66 lines
1.3 KiB
Nix
66 lines
1.3 KiB
Nix
# ALSA sound support.
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{ config, pkgs, ... }:
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with pkgs.lib;
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let
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inherit (pkgs) alsaUtils;
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soundState = "/var/lib/alsa/asound.state";
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in
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{
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###### interface
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options = {
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sound = {
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enable = mkOption {
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default = true;
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description = ''
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Whether to enable ALSA sound.
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'';
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merge = mergeEnableOption;
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};
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enableOSSEmulation = mkOption {
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default = true;
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description = ''
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Whether to enable ALSA OSS emulation (with certain cards sound mixing may not work!).
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'';
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};
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};
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};
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###### implementation
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config = mkIf config.sound.enable {
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environment.systemPackages = [ alsaUtils ];
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# ALSA provides a udev rule for restoring volume settings.
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services.udev.packages = [ alsaUtils ];
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boot.kernelModules = optional config.sound.enableOSSEmulation "snd_pcm_oss";
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systemd.services."alsa-store" =
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{ description = "Store Sound Card State";
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wantedBy = [ "shutdown.target" ];
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before = [ "shutdown.target" ];
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unitConfig.DefaultDependencies = "no";
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serviceConfig.Type = "oneshot";
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serviceConfig.ExecStart = "${alsaUtils}/sbin/alsactl store --ignore";
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serviceConfig.ExecStartPre = "${pkgs.coreutils}/bin/mkdir -p /var/lib/alsa";
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};
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};
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}
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