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[speaker, i2s_audio] I2S Speaker implementation using a ring buffer (#7605)

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This commit is contained in:
Kevin Ahrendt
2024-10-16 18:47:11 -04:00
committed by GitHub
parent 22478ffb0f
commit 1c845e0ff8
13 changed files with 601 additions and 266 deletions
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9
esphome/components/audio/__init__.py Normal file
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@@ -0,0 +1,9 @@
import esphome.codegen as cg
import esphome.config_validation as cv
CODEOWNERS = ["@kahrendt"]
audio_ns = cg.esphome_ns.namespace("audio")
CONFIG_SCHEMA = cv.All(
cv.Schema({}),
)

21
esphome/components/audio/audio.h Normal file
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@@ -0,0 +1,21 @@
#pragma once
#include <cstdint>
#include <stddef.h>
namespace esphome {
namespace audio {
struct AudioStreamInfo {
bool operator==(const AudioStreamInfo &rhs) const {
return (channels == rhs.channels) && (bits_per_sample == rhs.bits_per_sample) && (sample_rate == rhs.sample_rate);
}
bool operator!=(const AudioStreamInfo &rhs) const { return !operator==(rhs); }
size_t get_bytes_per_sample() const { return bits_per_sample / 8; }
uint8_t channels = 1;
uint8_t bits_per_sample = 16;
uint32_t sample_rate = 16000;
};
} // namespace audio
} // namespace esphome

3
esphome/components/i2s_audio/speaker/__init__.py
View File

@@ -16,6 +16,7 @@ from .. import (
register_i2s_audio_component,
)
AUTO_LOAD = ["audio"]
CODEOWNERS = ["@jesserockz"]
DEPENDENCIES = ["i2s_audio"]
@@ -72,7 +73,7 @@ BASE_SCHEMA = (
.extend(
{
cv.Optional(
CONF_TIMEOUT, default="100ms"
CONF_TIMEOUT, default="500ms"
): cv.positive_time_period_milliseconds,
}
)

651
esphome/components/i2s_audio/speaker/i2s_audio_speaker.cpp
View File

@@ -4,6 +4,8 @@
#include <driver/i2s.h>
#include "esphome/components/audio/audio.h"
#include "esphome/core/application.h"
#include "esphome/core/hal.h"
#include "esphome/core/log.h"
@@ -11,186 +13,296 @@
namespace esphome {
namespace i2s_audio {
static const size_t BUFFER_COUNT = 20;
static const size_t DMA_BUFFER_SIZE = 512;
static const size_t DMA_BUFFERS_COUNT = 4;
static const size_t FRAMES_IN_ALL_DMA_BUFFERS = DMA_BUFFER_SIZE * DMA_BUFFERS_COUNT;
static const size_t RING_BUFFER_SAMPLES = 8192;
static const size_t TASK_DELAY_MS = 10;
static const size_t TASK_STACK_SIZE = 4096;
static const ssize_t TASK_PRIORITY = 23;
static const char *const TAG = "i2s_audio.speaker";
enum SpeakerEventGroupBits : uint32_t {
COMMAND_START = (1 << 0), // Starts the main task purpose
COMMAND_STOP = (1 << 1), // stops the main task
COMMAND_STOP_GRACEFULLY = (1 << 2), // Stops the task once all data has been written
MESSAGE_RING_BUFFER_AVAILABLE_TO_WRITE = (1 << 5), // Locks the ring buffer when not set
STATE_STARTING = (1 << 10),
STATE_RUNNING = (1 << 11),
STATE_STOPPING = (1 << 12),
STATE_STOPPED = (1 << 13),
ERR_TASK_FAILED_TO_START = (1 << 15),
ERR_ESP_INVALID_STATE = (1 << 16),
ERR_ESP_INVALID_ARG = (1 << 17),
ERR_ESP_INVALID_SIZE = (1 << 18),
ERR_ESP_NO_MEM = (1 << 19),
ERR_ESP_FAIL = (1 << 20),
ALL_ERR_ESP_BITS = ERR_ESP_INVALID_STATE | ERR_ESP_INVALID_ARG | ERR_ESP_INVALID_SIZE | ERR_ESP_NO_MEM | ERR_ESP_FAIL,
ALL_BITS = 0x00FFFFFF, // All valid FreeRTOS event group bits
};
// Translates a SpeakerEventGroupBits ERR_ESP bit to the coressponding esp_err_t
static esp_err_t err_bit_to_esp_err(uint32_t bit) {
switch (bit) {
case SpeakerEventGroupBits::ERR_ESP_INVALID_STATE:
return ESP_ERR_INVALID_STATE;
case SpeakerEventGroupBits::ERR_ESP_INVALID_ARG:
return ESP_ERR_INVALID_ARG;
case SpeakerEventGroupBits::ERR_ESP_INVALID_SIZE:
return ESP_ERR_INVALID_SIZE;
case SpeakerEventGroupBits::ERR_ESP_NO_MEM:
return ESP_ERR_NO_MEM;
default:
return ESP_FAIL;
}
}
/// @brief Multiplies the input array of Q15 numbers by a Q15 constant factor
///
/// Based on `dsps_mulc_s16_ansi` from the esp-dsp library:
/// https://github.com/espressif/esp-dsp/blob/master/modules/math/mulc/fixed/dsps_mulc_s16_ansi.c
/// (accessed on 2024-09-30).
/// @param input Array of Q15 numbers
/// @param output Array of Q15 numbers
/// @param len Length of array
/// @param c Q15 constant factor
static void q15_multiplication(const int16_t *input, int16_t *output, size_t len, int16_t c) {
for (int i = 0; i < len; i++) {
int32_t acc = (int32_t) input[i] * (int32_t) c;
output[i] = (int16_t) (acc >> 15);
}
}
// Lists the Q15 fixed point scaling factor for volume reduction.
