EVS BE fix (89250720) · Commits · SA4 / Audio / IVAS BASOP

lib_com/prot_fx.h

+5 −0

Original line number	Diff line number	Diff line
		@@ -2880,6 +2880,11 @@ void Calc_rc0_h(
		Word16 rc0 / o : 1st parcor */
		);

		void Calc_rc0_h_ivas_enc_fx(
		Word16 h, / i : impulse response of composed filter */
		Word16 rc0 / o : 1st parcor */
		);

		void PostShortTerm_fx(
		Word16 sig_in, / i : i signal (pointer to current subframe */
		Word16 lpccoeff, / i : LPC coefficients for current subframe */

+59 −1

Original line number	Diff line number	Diff line
		@@ -756,6 +756,64 @@ void Calc_rc0_h(
		Word16 h, / i : impulse response of composed filter */
		Word16 rc0 / o : 1st parcor */
		)
		{
		Word32 L_acc;
		Word16 *ptrs;
		Word16 acf0, acf1;
		Word16 temp, sh_acf;
		Word16 i;

		/* computation of the autocorrelation function acf */
		L_acc = L_mult( h[0], h[0] );
		FOR( i = 1; i < LONG_H_ST; i++ )
		{
		L_acc = L_mac( L_acc, h[i], h[i] );
		}
		sh_acf = norm_l( L_acc );
		L_acc = L_shl( L_acc, sh_acf );
		acf0 = extract_h( L_acc );

		ptrs = h;

		temp = *ptrs++;
		move16();
		L_acc = L_mult( temp, *ptrs );
		FOR( i = 1; i < LONG_H_ST - 1; i++ )
		{
		temp = *ptrs++;
		move16();
		L_acc = L_mac( L_acc, temp, *ptrs );
		}
		L_acc = L_shl( L_acc, sh_acf );
		acf1 = extract_h( L_acc );

		/* Compute 1st parcor */
		IF( acf0 == 0 )
		{
		*rc0 = 0;
		move16();
		return;
		}

		IF( LT_16( acf0, abs_s( acf1 ) ) )
		{
		*rc0 = 0;
		move16();
		return;
		}
		*rc0 = div_s( abs_s( acf1 ), acf0 );
		move16();
		IF( acf1 > 0 )
		{
		rc0 = negate( rc0 );
		move16();
		}
		}

		void Calc_rc0_h_ivas_enc_fx(
		Word16 h, / i : impulse response of composed filter */
		Word16 rc0 / o : 1st parcor */
		)
		{
		Word32 L_acc;
		Word16 *ptrs;
		@@ -869,7 +927,7 @@ static void Calc_st_filt_tbe_ivas_enc_fx(
		/* compute i.r. of composed filter apond2 / apond1 */
		syn_filt_fx( temp, apond1, LPC_SHB_ORDER, apond2, h, LONG_H_ST, mem_zero, 0 );
		/* compute 1st parcor */
		Calc_rc0_h( h, parcor0 );
		Calc_rc0_h_ivas_enc_fx( h, parcor0 );

		/* compute g0 */
		L_g0 = L_mult0( 1, abs_s( h[0] ) );