separate changes to ivas_dirac_dec_output_synthesis_process_slot_fx() from cldfb_opt (6048e490) · Commits · SA4 / Audio / IVAS BASOP

lib_rend/ivas_dirac_output_synthesis_dec_fx.c

+341 −0

Original line number	Diff line number	Diff line
		@@ -817,6 +817,336 @@ void ivas_dirac_dec_output_synthesis_process_slot_fx(
		h_dirac_output_synthesis_state->diffuse_power_factor_fx,
		num_freq_bands ); /h_dirac_output_synthesis_state->diffuse_power_factor_q+Q31-Q31->h_dirac_output_synthesis_state->diffuse_power_factor_q/

		#ifdef OPT_SBA_DEC_PATH
		/Direct gain/

		Word16 exp_temp_cy_cross_dir_smooth_fx = (Word16 ) malloc( num_freq_bands * num_channels_dir * sizeof( Word16 ) );
		Word16 cy_cross_dir_smooth_e = sub( 31, h_dirac_output_synthesis_state->q_cy_cross_dir_smooth );

		FOR( Word16 kk = 0; kk < ( num_freq_bands * num_channels_dir ); kk++ )
		{
		exp_temp_cy_cross_dir_smooth_fx[kk] = cy_cross_dir_smooth_e; // h_dirac_output_synthesis_state->q_cy_cross_dir_smooth;
		move16();
		}

		Word16 q_temp = sub( add( shl( h_dirac_output_synthesis_state->direct_responses_q, 1 ), q_diffuseness ), 62 );
		Word32 one_in_qdiff = L_shl( 1, q_diffuseness );
		Word32 c1 = Madd_32_16( ONE_IN_Q29 /1 Q29/, L_sub( h_dirac_output_synthesis_params->diffuse_compensation_factor_decorr_fx, ONE_IN_Q29 /1 Q29/ ), 5461 /1.0 / 6.0 Q15/ ); /Diffuseness modellling nrg compensation/ /Q29/
		Word16 q_diff_c = sub( q_diffuseness, 2 );

		FOR( ch_idx = 0; ch_idx < s_min( 4, nchan_transport ); ch_idx++ )
		{
		Word16 k;
		IF( ch_idx != 0 )
		{
		Word32 a, c;
		Word16 b, b_exp, sqr_exp, q_diff_aab; // , q_diff_c;
		Word32 mpy_a_a_b, mpy_diff_c, mpy_diff_aab;
		Word32 sqr_inp, sqr;

		/Directonal sound gain nrg compensation/
		FOR( k = 0; k < num_freq_bands_diff; k++ )
		{
		a = h_dirac_output_synthesis_state->direct_responses_fx[ch_idx * num_freq_bands + k]; // Q = h_dirac_output_synthesis_state->q_direct_responses
		move32();


		b_exp = 0;
		move16();

		b = 0;
		move16();

		if ( 0 == reference_power[k + ( ch_idx + 1 ) * num_freq_bands] )
		{
		b = MAX_16;
		move16();
		}

		test();
		IF( reference_power[k + ( ch_idx + 1 ) * num_freq_bands] && reference_power[k + num_freq_bands] )
		{
		b = BASOP_Util_Divide3232_Scale( reference_power[k + num_freq_bands], reference_power[k + ( ch_idx + 1 ) * num_freq_bands], &b_exp ); /Q(15-b_exp)/
		}


		mpy_a_a_b = Mpy_32_32( a, Mpy_32_16_1( a, b ) ); // Q = (h_dirac_output_synthesis_state->q_direct_responses + (15 - b_exp) - 15) + (h_dirac_output_synthesis_state->q_direct_responses) - 31
		mpy_diff_aab = Mpy_32_32( L_sub( one_in_qdiff, diffuseness[k] ), mpy_a_a_b ); // Q(q_diff_aab) = 2*(h_dirac_output_synthesis_state->q_direct_responses) - b_exp - 31 + q_diffuseness -31
		mpy_diff_c = Mpy_32_32( diffuseness[k], c1 ); // Q(q_diff_c) = q_diffuseness - 2

		q_diff_aab = sub( q_temp, b_exp ); // add( sub( add( h_dirac_output_synthesis_state->direct_responses_q, sub( 15, b_exp ) ), 15 ), add( sub( h_dirac_output_synthesis_state->direct_responses_q, 31 ), sub( q_diffuseness, 31 ) ) );

