dev
Holger Wirtz 5 years ago
parent b3c69d620b
commit 52d5d52662
  1. 25
      effect_modulated_delay.cpp

@ -107,6 +107,7 @@ void AudioEffectModulatedDelay::update(void)
if (block && modulation)
{
int16_t *bp;
int16_t cb_mod_index_neighbor;
float *mp;
float mod_index;
float mod_number;
@ -130,11 +131,31 @@ void AudioEffectModulatedDelay::update(void)
mod_fraction = modff(mod_index, &mod_number); // split float of mod_index into integer (= mod_number) and fraction part
// calculate modulation index into circular buffer
cb_mod_index = (_cb_index - (_delay_offset + int(mod_index))) % _delay_length;
cb_mod_index = (_cb_index - (_delay_offset + int(mod_index)));
if (cb_mod_index >= _delay_length)
cb_mod_index -= _delay_length;
if (cb_mod_index < 0) // check for negative offsets and correct them
cb_mod_index += _delay_length;
*bp = round(float(_delayline[cb_mod_index]) * mod_fraction + float(_delayline[cb_mod_index + 1]) * (1.0 - mod_fraction));
if (*mp < 0.0)
{
if (cb_mod_index == 0)
cb_mod_index_neighbor = _delay_length;
else
cb_mod_index_neighbor = cb_mod_index - 1;
}
else
{
if (cb_mod_index == _delay_length)
cb_mod_index_neighbor = 0;
else
cb_mod_index_neighbor = cb_mod_index + 1;
}
if (*mp < 0.0)
*bp = round(float(_delayline[cb_mod_index]) * mod_fraction + float(_delayline[cb_mod_index_neighbor]) * (1.0 - mod_fraction));
else
*bp = round(float(_delayline[cb_mod_index_neighbor]) * mod_fraction + float(_delayline[cb_mod_index]) * (1.0 - mod_fraction));
// push the pointers forward
bp++; // next audio data

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