rtbuf/rtbuf/rtbuf_reverb.h

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

  WIP reverb library with feedback delay networks
  

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• rtbuf_reverb.h

• /*
   * 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.
   */
  #ifndef RTBUF_REVERB_H
  #define RTBUF_REVERB_H
  
  #include <assert.h>
  #include "rtbuf.h"
  #include "rtbuf_signal.h"
  
  /* Feedback delay network with fourth order Hadamard matrix */
  
  #define RTBUF_REVERB_FDN4_DELAY_SAMPLES_MAX \
    RTBUF_SIGNAL_SAMPLERATE
  
  #pragma pack(push,1)
  typedef struct rtbuf_reverb_fdn4_data {
          t_rtbuf_signal signal;
          t_rtbuf_signal_sample d0[RTBUF_REVERB_FDN4_DELAY_SAMPLES_MAX];
          t_rtbuf_signal_sample d1[RTBUF_REVERB_FDN4_DELAY_SAMPLES_MAX];
          t_rtbuf_signal_sample d2[RTBUF_REVERB_FDN4_DELAY_SAMPLES_MAX];
          t_rtbuf_signal_sample d3[RTBUF_REVERB_FDN4_DELAY_SAMPLES_MAX];
          unsigned int pos;
  } s_rtbuf_reverb_fdn4_data;
  #pragma pack(pop)
  
  enum {
          RTBUF_REVERB_FDN4_IN_SIGNAL = 0,
          RTBUF_REVERB_FDN4_IN_TIME,
          RTBUF_REVERB_FDN4_IN_DRY_LEVEL,
          RTBUF_REVERB_FDN4_IN_WET_LEVEL,
          RTBUF_REVERB_FDN4_INS
  };
  
  int rtbuf_reverb_fdn4 (s_rtbuf *rtb);
  int rtbuf_reverb_fdn4_start (s_rtbuf *rtb);
  
  #endif /* RTBUF_REVERB_H */
  

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