sascha/esphome
1
0
Fork 0
mirror of https://github.com/esphome/esphome.git synced 2025-10-09 21:33:48 +01:00
Code Issues Releases Wiki Activity

Allow i2s microphone bits per sample to be configured (#4884)

Browse Source
This commit is contained in:
Jesse Hills
2023-05-26 15:50:44 +12:00
committed by GitHub
parent 9cd173ef83
commit 79abd773a2
7 changed files with 54 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

35
esphome/components/i2s_audio/microphone/i2s_audio_microphone.cpp
View File

@@ -16,7 +16,13 @@ static const char *const TAG = "i2s_audio.microphone";
void I2SAudioMicrophone::setup() {
ESP_LOGCONFIG(TAG, "Setting up I2S Audio Microphone...");
this->buffer_.resize(BUFFER_SIZE);
ExternalRAMAllocator<uint8_t> allocator(ExternalRAMAllocator<uint8_t>::ALLOW_FAILURE);
this->buffer_ = allocator.allocate(BUFFER_SIZE);
if (this->buffer_ == nullptr) {
ESP_LOGE(TAG, "Failed to allocate buffer!");
this->mark_failed();
return;
}
#if SOC_I2S_SUPPORTS_ADC
if (this->adc_) {
@@ -48,7 +54,7 @@ void I2SAudioMicrophone::start_() {
i2s_driver_config_t config = {
.mode = (i2s_mode_t) (I2S_MODE_MASTER | I2S_MODE_RX),
.sample_rate = 16000,
.bits_per_sample = I2S_BITS_PER_SAMPLE_16BIT,
.bits_per_sample = this->bits_per_sample_,
.channel_format = this->channel_,
.communication_format = I2S_COMM_FORMAT_STAND_I2S,
.intr_alloc_flags = ESP_INTR_FLAG_LEVEL1,
@@ -107,16 +113,35 @@ void I2SAudioMicrophone::stop_() {
void I2SAudioMicrophone::read_() {
size_t bytes_read = 0;
esp_err_t err =
i2s_read(this->parent_->get_port(), this->buffer_.data(), BUFFER_SIZE, &bytes_read, (100 / portTICK_PERIOD_MS));
i2s_read(this->parent_->get_port(), this->buffer_, BUFFER_SIZE, &bytes_read, (100 / portTICK_PERIOD_MS));
if (err != ESP_OK) {
ESP_LOGW(TAG, "Error reading from I2S microphone: %s", esp_err_to_name(err));
this->status_set_warning();
return;
}
this->status_clear_warning();
this->data_callbacks_.call(this->buffer_);
std::vector<int16_t> samples;
size_t samples_read = 0;
if (this->bits_per_sample_ == I2S_BITS_PER_SAMPLE_16BIT) {
samples_read = bytes_read / sizeof(int16_t);
} else if (this->bits_per_sample_ == I2S_BITS_PER_SAMPLE_32BIT) {
samples_read = bytes_read / sizeof(int32_t);
} else {
ESP_LOGE(TAG, "Unsupported bits per sample: %d", this->bits_per_sample_);
return;
}
samples.resize(samples_read);
if (this->bits_per_sample_ == I2S_BITS_PER_SAMPLE_16BIT) {
memcpy(samples.data(), this->buffer_, bytes_read);
} else if (this->bits_per_sample_ == I2S_BITS_PER_SAMPLE_32BIT) {
for (size_t i = 0; i < samples_read; i++) {
int32_t temp = reinterpret_cast<int32_t *>(this->buffer_)[i] >> 14;
samples[i] = clamp<int16_t>(temp, INT16_MIN, INT16_MAX);
}
}
this->data_callbacks_.call(samples);
}
void I2SAudioMicrophone::loop() {