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[i2s_audio] I2S speaker improvements (#7749)

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Kevin Ahrendt 2024-11-12 13:20:12 -05:00 committed by GitHub
parent 58d028ac13
commit 928b39f495
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GPG key ID: B5690EEEBB952194
3 changed files with 72 additions and 59 deletions
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13
esphome/components/i2s_audio/speaker/__init__.py
View file

@ -24,9 +24,10 @@ I2SAudioSpeaker = i2s_audio_ns.class_(
"I2SAudioSpeaker", cg.Component, speaker.Speaker, I2SAudioOut
)
CONF_BUFFER_DURATION = "buffer_duration"
CONF_DAC_TYPE = "dac_type"
CONF_I2S_COMM_FMT = "i2s_comm_fmt"
CONF_NEVER = "never"
i2s_dac_mode_t = cg.global_ns.enum("i2s_dac_mode_t")
INTERNAL_DAC_OPTIONS = {
@ -73,8 +74,12 @@ BASE_SCHEMA = (
.extend(
{
cv.Optional(
CONF_TIMEOUT, default="500ms"
CONF_BUFFER_DURATION, default="500ms"
): cv.positive_time_period_milliseconds,
cv.Optional(CONF_TIMEOUT, default="500ms"): cv.Any(
cv.positive_time_period_milliseconds,
cv.one_of(CONF_NEVER, lower=True),
),
}
)
.extend(cv.COMPONENT_SCHEMA)
@ -116,4 +121,6 @@ async def to_code(config):
else:
cg.add(var.set_dout_pin(config[CONF_I2S_DOUT_PIN]))
cg.add(var.set_i2s_comm_fmt(config[CONF_I2S_COMM_FMT]))
cg.add(var.set_timeout(config[CONF_TIMEOUT]))
if config[CONF_TIMEOUT] != CONF_NEVER:
cg.add(var.set_timeout(config[CONF_TIMEOUT]))
cg.add(var.set_buffer_duration(config[CONF_BUFFER_DURATION]))

