add circuitpython code

1 files changed, 190 insertions, 0 deletions

diff --git a/circuitpython/shared-bindings/audiocore/RawSample.c b/circuitpython/shared-bindings/audiocore/RawSample.c
new file mode 100644
index 0000000..82c0245
--- /dev/null
+++ b/circuitpython/shared-bindings/audiocore/RawSample.c
@@ -0,0 +1,190 @@
+/*
+ * 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,
+        ),
+};