263 lines
10 KiB
C
263 lines
10 KiB
C
/*
|
|
* This file is part of the Micro Python project, http://micropython.org/
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2021 Artyom Skrobov
|
|
* Copyright (c) 2023 Jeff Epler for Adafruit Industries
|
|
*
|
|
* 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 "py/obj.h"
|
|
#include "py/objproperty.h"
|
|
#include "py/proto.h"
|
|
#include "py/runtime.h"
|
|
#include "shared-bindings/util.h"
|
|
#include "shared-bindings/synthio/LFO.h"
|
|
#include "shared-module/synthio/LFO.h"
|
|
|
|
//| class LFO:
|
|
//| """A low-frequency oscillator block
|
|
//|
|
|
//| Every `rate` seconds, the output of the LFO cycles through its `waveform`.
|
|
//| The output at any particular moment is ``waveform[idx] * scale + offset``.
|
|
//|
|
|
//| `rate`, `offset`, `scale`, and `once` can be changed at run-time. `waveform` may be mutated.
|
|
//|
|
|
//| `waveform` must be a ``ReadableBuffer`` with elements of type ``'h'``
|
|
//| (16-bit signed integer). Internally, the elements of `waveform` are scaled
|
|
//| so that the input range ``[-32768,32767]`` maps to ``[-1.0, 0.99996]``.
|
|
//|
|
|
//| An LFO only updates if it is actually associated with a playing `Synthesizer`,
|
|
//| including indirectly via a `Note` or another intermediate LFO.
|
|
//|
|
|
//| Using the same LFO as an input to multiple other LFOs or Notes is OK, but
|
|
//| the result if an LFO is tied to multiple Synthtesizer objects is undefined.
|
|
//|
|
|
//| In the current implementation, LFOs are updated every 256 samples. This
|
|
//| should be considered an implementation detail, though it affects how LFOs
|
|
//| behave for instance when used to implement an integrator (``l.offset = l``).
|
|
//| """
|
|
//|
|
|
//| def __init__(
|
|
//| self,
|
|
//| waveform: ReadableBuffer,
|
|
//| *,
|
|
//| rate: BlockInput = 1.0,
|
|
//| scale: BlockInput = 1.0,
|
|
//| offset: BlockInput = 0,
|
|
//| once=False
|
|
//| ):
|
|
//| pass
|
|
static const mp_arg_t lfo_properties[] = {
|
|
{ MP_QSTR_waveform, MP_ARG_OBJ | MP_ARG_REQUIRED, {.u_obj = NULL } },
|
|
{ MP_QSTR_rate, MP_ARG_OBJ | MP_ARG_KW_ONLY, {.u_obj = MP_ROM_INT(1) } },
|
|
{ MP_QSTR_scale, MP_ARG_OBJ | MP_ARG_KW_ONLY, {.u_obj = MP_ROM_INT(1) } },
|
|
{ MP_QSTR_offset, MP_ARG_OBJ | MP_ARG_KW_ONLY, {.u_obj = MP_ROM_INT(0) } },
|
|
{ MP_QSTR_once, MP_ARG_OBJ | MP_ARG_KW_ONLY, {.u_obj = MP_ROM_INT(0) } },
|
|
};
|
|
|
|
STATIC mp_obj_t synthio_lfo_make_new(const mp_obj_type_t *type_in, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
|
|
enum { ARG_waveform }; // others never directly referred to by argument number
|
|
|
|
mp_arg_val_t args[MP_ARRAY_SIZE(lfo_properties)];
|
|
mp_arg_parse_all_kw_array(n_args, n_kw, all_args, MP_ARRAY_SIZE(lfo_properties), lfo_properties, args);
|
|
|
|
synthio_lfo_obj_t *self = m_new_obj(synthio_lfo_obj_t);
|
|
self->base.base.type = &synthio_lfo_type;
|
|
|
|
synthio_synth_parse_waveform(&self->waveform_bufinfo, args[ARG_waveform].u_obj);
|
|
self->waveform_obj = args[ARG_waveform].u_obj;
|
|
self->base.last_tick = synthio_global_tick;
|
|
|
|
mp_obj_t result = MP_OBJ_FROM_PTR(self);
|
|
properties_construct_helper(result, lfo_properties + 1, args + 1, MP_ARRAY_SIZE(lfo_properties) - 1);
|
|
|
|
return result;
|
|
};
|
|
|
|
//| waveform: Optional[ReadableBuffer]
|
|
