circuitpython/shared-module/synthio/LFO.h

51 lines
2.2 KiB
C

/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* 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.
*/
#pragma once
#include "shared-module/synthio/block.h"
typedef struct synthio_lfo_obj {
synthio_block_base_t base;
bool once, interpolate;
synthio_block_slot_t rate, scale, offset, phase_offset;
mp_float_t accum;
mp_obj_t waveform_obj;
mp_buffer_info_t waveform_bufinfo;
} synthio_lfo_obj_t;
// Update the value inside the lfo slot if the value is an LFO, returning the new value
mp_float_t synthio_block_slot_get(synthio_block_slot_t *block_slot);
// the same, but the output is constrained to be between lo and hi
mp_float_t synthio_block_slot_get_limited(synthio_block_slot_t *block_slot, mp_float_t lo, mp_float_t hi);
// the same, but the output is constrained to be between lo and hi and converted to an integer with 15 fractional bits
int32_t synthio_block_slot_get_scaled(synthio_block_slot_t *block_slot, mp_float_t lo, mp_float_t hi);
// Assign an object (which may be a float or a synthio_block_obj_t) to an block slot
void synthio_block_assign_slot(mp_obj_t obj, synthio_block_slot_t *block_slot, qstr arg_name);