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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";
};
balance = mkOption {
type = types.nullOr types.str;
default = null;
description = "Volumes of mixers are multiplied with their balances, this is the name of the file that contains the factor for this mixer";
};
initialBalance = mkOption {
type = types.str;
default = "1";
description = "Initial balance";
};
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}
${onConnect}
'';
connect = (connectOut != []) || (connectIn != []) || (onConnect != []);
mixerDeps = filter (x: any (hasPrefix (x + ":")) connectIn || any (hasPrefix (x + ":")) connectOut) (attrNames cfg);
trivmixArgs = let
dirName = if isNull group then name else group;
in [ "--fps" cfg.fps "--interval" cfg.interval "--client" name "--level" initial "--initial-balance" initialBalance ]
++ optionals connect ["--run" connectScript]
++ optionals (adjustable && (! isNull balance)) ["--balance" "/dev/shm/mix/${dirName}/${balance}"]
++ optional (adjustable && isNull group) "/dev/shm/mix/${name}/level"
++ optional (! isNull group) "/dev/shm/mix/${group}/level";
in {
wantedBy = [ "sound.target" ];
bindsTo = [ "jack.service" ] ++ map (n: n + ".service") mixerDeps;
after = [ "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";
WatchdogSec = "2";
};
script = ''
exec -a trivmix -- trivmix ${escapeShellArgs trivmixArgs}
'';
};
in {
options.services.trivmix = {
mixers = mkOption {
type = types.attrsOf (types.submodule mixerModule);
default = {};
description = "Definition of mixers";
};
fps = mkOption {
type = types.str;
default = "200";
};
interval = mkOption {
type = types.str;
default = "0.2";
};
};
config = mkIf (cfg.mixers != {}) {
nixpkgs.overlays = [(self: super: {
trivmix = self.haskellPackages.callPackage ./trivmix {};
})];
environment.systemPackages = with pkgs; [ trivmix ];
systemd.services = mapAttrs service cfg.mixers;
};
}
|
