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nixos/pipewire: add ALSA routing

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This code is based on the similar implementation for JACK.
This commit is contained in:
Nathaniel Glen 2020-07-23 14:47:11 -04:00
parent 7fcc9a4eaa
commit cd81d4043e
1 changed files with 41 additions and 4 deletions
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45
nixos/modules/services/desktops/pipewire.nix
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@ -5,7 +5,9 @@ with lib;
let
cfg = config.services.pipewire;
packages = with pkgs; [ pipewire ];
enable32BitAlsaPlugins = cfg.alsa.support32Bit
&& pkgs.stdenv.isx86_64
&& pkgs.pkgsi686Linux.pipewire != null;
in {
@ -25,17 +27,52 @@ in {
Automatically run pipewire when connections are made to the pipewire socket.
'';
};
alsa = {
enable = mkOption {
default = false;
type = types.bool;
description = ''
Route audio to/from generic ALSA-using applications via the ALSA PIPEWIRE PCM plugin.
'';
};
support32Bit = mkOption {
default = false;
type = types.bool;
description = ''
Whether to support sound for 32-bit ALSA applications on a 64-bit system.
'';
};
};
};
};
###### implementation
config = mkIf cfg.enable {
environment.systemPackages = packages;
environment.systemPackages = [ pkgs.pipewire ];
systemd.packages = packages;
systemd.packages = [ pkgs.pipewire ];
systemd.user.sockets.pipewire.wantedBy = lib.mkIf cfg.socketActivation [ "sockets.target" ];
};
sound.extraConfig = mkIf cfg.alsa.enable ''
pcm_type.pipewire {
libs.native = ${pkgs.pipewire.lib}/lib/alsa-lib/libasound_module_pcm_pipewire.so ;
${optionalString enable32BitAlsaPlugins
"libs.32Bit = ${pkgs.pkgsi686Linux.pipewire.lib}/lib/alsa-lib/libasound_module_pcm_pipewire.so ;"}
}
pcm.!default {
@func getenv
vars [ PCM ]
default "plug:pipewire"
playback_mode "-1"
capture_mode "-1"
}
'';
environment.etc."alsa/conf.d/50-pipewire.conf" = mkIf cfg.alsa.enable {
source = "${pkgs.pipewire}/share/alsa/alsa.conf.d/50-pipewire.conf";
};
};
}