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/* rtbuf
 * Copyright 2018-2023 kmx.io <contact@kmx.io>
 *
 * Permission is hereby granted to use this software excepted
 * on Apple computers granted the above copyright notice and
 * this permission paragraph are included in all copies and
 * substantial portions of this software.
 *
 * THIS SOFTWARE IS PROVIDED "AS-IS" WITHOUT ANY GUARANTEE OF
 * PURPOSE AND PERFORMANCE. IN NO EVENT WHATSOEVER SHALL THE
 * AUTHOR BE CONSIDERED LIABLE FOR THE USE AND PERFORMANCE OF
 * THIS SOFTWARE.
 */
#include <math.h>
#include <stdio.h>
#include <strings.h>
#include "hadamard.h"
#include "../../librtbuf/rtbuf.h"
#include "../reverb.h"

int rtbuf_reverb_fdn4_start (s_rtbuf *rtb)
{
  s_rtbuf_reverb_fdn4_data *data;
  assert(rtb->proc->out_bytes == sizeof(*data));
  data = (s_rtbuf_reverb_fdn4_data*) rtb->data;
  bzero(data, sizeof(*data));
  return 0;
}

int rtbuf_reverb_fdn4 (s_rtbuf *rtb)
{
  s_rtbuf_signal_fun signal;
  s_rtbuf_signal_fun time;
  s_rtbuf_signal_fun dry_level;
  s_rtbuf_signal_fun wet_level;
  s_rtbuf_reverb_fdn4_data *data;
  unsigned int i = 0;
  rtbuf_signal_fun(rtb, RTBUF_REVERB_FDN4_IN_SIGNAL, &signal);
  rtbuf_signal_fun(rtb, RTBUF_REVERB_FDN4_IN_TIME, &time);
  rtbuf_signal_fun(rtb, RTBUF_REVERB_FDN4_IN_DRY_LEVEL, &dry_level);
  rtbuf_signal_fun(rtb, RTBUF_REVERB_FDN4_IN_WET_LEVEL, &wet_level);
  data = (s_rtbuf_reverb_fdn4_data*) rtb->data;
  while (i < RTBUF_SIGNAL_SAMPLES) {
    const double x = signal.sample_fun(signal.signal, i);
    const double t = max(0.0, time.sample_fun(time.signal, i));
    const double dl = dry_level.sample_fun(dry_level.signal, i);
    const double wl = wet_level.sample_fun(wet_level.signal, i);
    const double r = 0.0 * t;
    data->signal[i] = dl * x + wl * r;
    i++;
  }
  return 0;
}
rtbuf/rtbuf/lib/reverb/fdn4.c

Commit

lib/reverb/fdn4.c