//| """The waveform of this lfo. (read-only, but the values in the buffer may be modified dynamically)"""
|
|
STATIC mp_obj_t synthio_lfo_get_waveform(mp_obj_t self_in) {
|
|
synthio_lfo_obj_t *self = MP_OBJ_TO_PTR(self_in);
|
|
return common_hal_synthio_lfo_get_waveform_obj(self);
|
|
}
|
|
MP_DEFINE_CONST_FUN_OBJ_1(synthio_lfo_get_waveform_obj, synthio_lfo_get_waveform);
|
|
|
|
MP_PROPERTY_GETTER(synthio_lfo_waveform_obj,
|
|
(mp_obj_t)&synthio_lfo_get_waveform_obj);
|
|
|
|
//| rate: BlockInput
|
|
//| """The rate (in Hz) at which the LFO cycles through its waveform"""
|
|
STATIC mp_obj_t synthio_lfo_get_rate(mp_obj_t self_in) {
|
|
synthio_lfo_obj_t *self = MP_OBJ_TO_PTR(self_in);
|
|
return common_hal_synthio_lfo_get_rate_obj(self);
|
|
}
|
|
MP_DEFINE_CONST_FUN_OBJ_1(synthio_lfo_get_rate_obj, synthio_lfo_get_rate);
|
|
|
|
STATIC mp_obj_t synthio_lfo_set_rate(mp_obj_t self_in, mp_obj_t arg) {
|
|
synthio_lfo_obj_t *self = MP_OBJ_TO_PTR(self_in);
|
|
common_hal_synthio_lfo_set_rate_obj(self, arg);
|
|
return mp_const_none;
|
|
}
|
|
MP_DEFINE_CONST_FUN_OBJ_2(synthio_lfo_set_rate_obj, synthio_lfo_set_rate);
|
|
MP_PROPERTY_GETSET(synthio_lfo_rate_obj,
|
|
(mp_obj_t)&synthio_lfo_get_rate_obj,
|
|
(mp_obj_t)&synthio_lfo_set_rate_obj);
|
|
|
|
|
|
//| offset: BlockInput
|
|
//| """An additive value applied to the LFO's output"""
|
|
STATIC mp_obj_t synthio_lfo_get_offset(mp_obj_t self_in) {
|
|
synthio_lfo_obj_t *self = MP_OBJ_TO_PTR(self_in);
|
|
return common_hal_synthio_lfo_get_offset_obj(self);
|
|
}
|
|
MP_DEFINE_CONST_FUN_OBJ_1(synthio_lfo_get_offset_obj, synthio_lfo_get_offset);
|
|
|
|
STATIC mp_obj_t synthio_lfo_set_offset(mp_obj_t self_in, mp_obj_t arg) {
|
|
synthio_lfo_obj_t *self = MP_OBJ_TO_PTR(self_in);
|
|
common_hal_synthio_lfo_set_offset_obj(self, arg);
|
|
return mp_const_none;
|
|
}
|
|
MP_DEFINE_CONST_FUN_OBJ_2(synthio_lfo_set_offset_obj, synthio_lfo_set_offset);
|
|
MP_PROPERTY_GETSET(synthio_lfo_offset_obj,
|
|
(mp_obj_t)&synthio_lfo_get_offset_obj,
|
|
(mp_obj_t)&synthio_lfo_set_offset_obj);
|
|
|
|
//| scale: BlockInput
|
|
//| """An additive value applied to the LFO's output"""
|
|
STATIC mp_obj_t synthio_lfo_get_scale(mp_obj_t self_in) {
|
|
synthio_lfo_obj_t *self = MP_OBJ_TO_PTR(self_in);
|
|
return common_hal_synthio_lfo_get_scale_obj(self);
|
|
}
|
|
MP_DEFINE_CONST_FUN_OBJ_1(synthio_lfo_get_scale_obj, synthio_lfo_get_scale);
|
|
|
|
STATIC mp_obj_t synthio_lfo_set_scale(mp_obj_t self_in, mp_obj_t arg) {
|
|
synthio_lfo_obj_t *self = MP_OBJ_TO_PTR(self_in);
|
|
common_hal_synthio_lfo_set_scale_obj(self, arg);
|
|
return mp_const_none;
|
|
}
|
|
MP_DEFINE_CONST_FUN_OBJ_2(synthio_lfo_set_scale_obj, synthio_lfo_set_scale);
|
|
MP_PROPERTY_GETSET(synthio_lfo_scale_obj,
|
|
(mp_obj_t)&synthio_lfo_get_scale_obj,
|
|
(mp_obj_t)&synthio_lfo_set_scale_obj);
|
|
|
|
//|
|
|
//| once: bool
|
|
//| """True if the waveform should stop when it reaches its last output value, false if it should re-start at the beginning of its waveform"""
|
|
STATIC mp_obj_t synthio_lfo_get_once(mp_obj_t self_in) {
|
|
synthio_lfo_obj_t *self = MP_OBJ_TO_PTR(self_in);
|
|
return mp_obj_new_bool(common_hal_synthio_lfo_get_once(self));
|
|
}
|
|
MP_DEFINE_CONST_FUN_OBJ_1(synthio_lfo_get_once_obj, synthio_lfo_get_once);
|
|
|
|
STATIC mp_obj_t synthio_lfo_set_once(mp_obj_t self_in, mp_obj_t arg) {
|
|
synthio_lfo_obj_t *self = MP_OBJ_TO_PTR(self_in);
|
|
