#pragma once

#include "inttypes.h"

#define q15_t int16_t
#define q31_t int32_t

#define FFT_BIN(num, fs, size) (uint16_t)((float)(num) * (float)fs / (float)size)
#define FFT_INDEX(freq, fs, size) (uint16_t)((float)freq / ((float)fs / (float)size))

int FFT(q15_t *data, uint16_t len);