106
esphome/components/i2s_audio/speaker/i2s_audio_speaker.cpp
View file

@ -13,21 +13,22 @@
namespace esphome {
namespace i2s_audio {
static const size_t DMA_BUFFER_SIZE = 512;
static const uint8_t DMA_BUFFER_DURATION_MS = 15;
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_DELAY_MS = DMA_BUFFER_DURATION_MS * DMA_BUFFERS_COUNT / 2;
static const size_t TASK_STACK_SIZE = 4096;
static const ssize_t TASK_PRIORITY = 23;
static const size_t I2S_EVENT_QUEUE_COUNT = DMA_BUFFERS_COUNT + 1;
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
COMMAND_START = (1 << 0), // starts the speaker task
COMMAND_STOP = (1 << 1), // stops the speaker task
COMMAND_STOP_GRACEFULLY = (1 << 2), // Stops the speaker task once all data has been written
STATE_STARTING = (1 << 10),
STATE_RUNNING = (1 << 11),
STATE_STOPPING = (1 << 12),
@ -91,15 +92,21 @@ static const std::vector<int16_t> Q15_VOLUME_SCALING_FACTORS = {
void I2SAudioSpeaker::setup() {
ESP_LOGCONFIG(TAG, "Setting up I2S Audio Speaker...");
if (this->event_group_ == nullptr) {
this->event_group_ = xEventGroupCreate();
}
this->event_group_ = xEventGroupCreate();
if (this->event_group_ == nullptr) {
ESP_LOGE(TAG, "Failed to create event group");
this->mark_failed();
return;
}
this->i2s_event_queue_ = xQueueCreate(I2S_EVENT_QUEUE_COUNT, sizeof(i2s_event_t));
if (this->i2s_event_queue_ == nullptr) {
ESP_LOGE(TAG, "Failed to create I2S event queue");
this->mark_failed();
return;
}
}
void I2SAudioSpeaker::loop() {
@ -199,23 +206,17 @@ size_t I2SAudioSpeaker::play(const uint8_t *data, size_t length, TickType_t tick
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));
size_t bytes_written = 0;
if ((this->state_ == speaker::STATE_RUNNING) && (this->audio_ring_buffer_.use_count() == 1)) {
// Only one owner of the ring buffer (the speaker task), so the ring buffer is allocated and no other components are
// attempting to write to it.
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;
// Temporarily share ownership of the ring buffer so it won't be deallocated while writing
std::shared_ptr<RingBuffer> temp_ring_buffer = this->audio_ring_buffer_;
bytes_written = temp_ring_buffer->write_without_replacement((void *) data, length, ticks_to_wait);
}
return 0;
return bytes_written;
}
bool I2SAudioSpeaker::has_buffered_data() const {
@ -246,10 +247,12 @@ void I2SAudioSpeaker::speaker_task(void *params) {
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;
const size_t dma_buffers_size = DMA_BUFFERS_COUNT * DMA_BUFFER_DURATION_MS * this_speaker->sample_rate_ / 1000 *
bytes_per_sample * number_of_channels;
const size_t ring_buffer_size =
this_speaker->buffer_duration_ms_ * this_speaker->sample_rate_ / 1000 * 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))) {
if (this_speaker->send_esp_err_to_event_group_(this_speaker->allocate_buffers_(dma_buffers_size, ring_buffer_size))) {
// Failed to allocate buffers
xEventGroupSetBits(this_speaker->event_group_, SpeakerEventGroupBits::ERR_ESP_NO_MEM);
this_speaker->delete_task_(dma_buffers_size);
@ -258,9 +261,6 @@ void I2SAudioSpeaker::speaker_task(void *params) {
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))) {
@ -270,8 +270,10 @@ void I2SAudioSpeaker::speaker_task(void *params) {
bool stop_gracefully = false;
uint32_t last_data_received_time = millis();
bool tx_dma_underflow = false;
while ((millis() - last_data_received_time) <= this_speaker->timeout_) {
while (!this_speaker->timeout_.has_value() ||
(millis() - last_data_received_time) <= this_speaker->timeout_.value()) {
event_group_bits = xEventGroupGetBits(this_speaker->event_group_);
if (event_group_bits & SpeakerEventGroupBits::COMMAND_STOP) {
@ -281,12 +283,18 @@ void I2SAudioSpeaker::speaker_task(void *params) {
stop_gracefully = true;
}
i2s_event_t i2s_event;
while (xQueueReceive(this_speaker->i2s_event_queue_, &i2s_event, 0)) {
if (i2s_event.type == I2S_EVENT_TX_Q_OVF) {
tx_dma_underflow = 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)) {
@ -307,15 +315,13 @@ void I2SAudioSpeaker::speaker_task(void *params) {
if (bytes_written != bytes_read) {
xEventGroupSetBits(this_speaker->event_group_, SpeakerEventGroupBits::ERR_ESP_INVALID_SIZE);
}
tx_dma_underflow = false;
last_data_received_time = millis();
} else {
// No data received
if (stop_gracefully) {
if (stop_gracefully && tx_dma_underflow) {
break;
}
i2s_zero_dma_buffer(this_speaker->parent_->get_port());
}
}
} else {
@ -326,7 +332,6 @@ void I2SAudioSpeaker::speaker_task(void *params) {
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();
@ -402,8 +407,8 @@ esp_err_t I2SAudioSpeaker::allocate_buffers_(size_t data_buffer_size, size_t rin
return ESP_ERR_NO_MEM;
}
if (this->audio_ring_buffer_ == nullptr) {
// Allocate ring buffer
if (this->audio_ring_buffer_.use_count() == 0) {
// Allocate ring buffer. Uses a shared_ptr to ensure it isn't improperly deallocated.
this->audio_ring_buffer_ = RingBuffer::create(ring_buffer_size);
}
@ -419,6 +424,8 @@ esp_err_t I2SAudioSpeaker::start_i2s_driver_() {
return ESP_ERR_INVALID_STATE;
}
int dma_buffer_length = DMA_BUFFER_DURATION_MS * this->sample_rate_ / 1000;
i2s_driver_config_t config = {
.mode = (i2s_mode_t) (this->i2s_mode_ | I2S_MODE_TX),
.sample_rate = this->sample_rate_,
@ -427,7 +434,7 @@ esp_err_t I2SAudioSpeaker::start_i2s_driver_() {
.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,
.dma_buf_len = dma_buffer_length,
.use_apll = this->use_apll_,
.tx_desc_auto_clear = true,
.fixed_mclk = I2S_PIN_NO_CHANGE,
@ -448,7 +455,8 @@ esp_err_t I2SAudioSpeaker::start_i2s_driver_() {
}
#endif
esp_err_t err = i2s_driver_install(this->parent_->get_port(), &config, 0, nullptr);
esp_err_t err =
i2s_driver_install(this->parent_->get_port(), &config, I2S_EVENT_QUEUE_COUNT, &this->i2s_event_queue_);
if (err != ESP_OK) {
// Failed to install the driver, so unlock the I2S port
this->parent_->unlock();
@ -502,16 +510,7 @@ esp_err_t I2SAudioSpeaker::reconfigure_i2s_stream_info_(audio::AudioStreamInfo &
}
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;
}
this->audio_ring_buffer_.reset(); // Releases onwership of the shared_ptr
if (this->data_buffer_ != nullptr) {
ExternalRAMAllocator<uint8_t> allocator(ExternalRAMAllocator<uint8_t>::ALLOW_FAILURE);
@ -520,6 +519,7 @@ void I2SAudioSpeaker::delete_task_(size_t buffer_size) {
}
xEventGroupSetBits(this->event_group_, SpeakerEventGroupBits::STATE_STOPPED);
xQueueReset(this->i2s_event_queue_);
this->task_created_ = false;
vTaskDelete(nullptr);

12
esphome/components/i2s_audio/speaker/i2s_audio_speaker.h
View file

@ -7,6 +7,7 @@
#include <driver/i2s.h>
#include <freertos/event_groups.h>
#include <freertos/queue.h>
#include <freertos/FreeRTOS.h>
#include "esphome/components/audio/audio.h"
@ -27,6 +28,7 @@ class I2SAudioSpeaker : public I2SAudioOut, public speaker::Speaker, public Comp
void setup() override;
void loop() override;
void set_buffer_duration(uint32_t buffer_duration_ms) { this->buffer_duration_ms_ = buffer_duration_ms; }
void set_timeout(uint32_t ms) { this->timeout_ = ms; }
void set_dout_pin(uint8_t pin) { this->dout_pin_ = pin; }
#if SOC_I2S_SUPPORTS_DAC
@ -117,10 +119,14 @@ class I2SAudioSpeaker : public I2SAudioOut, public speaker::Speaker, public Comp
TaskHandle_t speaker_task_handle_{nullptr};
EventGroupHandle_t event_group_{nullptr};
uint8_t *data_buffer_;
std::unique_ptr<RingBuffer> audio_ring_buffer_;
QueueHandle_t i2s_event_queue_;
uint32_t timeout_;
uint8_t *data_buffer_;
std::shared_ptr<RingBuffer> audio_ring_buffer_;
uint32_t buffer_duration_ms_;
optional<uint32_t> timeout_;
uint8_t dout_pin_;
bool task_created_{false};