# Write an /etc/asound.conf that causes all ALSA applications to
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# be re-routed to the PulseAudio server through ALSA's Pulse
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# plugin.
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alsaConf = writeText "asound.conf" ''
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pcm_type.pulse {
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lib ${alsaPlugins}/lib/alsa-lib/libasound_module_pcm_pulse.so
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}
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pcm.!default {
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type pulse
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hint.description "Default Audio Device (via PulseAudio)"
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}
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ctl_type.pulse {
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lib ${alsaPlugins}/lib/alsa-lib/libasound_module_ctl_pulse.so
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}
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ctl.!default {
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type pulse
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}
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'';
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in {
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options = {
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hardware.pulseaudio = {
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enable = mkOption {
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default = false;
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description = ''
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Whether to enable the PulseAudio sound server.
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'';
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};
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systemWide = mkOption {
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type = types.bool;
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default = false;
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description = ''
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If false, a PulseAudio server is launched automatically for
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each user that tries to use the sound system. The server runs
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with user privileges. This is the recommended and most secure
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way to use PulseAudio. If true, one system-wide PulseAudio
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server is launched on boot, running as the user "pulse".
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Please read the PulseAudio documentation for more details.
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'';
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};
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configFile = mkOption {
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type = types.uniq types.path;
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default = "${pulseaudio}/etc/pulse/default.pa";
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description = ''
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The path to the configuration the PulseAudio server
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should use. By default, the "default.pa" configuration
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from the PulseAudio distribution is used.
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'';
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};
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package = mkOption {
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default = pulseaudio;
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example = "pulseaudio.override { jackaudioSupport = true; }";
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description = ''
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The PulseAudio derivation to use. This can be used to enable
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features (such as JACK support) that are not enabled in the
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default PulseAudio in Nixpkgs.
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'';
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};
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};
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};
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config = mkMerge [
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{
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environment.etc = singleton {
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target = "pulse/client.conf";
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source = clientConf;
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};
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}
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(mkIf cfg.enable {
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environment.systemPackages = [ cfg.package ];
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environment.etc = singleton {
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target = "asound.conf";
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source = alsaConf;
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};
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# Allow PulseAudio to get realtime priority using rtkit.
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security.rtkit.enable = true;
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})
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(mkIf (cfg.enable && !cfg.systemWide) {
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environment.etc = singleton {
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target = "pulse/default.pa";
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source = cfg.configFile;
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};
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})
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(mkIf (cfg.enable && cfg.systemWide) {
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users.extraUsers.pulse = {
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# For some reason, PulseAudio wants UID == GID.
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uid = assert uid == gid; uid;
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group = "pulse";
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extraGroups = [ "audio" ];
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description = "PulseAudio system service user";
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home = pulseRuntimePath;
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};
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users.extraGroups.pulse.gid = gid;
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systemd.services.pulseaudio = {
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description = "PulseAudio system-wide server";
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wantedBy = [ "sound.target" ];
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before = [ "sound.target" ];
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path = [ cfg.package ];
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environment.PULSE_RUNTIME_PATH = pulseRuntimePath;
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preStart = ''
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mkdir -p --mode 755 ${pulseRuntimePath}
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chown -R pulse:pulse ${pulseRuntimePath}
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'';
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script = ''
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exec pulseaudio --system -n --file="${cfg.configFile}"
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'';
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};
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})
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];
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}
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