Commit 2f9f6572 authored by Sandesh Venkatesh's avatar Sandesh Venkatesh
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Fix for 3gpp issue 971: Waveform discrepency when transitioning from... 

Fix for 3gpp issue 971: Waveform discrepency when transitioning from concealing a lost frame to decoding a received frame with SBA bitstream

[x] Changed guard bits logic to avoid saturation
parent 6f1fdf53

lib_dec/FEC_scale_syn_fx.c

+6 −5
Original line number Diff line number Diff line
@@ -790,15 +790,16 @@ void FEC_scale_syn_ivas_fx( 
    /*-----------------------------------------------------------------*

     * Find the energy/gain at the end of the frame

     *-----------------------------------------------------------------*/

    IF( LT_16( getScaleFactor16( synth, L_frame ), 2 ) )

    tmp = sub( 3, getScaleFactor16( synth, L_frame ) );

    IF( tmp > 0 )

    {

        Scale_sig( synth, L_frame, -1 );

        frame_ener_fx( L_frame, clas, synth, pitch[sub( shr( L_frame, 6 ), 1 )], &L_enr2 /*Q0*/, 1, sub( Q_syn, 1 ), 3, 0 );

        Scale_sig( synth, L_frame, 1 );

        Word16 synth_tmp[L_FRAME16k];

        Copy_Scale_sig( synth, synth_tmp, L_frame, -tmp ); // Q_synth - tmp

        frame_ener_fx( L_frame, clas, synth_tmp, pitch[L_frame / L_SUBFR - 1], &L_enr2 /*Q0*/, 1, sub( Q_syn, tmp ), 3, 0 );

    }

    ELSE

    {

        frame_ener_fx( L_frame, clas, synth, pitch[sub( shr( L_frame, 6 ), 1 )], &L_enr2 /*Q0*/, 1, Q_syn, 3, 0 );

        frame_ener_fx( L_frame, clas, synth, pitch[L_frame / L_SUBFR - 1], &L_enr2 /*Q0*/, 1, Q_syn, 3, 0 );

    }



    test();