function dsp_params ()
return
{
+ { ["type"] = "input", name = "Enable", min = 0, max = 1, default = 1, bypass = true, toggled = true },
{ ["type"] = "input", name = "Type", min = 0, max = 4, default = 0, enum = true, scalepoints =
{
["Peaking"] = 0,
end
end
+function ctrl_data ()
+ local ctrl = CtrlPorts:array ()
+ if ctrl[1] <= 0 then -- when disabled
+ ctrl[3] = 0; -- force gain to 0dB
+ end
+ return ctrl
+end
+
-- these globals are *not* shared between DSP and UI
local filters = {} -- the biquad filter instances (DSP)
local filt -- the biquad filter instance (GUI, response)
-local cur = {0, 0, 0, 0} -- current parameters
+local cur = {0, 0, 0, 0, 0} -- current parameters
local lpf = 0.03 -- parameter low-pass filter time-constant
local chn = 0 -- channel/filter count
for c = 1, chn do
filters[c] = ARDOUR.DSP.Biquad (rate) -- initialize filters
end
- cur = {0, 0, 0, 0}
+ cur = {0, 0, 0, 0, 0}
end
-- helper functions for parameter interpolation
function param_changed (ctrl)
- if ctrl[1] == cur[1] and ctrl[2] == cur[2] and ctrl[3] == cur[3] and ctrl[4] == cur[4] then
+ if ctrl[2] == cur[2] and ctrl[3] == cur[3] and ctrl[4] == cur[4] and ctrl[5] == cur[5] then
return false
end
return true
return
end
- if cur[1] ~= ctrl[1] then
+ if cur[2] ~= ctrl[2] then
-- reset filter state when type changes
filt:reset ()
- for k = 1,4 do cur[k] = ctrl[k] end
+ for k = 2,5 do cur[k] = ctrl[k] end
else
-- low-pass filter ctrl parameter values, smooth transition
- cur[2] = low_pass_filter_param (cur[2], ctrl[2], 0.1) -- gain/dB
- cur[3] = low_pass_filter_param (cur[3], ctrl[3], 1.0) -- freq/Hz
- cur[4] = low_pass_filter_param (cur[4], ctrl[4], 0.01) -- quality
+ cur[3] = low_pass_filter_param (cur[3], ctrl[3], 0.1) -- gain/dB
+ cur[4] = low_pass_filter_param (cur[4], ctrl[4], 1.0) -- freq/Hz
+ cur[5] = low_pass_filter_param (cur[5], ctrl[5], 0.01) -- quality
end
for c = 1, chn do
- filters[c]:compute (map_type (cur[1]), cur[3], cur[4], cur[2])
+ filters[c]:compute (map_type (cur[2]), cur[4], cur[5], cur[3])
end
end
local changed = false
local siz = n_samples
local off = 0
+ local ctrl = ctrl_data ()
-- if a parameter was changed, process at most 64 samples at a time
-- and interpolate parameters until the current settings match
-- the target values
- if param_changed (CtrlPorts:array ()) then
+ if param_changed (ctrl) then
changed = true
siz = 64
end
while n_samples > 0 do
- if changed then apply_params (CtrlPorts:array ()) end
+ if changed then apply_params (ctrl) end
if siz > n_samples then siz = n_samples end
-- process all channels
-- set filter coefficients if they have changed
if param_changed (CtrlPorts:array ()) then
- local ctrl = CtrlPorts:array ()
- for k = 1,4 do cur[k] = ctrl[k] end
- filt:compute (map_type (cur[1]), cur[3], cur[4], cur[2])
+ local ctrl = ctrl_data ()
+ for k = 2,5 do cur[k] = ctrl[k] end
+ filt:compute (map_type (cur[2]), cur[4], cur[5], cur[3])
end
-- calc height of inline display