1 /* gAlan - Graphical Audio Language
2 * Copyright (C) 1999 Tony Garnock-Jones
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.
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.
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
29 #include "generator.h"
34 #define GENERATOR_CLASS_NAME "filter_diff"
35 #define GENERATOR_CLASS_PATH "Filter/Differentiator Coeffs"
38 #define NUM_EVENT_INPUTS 1
41 #define NUM_EVENT_OUTPUTS 1
51 * \brief Calculate the coefficients for a normal Integrator
54 * \param g The Generator we send from.
55 * \param event The event we received.
57 * The intgrator has its coefficients [1,1,1,0]
59 * That the event is passed here is only for convenience.
60 * i change the type of the event from AE_NUMBER to AE_NUMARRAY
61 * this makes eventq_free() believe it must free the number array also
62 * so i change the type back to AE_NONE...
64 * This is to remove the segfault for now.
65 * but i dont know how i should handle this in the future.
69 PRIVATE
void calc_coeffs_and_send(Generator
*g
, AEvent
*event
) {
70 gdouble coeffs
[NUM_COEFFS
] = { 1,0,1,-1 };
72 gen_init_aevent(event
, AE_DBLARRAY
, NULL
, 0, NULL
, 0, event
->time
);
74 event
->d
.darray
.len
= NUM_COEFFS
;
75 event
->d
.darray
.numbers
= coeffs
;
77 gen_send_events(g
, EVT_COEFFS
, -1, event
);
78 event
->kind
= AE_NONE
;
82 PRIVATE ControlDescriptor controls
[] = {
83 /* { kind, name, min,max,step,page, size,editable, is_dst,queue_number,
84 init,destroy,refresh,refresh_data }, */
85 // { CONTROL_KIND_KNOB, "bias", -1,1,0.1,0.01, 0,TRUE, TRUE,EVT_ADDEND,
86 // NULL,NULL, control_double_updater, (gpointer) offsetof(Data, addend) },
87 { CONTROL_KIND_NONE
, }
90 PRIVATE
void setup_class(void) {
91 GeneratorClass
*k
= gen_new_generatorclass(GENERATOR_CLASS_NAME
, FALSE
,
92 NUM_EVENT_INPUTS
, NUM_EVENT_OUTPUTS
,
94 NULL
, NULL
, NULL
, NULL
);
96 gen_configure_event_input(k
, EVT_TYPE
, "Type", calc_coeffs_and_send
);
97 gen_configure_event_output(k
, EVT_COEFFS
, "Coefficients");
99 gencomp_register_generatorclass(k
, FALSE
, GENERATOR_CLASS_PATH
,
104 PUBLIC
void init_plugin(void) {