audiocore: Factor from audioio

When nrf pwm audio is introduced, it will be called `audiopwmio`.  To
enable code sharing with the existing (dac-based) `audioio`, factor
the sample and mixer types to `audiocore`.

INCOMPATIBLE CHANGE: Now, `Mixer`, `RawSample` and `WaveFile` must
be imported from `audiocore`, not `audioio`.

1 files changed, 202 insertions, 0 deletions

diff --git a/shared-bindings/audiocore/WaveFile.c b/shared-bindings/audiocore/WaveFile.c
new file mode 100644
index 000000000..4c1993b7c
--- /dev/null
+++ b/shared-bindings/audiocore/WaveFile.c
@@ -0,0 +1,202 @@
+/*
+ * This file is part of the Micro Python project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2018 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 "lib/utils/context_manager_helpers.h"
+#include "py/objproperty.h"
+#include "py/runtime.h"
+#include "shared-bindings/audiocore/WaveFile.h"
+#include "shared-bindings/util.h"
+#include "supervisor/shared/translate.h"
+
+//| .. currentmodule:: audioio
+//|
+//| :class:`WaveFile` -- Load a wave file for audio playback
+//| ========================================================
+//|
+//| A .wav file prepped for audio playback. Only mono and stereo files are supported. Samples must
+//| be 8 bit unsigned or 16 bit signed.
+//|
+//| .. class:: WaveFile(file)
+//|
+//|   Load a .wav file for playback with `audioio.AudioOut` or `audiobusio.I2SOut`.
+//|
+//|   :param typing.BinaryIO file: Already opened wave file
+//|
+//|   Playing a wave file from flash::
+//|
+//|     import board
+//|     import audioio
+//|     import digitalio
+//|
+//|     # Required for CircuitPlayground Express
+//|     speaker_enable = digitalio.DigitalInOut(board.SPEAKER_ENABLE)
+//|     speaker_enable.switch_to_output(value=True)
+//|
+//|     data = open("cplay-5.1-16bit-16khz.wav", "rb")
+//|     wav = audioio.WaveFile(data)
+//|     a = audioio.AudioOut(board.A0)
+//|
+//|     print("playing")
+//|     a.play(wav)
+//|     while a.playing:
+//|       pass
+//|     print("stopped")
+//|
+STATIC mp_obj_t audioio_wavefile_make_new(const mp_obj_type_t *type, size_t n_args, const mp_obj_t *args, mp_map_t *kw_args) {
+    mp_arg_check_num(n_args, kw_args, 1, 1, false);
+
+    audioio_wavefile_obj_t *self = m_new_obj(audioio_wavefile_obj_t);
+    self->base.type = &audioio_wavefile_type;
+    if (MP_OBJ_IS_TYPE(args[0], &mp_type_fileio)) {
+        common_hal_audioio_wavefile_construct(self, MP_OBJ_TO_PTR(args[0]));
+    } else {
+        mp_raise_TypeError(translate("file must be a file opened in byte mode"));
+    }
+
+    return MP_OBJ_FROM_PTR(self);
+}
+
+//|   .. method:: deinit()
+//|
+//|      Deinitialises the WaveFile and releases all memory resources for reuse.
+//|
+STATIC mp_obj_t audioio_wavefile_deinit(mp_obj_t self_in) {
+    audioio_wavefile_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    common_hal_audioio_wavefile_deinit(self);
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_1(audioio_wavefile_deinit_obj, audioio_wavefile_deinit);
+
+STATIC void check_for_deinit(audioio_wavefile_obj_t *self) {
+    if (common_hal_audioio_wavefile_deinited(self)) {
+        raise_deinited_error();
+    }
+}
+
+//|   .. method:: __enter__()
+//|
+//|      No-op used by Context Managers.
+//|
+//  Provided by context manager helper.
+
+//|   .. method:: __exit__()
+//|
+//|      Automatically deinitializes the hardware when exiting a context. See
+//|      :ref:`lifetime-and-contextmanagers` for more info.
+//|
+STATIC mp_obj_t audioio_wavefile_obj___exit__(size_t n_args, const mp_obj_t *args) {
+    (void)n_args;
+    common_hal_audioio_wavefile_deinit(args[0]);
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(audioio_wavefile___exit___obj, 4, 4, audioio_wavefile_obj___exit__);
