43aa2d4952
Since all scripts run in a sandbox with their own global environment, it means that they don't interfere with each other's global variables. Therefore, all file-wide variables can be declared global without any change in behavior. In my understanding, it is better to do so because this means that any code accessing those variables is going to access them directly from the global environment table with a simple lookup rather than having each variable referenced in the local closure of each function separately.
50 lines
1.3 KiB
Lua
50 lines
1.3 KiB
Lua
-- WirePlumber
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--
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-- Copyright © 2023 Collabora Ltd.
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-- @author Ashok Sidipotu <ashok.sidipotu@collabora.com>
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--
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-- SPDX-License-Identifier: MIT
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mutils = require ("monitor-utils")
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log = Log.open_topic ("s-monitors-v4l2")
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SimpleEventHook {
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name = "monitor/v4l2/name-device",
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interests = {
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EventInterest {
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Constraint { "event.type", "=", "create-v4l2-device" },
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},
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},
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execute = function(event)
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local properties = event:get_data ("device-properties")
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local parent = event:get_subject ()
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local id = event:get_data ("device-sub-id")
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local name = "v4l2_device." ..
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(properties["device.name"] or
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properties["device.bus-id"] or
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properties["device.bus-path"] or
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tostring (id)):gsub ("([^%w_%-%.])", "_")
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properties["device.name"] = name
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-- deduplicate devices with the same name
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for counter = 2, 99, 1 do
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if mutils.find_duplicate (parent, id, "device.name", properties["node.name"]) then
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properties["device.name"] = name .. "." .. counter
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else
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break
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end
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end
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-- ensure the device has a description
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properties["device.description"] =
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properties["device.description"]
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or properties["device.product.name"]
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or "Unknown device"
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event:set_data ("device-properties", properties)
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end
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}:register ()
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