286 lines
8.5 KiB
Nix
286 lines
8.5 KiB
Nix
{ config, lib, pkgs, pkgs_i686, ... }:
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with pkgs;
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with lib;
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let
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cfg = config.hardware.pulseaudio;
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systemWide = cfg.enable && cfg.systemWide;
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nonSystemWide = cfg.enable && !cfg.systemWide;
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hasZeroconf = let z = cfg.zeroconf; in z.publish.enable || z.discovery.enable;
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overriddenPackage = cfg.package.override
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(optionalAttrs hasZeroconf { zeroconfSupport = true; });
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binary = "${getBin overriddenPackage}/bin/pulseaudio";
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binaryNoDaemon = "${binary} --daemonize=no";
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# Forces 32bit pulseaudio and alsaPlugins to be built/supported for apps
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# using 32bit alsa on 64bit linux.
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enable32BitAlsaPlugins = cfg.support32Bit && stdenv.isx86_64 && (pkgs_i686.alsaLib != null && pkgs_i686.libpulseaudio != null);
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myConfigFile =
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let
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addModuleIf = cond: mod: optionalString cond "load-module ${mod}";
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allAnon = optional cfg.tcp.anonymousClients.allowAll "auth-anonymous=1";
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ipAnon = let a = cfg.tcp.anonymousClients.allowedIpRanges;
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in optional (a != []) ''auth-ip-acl=${concatStringsSep ";" a}'';
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in writeTextFile {
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name = "default.pa";
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text = ''
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.include ${cfg.configFile}
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${addModuleIf cfg.zeroconf.publish.enable "module-zeroconf-publish"}
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${addModuleIf cfg.zeroconf.discovery.enable "module-zeroconf-discover"}
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${addModuleIf cfg.tcp.enable (concatStringsSep " "
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([ "module-native-protocol-tcp" ] ++ allAnon ++ ipAnon))}
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${cfg.extraConfig}
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'';
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};
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ids = config.ids;
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uid = ids.uids.pulseaudio;
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gid = ids.gids.pulseaudio;
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stateDir = "/var/run/pulse";
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# Create pulse/client.conf even if PulseAudio is disabled so
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# that we can disable the autospawn feature in programs that
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# are built with PulseAudio support (like KDE).
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clientConf = writeText "client.conf" ''
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autospawn=${if nonSystemWide then "yes" else "no"}
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${optionalString nonSystemWide "daemon-binary=${binary}"}
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${cfg.extraClientConf}
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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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libs.native = ${pkgs.alsaPlugins}/lib/alsa-lib/libasound_module_pcm_pulse.so ;
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${lib.optionalString enable32BitAlsaPlugins
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"libs.32Bit = ${pkgs_i686.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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libs.native = ${pkgs.alsaPlugins}/lib/alsa-lib/libasound_module_ctl_pulse.so ;
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${lib.optionalString enable32BitAlsaPlugins
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"libs.32Bit = ${pkgs_i686.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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type = types.bool;
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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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support32Bit = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Whether to include the 32-bit pulseaudio libraries in the systemn or not.
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This is only useful on 64-bit systems and currently limited to x86_64-linux.
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'';
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};
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configFile = mkOption {
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type = types.nullOr types.path;
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description = ''
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The path to the default configuration options 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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extraConfig = mkOption {
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type = types.lines;
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default = "";
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description = ''
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Literal string to append to <literal>configFile</literal>
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and the config file generated by the pulseaudio module.
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'';
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};
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extraClientConf = mkOption {
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type = types.lines;
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default = "";
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description = ''
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Extra configuration appended to pulse/client.conf file.
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'';
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};
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package = mkOption {
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type = types.package;
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default = pulseaudioLight;
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defaultText = "pkgs.pulseaudioLight";
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example = literalExample "pkgs.pulseaudioFull";
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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, Bluetooth) via the
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<literal>pulseaudioFull</literal> package.
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'';
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};
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daemon = {
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logLevel = mkOption {
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type = types.str;
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default = "notice";
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description = ''
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The log level that the system-wide pulseaudio daemon should use,
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if activated.
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'';
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};
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};
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zeroconf = {
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discovery.enable =
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mkEnableOption "discovery of pulseaudio sinks in the local network";
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publish.enable =
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mkEnableOption "publishing the pulseaudio sink in the local network";
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};
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# TODO: enable by default?
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tcp = {
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enable = mkEnableOption "tcp streaming support";
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anonymousClients = {
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allowAll = mkEnableOption "all anonymous clients to stream to the server";
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allowedIpRanges = mkOption {
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type = types.listOf types.str;
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default = [];
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example = literalExample ''[ "127.0.0.1" "192.168.1.0/24" ]'';
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description = ''
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A list of IP subnets that are allowed to stream to the server.
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'';
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};
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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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hardware.pulseaudio.configFile = mkDefault "${getBin overriddenPackage}/etc/pulse/default.pa";
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}
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(mkIf cfg.enable {
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environment.systemPackages = [ overriddenPackage ];
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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 hasZeroconf {
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services.avahi.enable = true;
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})
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(mkIf cfg.zeroconf.publish.enable {
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services.avahi.publish.enable = true;
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services.avahi.publish.userServices = true;
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})
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(mkIf nonSystemWide {
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environment.etc = singleton {
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target = "pulse/default.pa";
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source = myConfigFile;
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};
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systemd.user = {
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services.pulseaudio = {
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description = "PulseAudio Server";
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# NixOS doesn't support "Also" so we bring it in manually
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wantedBy = [ "default.target" ];
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serviceConfig = {
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Type = "notify";
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ExecStart = binaryNoDaemon;
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Restart = "on-failure";
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RestartSec = "500ms";
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};
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environment = { DISPLAY = ":${toString config.services.xserver.display}"; };
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restartIfChanged = true;
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};
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sockets.pulseaudio = {
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description = "PulseAudio Socket";
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wantedBy = [ "sockets.target" ];
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socketConfig = {
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Priority = 6;
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Backlog = 5;
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ListenStream = "%t/pulse/native";
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};
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};
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};
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})
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(mkIf 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 = stateDir;
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createHome = true;
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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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environment.PULSE_RUNTIME_PATH = stateDir;
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serviceConfig = {
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Type = "notify";
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ExecStart = "${binaryNoDaemon} --log-level=${cfg.daemon.logLevel} --system -n --file=${myConfigFile}";
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Restart = "on-failure";
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RestartSec = "500ms";
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};
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};
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})
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];
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}
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