		Word16 minq = sub( s_min( q_diff_aab, q_diff_c ), 1 );
		Word32 op1 = L_shr( mpy_diff_aab, sub( q_diff_aab, minq ) );
		Word32 op2 = L_shr( mpy_diff_c, sub( q_diff_c, minq ) );
		sqr_inp = L_add( op1, op2 );
		sqr_exp = sub( 31, minq );
		sqr = Sqrt32( sqr_inp, &sqr_exp ); /Q(31-sqr_exp)/
		sqr = L_shr( sqr, 2 ); /Q(31-sqr_exp)/
		IF( h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k] != 0 )
		{
		IF( GT_16( sqr_exp, cy_cross_dir_smooth_e ) )
		{
		h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k] = L_shr( h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k], sub( sqr_exp, cy_cross_dir_smooth_e ) ); /h_dirac_output_synthesis_state->q_cy_cross_dir_smooth-> (31-sqr_exp) /
		move32();
		exp_temp_cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k] = sqr_exp; // sub( 31, sqr_exp );
		move16();
		}
		ELSE
		{
		sqr = L_shr( sqr, sub( cy_cross_dir_smooth_e, sqr_exp ) ); /( 31- sqr_exp )-> h_dirac_output_synthesis_state->q_cy_cross_dir_smooth/
		}
		h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k] = L_add( h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k], sqr ); /exp_temp_cy_cross_dir_smooth_fx/
		move32();
		}
		ELSE
		{
		h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k] = sqr; // L_add( h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k], sqr ); /31-sqr_exp/
		move32();
		exp_temp_cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k] = sqr_exp; // sub( 31, sqr_exp );
		move16();
		}
		}
		c = Madd_32_16( ONE_IN_Q27 /1 Q27/, L_sub( h_dirac_output_synthesis_params->diffuse_compensation_factor_fx, ONE_IN_Q27 /1 Q27/ ), 5461 ); /Diffuseness modellling nrg compensation/ /* 1.0 / 6.0 = 5461 in Q15/ /Q27*/
		Word16 diff_c_exp = sub( q_diffuseness, 4 );
		#ifdef FIX_1310_SPEEDUP_ivas_dirac_dec_output_synthesis_process_slot
		FOR( ; k < num_freq_bands; k++ )
		{
		a = h_dirac_output_synthesis_state->direct_responses_fx[ch_idx * num_freq_bands + k]; // Q = h_dirac_output_synthesis_state->q_direct_responses
		move32();
		IF( reference_power[k + num_freq_bands] == 0 )
		{
		sqr_inp = Mpy_32_32( diffuseness[k], c );
		sqr_exp = sub( 31 + 4, q_diffuseness );
		}
		ELSE
		{
		Word16 diff_aab_exp;
		IF( reference_power[k + ( ch_idx + 1 ) * num_freq_bands] == 0 )
		{
		mpy_a_a_b = Mpy_32_32( a, a ); // Q = (h_dirac_output_synthesis_state->q_direct_responses + (h_dirac_output_synthesis_state->q_direct_responses) - 31
		mpy_diff_aab = Mpy_32_32( L_sub( one_in_qdiff, diffuseness[k] ), mpy_a_a_b ); // Q = 2*(h_dirac_output_synthesis_state->q_direct_responses) - 31 + q_diffuseness -31
		mpy_diff_c = Mpy_32_32( diffuseness[k], c ); // Q = q_diffuseness - 4
		diff_aab_exp = q_temp;
		move16();
		}
		ELSE
		{
		b = BASOP_Util_Divide3232_Scale( reference_power[k + num_freq_bands], reference_power[k + ( ch_idx + 1 ) * num_freq_bands], &b_exp ); /q(15-b_exp)/

		mpy_a_a_b = Mpy_32_32( a, Mpy_32_16_1( a, b ) ); // Q = (h_dirac_output_synthesis_state->q_direct_responses + (15 - b_exp) - 15) + (h_dirac_output_synthesis_state->q_direct_responses) - 31
		mpy_diff_aab = Mpy_32_32( L_sub( one_in_qdiff, diffuseness[k] ), mpy_a_a_b ); // Q = 2*(h_dirac_output_synthesis_state->q_direct_responses) - b_exp - 31 + q_diffuseness -31
		mpy_diff_c = Mpy_32_32( diffuseness[k], c ); // Q = q_diffuseness - 4
		diff_aab_exp = sub( q_temp, b_exp ); // sub(sub(add(sub(31 + 62, h_dirac_output_synthesis_state->direct_responses_q), b_exp), h_dirac_output_synthesis_state->direct_responses_q), q_diffuseness);
		}
		Word16 minq = sub( s_min( diff_aab_exp, diff_c_exp ), 1 );
		Word32 op1 = L_shr( mpy_diff_aab, sub( diff_aab_exp, minq ) );
		Word32 op2 = L_shr( mpy_diff_c, sub( diff_c_exp, minq ) );
		sqr_inp = L_add( op1, op2 );
		sqr_exp = sub( 31, minq );
		}
		sqr = Sqrt32( sqr_inp, &sqr_exp ); /Q(31-sqr_exp)/
		sqr = L_shr( sqr, 2 ); /Q(31-sqr_exp)/