// Has 100 values representing silence and a reduction [49, 48.5, ... 0.5, 0] dB.
// dB to PCM scaling factor formula: floating_point_scale_factor = 2^(-db/6.014)
// float to Q15 fixed point formula: q15_scale_factor = floating_point_scale_factor * 2^(15)
static const std::vector<int16_t> Q15_VOLUME_SCALING_FACTORS = {
0, 116, 122, 130, 137, 146, 154, 163, 173, 183, 194, 206, 218, 231, 244,
259, 274, 291, 308, 326, 345, 366, 388, 411, 435, 461, 488, 517, 548, 580,
615, 651, 690, 731, 774, 820, 868, 920, 974, 1032, 1094, 1158, 1227, 1300, 1377,
1459, 1545, 1637, 1734, 1837, 1946, 2061, 2184, 2313, 2450, 2596, 2750, 2913, 3085, 3269,
3462, 3668, 3885, 4116, 4360, 4619, 4893, 5183, 5490, 5816, 6161, 6527, 6914, 7324, 7758,
8218, 8706, 9222, 9770, 10349, 10963, 11613, 12302, 13032, 13805, 14624, 15491, 16410, 17384, 18415,
19508, 20665, 21891, 23189, 24565, 26022, 27566, 29201, 30933, 32767};
void I2SAudioSpeaker::setup() {
ESP_LOGCONFIG(TAG, "Setting up I2S Audio Speaker...");
this->buffer_queue_ = xQueueCreate(BUFFER_COUNT, sizeof(DataEvent));
if (this->buffer_queue_ == nullptr) {
ESP_LOGE(TAG, "Failed to create buffer queue");
this->mark_failed();
return;
if (this->event_group_ == nullptr) {
this->event_group_ = xEventGroupCreate();
}
this->event_queue_ = xQueueCreate(BUFFER_COUNT, sizeof(TaskEvent));
if (this->event_queue_ == nullptr) {
ESP_LOGE(TAG, "Failed to create event queue");
if (this->event_group_ == nullptr) {
ESP_LOGE(TAG, "Failed to create event group");
this->mark_failed();
return;
}
}
void I2SAudioSpeaker::loop() {
uint32_t event_group_bits = xEventGroupGetBits(this->event_group_);
if (event_group_bits & SpeakerEventGroupBits::ERR_TASK_FAILED_TO_START) {
this->status_set_error("Failed to start speaker task");
}
if (event_group_bits & SpeakerEventGroupBits::ALL_ERR_ESP_BITS) {
uint32_t error_bits = event_group_bits & SpeakerEventGroupBits::ALL_ERR_ESP_BITS;
ESP_LOGW(TAG, "Error writing to I2S: %s", esp_err_to_name(err_bit_to_esp_err(error_bits)));
this->status_set_warning();
}
if (event_group_bits & SpeakerEventGroupBits::STATE_STARTING) {
ESP_LOGD(TAG, "Starting Speaker");
this->state_ = speaker::STATE_STARTING;
xEventGroupClearBits(this->event_group_, SpeakerEventGroupBits::STATE_STARTING);
}
if (event_group_bits & SpeakerEventGroupBits::STATE_RUNNING) {
ESP_LOGD(TAG, "Started Speaker");
this->state_ = speaker::STATE_RUNNING;
xEventGroupClearBits(this->event_group_, SpeakerEventGroupBits::STATE_RUNNING);
this->status_clear_warning();
this->status_clear_error();
}
if (event_group_bits & SpeakerEventGroupBits::STATE_STOPPING) {
ESP_LOGD(TAG, "Stopping Speaker");
this->state_ = speaker::STATE_STOPPING;
xEventGroupClearBits(this->event_group_, SpeakerEventGroupBits::STATE_STOPPING);
}
if (event_group_bits & SpeakerEventGroupBits::STATE_STOPPED) {
if (!this->task_created_) {
ESP_LOGD(TAG, "Stopped Speaker");
this->state_ = speaker::STATE_STOPPED;
xEventGroupClearBits(this->event_group_, SpeakerEventGroupBits::ALL_BITS);
this->speaker_task_handle_ = nullptr;
}
}
}
void I2SAudioSpeaker::set_volume(float volume) {
this->volume_ = volume;
ssize_t decibel_index = remap<ssize_t, float>(volume, 0.0f, 1.0f, 0, Q15_VOLUME_SCALING_FACTORS.size() - 1);
this->q15_volume_factor_ = Q15_VOLUME_SCALING_FACTORS[decibel_index];
}
size_t I2SAudioSpeaker::play(const uint8_t *data, size_t length, TickType_t ticks_to_wait) {
if (this->is_failed()) {
ESP_LOGE(TAG, "Cannot play audio, speaker failed to setup");
return 0;
}
if (this->state_ != speaker::STATE_RUNNING && this->state_ != speaker::STATE_STARTING) {
this->start();
}
// Wait for the ring buffer to be available
uint32_t event_bits =
xEventGroupWaitBits(this->event_group_, SpeakerEventGroupBits::MESSAGE_RING_BUFFER_AVAILABLE_TO_WRITE, pdFALSE,
pdFALSE, pdMS_TO_TICKS(TASK_DELAY_MS));
if (event_bits & SpeakerEventGroupBits::MESSAGE_RING_BUFFER_AVAILABLE_TO_WRITE) {
// Ring buffer is available to write
// Lock the ring buffer, write to it, then unlock it
xEventGroupClearBits(this->event_group_, SpeakerEventGroupBits::MESSAGE_RING_BUFFER_AVAILABLE_TO_WRITE);
size_t bytes_written = this->audio_ring_buffer_->write_without_replacement((void *) data, length, ticks_to_wait);
xEventGroupSetBits(this->event_group_, SpeakerEventGroupBits::MESSAGE_RING_BUFFER_AVAILABLE_TO_WRITE);
return bytes_written;
}
return 0;
}
bool I2SAudioSpeaker::has_buffered_data() const {
if (this->audio_ring_buffer_ != nullptr) {
return this->audio_ring_buffer_->available() > 0;
}
return false;
}
void I2SAudioSpeaker::speaker_task(void *params) {
