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{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.trivmix;
mixerModule = {
options = {
connectIn = mkOption {
type = with types; coercedTo str singleton (listOf str);
default = [];
description = "Ports to connect mixer input to";
};
connectOut = mkOption {
type = with types; coercedTo str singleton (listOf str);
default = [];
description = "Ports to connect mixer output to";
};
onConnect = mkOption {
type = types.lines;
default = "";
description = "Additional shell commands to run after connections are set up";
};
adjustable = mkOption {
type = types.bool;
default = true;
description = "Should the volume on this mixer be adjustable?";
};
group = mkOption {
type = types.nullOr types.str;
default = null;
description = "Volumes of mixers that share a group name are synchronised";
};
initial = mkOption {
type = types.str;
default = "1";
description = "Initial volume";
};
};
};
service = name: mixerCfg: with mixerCfg; let
connectScript = pkgs.writeScript "connect" ''
#!${pkgs.stdenv.shell}
${concatMapStringsSep "\n" (port: "jack_connect ${port} $1") connectIn}
${concatMapStringsSep "\n" (port: "jack_connect $2 ${port}") connectOut}
${onConnect}
'';
connect = (connectOut != []) || (connectIn != []) || (onConnect != []);
mixerDeps = filter (x: any (hasPrefix (x + ":")) connectIn || any (hasPrefix (x + ":")) connectOut) (attrNames cfg);
trivmixArgs = [ "--client" name "--level" initial ]
++ optionals connect ["--run" connectScript]
++ optional (adjustable && isNull group) "/dev/shm/mix/${name}/level"
++ optional (! isNull group) "/dev/shm/mix/${group}/level";
in {
wantedBy = [ "sound.target" ];
requires = [ "jack.service" ] ++ map (n: n + ".service") mixerDeps;
path = with pkgs; [ jack2Full trivmix ];
serviceConfig = {
Type = "notify";
User = "jack";
Group = "audio";
Nice = "-10";
LimitRTPRIO = "95:95";
LimitMEMLOCK = "infinity";
};
script = "trivmix ${escapeShellArgs trivmixArgs}";
};
in {
options.services.trivmix = mkOption {
type = types.attrsOf (types.submodule mixerModule);
default = {};
description = "Definition of mixers";
};
config.systemd.services = mapAttrs service cfg;
}
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