		IF( h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k] != 0 )
		{
		IF( GT_16( sqr_exp, cy_cross_dir_smooth_e ) )
		{
		h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k] = L_shr( h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k], sub( sqr_exp, cy_cross_dir_smooth_e ) ); /h_dirac_output_synthesis_state->q_cy_cross_dir_smooth->Q( 31- sqr_exp )/
		move32();
		exp_temp_cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k] = sqr_exp; // sub( 31, sqr_exp );
		move16();
		}
		ELSE
		{
		sqr = L_shr( sqr, sub( cy_cross_dir_smooth_e, sqr_exp ) ); /Q(31- sqr_exp)->h_dirac_output_synthesis_state->q_cy_cross_dir_smooth/
		}
		h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k] = L_add( h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k], sqr ); /exp_temp_cy_cross_dir_smooth_fx[ch_idx num_freq_bands + k]*/
		move32();
		}
		ELSE
		{
		h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k] = L_add( h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k], sqr ); /Q(31- sqr_exp)/
		move32();
		exp_temp_cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k] = sqr_exp;
		move16();
		}
		}

		#else
		FOR( ; k < num_freq_bands; k++ )
		{
		a = h_dirac_output_synthesis_state->direct_responses_fx[ch_idx * num_freq_bands + k]; // Q = h_dirac_output_synthesis_state->q_direct_responses
		move32();
		IF( reference_power[k + num_freq_bands] == 0 )
		{
		b = 0;
		move16();
		b_exp = 0;
		move16();
		}
		ELSE
		{
		IF( reference_power[k + ( ch_idx + 1 ) * num_freq_bands] == 0 )
		{
		b = MAX_16;
		move16();
		b_exp = 0;
		move16();
		}
		ELSE
		{
		b = BASOP_Util_Divide3232_Scale( reference_power[k + num_freq_bands], reference_power[k + ( ch_idx + 1 ) * num_freq_bands], &b_exp ); /q(15-b_exp)/
		}
		}

		mpy_a_a_b = Mpy_32_32( a, Mpy_32_16_1( a, b ) ); // Q = (h_dirac_output_synthesis_state->q_direct_responses + (15 - b_exp) - 15) + (h_dirac_output_synthesis_state->q_direct_responses) - 31
		mpy_diff_aab = Mpy_32_32( L_sub( L_shl( 1, q_diffuseness ), diffuseness[k] ), mpy_a_a_b ); // Q = 2*(h_dirac_output_synthesis_state->q_direct_responses) - b_exp - 31 + q_diffuseness -31
		mpy_diff_c = Mpy_32_32( diffuseness[k], c2 ); // Q = q_diffuseness - 4

