libcamera/monitors: rebase libcamera monitor into a bunch of hooks

src/scripts/monitors/libcamera/enumerate-device.lua

@@ -0,0 +1,32 @@
+-- WirePlumber
+--
+-- Copyright © 2023 Collabora Ltd.
+--    @author Ashok Sidipotu <ashok.sidipotu@collabora.com>
+--
+-- SPDX-License-Identifier: MIT
+log = Log.open_topic ("s-monitors-libcam")
+
+local defaults = {}
+defaults.properties = Json.Object {}
+
+local config = {}
+config.properties = Conf.get_section (
+  "monitor.libcamera.properties", defaults.properties):parse ()
+
+function createCamDevice (parent, id, type, factory, properties)
+  source = source or Plugin.find ("standard-event-source")
+
+  local e = source:call ("create-event", "create-libcam-device", parent, properties)
+  e:set_data ("factory", factory)
+  e:set_data ("device-sub-id", id)
+
+  EventDispatcher.push_event (e)
+end
+
+monitor = SpaDevice ("api.libcamera.enum.manager", config.properties)
+if monitor then
+  monitor:connect ("create-object", createCamDevice)
+  monitor:activate (Feature.SpaDevice.ENABLED)
+else
+  log:notice ("PipeWire's libcamera SPA missing or broken. libcamera not supported.")
+end