circuitpython/shared-bindings/synthio/Synthesizer.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 <stdint.h>

#include "shared/runtime/context_manager_helpers.h"
#include "py/binary.h"
#include "py/objproperty.h"
#include "py/runtime.h"
#include "shared-bindings/util.h"
#include "shared-bindings/synthio/Synthesizer.h"
#include "shared-bindings/synthio/__init__.h"
#include "supervisor/shared/translate/translate.h"

//| class Synthesizer:
//|     def __init__(self, *, sample_rate: int = 11025, waveform: ReadableBuffer = None) -> None:
//|         """Create a synthesizer object.
//|
//|         This API is experimental.
//|
//|         At least 2 simultaneous notes are supported.  mimxrt10xx and rp2040 platforms support up to
//|         12 notes.
//|
//|         Notes use MIDI note numbering, with 60 being C4 or Middle C, approximately 262Hz.
//|
//|         :param int sample_rate: The desired playback sample rate; higher sample rate requires more memory
//|         :param ReadableBuffer waveform: A single-cycle waveform. Default is a 50% duty cycle square wave. If specified, must be a ReadableBuffer of type 'h' (signed 16 bit). It is permitted to modify this buffer during synthesis. This can be used, for instance, to control the overall volume or timbre of the notes.
//|         """
STATIC mp_obj_t synthio_synthesizer_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
    enum { ARG_sample_rate, ARG_waveform };
    static const mp_arg_t allowed_args[] = {
        { MP_QSTR_sample_rate, MP_ARG_INT | MP_ARG_KW_ONLY, {.u_int = 11025} },
        { MP_QSTR_waveform, MP_ARG_OBJ | MP_ARG_KW_ONLY, {.u_obj = mp_const_none } },
    };
    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
    mp_arg_parse_all_kw_array(n_args, n_kw, all_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);

    mp_buffer_info_t bufinfo_waveform;
    synthio_synth_parse_waveform(&bufinfo_waveform, args[ARG_waveform].u_obj);

    synthio_synthesizer_obj_t *self = m_new_obj(synthio_synthesizer_obj_t);
    self->base.type = &synthio_synthesizer_type;

    common_hal_synthio_synthesizer_construct(self,
        args[ARG_sample_rate].u_int,
        bufinfo_waveform.buf,
        bufinfo_waveform.len / 2);

    return MP_OBJ_FROM_PTR(self);
}

STATIC void check_for_deinit(synthio_synthesizer_obj_t *self) {
    if (common_hal_synthio_synthesizer_deinited(self)) {
        raise_deinited_error();
    }
}

//|     def press(self, /, press: Sequence[int] = ()) -> None:
//|         """Turn some notes on. Notes use MIDI numbering, with 60 being middle C, approximately 262Hz.
//|
//|         Pressing a note that was already pressed has no effect.
//|
//|         :param Sequence[int] press: Any sequence of integer notes."""
STATIC mp_obj_t synthio_synthesizer_press(mp_obj_t self_in, mp_obj_t press) {
    synthio_synthesizer_obj_t *self = MP_OBJ_TO_PTR(self_in);
    check_for_deinit(self);
    common_hal_synthio_synthesizer_press(self, press);
    return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(synthio_synthesizer_press_obj, synthio_synthesizer_press);
//
//|     def release_then_press(
//|         self, release: Sequence[int] = (), press: Sequence[int] = ()
//|     ) -> None:
//|         """Turn some notes on and/or off. Notes use MIDI numbering, with 60 being middle C.
//|
//|         It is OK to release note that was not actually turned on.
//|
//|         Pressing a note that was already pressed has no effect.
//|
//|         Releasing and pressing the note again has little effect, but does reset the phase
//|         of the note, which may be perceptible as a small glitch.
//|
//|         :param Sequence[int] release: Any sequence of integer notes.
//|         :param Sequence[int] press: Any sequence of integer notes."""
STATIC mp_obj_t synthio_synthesizer_release_then_press(mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
    enum { ARG_release, ARG_press };
    static const mp_arg_t allowed_args[] = {
        { MP_QSTR_release, MP_ARG_OBJ, {.u_obj = mp_const_empty_tuple } },
        { MP_QSTR_press, MP_ARG_OBJ, {.u_obj = mp_const_empty_tuple } },
    };

    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
    mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);

    synthio_synthesizer_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]);
    check_for_deinit(self);
    common_hal_synthio_synthesizer_release(self, args[ARG_release].u_obj);
    common_hal_synthio_synthesizer_press(self, args[ARG_press].u_obj);
    return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(synthio_synthesizer_release_then_press_obj, 1, synthio_synthesizer_release_then_press);

//
//|     def release_all_then_press(self, /, press: Sequence[int]) -> None:
//|         """Turn any currently-playing notes off, then turn on the given notes
//|
//|         Releasing and pressing the note again has little effect, but does reset the phase
//|         of the note, which may be perceptible as a small glitch.
//|
//|         :param Sequence[int] press: Any sequence of integer notes."""
STATIC mp_obj_t synthio_synthesizer_release_all_then_press(mp_obj_t self_in, mp_obj_t press) {
    synthio_synthesizer_obj_t *self = MP_OBJ_TO_PTR(self_in);
    check_for_deinit(self);
    common_hal_synthio_synthesizer_release_all(self);
    common_hal_synthio_synthesizer_press(self, press);
    return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(synthio_synthesizer_release_all_then_press_obj, synthio_synthesizer_release_all_then_press);

//
//|     def release_all(self) -> None:
//|         """Turn any currently-playing notes off"""
STATIC mp_obj_t synthio_synthesizer_release_all(mp_obj_t self_in) {
    synthio_synthesizer_obj_t *self = MP_OBJ_TO_PTR(self_in);
    check_for_deinit(self);
    common_hal_synthio_synthesizer_release_all(self);
    return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(synthio_synthesizer_release_all_obj, synthio_synthesizer_release_all);

