57 lines
1.5 KiB
Lua
57 lines
1.5 KiB
Lua
|
ardour { ["type"] = "Snippet", name = "fader automation" }
|
||
|
|
|
||
|
|
function factory () return function ()
|
||
|
|
local playhead = Session:transport_frame ()
|
||
|
|
local samplerate = Session:nominal_frame_rate ()
|
||
|
|
|
||
|
|
-- get selected tracks
|
||
|
|
rl = Editor:get_selection().tracks:routelist()
|
||
|
|
-- prepare undo operation
|
||
|
|
Session:begin_reversible_command ("Fancy Fade Out")
|
||
|
|
local add_undo = false -- keep track if something has changed
|
||
|
|
-- iterate over selected tracks
|
||
|
|
for r in rl:iter() do
|
||
|
|
local ac = r:amp():gain_control() -- ARDOUR:AutomationControl
|
||
|
|
local acl = ac:alist() -- ARDOUR:AutomationControlList (state, high-level)
|
||
|
|
local cl = acl:list() -- Evoral:ControlList (actual events)
|
||
|
|
|
||
|
|
ac:set_automation_state(ARDOUR.AutoState.Touch)
|
||
|
|
|
||
|
|
if cl:isnil() then
|
||
|
|
goto out
|
||
|
|
end
|
||
|
|
|
||
|
|
-- query the value at the playhead position
|
||
|
|
local g = cl:eval(playhead)
|
||
|
|
|
||
|
|
-- get state for undo
|
||
|
|
local before = acl:get_state()
|
||
|
|
|
||
|
|
-- delete all events after the playhead...
|
||
|
|
cl:truncate_end (playhead)
|
||
|
|
-- ...and generate some new ones.
|
||
|
|
for i=0,50 do
|
||
|
|
cl:add (playhead + i * samplerate / 50,
|
||
|
|
g * (1 - math.sqrt (i / 50)),
|
||
|
|
false, true)
|
||
|
|
end
|
||
|
|
-- remove dense events
|
||
|
|
cl:thin(20)
|
||
|
|
|
||
|
|
-- save undo
|
||
|
|
local after = acl:get_state()
|
||
|
|
Session:add_command (acl:memento_command(before, after))
|
||
|
|
add_undo = true
|
||
|
|
|
||
|
|
::out::
|
||
|
|
end
|
||
|
|
|
||
|
|
-- all done, commit the combined Undo Operation
|
||
|
|
if add_undo then
|
||
|
|
-- the 'nil' Commend here mean to use the collected diffs added above
|
||
|
|
Session:commit_reversible_command (nil)
|
||
|
|
else
|
||
|
|
Session:abort_reversible_command ()
|
||
|
|
end
|
||
|
|
end end
|