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-- 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()
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