diff options
Diffstat (limited to 'circuitpython/shared-bindings/synthio/MidiTrack.c')
| -rw-r--r-- | circuitpython/shared-bindings/synthio/MidiTrack.c | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/circuitpython/shared-bindings/synthio/MidiTrack.c b/circuitpython/shared-bindings/synthio/MidiTrack.c new file mode 100644 index 0000000..7805c1a --- /dev/null +++ b/circuitpython/shared-bindings/synthio/MidiTrack.c @@ -0,0 +1,168 @@ +/* + * 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, + ), +}; |