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circuitpython/shared-bindings/audiomixer/Mixer.c

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/*
* 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 "shared-bindings/audiomixer/Mixer.h"
#include "shared-bindings/audiomixer/MixerVoice.h"
#include "shared-module/audiomixer/MixerVoice.h"
#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"
//| class Mixer:
//| """Mixes one or more audio samples together into one sample."""
//|
//| def __init__(
//| self,
//| voice_count: int = 2,
//| buffer_size: int = 1024,
//| channel_count: int = 2,
//| bits_per_sample: int = 16,
//| samples_signed: bool = True,
//| sample_rate: int = 8000,
//| ) -> None:
//| """Create a Mixer object that can mix multiple channels with the same sample rate.
//| Samples are accessed and controlled with the mixer's `audiomixer.MixerVoice` objects.
//|
//| :param int voice_count: The maximum number of voices to mix
//| :param int buffer_size: The total size in bytes of the buffers to mix into
//| :param int channel_count: The number of channels the source samples contain. 1 = mono; 2 = stereo.
//| :param int bits_per_sample: The bits per sample of the samples being played
//| :param bool samples_signed: Samples are signed (True) or unsigned (False)
//| :param int sample_rate: The sample rate to be used for all samples
//|
//| Playing a wave file from flash::
//|
//| import board
//| import audioio
//| import audiocore
//| import audiomixer
//| import digitalio
//|
//| a = audioio.AudioOut(board.A0)
//| music = audiocore.WaveFile(open("cplay-5.1-16bit-16khz.wav", "rb"))
//| drum = audiocore.WaveFile(open("drum.wav", "rb"))
//| mixer = audiomixer.Mixer(voice_count=2, sample_rate=16000, channel_count=1,
//| bits_per_sample=16, samples_signed=True)
//|
//| print("playing")
//| # Have AudioOut play our Mixer source
//| a.play(mixer)
//| # Play the first sample voice
//| mixer.voice[0].play(music)
//| while mixer.playing:
//| # Play the second sample voice
//| mixer.voice[1].play(drum)
//| time.sleep(1)
//| print("stopped")"""
//| ...
STATIC mp_obj_t audiomixer_mixer_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
enum { ARG_voice_count, ARG_buffer_size, ARG_channel_count, ARG_bits_per_sample, ARG_samples_signed, ARG_sample_rate };
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_voice_count, MP_ARG_INT | MP_ARG_KW_ONLY, {.u_int = 2} },
{ MP_QSTR_buffer_size, MP_ARG_INT | MP_ARG_KW_ONLY, {.u_int = 1024} },
{ MP_QSTR_channel_count, MP_ARG_INT | MP_ARG_KW_ONLY, {.u_int = 2} },
{ MP_QSTR_bits_per_sample, MP_ARG_INT | MP_ARG_KW_ONLY, {.u_int = 16} },
{ MP_QSTR_samples_signed, MP_ARG_BOOL | MP_ARG_KW_ONLY, {.u_bool = true} },
{ 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);
mp_int_t voice_count = mp_arg_validate_int_range(args[ARG_voice_count].u_int, 1, 255, MP_QSTR_voice_count);
mp_int_t channel_count = mp_arg_validate_int_range(args[ARG_channel_count].u_int, 1, 2, MP_QSTR_channel_count);
mp_int_t sample_rate = mp_arg_validate_int_min(args[ARG_sample_rate].u_int, 1, MP_QSTR_sample_rate);
mp_int_t bits_per_sample = args[ARG_bits_per_sample].u_int;
if (bits_per_sample != 8 && bits_per_sample != 16) {
mp_raise_ValueError(MP_ERROR_TEXT("bits_per_sample must be 8 or 16"));
}
audiomixer_mixer_obj_t *self =
mp_obj_malloc_var(audiomixer_mixer_obj_t, mp_obj_t, voice_count, &audiomixer_mixer_type);
common_hal_audiomixer_mixer_construct(self, voice_count, args[ARG_buffer_size].u_int, bits_per_sample, args[ARG_samples_signed].u_bool, channel_count, sample_rate);
for (int v = 0; v < voice_count; v++) {
self->voice[v] = MP_OBJ_TYPE_GET_SLOT(&audiomixer_mixervoice_type, make_new)(&audiomixer_mixervoice_type, 0, 0, NULL);
common_hal_audiomixer_mixervoice_set_parent(self->voice[v], self);
}
self->voice_tuple = mp_obj_new_tuple(self->voice_count, self->voice);
return MP_OBJ_FROM_PTR(self);
}
//| def deinit(self) -> None:
//| """Deinitialises the Mixer and releases any hardware resources for reuse."""
