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/*
* 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 <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/audiocore/RawSample.h"
#include "supervisor/shared/translate.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 signed 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 },
{ 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 = m_new_obj(audioio_rawsample_obj_t);
self->base.type = &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(translate("sample_source buffer must be a bytearray or array of type 'h', 'H', 'b' or 'B'"));
}
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,
};
const mp_obj_type_t audioio_rawsample_type = {
{ &mp_type_type },
.name = MP_QSTR_RawSample,
.flags = MP_TYPE_FLAG_EXTENDED,
.make_new = audioio_rawsample_make_new,
.locals_dict = (mp_obj_dict_t *)&audioio_rawsample_locals_dict,
MP_TYPE_EXTENDED_FIELDS(
.protocol = &audioio_rawsample_proto,
),
};
|
