/* * 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 #include "lib/utils/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 ~_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, const mp_obj_t *pos_args, mp_map_t *kw_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(n_args, pos_args, kw_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); const mp_obj_property_t synthio_miditrack_sample_rate_obj = { .base.type = &mp_type_property, .proxy = {(mp_obj_t)&synthio_miditrack_get_sample_rate_obj, MP_ROM_NONE, MP_ROM_NONE}, }; 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, ), };