+
+//|   .. attribute:: sample_rate
+//|
+//|     32 bit value that dictates how quickly samples are loaded into the DAC
+//|     in Hertz (cycles per second). When the sample is looped, this can change
+//|     the pitch output without changing the underlying sample.
+//|
+STATIC mp_obj_t audioio_wavefile_obj_get_sample_rate(mp_obj_t self_in) {
+    audioio_wavefile_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    check_for_deinit(self);
+    return MP_OBJ_NEW_SMALL_INT(common_hal_audioio_wavefile_get_sample_rate(self));
+}
+MP_DEFINE_CONST_FUN_OBJ_1(audioio_wavefile_get_sample_rate_obj, audioio_wavefile_obj_get_sample_rate);
+
+STATIC mp_obj_t audioio_wavefile_obj_set_sample_rate(mp_obj_t self_in, mp_obj_t sample_rate) {
+    audioio_wavefile_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    check_for_deinit(self);
+    common_hal_audioio_wavefile_set_sample_rate(self, mp_obj_get_int(sample_rate));
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_2(audioio_wavefile_set_sample_rate_obj, audioio_wavefile_obj_set_sample_rate);
+
+const mp_obj_property_t audioio_wavefile_sample_rate_obj = {
+    .base.type = &mp_type_property,
+    .proxy = {(mp_obj_t)&audioio_wavefile_get_sample_rate_obj,
+              (mp_obj_t)&audioio_wavefile_set_sample_rate_obj,
+              (mp_obj_t)&mp_const_none_obj},
+};
+
+//|   .. attribute:: bits_per_sample
+//|
+//|     Bits per sample. (read only)
+//|
+STATIC mp_obj_t audioio_wavefile_obj_get_bits_per_sample(mp_obj_t self_in) {
+    audioio_wavefile_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    check_for_deinit(self);
+    return MP_OBJ_NEW_SMALL_INT(common_hal_audioio_wavefile_get_bits_per_sample(self));
+}
+MP_DEFINE_CONST_FUN_OBJ_1(audioio_wavefile_get_bits_per_sample_obj, audioio_wavefile_obj_get_bits_per_sample);
+
+const mp_obj_property_t audioio_wavefile_bits_per_sample_obj = {
+    .base.type = &mp_type_property,
+    .proxy = {(mp_obj_t)&audioio_wavefile_get_bits_per_sample_obj,
+              (mp_obj_t)&mp_const_none_obj,
+              (mp_obj_t)&mp_const_none_obj},
+};
+
+//|   .. attribute:: channel_count
+//|
+//|     Number of audio channels. (read only)
+//|
+STATIC mp_obj_t audioio_wavefile_obj_get_channel_count(mp_obj_t self_in) {
+    audioio_wavefile_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    check_for_deinit(self);
+    return MP_OBJ_NEW_SMALL_INT(common_hal_audioio_wavefile_get_channel_count(self));
+}
+MP_DEFINE_CONST_FUN_OBJ_1(audioio_wavefile_get_channel_count_obj, audioio_wavefile_obj_get_channel_count);
+
+const mp_obj_property_t audioio_wavefile_channel_count_obj = {
+    .base.type = &mp_type_property,
+    .proxy = {(mp_obj_t)&audioio_wavefile_get_channel_count_obj,
+              (mp_obj_t)&mp_const_none_obj,
+              (mp_obj_t)&mp_const_none_obj},
+};
+
+
+STATIC const mp_rom_map_elem_t audioio_wavefile_locals_dict_table[] = {
+    // Methods
+    { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&audioio_wavefile_deinit_obj) },
+    { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&audioio_wavefile___exit___obj) },
+
+    // Properties
+    { MP_ROM_QSTR(MP_QSTR_sample_rate), MP_ROM_PTR(&audioio_wavefile_sample_rate_obj) },
+    { MP_ROM_QSTR(MP_QSTR_bits_per_sample), MP_ROM_PTR(&audioio_wavefile_bits_per_sample_obj) },
+    { MP_ROM_QSTR(MP_QSTR_channel_count), MP_ROM_PTR(&audioio_wavefile_channel_count_obj) },
+};
+STATIC MP_DEFINE_CONST_DICT(audioio_wavefile_locals_dict, audioio_wavefile_locals_dict_table);
+
+const mp_obj_type_t audioio_wavefile_type = {
+    { &mp_type_type },
+    .name = MP_QSTR_WaveFile,
+    .make_new = audioio_wavefile_make_new,
+    .locals_dict = (mp_obj_dict_t*)&audioio_wavefile_locals_dict,
+};