update lua-biquad: add en/disable
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@ -21,6 +21,7 @@ end
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function dsp_params ()
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return
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{
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{ ["type"] = "input", name = "Enable", min = 0, max = 1, default = 1, bypass = true, toggled = true },
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{ ["type"] = "input", name = "Type", min = 0, max = 4, default = 0, enum = true, scalepoints =
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{
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["Peaking"] = 0,
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@ -52,10 +53,18 @@ function map_type (t)
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end
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end
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function ctrl_data ()
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local ctrl = CtrlPorts:array ()
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if ctrl[1] <= 0 then -- when disabled
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ctrl[3] = 0; -- force gain to 0dB
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end
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return ctrl
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end
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-- these globals are *not* shared between DSP and UI
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local filters = {} -- the biquad filter instances (DSP)
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local filt -- the biquad filter instance (GUI, response)
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local cur = {0, 0, 0, 0} -- current parameters
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local cur = {0, 0, 0, 0, 0} -- current parameters
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local lpf = 0.03 -- parameter low-pass filter time-constant
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local chn = 0 -- channel/filter count
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@ -76,12 +85,12 @@ function dsp_configure (ins, outs)
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for c = 1, chn do
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filters[c] = ARDOUR.DSP.Biquad (rate) -- initialize filters
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end
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cur = {0, 0, 0, 0}
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cur = {0, 0, 0, 0, 0}
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end
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-- helper functions for parameter interpolation
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function param_changed (ctrl)
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if ctrl[1] == cur[1] and ctrl[2] == cur[2] and ctrl[3] == cur[3] and ctrl[4] == cur[4] then
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if ctrl[2] == cur[2] and ctrl[3] == cur[3] and ctrl[4] == cur[4] and ctrl[5] == cur[5] then
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return false
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end
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return true
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@ -101,19 +110,19 @@ function apply_params (ctrl)
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return
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end
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if cur[1] ~= ctrl[1] then
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if cur[2] ~= ctrl[2] then
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-- reset filter state when type changes
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filt:reset ()
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for k = 1,4 do cur[k] = ctrl[k] end
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for k = 2,5 do cur[k] = ctrl[k] end
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else
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-- low-pass filter ctrl parameter values, smooth transition
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cur[2] = low_pass_filter_param (cur[2], ctrl[2], 0.1) -- gain/dB
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cur[3] = low_pass_filter_param (cur[3], ctrl[3], 1.0) -- freq/Hz
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cur[4] = low_pass_filter_param (cur[4], ctrl[4], 0.01) -- quality
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cur[3] = low_pass_filter_param (cur[3], ctrl[3], 0.1) -- gain/dB
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cur[4] = low_pass_filter_param (cur[4], ctrl[4], 1.0) -- freq/Hz
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cur[5] = low_pass_filter_param (cur[5], ctrl[5], 0.01) -- quality
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end
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for c = 1, chn do
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filters[c]:compute (map_type (cur[1]), cur[3], cur[4], cur[2])
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filters[c]:compute (map_type (cur[2]), cur[4], cur[5], cur[3])
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end
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end
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@ -123,17 +132,18 @@ function dsp_run (ins, outs, n_samples)
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local changed = false
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local siz = n_samples
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local off = 0
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local ctrl = ctrl_data ()
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-- if a parameter was changed, process at most 64 samples at a time
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-- and interpolate parameters until the current settings match
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-- the target values
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if param_changed (CtrlPorts:array ()) then
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if param_changed (ctrl) then
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changed = true
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siz = 64
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end
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while n_samples > 0 do
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if changed then apply_params (CtrlPorts:array ()) end
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if changed then apply_params (ctrl) end
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if siz > n_samples then siz = n_samples end
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-- process all channels
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@ -212,9 +222,9 @@ function render_inline (ctx, w, max_h)
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-- set filter coefficients if they have changed
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if param_changed (CtrlPorts:array ()) then
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local ctrl = CtrlPorts:array ()
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for k = 1,4 do cur[k] = ctrl[k] end
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filt:compute (map_type (cur[1]), cur[3], cur[4], cur[2])
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local ctrl = ctrl_data ()
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for k = 2,5 do cur[k] = ctrl[k] end
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filt:compute (map_type (cur[2]), cur[4], cur[5], cur[3])
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end
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-- calc height of inline display
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