Commit b21540b5 authored by Manuel Jander's avatar Manuel Jander
Browse files

Use Q0 for synthFB_fx during PLC. Set Q_old_wtda and Q_old_wtdaLB to Q15 to... 

Use Q0 for synthFB_fx during PLC. Set Q_old_wtda and Q_old_wtdaLB to Q15 to avoid precision loss in case of zero signal for next frame.
parent dc08e179

lib_dec/ivas_mdct_core_dec_fx.c

+7 −1
Original line number Diff line number Diff line
@@ -1266,7 +1266,7 @@ void ivas_mdct_core_reconstruct_fx( 
                    /* Note: these buffers are not subframe-based, hence no indexing with k */

                    set16_fx( &st->hHQ_core->old_out_LB_fx[0], 0, L_frame[ch] );

                    set16_fx( &st->hHQ_core->old_out_fx[0], 0, L_frameTCX[ch] );

#ifdef FIX_1348_BIT_PRECISION_IMPROVEMENT_DYNAMIC_QOLD_NO

#ifdef FIX_1348_BIT_PRECISION_IMPROVEMENT_DYNAMIC_QOLD

                    st->hHQ_core->Q_old_wtda = Q15;

                    st->hHQ_core->Q_old_wtda_LB = Q15;

#endif
@@ -1390,6 +1390,7 @@ void ivas_mdct_core_reconstruct_fx( 
        ELSE /*ACELP core for ACELP-PLC */

        {

#ifdef FIX_1348_BIT_PRECISION_IMPROVEMENT_QWIN

#if 0

            Copy( st->hTcxDec->old_synth, synth_buf_fx, st->hTcxDec->old_synth_len );                                                                // Q = st->hTcxDec->q_old_synth

            Copy_Scale_sig( st->hTcxDec->old_synthFB_fx, synth_bufFB_fx, st->hTcxDec->old_synth_lenFB, sub( st->hTcxDec->q_old_synth, st->Q_syn ) ); // Q = st->hTcxDec->q_old_synth
@@ -1397,6 +1398,11 @@ void ivas_mdct_core_reconstruct_fx( 
            // Scale_sig( synth_bufFB_fx, st->hTcxDec->old_synth_lenFB, -2 );

            // Scale_sig( synth_bufFB_fx, st->hTcxDec->old_synth_lenFB, +2 );

            ///////////////////////////////////////////////////////////////////////////////////

#else

            Copy_Scale_sig( st->hTcxDec->old_synth, synth_buf_fx, st->hTcxDec->old_synth_len, sub(0, st->hTcxDec->q_old_synth ) );  // Q = st->hTcxDec->q_old_synth -> Q0

            Copy_Scale_sig( st->hTcxDec->old_synthFB_fx, synth_bufFB_fx, st->hTcxDec->old_synth_lenFB, sub( 0, st->Q_syn ) );       // Q = st->hTcxDec->q_old_synth -> Q0

            q_syn = 0;

#endif

#endif

            assert( EQ_16( st->bfi, 1 ) );

            /* PLC: [TCX: TD PLC] */