a= block1[0]; b= w->abt_block2[n][0]; block1[0]= a+b; w->abt_block2[n][0]= a-b; }
static void wmv2_add_block(Wmv2Context *w, DCTELEM *block1, uint8_t *dst, int stride, int n){    MpegEncContext * const s= &w->s;    uint8_t temp[2][64];    int i;        if(w->abt_type_table[n] && 0){        int a,b;                a= block1[0];        b= w->abt_block2[n][0];        block1[0]= a+b;        w->abt_block2[n][0]= a-b;    }        switch(w->abt_type_table[n]){    case 0:        if (s->block_last_index[n] >= 0) {            s->idct_add (dst, stride, block1);        }        break;    case 1:        simple_idct84_add(dst           , stride, block1);        simple_idct84_add(dst + 4*stride, stride, w->abt_block2[n]);        memset(w->abt_block2[n], 0, 64*sizeof(DCTELEM));        break;    case 2:        simple_idct48_add(dst           , stride, block1);        simple_idct48_add(dst + 4       , stride, w->abt_block2[n]);        memset(w->abt_block2[n], 0, 64*sizeof(DCTELEM));        break;    default:        fprintf(stderr, "internal error in WMV2 abt\n");    }}