src/calf/plugin_tools.h

   1 /* Calf DSP plugin pack
   2  * Tools to use in 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_PLUGIN_TOOLS_H
  22 #define CALF_PLUGIN_TOOLS_H
  23
  24 #include <config.h>
  25
  26 #include "giface.h"
  27 #include "vumeter.h"
  28
  29 namespace calf_plugins {
  30
  31 class vumeters
  32 {
  33 public:
  34     struct meter_data
  35     {
  36         int level_idx;
  37         int clip_idx;
  38         dsp::vumeter meter;
  39     };
  40
  41     std::vector<meter_data> meters;
  42     float *const *params;
  43
  44     void init(float *const *prms, int *lvls, int *clps, int length, uint32_t srate) {
  45         meters.resize(length);
  46         for (int i = 0; i < length; i++) {
  47             meter_data &md = meters[i];
  48             md.level_idx = lvls[i];
  49             md.clip_idx = clps[i];
  50             md.meter.set_reverse(lvls[i] < -1);
  51             md.meter.set_falloff(1.f, srate);
  52         }
  53         params = prms;
  54     }
  55     void process(float *values) {
  56         for (size_t i = 0; i < meters.size(); ++i) {
  57             meter_data &md = meters[i];
  58             if ((md.level_idx != -1 && params[(int)fabs(md.level_idx)] != NULL) ||
  59                 (md.clip_idx != -1 && params[(int)fabs(md.clip_idx)] != NULL))
  60             {
  61                 md.meter.process(values[i]);
  62                 if (md.level_idx != -1 && params[(int)fabs(md.level_idx)])
  63                     *params[(int)fabs(md.level_idx)] = md.meter.level;
  64                 if (md.clip_idx != -1 && params[(int)fabs(md.clip_idx)])
  65                     *params[(int)fabs(md.clip_idx)] = md.meter.clip > 0 ? 1.f : 0.f;
  66             }
  67         }
  68     }
  69     void fall(unsigned int numsamples) {
  70         for (size_t i = 0; i < meters.size(); ++i)
  71             if (meters[i].level_idx != -1)
  72                 meters[i].meter.fall(numsamples);
  73     }
  74 };
  75
  76 struct debug_send_configure_iface: public send_configure_iface
  77 {
  78     void send_configure(const char *key, const char *value)
  79     {
  80         printf("send_configure key=%s value=%s\n", key, value);
  81     }
  82 };
  83
  84 };
  85
  86 #endif