From b1accb48a1d7c60fe8964e8d73afdfc1716bb69f Mon Sep 17 00:00:00 2001
From: Aly Raffauf <aly@raffauflabs.com>
Date: Tue, 15 Oct 2024 15:42:52 -0400
Subject: [PATCH] hwModules/legion/go: add convolver from legion-go-tricks
 (#127)

* hwModules/legion/go: add convolver from legion-go-tricks

* legion go: update sink names
---
 hwModules/lenovo/legion/go/default.nix | 72 +++++++++++++++++++++++++-
 1 file changed, 70 insertions(+), 2 deletions(-)

diff --git a/hwModules/lenovo/legion/go/default.nix b/hwModules/lenovo/legion/go/default.nix
index 9ef5d2cc..a14edfad 100644
--- a/hwModules/lenovo/legion/go/default.nix
+++ b/hwModules/lenovo/legion/go/default.nix
@@ -4,7 +4,16 @@
   pkgs,
   self,
   ...
-}: {
+}: let
+  legion-go-tricks = pkgs.fetchFromGitHub {
+    owner = "aarron-lee";
+    repo = "legion-go-tricks";
+    rev = "773f4dfa217989213ab2678d63a84dc306e8f8d4";
+    sha256 = "sha256-d5TB4kvNR7bwF5VyO1hxe8n9/PubtzWlBgvSmpUgDQc=";
+  };
+
+  convolverPath = "${legion-go-tricks}/experimental_sound_fix/multiwayCor48.wav";
+in {
   imports = [
     self.nixosModules.hw-common-amd-cpu
     self.nixosModules.hw-common-amd-gpu
@@ -40,5 +49,64 @@
     sensor.iio.enable = true;
   };
 
-  services.upower.enable = true;
+  services = {
+    pipewire.wireplumber.configPackages = [
+      (pkgs.writeTextDir "share/pipewire/pipewire.conf.d/10-legion-go-convolver.conf" ''
+        # Convolver Configuration for Pipewire
+        #
+        # This configuration applies separate left and right convolver effects using the corresponding impulse response files
+        # to the entire system audio output.
+
+        context.modules = [
+            { name = libpipewire-module-filter-chain
+                args = {
+                    node.description = "Legion Go"
+                    media.name       = "Legion Go"
+                    filter.graph = {
+                        nodes = [
+                            {
+                                type  = builtin
+                                label = convolver
+                                name  = convFL
+                                config = {
+                                    filename = "${convolverPath}"
+                                    channel  = 0
+                                }
+                            }
+                            {
+                                type  = builtin
+                                label = convolver
+                                name  = convFR
+                                config = {
+                                    filename = "${convolverPath}"
+                                    channel  = 1
+                                }
+                            }
+                        ]
+                        inputs = [ "convFL:In" "convFR:In" ]
+                        outputs = [ "convFL:Out" "convFR:Out" ]
+                    }
+                    capture.props = {
+                        node.name      = "Legion Go"
+                        media.class    = "Audio/Sink"
+                        priority.driver = 1000
+                        priority.session = 1000
+                        audio.channels = 2
+                        audio.position = [ FL FR ]
+                    }
+                    playback.props = {
+                        node.name      = "Legion Go corrected"
+                        node.passive   = true
+                        audio.channels = 2
+                        audio.position = [ FL FR ]
+                        node.target = "alsa_output.pci-0000_c2_00.6.analog-stereo"
+                    }
+                }
+            }
+        ]
+      '')
+    ];
+
+    upower.enable = true;
+  };
 }