From f5af1066c93b340e4c99d7598f3982cf33d41124 Mon Sep 17 00:00:00 2001
From: Gregor Kleen <gkleen@yggdrasil.li>
Date: Tue, 8 Mar 2022 13:47:49 +0100
Subject: sif: pipewire realtime

---
 hosts/sif/default.nix | 78 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 78 insertions(+)

diff --git a/hosts/sif/default.nix b/hosts/sif/default.nix
index 7cce8af0..4e099f38 100644
--- a/hosts/sif/default.nix
+++ b/hosts/sif/default.nix
@@ -337,6 +337,84 @@ in {
       jack.enable = true;
       media-session.enable = false;
       wireplumber.enable = true;
+      config.pipewire = {
+        "context.properties" = {
+          "link.max-buffers" = 16;
+          "log.level" = 2;
+          "default.clock.rate" = 192000;
+          "default.clock.quantum" = 1024;
+          "default.clock.min-quantum" = 32;
+          "default.clock.max-quantum" = 2048;
+          "core.daemon" = true;
+          "core.name" = "pipewire-0";
+        };
+        "context.modules" = [
+          {
+            name = "libpipewire-module-rtkit";
+            args = {
+              "nice.level" = -15;
+              "rt.prio" = 88;
+              "rt.time.soft" = 200000;
+              "rt.time.hard" = 200000;
+            };
+            flags = [ "ifexists" "nofail" ];
+          }
+          { name = "libpipewire-module-protocol-native"; }
+          { name = "libpipewire-module-profiler"; }
+          { name = "libpipewire-module-metadata"; }
+          { name = "libpipewire-module-spa-device-factory"; }
+          { name = "libpipewire-module-spa-node-factory"; }
+          { name = "libpipewire-module-client-node"; }
+          { name = "libpipewire-module-client-device"; }
+          {
+            name = "libpipewire-module-portal";
+            flags = [ "ifexists" "nofail" ];
+          }
+          {
+            name = "libpipewire-module-access";
+            args = {};
+          }
+          { name = "libpipewire-module-adapter"; }
+          { name = "libpipewire-module-link-factory"; }
+          { name = "libpipewire-module-session-manager"; }
+        ];
+      };
+      config.pipewire-pulse = {
+        "context.properties" = {
+          "log.level" = 2;
+        };
+        "context.modules" = [
+          {
+            name = "libpipewire-module-rtkit";
+            args = {
+              "nice.level" = -15;
+              "rt.prio" = 88;
+              "rt.time.soft" = 200000;
+              "rt.time.hard" = 200000;
+            };
+            flags = [ "ifexists" "nofail" ];
+          }
+          { name = "libpipewire-module-protocol-native"; }
+          { name = "libpipewire-module-client-node"; }
+          { name = "libpipewire-module-adapter"; }
+          { name = "libpipewire-module-metadata"; }
+          {
+            name = "libpipewire-module-protocol-pulse";
+            args = {
+              "pulse.min.req" = "32/192000";
+              "pulse.default.req" = "1024/192000";
+              "pulse.max.req" = "2048/192000";
+              "pulse.min.quantum" = "32/192000";
+              "pulse.max.quantum" = "2048/192000";
+              "server.address" = [ "unix:native" ];
+            };
+          }
+        ];
+        "stream.properties" = {
+          "node.latency" = "2048/192000";
+          "resample.quality" = 1;
+        };
+      };
     };
 
     hardware = {
-- 
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