circuitpython/shared-bindings/audiocore/__init__.c

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/*
* This file is part of the MicroPython 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 "py/obj.h"
#include "py/gc.h"
#include "py/runtime.h"
#include "shared-bindings/audiocore/__init__.h"
#include "shared-bindings/audiocore/RawSample.h"
#include "shared-bindings/audiocore/WaveFile.h"
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// #include "shared-bindings/audiomixer/Mixer.h"
//| """Support for audio samples"""
#if CIRCUITPY_AUDIOCORE_DEBUG
// (no docstrings so that the debug functions are not shown on docs.circuitpython.org)
STATIC mp_obj_t audiocore_get_buffer(mp_obj_t sample_in) {
uint8_t *buffer = NULL;
uint32_t buffer_length = 0;
audioio_get_buffer_result_t gbr = audiosample_get_buffer(sample_in, false, 0, &buffer, &buffer_length);
mp_obj_t result[2] = {mp_obj_new_int_from_uint(gbr), mp_const_none};
if (gbr != GET_BUFFER_ERROR) {
bool single_buffer, samples_signed;
uint32_t max_buffer_length;
uint8_t spacing;
uint8_t bits_per_sample = audiosample_bits_per_sample(sample_in);
audiosample_get_buffer_structure(sample_in, false, &single_buffer, &samples_signed, &max_buffer_length, &spacing);
// copies the data because the gc semantics of get_buffer are unclear
void *result_buf = gc_alloc(buffer_length, 0, false);
memcpy(result_buf, buffer, buffer_length);
char typecode =
(bits_per_sample == 8 && samples_signed) ? 'b' :
(bits_per_sample == 8 && !samples_signed) ? 'B' :
(bits_per_sample == 16 && samples_signed) ? 'h' :
(bits_per_sample == 16 && !samples_signed) ? 'H' :
'b';
size_t nitems = buffer_length / (bits_per_sample / 8);
result[1] = mp_obj_new_memoryview(typecode, nitems, result_buf);
}
return mp_obj_new_tuple(2, result);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(audiocore_get_buffer_obj, audiocore_get_buffer);
STATIC mp_obj_t audiocore_get_structure(mp_obj_t sample_in) {
bool single_buffer, samples_signed;
uint32_t max_buffer_length;
uint8_t spacing;
audiosample_get_buffer_structure(sample_in, false, &single_buffer, &samples_signed, &max_buffer_length, &spacing);
mp_obj_t result[4] = {
mp_obj_new_int_from_uint(single_buffer),
mp_obj_new_int_from_uint(samples_signed),
mp_obj_new_int_from_uint(max_buffer_length),
mp_obj_new_int_from_uint(spacing),
};
return mp_obj_new_tuple(4, result);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(audiocore_get_structure_obj, audiocore_get_structure);
STATIC mp_obj_t audiocore_reset_buffer(mp_obj_t sample_in) {
audiosample_reset_buffer(sample_in, false, 0);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(audiocore_reset_buffer_obj, audiocore_reset_buffer);
#endif
STATIC const mp_rom_map_elem_t audiocore_module_globals_table[] = {
{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_audiocore) },
{ MP_ROM_QSTR(MP_QSTR_RawSample), MP_ROM_PTR(&audioio_rawsample_type) },
{ MP_ROM_QSTR(MP_QSTR_WaveFile), MP_ROM_PTR(&audioio_wavefile_type) },
#if CIRCUITPY_AUDIOCORE_DEBUG
{ MP_ROM_QSTR(MP_QSTR_get_buffer), MP_ROM_PTR(&audiocore_get_buffer_obj) },
{ MP_ROM_QSTR(MP_QSTR_reset_buffer), MP_ROM_PTR(&audiocore_reset_buffer_obj) },
{ MP_ROM_QSTR(MP_QSTR_get_structure), MP_ROM_PTR(&audiocore_get_structure_obj) },
#endif
};
STATIC MP_DEFINE_CONST_DICT(audiocore_module_globals, audiocore_module_globals_table);
const mp_obj_module_t audiocore_module = {
.base = { &mp_type_module },
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.globals = (mp_obj_dict_t *)&audiocore_module_globals,
};
MP_REGISTER_MODULE(MP_QSTR_audiocore, audiocore_module, CIRCUITPY_AUDIOCORE);