285 lines
11 KiB
C
285 lines
11 KiB
C
/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2017 Scott Shawcroft for Adafruit Industries
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdint.h>
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#include "lib/utils/context_manager_helpers.h"
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#include "py/binary.h"
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#include "py/objproperty.h"
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#include "py/runtime.h"
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#include "shared-bindings/microcontroller/Pin.h"
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#include "shared-bindings/audioio/AudioOut.h"
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#include "shared-bindings/audioio/RawSample.h"
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#include "shared-bindings/util.h"
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//| .. currentmodule:: audioio
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//|
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//| :class:`AudioOut` -- Output an analog audio signal
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//| ========================================================
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//|
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//| AudioOut can be used to output an analog audio signal on a given pin.
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//|
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//| .. class:: AudioOut(left_channel, right_channel=None)
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//|
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//| Create a AudioOut object associated with the given pin(s). This allows you to
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//| play audio signals out on the given pin(s).
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//|
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//| :param ~microcontroller.Pin left_channel: The pin to output the left channel to
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//| :param ~microcontroller.Pin right_channel: The pin to output the right channel to
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//|
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//| Simple 8ksps 440 Hz sin wave::
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//|
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//| import audioio
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//| import board
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//| import array
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//| import time
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//| import math
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//|
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//| # Generate one period of sine wav.
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//| length = 8000 // 440
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//| sine_wave = array.array("H", [0] * length)
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//| for i in range(length):
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//| sine_wave[i] = int(math.sin(math.pi * 2 * i / 18) * (2 ** 15) + 2 ** 15)
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//|
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//| dac = audioio.AudioOut(board.SPEAKER)
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//| sine_wave = audioio.RawSample(sine_wave, mono=True, sample_rate=8000)
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//| dac.play(sine_wave, loop=True)
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//| time.sleep(1)
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//| sample.stop()
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//|
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//| Playing a wave file from flash::
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//|
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//| import board
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//| import audioio
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//| import digitalio
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//|
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//| # Required for CircuitPlayground Express
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//| speaker_enable = digitalio.DigitalInOut(board.SPEAKER_ENABLE)
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//| speaker_enable.switch_to_output(value=True)
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//|
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//| data = open("cplay-5.1-16bit-16khz.wav", "rb")
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//| wav = audioio.WaveFile(data)
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//| a = audioio.AudioOut(board.A0)
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//|
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//| print("playing")
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//| a.play(wav)
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//| while a.playing:
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//| pass
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//| print("stopped")
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//|
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STATIC mp_obj_t audioio_audioout_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *pos_args) {
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mp_arg_check_num(n_args, n_kw, 1, 2, true);
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mp_map_t kw_args;
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mp_map_init_fixed_table(&kw_args, n_kw, pos_args + n_args);
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enum { ARG_left_channel, ARG_right_channel };
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static const mp_arg_t allowed_args[] = {
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{ MP_QSTR_left_channel, MP_ARG_OBJ | MP_ARG_REQUIRED },
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{ MP_QSTR_right_channel, MP_ARG_OBJ | MP_ARG_KW_ONLY, {.u_rom_obj = mp_const_none} },
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};
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mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
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mp_arg_parse_all(n_args, pos_args, &kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
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mp_obj_t left_channel_obj = args[ARG_left_channel].u_obj;
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assert_pin(left_channel_obj, false);
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const mcu_pin_obj_t *left_channel_pin = MP_OBJ_TO_PTR(left_channel_obj);
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mp_obj_t right_channel_obj = args[ARG_right_channel].u_obj;
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const mcu_pin_obj_t *right_channel_pin = NULL;
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if (right_channel_obj != mp_const_none) {
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assert_pin(right_channel_obj, false);
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right_channel_pin = MP_OBJ_TO_PTR(right_channel_obj);
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}
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// create AudioOut object from the given pin
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audioio_audioout_obj_t *self = m_new_obj(audioio_audioout_obj_t);
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self->base.type = &audioio_audioout_type;
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common_hal_audioio_audioout_construct(self, left_channel_pin, right_channel_pin);
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return MP_OBJ_FROM_PTR(self);
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}
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//| .. method:: deinit()
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//|
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//| Deinitialises the AudioOut and releases any hardware resources for reuse.
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//|
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STATIC mp_obj_t audioio_audioout_deinit(mp_obj_t self_in) {
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audioio_audioout_obj_t *self = MP_OBJ_TO_PTR(self_in);
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common_hal_audioio_audioout_deinit(self);
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(audioio_audioout_deinit_obj, audioio_audioout_deinit);
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//| .. method:: __enter__()
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//|
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//| No-op used by Context Managers.
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//|
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// Provided by context manager helper.
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//| .. method:: __exit__()
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//|
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//| Automatically deinitializes the hardware when exiting a context. See
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//| :ref:`lifetime-and-contextmanagers` for more info.
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//|
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STATIC mp_obj_t audioio_audioout_obj___exit__(size_t n_args, const mp_obj_t *args) {
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(void)n_args;
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common_hal_audioio_audioout_deinit(args[0]);
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(audioio_audioout___exit___obj, 4, 4, audioio_audioout_obj___exit__);
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//| .. method:: play(sample, *, loop=False)
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//|
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//| Plays the sample once when loop=False and continuously when loop=True.
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//| Does not block. Use `playing` to block.
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//|
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//| Sample must be an `audioio.WaveFile` or `audioio.RawSample`.
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//|
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//| The sample itself should consist of 16 bit samples. Microcontrollers with a lower output
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//| resolution will use the highest order bits to output. For example, the SAMD21 has a 10 bit
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//| DAC that ignores the lowest 6 bits when playing 16 bit samples.
