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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 "global.h"
#include "generator.h"
#include "comp.h"
#include "control.h"
#include "gencomp.h"
#include "msgbox.h"
#define NUM_VOICES 8
#define GENERATOR_CLASS_NAME "voice-allocator"
#define GENERATOR_CLASS_PATH "Misc/Voice Alocator"
typedef struct Data {
gint note[NUM_VOICES];
gint alloc_ring;
} Data;
PRIVATE int init_instance(Generator *g) {
int i;
Data *data = safe_malloc( sizeof( Data ) );
for( i=0; i<NUM_VOICES; i++ )
data->note[i] = -1;
data->alloc_ring = 0;
g->data = data;
return 1;
}
PRIVATE void destroy_instance(Generator *g) {
free( g->data );
}
PRIVATE void unpickle_instance(Generator *g, ObjectStoreItem *item, ObjectStore *db) {
int i;
ObjectStoreDatum *array;
Data *data = safe_malloc(sizeof(Data));
data->alloc_ring = 0;
array = objectstore_item_get(item, "note");
for (i = 0; i < NUM_VOICES; i++)
data->note[i] =
objectstore_datum_integer_value(
objectstore_datum_array_get(array, i )
);
g->data = data;
}
PRIVATE void pickle_instance(Generator *g, ObjectStoreItem *item, ObjectStore *db) {
Data *data = g->data;
ObjectStoreDatum *array = objectstore_datum_new_array(NUM_VOICES );
int i;
objectstore_item_set(item, "note", array);
for (i = 0; i < NUM_VOICES; i++)
objectstore_datum_array_set(array, i,
objectstore_datum_new_integer(data->note[i]));
}
PRIVATE void evt_note_on_handler(Generator *g, AEvent *event) {
Data *data = g->data;
gint note = event->d.number;
int i;
for( i=0; i<NUM_VOICES; i++ ) {
if( data->note[i] == note ) {
gen_send_events(g, i*2, -1, event);
return;
}
}
for( i=data->alloc_ring; i<NUM_VOICES+data->alloc_ring; i++ ) {
if( data->note[i%NUM_VOICES] == -1 ) {
data->note[i%NUM_VOICES] = note;
gen_send_events(g, (i%NUM_VOICES)*2, -1, event);
data->alloc_ring++;
return;
}
}
printf( "No more free voices and no lru function yet: dropping note\n" );
}
PRIVATE void evt_note_off_handler(Generator *g, AEvent *event) {
Data *data = g->data;
gint note = event->d.number;
int i;
for( i=0; i<NUM_VOICES; i++ ) {
if( data->note[i] == note ) {
data->note[i] = -1;
gen_send_events(g, i*2+1, -1, event);
return;
}
}
printf( "Spurious Note off\n" );
}
PRIVATE void evt_reset_handler(Generator *g, AEvent *event) {
Data *data = g->data;
int i;
for( i=0; i<NUM_VOICES; i++ ) {
data->note[i] = -1;
gen_send_events(g, i*2+1, -1, event);
}
}
PRIVATE ControlDescriptor controls[] = {
{ CONTROL_KIND_NONE, }
};
PRIVATE void setup_class(void) {
int i;
GeneratorClass *k = gen_new_generatorclass(GENERATOR_CLASS_NAME, FALSE, 3, NUM_VOICES * 2,
NULL, NULL, controls,
init_instance, destroy_instance,
unpickle_instance, pickle_instance);
gen_configure_event_input(k, 0, "Note On", evt_note_on_handler);
gen_configure_event_input(k, 1, "Note Off", evt_note_off_handler);
gen_configure_event_input(k, 2, "Reset", evt_reset_handler);
for( i=0; i<NUM_VOICES; i++ ) {
gen_configure_event_output(k, i*2, g_strdup_printf( "Note On %d", i ) );
gen_configure_event_output(k, i*2+1, g_strdup_printf( "Note Off %d", i ) );
}
gencomp_register_generatorclass(k, FALSE, GENERATOR_CLASS_PATH, NULL, NULL);
}
PUBLIC void init_plugin_voice_allocator(void) {
setup_class();
}
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