		q_diff_aab = add( add( h_dirac_output_synthesis_state->direct_responses_q, sub( sub( 15, b_exp ), 15 ) ), add( sub( h_dirac_output_synthesis_state->direct_responses_q, 31 ), sub( q_diffuseness, 31 ) ) );
		q_diff_c = sub( q_diffuseness, 4 );
		Word16 minq = sub( s_min( q_diff_aab, q_diff_c ), 1 );
		Word32 op1 = L_shr( mpy_diff_aab, sub( q_diff_aab, minq ) );
		Word32 op2 = L_shr( mpy_diff_c, sub( q_diff_c, minq ) );
		sqr_inp = L_add( op1, op2 );
		sqr_exp = sub( 31, minq );
		sqr = Sqrt32( sqr_inp, &sqr_exp ); /Q(31-sqr_exp)/
		sqr = L_shr( sqr, 2 ); /Q(31-sqr_exp)/
		IF( h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k] != 0 )
		{
		IF( GT_16( sqr_exp, cy_cross_dir_smooth_e ) )
		{
		h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k] = L_shr( h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k], sub( sqr_exp, cy_cross_dir_smooth_e ) ); /h_dirac_output_synthesis_state->q_cy_cross_dir_smooth->Q( 31- sqr_exp )/
		move32();
		Q_temp_cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k] = sqr_exp; // sub( 31, sqr_exp );
		move16();
		}
		ELSE
		{
		sqr = L_shr( sqr, sub( cy_cross_dir_smooth_e, sqr_exp ) ); /Q(31- sqr_exp)->h_dirac_output_synthesis_state->q_cy_cross_dir_smooth/
		}
		h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k] = L_add( h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k], sqr ); /Q_temp_cy_cross_dir_smooth_fx[ch_idx num_freq_bands + k]*/
		move32();
		}
		ELSE
		{
		h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k] = L_add( h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k], sqr ); /Q(31- sqr_exp)/
		move32();
		Q_temp_cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k] = sqr_exp; // sub( 31, sqr_exp );
		move16();
		}
		}
		#endif
		}
		ELSE
		{
		Word32 sqr_inp, sqr;
		Word16 sqr_exp;
		Word32 One_in_qdiff = L_shl( 1, sub( q_diffuseness, 1 ) );
		Word32 diff = L_sub( h_dirac_output_synthesis_params->diffuse_compensation_factor_decorr_fx /q29=0.5 q30/, ONE_IN_Q29 /0.5 Q30*/ ); // Q30
		Word16 sq_e = sub( 32, q_diffuseness ); // 31-(q_diffuseness-1)
		/Diffuseness modellling nrg compensation/
		FOR( k = 0; k < num_freq_bands_diff; k++ )
		{
		/diffuseness[k] 0.5f * ( h_dirac_output_synthesis_params->diffuse_compensation_factor_decorr - 1.f ) )*/
		sqr_inp = Madd_32_32( One_in_qdiff, diffuseness[k], diff ); // Q = q_diffuseness - 1
		sqr_exp = sq_e;
		move16();
		sqr = Sqrt32( sqr_inp, &sqr_exp ); /Q(31-sqr_exp)/
		sqr = L_shr( sqr, 2 ); /Q(31-sqr_exp)/
		IF( h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k] != 0 )
		{
		IF( LT_16( cy_cross_dir_smooth_e, sqr_exp ) )
		{
		h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k] = L_shr( h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k], sub( sqr_exp, cy_cross_dir_smooth_e ) ); /h_dirac_output_synthesis_state->q_cy_cross_dir_smooth->Q(31- sqr_exp)/
		move32();
		exp_temp_cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k] = sqr_exp; // sub( 31, sqr_exp );
		move16();
		}
		ELSE
		{
		sqr = L_shr( sqr, sub( cy_cross_dir_smooth_e, sqr_exp ) ); /Q(31-sqr_exp)->h_dirac_output_synthesis_state->q_cy_cross_dir_smooth/
		}
		h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k] = L_add( h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k], sqr ); /exp_temp_cy_cross_dir_smooth_fx[ch_idx num_freq_bands + k]*/
		move32();
		}
		ELSE
		{
		h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k] = sqr; /Q(31-sqr_exp)/
		move32();
		exp_temp_cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k] = sqr_exp; // sub( 31, sqr_exp );
		move16();
		}
		}
		FOR( ; k < num_freq_bands; k++ )
		{
		sqr_inp = Madd_32_32( One_in_qdiff, diffuseness[k], L_sub( h_dirac_output_synthesis_params->diffuse_compensation_factor_decorr_fx, ONE_IN_Q29 /1 Q29/ ) ); // Q = q_diffuseness - 1
		sqr_exp = sq_e;
		move16();
		sqr = Sqrt32( sqr_inp, &sqr_exp ); /Q(31-sqr_exp)/
		sqr = L_shr( sqr, 2 ); /Q(31-sqr_exp)/
		IF( h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k] != 0 )
		{
		IF( GT_16( sqr_exp, cy_cross_dir_smooth_e ) )
		{
		h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k] = L_shr( h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k], sub( sqr_exp, cy_cross_dir_smooth_e ) ); /h_dirac_output_synthesis_state->q_cy_cross_dir_smooth, Q( 31- sqr_exp )/
		move32();
		exp_temp_cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k] = sqr_exp; // sub( 31, sqr_exp );
		move16();
		}
		ELSE
		{
		sqr = L_shr( sqr, sub( cy_cross_dir_smooth_e, sqr_exp ) ); /Q( 31- sqr_exp ), h_dirac_output_synthesis_state->q_cy_cross_dir_smooth/
		}
		h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k] = L_add( h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k], sqr ); /exp_temp_cy_cross_dir_smooth_fx[ch_idx num_freq_bands + k]*/
		move32();
		}
		ELSE
		{
		h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k] = L_add( h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k], sqr ); /Q(31-sqr_exp)/
		move32();
		exp_temp_cy_cross_dir_smooth_fx[ch_idx * num_freq_bands + k] = sqr_exp;
		move16();
		}
		}
		}
		}
		Word16 temp = exp_temp_cy_cross_dir_smooth_fx[0]; /q0/
		move16();
		FOR( Word16 kk = 1; kk < ( num_freq_bands * num_channels_dir ); kk++ )
		{
		temp = s_max( exp_temp_cy_cross_dir_smooth_fx[kk], temp );
		}


