Update

pipewire/.config/wireplumber/scripts/device/apply-profile.lua

@@ -0,0 +1,59 @@
+-- WirePlumber
+--
+-- Copyright © 2022 Collabora Ltd.
+--
+-- SPDX-License-Identifier: MIT
+
+-- apply the selected profile to the device
+
+cutils = require ("common-utils")
+log = Log.open_topic ("s-device")
+
+AsyncEventHook {
+  name = "device/apply-profile",
+  after = { "device/find-stored-profile", "device/find-preferred-profile", "device/find-best-profile" },
+  interests = {
+    EventInterest {
+      Constraint { "event.type", "=", "select-profile" },
+    },
+  },
+  steps = {
+    start = {
+      next = "none",
+      execute = function (event, transition)
+        local device = event:get_subject ()
+        local profile = event:get_data ("selected-profile")
+        local dev_name = device.properties ["device.name"] or ""
+
+        if not profile then
+          log:info (device, "No profile found to set on " .. dev_name)
+          transition:advance ()
+          return
+        end
+
+        for p in device:iterate_params ("Profile") do
+          local active_profile = cutils.parseParam (p, "Profile")
+          if active_profile.index == tonumber(profile.index) then
+            log:info (device, "Profile " .. profile.name .. " is already set on " .. dev_name)
+            transition:advance ()
+            return
+          end
+        end
+
+        local param = Pod.Object {
+          "Spa:Pod:Object:Param:Profile", "Profile",
+          index = tonumber(profile.index),
+        }
+        log:info (device, "Setting profile " .. profile.name .. " on " .. dev_name)
+        device:set_param ("Profile", param)
+
+        -- FIXME: add cancellability
+        -- sync on the pipewire connection to ensure that the param
+        -- has been configured on the remote device object
+        Core.sync (function ()
+          transition:advance ()
+        end)
+      end
+    },
+  }
+}:register()