/* * This file is part of the Micro Python project, http://micropython.org/ * * The MIT License (MIT) * * Copyright (c) 2017 Scott Shawcroft 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 #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/audiocore/RawSample.h" //| class RawSample: //| """A raw audio sample buffer in memory""" //| //| def __init__( //| self, buffer: ReadableBuffer, *, channel_count: int = 1, sample_rate: int = 8000 //| ) -> None: //| """Create a RawSample based on the given buffer of values. If channel_count is more than //| 1 then each channel's samples should alternate. In other words, for a two channel buffer, the //| first sample will be for channel 1, the second sample will be for channel two, the third for //| channel 1 and so on. //| //| :param ~circuitpython_typing.ReadableBuffer buffer: A buffer with samples //| :param int channel_count: The number of channels in the buffer //| :param int sample_rate: The desired playback sample rate //| //| Simple 8ksps 440 Hz sin wave:: //| //| import audiocore //| import audioio //| import board //| import array //| import time //| import math //| //| # Generate one period of sine wav. //| length = 8000 // 440 //| sine_wave = array.array("h", [0] * length) //| for i in range(length): //| sine_wave[i] = int(math.sin(math.pi * 2 * i / length) * (2 ** 15)) //| //| dac = audioio.AudioOut(board.SPEAKER) //| sine_wave = audiocore.RawSample(sine_wave) //| dac.play(sine_wave, loop=True) //| time.sleep(1) //| dac.stop()""" //| ... STATIC mp_obj_t audioio_rawsample_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_channel_count, ARG_sample_rate }; static const mp_arg_t allowed_args[] = { { MP_QSTR_buffer, MP_ARG_OBJ | MP_ARG_REQUIRED, {.u_obj = MP_OBJ_NULL } }, { MP_QSTR_channel_count, MP_ARG_INT | MP_ARG_KW_ONLY, {.u_int = 1 } }, { MP_QSTR_sample_rate, MP_ARG_INT | MP_ARG_KW_ONLY, {.u_int = 8000} }, }; 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); audioio_rawsample_obj_t *self = mp_obj_malloc(audioio_rawsample_obj_t, &audioio_rawsample_type); mp_buffer_info_t bufinfo; mp_get_buffer_raise(args[ARG_buffer].u_obj, &bufinfo, MP_BUFFER_READ); uint8_t bytes_per_sample = 1; bool signed_samples = bufinfo.typecode == 'b' || bufinfo.typecode == 'h'; if (bufinfo.typecode == 'h' || bufinfo.typecode == 'H') { bytes_per_sample = 2; } else if (bufinfo.typecode != 'b' && bufinfo.typecode != 'B' && bufinfo.typecode != BYTEARRAY_TYPECODE) { mp_raise_ValueError_varg(MP_ERROR_TEXT("%q must be a bytearray or array of type 'h', 'H', 'b', or 'B'"), MP_QSTR_buffer); } common_hal_audioio_rawsample_construct(self, ((uint8_t *)bufinfo.buf), bufinfo.len, bytes_per_sample, signed_samples, args[ARG_channel_count].u_int, args[ARG_sample_rate].u_int); return MP_OBJ_FROM_PTR(self); } //| def deinit(self) -> None: //| """Deinitialises the RawSample and releases any hardware resources for reuse.""" //| ... STATIC mp_obj_t audioio_rawsample_deinit(mp_obj_t self_in) { audioio_rawsample_obj_t *self = MP_OBJ_TO_PTR(self_in); common_hal_audioio_rawsample_deinit(self); return mp_const_none; } STATIC MP_DEFINE_CONST_FUN_OBJ_1(audioio_rawsample_deinit_obj, audioio_rawsample_deinit); STATIC void check_for_deinit(audioio_rawsample_obj_t *self) { if (common_hal_audioio_rawsample_deinited(self)) { raise_deinited_error(); } } //| def __enter__(self) -> RawSample: //| """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 audioio_rawsample_obj___exit__(size_t n_args, const mp_obj_t *args) { (void)n_args; common_hal_audioio_rawsample_deinit(args[0]); return mp_const_none; } STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(audioio_rawsample___exit___obj, 4, 4, audioio_rawsample_obj___exit__); //| sample_rate: Optional[int] //| """32 bit value that dictates how quickly samples are played in Hertz (cycles per second). //| When the sample is looped, this can change the pitch output without changing the underlying //| sample. This will not change the sample rate of any active playback. Call ``play`` again to //| change it.""" //| STATIC mp_obj_t audioio_rawsample_obj_get_sample_rate(mp_obj_t self_in) { audioio_rawsample_obj_t *self = MP_OBJ_TO_PTR(self_in); check_for_deinit(self); return MP_OBJ_NEW_SMALL_INT(common_hal_audioio_rawsample_get_sample_rate(self)); } MP_DEFINE_CONST_FUN_OBJ_1(audioio_rawsample_get_sample_rate_obj, audioio_rawsample_obj_get_sample_rate); STATIC mp_obj_t audioio_rawsample_obj_set_sample_rate(mp_obj_t self_in, mp_obj_t sample_rate) { audioio_rawsample_obj_t *self = MP_OBJ_TO_PTR(self_in); check_for_deinit(self); common_hal_audioio_rawsample_set_sample_rate(self, mp_obj_get_int(sample_rate)); return mp_const_none; } MP_DEFINE_CONST_FUN_OBJ_2(audioio_rawsample_set_sample_rate_obj, audioio_rawsample_obj_set_sample_rate); MP_PROPERTY_GETSET(audioio_rawsample_sample_rate_obj, (mp_obj_t)&audioio_rawsample_get_sample_rate_obj, (mp_obj_t)&audioio_rawsample_set_sample_rate_obj); STATIC const mp_rom_map_elem_t audioio_rawsample_locals_dict_table[] = { // Methods { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&audioio_rawsample_deinit_obj) }, { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) }, { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&audioio_rawsample___exit___obj) }, // Properties { MP_ROM_QSTR(MP_QSTR_sample_rate), MP_ROM_PTR(&audioio_rawsample_sample_rate_obj) }, }; STATIC MP_DEFINE_CONST_DICT(audioio_rawsample_locals_dict, audioio_rawsample_locals_dict_table); STATIC const audiosample_p_t audioio_rawsample_proto = { MP_PROTO_IMPLEMENT(MP_QSTR_protocol_audiosample) .sample_rate = (audiosample_sample_rate_fun)common_hal_audioio_rawsample_get_sample_rate, .bits_per_sample = (audiosample_bits_per_sample_fun)common_hal_audioio_rawsample_get_bits_per_sample, .channel_count = (audiosample_channel_count_fun)common_hal_audioio_rawsample_get_channel_count, .reset_buffer = (audiosample_reset_buffer_fun)audioio_rawsample_reset_buffer, .get_buffer = (audiosample_get_buffer_fun)audioio_rawsample_get_buffer, .get_buffer_structure = (audiosample_get_buffer_structure_fun)audioio_rawsample_get_buffer_structure, }; MP_DEFINE_CONST_OBJ_TYPE( audioio_rawsample_type, MP_QSTR_RawSample, MP_TYPE_FLAG_HAS_SPECIAL_ACCESSORS, make_new, audioio_rawsample_make_new, locals_dict, &audioio_rawsample_locals_dict, protocol, &audioio_rawsample_proto );