common_hal_synthio_lfo_set_once(self, mp_obj_is_true(arg));
|
|
return mp_const_none;
|
|
}
|
|
MP_DEFINE_CONST_FUN_OBJ_2(synthio_lfo_set_once_obj, synthio_lfo_set_once);
|
|
MP_PROPERTY_GETSET(synthio_lfo_once_obj,
|
|
(mp_obj_t)&synthio_lfo_get_once_obj,
|
|
(mp_obj_t)&synthio_lfo_set_once_obj);
|
|
|
|
|
|
//|
|
|
//| phase: float
|
|
//| """The phase of the oscillator, in the range 0 to 1 (read-only)"""
|
|
STATIC mp_obj_t synthio_lfo_get_phase(mp_obj_t self_in) {
|
|
synthio_lfo_obj_t *self = MP_OBJ_TO_PTR(self_in);
|
|
return mp_obj_new_float(common_hal_synthio_lfo_get_phase(self));
|
|
}
|
|
MP_DEFINE_CONST_FUN_OBJ_1(synthio_lfo_get_phase_obj, synthio_lfo_get_phase);
|
|
|
|
MP_PROPERTY_GETTER(synthio_lfo_phase_obj,
|
|
(mp_obj_t)&synthio_lfo_get_phase_obj);
|
|
|
|
|
|
//|
|
|
//| value: float
|
|
//| """The value of the oscillator (read-only)"""
|
|
STATIC mp_obj_t synthio_lfo_get_value(mp_obj_t self_in) {
|
|
synthio_lfo_obj_t *self = MP_OBJ_TO_PTR(self_in);
|
|
return mp_obj_new_float(common_hal_synthio_lfo_get_value(self));
|
|
}
|
|
MP_DEFINE_CONST_FUN_OBJ_1(synthio_lfo_get_value_obj, synthio_lfo_get_value);
|
|
|
|
MP_PROPERTY_GETTER(synthio_lfo_value_obj,
|
|
(mp_obj_t)&synthio_lfo_get_value_obj);
|
|
|
|
|
|
//|
|
|
//| def retrigger(self):
|
|
//| """Reset the LFO's internal index to the start of the waveform. Most useful when it its `once` property is `True`."""
|
|
//|
|
|
STATIC mp_obj_t synthio_lfo_retrigger(mp_obj_t self_in) {
|
|
synthio_lfo_obj_t *self = MP_OBJ_TO_PTR(self_in);
|
|
common_hal_synthio_lfo_retrigger(self);
|
|
return mp_const_none;
|
|
}
|
|
MP_DEFINE_CONST_FUN_OBJ_1(synthio_lfo_retrigger_obj, synthio_lfo_retrigger);
|
|
|
|
static void lfo_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
|
|
(void)kind;
|
|
properties_print_helper(print, self_in, lfo_properties, MP_ARRAY_SIZE(lfo_properties));
|
|
}
|
|
|
|
STATIC const mp_rom_map_elem_t synthio_lfo_locals_dict_table[] = {
|
|
{ MP_ROM_QSTR(MP_QSTR_waveform), MP_ROM_PTR(&synthio_lfo_waveform_obj) },
|
|
{ MP_ROM_QSTR(MP_QSTR_rate), MP_ROM_PTR(&synthio_lfo_rate_obj) },
|
|
{ MP_ROM_QSTR(MP_QSTR_scale), MP_ROM_PTR(&synthio_lfo_scale_obj) },
|
|
{ MP_ROM_QSTR(MP_QSTR_offset), MP_ROM_PTR(&synthio_lfo_offset_obj) },
|
|
{ MP_ROM_QSTR(MP_QSTR_once), MP_ROM_PTR(&synthio_lfo_once_obj) },
|
|
{ MP_ROM_QSTR(MP_QSTR_value), MP_ROM_PTR(&synthio_lfo_value_obj) },
|
|
{ MP_ROM_QSTR(MP_QSTR_phase), MP_ROM_PTR(&synthio_lfo_phase_obj) },
|
|
{ MP_ROM_QSTR(MP_QSTR_retrigger), MP_ROM_PTR(&synthio_lfo_retrigger_obj) },
|
|
};
|
|
STATIC MP_DEFINE_CONST_DICT(synthio_lfo_locals_dict, synthio_lfo_locals_dict_table);
|
|
|
|
|
|
STATIC const synthio_block_proto_t lfo_proto = {
|
|
MP_PROTO_IMPLEMENT(MP_QSTR_synthio_block)
|
|
.tick = common_hal_synthio_lfo_tick,
|
|
};
|
|
|
|
const mp_obj_type_t synthio_lfo_type = {
|
|
{ &mp_type_type },
|
|
.flags = MP_TYPE_FLAG_EXTENDED,
|
|
.name = MP_QSTR_LFO,
|
|
.make_new = synthio_lfo_make_new,
|
|
.locals_dict = (mp_obj_dict_t *)&synthio_lfo_locals_dict,
|
|
.print = lfo_print,
|
|
MP_TYPE_EXTENDED_FIELDS(
|
|
.protocol = &lfo_proto,
|
|
),
|
|
};
|
|
|
|
#if 0
|
|
const mp_obj_type_t synthio_math_type = {
|
|
{ &mp_type_type },
|
|
.name = MP_QSTR_Math,
|
|
.make_new = synthio_math_make_new,
|
|
.locals_dict = (mp_obj_dict_t *)&synthio_math_locals_dict,
|
|
.print = math_print,
|
|
};
|
|
#endif
|