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Add ACE Stereo Routing

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This commit is contained in:
Robin Gareus 2023-07-06 00:27:30 +02:00
parent 2a1d4ffce9
commit e23cfe2942
Signed by: rgareus
GPG Key ID: A090BCE02CF57F04
1 changed files with 107 additions and 0 deletions
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share/scripts/a_stereo_routing.lua Normal file
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ardour {
["type"] = "dsp",
name = "ACE Stereo Routing",
category = "Utility",
license = "MIT",
author = "Ardour Community",
description = [[Stereo Signal Routing, re-assign or mix channels. This is a drop-in replacement for https://x42-plugins.com/x42/x42-stereoroute]]
}
function dsp_ioconfig ()
return { { audio_in = 2, audio_out = 2} }
end
function dsp_params ()
return {
{ ["type"] = "input", name = "Mode", min = 0, max = 8, default = 0, enum = true, scalepoints =
{
["No-OP: L->L, R->R (Straight Bypass)"] = 0,
["Downmix to Mono -3dB (Equal Power)"] = 1,
["Downmix to Mono -6dB (Equal Amplitude)"] = 2,
["Downmix to Mono -0dB (Sum Channels)"] = 3,
["Route Left Only: L->L, L->R"] = 4,
["Route Right Only: R->R, R->L"] = 5,
["Swap Channels: L->R, R->L"] = 6,
["M/S: (L+R)/2, (L-R)/2 (to Mid/Side)"] = 7,
["M/S: (L+R), (L-R) (from Mid/Side)"] = 8,
}
}
}
end
function dsp_init (rate)
cmem = ARDOUR.DSP.DspShm (8192)
end
function copy_no_inplace (ins, outs, n_samples)
assert (#ins == #outs)
for c = 1, #outs do
if ins[c] ~= outs[c] then
ARDOUR.DSP.copy_vector (outs[c], ins[c], n_samples) -- ..copy data from input to output.
end
end
end
function dsp_run (ins, outs, n_samples)
assert (n_samples <= 8192)
local ctrl = CtrlPorts:array()
local m = ctrl[1]
if (m < 1) then
-- NO-OP
copy_no_inplace (ins, outs, n_samples)
elseif (m < 2) then
-- Sum to Mono -3dB
copy_no_inplace (ins, outs, n_samples)
ARDOUR.DSP.mix_buffers_no_gain (outs[1], outs[2], n_samples)
ARDOUR.DSP.apply_gain_to_buffer (outs[1], n_samples, 0.707945784);
ARDOUR.DSP.copy_vector (outs[2], outs[1], n_samples)
elseif (m < 3) then
-- Sum to Mono -6dB
copy_no_inplace (ins, outs, n_samples)
ARDOUR.DSP.mix_buffers_no_gain (outs[1], outs[2], n_samples)
ARDOUR.DSP.apply_gain_to_buffer (outs[1], n_samples, 0.5);
ARDOUR.DSP.copy_vector (outs[2], outs[1], n_samples)
elseif (m < 4) then
-- Sum to Mono
copy_no_inplace (ins, outs, n_samples)
ARDOUR.DSP.mix_buffers_no_gain (outs[1], outs[2], n_samples)
ARDOUR.DSP.copy_vector (outs[2], outs[1], n_samples)
elseif (m < 5) then
-- Left only
if ins[1] ~= outs[1] then
ARDOUR.DSP.copy_vector (outs[1], ins[1], n_samples)
end
ARDOUR.DSP.copy_vector (outs[2], outs[1], n_samples)
elseif (m < 6) then
-- Right only
if ins[2] ~= outs[2] then
ARDOUR.DSP.copy_vector (outs[2], ins[2], n_samples)
end
ARDOUR.DSP.copy_vector (outs[1], outs[2], n_samples)
elseif (m < 7) then
-- Swap channels
ARDOUR.DSP.copy_vector (cmem:to_float(0), ins[1], n_samples)
ARDOUR.DSP.copy_vector (outs[1], ins[2], n_samples)
ARDOUR.DSP.copy_vector (outs[2], cmem:to_float(0), n_samples)
elseif (m < 8) then
-- to Mid/Side
ARDOUR.DSP.copy_vector (cmem:to_float(0), ins[1], n_samples)
ARDOUR.DSP.mix_buffers_with_gain (cmem:to_float(0), ins[2], n_samples, -1) -- (L - R)
if ins[1] ~= outs[1] then
ARDOUR.DSP.copy_vector (outs[1], ins[1], n_samples)
end
ARDOUR.DSP.mix_buffers_no_gain (outs[1], ins[2], n_samples) -- (L + R)
ARDOUR.DSP.copy_vector (outs[2], cmem:to_float(0), n_samples)
ARDOUR.DSP.apply_gain_to_buffer (outs[1], n_samples, 0.5);
ARDOUR.DSP.apply_gain_to_buffer (outs[2], n_samples, 0.5);
else
-- from Mid/Side
ARDOUR.DSP.copy_vector (cmem:to_float(0), ins[1], n_samples)
ARDOUR.DSP.mix_buffers_with_gain (cmem:to_float(0), ins[2], n_samples, -1) -- (L - R)
if ins[1] ~= outs[1] then
ARDOUR.DSP.copy_vector (outs[1], ins[1], n_samples)
end
ARDOUR.DSP.mix_buffers_no_gain (outs[1], ins[2], n_samples) -- (L + R)
ARDOUR.DSP.copy_vector (outs[2], cmem:to_float(0), n_samples)
end
end