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nixos/jack,pulseaudio: fix pulse connection to jackd service 

This fixes the case when Jack Audio Daemon is running
as a service via `services.jack.jackd` and Pulseaudio
running as a *user* service.

Two issues prevented connecting `pulse` with `jackd`:
* Missing `JACK_PROMISCUOUS_SERVER` environment variable for `pulse` user service,
  resulting in `pulse` trying to access `jackd` as if it was running as part of
  the users session.
* `jackd` not being able to access socket created by `pulse` due to socket
  created using user ID and `users` group. Change allows `jackd` to access
  the socket created by `pulse` correctly.

`pulse` now also autoloads `module-jack-sink` and `module-jack-source`
if `services.jack.jackd.enable` is set.

The default `pulse` package is now set to `pulseaudioFull` automatically
if `services.jack.jackd.enable` is set.
This commit is contained in:
Richard Marko 2020-07-18 13:32:48 +02:00
parent f3bf0f173e
commit f54612264e
2 changed files with 10 additions and 1 deletions
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8
nixos/modules/config/pulseaudio.nix
View File

@ -36,6 +36,8 @@ let
${addModuleIf cfg.zeroconf.discovery.enable "module-zeroconf-discover"}
${addModuleIf cfg.tcp.enable (concatStringsSep " "
([ "module-native-protocol-tcp" ] ++ allAnon ++ ipAnon))}
${addModuleIf config.services.jack.jackd.enable "module-jack-sink"}
${addModuleIf config.services.jack.jackd.enable "module-jack-source"}
${cfg.extraConfig}
'';
};
@ -144,7 +146,9 @@ in {
package = mkOption {
type = types.package;
default = pkgs.pulseaudio;
default = if config.services.jack.jackd.enable
then pkgs.pulseaudioFull
else pkgs.pulseaudio;
defaultText = "pkgs.pulseaudio";
example = literalExample "pkgs.pulseaudioFull";
description = ''
@ -284,6 +288,8 @@ in {
RestartSec = "500ms";
PassEnvironment = "DISPLAY";
};
} // optionalAttrs config.services.jack.jackd.enable {
environment.JACK_PROMISCUOUS_SERVER = "jackaudio";
};
sockets.pulseaudio = {
wantedBy = [ "sockets.target" ];

3
nixos/modules/services/audio/jack.nix
View File

@ -246,6 +246,9 @@ in {
description = "JACK Audio Connection Kit";
serviceConfig = {
User = "jackaudio";
SupplementaryGroups = lib.optional
(config.hardware.pulseaudio.enable
&& !config.hardware.pulseaudio.systemWide) "users";
ExecStart = "${cfg.jackd.package}/bin/jackd ${lib.escapeShellArgs cfg.jackd.extraOptions}";
LimitRTPRIO = 99;
LimitMEMLOCK = "infinity";