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small improvement for limitSampleDynamics

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support the case when only attackTime XOR decayTime is defined
This commit is contained in:
Frank 2022-08-14 14:38:27 +02:00
parent 72770e5809
commit 8acb44b202
1 changed files with 12 additions and 9 deletions
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21
usermods/audioreactive/audio_reactive.h
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@ -683,21 +683,24 @@ class AudioReactive : public Usermod {
// effects: Gravimeter, Gravcenter, Gravcentric, Noisefire, Plasmoid, Freqpixels, Freqwave, Gravfreq, (2D Swirl, 2D Waverly)
void limitSampleDynamics(void) {
#ifdef SOUND_DYNAMICS_LIMITER
const float bigChange = 196; // just a representative number - a large, expected sample value
const float bigChange = 196; // just a representative number - a large, expected sample value
static unsigned long last_time = 0;
static float last_volumeSmth = 0.0f;
if ((attackTime > 0) && (decayTime > 0)) { // only change volume if user has defined attack>0 and decay>0
long delta_time = millis() - last_time;
delta_time = constrain(delta_time , 1, 1000); // below 1ms -> 1ms; above 1sec -> sily lil hick-up
float maxAttack = bigChange * float(delta_time) / float(attackTime);
float maxDecay = - bigChange * float(delta_time) / float(decayTime);
long delta_time = millis() - last_time;
delta_time = constrain(delta_time , 1, 1000); // below 1ms -> 1ms; above 1sec -> sily lil hick-up
float deltaSample = volumeSmth - last_volumeSmth;
float deltaSample = volumeSmth - last_volumeSmth;
if (attackTime > 0) { // user has defined attack time > 0
float maxAttack = bigChange * float(delta_time) / float(attackTime);
if (deltaSample > maxAttack) deltaSample = maxAttack;
if (deltaSample < maxDecay) deltaSample = maxDecay;
volumeSmth = last_volumeSmth + deltaSample;
}
if (decayTime > 0) { // user has defined decay time > 0
float maxDecay = - bigChange * float(delta_time) / float(decayTime);
if (deltaSample < maxDecay) deltaSample = maxDecay;
}
volumeSmth = last_volumeSmth + deltaSample;
last_volumeSmth = volumeSmth;
last_time = millis();