src/calf/modules_dist.h

   1 /* Calf DSP plugin pack
   2  * Distortion related plugins
   3  *
   4  * Copyright (C) 2001-2010 Krzysztof Foltman, Markus Schmidt, Thor Harald Johansen and others
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General
  17  * Public License along with this program; if not, write to the
  18  * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  19  * Boston, MA 02111-1307, USA.
  20  */
  21 #ifndef CALF_MODULES_DIST_H
  22 #define CALF_MODULES_DIST_H
  23
  24 #include <assert.h>
  25 #include <limits.h>
  26 #include "biquad.h"
  27 #include "bypass.h"
  28 #include "audio_fx.h"
  29 #include "giface.h"
  30 #include "metadata.h"
  31 #include "plugin_tools.h"
  32
  33 namespace calf_plugins {
  34
  35 /**********************************************************************
  36  * SATURATOR by Markus Schmidt
  37 **********************************************************************/
  38
  39 class saturator_audio_module: public audio_module<saturator_metadata> {
  40 private:
  41     float hp_pre_freq_old, lp_pre_freq_old;
  42     float hp_post_freq_old, lp_post_freq_old;
  43     float p_level_old, p_freq_old, p_q_old;
  44     float meter_drive;
  45     dsp::biquad_d2 lp[2][4], hp[2][4];
  46     dsp::biquad_d2 p[2];
  47     dsp::tap_distortion dist[2];
  48     dsp::bypass bypass;
  49     vumeters meters;
  50 public:
  51     uint32_t srate;
  52     bool is_active;
  53     saturator_audio_module();
  54     void activate();
  55     void deactivate();
  56     void params_changed();
  57     void set_sample_rate(uint32_t sr);
  58     uint32_t process(uint32_t offset, uint32_t numsamples, uint32_t inputs_mask, uint32_t outputs_mask);
  59 };
  60
  61 /**********************************************************************
  62  * EXCITER by Markus Schmidt
  63 **********************************************************************/
  64
  65 class exciter_audio_module: public audio_module<exciter_metadata> {
  66 private:
  67     float freq_old, ceil_old;
  68     bool ceil_active_old;
  69     float meter_drive;
  70     dsp::biquad_d2 hp[2][4];
  71     dsp::biquad_d2 lp[2][2];
  72     dsp::tap_distortion dist[2];
  73     dsp::bypass bypass;
  74     vumeters meters;
  75 public:
  76     uint32_t srate;
  77     bool is_active;
  78     exciter_audio_module();
  79     void activate();
  80     void deactivate();
  81     void params_changed();
  82     void set_sample_rate(uint32_t sr);
  83     uint32_t process(uint32_t offset, uint32_t numsamples, uint32_t inputs_mask, uint32_t outputs_mask);
  84 };
  85
  86 /**********************************************************************
  87  * BASS ENHANCER by Markus Schmidt
  88 **********************************************************************/
  89
  90 class bassenhancer_audio_module: public audio_module<bassenhancer_metadata> {
  91 private:
  92     float freq_old, floor_old;
  93     bool floor_active_old;
  94     float meter_drive;
  95     dsp::biquad_d2 lp[2][4];
  96     dsp::biquad_d2 hp[2][2];
  97     dsp::tap_distortion dist[2];
  98     dsp::bypass bypass;
  99     vumeters meters;
 100 public:
 101     uint32_t srate;
 102     bool is_active;
 103     bassenhancer_audio_module();
 104     void activate();
 105     void deactivate();
 106     void params_changed();
 107     void set_sample_rate(uint32_t sr);
 108     uint32_t process(uint32_t offset, uint32_t numsamples, uint32_t inputs_mask, uint32_t outputs_mask);
 109 };
 110
 111 /**********************************************************************
 112  * TAPESIMULATOR by Markus Schmidt
 113 **********************************************************************/
 114
 115 class tapesimulator_audio_module:
 116     public audio_module<tapesimulator_metadata>, public frequency_response_line_graph
 117 {
 118     typedef tapesimulator_audio_module AM;
 119     bool active;
 120     uint32_t clip_inL, clip_inR, clip_outL, clip_outR;
 121     float meter_inL, meter_inR, meter_outL, meter_outR;
 122     bool mech_old;
 123     dsp::biquad_d2 lp[2][2];
 124     dsp::biquad_d2 noisefilters[2][3];
 125     dsp::transients transients;
 126     dsp::bypass bypass;
 127     vumeters meters;
 128     const static int channels = 2;
 129     dsp::simple_lfo lfo1, lfo2;
 130     float lp_old;
 131     mutable float rms, input;
 132 public:
 133     uint32_t srate;
 134     tapesimulator_audio_module();
 135     void params_changed();
 136     void activate();
 137     void set_sample_rate(uint32_t sr);
 138     void deactivate();
 139     float freq_gain(int index, double freq) const;
 140     uint32_t process(uint32_t offset, uint32_t numsamples, uint32_t inputs_mask, uint32_t outputs_mask);
 141     bool get_graph(int index, int subindex, int phase, float *data, int points, cairo_iface *context, int *mode) const;
 142     bool get_dot(int index, int subindex, int phase, float &x, float &y, int &size, cairo_iface *context) const;
 143     bool get_gridline(int index, int subindex, int phase, float &pos, bool &vertical, std::string &legend, cairo_iface *context) const;
 144     bool get_layers(int index, int generation, unsigned int &layers) const;
 145 };
 146
 147 /**********************************************************************
 148  * CRUSHER by Markus Schmidt and Christian Holschuh
 149 **********************************************************************/
 150
 151 class crusher_audio_module:
 152     public audio_module<crusher_metadata>, public line_graph_iface
 153 {
 154 private:
 155     vumeters meters;
 156     dsp::bitreduction bitreduction;
 157     dsp::samplereduction samplereduction[2];
 158     dsp::simple_lfo lfo;
 159     dsp::bypass bypass;
 160     float smin, sdiff;
 161 public:
 162     uint32_t srate;
 163     crusher_audio_module();
 164     void set_sample_rate(uint32_t sr);
 165     void activate();
 166     void deactivate();
 167     void params_changed();
 168     uint32_t process(uint32_t offset, uint32_t numsamples, uint32_t inputs_mask, uint32_t outputs_mask);
 169     bool get_graph(int index, int subindex, int phase, float *data, int points, cairo_iface *context, int *mode) const;
 170     bool get_layers(int index, int generation, unsigned int &layers) const;
 171     bool get_gridline(int index, int subindex, int phase, float &pos, bool &vertical, std::string &legend, cairo_iface *context) const;
 172 };
 173
 174 };
 175
 176 #endif