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ardour {
["type"] = "EditorHook",
name = "Periodically Save Snapshot",
author = "Ardour Lua Task Force",
description = "Save a session-snapshot peridocally (every 15mins) named after the current date-time",
}
-- subscribe to signals
-- http://manual.ardour.org/lua-scripting/class_reference/#LuaSignal.LuaSignal
function signals ()
return LuaSignal.Set():add ({[LuaSignal.LuaTimerS] = true})
end
-- create callback function
function factory ()
local _last_snapshot_time = 0 -- persistent variable
local _snapshot_interval = 60 * 15 -- 15 minutes
-- callback function which invoked when signal is emitted, every 100ms
return function (signal, ref, ...)
local now = os.time (); -- unix-time, seconds since 1970
-- skip initial save when script is loaded
if (_last_snapshot_time == 0) then
_last_snapshot_time = now;
end
-- every 15 mins
if (now > _last_snapshot_time + _snapshot_interval) then
-- don't save while recording, may interfere with recording
if Session:actively_recording() then
-- queue 30 sec after rec-stop
_last_snapshot_time = now - _snapshot_interval + 30
return
end
_last_snapshot_time = now
-- format date-time (avoid colon)
local snapshot_name = os.date ("%Y-%m-%d %H.%M.%S", now)
-- save session -- http://manual.ardour.org/lua-scripting/class_reference/#ARDOUR:Session
Session:save_state ("backup " .. snapshot_name, false, false, false)
end
end
end
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