Commit 56daf71c authored by thomas dettbarn's avatar thomas dettbarn
Browse files

improved WMOPS performance of IGF_getWhiteSpectralData_ivas() by reimplementing a window sum.

parent 3782eb08

lib_dec/igf_dec_fx.c

+15 −7
Original line number Diff line number Diff line
@@ -2905,6 +2905,8 @@ static void IGF_getWhiteSpectralData_ivas( 
    Word16 tmp_e;

    Word16 out_e_arr[IGF_START_MX + MAX_IGF_SFB_LEN];

    Word16 max_out_e;

    Word64 window_sum;

    Word64 left_one;

    assert( LT_16( stop, IGF_START_MX + MAX_IGF_SFB_LEN ) );



    /* inits */
@@ -2930,15 +2932,21 @@ static void IGF_getWhiteSpectralData_ivas( 
    ak_e = add( tmp_e, sub( shl( sub( in_e, s_l ), 1 ), 15 ) ); // tmp_e + 2 * (in_e - s_l) - 15

    ak_e = sub( ak_e, 1 );



    FOR( i = start; i < stop - level; i++ )

    {

        Word64 temp = 0;

    window_sum = 0;

    left_one = 0;

    move64();

        FOR( j = i - level; j < i + level + 1; j++ )

    move64();

    FOR( j = start - level; j < start + level ; j++ )

    {

            temp = W_mac_32_32( temp, in[j], in[j] );

        window_sum = W_mac_32_32( window_sum, in[j], in[j] );

    }

        ak = Mult_32_16( W_shl_sat_l( temp, shift ), quo ); // add( shl( level, 1 ), 1 ), &tmp_e ) );



    FOR( i = start; i < stop - level; i++ )

    {

        window_sum = W_sub( window_sum, left_one ); /* subtract the left one */

        window_sum = W_mac_32_32( window_sum, in[i + level], in[i + level] ); /* add the right one */

        left_one = W_mult_32_32( in[i - level], in[i - level] );

        ak = Mult_32_16( W_shl_sat_l( window_sum, shift ), quo ); // add( shl( level, 1 ), 1 ), &tmp_e ) );





        n = sub( ak_e, norm_l( ak ) );