//| ...
STATIC mp_obj_t audiomixer_mixer_deinit(mp_obj_t self_in) {
audiomixer_mixer_obj_t *self = MP_OBJ_TO_PTR(self_in);
common_hal_audiomixer_mixer_deinit(self);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(audiomixer_mixer_deinit_obj, audiomixer_mixer_deinit);
STATIC void check_for_deinit(audiomixer_mixer_obj_t *self) {
if (common_hal_audiomixer_mixer_deinited(self)) {
raise_deinited_error();
}
}
//| def __enter__(self) -> Mixer:
//| """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 audiomixer_mixer_obj___exit__(size_t n_args, const mp_obj_t *args) {
(void)n_args;
common_hal_audiomixer_mixer_deinit(args[0]);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(audiomixer_mixer___exit___obj, 4, 4, audiomixer_mixer_obj___exit__);
//| playing: bool
//| """True when any voice is being output. (read-only)"""
STATIC mp_obj_t audiomixer_mixer_obj_get_playing(mp_obj_t self_in) {
audiomixer_mixer_obj_t *self = MP_OBJ_TO_PTR(self_in);
check_for_deinit(self);
return mp_obj_new_bool(common_hal_audiomixer_mixer_get_playing(self));
}
MP_DEFINE_CONST_FUN_OBJ_1(audiomixer_mixer_get_playing_obj, audiomixer_mixer_obj_get_playing);
MP_PROPERTY_GETTER(audiomixer_mixer_playing_obj,
(mp_obj_t)&audiomixer_mixer_get_playing_obj);
//| sample_rate: int
//| """32 bit value that dictates how quickly samples are played in Hertz (cycles per second)."""
STATIC mp_obj_t audiomixer_mixer_obj_get_sample_rate(mp_obj_t self_in) {
audiomixer_mixer_obj_t *self = MP_OBJ_TO_PTR(self_in);
check_for_deinit(self);
return MP_OBJ_NEW_SMALL_INT(common_hal_audiomixer_mixer_get_sample_rate(self));
}
MP_DEFINE_CONST_FUN_OBJ_1(audiomixer_mixer_get_sample_rate_obj, audiomixer_mixer_obj_get_sample_rate);
MP_PROPERTY_GETTER(audiomixer_mixer_sample_rate_obj,
(mp_obj_t)&audiomixer_mixer_get_sample_rate_obj);
//| voice: Tuple[MixerVoice, ...]
//| """A tuple of the mixer's `audiomixer.MixerVoice` object(s).
//|
//| .. code-block:: python
//|
//| >>> mixer.voice
//| (<MixerVoice>,)"""
STATIC mp_obj_t audiomixer_mixer_obj_get_voice(mp_obj_t self_in) {
audiomixer_mixer_obj_t *self = MP_OBJ_TO_PTR(self_in);
check_for_deinit(self);
return self->voice_tuple;
}
MP_DEFINE_CONST_FUN_OBJ_1(audiomixer_mixer_get_voice_obj, audiomixer_mixer_obj_get_voice);
MP_PROPERTY_GETTER(audiomixer_mixer_voice_obj,
(mp_obj_t)&audiomixer_mixer_get_voice_obj);
//| def play(
//| self, sample: circuitpython_typing.AudioSample, *, voice: int = 0, loop: bool = False
//| ) -> None:
//| """Plays the sample once when loop=False and continuously when loop=True.
//| Does not block. Use `playing` to block.
//|
//| Sample must be an `audiocore.WaveFile`, `audiocore.RawSample`, `audiomixer.Mixer` or `audiomp3.MP3Decoder`.
//|
//| The sample must match the Mixer's encoding settings given in the constructor."""
//| ...