I2SAudioSpeaker *this_speaker = (I2SAudioSpeaker *) params;
uint32_t event_group_bits =
xEventGroupWaitBits(this_speaker->event_group_,
SpeakerEventGroupBits::COMMAND_START | SpeakerEventGroupBits::COMMAND_STOP |
SpeakerEventGroupBits::COMMAND_STOP_GRACEFULLY, // Bit message to read
pdTRUE, // Clear the bits on exit
pdFALSE, // Don't wait for all the bits,
portMAX_DELAY); // Block indefinitely until a bit is set
if (event_group_bits & (SpeakerEventGroupBits::COMMAND_STOP | SpeakerEventGroupBits::COMMAND_STOP_GRACEFULLY)) {
// Received a stop signal before the task was requested to start
this_speaker->delete_task_(0);
}
xEventGroupSetBits(this_speaker->event_group_, SpeakerEventGroupBits::STATE_STARTING);
audio::AudioStreamInfo audio_stream_info = this_speaker->audio_stream_info_;
const ssize_t bytes_per_sample = audio_stream_info.get_bytes_per_sample();
const uint8_t number_of_channels = audio_stream_info.channels;
const size_t dma_buffers_size = FRAMES_IN_ALL_DMA_BUFFERS * bytes_per_sample * number_of_channels;
if (this_speaker->send_esp_err_to_event_group_(
this_speaker->allocate_buffers_(dma_buffers_size, RING_BUFFER_SAMPLES * bytes_per_sample))) {
// Failed to allocate buffers
xEventGroupSetBits(this_speaker->event_group_, SpeakerEventGroupBits::ERR_ESP_NO_MEM);
this_speaker->delete_task_(dma_buffers_size);
}
if (this_speaker->send_esp_err_to_event_group_(this_speaker->start_i2s_driver_())) {
// Failed to start I2S driver
this_speaker->delete_task_(dma_buffers_size);
} else {
// Ring buffer is allocated, so indicate its can be written to
xEventGroupSetBits(this_speaker->event_group_, SpeakerEventGroupBits::MESSAGE_RING_BUFFER_AVAILABLE_TO_WRITE);
}
if (!this_speaker->send_esp_err_to_event_group_(this_speaker->reconfigure_i2s_stream_info_(audio_stream_info))) {
// Successfully set the I2S stream info, ready to write audio data to the I2S port
xEventGroupSetBits(this_speaker->event_group_, SpeakerEventGroupBits::STATE_RUNNING);
bool stop_gracefully = false;
uint32_t last_data_received_time = millis();
while ((millis() - last_data_received_time) <= this_speaker->timeout_) {
event_group_bits = xEventGroupGetBits(this_speaker->event_group_);
if (event_group_bits & SpeakerEventGroupBits::COMMAND_STOP) {
break;
}
if (event_group_bits & SpeakerEventGroupBits::COMMAND_STOP_GRACEFULLY) {
stop_gracefully = true;
}
size_t bytes_to_read = dma_buffers_size;
size_t bytes_read = this_speaker->audio_ring_buffer_->read((void *) this_speaker->data_buffer_, bytes_to_read,
pdMS_TO_TICKS(TASK_DELAY_MS));
if (bytes_read > 0) {
last_data_received_time = millis();
size_t bytes_written = 0;
if ((audio_stream_info.bits_per_sample == 16) && (this_speaker->q15_volume_factor_ < INT16_MAX)) {
// Scale samples by the volume factor in place
q15_multiplication((int16_t *) this_speaker->data_buffer_, (int16_t *) this_speaker->data_buffer_,
bytes_read / sizeof(int16_t), this_speaker->q15_volume_factor_);
}
if (audio_stream_info.bits_per_sample == (uint8_t) this_speaker->bits_per_sample_) {
i2s_write(this_speaker->parent_->get_port(), this_speaker->data_buffer_, bytes_read, &bytes_written,
portMAX_DELAY);
} else if (audio_stream_info.bits_per_sample < (uint8_t) this_speaker->bits_per_sample_) {
i2s_write_expand(this_speaker->parent_->get_port(), this_speaker->data_buffer_, bytes_read,
audio_stream_info.bits_per_sample, this_speaker->bits_per_sample_, &bytes_written,
portMAX_DELAY);
}
if (bytes_written != bytes_read) {
xEventGroupSetBits(this_speaker->event_group_, SpeakerEventGroupBits::ERR_ESP_INVALID_SIZE);
}
} else {
// No data received
if (stop_gracefully) {
break;
}
i2s_zero_dma_buffer(this_speaker->parent_->get_port());
}
}
}
i2s_zero_dma_buffer(this_speaker->parent_->get_port());
xEventGroupSetBits(this_speaker->event_group_, SpeakerEventGroupBits::STATE_STOPPING);
i2s_stop(this_speaker->parent_->get_port());
i2s_driver_uninstall(this_speaker->parent_->get_port());
this_speaker->parent_->unlock();
this_speaker->delete_task_(dma_buffers_size);
}
void I2SAudioSpeaker::start() {
if (this->is_failed()) {
ESP_LOGE(TAG, "Cannot start audio, speaker failed to setup");
if (this->is_failed())
return;
}
if (this->task_created_) {
ESP_LOGW(TAG, "Called start while task has been already created.");
if ((this->state_ == speaker::STATE_STARTING) || (this->state_ == speaker::STATE_RUNNING))
return;
}
this->state_ = speaker::STATE_STARTING;
}
void I2SAudioSpeaker::start_() {
if (this->task_created_) {
return;
}
if (!this->parent_->try_lock()) {
