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ardour {
["type"] = "session",
name = "Stop at Marker",
license = "MIT",
author = "Ardour Lua Task Force",
description = [[An example session script which stops the transport on every location marker when rolling forward.]]
}
function factory ()
return function (n_samples)
if (not Session:transport_rolling ()) then
-- not rolling, nothing to do.
return
end
local pos = Session:transport_frame () -- current playhead position
local loc = Session:locations () -- all marker locations
-- find first marker after the current playhead position, ignore loop + punch ranges
-- (this only works when rolling forward, to extend this example see
-- http://manual.ardour.org/lua-scripting/class_reference/#ARDOUR:Locations )
local m = loc:first_mark_after (pos, false)
if (m == -1) then
-- no marker was found
return
end
-- since ardour may split the process cycle for events,
-- n_samples may be smaller.
local blk = Session:get_block_size ()
-- transport stop can only happen on a process-cycle boundary.
-- This callback happens from within the process callback,
-- so we need to queue it ahead of time.
if (pos + n_samples + blk >= m and pos + n_samples < m) then
Session:request_transport_speed (0.0, true)
end
end
end
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