New wireplumber config

.config/wireplumber/scripts/default-nodes/find-best-default-node.lua

@@ -0,0 +1,41 @@
+-- WirePlumber
+--
+-- Copyright © 2022 Collabora Ltd.
+--
+-- SPDX-License-Identifier: MIT
+
+log = Log.open_topic ("s-default-nodes")
+
+nutils = require ("node-utils")
+
+SimpleEventHook {
+  name = "default-nodes/find-best-default-node",
+  interests = {
+    EventInterest {
+      Constraint { "event.type", "=", "select-default-node" },
+    },
+  },
+  execute = function (event)
+    local available_nodes = event:get_data ("available-nodes")
+    local selected_prio = event:get_data ("selected-node-priority") or 0
+    local selected_node = event:get_data ("selected-node")
+
+    available_nodes = available_nodes and available_nodes:parse ()
+    if not available_nodes then
+      return
+    end
+
+    for _, node_props in ipairs (available_nodes) do
+      -- Highest priority node wins
+      local priority = nutils.get_session_priority (node_props)
+
+      if priority > selected_prio or selected_node == nil then
+        selected_prio = priority
+        selected_node = node_props ["node.name"]
+      end
+    end
+
+    event:set_data ("selected-node-priority", selected_prio)
+    event:set_data ("selected-node", selected_node)
+  end
+}:register ()