49 lines
1.4 KiB
Lua
49 lines
1.4 KiB
Lua
ardour {
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["type"] = "dsp",
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name = "ACE Gain Ratio",
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category = "Amplifier",
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license = "MIT",
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author = "Ardour Community",
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description = [[Multichannel amplifier with gain coefficient ratio (not dezippered). Beware this plugin allows for significant gain ratios, it's intended to academic purposes.]]
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}
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function dsp_ioconfig ()
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return
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{
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-- -1, -1 = any number of channels as long as input and output count matches
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{ audio_in = -1, audio_out = -1},
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}
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end
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function dsp_params ()
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return
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{
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{ ["type"] = "input", name = "Gain Coefficient numerator", min = 0, max = 1048576, default = 1, unit="", logarithmic = true},
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{ ["type"] = "input", name = "Gain coefficient denominator", min = 1, max = 1048576, default = 1, unit="", logarithmic = true},
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}
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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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end
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function dsp_runmap (bufs, in_map, out_map, n_samples, offset)
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local ctrl = CtrlPorts:array()
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local gain = ctrl[1] / ctrl[2]
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ARDOUR.DSP.process_map (bufs, n_out, in_map, out_map, n_samples, offset)
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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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bufs:get_audio (ob):apply_gain (gain, n_samples);
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end
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end
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end
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