60 lines
1.6 KiB
Lua
60 lines
1.6 KiB
Lua
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ardour {
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["type"] = "dsp",
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name = "a-Mute",
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category = "Amplifier",
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license = "MIT",
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author = "Ardour Team",
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description = [[Auotomatable Mute/Gate]]
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}
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function dsp_ioconfig ()
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-- -1, -1 = any number of channels as long as input and output count matches
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return { { audio_in = -1, audio_out = -1} }
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end
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function dsp_params ()
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return { { ["type"] = "input", name = "Mute", min = 0, max = 1, default = 0, toggled = true } }
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end
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local sr = 48000
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local cur_gain = 0.0
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function dsp_init (rate)
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sr = rate
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end
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function dsp_configure (ins, outs)
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n_out = outs
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n_audio = outs:n_audio ()
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n_midi = outs:n_midi ()
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assert (n_midi == 0)
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end
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-- the DSP callback function
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function dsp_runmap (bufs, in_map, out_map, n_samples, offset)
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local ctrl = CtrlPorts:array() -- get control port array
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local target_gain = ctrl[1] > 0 and 0.0 or 1.0; -- when muted, target_gain = 0.0; otherwise use 1.0
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-- apply I/O map
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ARDOUR.DSP.process_map (bufs, n_out, in_map, out_map, n_samples, offset)
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local g = cur_gain
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for c = 1, n_audio do
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local ob = out_map:get (ARDOUR.DataType ("audio"), c - 1); -- get id of mapped output buffer for given cannel
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if (ob ~= ARDOUR.ChanMapping.Invalid) then
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cur_gain = ARDOUR.Amp.apply_gain (bufs:get_audio(ob), sr, n_samples, g, target_gain, offset)
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end
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end
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-- This plugin doesn't allow MIDI I/O, but it could:
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--[[
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if (target_gain == 0) then
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for c = 1, n_midi do
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local ob = out_map:get (ARDOUR.DataType ("midi"), c - 1);
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if (ob ~= ARDOUR.ChanMapping.Invalid) then
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bufs:get_midi(ob):silence (n_samples, offset)
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end
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end
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end
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--]]
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end
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