Function apply_gain_ctrl

libavcodec/qcelpdec.c:423–433

* Apply generic gain control. * * @param v_out output vector * @param v_in gain-controlled vector * @param v_ref vector to control gain of * * TIA/EIA/IS-733 2.4.8.3, 2.4.8.6 */

 * TIA/EIA/IS-733 2.4.8.3, 2.4.8.6
 */
static void apply_gain_ctrl(float *v_out, const float *v_ref,
                            const float *v_in)
{
    int i;

    for (i = 0; i < 160; i += 40)
        ff_scale_vector_to_given_sum_of_squares(v_out + i, v_in + i,
                                                ff_dot_productf(v_ref + i,
                                                                v_ref + i, 40),
                                                40);
}

/**
 * Apply filter in pitch-subframe steps.