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: / usr / share / wireplumber / scripts / linking /

Filename : find-user-target.lua.example

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-- WirePlumber
--
-- Copyright © 2022 Collabora Ltd.
--
-- SPDX-License-Identifier: MIT
--
-- example of a user injectible hook to link a node to a custom target

lutils = require ("linking-utils")
log = Log.open_topic ("s-linking")

SimpleEventHook {
  name = "linking/sample-find-user-target",
  before = "linking/find-defined-target",
  interests = {
    EventInterest {
      Constraint { "event.type", "=", "select-target" },
    },
  },
  execute = function (event)
    local source, om, si, si_props, si_flags, target =
        lutils:unwrap_select_target_event (event)

    -- bypass the hook if the target is already picked up
    if target then
      return
    end

    log:info (si, "in find-user-target")

    -- implement logic here to find a suitable target

    -- store the found target on the event,
    -- the next hooks will take care of linking
    event:set_data ("target", target)
  end
}:register ()