278 lines
12 KiB
C
278 lines
12 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 "shared/runtime/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/audiopwmio/PWMAudioOut.h"
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#include "shared-bindings/audiocore/RawSample.h"
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#include "shared-bindings/util.h"
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//| class PWMAudioOut:
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//| """Output an analog audio signal by varying the PWM duty cycle."""
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//|
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//| def __init__(
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//| self,
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//| left_channel: microcontroller.Pin,
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//| *,
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//| right_channel: Optional[microcontroller.Pin] = None,
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//| quiescent_value: int = 0x8000
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//| ) -> None:
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//| """Create a PWMAudioOut object associated with the given pin(s). This allows you to
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//| play audio signals out on the given pin(s). In contrast to mod:`audioio`,
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//| the pin(s) specified are digital pins, and are driven with a device-dependent PWM
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//| signal.
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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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//| :param int quiescent_value: The output value when no signal is present. Samples should start
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//| and end with this value to prevent audible popping.
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//|
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//| **Limitations:** On mimxrt10xx, low sample rates may have an audible
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//| "carrier" frequency. The manufacturer datasheet states that the "MQS" peripheral
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//| is intended for 44 kHz or 48kHz input signals.
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//|
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//| Simple 8ksps 440 Hz sin wave::
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//|
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//| import audiocore
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//| import audiopwmio
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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 / length) * (2 ** 15) + 2 ** 15)
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//|
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//| dac = audiopwmio.PWMAudioOut(board.SPEAKER)
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//| sine_wave = audiocore.RawSample(sine_wave, sample_rate=8000)
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//| dac.play(sine_wave, loop=True)
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//| time.sleep(1)
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//| dac.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 audiocore
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//| import audiopwmio
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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 = audiocore.WaveFile(data)
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//| a = audiopwmio.PWMAudioOut(board.SPEAKER)
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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 audiopwmio_pwmaudioout_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
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enum { ARG_left_channel, ARG_right_channel, ARG_quiescent_value };
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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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{ MP_QSTR_quiescent_value, MP_ARG_INT | MP_ARG_KW_ONLY, {.u_int = 0x8000} },
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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_kw_array(n_args, n_kw, all_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
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const mcu_pin_obj_t *left_channel_pin =
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validate_obj_is_free_pin(args[ARG_left_channel].u_obj, MP_QSTR_left_channel);
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const mcu_pin_obj_t *right_channel_pin =
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validate_obj_is_free_pin_or_none(args[ARG_right_channel].u_obj, MP_QSTR_right_channel);
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// create AudioOut object from the given pin
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// The object is created with a finaliser as some ports use these (rather than 'reset' functions)
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// to ensure resources are collected at interpreter shutdown.
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audiopwmio_pwmaudioout_obj_t *self = m_new_obj_with_finaliser(audiopwmio_pwmaudioout_obj_t);
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self->base.type = &audiopwmio_pwmaudioout_type;
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common_hal_audiopwmio_pwmaudioout_construct(self, left_channel_pin, right_channel_pin, args[ARG_quiescent_value].u_int);
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return MP_OBJ_FROM_PTR(self);
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}
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//| def deinit(self) -> None:
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//| """Deinitialises the PWMAudioOut and releases any hardware resources for reuse."""
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//| ...
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STATIC mp_obj_t audiopwmio_pwmaudioout_deinit(mp_obj_t self_in) {
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audiopwmio_pwmaudioout_obj_t *self = MP_OBJ_TO_PTR(self_in);
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common_hal_audiopwmio_pwmaudioout_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(audiopwmio_pwmaudioout_deinit_obj, audiopwmio_pwmaudioout_deinit);
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STATIC void check_for_deinit(audiopwmio_pwmaudioout_obj_t *self) {
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if (common_hal_audiopwmio_pwmaudioout_deinited(self)) {
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raise_deinited_error();
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}
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}
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//| def __enter__(self) -> PWMAudioOut:
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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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//| def __exit__(self) -> None:
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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 audiopwmio_pwmaudioout_obj___exit__(size_t n_args, const mp_obj_t *args) {
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(void)n_args;
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common_hal_audiopwmio_pwmaudioout_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(audiopwmio_pwmaudioout___exit___obj, 4, 4, audiopwmio_pwmaudioout_obj___exit__);
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//| def play(self, sample: circuitpython_typing.AudioSample, *, loop: bool = False) -> None:
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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 `audiocore.WaveFile`, `audiocore.RawSample`, `audiomixer.Mixer` or `audiomp3.MP3Decoder`.
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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."""
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//| ...
