ff_emulated_edge_mc(s->emu_edge_buffer, ptr - 1 - s->linesize, s->linesize, 19, 19,
ff_emulated_edge_mc(s->edge_emu_buffer, ptr - 1 - s->linesize, s->linesize, 19, 19,
void ff_mspel_motion(MpegEncContext *s,                               uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,                               uint8_t **ref_picture, op_pixels_func (*pix_op)[4],                               int motion_x, int motion_y, int h){    Wmv2Context * const w= (Wmv2Context*)s;    uint8_t *ptr;    int dxy, offset, mx, my, src_x, src_y, v_edge_pos, linesize, uvlinesize;    int emu=0;        dxy = ((motion_y & 1) << 1) | (motion_x & 1);    dxy = 2*dxy + w->hshift;    src_x = s->mb_x * 16 + (motion_x >> 1);    src_y = s->mb_y * 16 + (motion_y >> 1);                    /* WARNING: do no forget half pels */    v_edge_pos = s->v_edge_pos;    src_x = clip(src_x, -16, s->width);    src_y = clip(src_y, -16, s->height);    linesize   = s->linesize;    uvlinesize = s->uvlinesize;    ptr = ref_picture[0] + (src_y * linesize) + src_x;    if(s->flags&CODEC_FLAG_EMU_EDGE){        if(src_x<1 || src_y<1 || src_x + 17  >= s->h_edge_pos                              || src_y + h+1 >= v_edge_pos){            ff_emulated_edge_mc(s->emu_edge_buffer, ptr - 1 - s->linesize, s->linesize, 19, 19,                              src_x-1, src_y-1, s->h_edge_pos, s->v_edge_pos);            ptr= s->edge_emu_buffer + 1 + s->linesize;            emu=1;        }    }    s->dsp.put_mspel_pixels_tab[dxy](dest_y             , ptr             , linesize);    s->dsp.put_mspel_pixels_tab[dxy](dest_y+8           , ptr+8           , linesize);    s->dsp.put_mspel_pixels_tab[dxy](dest_y  +8*linesize, ptr  +8*linesize, linesize);    s->dsp.put_mspel_pixels_tab[dxy](dest_y+8+8*linesize, ptr+8+8*linesize, linesize);    if(s->flags&CODEC_FLAG_GRAY) return;    if (s->out_format == FMT_H263) {        dxy = 0;        if ((motion_x & 3) != 0)            dxy |= 1;        if ((motion_y & 3) != 0)            dxy |= 2;        mx = motion_x >> 2;        my = motion_y >> 2;    } else {        mx = motion_x / 2;        my = motion_y / 2;        dxy = ((my & 1) << 1) | (mx & 1);        mx >>= 1;        my >>= 1;    }        src_x = s->mb_x * 8 + mx;    src_y = s->mb_y * 8 + my;    src_x = clip(src_x, -8, s->width >> 1);    if (src_x == (s->width >> 1))        dxy &= ~1;    src_y = clip(src_y, -8, s->height >> 1);    if (src_y == (s->height >> 1))        dxy &= ~2;    offset = (src_y * uvlinesize) + src_x;    ptr = ref_picture[1] + offset;    if(emu){        ff_emulated_edge_mc(s->edge_emu_buffer, ptr, s->uvlinesize, 9, 9,                          src_x, src_y, s->h_edge_pos>>1, s->v_edge_pos>>1);        ptr= s->edge_emu_buffer;    }    pix_op[1][dxy](dest_cb, ptr, uvlinesize, h >> 1);    ptr = ref_picture[2] + offset;    if(emu){        ff_emulated_edge_mc(s->edge_emu_buffer, ptr, s->uvlinesize, 9, 9,                          src_x, src_y, s->h_edge_pos>>1, s->v_edge_pos>>1);        ptr= s->edge_emu_buffer;    }    pix_op[1][dxy](dest_cr, ptr, uvlinesize, h >> 1);}