rtbuf/rtbuf/rtbuf_reverb_fdn4.c

• Show log

  Commit

• Hash : dec49556
  Author : Thomas de Grivel
  Date : 2020-04-01T16:26:48
  

  WIP reverb library with feedback delay networks
  

Download

• rtbuf_reverb_fdn4.c

• /*
   * Copyright 2020 Thomas de Grivel <thoxdg@gmail.com>
   *
   * Permission to use, copy, modify, and distribute this software for any
   * purpose with or without fee is hereby granted, provided that the above
   * copyright notice and this permission notice appear in all copies.
   *
   * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
   * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   */
  
  #include <math.h>
  #include <stdio.h>
  #include <strings.h>
  #include "hadamard.h"
  #include "rtbuf.h"
  #include "rtbuf_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;
  }
  

Download