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Make makeup_gain smoothening of a-expander same as in a-comp

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This commit is contained in:
Johannes Mueller 2018-06-09 18:50:43 +02:00
parent 4b37e248e1
commit 65fed2fa89
1 changed files with 17 additions and 6 deletions
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23
libs/plugins/a-exp.lv2/a-exp.c
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@ -43,6 +43,11 @@
#define isfinite_local isfinite
#endif
#ifndef FLT_EPSILON
# define FLT_EPSILON 1.192093e-07
#endif
typedef enum {
AEXP_ATTACK = 0,
AEXP_RELEASE,
@ -87,7 +92,6 @@ typedef struct {
float srate;
float makeup_gain;
float tau;
bool was_disabled;
@ -132,7 +136,6 @@ instantiate(const LV2_Descriptor* descriptor,
}
aexp->srate = rate;
aexp->tau = (1.0 - exp (-2.f * M_PI * 25.f / aexp->srate));
#ifdef LV2_EXTENDED
aexp->need_expose = true;
aexp->v_lvl_out = -70.f;
@ -306,7 +309,7 @@ run_mono(LV2_Handle instance, uint32_t n_samples)
float makeup_target = from_dB(makeup);
float makeup_gain = aexp->makeup_gain;
const float tau = aexp->tau;
const float tau = (1.0 - exp (-2.f * M_PI * 25.f / aexp->srate));
if (*aexp->enable <= 0) {
ratio = 1.f;
@ -395,12 +398,16 @@ run_mono(LV2_Handle instance, uint32_t n_samples)
lgaininp = in0 * Lgain;
makeup_gain += tau * (makeup_target - makeup_gain) + 1e-12;
makeup_gain += tau * (makeup_target - makeup_gain);
output[i] = lgaininp * makeup_gain;
max = (fabsf(output[i]) > max) ? fabsf(output[i]) : sanitize_denormal(max);
}
if (fabsf(tau * (makeup_gain - makeup_target)) < FLT_EPSILON*makeup_gain) {
makeup_gain = makeup_target;
}
*(aexp->outlevel) = (max < 0.0056f) ? -45.f : to_dB(max);
*(aexp->inlevel) = in_peak_db;
aexp->makeup_gain = makeup_gain;
@ -476,7 +483,7 @@ run_stereo(LV2_Handle instance, uint32_t n_samples)
float makeup_target = from_dB(makeup);
float makeup_gain = aexp->makeup_gain;
const float tau = aexp->tau;
const float tau = (1.0 - exp (-2.f * M_PI * 25.f / aexp->srate));
if (*aexp->enable <= 0) {
ratio = 1.f;
@ -569,7 +576,7 @@ run_stereo(LV2_Handle instance, uint32_t n_samples)
lgaininp = in0 * Lgain;
rgaininp = in1 * Lgain;
makeup_gain += tau * (makeup_target - makeup_gain) + 1e-12;
makeup_gain += tau * (makeup_target - makeup_gain);
output0[i] = lgaininp * makeup_gain;
output1[i] = rgaininp * makeup_gain;
@ -577,6 +584,10 @@ run_stereo(LV2_Handle instance, uint32_t n_samples)
max = (fmaxf(fabs(output0[i]), fabs(output1[i])) > max) ? fmaxf(fabs(output0[i]), fabs(output1[i])) : sanitize_denormal(max);
}
if (fabsf(tau * (makeup_gain - makeup_target)) < FLT_EPSILON*makeup_gain) {
makeup_gain = makeup_target;
}
*(aexp->outlevel) = (max < 0.0056f) ? -45.f : to_dB(max);
*(aexp->inlevel) = in_peak_db;
aexp->makeup_gain = makeup_gain;