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STATIC mp_obj_t audiopwmio_pwmaudioout_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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audiopwmio_pwmaudioout_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]);
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check_for_deinit(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_audiopwmio_pwmaudioout_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(audiopwmio_pwmaudioout_play_obj, 1, audiopwmio_pwmaudioout_obj_play);
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//| def stop(self) -> None:
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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 audiopwmio_pwmaudioout_obj_stop(mp_obj_t self_in) {
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audiopwmio_pwmaudioout_obj_t *self = MP_OBJ_TO_PTR(self_in);
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check_for_deinit(self);
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common_hal_audiopwmio_pwmaudioout_stop(self);
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_1(audiopwmio_pwmaudioout_stop_obj, audiopwmio_pwmaudioout_obj_stop);
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//| playing: bool
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//| """True when an audio sample is being output even if `paused`. (read-only)"""
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STATIC mp_obj_t audiopwmio_pwmaudioout_obj_get_playing(mp_obj_t self_in) {
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audiopwmio_pwmaudioout_obj_t *self = MP_OBJ_TO_PTR(self_in);
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check_for_deinit(self);
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return mp_obj_new_bool(common_hal_audiopwmio_pwmaudioout_get_playing(self));
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}
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MP_DEFINE_CONST_FUN_OBJ_1(audiopwmio_pwmaudioout_get_playing_obj, audiopwmio_pwmaudioout_obj_get_playing);
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MP_PROPERTY_GETTER(audiopwmio_pwmaudioout_playing_obj,
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(mp_obj_t)&audiopwmio_pwmaudioout_get_playing_obj);
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//| def pause(self) -> None:
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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 audiopwmio_pwmaudioout_obj_pause(mp_obj_t self_in) {
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audiopwmio_pwmaudioout_obj_t *self = MP_OBJ_TO_PTR(self_in);
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check_for_deinit(self);
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if (!common_hal_audiopwmio_pwmaudioout_get_playing(self)) {
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mp_raise_RuntimeError(MP_ERROR_TEXT("Not playing"));
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}
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common_hal_audiopwmio_pwmaudioout_pause(self);
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_1(audiopwmio_pwmaudioout_pause_obj, audiopwmio_pwmaudioout_obj_pause);
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//| def resume(self) -> None:
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//| """Resumes sample playback after :py:func:`pause`."""
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//| ...
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STATIC mp_obj_t audiopwmio_pwmaudioout_obj_resume(mp_obj_t self_in) {
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audiopwmio_pwmaudioout_obj_t *self = MP_OBJ_TO_PTR(self_in);
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check_for_deinit(self);
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if (common_hal_audiopwmio_pwmaudioout_get_paused(self)) {
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common_hal_audiopwmio_pwmaudioout_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(audiopwmio_pwmaudioout_resume_obj, audiopwmio_pwmaudioout_obj_resume);
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//| paused: bool
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//| """True when playback is paused. (read-only)"""
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//|
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STATIC mp_obj_t audiopwmio_pwmaudioout_obj_get_paused(mp_obj_t self_in) {
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audiopwmio_pwmaudioout_obj_t *self = MP_OBJ_TO_PTR(self_in);
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check_for_deinit(self);
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return mp_obj_new_bool(common_hal_audiopwmio_pwmaudioout_get_paused(self));
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}
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MP_DEFINE_CONST_FUN_OBJ_1(audiopwmio_pwmaudioout_get_paused_obj, audiopwmio_pwmaudioout_obj_get_paused);
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MP_PROPERTY_GETTER(audiopwmio_pwmaudioout_paused_obj,
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(mp_obj_t)&audiopwmio_pwmaudioout_get_paused_obj);
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STATIC const mp_rom_map_elem_t audiopwmio_pwmaudioout_locals_dict_table[] = {
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// Methods
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{ MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&audiopwmio_pwmaudioout_deinit_obj) },
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{ MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&audiopwmio_pwmaudioout_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(&audiopwmio_pwmaudioout___exit___obj) },
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{ MP_ROM_QSTR(MP_QSTR_play), MP_ROM_PTR(&audiopwmio_pwmaudioout_play_obj) },
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{ MP_ROM_QSTR(MP_QSTR_stop), MP_ROM_PTR(&audiopwmio_pwmaudioout_stop_obj) },
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{ MP_ROM_QSTR(MP_QSTR_pause), MP_ROM_PTR(&audiopwmio_pwmaudioout_pause_obj) },
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{ MP_ROM_QSTR(MP_QSTR_resume), MP_ROM_PTR(&audiopwmio_pwmaudioout_resume_obj) },
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// Properties
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{ MP_ROM_QSTR(MP_QSTR_playing), MP_ROM_PTR(&audiopwmio_pwmaudioout_playing_obj) },
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{ MP_ROM_QSTR(MP_QSTR_paused), MP_ROM_PTR(&audiopwmio_pwmaudioout_paused_obj) },
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};
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STATIC MP_DEFINE_CONST_DICT(audiopwmio_pwmaudioout_locals_dict, audiopwmio_pwmaudioout_locals_dict_table);
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MP_DEFINE_CONST_OBJ_TYPE(
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audiopwmio_pwmaudioout_type,
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MP_QSTR_PWMAudioOut,
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MP_TYPE_FLAG_HAS_SPECIAL_ACCESSORS,
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make_new, audiopwmio_pwmaudioout_make_new,
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locals_dict, &audiopwmio_pwmaudioout_locals_dict
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);
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