Use pulseaudio with absolute volume patches

flake.lock

@@ -411,6 +411,23 @@
         "type": "github"
       }
     },
+    "pulseaudio": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1616962871,
+        "narHash": "sha256-hUSMqLpFQgL8sv9fsc5E4WFZXsAHSuj/kqS9KxhghSk=",
+        "ref": "a2dp-avrcp-absolute-volume",
+        "rev": "7f58efcd7cc2e513c155f9504deda6d7a2e466ac",
+        "revCount": 9724,
+        "type": "git",
+        "url": "https://gitlab.freedesktop.org/MarijnS95/pulseaudio.git"
+      },
+      "original": {
+        "ref": "a2dp-avrcp-absolute-volume",
+        "type": "git",
+        "url": "https://gitlab.freedesktop.org/MarijnS95/pulseaudio.git"
+      }
+    },
     "root": {
       "inputs": {
         "NUR": "NUR",
@@ -428,6 +445,7 @@
         "nixpkgs": "nixpkgs_5",
         "nixpkgs-old": "nixpkgs-old",
         "nixpkgs-wayland": "nixpkgs-wayland",
+        "pulseaudio": "pulseaudio",
         "simple-nixos-mailserver": "simple-nixos-mailserver",
         "simple-osd-daemons": "simple-osd-daemons",
         "sonoff-lan": "sonoff-lan",

flake.nix

@@ -63,6 +63,10 @@
       url = "git+https://code.librehq.com/qhong/crdt.el";
       flake = false;
     };
+    pulseaudio = {
+      url = "git+https://gitlab.freedesktop.org/MarijnS95/pulseaudio.git?ref=a2dp-avrcp-absolute-volume";
+      flake = false;
+    };
   };
 
   outputs = { nixpkgs, nix, self, deploy-rs, ... }@inputs: {

modules/hardware.nix

@@ -1,4 +1,4 @@
-{ pkgs, config, lib, ... }:
+{ pkgs, config, lib, inputs, ... }:
 
 with rec { inherit (config) device deviceSpecific; };
 with deviceSpecific; {
@@ -23,7 +23,41 @@ with deviceSpecific; {
   sound.enable = true;
   hardware.pulseaudio = {
     enable = true;
-    package = pkgs.pulseaudioFull;
+    package = pkgs.callPackage ({ ... }:
+      let orig = pkgs.pulseaudioFull;
+      in pkgs.stdenv.mkDerivation rec {
+        pname = "pulseaudio";
+        version = "1.1.1"; # For compatibility
+        outputs = [ "out" "dev" ];
+        src = inputs.pulseaudio;
+        nativeBuildInputs = with pkgs; [
+          pkg-config
+          makeWrapper
+          perlPackages.perl
+          perlPackages.XMLParser
+
+          meson
+          ninja
+        ];
+        inherit (orig)
+          propagatedBuildInputs configureFlags installFlags postInstall
+          preFixup;
+        buildInputs = orig.buildInputs
+          ++ (with pkgs; [ libexecinfo tdb orc check ]);
+        preConfigure = ''
+          echo "$version" > .tarball-version
+        '';
+        mesonFlags = [
+          "-Dgtk=disabled"
+          "-Delogind=disabled"
+          "-Dvalgrind=disabled"
+          "-Dtcpwrap=disabled"
+          "-Dbluez5-gstreamer=disabled"
+          "-Dgstreamer=disabled"
+          "-Dsystemduserunitdir=lib/systemd/user"
+          "-Dudevrulesdir=lib/udev/rules.d"
+        ];
+      }) { };
     support32Bit = true;
     extraConfig = ''
       load-module module-native-protocol-tcp auth-ip-acl=127.0.0.1