#pragma once
#include <stdbool.h>
#include <stdint.h>
#include "esp_err.h"
#include "freertos/FreeRTOS.h"
#include "feature_params.h"

typedef struct {
    const int16_t *pcm;   // FRAME_LEN samples, valid until audio_in_release_frame()
    uint8_t idx;          // slot index to hand back
    uint32_t seq;         // monotonically increasing frame number
} audio_frame_t;

esp_err_t audio_in_init(void);    // creates the I2S RX channel and the frame pool
esp_err_t audio_in_start(void);   // starts the capture task (pinned to core 1)
bool audio_in_get_frame(audio_frame_t *f, TickType_t wait);
void audio_in_release_frame(uint8_t idx);
uint32_t audio_in_frames_captured(void);
uint32_t audio_in_frames_dropped(void);   // processing fell behind