66 lines
2.2 KiB
Nix
66 lines
2.2 KiB
Nix
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{ lib }:
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rec {
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## Renames an alsa device from a given `name` using the new `description`.
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##
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#@ { name: String, description: String } -> { matches: List, apply_properties: Attrs }
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mkAlsaRename = { name, description }: {
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matches = [
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[
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[ "device.name" "matches" name ]
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]
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];
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# actions = { "update-props" = { "node.description" = description; }; };
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apply_properties = {
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"device.description" = description;
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};
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};
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## Create a pipewire audio node.
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##
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#@ { name: String, factory: String ? "adapter", ... } -> { factory: String, args: Attrs }
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mkAudioNode = args@{ name, factory ? "adapter", ... }: {
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inherit factory;
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args = (builtins.removeAttrs args [ "name" "description" ]) // {
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"node.name" = name;
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"node.description" = args.description or args."node.description";
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"factory.name" = args."factory.name" or "support.null-audio-sink";
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};
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};
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## Create a virtual pipewire audio node.
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##
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#@ { name: String, ... } -> { factory: "adapter", args: Attrs }
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mkVirtualAudioNode = args@{ name, ... }:
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mkAudioNode (args // {
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name = "virtual-${lib.toLower name}-audio";
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description = "${name} (Virtual)";
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"media.class" = args.class or args."media.class" or "Audio/Duplex";
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"object.linger" = args."object.linger" or true;
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"audio.position" = args."audio.position" or [ "FL" "FR" ];
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"monitor.channel-volumes" = args."monitor.channel-volumes" or true;
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});
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## Connect two pipewire audio nodes
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##
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#@ { name: String?, from: String, to: String, ... } -> { name: "libpipewire-module-loopback", args: Attrs }
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mkBridgeAudioModule = args@{ from, to, ... }: {
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name = "libpipewire-module-loopback";
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args = (builtins.removeAttrs args [ "from" "to" "name" ]) // {
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"node.name" =
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if args ? name then
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"${args.name}-bridge"
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else
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"${lib.toLower from}-to-${lib.toLower to}-bridge";
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"audio.position" = args."audio.position" or [ "FL" "FR" ];
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"capture.props" = {
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"node.target" = from;
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} // (args."capture.props" or { });
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"playback.props" = {
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"node.target" = to;
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"monitor.channel-volumes" = true;
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} // (args."playback.props" or { });
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};
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};
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}
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