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Better version of 1ee2d57d49 (a hi/lo bypass)

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This commit is contained in:
Robin Gareus 2020-05-29 19:55:30 +02:00
parent 1edc9c5845
commit 9b9128f917
Signed by: rgareus
GPG Key ID: A090BCE02CF57F04
1 changed files with 22 additions and 17 deletions
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39
share/scripts/HiAndLowPass.lua
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@ -50,7 +50,7 @@ end
local hp = {} -- the biquad high-pass filter instances (DSP)
local lp = {} -- the biquad high-pass filter instances (DSP)
local filt = nil -- the biquad filter instance (GUI, response)
local cur = {0, 0, 0, 0, 0, 0} -- current parameters
local cur = {0, 0, 0, 0, 0, 0, 1} -- current parameters
local lpf = 0.03 -- parameter low-pass filter time-constant
local chn = 0 -- channel/filter count
local lpf_chunk = 0 -- chunk size for audio processing when interpolating parameters
@ -132,6 +132,12 @@ function santize_params (ctrl)
-- low pass, clamp range
ctrl[5] = math.min (max_freq, math.max (20, ctrl[5]))
ctrl[6] = math.min (6, math.max (0.1, ctrl[6]))
if ctrl[7] <= 0 then -- when disabled
ctrl[1] = 0;
ctrl[4] = 0;
end
return ctrl
end
@ -159,21 +165,14 @@ 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], ho, 0.05) -- HP order x-fade
cur[1] = low_pass_filter_param (cur[1], ctrl[1], 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], lo, 0.05) -- LP order x-fade
cur[4] = low_pass_filter_param (cur[4], ctrl[4], 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
cur[7] = ctrl[7]
for c = 1, chn do
for k = 1,4 do
@ -202,6 +201,18 @@ function dsp_run (ins, outs, n_samples)
siz = lpf_chunk
end
if changed == false and cur[1] == 0 and cur[4] == 0 then
-- fully bypassed
for c = 1, #ins do
if ins[c] ~= outs[c] then
ARDOUR.DSP.copy_vector (outs[c]:offset (0), ins[c]:offset (0), n_samples)
end
end
-- nothing left to do
n_samples = 0
end
-- process all channels
while n_samples > 0 do
if changed then apply_params (ctrl) end
if siz > n_samples then siz = n_samples end
@ -209,7 +220,6 @@ function dsp_run (ins, outs, n_samples)
local ho = math.floor(cur[1])
local lo = math.floor(cur[4])
-- process all channels
for c = 1, #ins do
-- High Pass
@ -385,11 +395,6 @@ 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