src/giface.cpp

   1 /* Calf DSP Library
   2  * Module wrapper methods.
   3  *
   4  * Copyright (C) 2001-2007 Krzysztof Foltman
   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., 59 Temple Place, Suite 330,
  19  * Boston, MA 02111-1307, USA.
  20  */
  21 #include <config.h>
  22 #include <assert.h>
  23 #include <memory.h>
  24 #include <calf/giface.h>
  25
  26 using namespace std;
  27 using namespace calf_utils;
  28 using namespace calf_plugins;
  29
  30 float parameter_properties::from_01(double value01) const
  31 {
  32     double value = dsp::clip(value01, 0., 1.);
  33     switch(flags & PF_SCALEMASK)
  34     {
  35     case PF_SCALE_DEFAULT:
  36     case PF_SCALE_LINEAR:
  37     case PF_SCALE_PERC:
  38     default:
  39         value = min + (max - min) * value01;
  40         break;
  41     case PF_SCALE_QUAD:
  42         value = min + (max - min) * value01 * value01;
  43         break;
  44     case PF_SCALE_LOG:
  45         value = min * pow(double(max / min), value01);
  46         break;
  47     case PF_SCALE_GAIN:
  48         if (value01 < 0.00001)
  49             value = min;
  50         else {
  51             float rmin = std::max(1.0f / 1024.0f, min);
  52             value = rmin * pow(double(max / rmin), value01);
  53         }
  54         break;
  55     case PF_SCALE_LOG_INF:
  56         assert(step);
  57         if (value01 > (step - 1.0) / step)
  58             value = FAKE_INFINITY;
  59         else
  60             value = min * pow(double(max / min), value01 * step / (step - 1.0));
  61         break;
  62     }
  63     switch(flags & PF_TYPEMASK)
  64     {
  65     case PF_INT:
  66     case PF_BOOL:
  67     case PF_ENUM:
  68     case PF_ENUM_MULTI:
  69         if (value > 0)
  70             value = (int)(value + 0.5);
  71         else
  72             value = (int)(value - 0.5);
  73         break;
  74     }
  75     return value;
  76 }
  77
  78 double parameter_properties::to_01(float value) const
  79 {
  80     switch(flags & PF_SCALEMASK)
  81     {
  82     case PF_SCALE_DEFAULT:
  83     case PF_SCALE_LINEAR:
  84     case PF_SCALE_PERC:
  85     default:
  86         return double(value - min) / (max - min);
  87     case PF_SCALE_QUAD:
  88         return sqrt(double(value - min) / (max - min));
  89     case PF_SCALE_LOG:
  90         value /= min;
  91         return log((double)value) / log((double)max / min);
  92     case PF_SCALE_LOG_INF:
  93         if (IS_FAKE_INFINITY(value))
  94             return max;
  95         value /= min;
  96         assert(step);
  97         return (step - 1.0) * log((double)value) / (step * log((double)max / min));
  98     case PF_SCALE_GAIN:
  99         if (value < 1.0 / 1024.0) // new bottom limit - 60 dB
 100             return 0;
 101         double rmin = std::max(1.0f / 1024.0f, min);
 102         value /= rmin;
 103         return log((double)value) / log(max / rmin);
 104     }
 105 }
 106
 107 float parameter_properties::get_increment() const
 108 {
 109     float increment = 0.01;
 110     if (step > 1)
 111         increment = 1.0 / (step - 1);
 112     else
 113     if (step > 0 && step < 1)
 114         increment = step;
 115     else
 116     if ((flags & PF_TYPEMASK) != PF_FLOAT)
 117         increment = 1.0 / (max - min);
 118     return increment;
 119 }
 120
 121 int parameter_properties::get_char_count() const
 122 {
 123     if ((flags & PF_SCALEMASK) == PF_SCALE_PERC)
 124         return 6;
 125     if ((flags & PF_SCALEMASK) == PF_SCALE_GAIN) {
 126         char buf[256];
 127         size_t len = 0;
 128         sprintf(buf, "%0.0f dB", 6.0 * log(min) / log(2));
 129         len = strlen(buf);