		/Directional gain (panning)/
		Word16 temp_q = sub( add( h_dirac_output_synthesis_state->direct_power_factor_q, h_dirac_output_synthesis_state->direct_responses_q ), 31 );
		Word16 temp_exp = sub( 31, temp_q );

		IF( LT_16( temp, temp_exp ) )
		{
		FOR( Word16 kk = 0; kk < ( num_freq_bands * num_channels_dir ); kk++ )
		{
		h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[kk] = L_shl( h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[kk], sub( exp_temp_cy_cross_dir_smooth_fx[kk], temp_exp ) ); /h_dirac_output_synthesis_state->q_cy_cross_dir_smooth ->temp_q/
		move32();
		}
		h_dirac_output_synthesis_state->q_cy_cross_dir_smooth = temp_q;
		move16();
		}
		ELSE
		{
		FOR( Word16 kk = 0; kk < ( num_freq_bands * num_channels_dir ); kk++ )
		{
		h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[kk] = L_shl( h_dirac_output_synthesis_state->cy_cross_dir_smooth_fx[kk], sub( exp_temp_cy_cross_dir_smooth_fx[kk], temp ) ); /exp_temp_cy_cross_dir_smooth_fx[kk]->temp/
		move32();
		}
		h_dirac_output_synthesis_state->q_cy_cross_dir_smooth = sub( 31, temp );
		move16();
		}
		free( exp_temp_cy_cross_dir_smooth_fx );
		#else /* OPT_SBA_DEC_PATH */
		/Direct gain/

		Word16 Q_temp_cy_cross_dir_smooth_fx = (Word16 ) malloc( num_freq_bands * num_channels_dir * sizeof( Word16 ) );
		@@ -1175,6 +1505,8 @@ void ivas_dirac_dec_output_synthesis_process_slot_fx(
		h_dirac_output_synthesis_state->q_cy_cross_dir_smooth = temp_q;
		move16();
		}
		#endif /* OPT_SBA_DEC_PATH */

		Word16 temp_q1 = sub( h_dirac_output_synthesis_state->q_cy_cross_dir_smooth, temp_q );
		FOR( ch_idx = s_min( 4, nchan_transport ); ch_idx < num_channels_dir; ch_idx++ )
		{
		@@ -1686,11 +2018,20 @@ void ivas_dirac_dec_output_synthesis_process_subframe_gain_shd_fx(
		/Direct input->output/
		p_gains_dir = h_dirac_output_synthesis_state.cy_cross_dir_smooth_prev_fx; // (p_gains_dir_q)
		p_gains_dir_prev = h_dirac_output_synthesis_state.gains_dir_prev_fx;
		#ifdef OPT_SBA_DEC_PATH
		q_shift = sub( h_dirac_output_synthesis_state.q_cy_cross_dir_smooth_prev, h_dirac_output_synthesis_state.gains_dir_prev_q );
		#endif /* OPT_SBA_DEC_PATH */
		FOR( ch_idx = 0; ch_idx < num_channels_dir; ch_idx++ )
		{
		#ifdef OPT_SBA_DEC_PATH
		Scale_sig32( &h_dirac_output_synthesis_state.gains_dir_prev_fx[ch_idx * num_freq_bands],
		num_freq_bands,
		q_shift ); /h_dirac_output_synthesis_state.gains_dir_prev_q->h_dirac_output_synthesis_state.q_cy_cross_dir_smooth_prev/
		#else
		Scale_sig32( &h_dirac_output_synthesis_state.gains_dir_prev_fx[ch_idx * num_freq_bands],
		num_freq_bands,
		sub( h_dirac_output_synthesis_state.q_cy_cross_dir_smooth_prev, h_dirac_output_synthesis_state.gains_dir_prev_q ) ); /h_dirac_output_synthesis_state.gains_dir_prev_q->h_dirac_output_synthesis_state.q_cy_cross_dir_smooth_prev/
		#endif
		}
		h_dirac_output_synthesis_state.gains_dir_prev_q = h_dirac_output_synthesis_state.q_cy_cross_dir_smooth_prev;
		move16();