plugins/libsigsignum.c

   1 /* gAlan - Graphical Audio Language
   2  * Copyright (C) 1999 Tony Garnock-Jones
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19 #include <stdlib.h>
  20 #include <string.h>
  21 #include <stdio.h>
  22 #include <stddef.h>
  23
  24 #include <gdk/gdk.h>
  25 #include <gtk/gtk.h>
  26 #include <gmodule.h>
  27
  28 #include "global.h"
  29 #include "generator.h"
  30 #include "comp.h"
  31 #include "gencomp.h"
  32
  33 PRIVATE gboolean output_generator(Generator *g, SAMPLE *buf, int buflen) {
  34   int i;
  35
  36   if (!gen_read_realtime_input(g, 0, -1, buf, buflen))
  37     return FALSE;
  38
  39   for (i = 0; i < buflen; i++)
  40     buf[i] = buf[i] > 0.0 ? 1.0 : -1.0;
  41
  42   return TRUE;
  43 }
  44
  45 PRIVATE InputSignalDescriptor input_sigs[] = {
  46   { "Input", SIG_FLAG_REALTIME },
  47   { NULL, }
  48 };
  49
  50 PRIVATE OutputSignalDescriptor output_sigs[] = {
  51   { "Output", SIG_FLAG_REALTIME, { output_generator, } },
  52   { NULL, }
  53 };
  54
  55 PRIVATE void setup_class(void) {
  56   GeneratorClass *k = gen_new_generatorclass("sigsignum", FALSE, 0, 0,
  57                                              input_sigs, output_sigs, NULL,
  58                                              NULL, NULL, NULL, NULL);
  59
  60   gencomp_register_generatorclass(k, FALSE, "Levels/Signum", NULL, NULL);
  61 }
  62
  63 PUBLIC void init_plugin(void) {
  64   setup_class();
  65 }