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 "evtadd"
35 #define GENERATOR_CLASS_PATH "Events/Sum"
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
, "evtadd_addend", 0);
68 PRIVATE
void pickle_instance(Generator
*g
, ObjectStoreItem
*item
, ObjectStore
*db
) {
70 objectstore_item_set_double(item
, "evtadd_addend", data
->addend
);
73 PRIVATE
void evt_input_handler(Generator
*g
, AEvent
*event
) {
76 switch( event
->kind
) {
78 event
->d
.number
+= ((Data
*) g
->data
)->addend
;
79 gen_send_events(g
, EVT_OUTPUT
, -1, event
);
82 for( i
=0; i
<event
->d
.array
.len
; i
++ )
83 event
->d
.array
.numbers
[i
] += ((Data
*) g
->data
)->addend
;
85 gen_send_events(g
, EVT_OUTPUT
, -1, event
);
88 g_warning( "evtsum does not know this eventkind\n" );
93 PRIVATE
void evt_addend_handler(Generator
*g
, AEvent
*event
) {
94 ((Data
*) g
->data
)->addend
= event
->d
.number
;
97 PRIVATE ControlDescriptor controls
[] = {
98 /* { kind, name, min,max,step,page, size,editable, is_dst,queue_number,
99 init,destroy,refresh,refresh_data }, */
100 { CONTROL_KIND_KNOB
, "bias", -1,1,0.1,0.01, 0,TRUE
, TRUE
,EVT_ADDEND
,
101 NULL
,NULL
, control_double_updater
, (gpointer
) offsetof(Data
, addend
) },
102 { CONTROL_KIND_NONE
, }
105 PRIVATE
void setup_class(void) {
106 GeneratorClass
*k
= gen_new_generatorclass(GENERATOR_CLASS_NAME
, FALSE
,
107 NUM_EVENT_INPUTS
, NUM_EVENT_OUTPUTS
,
108 NULL
, NULL
, controls
,
109 init_instance
, destroy_instance
,
110 unpickle_instance
, pickle_instance
);
112 gen_configure_event_input(k
, EVT_INPUT
, "Input", evt_input_handler
);
113 gen_configure_event_input(k
, EVT_ADDEND
, "Addend", evt_addend_handler
);
114 gen_configure_event_output(k
, EVT_OUTPUT
, "Output");
116 gencomp_register_generatorclass(k
, FALSE
, GENERATOR_CLASS_PATH
,
121 PUBLIC
void init_plugin(void) {