Commit d8e83fde authored by thomas dettbarn's avatar thomas dettbarn
Browse files

added some comments for an easier review.

parent c22be287

lib_enc/ivas_sns_enc_fx.c

+10 −10
Original line number Diff line number Diff line
@@ -59,7 +59,7 @@ static Word16 sns_1st_cod_fx( 
    Word32 *snsq_fx /* o  : quantized sns    Q16 */

)

{

    IF( exp_sns == Q15 )

    IF( exp_sns == 15 )

    {

        Word16 index;

        const Word16 split_len = M / 2;
@@ -72,20 +72,20 @@ static Word16 sns_1st_cod_fx( 
        SWITCH( L_frame )

        {

            case L_FRAME16k:

                means = &sns_1st_means_16k[core - 1][0];

                means = &sns_1st_means_16k[core - 1][0]; // Q14

                break;

            case L_FRAME25_6k:

                means = &sns_1st_means_25k6[core - 1][0];

                means = &sns_1st_means_25k6[core - 1][0]; // Q14

                break;

            case L_FRAME32k:

                means = &sns_1st_means_32k[core - 1][0];

                means = &sns_1st_means_32k[core - 1][0]; // Q14

                break;

            default:

                assert( !"illegal frame length in sns_1st_cod" );

        }

        FOR( Word16 i = 0; i < M; ++i )

        {

            Word32 tmp = L_mult( means[i], means_fix ); // Q16

            Word32 tmp = L_mult( means[i], means_fix ); // Q14->Q16

            snsq_fx[i] = L_sub( sns_fx[i], tmp );       // Q16

            move32();

        }
@@ -100,7 +100,7 @@ static Word16 sns_1st_cod_fx( 
            Word32 dist_min_fx;

            const Word16 cdbk_fix = 8; // 1.f / powf( 2, SNS_CDBKS_BITS_4_FRAC ) in Q15

            move16();

            const Word16 *const cdbk = &sns_1st_cdbk[split][core - 1][0];

            const Word16 *const cdbk = &sns_1st_cdbk[split][core - 1][0]; // Q12



            j0 = imult1616( split, split_len );

            j1 = add( j0, split_len );
@@ -114,14 +114,14 @@ static Word16 sns_1st_cod_fx( 
            {

                Word32 dist_fx = 0;

                move32();

                FOR( Word16 j = j0; j < j1; ++j )

                FOR( Word16 j = j0; j < j1; ++j ) // j1-j0=split_len. split_len=M/2. M=16

                {

                    Word32 tmp;

                    Word32 dist;

                    Word16 tmp2;



                    tmp = L_mult( *cdbk_ptr++, cdbk_fix ); // Q16

                    dist = L_sub( snsq_fx[j], tmp );

                    tmp = L_mult( *cdbk_ptr++, cdbk_fix ); // Q12-Q16

                    dist = L_sub( snsq_fx[j], tmp ); // Q16

                    dist = L_shr( dist, 4 ); // make sure that the next multiplication does not overflow



                    tmp2 = extract_l( dist );
@@ -781,7 +781,7 @@ Word16 quantize_sns_fx( 
                IF( zero_side_flag[k] )

                {

                    set32_fx( snsQ_fx, 0, M );

                    CONTINUE;

                    continue;

                }



                nStages = SNS_MSVQ_NSTAGES_SIDE;