1 files changed, 45 insertions, 0 deletions
diff --git a/meta-pipewire/recipes-multimedia/wireplumber/wireplumber-config-agl/alsa-suspend.lua b/meta-pipewire/recipes-multimedia/wireplumber/wireplumber-config-agl/alsa-suspend.lua
new file mode 100644
index 000000000..55edd12cf
--- /dev/null
+++ b/meta-pipewire/recipes-multimedia/wireplumber/wireplumber-config-agl/alsa-suspend.lua
@@ -0,0 +1,45 @@
+-- WirePlumber
+--
+-- This script mutes all ALSA sinks when the "suspend.playback" metadata
+-- key is set to 1; compliments pipewire-ic-ipc and the respective support
+-- for handling "suspend.playback" in the policy scripts
+--
+-- Copyright © 2021 Collabora Ltd.
+--    @author George Kiagiadakis <george.kiagiadakis@collabora.com>
+--
+-- SPDX-License-Identifier: MIT
+
+mixer_api = Plugin.find("mixer-api")
+
+nodes_om = ObjectManager {
+  Interest { type = "node",
+    Constraint { "media.class", "matches", "Audio/Sink" },
+    Constraint { "object.path", "matches", "alsa:pcm:*" },
+  },
+}
+
+metadata_om = ObjectManager {
+  Interest { type = "metadata",
+    Constraint { "metadata.name", "=", "default" },
+  }
+}
+
+metadata_om:connect("object-added", function (om, metadata)
+  metadata:connect("changed", function (m, subject, key, t, value)
+    if key == "suspend.playback" then
+      local suspended = (value == "1")
+
+      Log.info(string.format("%s ALSA nodes for IC sound",
+                             suspended and "muting" or "unmuting"))
+
+      for n in nodes_om:iterate() do
+        mixer_api:call("set-volume", n["bound-id"], {
+          ["mute"] = suspended,
+        })
+      end
+    end
+  end)
+end)
+
+nodes_om:activate()
+metadata_om:activate()