return; // Waiting for another i2s component to return lock
if (this->speaker_task_handle_ == nullptr) {
xTaskCreate(I2SAudioSpeaker::speaker_task, "speaker_task", TASK_STACK_SIZE, (void *) this, TASK_PRIORITY,
&this->speaker_task_handle_);
}
xTaskCreate(I2SAudioSpeaker::player_task, "speaker_task", 8192, (void *) this, 1, &this->player_task_handle_);
this->task_created_ = true;
}
template<typename a, typename b> const uint8_t *convert_data_format(const a *from, b *to, size_t &bytes, bool repeat) {
if (sizeof(a) == sizeof(b) && !repeat) {
return reinterpret_cast<const uint8_t *>(from);
}
const b *result = to;
for (size_t i = 0; i < bytes; i += sizeof(a)) {
b value = static_cast<b>(*from++) << (sizeof(b) - sizeof(a)) * 8;
*to++ = value;
if (repeat)
*to++ = value;
}
bytes *= (sizeof(b) / sizeof(a)) * (repeat ? 2 : 1); // NOLINT
return reinterpret_cast<const uint8_t *>(result);
}
void I2SAudioSpeaker::player_task(void *params) {
I2SAudioSpeaker *this_speaker = (I2SAudioSpeaker *) params;
TaskEvent event;
event.type = TaskEventType::STARTING;
xQueueSend(this_speaker->event_queue_, &event, portMAX_DELAY);
i2s_driver_config_t config = {
.mode = (i2s_mode_t) (this_speaker->i2s_mode_ | I2S_MODE_TX),
.sample_rate = this_speaker->sample_rate_,
.bits_per_sample = this_speaker->bits_per_sample_,
.channel_format = this_speaker->channel_,
.communication_format = this_speaker->i2s_comm_fmt_,
.intr_alloc_flags = ESP_INTR_FLAG_LEVEL1,
.dma_buf_count = 8,
.dma_buf_len = 256,
.use_apll = this_speaker->use_apll_,
.tx_desc_auto_clear = true,
.fixed_mclk = 0,
.mclk_multiple = I2S_MCLK_MULTIPLE_256,
.bits_per_chan = this_speaker->bits_per_channel_,
};
#if SOC_I2S_SUPPORTS_DAC
if (this_speaker->internal_dac_mode_ != I2S_DAC_CHANNEL_DISABLE) {
config.mode = (i2s_mode_t) (config.mode | I2S_MODE_DAC_BUILT_IN);
}
#endif
esp_err_t err = i2s_driver_install(this_speaker->parent_->get_port(), &config, 0, nullptr);
if (err != ESP_OK) {
event.type = TaskEventType::WARNING;
event.err = err;
xQueueSend(this_speaker->event_queue_, &event, 0);
event.type = TaskEventType::STOPPED;
xQueueSend(this_speaker->event_queue_, &event, 0);
while (true) {
delay(10);
}
}
#if SOC_I2S_SUPPORTS_DAC
if (this_speaker->internal_dac_mode_ == I2S_DAC_CHANNEL_DISABLE) {
#endif
i2s_pin_config_t pin_config = this_speaker->parent_->get_pin_config();
pin_config.data_out_num = this_speaker->dout_pin_;
i2s_set_pin(this_speaker->parent_->get_port(), &pin_config);
#if SOC_I2S_SUPPORTS_DAC
if (this->speaker_task_handle_ != nullptr) {
xEventGroupSetBits(this->event_group_, SpeakerEventGroupBits::COMMAND_START);
this->task_created_ = true;
} else {
i2s_set_dac_mode(this_speaker->internal_dac_mode_);
}
#endif
DataEvent data_event;
event.type = TaskEventType::STARTED;
xQueueSend(this_speaker->event_queue_, &event, portMAX_DELAY);
int32_t buffer[BUFFER_SIZE];
while (true) {
if (xQueueReceive(this_speaker->buffer_queue_, &data_event, this_speaker->timeout_ / portTICK_PERIOD_MS) !=
pdTRUE) {
break; // End of audio from main thread
}
if (data_event.stop) {
// Stop signal from main thread
xQueueReset(this_speaker->buffer_queue_); // Flush queue
break;
}
const uint8_t *data = data_event.data;
size_t remaining = data_event.len;
switch (this_speaker->bits_per_sample_) {
case I2S_BITS_PER_SAMPLE_8BIT:
case I2S_BITS_PER_SAMPLE_16BIT: {
data = convert_data_format(reinterpret_cast<const int16_t *>(data), reinterpret_cast<int16_t *>(buffer),
remaining, this_speaker->channel_ == I2S_CHANNEL_FMT_ALL_LEFT);
break;
}
case I2S_BITS_PER_SAMPLE_24BIT:
case I2S_BITS_PER_SAMPLE_32BIT: {
data = convert_data_format(reinterpret_cast<const int16_t *>(data), reinterpret_cast<int32_t *>(buffer),
remaining, this_speaker->channel_ == I2S_CHANNEL_FMT_ALL_LEFT);
break;
}
}
while (remaining != 0) {
size_t bytes_written;
esp_err_t err =
i2s_write(this_speaker->parent_->get_port(), data, remaining, &bytes_written, (32 / portTICK_PERIOD_MS));
if (err != ESP_OK) {
event = {.type = TaskEventType::WARNING, .err = err};
if (xQueueSend(this_speaker->event_queue_, &event, 10 / portTICK_PERIOD_MS) != pdTRUE) {
ESP_LOGW(TAG, "Failed to send WARNING event");
}
continue;
}
data += bytes_written;
remaining -= bytes_written;
}
}
event.type = TaskEventType::STOPPING;
if (xQueueSend(this_speaker->event_queue_, &event, 10 / portTICK_PERIOD_MS) != pdTRUE) {
ESP_LOGW(TAG, "Failed to send STOPPING event");
}
i2s_zero_dma_buffer(this_speaker->parent_->get_port());
i2s_driver_uninstall(this_speaker->parent_->get_port());
event.type = TaskEventType::STOPPED;
