HRT_GDC_BCI_COEF_BITS
#define HRT_GDC_BCI_COEF_ONE (1 << (HRT_GDC_BCI_COEF_BITS - 2)) /* We represent signed 10 bit coefficients. */
#define HRT_GDC_BCI_COEF_MASK ((1 << HRT_GDC_BCI_COEF_BITS) - 1)