wireplumber script

90-adjust-priority.lua

-- WirePlumber
--
-- Copyright © 2022 Collabora Ltd.
--
-- SPDX-License-Identifier: MIT
--
-- Find the best profile for a device based on profile priorities and
-- availability

cutils = require("common-utils")
log = Log.open_topic("custom-profile")

SimpleEventHook {
  name = "device/find-custom-best-profile",
  after = "device/find-preferred-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 profile is already selected
    if selected_profile then
      return
    end

    local device = event:get_subject()
    local dev_name = device.properties["device.name"] or ""
    local off_profile = nil
    local best_profile = nil
    local unk_profile = nil
    -- Takes absolute priority if available or unknown
    local profile_prop = device.properties["device.profile"]

    local skip_headphone_profile = false
    for r in device:iterate_params("EnumRoute") do
      local route = cutils.parseParam(r, "EnumRoute")
      if route.name == "[Out] Headphones" and route.available == "no" then
        skip_headphone_profile = true
        break
      end
    end


    for p in device:iterate_params("EnumProfile") do
      profile = cutils.parseParam(p, "EnumProfile")
      if profile and profile.name == profile_prop and profile.available ~= "no" then
        selected_profile = profile
        goto profile_set
      elseif profile and profile.name ~= "pro-audio" then
        if profile.name == "off" then
          off_profile = profile
        elseif profile.available == "yes" then
          if string.find(profile.name, "Headphones") and skip_headphone_profile then
            profile.priority = profile.priority - 200
          end
          if best_profile == nil or profile.priority > best_profile.priority then
            best_profile = profile
          end
        elseif profile.available ~= "no" then
          if unk_profile == nil or profile.priority > unk_profile.priority then
            unk_profile = profile
          end
        end
      end
    end

    if best_profile ~= nil then
      selected_profile = best_profile
    elseif unk_profile ~= nil then
      selected_profile = unk_profile
    elseif off_profile ~= nil then
      selected_profile = off_profile
    end

    ::profile_set::
    if selected_profile then
      log:info(device, string.format(
        "Found custom best profile '%s' (%d) for device '%s'",
        selected_profile.name, selected_profile.index, dev_name))
      event:set_data("selected-profile", selected_profile)
    end
  end
}:register()