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|
/*
* This file is part of the Micro Python 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 <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/MidiTrack.h"
#include "supervisor/shared/translate.h"
//| class MidiTrack:
//| """Simple square-wave MIDI synth"""
//|
//| def __init__(self, buffer: ReadableBuffer, tempo: int, *, sample_rate: int = 11025) -> None:
//| """Create a MidiTrack from the given stream of MIDI events. Only "Note On" and "Note Off" events
//| are supported; channel numbers and key velocities are ignored. Up to two notes may be on at the
//| same time.
//|
//| :param ~circuitpython_typing.ReadableBuffer buffer: Stream of MIDI events, as stored in a MIDI file track chunk
//| :param int tempo: Tempo of the streamed events, in MIDI ticks per second
//| :param int sample_rate: The desired playback sample rate; higher sample rate requires more memory
//|
//| Simple melody::
//|
//| import audioio
//| import board
//| import synthio
//|
//| dac = audioio.AudioOut(board.SPEAKER)
//| melody = synthio.MidiTrack(b"\\0\\x90H\\0*\\x80H\\0\\6\\x90J\\0*\\x80J\\0\\6\\x90L\\0*\\x80L\\0\\6\\x90J\\0" +
//| b"*\\x80J\\0\\6\\x90H\\0*\\x80H\\0\\6\\x90J\\0*\\x80J\\0\\6\\x90L\\0T\\x80L\\0" +
//| b"\\x0c\\x90H\\0T\\x80H\\0\\x0c\\x90H\\0T\\x80H\\0", tempo=640)
//| dac.play(melody)
//| print("playing")
//| while dac.playing:
//| pass
//| print("stopped")"""
//| ...
//|
STATIC mp_obj_t synthio_miditrack_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
enum { ARG_buffer, ARG_tempo, ARG_sample_rate };
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_buffer, MP_ARG_OBJ | MP_ARG_REQUIRED },
{ MP_QSTR_tempo, MP_ARG_INT | MP_ARG_REQUIRED },
{ MP_QSTR_sample_rate, MP_ARG_INT | MP_ARG_KW_ONLY, {.u_int = 11025} },
};
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;
mp_get_buffer_raise(args[ARG_buffer].u_obj, &bufinfo, MP_BUFFER_READ);
synthio_miditrack_obj_t *self = m_new_obj(synthio_miditrack_obj_t);
self->base.type = &synthio_miditrack_type;
common_hal_synthio_miditrack_construct(self,
(uint8_t *)bufinfo.buf, bufinfo.len,
args[ARG_tempo].u_int,
args[ARG_sample_rate].u_int);
return MP_OBJ_FROM_PTR(self);
}
//| def deinit(self) -> None:
//| """Deinitialises the MidiTrack and releases any hardware resources for reuse."""
//| ...
//|
STATIC mp_obj_t synthio_miditrack_deinit(mp_obj_t self_in) {
synthio_miditrack_obj_t *self = MP_OBJ_TO_PTR(self_in);
common_hal_synthio_miditrack_deinit(self);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(synthio_miditrack_deinit_obj, synthio_miditrack_deinit);
STATIC void check_for_deinit(synthio_miditrack_obj_t *self) {
if (common_hal_synthio_miditrack_deinited(self)) {
raise_deinited_error();
}
}
//| 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_miditrack_obj___exit__(size_t n_args, const mp_obj_t *args) {
(void)n_args;
common_hal_synthio_miditrack_deinit(args[0]);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(synthio_miditrack___exit___obj, 4, 4, synthio_miditrack_obj___exit__);
//| sample_rate: Optional[int]
//| """32 bit value that tells how quickly samples are played in Hertz (cycles per second)."""
//|
STATIC mp_obj_t synthio_miditrack_obj_get_sample_rate(mp_obj_t self_in) {
synthio_miditrack_obj_t *self = MP_OBJ_TO_PTR(self_in);
check_for_deinit(self);
return MP_OBJ_NEW_SMALL_INT(common_hal_synthio_miditrack_get_sample_rate(self));
}
MP_DEFINE_CONST_FUN_OBJ_1(synthio_miditrack_get_sample_rate_obj, synthio_miditrack_obj_get_sample_rate);
MP_PROPERTY_GETTER(synthio_miditrack_sample_rate_obj,
(mp_obj_t)&synthio_miditrack_get_sample_rate_obj);
STATIC const mp_rom_map_elem_t synthio_miditrack_locals_dict_table[] = {
// Methods
{ MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&synthio_miditrack_deinit_obj) },
{ MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
{ MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&synthio_miditrack___exit___obj) },
// Properties
{ MP_ROM_QSTR(MP_QSTR_sample_rate), MP_ROM_PTR(&synthio_miditrack_sample_rate_obj) },
};
STATIC MP_DEFINE_CONST_DICT(synthio_miditrack_locals_dict, synthio_miditrack_locals_dict_table);
STATIC const audiosample_p_t synthio_miditrack_proto = {
MP_PROTO_IMPLEMENT(MP_QSTR_protocol_audiosample)
.sample_rate = (audiosample_sample_rate_fun)common_hal_synthio_miditrack_get_sample_rate,
.bits_per_sample = (audiosample_bits_per_sample_fun)common_hal_synthio_miditrack_get_bits_per_sample,
.channel_count = (audiosample_channel_count_fun)common_hal_synthio_miditrack_get_channel_count,
.reset_buffer = (audiosample_reset_buffer_fun)synthio_miditrack_reset_buffer,
.get_buffer = (audiosample_get_buffer_fun)synthio_miditrack_get_buffer,
.get_buffer_structure = (audiosample_get_buffer_structure_fun)synthio_miditrack_get_buffer_structure,
};
const mp_obj_type_t synthio_miditrack_type = {
{ &mp_type_type },
.name = MP_QSTR_MidiTrack,
.flags = MP_TYPE_FLAG_EXTENDED,
.make_new = synthio_miditrack_make_new,
.locals_dict = (mp_obj_dict_t *)&synthio_miditrack_locals_dict,
MP_TYPE_EXTENDED_FIELDS(
.protocol = &synthio_miditrack_proto,
),
};
|
