#include "I2SConfig.h"

void initI2S() {
    // I2S configuration
    i2s_config_t i2s_config = {
        .mode = (i2s_mode_t)(I2S_MODE_MASTER | I2S_MODE_RX),
        .sample_rate = Config::SAMPLE_RATE,
        .bits_per_sample = I2S_BITS_PER_SAMPLE_16BIT,
        .channel_format = I2S_CHANNEL_FMT_ONLY_LEFT,
        .communication_format = I2S_COMM_FORMAT_STAND_I2S,
        .intr_alloc_flags = ESP_INTR_FLAG_LEVEL1,
        .dma_buf_count = Config::DMA_BUFFER_COUNT,
        .dma_buf_len = Config::DMA_BUFFER_LEN,
        .use_apll = false,
        .tx_desc_auto_clear = false,
        .fixed_mclk = 0
    };

    // I2S pin configuration
    i2s_pin_config_t i2s_mic_pins = {
        .bck_io_num = Config::I2S_MIC_SERIAL_CLOCK,
        .ws_io_num = Config::I2S_MIC_LEFT_RIGHT_CLOCK,
        .data_out_num = I2S_PIN_NO_CHANGE,
        .data_in_num = Config::I2S_MIC_SERIAL_DATA
    };

    // Install and configure I2S driver
    i2s_driver_install(I2S_NUM_0, &i2s_config, 0, NULL);
    i2s_set_pin(I2S_NUM_0, &i2s_mic_pins);
}

void readI2SSamples(int16_t* samples, size_t* bytesRead) {
    i2s_read(I2S_NUM_0, samples, Config::SAMPLE_BUFFER_SIZE * sizeof(int16_t), bytesRead, portMAX_DELAY);
}