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ardour { ["type"] = "Snippet", name = "Set Region Fades" }
function factory () return function ()
-- ensure sure that fades are used and visible
-- (Session > Properties > Fades)
assert (Session:cfg():get_use_region_fades())
assert (Session:cfg():get_show_region_fades())
-- get Editor selection
-- http://manual.ardour.org/lua-scripting/class_reference/#ArdourUI:Editor
-- http://manual.ardour.org/lua-scripting/class_reference/#ArdourUI:Selection
local sel = Editor:get_selection ()
-- query the session's currane sample-rate
local sr = Session:nominal_sample_rate ()
-- iterate over Regions that part of the selection
-- http://manual.ardour.org/lua-scripting/class_reference/#ArdourUI:RegionSelection
for r in sel.regions:regionlist ():iter () do
-- each of the items 'r' is-a
-- http://manual.ardour.org/lua-scripting/class_reference/#ARDOUR:Region
-- test if it is an audio region
local ar = r:to_audioregion ()
if ar:isnil () then goto next end
-- fade in/out for 500 msec, or half the region-length, whatever is shorter
local fadelen = .5 * sr
if fadelen > r:length () / 2 then
fadelen = r:length () / 2
end
-- https://manual.ardour.org/lua-scripting/class_reference/#ARDOUR.FadeShape
ar:set_fade_in_shape (ARDOUR.FadeShape.FadeConstantPower)
ar:set_fade_in_length (fadelen)
ar:set_fade_in_active (true)
ar:set_fade_out_shape (ARDOUR.FadeShape.FadeConstantPower)
ar:set_fade_out_length (fadelen)
ar:set_fade_out_active (true)
::next::
end
end end
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