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 "evtpower"
35 #define GENERATOR_CLASS_PATH "Events/Power"
39 #define NUM_EVENT_INPUTS 2
42 #define NUM_EVENT_OUTPUTS 1
48 PRIVATE
int init_instance(Generator
*g
) {
49 Data
*data
= safe_malloc(sizeof(Data
));
57 PRIVATE
void destroy_instance(Generator
*g
) {
61 PRIVATE
void unpickle_instance(Generator
*g
, ObjectStoreItem
*item
, ObjectStore
*db
) {
62 Data
*data
= safe_malloc(sizeof(Data
));
65 data
->addend
= objectstore_item_get_double(item
, "evtpower_addend", 0);
68 PRIVATE
void pickle_instance(Generator
*g
, ObjectStoreItem
*item
, ObjectStore
*db
) {
70 objectstore_item_set_double(item
, "evtpower_addend", data
->addend
);
73 PRIVATE
void evt_input_handler(Generator
*g
, AEvent
*event
) {
75 event
->d
.number
= pow( event
->d
.number
, ((Data
*) g
->data
)->addend
) ;
76 gen_send_events(g
, EVT_OUTPUT
, -1, event
);
79 PRIVATE
void evt_addend_handler(Generator
*g
, AEvent
*event
) {
80 ((Data
*) g
->data
)->addend
= event
->d
.number
;
83 PRIVATE ControlDescriptor controls
[] = {
84 /* { kind, name, min,max,step,page, size,editable, is_dst,queue_number,
85 init,destroy,refresh,refresh_data }, */
86 { CONTROL_KIND_KNOB
, "power", -1,1,0.1,0.01, 0,TRUE
, TRUE
,EVT_ADDEND
,
87 NULL
,NULL
, control_double_updater
, (gpointer
) offsetof(Data
, addend
) },
88 { CONTROL_KIND_NONE
, }
91 PRIVATE
void setup_class(void) {
92 GeneratorClass
*k
= gen_new_generatorclass(GENERATOR_CLASS_NAME
, FALSE
,
93 NUM_EVENT_INPUTS
, NUM_EVENT_OUTPUTS
,
95 init_instance
, destroy_instance
,
96 unpickle_instance
, pickle_instance
);
98 gen_configure_event_input(k
, EVT_INPUT
, "Input", evt_input_handler
);
99 gen_configure_event_input(k
, EVT_ADDEND
, "Power", evt_addend_handler
);
100 gen_configure_event_output(k
, EVT_OUTPUT
, "Output");
102 gencomp_register_generatorclass(k
, FALSE
, GENERATOR_CLASS_PATH
,
107 PUBLIC
void init_plugin(void) {