plugins/libTEMPLATE.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 /* Template gAlan plugin file. Please distribute your plugins according to
  20    the GNU General Public License! (You don't have to, but I'd prefer it.) */
  21
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <stdio.h>
  25 #include <stddef.h>
  26
  27 #include <gdk/gdk.h>
  28 #include <gtk/gtk.h>
  29 #include <gmodule.h>
  30
  31 #include "global.h"
  32 #include "generator.h"
  33 #include "comp.h"
  34 #include "control.h"
  35 #include "gencomp.h"
  36
  37 #define GENERATOR_CLASS_NAME    "template"
  38 #define GENERATOR_CLASS_PATH    "Misc/Template Plugin"
  39 #define GENERATOR_CLASS_PIXMAP  "template.xpm"
  40
  41 #define SIG_INPUT               0
  42 #define SIG_OUTPUT              0
  43
  44 #define EVT_INPUT               0
  45 #define NUM_EVENT_INPUTS        1
  46
  47 #define EVT_OUTPUT              0
  48 #define NUM_EVENT_OUTPUTS       1
  49
  50 typedef struct Data {
  51   int dummy;
  52 } Data;
  53
  54 PRIVATE void setup_tables(void) {
  55   /* Put any plugin-wide initialisation here. */
  56 }
  57
  58 PRIVATE gboolean init_instance(Generator *g) {
  59   Data *data = safe_malloc(sizeof(Data));
  60   g->data = data;
  61
  62   data->dummy = 0;
  63
  64   return TRUE;
  65 }
  66
  67 PRIVATE void destroy_instance(Generator *g) {
  68   free(g->data);
  69 }
  70
  71 PRIVATE void unpickle_instance(Generator *g, ObjectStoreItem *item, ObjectStore *db) {
  72   Data *data = safe_malloc(sizeof(Data));
  73   g->data = data;
  74
  75   data->dummy = objectstore_item_get_integer(item, "TEMPLATE_dummy", 123456);
  76 }
  77
  78 PRIVATE void pickle_instance(Generator *g, ObjectStoreItem *item, ObjectStore *db) {
  79   Data *data = g->data;
  80   objectstore_item_set_integer(item, "TEMPLATE_dummy", data->dummy);
  81 }
  82
  83 PRIVATE gboolean output_generator(Generator *g, SAMPLE *buf, int buflen) {
  84   Data *data = g->data;
  85
  86   memset(buf, 0, buflen * sizeof(SAMPLE));
  87   return FALSE;
  88 }
  89
  90 PRIVATE void evt_input_handler(Generator *g, AEvent *event) {
  91   /* handle incoming events on queue EVT_INPUT */
  92 }
  93
  94 PRIVATE InputSignalDescriptor input_sigs[] = {
  95   { "Input", SIG_FLAG_REALTIME },
  96   { NULL, }
  97 };
  98
  99 PRIVATE OutputSignalDescriptor output_sigs[] = {
 100   { "Output", SIG_FLAG_REALTIME, { output_generator, } },
 101   { NULL, }
 102 };
 103
 104 PRIVATE ControlDescriptor controls[] = {
 105   /* { kind, name, min,max,step,page, size,editable, is_dst,queue_number,
 106        init,destroy,refresh,refresh_data }, */
 107   { CONTROL_KIND_NONE, }
 108 };
 109
 110 PRIVATE void setup_class(void) {
 111   GeneratorClass *k = gen_new_generatorclass(GENERATOR_CLASS_NAME, FALSE,
 112                                              NUM_EVENT_INPUTS, NUM_EVENT_OUTPUTS,
 113                                              input_sigs, output_sigs, controls,
 114                                              init_instance, destroy_instance,
 115                                              unpickle_instance, pickle_instance);
 116
 117   gen_configure_event_input(k, EVT_INPUT, "Input", evt_input_handler);
 118   gen_configure_event_output(k, EVT_OUTPUT, "Output");
 119
 120   gencomp_register_generatorclass(k, FALSE, GENERATOR_CLASS_PATH,
 121                                   PIXMAPDIRIFY(GENERATOR_CLASS_PIXMAP),
 122                                   NULL);
 123 }
 124
 125 PUBLIC void init_plugin(void) {
 126   setup_tables();
 127   setup_class();
 128 }