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Add a bypass/enable port to a-HP/LP

This commit is contained in:
Robin Gareus 2020-05-29 17:29:10 +02:00
parent 2beae94a5d
commit 1ee2d57d49
Signed by: rgareus
GPG Key ID: A090BCE02CF57F04
1 changed files with 18 additions and 4 deletions
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22
share/scripts/HiAndLowPass.lua
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@ -42,6 +42,7 @@ function dsp_params ()
},
{ ["type"] = "input", name = "Low Pass Cut off frequency", min = 20, max = 20000, default = 18000, unit="Hz", logarithmic = true },
{ ["type"] = "input", name = "Low Pass Resonance", min = 0.1, max = 6, default = .707, logarithmic = true },
{ ["type"] = "input", name = "Enable", min = 0, max = 1, default = 1, bypass = true, toggled = true },
}
end
@ -136,7 +137,7 @@ end
-- helper functions for parameter interpolation
function param_changed (ctrl)
for p = 1,6 do
for p = 1,7 do
if ctrl[p] ~= cur[p] then
return true
end
@ -158,11 +159,19 @@ function apply_params (ctrl)
return
end
local ho = ctrl[1]
local lo = ctrl[4]
if ctrl[7] <= 0 then -- when disabled
ho = 0;
lo = 0;
end
-- low-pass filter ctrl parameter values, smooth transition
cur[1] = low_pass_filter_param (cur[1], ctrl[1], 0.05) -- HP order x-fade
cur[1] = low_pass_filter_param (cur[1], ho, 0.05) -- HP order x-fade
cur[2] = low_pass_filter_param (cur[2], ctrl[2], 1.0) -- HP freq/Hz
cur[3] = low_pass_filter_param (cur[3], ctrl[3], 0.01) -- HP quality
cur[4] = low_pass_filter_param (cur[4], ctrl[4], 0.05) -- LP order x-fade
cur[4] = low_pass_filter_param (cur[4], lo, 0.05) -- LP order x-fade
cur[5] = low_pass_filter_param (cur[5], ctrl[5], 1.0) -- LP freq/Hz
cur[6] = low_pass_filter_param (cur[6], ctrl[6], 0.01) -- LP quality
@ -332,7 +341,7 @@ function render_inline (ctx, w, max_h)
local ctrl = santize_params (CtrlPorts:array ())
-- set filter coefficients if they have changed
if param_changed (ctrl) then
for k = 1,6 do cur[k] = ctrl[k] end
for k = 1,7 do cur[k] = ctrl[k] end
filt['hp']:compute (ARDOUR.DSP.BiquadType.HighPass, cur[2], cur[3], 0)
filt['lp']:compute (ARDOUR.DSP.BiquadType.LowPass, cur[5], cur[6], 0)
end
@ -376,6 +385,11 @@ function render_inline (ctx, w, max_h)
local ho = math.floor(cur[1])
local lo = math.floor(cur[4])
if cur[7] <= 0 then
ho = 0;
lo = 0;
end
ctx:set_source_rgba (.8, .8, .8, 1.0)
ctx:move_to (-.5, db_to_y (response(ho, lo, freq_at_x (0, w)), h))
for x = 1,w do