75 lines
2.0 KiB
Lua
75 lines
2.0 KiB
Lua
-- WirePlumber
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--
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-- Copyright © 2021 Collabora Ltd.
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-- @author Julian Bouzas <julian.bouzas@collabora.com>
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--
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-- SPDX-License-Identifier: MIT
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cutils = require ("common-utils")
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log = Log.open_topic ("s-monitors")
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defaults = {}
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defaults.node_properties = { -- Midi bridge node properties
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["factory.name"] = "api.alsa.seq.bridge",
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-- Name set for the node with ALSA MIDI ports
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["node.name"] = "Midi-Bridge",
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-- Set priorities so that it can be used as a fallback driver (see pipewire#3562)
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["priority.session"] = "100",
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["priority.driver"] = "1",
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}
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config = {}
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config.monitoring = Core.test_feature ("monitor.alsa-midi.monitoring")
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config.node_properties = Conf.get_section_as_properties (
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"monitor.alsa-midi.properties", defaults.node_properties)
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SND_PATH = "/dev/snd"
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SEQ_NAME = "seq"
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SND_SEQ_PATH = SND_PATH .. "/" .. SEQ_NAME
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midi_node = nil
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fm_plugin = nil
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function CreateMidiNode ()
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-- create the midi node
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local node = Node("spa-node-factory", config.node_properties)
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node:activate(Feature.Proxy.BOUND, function (n)
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log:info ("activated Midi bridge")
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end)
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return node;
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end
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if GLib.access (SND_SEQ_PATH, "rw") then
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midi_node = CreateMidiNode ()
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elseif config.monitoring then
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fm_plugin = Plugin.find("file-monitor-api")
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end
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-- Only monitor the MIDI device if file does not exist and plugin API is loaded
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if midi_node == nil and fm_plugin ~= nil then
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-- listen for changed events
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fm_plugin:connect ("changed", function (o, file, old, evtype)
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-- files attributes changed
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if evtype == "attribute-changed" then
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if file ~= SND_SEQ_PATH then
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return
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end
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if midi_node == nil and GLib.access (SND_SEQ_PATH, "rw") then
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midi_node = CreateMidiNode ()
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fm_plugin:call ("remove-watch", SND_PATH)
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end
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end
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-- directory is going to be unmounted
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if evtype == "pre-unmount" then
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fm_plugin:call ("remove-watch", SND_PATH)
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end
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end)
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-- add watch
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fm_plugin:call ("add-watch", SND_PATH, "m")
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end
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