//|     def deinit(self) -> None:
//|         """Deinitialises the object and releases any memory resources for reuse."""
//|         ...
STATIC mp_obj_t synthio_synthesizer_deinit(mp_obj_t self_in) {
    synthio_synthesizer_obj_t *self = MP_OBJ_TO_PTR(self_in);
    common_hal_synthio_synthesizer_deinit(self);
    return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(synthio_synthesizer_deinit_obj, synthio_synthesizer_deinit);

//|     def __enter__(self) -> MidiTrack:
//|         """No-op used by Context Managers."""
//|         ...
//  Provided by context manager helper.
//|
//|     def __exit__(self) -> None:
//|         """Automatically deinitializes the hardware when exiting a context. See
//|         :ref:`lifetime-and-contextmanagers` for more info."""
//|         ...
STATIC mp_obj_t synthio_synthesizer_obj___exit__(size_t n_args, const mp_obj_t *args) {
    (void)n_args;
    common_hal_synthio_synthesizer_deinit(args[0]);
    return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(synthio_synthesizer___exit___obj, 4, 4, synthio_synthesizer_obj___exit__);
//|     sample_rate: int
//|     """32 bit value that tells how quickly samples are played in Hertz (cycles per second)."""
STATIC mp_obj_t synthio_synthesizer_obj_get_sample_rate(mp_obj_t self_in) {
    synthio_synthesizer_obj_t *self = MP_OBJ_TO_PTR(self_in);
    check_for_deinit(self);
    return MP_OBJ_NEW_SMALL_INT(common_hal_synthio_synthesizer_get_sample_rate(self));
}
MP_DEFINE_CONST_FUN_OBJ_1(synthio_synthesizer_get_sample_rate_obj, synthio_synthesizer_obj_get_sample_rate);

MP_PROPERTY_GETTER(synthio_synthesizer_sample_rate_obj,
    (mp_obj_t)&synthio_synthesizer_get_sample_rate_obj);

//|     pressed: Tuple[int]
//|     """A sequence of the currently pressed notes (read-only property)"""
//|
STATIC mp_obj_t synthio_synthesizer_obj_get_pressed(mp_obj_t self_in) {
    synthio_synthesizer_obj_t *self = MP_OBJ_TO_PTR(self_in);
    check_for_deinit(self);
    return common_hal_synthio_synthesizer_get_pressed_notes(self);
}
MP_DEFINE_CONST_FUN_OBJ_1(synthio_synthesizer_get_pressed_obj, synthio_synthesizer_obj_get_pressed);

MP_PROPERTY_GETTER(synthio_synthesizer_pressed_obj,
    (mp_obj_t)&synthio_synthesizer_get_pressed_obj);

//|     max_polyphony: int
//|     """Maximum polyphony of the synthesizer (read-only class property)"""
//|

STATIC const mp_rom_map_elem_t synthio_synthesizer_locals_dict_table[] = {
    // Methods
    { MP_ROM_QSTR(MP_QSTR_press), MP_ROM_PTR(&synthio_synthesizer_press_obj) },
    { MP_ROM_QSTR(MP_QSTR_release_all), MP_ROM_PTR(&synthio_synthesizer_release_all_obj) },
    { MP_ROM_QSTR(MP_QSTR_release_then_press), MP_ROM_PTR(&synthio_synthesizer_release_then_press_obj) },
    { MP_ROM_QSTR(MP_QSTR_release_all_then_press), MP_ROM_PTR(&synthio_synthesizer_release_all_then_press_obj) },
    { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&synthio_synthesizer_deinit_obj) },
    { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&synthio_synthesizer___exit___obj) },

    // Properties
    { MP_ROM_QSTR(MP_QSTR_sample_rate), MP_ROM_PTR(&synthio_synthesizer_sample_rate_obj) },
    { MP_ROM_QSTR(MP_QSTR_max_polyphony), MP_ROM_INT(CIRCUITPY_SYNTHIO_MAX_CHANNELS) },
    { MP_ROM_QSTR(MP_QSTR_pressed), MP_ROM_PTR(&synthio_synthesizer_pressed_obj) },
};
STATIC MP_DEFINE_CONST_DICT(synthio_synthesizer_locals_dict, synthio_synthesizer_locals_dict_table);

STATIC const audiosample_p_t synthio_synthesizer_proto = {
    MP_PROTO_IMPLEMENT(MP_QSTR_protocol_audiosample)
    .sample_rate = (audiosample_sample_rate_fun)common_hal_synthio_synthesizer_get_sample_rate,
    .bits_per_sample = (audiosample_bits_per_sample_fun)common_hal_synthio_synthesizer_get_bits_per_sample,
    .channel_count = (audiosample_channel_count_fun)common_hal_synthio_synthesizer_get_channel_count,
    .reset_buffer = (audiosample_reset_buffer_fun)synthio_synthesizer_reset_buffer,
    .get_buffer = (audiosample_get_buffer_fun)synthio_synthesizer_get_buffer,
    .get_buffer_structure = (audiosample_get_buffer_structure_fun)synthio_synthesizer_get_buffer_structure,
};

const mp_obj_type_t synthio_synthesizer_type = {
    { &mp_type_type },
    .name = MP_QSTR_Synthesizer,
    .flags = MP_TYPE_FLAG_EXTENDED,
    .make_new = synthio_synthesizer_make_new,
    .locals_dict = (mp_obj_dict_t *)&synthio_synthesizer_locals_dict,
    MP_TYPE_EXTENDED_FIELDS(
        .protocol = &synthio_synthesizer_proto,
        ),
};