nonlib/dsp.h

   1
   2 /*******************************************************************************/
   3 /* Copyright (C) 2008 Jonathan Moore Liles                                     */
   4 /*                                                                             */
   5 /* This program is free software; you can redistribute it and/or modify it     */
   6 /* under the terms of the GNU General Public License as published by the       */
   7 /* Free Software Foundation; either version 2 of the License, or (at your      */
   8 /* option) any later version.                                                  */
   9 /*                                                                             */
  10 /* This program is distributed in the hope that it will be useful, but WITHOUT */
  11 /* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or       */
  12 /* FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for   */
  13 /* more details.                                                               */
  14 /*                                                                             */
  15 /* You should have received a copy of the GNU General Public License along     */
  16 /* with This program; see the file COPYING.  If not,write to the Free Software */
  17 /* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  18 /*******************************************************************************/
  19
  20 #pragma once
  21
  22 #include "JACK/Client.H"
  23 #include <math.h>
  24
  25 void buffer_apply_gain ( sample_t *buf, nframes_t nframes, float g );
  26 void buffer_apply_gain_buffer ( sample_t *buf, const sample_t *gainbuf, nframes_t nframes );
  27 void buffer_copy_and_apply_gain_buffer ( sample_t *dst, const sample_t *src, const sample_t *gainbuf, nframes_t nframes );
  28 void buffer_mix ( sample_t *dst, const sample_t *src, nframes_t nframes );
  29 void buffer_mix_with_gain ( sample_t *dst, const sample_t *src, nframes_t nframes, float g );
  30 void buffer_interleave_one_channel ( sample_t *dst, const sample_t *src, int channel, int channels, nframes_t nframes );
  31 void buffer_interleave_one_channel_and_mix ( sample_t *dst, const sample_t *src, int channel, int channels, nframes_t nframes );
  32 void buffer_deinterleave_one_channel ( sample_t *dst, const sample_t *src, int channel, int channels, nframes_t nframes );
  33 void buffer_fill_with_silence ( sample_t *buf, nframes_t nframes );
  34 bool buffer_is_digital_black ( sample_t *buf, nframes_t nframes );
  35 void buffer_copy ( sample_t *dst, const sample_t *src, nframes_t nframes );
  36 void buffer_copy_and_apply_gain ( sample_t *dst, const sample_t *src, nframes_t nframes, float gain );
  37
  38 // from SWH plugins.
  39 // Convert a value in dB's to a coefficent
  40 #define DB_CO(g) ((g) > -90.0f ? powf(10.0f, (g) * 0.05f) : 0.0f)
  41 #define CO_DB(v) (20.0f * log10f(v))