STATIC mp_obj_t audiomixer_mixer_obj_play(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
enum { ARG_sample, ARG_voice, ARG_loop };
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_sample, MP_ARG_OBJ | MP_ARG_REQUIRED, {} },
{ MP_QSTR_voice, MP_ARG_INT | MP_ARG_KW_ONLY, {.u_int = 0} },
{ MP_QSTR_loop, MP_ARG_BOOL | MP_ARG_KW_ONLY, {.u_bool = false} },
};
audiomixer_mixer_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]);
check_for_deinit(self);
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
uint8_t v = args[ARG_voice].u_int;
if (v > (self->voice_count - 1)) {
mp_arg_error_invalid(MP_QSTR_voice);
}
audiomixer_mixervoice_obj_t *voice = MP_OBJ_TO_PTR(self->voice[v]);
mp_obj_t sample = args[ARG_sample].u_obj;
common_hal_audiomixer_mixervoice_play(voice, sample, args[ARG_loop].u_bool);
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_KW(audiomixer_mixer_play_obj, 1, audiomixer_mixer_obj_play);
//| def stop_voice(self, voice: int = 0) -> None:
//| """Stops playback of the sample on the given voice."""
//| ...
//|
STATIC mp_obj_t audiomixer_mixer_obj_stop_voice(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
enum { ARG_voice };
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_voice, MP_ARG_INT, {.u_int = 0} },
};
audiomixer_mixer_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]);
check_for_deinit(self);
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
uint8_t v = args[ARG_voice].u_int;
if (v > (self->voice_count - 1)) {
mp_arg_error_invalid(MP_QSTR_voice);
}
audiomixer_mixervoice_obj_t *voice = MP_OBJ_TO_PTR(self->voice[v]);
common_hal_audiomixer_mixervoice_stop(voice);
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_KW(audiomixer_mixer_stop_voice_obj, 1, audiomixer_mixer_obj_stop_voice);
STATIC const mp_rom_map_elem_t audiomixer_mixer_locals_dict_table[] = {
// Methods
{ MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&audiomixer_mixer_deinit_obj) },
{ MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
{ MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&audiomixer_mixer___exit___obj) },
{ MP_ROM_QSTR(MP_QSTR_play), MP_ROM_PTR(&audiomixer_mixer_play_obj) },
{ MP_ROM_QSTR(MP_QSTR_stop_voice), MP_ROM_PTR(&audiomixer_mixer_stop_voice_obj) },
// Properties
{ MP_ROM_QSTR(MP_QSTR_playing), MP_ROM_PTR(&audiomixer_mixer_playing_obj) },
{ MP_ROM_QSTR(MP_QSTR_sample_rate), MP_ROM_PTR(&audiomixer_mixer_sample_rate_obj) },
{ MP_ROM_QSTR(MP_QSTR_voice), MP_ROM_PTR(&audiomixer_mixer_voice_obj) }
};
STATIC MP_DEFINE_CONST_DICT(audiomixer_mixer_locals_dict, audiomixer_mixer_locals_dict_table);
STATIC const audiosample_p_t audiomixer_mixer_proto = {
MP_PROTO_IMPLEMENT(MP_QSTR_protocol_audiosample)
.sample_rate = (audiosample_sample_rate_fun)common_hal_audiomixer_mixer_get_sample_rate,
.bits_per_sample = (audiosample_bits_per_sample_fun)common_hal_audiomixer_mixer_get_bits_per_sample,
.channel_count = (audiosample_channel_count_fun)common_hal_audiomixer_mixer_get_channel_count,
.reset_buffer = (audiosample_reset_buffer_fun)audiomixer_mixer_reset_buffer,
.get_buffer = (audiosample_get_buffer_fun)audiomixer_mixer_get_buffer,
.get_buffer_structure = (audiosample_get_buffer_structure_fun)audiomixer_mixer_get_buffer_structure,
};
MP_DEFINE_CONST_OBJ_TYPE(
audiomixer_mixer_type,
MP_QSTR_Mixer,
MP_TYPE_FLAG_HAS_SPECIAL_ACCESSORS,
make_new, audiomixer_mixer_make_new,
locals_dict, &audiomixer_mixer_locals_dict,
protocol, &audiomixer_mixer_proto
);
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