if((c->avctx->me_cmp&FF_CMP_CHROMA) && !s->dsp.me_cmp[2]){ s->dsp.me_cmp[2]= zero_cmp; } if((c->avctx->me_sub_cmp&FF_CMP_CHROMA) && !s->dsp.me_sub_cmp[2]){ s->dsp.me_sub_cmp[2]= zero_cmp; } c->hpel_put[2][0]= c->hpel_put[2][1]= c->hpel_put[2][2]= c->hpel_put[2][3]= zero_hpel;
void ff_init_me(MpegEncContext *s){    MotionEstContext * const c= &s->me;    c->avctx= s->avctx;    ff_set_cmp(&s->dsp, s->dsp.me_pre_cmp, c->avctx->me_pre_cmp);    ff_set_cmp(&s->dsp, s->dsp.me_cmp, c->avctx->me_cmp);    ff_set_cmp(&s->dsp, s->dsp.me_sub_cmp, c->avctx->me_sub_cmp);    ff_set_cmp(&s->dsp, s->dsp.mb_cmp, c->avctx->mb_cmp);        c->flags    = get_flags(c, 0, c->avctx->me_cmp    &FF_CMP_CHROMA);    c->sub_flags= get_flags(c, 0, c->avctx->me_sub_cmp&FF_CMP_CHROMA);    c->mb_flags = get_flags(c, 0, c->avctx->mb_cmp    &FF_CMP_CHROMA);/*FIXME s->no_rounding b_type*/    if(s->flags&CODEC_FLAG_QPEL){        c->sub_motion_search= qpel_motion_search;        c->qpel_avg= s->dsp.avg_qpel_pixels_tab;        if(s->no_rounding) c->qpel_put= s->dsp.put_no_rnd_qpel_pixels_tab;        else               c->qpel_put= s->dsp.put_qpel_pixels_tab;    }else{        if(c->avctx->me_sub_cmp&FF_CMP_CHROMA)            c->sub_motion_search= hpel_motion_search;        else if(   c->avctx->me_sub_cmp == FF_CMP_SAD                 && c->avctx->    me_cmp == FF_CMP_SAD                 && c->avctx->    mb_cmp == FF_CMP_SAD)            c->sub_motion_search= sad_hpel_motion_search; // 2050 vs. 2450 cycles        else            c->sub_motion_search= hpel_motion_search;        c->hpel_avg= s->dsp.avg_pixels_tab;        if(s->no_rounding) c->hpel_put= s->dsp.put_no_rnd_pixels_tab;        else               c->hpel_put= s->dsp.put_pixels_tab;    }    if(s->linesize){        c->stride  = s->linesize;         c->uvstride= s->uvlinesize;    }else{        c->stride  = 16*s->mb_width + 32;        c->uvstride=  8*s->mb_width + 16;    }    c->temp= c->scratchpad;}