static void luma_mc_bi(HEVCContext *s, uint8_t *dst, ptrdiff_t dststride,
                       AVFrame *ref0, const Mv *mv0, int x_off, int y_off,
                       int block_w, int block_h, AVFrame *ref1, const Mv *mv1, struct MvField *current_mv)
{
    HEVCLocalContext *lc = s->HEVClc;
    ptrdiff_t src0stride  = ref0->linesize[0];
    ptrdiff_t src1stride  = ref1->linesize[0];
    int pic_width        = s->ps.sps->width;
    int pic_height       = s->ps.sps->height;
    int mx0              = mv0->x & 3;
    int my0              = mv0->y & 3;
    int mx1              = mv1->x & 3;
    int my1              = mv1->y & 3;
    int weight_flag      = (s->sh.slice_type == HEVC_SLICE_P && s->ps.pps->weighted_pred_flag) ||
                           (s->sh.slice_type == HEVC_SLICE_B && s->ps.pps->weighted_bipred_flag);
    int x_off0           = x_off + (mv0->x >> 2);
    int y_off0           = y_off + (mv0->y >> 2);
    int x_off1           = x_off + (mv1->x >> 2);
    int y_off1           = y_off + (mv1->y >> 2);
    int idx              = ff_hevc_pel_weight[block_w];

    uint8_t *src0  = ref0->data[0] + y_off0 * src0stride + (int)((unsigned)x_off0 << s->ps.sps->pixel_shift);
    uint8_t *src1  = ref1->data[0] + y_off1 * src1stride + (int)((unsigned)x_off1 << s->ps.sps->pixel_shift);

    if (x_off0 < QPEL_EXTRA_BEFORE || y_off0 < QPEL_EXTRA_AFTER ||
        x_off0 >= pic_width - block_w - QPEL_EXTRA_AFTER ||
        y_off0 >= pic_height - block_h - QPEL_EXTRA_AFTER) {
        const ptrdiff_t edge_emu_stride = EDGE_EMU_BUFFER_STRIDE << s->ps.sps->pixel_shift;
        int offset     = QPEL_EXTRA_BEFORE * src0stride       + (QPEL_EXTRA_BEFORE << s->ps.sps->pixel_shift);
        int buf_offset = QPEL_EXTRA_BEFORE * edge_emu_stride + (QPEL_EXTRA_BEFORE << s->ps.sps->pixel_shift);

        s->vdsp.emulated_edge_mc(lc->edge_emu_buffer, src0 - offset,
                                 edge_emu_stride, src0stride,
                                 block_w + QPEL_EXTRA,
                                 block_h + QPEL_EXTRA,
                                 x_off0 - QPEL_EXTRA_BEFORE, y_off0 - QPEL_EXTRA_BEFORE,
                                 pic_width, pic_height);
        src0 = lc->edge_emu_buffer + buf_offset;
        src0stride = edge_emu_stride;
    }

    if (x_off1 < QPEL_EXTRA_BEFORE || y_off1 < QPEL_EXTRA_AFTER ||
        x_off1 >= pic_width - block_w - QPEL_EXTRA_AFTER ||
        y_off1 >= pic_height - block_h - QPEL_EXTRA_AFTER) {
        const ptrdiff_t edge_emu_stride = EDGE_EMU_BUFFER_STRIDE << s->ps.sps->pixel_shift;
        int offset     = QPEL_EXTRA_BEFORE * src1stride       + (QPEL_EXTRA_BEFORE << s->ps.sps->pixel_shift);
        int buf_offset = QPEL_EXTRA_BEFORE * edge_emu_stride + (QPEL_EXTRA_BEFORE << s->ps.sps->pixel_shift);

        s->vdsp.emulated_edge_mc(lc->edge_emu_buffer2, src1 - offset,
                                 edge_emu_stride, src1stride,
                                 block_w + QPEL_EXTRA,
                                 block_h + QPEL_EXTRA,
                                 x_off1 - QPEL_EXTRA_BEFORE, y_off1 - QPEL_EXTRA_BEFORE,
                                 pic_width, pic_height);
        src1 = lc->edge_emu_buffer2 + buf_offset;
        src1stride = edge_emu_stride;
    }

    s->hevcdsp.put_hevc_qpel[idx][!!my0][!!mx0](lc->tmp, src0, src0stride,
                                                block_h, mx0, my0, block_w);
    if (!weight_flag)
        s->hevcdsp.put_hevc_qpel_bi[idx][!!my1][!!mx1](dst, dststride, src1, src1stride, lc->tmp,
                                                       block_h, mx1, my1, block_w);
    else
        s->hevcdsp.put_hevc_qpel_bi_w[idx][!!my1][!!mx1](dst, dststride, src1, src1stride, lc->tmp,
                                                         block_h, s->sh.luma_log2_weight_denom,
                                                         s->sh.luma_weight_l0[current_mv->ref_idx[0]],
                                                         s->sh.luma_weight_l1[current_mv->ref_idx[1]],
                                                         s->sh.luma_offset_l0[current_mv->ref_idx[0]],
                                                         s->sh.luma_offset_l1[current_mv->ref_idx[1]],
                                                         mx1, my1, block_w);

}