if (xQueueSend(this_speaker->event_queue_, &event, 10 / portTICK_PERIOD_MS) != pdTRUE) {
ESP_LOGW(TAG, "Failed to send STOPPED event");
}
while (true) {
delay(10);
xEventGroupSetBits(this->event_group_, SpeakerEventGroupBits::ERR_TASK_FAILED_TO_START);
}
}
@@ -203,92 +315,169 @@ void I2SAudioSpeaker::stop_(bool wait_on_empty) {
return;
if (this->state_ == speaker::STATE_STOPPED)
return;
if (this->state_ == speaker::STATE_STARTING) {
this->state_ = speaker::STATE_STOPPED;
return;
}
this->state_ = speaker::STATE_STOPPING;
DataEvent data;
data.stop = true;
if (wait_on_empty) {
xQueueSend(this->buffer_queue_, &data, portMAX_DELAY);
xEventGroupSetBits(this->event_group_, SpeakerEventGroupBits::COMMAND_STOP_GRACEFULLY);
} else {
xQueueSendToFront(this->buffer_queue_, &data, portMAX_DELAY);
xEventGroupSetBits(this->event_group_, SpeakerEventGroupBits::COMMAND_STOP);
}
}
void I2SAudioSpeaker::watch_() {
TaskEvent event;
if (xQueueReceive(this->event_queue_, &event, 0) == pdTRUE) {
switch (event.type) {
case TaskEventType::STARTING:
ESP_LOGD(TAG, "Starting I2S Audio Speaker");
break;
case TaskEventType::STARTED:
ESP_LOGD(TAG, "Started I2S Audio Speaker");
this->state_ = speaker::STATE_RUNNING;
this->status_clear_warning();
break;
case TaskEventType::STOPPING:
ESP_LOGD(TAG, "Stopping I2S Audio Speaker");
break;
case TaskEventType::STOPPED:
this->state_ = speaker::STATE_STOPPED;
vTaskDelete(this->player_task_handle_);
this->task_created_ = false;
this->player_task_handle_ = nullptr;
this->parent_->unlock();
xQueueReset(this->buffer_queue_);
ESP_LOGD(TAG, "Stopped I2S Audio Speaker");
break;
case TaskEventType::WARNING:
ESP_LOGW(TAG, "Error writing to I2S: %s", esp_err_to_name(event.err));
this->status_set_warning();
break;
}
bool I2SAudioSpeaker::send_esp_err_to_event_group_(esp_err_t err) {
switch (err) {
case ESP_OK:
return false;
case ESP_ERR_INVALID_STATE:
xEventGroupSetBits(this->event_group_, SpeakerEventGroupBits::ERR_ESP_INVALID_STATE);
return true;
case ESP_ERR_INVALID_ARG:
xEventGroupSetBits(this->event_group_, SpeakerEventGroupBits::ERR_ESP_INVALID_ARG);
return true;
case ESP_ERR_INVALID_SIZE:
xEventGroupSetBits(this->event_group_, SpeakerEventGroupBits::ERR_ESP_INVALID_SIZE);
return true;
case ESP_ERR_NO_MEM:
xEventGroupSetBits(this->event_group_, SpeakerEventGroupBits::ERR_ESP_NO_MEM);
return true;
default:
xEventGroupSetBits(this->event_group_, SpeakerEventGroupBits::ERR_ESP_FAIL);
return true;
}
}
void I2SAudioSpeaker::loop() {
switch (this->state_) {
case speaker::STATE_STARTING:
this->start_();
[[fallthrough]];
case speaker::STATE_RUNNING:
case speaker::STATE_STOPPING:
this->watch_();
break;
case speaker::STATE_STOPPED:
break;
esp_err_t I2SAudioSpeaker::allocate_buffers_(size_t data_buffer_size, size_t ring_buffer_size) {
if (this->data_buffer_ == nullptr) {
// Allocate data buffer for temporarily storing audio from the ring buffer before writing to the I2S bus
ExternalRAMAllocator<uint8_t> allocator(ExternalRAMAllocator<uint8_t>::ALLOW_FAILURE);
this->data_buffer_ = allocator.allocate(data_buffer_size);
}
if (this->data_buffer_ == nullptr) {
return ESP_ERR_NO_MEM;
}
if (this->audio_ring_buffer_ == nullptr) {
// Allocate ring buffer
this->audio_ring_buffer_ = RingBuffer::create(ring_buffer_size);
}
if (this->audio_ring_buffer_ == nullptr) {
return ESP_ERR_NO_MEM;
}
return ESP_OK;
}
size_t I2SAudioSpeaker::play(const uint8_t *data, size_t length) {
if (this->is_failed()) {
ESP_LOGE(TAG, "Cannot play audio, speaker failed to setup");
return 0;
esp_err_t I2SAudioSpeaker::start_i2s_driver_() {
if (!this->parent_->try_lock()) {
return ESP_ERR_INVALID_STATE;
}
if (this->state_ != speaker::STATE_RUNNING && this->state_ != speaker::STATE_STARTING) {
this->start();
i2s_driver_config_t config = {
.mode = (i2s_mode_t) (this->i2s_mode_ | I2S_MODE_TX),
.sample_rate = this->sample_rate_,
.bits_per_sample = this->bits_per_sample_,
.channel_format = this->channel_,
.communication_format = this->i2s_comm_fmt_,
.intr_alloc_flags = ESP_INTR_FLAG_LEVEL1,
.dma_buf_count = DMA_BUFFERS_COUNT,
.dma_buf_len = DMA_BUFFER_SIZE,
.use_apll = this->use_apll_,
.tx_desc_auto_clear = true,
.fixed_mclk = I2S_PIN_NO_CHANGE,
.mclk_multiple = I2S_MCLK_MULTIPLE_256,
.bits_per_chan = this->bits_per_channel_,
#if SOC_I2S_SUPPORTS_TDM
.chan_mask = (i2s_channel_t) (I2S_TDM_ACTIVE_CH0 | I2S_TDM_ACTIVE_CH1),
.total_chan = 2,
.left_align = false,
.big_edin = false,
.bit_order_msb = false,
.skip_msk = false,
#endif
};
#if SOC_I2S_SUPPORTS_DAC
if (this->internal_dac_mode_ != I2S_DAC_CHANNEL_DISABLE) {
