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New visualization of the compressor state in graph view

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To properly visualize attack and release we calculate the input level out of
the gain reduction the output level threshold and ratio.

if (output_level >= threshold) { // no expansion
        input_level = output_level
} else {
        input_level = (gain_reduction - threshold * (1-ratio)) / ratio
}
This commit is contained in:
Johannes Mueller 2017-08-03 17:10:59 +02:00
parent 48c568187d
commit 2a5d56215c
1 changed files with 8 additions and 47 deletions
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55
libs/plugins/a-exp.lv2/a-exp.c
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@ -82,8 +82,6 @@ typedef struct {
float srate;
float old_in_peak_db;
float makeup_gain;
float tau;
@ -255,7 +253,6 @@ activate(LV2_Handle instance)
*(aexp->gainr) = 160.0f;
*(aexp->outlevel) = -45.0f;
aexp->old_in_peak_db = -160.0f;
}
static void
@ -322,14 +319,12 @@ run_mono(LV2_Handle instance, uint32_t n_samples)
}
#endif
float in_peak = 0.f;
aexp->v_gainr = 0.0;
for (i = 0; i < n_samples; i++) {
in0 = input[i];
sc0 = sc[i];
ingain = usesidechain ? fabs(sc0) : fabs(in0);
in_peak = fmaxf (in_peak, ingain);
Lyg = 0.f;
Lxg = (ingain==0.f) ? -160.f : to_dB(ingain);
Lxg = sanitize_denormal(Lxg);
@ -374,27 +369,11 @@ run_mono(LV2_Handle instance, uint32_t n_samples)
aexp->makeup_gain = makeup_gain;
#ifdef LV2_EXTENDED
float in_peak_db = to_dB(in_peak);
if (!isfinite_local (in_peak_db)) {
in_peak_db = -160.0f;
}
const float tot_rel_c = exp(-1000.f/(*(aexp->release) * srate) * n_samples);
const float tot_atk_c = exp(-1000.f/(*(aexp->attack) * srate) * n_samples);
const float old_in_peak_db = aexp->old_in_peak_db;
if (in_peak_db < old_in_peak_db && in_peak_db < thresdb) {
in_peak_db = tot_rel_c*old_in_peak_db + (1.f-tot_rel_c)*in_peak_db;
} else if (in_peak_db > aexp->old_in_peak_db && in_peak_db > thresdb) {
in_peak_db = tot_atk_c*old_in_peak_db+ (1.f*tot_atk_c)*in_peak_db;
}
aexp->old_in_peak_db = in_peak_db;
const float v_lvl_in = in_peak_db;
const float v_lvl_out = (max < 0.001f) ? -60.f : to_dB(max);
const float v_lvl_in = v_lvl_out > thresdb ?
v_lvl_out :
(aexp->v_lvl_out - thresdb * (1.f-ratio))/ratio;
if (fabsf (aexp->v_lvl_out - v_lvl_out) >= 1 || fabsf (aexp->v_lvl_in - v_lvl_in) >= 1) {
// >= 1dB difference
aexp->need_expose = true;
@ -479,7 +458,6 @@ run_stereo(LV2_Handle instance, uint32_t n_samples)
}
#endif
float in_peak = 0.f;
aexp->v_gainr = 0.0;
for (i = 0; i < n_samples; i++) {
@ -488,7 +466,6 @@ run_stereo(LV2_Handle instance, uint32_t n_samples)
sc0 = sc[i];
maxabslr = fmaxf(fabs(in0), fabs(in1));
ingain = usesidechain ? fabs(sc0) : maxabslr;
in_peak = fmaxf (in_peak, ingain);
Lyg = 0.f;
Lxg = (ingain==0.f) ? -160.f : to_dB(ingain);
Lxg = sanitize_denormal(Lxg);
@ -536,27 +513,11 @@ run_stereo(LV2_Handle instance, uint32_t n_samples)
aexp->makeup_gain = makeup_gain;
#ifdef LV2_EXTENDED
float in_peak_db = to_dB(in_peak);
if (!isfinite_local (in_peak_db)) {
in_peak_db = -160.0f;
}
const float tot_rel_c = exp(-1000.f/(*(aexp->release) * srate) * n_samples);
const float tot_atk_c = exp(-1000.f/(*(aexp->attack) * srate) * n_samples);
const float old_in_peak_db = aexp->old_in_peak_db;
if (in_peak_db < old_in_peak_db && in_peak_db < thresdb) {
in_peak_db = tot_rel_c*old_in_peak_db + (1.f-tot_rel_c)*in_peak_db;
} else if (in_peak_db > aexp->old_in_peak_db && in_peak_db > thresdb) {
in_peak_db = tot_atk_c*old_in_peak_db+ (1.f*tot_atk_c)*in_peak_db;
}
aexp->old_in_peak_db = in_peak_db;
const float v_lvl_in = in_peak_db;
const float v_lvl_out = (max < 0.001f) ? -60.f : to_dB(max);
const float v_lvl_in = v_lvl_out > thresdb ?
v_lvl_out :
(aexp->v_lvl_out - thresdb * (1.f-ratio))/ratio;
if (fabsf (aexp->v_lvl_out - v_lvl_out) >= 1 || fabsf (aexp->v_lvl_in - v_lvl_in) >= 1) {
// >= 1dB difference
aexp->need_expose = true;