plugins/libra2evt.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
  23 #include <gdk/gdk.h>
  24 #include <gtk/gtk.h>
  25 #include <glib.h>
  26
  27 #include "global.h"
  28 #include "generator.h"
  29 #include "comp.h"
  30 #include "control.h"
  31 #include "gencomp.h"
  32
  33 #define SIG_INPUT       0
  34 #define EVT_TRIGGER     0
  35 #define EVT_OUTPUT      0
  36
  37 PRIVATE void evt_trigger_handler(Generator *g, AEvent *event) {
  38   SAMPLE *buffer;
  39   SAMPLETIME now = event->time;
  40
  41   int len = gen_get_randomaccess_input_range( g, SIG_INPUT, 0 );
  42
  43
  44   if( len != 0 ) {
  45       buffer = g_alloca( sizeof( SAMPLE ) * len );
  46
  47       if (!gen_read_randomaccess_input(g, SIG_INPUT, 0, 0, buffer, len))
  48           g_warning( "Error\n" );
  49
  50       gen_init_aevent(event, AE_NUMARRAY, NULL, 0, NULL, 0, now);
  51       event->d.array.len = len;
  52       event->d.array.numbers = buffer;
  53       gen_send_events(g, EVT_OUTPUT, -1, event);
  54       event->kind = AE_NUMBER;
  55   }
  56 }
  57
  58
  59 PRIVATE gboolean init_instance(Generator *g) {
  60   return TRUE;
  61 }
  62
  63 PRIVATE void done_instance(Generator *g) {
  64 }
  65
  66 PRIVATE InputSignalDescriptor input_sigs[] = {
  67   { "Input", SIG_FLAG_RANDOMACCESS },
  68   { NULL, }
  69 };
  70
  71 PRIVATE void setup_class(void) {
  72   GeneratorClass *k = gen_new_generatorclass("ra2evt", FALSE, 1, 1,
  73                                              input_sigs, NULL, NULL,
  74                                              init_instance, done_instance,
  75                                              (AGenerator_pickle_t) init_instance, NULL);
  76
  77   gen_configure_event_input(k, EVT_TRIGGER, "Trigger", evt_trigger_handler);
  78   gen_configure_event_output(k, EVT_OUTPUT, "Output");
  79
  80   gencomp_register_generatorclass(k, FALSE, "Misc/Randomacces-to-event Converter", NULL, NULL);
  81 }
  82
  83 PUBLIC void init_plugin(void) {
  84   setup_class();
  85 }