config.mode = (i2s_mode_t) (config.mode | I2S_MODE_DAC_BUILT_IN);
}
size_t remaining = length;
size_t index = 0;
while (remaining > 0) {
DataEvent event;
event.stop = false;
size_t to_send_length = std::min(remaining, BUFFER_SIZE);
event.len = to_send_length;
memcpy(event.data, data + index, to_send_length);
if (xQueueSend(this->buffer_queue_, &event, 0) != pdTRUE) {
return index;
}
remaining -= to_send_length;
index += to_send_length;
#endif
esp_err_t err = i2s_driver_install(this->parent_->get_port(), &config, 0, nullptr);
if (err != ESP_OK) {
// Failed to install the driver, so unlock the I2S port
this->parent_->unlock();
return err;
}
return index;
#if SOC_I2S_SUPPORTS_DAC
if (this->internal_dac_mode_ == I2S_DAC_CHANNEL_DISABLE) {
#endif
i2s_pin_config_t pin_config = this->parent_->get_pin_config();
pin_config.data_out_num = this->dout_pin_;
err = i2s_set_pin(this->parent_->get_port(), &pin_config);
#if SOC_I2S_SUPPORTS_DAC
} else {
i2s_set_dac_mode(this->internal_dac_mode_);
}
#endif
if (err != ESP_OK) {
// Failed to set the data out pin, so uninstall the driver and unlock the I2S port
i2s_driver_uninstall(this->parent_->get_port());
this->parent_->unlock();
}
return err;
}
bool I2SAudioSpeaker::has_buffered_data() const { return uxQueueMessagesWaiting(this->buffer_queue_) > 0; }
esp_err_t I2SAudioSpeaker::reconfigure_i2s_stream_info_(audio::AudioStreamInfo &audio_stream_info) {
if (this->i2s_mode_ & I2S_MODE_MASTER) {
// ESP controls for the the I2S bus, so adjust the sample rate and bits per sample to match the incoming audio
this->sample_rate_ = audio_stream_info.sample_rate;
this->bits_per_sample_ = (i2s_bits_per_sample_t) audio_stream_info.bits_per_sample;
} else if (this->sample_rate_ != audio_stream_info.sample_rate) {
// Can't reconfigure I2S bus, so the sample rate must match the configured value
return ESP_ERR_INVALID_ARG;
}
if ((i2s_bits_per_sample_t) audio_stream_info.bits_per_sample > this->bits_per_sample_) {
// Currently can't handle the case when the incoming audio has more bits per sample than the configured value
return ESP_ERR_INVALID_ARG;
}
if (audio_stream_info.channels == 1) {
return i2s_set_clk(this->parent_->get_port(), this->sample_rate_, this->bits_per_sample_, I2S_CHANNEL_MONO);
} else if (audio_stream_info.channels == 2) {
return i2s_set_clk(this->parent_->get_port(), this->sample_rate_, this->bits_per_sample_, I2S_CHANNEL_STEREO);
}
return ESP_ERR_INVALID_ARG;
}
void I2SAudioSpeaker::delete_task_(size_t buffer_size) {
if (this->audio_ring_buffer_ != nullptr) {
xEventGroupWaitBits(this->event_group_,
MESSAGE_RING_BUFFER_AVAILABLE_TO_WRITE, // Bit message to read
pdFALSE, // Don't clear the bits on exit
pdTRUE, // Don't wait for all the bits,
portMAX_DELAY); // Block indefinitely until a command bit is set
this->audio_ring_buffer_.reset(); // Deallocates the ring buffer stored in the unique_ptr
this->audio_ring_buffer_ = nullptr;
}
if (this->data_buffer_ != nullptr) {
ExternalRAMAllocator<uint8_t> allocator(ExternalRAMAllocator<uint8_t>::ALLOW_FAILURE);
allocator.deallocate(this->data_buffer_, buffer_size);
this->data_buffer_ = nullptr;
}
xEventGroupSetBits(this->event_group_, SpeakerEventGroupBits::STATE_STOPPED);
this->task_created_ = false;
vTaskDelete(nullptr);
}
} // namespace i2s_audio
} // namespace esphome

111
esphome/components/i2s_audio/speaker/i2s_audio_speaker.h
View File

@@ -5,38 +5,21 @@
#include "../i2s_audio.h"
#include <driver/i2s.h>
#include <freertos/FreeRTOS.h>
#include <freertos/queue.h>
#include <freertos/event_groups.h>
#include <freertos/FreeRTOS.h>
#include "esphome/components/audio/audio.h"
#include "esphome/components/speaker/speaker.h"
#include "esphome/core/component.h"
#include "esphome/core/gpio.h"
#include "esphome/core/helpers.h"
#include "esphome/core/ring_buffer.h"
namespace esphome {
namespace i2s_audio {
static const size_t BUFFER_SIZE = 1024;
enum class TaskEventType : uint8_t {
STARTING = 0,
STARTED,
STOPPING,
STOPPED,
WARNING = 255,
};
struct TaskEvent {
TaskEventType type;
esp_err_t err;
};
struct DataEvent {
bool stop;
size_t len;
uint8_t data[BUFFER_SIZE];
};
class I2SAudioSpeaker : public I2SAudioOut, public speaker::Speaker, public Component {
public:
float get_setup_priority() const override { return esphome::setup_priority::LATE; }
@@ -55,25 +38,89 @@ class I2SAudioSpeaker : public I2SAudioOut, public speaker::Speaker, public Comp
void stop() override;
void finish() override;
size_t play(const uint8_t *data, size_t length) override;
/// @brief Plays the provided audio data.
