Adding lots of cool stuff to dotfiles

.config/wireplumber/scripts/intended-roles.lua

@@ -0,0 +1,74 @@
+-- WirePlumber
+--
+-- Copyright © 2021 Asymptotic
+--    @author Arun Raghavan <arun@asymptotic.io>
+--
+-- SPDX-License-Identifier: MIT
+--
+-- Route streams of a given role (media.role property) to devices that are
+-- intended for that role (device.intended-roles property)
+
+metadata_om = ObjectManager {
+  Interest {
+    type = "metadata",
+    Constraint { "metadata.name", "=", "default" },
+  }
+}
+
+devices_om = ObjectManager {
+  Interest {
+    type = "node",
+    Constraint { "media.class", "matches", "Audio/*", type = "pw-global" },
+    Constraint { "device.intended-roles", "is-present", type = "pw" },
+  }
+}
+
+streams_om = ObjectManager {
+  Interest {
+    type = "node",
+    Constraint { "media.class", "matches", "Stream/*/Audio", type = "pw-global" },
+    Constraint { "media.role", "is-present", type = "pw-global" }
+  }
+}
+
+local function routeUsingIntendedRole(stream, dev)
+  local stream_role = stream.properties["media.role"]
+  local is_input = stream.properties["media.class"]:find("Input") ~= nil
+
+  local is_source = dev.properties["media.class"]:find("Source") ~= nil
+  local dev_roles = dev.properties["device.intended-roles"]
+
+  -- Make sure the stream and device direction match
+  if is_input ~= is_source then
+    return
+  end
+
+  for role in dev_roles:gmatch("(%a+)") do
+    if role == stream_role then
+      Log.info(stream,
+        string.format("Routing stream '%s' (%d) with role '%s' to '%s' (%d)",
+          stream.properties["node.name"], stream["bound-id"], stream_role,
+          dev.properties["node.name"], dev["bound-id"])
+      )
+
+      local metadata = metadata_om:lookup()
+      metadata:set(stream["bound-id"], "target.node", "Spa:Id", dev["bound-id"])
+    end
+  end
+end
+
+streams_om:connect("object-added", function (streams_om, stream)
+  for dev in devices_om:iterate() do
+    routeUsingIntendedRole(stream, dev)
+  end
+end)
+
+devices_om:connect("object-added", function (devices_om, dev)
+  for stream in streams_om:iterate() do
+    routeUsingIntendedRole(stream, dev)
+  end
+end)
+
+metadata_om:activate()
+devices_om:activate()
+streams_om:activate()