mb_analyse_inter_p16x16

analyse.c

static void mb_analyse_inter_p16x16( x264_t *h, x264_mb_analysis_t *a )
{
    x264_me_t m;
    int i_mvc;
    ALIGNED_ARRAY_8( int16_t, mvc,[8],[2] );
    int i_halfpel_thresh = INT_MAX;
    int *p_halfpel_thresh = (a->b_early_terminate && h->mb.pic.i_fref[0]>1) ? &i_halfpel_thresh : NULL;

    /* 16x16 Search on all ref frame */
    m.i_pixel = PIXEL_16x16;
    LOAD_FENC( &m, h->mb.pic.p_fenc, 0, 0 );

    a->l0.me16x16.cost = INT_MAX;
    x264_log( h, X264_LOG_DEBUG, "INT_MAX:%d i_fref:%d \n", INT_MAX, h->mb.pic.i_fref[0]);
    for( int i_ref = 0; i_ref < h->mb.pic.i_fref[0]; i_ref++ )
    {
        m.i_ref_cost = REF_COST( 0, i_ref );
        i_halfpel_thresh -= m.i_ref_cost;

        /* search with ref */
        LOAD_HPELS( &m, h->mb.pic.p_fref[0][i_ref], 0, i_ref, 0, 0 );
        LOAD_WPELS( &m, h->mb.pic.p_fref_w[i_ref], 0, i_ref, 0, 0 );

        x264_mb_predict_mv_16x16( h, 0, i_ref, m.mvp );
        x264_log( h, X264_LOG_DEBUG, "i_ref: %d mvp_xy: %d,%d \n", i_ref, m.mvp[0], m.mvp[1]);
        if( h->mb.ref_blind_dupe == i_ref )
        {
            CP32( m.mv, a->l0.mvc[0][0] );
            x264_me_refine_qpel_refdupe( h, &m, p_halfpel_thresh );
        }
        else
        {
            x264_mb_predict_mv_ref16x16( h, 0, i_ref, mvc, &i_mvc );
            x264_me_search_ref( h, &m, mvc, i_mvc, p_halfpel_thresh );
        }

        /* save mv for predicting neighbors */
        CP32( h->mb.mvr[0][i_ref][h->mb.i_mb_xy], m.mv );
        CP32( a->l0.mvc[i_ref][0], m.mv );
        x264_log( h, X264_LOG_DEBUG, "AnalyseMV i_frame:%d i_ref:%d i_mb_xy:%d mv(x,y): (%d,%d) \n", h->i_frame, i_ref, h->mb.i_mb_xy, m.mv[0], m.mv[1]);
        /* early termination
         * SSD threshold would probably be better than SATD */
        if( i_ref == 0
            && a->b_try_skip
            && m.cost-m.cost_mv < 300*a->i_lambda
            &&  abs(m.mv[0]-h->mb.cache.pskip_mv[0])
              + abs(m.mv[1]-h->mb.cache.pskip_mv[1]) <= 1
            && x264_macroblock_probe_pskip( h ) )
        {
            h->mb.i_type = P_SKIP;
            analyse_update_cache( h, a );
            assert( h->mb.cache.pskip_mv[1] <= h->mb.mv_max_spel[1] || h->i_thread_frames == 1 );
            return;
        }

        m.cost += m.i_ref_cost;
        i_halfpel_thresh += m.i_ref_cost;

        if( m.cost < a->l0.me16x16.cost )
            h->mc.memcpy_aligned( &a->l0.me16x16, &m, sizeof(x264_me_t) );
    }

    x264_macroblock_cache_ref( h, 0, 0, 4, 4, 0, a->l0.me16x16.i_ref );
    assert( a->l0.me16x16.mv[1] <= h->mb.mv_max_spel[1] || h->i_thread_frames == 1 );

    h->mb.i_type = P_L0;
    if( a->i_mbrd )
    {
        mb_init_fenc_cache( h, a->i_mbrd >= 2 || h->param.analyse.inter & X264_ANALYSE_PSUB8x8 );
        if( a->l0.me16x16.i_ref == 0 && M32( a->l0.me16x16.mv ) == M32( h->mb.cache.pskip_mv ) && !a->b_force_intra )
        {
            h->mb.i_partition = D_16x16;
            x264_macroblock_cache_mv_ptr( h, 0, 0, 4, 4, 0, a->l0.me16x16.mv );
            a->l0.i_rd16x16 = rd_cost_mb( h, a->i_lambda2 );
            if( !(h->mb.i_cbp_luma|h->mb.i_cbp_chroma) )
                h->mb.i_type = P_SKIP;
        }
    }
}