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rescan: Stop rescan for 2s if BT node is removed

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The intention here is to fix a Bluetooth bug where changing between different
profiles momentarily causes streams to be linked to an internal speaker.
Unfortunately, this case is not handled by the event dispatcher because some
signals are emitted using idle callbacks, and therefore we have to rely on
extra logic in rescan.lua to solve the problem.
This commit is contained in:
Julian Bouzas 2024-06-20 08:42:27 -04:00
parent ff33f38bea
commit afcb91f59b
1 changed files with 60 additions and 1 deletions
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61
src/scripts/linking/rescan.lua
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@ -15,6 +15,8 @@ cutils = require ("common-utils")
futils = require ("filter-utils")
log = Log.open_topic ("s-linking")
handles = {}
handles.rescan_enabled = true
handles.timeout_source = nil
function checkFilter (si, om, handle_nonstreams)
-- always handle filters if handle_nonstreams is true, even if it is disabled
@ -192,8 +194,65 @@ SimpleEventHook {
},
},
execute = function (event)
if handles.rescan_enabled then
local source = event:get_source ()
source:call ("schedule-rescan", "linking")
end
end
}:register ()
SimpleEventHook {
name = "linking/session-item-added",
before = "linking/rescan-trigger",
interests = {
EventInterest {
Constraint { "event.type", "=", "session-item-added" },
},
},
execute = function (event)
-- clear timeout source, if any
if handles.timeout_source ~= nil then
handles.timeout_source:destroy ()
handles.timeout_source = nil
end
-- Always enable rescan when any node is added
handles.rescan_enabled = true
end
}:register ()
-- Stop rescan for 2 seconds if BT item was removed. This avoids audio
-- being played on internal nodes for a few seconds while the BT device is
-- switching profiles.
SimpleEventHook {
name = "linking/bluez-session-item-removed",
before = "linking/rescan-trigger",
interests = {
EventInterest {
Constraint { "event.type", "=", "session-item-removed" },
Constraint { "device.api", "=", "bluez5" },
},
},
execute = function (event)
local si = event:get_subject ()
local si_props = si.properties
local source = event:get_source ()
source:call ("schedule-rescan", "linking")
-- clear timeout source, if any
if handles.timeout_source ~= nil then
handles.timeout_source:destroy ()
handles.timeout_source = nil
end
-- disable rescan
handles.rescan_enabled = false
-- re-enable rescan after 2 seconds
handles.timeout_source = Core.timeout_add (2000, function()
handles.timeout_source = nil
handles.rescan_enabled = true
source:call ("schedule-rescan", "linking")
end)
end
}:register ()