 130         sprintf(buf, "%0.0f dB", 6.0 * log(max) / log(2));
 131         len = std::max(len, strlen(buf)) + 2;
 132         return (int)len;
 133     }
 134     return std::max(to_string(min).length(), std::max(to_string(max).length(), to_string(min + (max-min) * 0.987654).length()));
 135 }
 136
 137 std::string parameter_properties::to_string(float value) const
 138 {
 139     char buf[32];
 140     if ((flags & PF_SCALEMASK) == PF_SCALE_PERC) {
 141         sprintf(buf, "%0.f%%", 100.0 * value);
 142         return string(buf);
 143     }
 144     if ((flags & PF_SCALEMASK) == PF_SCALE_GAIN) {
 145         if (value < 1.0 / 1024.0) // new bottom limit - 60 dB
 146             return "-inf dB"; // XXXKF change to utf-8 infinity
 147         sprintf(buf, "%0.1f dB", 6.0 * log(value) / log(2));
 148         return string(buf);
 149     }
 150     switch(flags & PF_TYPEMASK)
 151     {
 152     case PF_STRING:
 153         return "N/A";
 154     case PF_INT:
 155     case PF_BOOL:
 156     case PF_ENUM:
 157     case PF_ENUM_MULTI:
 158         value = (int)value;
 159         break;
 160     }
 161
 162     if ((flags & PF_SCALEMASK) == PF_SCALE_LOG_INF && IS_FAKE_INFINITY(value))
 163         sprintf(buf, "+inf"); // XXXKF change to utf-8 infinity
 164     else
 165         sprintf(buf, "%g", value);
 166
 167     switch(flags & PF_UNITMASK) {
 168     case PF_UNIT_DB: return string(buf) + " dB";
 169     case PF_UNIT_HZ: return string(buf) + " Hz";
 170     case PF_UNIT_SEC: return string(buf) + " s";
 171     case PF_UNIT_MSEC: return string(buf) + " ms";
 172     case PF_UNIT_CENTS: return string(buf) + " ct";
 173     case PF_UNIT_SEMITONES: return string(buf) + "#";
 174     case PF_UNIT_BPM: return string(buf) + " bpm";
 175     case PF_UNIT_RPM: return string(buf) + " rpm";
 176     case PF_UNIT_DEG: return string(buf) + " deg";
 177     case PF_UNIT_NOTE:
 178         {
 179             static const char *notes = "C C#D D#E F F#G G#A A#B ";
 180             int note = (int)value;
 181             if (note < 0 || note > 127)
 182                 return "---";
 183             return string(notes + 2 * (note % 12), 2) + i2s(note / 12 - 2);
 184         }
 185     }
 186
 187     return string(buf);
 188 }
 189
 190 void calf_plugins::plugin_ctl_iface::clear_preset() {
 191     int param_count = get_param_count();
 192     for (int i=0; i < param_count; i++)
 193     {
 194         parameter_properties &pp = *get_param_props(i);
 195         if ((pp.flags & PF_TYPEMASK) == PF_STRING)
 196         {
 197             configure(pp.short_name, pp.choices ? pp.choices[0] : "");
 198         }
 199         else
 200             set_param_value(i, pp.def_value);
 201     }
 202 }
 203
 204 const char *calf_plugins::load_gui_xml(const std::string &plugin_id)
 205 {
 206     try {
 207         return strdup(calf_utils::load_file((std::string(PKGLIBDIR) + "/gui-" + plugin_id + ".xml").c_str()).c_str());
 208     }
 209     catch(file_exception e)
 210     {
 211         return NULL;
 212     }
 213 }
 214
 215 bool calf_plugins::check_for_message_context_ports(parameter_properties *parameters, int count)
 216 {
 217     for (int i = count - 1; i >= 0; i--)
 218     {
 219         if (parameters[i].flags & PF_PROP_MSGCONTEXT)
 220             return true;
 221     }
 222     return false;
 223 }
 224
 225 bool calf_plugins::check_for_string_ports(parameter_properties *parameters, int count)
 226 {
 227     for (int i = count - 1; i >= 0; i--)
 228     {
 229         if ((parameters[i].flags & PF_TYPEMASK) == PF_STRING)
 230             return true;
 231         if ((parameters[i].flags & PF_TYPEMASK) < PF_STRING)
 232             return false;
 233     }
 234     return false;
 235 }