/// Starts the speaker task, if necessary. Writes the audio data to the ring buffer.
/// @param data Audio data in the format set by the parent speaker classes ``set_audio_stream_info`` method.
/// @param length The length of the audio data in bytes.
/// @param ticks_to_wait The FreeRTOS ticks to wait before writing as much data as possible to the ring buffer.
/// @return The number of bytes that were actually written to the ring buffer.
size_t play(const uint8_t *data, size_t length, TickType_t ticks_to_wait) override;
size_t play(const uint8_t *data, size_t length) override { return play(data, length, 0); }
bool has_buffered_data() const override;
/// @brief Sets the volume of the speaker. It is implemented as a software volume control.
/// Overrides the default setter to convert the floating point volume to a Q15 fixed-point factor.
/// @param volume
void set_volume(float volume) override;
float get_volume() override { return this->volume_; }
protected:
void start_();
/// @brief Function for the FreeRTOS task handling audio output.
/// After receiving the COMMAND_START signal, allocates space for the buffers, starts the I2S driver, and reads
/// audio from the ring buffer and writes audio to the I2S port. Stops immmiately after receiving the COMMAND_STOP
/// signal and stops only after the ring buffer is empty after receiving the COMMAND_STOP_GRACEFULLY signal. Stops if
/// the ring buffer hasn't read data for more than timeout_ milliseconds. When stopping, it deallocates the buffers,
/// stops the I2S driver, unlocks the I2S port, and deletes the task. It communicates the state and any errors via
/// event_group_.
/// @param params I2SAudioSpeaker component
static void speaker_task(void *params);
/// @brief Sends a stop command to the speaker task via event_group_.
/// @param wait_on_empty If false, sends the COMMAND_STOP signal. If true, sends the COMMAND_STOP_GRACEFULLY signal.
void stop_(bool wait_on_empty);
void watch_();
static void player_task(void *params);
/// @brief Sets the corresponding ERR_ESP event group bits.
/// @param err esp_err_t error code.
/// @return True if an ERR_ESP bit is set and false if err == ESP_OK
bool send_esp_err_to_event_group_(esp_err_t err);
TaskHandle_t player_task_handle_{nullptr};
QueueHandle_t buffer_queue_;
QueueHandle_t event_queue_;
/// @brief Allocates the data buffer and ring buffer
/// @param data_buffer_size Number of bytes to allocate for the data buffer.
/// @param ring_buffer_size Number of bytes to allocate for the ring buffer.
/// @return ESP_ERR_NO_MEM if either buffer fails to allocate
/// ESP_OK if successful
esp_err_t allocate_buffers_(size_t data_buffer_size, size_t ring_buffer_size);
/// @brief Starts the ESP32 I2S driver.
/// Attempts to lock the I2S port, starts the I2S driver, and sets the data out pin. If it fails, it will unlock
/// the I2S port and uninstall the driver, if necessary.
/// @return ESP_ERR_INVALID_STATE if the I2S port is already locked.
/// ESP_ERR_INVALID_ARG if installing the driver or setting the data out pin fails due to a parameter error.
/// ESP_ERR_NO_MEM if the driver fails to install due to a memory allocation error.
/// ESP_FAIL if setting the data out pin fails due to an IO error
/// ESP_OK if successful
esp_err_t start_i2s_driver_();
/// @brief Adjusts the I2S driver configuration to match the incoming audio stream.
/// Modifies I2S driver's sample rate, bits per sample, and number of channel settings. If the I2S is in secondary
/// mode, it only modifies the number of channels.
/// @param audio_stream_info Describes the incoming audio stream
/// @return ESP_ERR_INVALID_ARG if there is a parameter error, if there is more than 2 channels in the stream, or if
/// the audio settings are incompatible with the configuration.
/// ESP_ERR_NO_MEM if the driver fails to reconfigure due to a memory allocation error.
/// ESP_OK if successful.
esp_err_t reconfigure_i2s_stream_info_(audio::AudioStreamInfo &audio_stream_info);
/// @brief Deletes the speaker's task.
/// Deallocates the data_buffer_ and audio_ring_buffer_, if necessary, and deletes the task. Should only be called by
/// the speaker_task itself.
