Sampled Instrument Player with static and monolithic design. All instruments are built-in.
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/*
Calf Box, an open source musical instrument.
Copyright (C) 2010-2011 Krzysztof Foltman
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "biquad-float.h"
#include "config.h"
#include "config-api.h"
#include "dspmath.h"
#include "eq.h"
#include "module.h"
#include <glib.h>
#include <malloc.h>
#include <math.h>
#include <memory.h>
#include <sndfile.h>
#include <stdio.h>
#include <stdlib.h>
#define MODULE_PARAMS parametric_eq_params
#define MAX_EQ_BANDS 4
struct parametric_eq_params
{
struct eq_band bands[MAX_EQ_BANDS];
};
struct parametric_eq_module
{
struct cbox_module module;
struct parametric_eq_params *params, *old_params;
struct cbox_biquadf_state state[MAX_EQ_BANDS][2];
struct cbox_biquadf_coeffs coeffs[MAX_EQ_BANDS];
};
static void redo_filters(struct parametric_eq_module *m)
{
for (int i = 0; i < MAX_EQ_BANDS; i++)
{
struct eq_band *band = &m->params->bands[i];
if (band->active)
{
cbox_biquadf_set_peakeq_rbj(&m->coeffs[i], band->center, band->q, band->gain, m->module.srate);
}
}
m->old_params = m->params;
}
gboolean parametric_eq_process_cmd(struct cbox_command_target *ct, struct cbox_command_target *fb, struct cbox_osc_command *cmd, GError **error)
{
struct parametric_eq_module *m = (struct parametric_eq_module *)ct->user_data;
EFFECT_PARAM_ARRAY("/active", "i", bands, active, int, , 0, 1) else
EFFECT_PARAM_ARRAY("/center", "f", bands, center, double, , 10, 20000) else
EFFECT_PARAM_ARRAY("/q", "f", bands, q, double, , 0.01, 100) else
EFFECT_PARAM_ARRAY("/gain", "f", bands, gain, double, dB2gain_simple, -100, 100) else
if (!strcmp(cmd->command, "/status") && !strcmp(cmd->arg_types, ""))
{
if (!cbox_check_fb_channel(fb, cmd->command, error))
return FALSE;
for (int i = 0; i < MAX_EQ_BANDS; i++)
{
if (!cbox_execute_on(fb, NULL, "/active", "ii", error, i, (int)m->params->bands[i].active))
return FALSE;
if (!cbox_execute_on(fb, NULL, "/center", "if", error, i, m->params->bands[i].center))
return FALSE;
if (!cbox_execute_on(fb, NULL, "/q", "if", error, i, m->params->bands[i].q))
return FALSE;
if (!cbox_execute_on(fb, NULL, "/gain", "if", error, i, gain2dB_simple(m->params->bands[i].gain)))
return FALSE;
}
// return cbox_execute_on(fb, NULL, "/wet_dry", "f", error, m->params->wet_dry);
return CBOX_OBJECT_DEFAULT_STATUS(&m->module, fb, error);
}
else
return cbox_object_default_process_cmd(ct, fb, cmd, error);
return TRUE;
}
void parametric_eq_process_event(struct cbox_module *module, const uint8_t *data, uint32_t len)
{
// struct parametric_eq_module *m = (struct parametric_eq_module *)module;
}
void parametric_eq_process_block(struct cbox_module *module, cbox_sample_t **inputs, cbox_sample_t **outputs)
{
struct parametric_eq_module *m = (struct parametric_eq_module *)module;
if (m->params != m->old_params)
redo_filters(m);
for (int c = 0; c < 2; c++)
{
gboolean first = TRUE;
for (int i = 0; i < MAX_EQ_BANDS; i++)
{
if (!m->params->bands[i].active)
continue;
if (first)
{
cbox_biquadf_process_to(&m->state[i][c], &m->coeffs[i], inputs[c], outputs[c]);
first = FALSE;
}
else
{
cbox_biquadf_process(&m->state[i][c], &m->coeffs[i], outputs[c]);
}
}
if (first)
memcpy(outputs[c], inputs[c], sizeof(float) * CBOX_BLOCK_SIZE);
}
}
float cbox_eq_get_band_param(const char *cfg_section, int band, const char *param, float defvalue)
{
gchar *s = g_strdup_printf("band%d_%s", band + 1, param);
float v = cbox_config_get_float(cfg_section, s, defvalue);
g_free(s);
return v;
}
float cbox_eq_get_band_param_db(const char *cfg_section, int band, const char *param, float defvalue)
{
gchar *s = g_strdup_printf("band%d_%s", band + 1, param);
float v = cbox_config_get_gain_db(cfg_section, s, defvalue);
g_free(s);
return v;
}
void cbox_eq_reset_bands(struct cbox_biquadf_state state[1][2], int bands)
{
for (int b = 0; b < MAX_EQ_BANDS; b++)
for (int c = 0; c < 2; c++)
cbox_biquadf_reset(&state[b][c]);
}
MODULE_SIMPLE_DESTROY_FUNCTION(parametric_eq)
MODULE_CREATE_FUNCTION(parametric_eq)
{
static int inited = 0;
if (!inited)
{
inited = 1;
}
struct parametric_eq_module *m = malloc(sizeof(struct parametric_eq_module));
CALL_MODULE_INIT(m, 2, 2, parametric_eq);
m->module.process_event = parametric_eq_process_event;
m->module.process_block = parametric_eq_process_block;
struct parametric_eq_params *p = malloc(sizeof(struct parametric_eq_params));
m->params = p;
m->old_params = NULL;
for (int b = 0; b < MAX_EQ_BANDS; b++)
{
p->bands[b].active = cbox_eq_get_band_param(cfg_section, b, "active", 0) > 0;
p->bands[b].center = cbox_eq_get_band_param(cfg_section, b, "center", 50 * pow(4.0, b));
p->bands[b].q = cbox_eq_get_band_param(cfg_section, b, "q", 0.707);
p->bands[b].gain = cbox_eq_get_band_param_db(cfg_section, b, "gain", 0);
}
cbox_eq_reset_bands(m->state, MAX_EQ_BANDS);
return &m->module;
}
struct cbox_module_keyrange_metadata parametric_eq_keyranges[] = {
};
struct cbox_module_livecontroller_metadata parametric_eq_controllers[] = {
};
DEFINE_MODULE(parametric_eq, 2, 2)