acelp_core_dec sub-functions fixed implementation updated/integrated.

    const int16_t extl     /* i  : extension layer info                    */

);

#ifdef IVAS_FLOAT_FIXED

static void calc_st_filt_fx(

    Word16 * apond2,      /* i  : coefficients of numerator             */

    Word16 * apond1,      /* i  : coefficients of denominator           */

    Word16 * parcor0,     /* o  : 1st parcor calcul. on composed filter */

    Word16 * sig_ltp_ptr, /* i/o: i  of 1/A(gamma1) : scaled by 1/g0    */

    Word16 * mem_zero,     /* i  : All zero memory                       */

    const int16_t extl     /* i  : extension layer info                  */

);

#endif

void scale_st_ivas(

    const float *sig_in,   /* i  : postfilter input signal                 */

    float *sig_out,        /* i/o: postfilter output signal                */