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 "midievt_noteon"
35 #define GENERATOR_CLASS_PATH "MIDI Events/NoteOn"
38 #define EVT_VELOCITY 1
40 #define NUM_EVENT_INPUTS 3
43 #define NUM_EVENT_OUTPUTS 1
50 PRIVATE
int init_instance(Generator
*g
) {
51 Data
*data
= safe_malloc(sizeof(Data
));
60 PRIVATE
void destroy_instance(Generator
*g
) {
64 PRIVATE
void unpickle_instance(Generator
*g
, ObjectStoreItem
*item
, ObjectStore
*db
) {
65 Data
*data
= safe_malloc(sizeof(Data
));
68 data
->velocity
= objectstore_item_get_double(item
, "velocity", 127);
69 data
->channel
= objectstore_item_get_double(item
, "channel", 0);
72 PRIVATE
void pickle_instance(Generator
*g
, ObjectStoreItem
*item
, ObjectStore
*db
) {
74 objectstore_item_set_double(item
, "velocity", data
->velocity
);
75 objectstore_item_set_double(item
, "channel", data
->channel
);
78 PRIVATE
void evt_note_handler(Generator
*g
, AEvent
*event
) {
82 switch( event
->kind
) {
84 note
= ((char) event
->d
.number
) & 0x7f;
85 event
->kind
= AE_MIDIEVENT
;
86 event
->d
.midiev
.len
= 3;
87 event
->d
.midiev
.midistring
[0] = 0x90 | (data
->channel
& 0x0f);
88 event
->d
.midiev
.midistring
[1] = note
;
89 event
->d
.midiev
.midistring
[2] = data
->velocity
;
90 gen_send_events(g
, EVT_OUTPUT
, -1, event
);
93 g_warning( "midi_note does not know this eventkind\n" );
98 PRIVATE
void evt_velocity_handler(Generator
*g
, AEvent
*event
) {
99 ((Data
*) g
->data
)->velocity
= (char) event
->d
.number
& 0x7f;
102 PRIVATE
void evt_channel_handler(Generator
*g
, AEvent
*event
) {
103 ((Data
*) g
->data
)->channel
= (char) event
->d
.number
& 0x0f;
106 PRIVATE ControlDescriptor controls
[] = {
107 /* { kind, name, min,max,step,page, size,editable, is_dst,queue_number,
108 init,destroy,refresh,refresh_data }, */
109 // { CONTROL_KIND_KNOB, "velocity", -1,1,0.1,0.01, 0,TRUE, TRUE, EVT_ADDEND,
110 // NULL,NULL, control_double_updater, (gpointer) offsetof(Data, addend) },
111 { CONTROL_KIND_NONE
, }
114 PRIVATE
void setup_class(void) {
115 GeneratorClass
*k
= gen_new_generatorclass(GENERATOR_CLASS_NAME
, FALSE
,
116 NUM_EVENT_INPUTS
, NUM_EVENT_OUTPUTS
,
117 NULL
, NULL
, controls
,
118 init_instance
, destroy_instance
,
119 unpickle_instance
, pickle_instance
);
121 gen_configure_event_input(k
, EVT_NOTE
, "Note", evt_note_handler
);
122 gen_configure_event_input(k
, EVT_VELOCITY
, "Velocity", evt_velocity_handler
);
123 gen_configure_event_input(k
, EVT_CHANNEL
, "Channel", evt_channel_handler
);
124 gen_configure_event_output(k
, EVT_OUTPUT
, "Output");
126 gencomp_register_generatorclass(k
, FALSE
, GENERATOR_CLASS_PATH
,
131 PUBLIC
void init_plugin(void) {