95 lines
3.8 KiB
C
95 lines
3.8 KiB
C
/*
|
|
* This file is part of the MicroPython project, http://micropython.org/
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2021 Artyom Skrobov
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
|
|
#include <math.h>
|
|
#include <string.h>
|
|
|
|
#include "py/enum.h"
|
|
#include "py/mperrno.h"
|
|
#include "py/obj.h"
|
|
#include "py/objnamedtuple.h"
|
|
#include "py/runtime.h"
|
|
|
|
#include "shared-bindings/synthio/__init__.h"
|
|
#include "shared-bindings/synthio/LFO.h"
|
|
#include "shared-bindings/synthio/Math.h"
|
|
#include "shared-bindings/synthio/MidiTrack.h"
|
|
#include "shared-bindings/synthio/Note.h"
|
|
#include "shared-bindings/synthio/Synthesizer.h"
|
|
|
|
#include "shared-module/synthio/LFO.h"
|
|
|
|
#define default_attack_time (MICROPY_FLOAT_CONST(0.1))
|
|
#define default_decay_time (MICROPY_FLOAT_CONST(0.05))
|
|
#define default_release_time (MICROPY_FLOAT_CONST(0.2))
|
|
#define default_attack_level (MICROPY_FLOAT_CONST(1.))
|
|
#define default_sustain_level (MICROPY_FLOAT_CONST(0.8))
|
|
|
|
static const mp_arg_t biquad_properties[] = {
|
|
{ MP_QSTR_a1, MP_ARG_OBJ | MP_ARG_REQUIRED, {.u_obj = MP_ROM_NONE} },
|
|
{ MP_QSTR_a2, MP_ARG_OBJ | MP_ARG_REQUIRED, {.u_obj = MP_ROM_NONE} },
|
|
{ MP_QSTR_b0, MP_ARG_OBJ | MP_ARG_REQUIRED, {.u_obj = MP_ROM_NONE} },
|
|
{ MP_QSTR_b1, MP_ARG_OBJ | MP_ARG_REQUIRED, {.u_obj = MP_ROM_NONE} },
|
|
{ MP_QSTR_b2, MP_ARG_OBJ | MP_ARG_REQUIRED, {.u_obj = MP_ROM_NONE} },
|
|
};
|
|
|
|
//| class Biquad:
|
|
//| def __init__(self, b0: float, b1: float, b2: float, a1: float, a2: float) -> None:
|
|
//| """Construct a normalized biquad filter object.
|
|
//|
|
|
//| This implements the "direct form 1" biquad filter, where each coefficient
|
|
//| has been pre-divided by a0.
|
|
//|
|
|
//| Biquad objects are usually constructed via one of the related methods on a `Synthesizer` object
|
|
//| rather than directly from coefficients.
|
|
//|
|
|
//| https://github.com/WebAudio/Audio-EQ-Cookbook/blob/main/Audio-EQ-Cookbook.txt
|
|
//| """
|
|
//|
|
|
STATIC mp_obj_t synthio_biquad_make_new(const mp_obj_type_t *type_in, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
|
|
mp_arg_val_t args[MP_ARRAY_SIZE(biquad_properties)];
|
|
mp_arg_parse_all_kw_array(n_args, n_kw, all_args, MP_ARRAY_SIZE(biquad_properties), biquad_properties, args);
|
|
|
|
for (size_t i = 0; i < MP_ARRAY_SIZE(biquad_properties); i++) {
|
|
args[i].u_obj = mp_obj_new_float(mp_arg_validate_type_float(args[i].u_obj, biquad_properties[i].qst));
|
|
}
|
|
|
|
MP_STATIC_ASSERT(sizeof(mp_arg_val_t) == sizeof(mp_obj_t));
|
|
return namedtuple_make_new(type_in, MP_ARRAY_SIZE(args), 0, &args[0].u_obj);
|
|
}
|
|
|
|
const mp_obj_namedtuple_type_t synthio_biquad_type_obj = {
|
|
NAMEDTUPLE_TYPE_BASE_AND_SLOTS_MAKE_NEW(MP_QSTR_Biquad, synthio_biquad_make_new),
|
|
.n_fields = 5,
|
|
.fields = {
|
|
MP_QSTR_a1,
|
|
MP_QSTR_a2,
|
|
MP_QSTR_b0,
|
|
MP_QSTR_b1,
|
|
MP_QSTR_b2,
|
|
},
|
|
};
|