/// @param buffer_size The allocated size of the data_buffer_.
void delete_task_(size_t buffer_size);
TaskHandle_t speaker_task_handle_{nullptr};
EventGroupHandle_t event_group_{nullptr};
uint8_t *data_buffer_;
std::unique_ptr<RingBuffer> audio_ring_buffer_;
uint32_t timeout_;
uint8_t dout_pin_;
uint32_t timeout_{0};
uint8_t dout_pin_{0};
bool task_created_{false};
int16_t q15_volume_factor_{INT16_MAX};
#if SOC_I2S_SUPPORTS_DAC
i2s_dac_mode_t internal_dac_mode_{I2S_DAC_CHANNEL_DISABLE};
#endif

25
esphome/components/speaker/__init__.py
View File

@@ -2,7 +2,7 @@ from esphome import automation
from esphome.automation import maybe_simple_id
import esphome.codegen as cg
import esphome.config_validation as cv
from esphome.const import CONF_DATA, CONF_ID
from esphome.const import CONF_DATA, CONF_ID, CONF_VOLUME
from esphome.core import CORE
from esphome.coroutine import coroutine_with_priority
@@ -23,6 +23,10 @@ StopAction = speaker_ns.class_(
FinishAction = speaker_ns.class_(
"FinishAction", automation.Action, cg.Parented.template(Speaker)
)
VolumeSetAction = speaker_ns.class_(
"VolumeSetAction", automation.Action, cg.Parented.template(Speaker)
)
IsPlayingCondition = speaker_ns.class_("IsPlayingCondition", automation.Condition)
IsStoppedCondition = speaker_ns.class_("IsStoppedCondition", automation.Condition)
@@ -90,6 +94,25 @@ automation.register_condition(
)(speaker_action)
@automation.register_action(
"speaker.volume_set",
VolumeSetAction,
cv.maybe_simple_value(
{
cv.GenerateID(): cv.use_id(Speaker),
cv.Required(CONF_VOLUME): cv.templatable(cv.percentage),
},
key=CONF_VOLUME,
),
)
async def speaker_volume_set_action(config, action_id, template_arg, args):
var = cg.new_Pvariable(action_id, template_arg)
await cg.register_parented(var, config[CONF_ID])
volume = await cg.templatable(config[CONF_VOLUME], args, float)
cg.add(var.set_volume(volume))
return var
@coroutine_with_priority(100.0)
async def to_code(config):
cg.add_global(speaker_ns.using)

5
esphome/components/speaker/automation.h
View File

@@ -34,6 +34,11 @@ template<typename... Ts> class PlayAction : public Action<Ts...>, public Parente
std::vector<uint8_t> data_static_{};
};
template<typename... Ts> class VolumeSetAction : public Action<Ts...>, public Parented<Speaker> {
TEMPLATABLE_VALUE(float, volume)
void play(Ts... x) override { this->parent_->set_volume(this->volume_.value(x...)); }
};
template<typename... Ts> class StopAction : public Action<Ts...>, public Parented<Speaker> {
public:
void play(Ts... x) override { this->parent_->stop(); }

37
esphome/components/speaker/speaker.h
View File

@@ -4,6 +4,12 @@
#include <cstdint>
#include <vector>
#ifdef USE_ESP32
#include <freertos/FreeRTOS.h>
#endif
#include "esphome/components/audio/audio.h"
namespace esphome {
namespace speaker {
@@ -16,14 +22,33 @@ enum State : uint8_t {
class Speaker {
public:
#ifdef USE_ESP32
/// @brief Plays the provided audio data.
/// If the speaker component doesn't implement this method, it falls back to the play method without this parameter.
/// @param data Audio data in the format specified by ``set_audio_stream_info`` method.
/// @param length The length of the audio data in bytes.
/// @param ticks_to_wait The FreeRTOS ticks to wait before writing as much data as possible to the ring buffer.
/// @return The number of bytes that were actually written to the speaker's internal buffer.
virtual size_t play(const uint8_t *data, size_t length, TickType_t ticks_to_wait) {
return this->play(data, length);
};
#endif
/// @brief Plays the provided audio data.
/// If the audio stream is not the default defined in "esphome/core/audio.h" and the speaker component implements it,
/// then this should be called after calling ``set_audio_stream_info``.
/// @param data Audio data in the format specified by ``set_audio_stream_info`` method.
/// @param length The length of the audio data in bytes.
/// @return The number of bytes that were actually written to the speaker's internal buffer.
virtual size_t play(const uint8_t *data, size_t length) = 0;
size_t play(const std::vector<uint8_t> &data) { return this->play(data.data(), data.size()); }
virtual void start() = 0;
virtual void stop() = 0;
// In compare between *STOP()* and *FINISH()*; *FINISH()* will stop after emptying the play buffer,
// while *STOP()* will break directly.
// When finish() is not implemented on the plateform component it should just do a normal stop.
// When finish() is not implemented on the platform component it should just do a normal stop.
virtual void finish() { this->stop(); }
virtual bool has_buffered_data() const = 0;
@@ -31,8 +56,18 @@ class Speaker {
bool is_running() const { return this->state_ == STATE_RUNNING; }
bool is_stopped() const { return this->state_ == STATE_STOPPED; }
// Volume control must be implemented by each speaker component, otherwise it will have no effect.
virtual void set_volume(float volume) { this->volume_ = volume; };
virtual float get_volume() { return this->volume_; }
void set_audio_stream_info(const audio::AudioStreamInfo &audio_stream_info) {
this->audio_stream_info_ = audio_stream_info;
}
protected:
State state_{STATE_STOPPED};
audio::AudioStreamInfo audio_stream_info_;
float volume_{1.0f};
};
} // namespace speaker