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/* gAlan - Graphical Audio Language
* Copyright (C) 1999 Tony Garnock-Jones
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <stddef.h>
#include <gdk/gdk.h>
#include <gtk/gtk.h>
#include <gmodule.h>
#include "global.h"
#include "generator.h"
#include "comp.h"
#include "control.h"
#include "gencomp.h"
#define GENERATOR_CLASS_NAME "filter_diff"
#define GENERATOR_CLASS_PATH "Filter/Differentiator Coeffs"
#define EVT_TYPE 0
#define NUM_EVENT_INPUTS 1
#define EVT_COEFFS 0
#define NUM_EVENT_OUTPUTS 1
typedef struct Data {
} Data;
#define NUM_COEFFS 4
/**
* \brief Calculate the coefficients for a normal Integrator
* And emit them.
*
* \param g The Generator we send from.
* \param event The event we received.
*
* The intgrator has its coefficients [1,1,1,0]
*
* That the event is passed here is only for convenience.
* i change the type of the event from AE_NUMBER to AE_NUMARRAY
* this makes eventq_free() believe it must free the number array also
* so i change the type back to AE_NONE...
*
* This is to remove the segfault for now.
* but i dont know how i should handle this in the future.
*/
PRIVATE void calc_coeffs_and_send(Generator *g, AEvent *event) {
gdouble coeffs[NUM_COEFFS] = { 1,0,1,-1 };
gen_init_aevent(event, AE_DBLARRAY, NULL, 0, NULL, 0, event->time);
event->d.darray.len = NUM_COEFFS;
event->d.darray.numbers = coeffs;
gen_send_events(g, EVT_COEFFS, -1, event);
event->kind = AE_NONE;
}
PRIVATE ControlDescriptor controls[] = {
/* { kind, name, min,max,step,page, size,editable, is_dst,queue_number,
init,destroy,refresh,refresh_data }, */
// { CONTROL_KIND_KNOB, "bias", -1,1,0.1,0.01, 0,TRUE, TRUE,EVT_ADDEND,
// NULL,NULL, control_double_updater, (gpointer) offsetof(Data, addend) },
{ CONTROL_KIND_NONE, }
};
PRIVATE void setup_class(void) {
GeneratorClass *k = gen_new_generatorclass(GENERATOR_CLASS_NAME, FALSE,
NUM_EVENT_INPUTS, NUM_EVENT_OUTPUTS,
NULL, NULL, controls,
NULL, NULL, NULL, NULL);
gen_configure_event_input(k, EVT_TYPE, "Type", calc_coeffs_and_send);
gen_configure_event_output(k, EVT_COEFFS, "Coefficients");
gencomp_register_generatorclass(k, FALSE, GENERATOR_CLASS_PATH,
NULL,
NULL);
}
PUBLIC void init_plugin_diff(void) {
setup_class();
}
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