Commit 0c197e5e authored by Mohammadreza Naghibzadeh's avatar Mohammadreza Naghibzadeh
Browse files

Exclude EVS_MONO from dynamic scaling of the synthesis buffer to preserve bit-exactness.

parent c509a873

lib_dec/er_dec_tcx_fx.c

+16 −5
Original line number Diff line number Diff line
@@ -785,10 +785,21 @@ void con_tcx_fx( 
    syn = buf + M;             /*Q_syn*/

    Copy( synth - M, buf, M ); /*Q_syn*/

#ifdef FIX_1793_DEC_MC_TO_MONO_SCALING_ISSUE

    IF( NE_32( st->element_mode, EVS_MONO ) ) // to keep evs bit-exactness

    {

        scf = norm_s( tmp_deemph );

        new_Q = sub( Q_exc, 4 );

        new_Q = s_max( new_Q, -1 );

        new_Q = s_min( new_Q, scf );

    }

    ELSE

    {

        new_Q = sub( Q_exc, 3 );

        new_Q = s_max( new_Q, -1 );



        scf = 0;

        move16();

    }

#else

    new_Q = sub( Q_exc, 3 );

    new_Q = s_max( new_Q, -1 );
@@ -804,7 +815,7 @@ void con_tcx_fx( 


    Copy_Scale_sig( buf, mem_syn, M, exp_scale ); /*Q: tmp16*/

#ifdef FIX_1793_DEC_MC_TO_MONO_SCALING_ISSUE

    if ( GT_16( sub( Q_syn, st->Q_syn_factor ), scf ) )

    if ( NE_32( st->element_mode, EVS_MONO ) && GT_16( sub( Q_syn, st->Q_syn_factor ), scf ) )

    {

        Q_syn = add( scf, st->Q_syn_factor ); // so that (Q_syn - st->Q_syn_factor) = scf;

    }