Update

pipewire/.config/wireplumber/scripts/device/find-preferred-profile.lua

@@ -0,0 +1,68 @@
+-- WirePlumber
+--
+-- Copyright © 2024 Collabora Ltd.
+--
+-- SPDX-License-Identifier: MIT
+--
+-- Finds the user preferred profile for a device, based on the priorities
+-- defined in the "device.profile.priority.rules" section of the configuration.
+
+cutils = require ("common-utils")
+log = Log.open_topic ("s-device")
+
+config = {}
+config.rules = Conf.get_section_as_json ("device.profile.priority.rules", Json.Array {})
+
+SimpleEventHook {
+  name = "device/find-preferred-profile",
+  after = "device/find-stored-profile",
+  before = "device/find-best-profile",
+  interests = {
+    EventInterest {
+      Constraint { "event.type", "=", "select-profile" },
+    },
+  },
+  execute = function (event)
+    local selected_profile = event:get_data ("selected-profile")
+
+    -- skip hook if the profile is already selected for this device.
+    if selected_profile then
+      return
+    end
+
+    local device = event:get_subject ()
+    local props = JsonUtils.match_rules_update_properties (
+        config.rules, device.properties)
+    local p_array = props["priorities"]
+
+    -- skip hook if the profile priorities are NOT defined for this device.
+    if not p_array then
+      return nil
+    end
+
+    local p_json = Json.Raw(p_array)
+    local priorities = p_json:parse()
+
+    for _, priority_profile in ipairs(priorities) do
+      for p in device:iterate_params("EnumProfile") do
+        local device_profile = cutils.parseParam(p, "EnumProfile")
+        if device_profile and device_profile.name == priority_profile then
+          selected_profile = device_profile
+          goto profile_set
+        end
+      end
+    end
+
+::profile_set::
+    if selected_profile then
+      log:info (device, string.format (
+        "Found preferred profile '%s' (%d) for device '%s'",
+        selected_profile.name, selected_profile.index, device_name))
+      event:set_data ("selected-profile", selected_profile)
+    else
+      log:info (device, "Profiles listed in 'device.profile.priority.rules'"
+        .. " do not match the available ones of device: " .. device_name)
+    end
+
+  end
+}:register()