/* Apply pitch lag to the fixed vector (AMR section 6.1.2).  */
static void pitch_sharpening(int pitch_lag_int, float beta, float *fixed_vector)
/* Apply pitch lag to the fixed vector (AMR section 6.1.2).  */
static void pitch_sharpening(int pitch_lag_int, float beta, float *fixed_vector)
{
    int i;
    for (i = pitch_lag_int; i < SUBFR_SIZE; i++)
        fixed_vector[i] += beta * fixed_vector[i - pitch_lag_int];
}