73 lines
1.8 KiB
Lua
73 lines
1.8 KiB
Lua
ardour {
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["type"] = "EditorAction",
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name = "Faders to Trims",
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license = "MIT",
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author = "PSmith",
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description = [[Add 'Trim' plugins to all tracks. Move the fader value into the trim.]]
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}
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function action_params ()
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return
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{
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}
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end
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function factory (params)
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return function ()
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-- loop over all tracks
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for t in Session:get_tracks():iter() do
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fader_value = t:gain_control():get_value()
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if fader_value == 1 then
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goto skip
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end
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if t:gain_control():automation_state() ~= ARDOUR.AutoState.Off then
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goto skip
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end
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-- TODO: skip MIDI tracks without or with a post-fader synth
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-- (fader is MIDI-velocity)
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v = math.log(fader_value, 10)
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trim_gain = 20*v
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fader_pos = 0
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local proc;
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local i = 0;
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repeat
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-- find the fader proc
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proc = t:nth_processor (i)
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if (not proc:isnil() and proc:display_name () == "Fader") then
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fader_pos = i
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end
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i = i + 1
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until proc:isnil()
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-- apply the trim
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trim = t:nth_processor (fader_pos+1)
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if (not trim:isnil() and trim:display_name () == "ACE Amplifier") then
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--existing trim found; sum the trim and the fader gain, and set the trim to that value
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cur_gain = ARDOUR.LuaAPI.get_processor_param (trim, 0)
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ARDOUR.LuaAPI.set_processor_param (trim, 0, trim_gain+cur_gain)
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else
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--create a new Trim processor, and set its value to match the fader
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local a = ARDOUR.LuaAPI.new_luaproc(Session, "ACE Amplifier");
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if (not a:isnil()) then
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t:add_processor_by_index(a, fader_pos-1, nil, true)
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ARDOUR.LuaAPI.set_processor_param (a, 0, trim_gain)
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a = nil -- explicitly drop shared-ptr reference
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end
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end
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--zero the fader gain
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t:gain_control():set_value(1, PBD.GroupControlDisposition.NoGroup)
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::skip::
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end --foreach track
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end --function
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end --factory
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