Moving files:

wireplumber/scripts/node/software-dsp.lua

@@ -0,0 +1,92 @@
+-- WirePlumber
+--
+-- Copyright © 2022-2023 The WirePlumber project contributors
+--    @author Dmitry Sharshakov <d3dx12.xx@gmail.com>
+--
+-- SPDX-License-Identifier: MIT
+
+log = Log.open_topic("s-node")
+
+config = {}
+config.rules = Conf.get_section_as_json("node.software-dsp.rules", Json.Array{})
+
+-- TODO: port from Obj Manager to Hooks
+clients_om = ObjectManager {
+  Interest { type = "client" }
+}
+
+filter_nodes = {}
+hidden_nodes = {}
+
+SimpleEventHook {
+  name = "node/dsp/create-dsp-node",
+  interests = {
+    EventInterest {
+      Constraint  { "event.type", "=", "node-added" },
+    },
+  },
+  execute = function(event)
+    local node = event:get_subject()
+    JsonUtils.match_rules (config.rules, node.properties, function (action, value)
+      if action == "create-filter" then
+        local props = value:parse (1)
+        log:debug("DSP rule found for " .. node.properties["node.name"])
+
+        if props["filter-graph"] then
+          log:debug("Loading filter graph for " .. node.properties["node.name"])
+          filter_nodes[node.id] = LocalModule("libpipewire-module-filter-chain", props["filter-graph"], {})
+        elseif props["filter-path"] then
+          log:debug("Loading filter graph for " .. node.properties["node.name"] .. " from disk")
+          local conf = Conf(props["filter-path"], {
+            ["as-section"] = "node.software-dsp.graph",
+            ["no-fragments"] = true
+          })
+          local err = conf:open()
+          if not err then
+            local args = conf:get_section_as_json("node.software-dsp.graph"):to_string()
+            filter_nodes[node.id] = LocalModule("libpipewire-module-filter-chain", args, {})
+          else
+            log:warning("Unable to load filter graph for " .. node.properties["node.name"])
+          end
+        end
+
+        if props["hide-parent"] then
+          log:debug("Setting permissions to '-' on " .. node.properties["node.name"] .. " for open clients")
+          for client in clients_om:iterate{ type = "client" } do
+            if not client["properties"]["wireplumber.daemon"] then
+              client:update_permissions{ [node["bound-id"]] = "-" }
+            end
+          end
+          hidden_nodes[node["bound-id"]] = node.id
+        end
+      end
+    end)
+  end
+}:register()
+
+SimpleEventHook {
+  name = "node/dsp/free-dsp-node",
+  interests = {
+    EventInterest {
+      Constraint  { "event.type", "=", "node-removed" },
+    },
+  },
+  execute = function(event)
+    local node = event:get_subject()
+    if filter_nodes[node.id] then
+      log:debug("Freeing filter on node " .. node.id)
+      filter_nodes[node.id] = nil
+      hidden_nodes[node["bound-id"]] = nil
+    end
+  end
+}:register()
+
+clients_om:connect("object-added", function (om, client)
+  for id, _ in pairs(hidden_nodes) do
+    if not client["properties"]["wireplumber.daemon"] then
+      client:update_permissions { [id] = "-" }
+    end
+  end
+end)
+
+clients_om:activate()