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//|
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STATIC mp_obj_t audioio_audioout_obj_play(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
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enum { ARG_sample, ARG_loop };
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static const mp_arg_t allowed_args[] = {
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{ MP_QSTR_sample, MP_ARG_OBJ | MP_ARG_REQUIRED },
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{ MP_QSTR_loop, MP_ARG_BOOL | MP_ARG_KW_ONLY, {.u_bool = false} },
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};
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audioio_audioout_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]);
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raise_error_if_deinited(common_hal_audioio_audioout_deinited(self));
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mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
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mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
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mp_obj_t sample = args[ARG_sample].u_obj;
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common_hal_audioio_audioout_play(self, sample, args[ARG_loop].u_bool);
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_KW(audioio_audioout_play_obj, 1, audioio_audioout_obj_play);
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//| .. method:: stop()
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//|
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//| Stops playback and resets to the start of the sample.
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//|
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STATIC mp_obj_t audioio_audioout_obj_stop(mp_obj_t self_in) {
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audioio_audioout_obj_t *self = MP_OBJ_TO_PTR(self_in);
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raise_error_if_deinited(common_hal_audioio_audioout_deinited(self));
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common_hal_audioio_audioout_stop(self);
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_1(audioio_audioout_stop_obj, audioio_audioout_obj_stop);
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//| .. attribute:: playing
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//|
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//| True when an audio sample is being output even if `paused`. (read-only)
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//|
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STATIC mp_obj_t audioio_audioout_obj_get_playing(mp_obj_t self_in) {
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audioio_audioout_obj_t *self = MP_OBJ_TO_PTR(self_in);
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raise_error_if_deinited(common_hal_audioio_audioout_deinited(self));
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return mp_obj_new_bool(common_hal_audioio_audioout_get_playing(self));
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}
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MP_DEFINE_CONST_FUN_OBJ_1(audioio_audioout_get_playing_obj, audioio_audioout_obj_get_playing);
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const mp_obj_property_t audioio_audioout_playing_obj = {
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.base.type = &mp_type_property,
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.proxy = {(mp_obj_t)&audioio_audioout_get_playing_obj,
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(mp_obj_t)&mp_const_none_obj,
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(mp_obj_t)&mp_const_none_obj},
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};
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//| .. method:: pause()
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//|
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//| Stops playback temporarily while remembering the position. Use `resume` to resume playback.
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//|
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STATIC mp_obj_t audioio_audioout_obj_pause(mp_obj_t self_in) {
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audioio_audioout_obj_t *self = MP_OBJ_TO_PTR(self_in);
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raise_error_if_deinited(common_hal_audioio_audioout_deinited(self));
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if (!common_hal_audioio_audioout_get_playing(self)) {
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mp_raise_RuntimeError("Not playing");
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}
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common_hal_audioio_audioout_pause(self);
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_1(audioio_audioout_pause_obj, audioio_audioout_obj_pause);
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//| .. method:: resume()
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//|
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//| Resumes sample playback after :py:func:`pause`.
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//|
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STATIC mp_obj_t audioio_audioout_obj_resume(mp_obj_t self_in) {
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audioio_audioout_obj_t *self = MP_OBJ_TO_PTR(self_in);
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raise_error_if_deinited(common_hal_audioio_audioout_deinited(self));
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if (common_hal_audioio_audioout_get_paused(self)) {
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common_hal_audioio_audioout_resume(self);
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}
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_1(audioio_audioout_resume_obj, audioio_audioout_obj_resume);
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//| .. attribute:: paused
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//|
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//| True when playback is paused. (read-only)
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//|
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STATIC mp_obj_t audioio_audioout_obj_get_paused(mp_obj_t self_in) {
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audioio_audioout_obj_t *self = MP_OBJ_TO_PTR(self_in);
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raise_error_if_deinited(common_hal_audioio_audioout_deinited(self));
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return mp_obj_new_bool(common_hal_audioio_audioout_get_paused(self));
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}
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MP_DEFINE_CONST_FUN_OBJ_1(audioio_audioout_get_paused_obj, audioio_audioout_obj_get_paused);
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const mp_obj_property_t audioio_audioout_paused_obj = {
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.base.type = &mp_type_property,
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.proxy = {(mp_obj_t)&audioio_audioout_get_paused_obj,
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(mp_obj_t)&mp_const_none_obj,
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(mp_obj_t)&mp_const_none_obj},
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};
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STATIC const mp_rom_map_elem_t audioio_audioout_locals_dict_table[] = {
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// Methods
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{ MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&audioio_audioout_deinit_obj) },
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{ MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
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{ MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&audioio_audioout___exit___obj) },
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{ MP_ROM_QSTR(MP_QSTR_play), MP_ROM_PTR(&audioio_audioout_play_obj) },
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{ MP_ROM_QSTR(MP_QSTR_stop), MP_ROM_PTR(&audioio_audioout_stop_obj) },
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{ MP_ROM_QSTR(MP_QSTR_pause), MP_ROM_PTR(&audioio_audioout_pause_obj) },
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{ MP_ROM_QSTR(MP_QSTR_resume), MP_ROM_PTR(&audioio_audioout_resume_obj) },
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// Properties
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{ MP_ROM_QSTR(MP_QSTR_playing), MP_ROM_PTR(&audioio_audioout_playing_obj) },
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{ MP_ROM_QSTR(MP_QSTR_paused), MP_ROM_PTR(&audioio_audioout_paused_obj) },
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};
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STATIC MP_DEFINE_CONST_DICT(audioio_audioout_locals_dict, audioio_audioout_locals_dict_table);
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const mp_obj_type_t audioio_audioout_type = {
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{ &mp_type_type },
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.name = MP_QSTR_AudioOut,
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.make_new = audioio_audioout_make_new,
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.locals_dict = (mp_obj_dict_t*)&audioio_audioout_locals_dict,
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};
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