ESP CSI的FFT AGC gain是什么

[greentor]

例程里面的，不懂是什么左右，如何设置
#if CONFIG_GAIN_CONTROL
static uint16_t agc_gain_sum=0;
static uint16_t fft_gain_sum=0;
static uint8_t agc_gain_force_value=0;
static uint8_t fft_gain_force_value=0;
if (s_count<100) {
agc_gain_sum += phy_info->agc_gain;
fft_gain_sum += phy_info->fft_gain;
}
else if (s_count == 100) {
agc_gain_force_value = agc_gain_sum/100;
fft_gain_force_value = fft_gain_sum/100;
//s_count = 0;
#if CONFIG_FORCE_GAIN
phy_fft_scale_force(1,fft_gain_force_value);
phy_force_rx_gain(1,agc_gain_force_value);
#endif
ESP_LOGI(TAG,"fft_force %d, agc_force %d",fft_gain_force_value,agc_gain_force_value);
}
#endif