static av_always_inline void encode_mb_internal(MpegEncContext *s, int motion_x, int motion_y, int mb_block_height, int mb_block_count)

{

    int16_t weight[8][64];

    DCTELEM orig[8][64];

    const int mb_x= s->mb_x;

    const int mb_y= s->mb_y;

    int i;

    int skip_dct[8];

    int dct_offset   = s->linesize*8; //default for progressive frames

    uint8_t *ptr_y, *ptr_cb, *ptr_cr;

    int wrap_y, wrap_c;



    for(i=0; i<mb_block_count; i++) skip_dct[i]=s->skipdct;



    if(s->adaptive_quant){

        const int last_qp= s->qscale;

        const int mb_xy= mb_x + mb_y*s->mb_stride;



        s->lambda= s->lambda_table[mb_xy];

        update_qscale(s);



        if(!(s->flags&CODEC_FLAG_QP_RD)){

            s->qscale= s->current_picture_ptr->qscale_table[mb_xy];

            s->dquant= s->qscale - last_qp;



            if(s->out_format==FMT_H263){

                s->dquant= av_clip(s->dquant, -2, 2);



                if(s->codec_id==CODEC_ID_MPEG4){

                    if(!s->mb_intra){

                        if(s->pict_type == FF_B_TYPE){

                            if(s->dquant&1 || s->mv_dir&MV_DIRECT)

                                s->dquant= 0;

                        }

                        if(s->mv_type==MV_TYPE_8X8)

                            s->dquant=0;

                    }

                }

            }

        }

        ff_set_qscale(s, last_qp + s->dquant);

    }else if(s->flags&CODEC_FLAG_QP_RD)

        ff_set_qscale(s, s->qscale + s->dquant);



    wrap_y = s->linesize;

    wrap_c = s->uvlinesize;

    ptr_y = s->new_picture.data[0] + (mb_y * 16 * wrap_y) + mb_x * 16;

    ptr_cb = s->new_picture.data[1] + (mb_y * mb_block_height * wrap_c) + mb_x * 8;

    ptr_cr = s->new_picture.data[2] + (mb_y * mb_block_height * wrap_c) + mb_x * 8;



    if(mb_x*16+16 > s->width || mb_y*16+16 > s->height){

        uint8_t *ebuf= s->edge_emu_buffer + 32;

        ff_emulated_edge_mc(ebuf            , ptr_y , wrap_y,16,16,mb_x*16,mb_y*16, s->width   , s->height);

        ptr_y= ebuf;

        ff_emulated_edge_mc(ebuf+18*wrap_y  , ptr_cb, wrap_c, 8, mb_block_height, mb_x*8, mb_y*8, s->width>>1, s->height>>1);

        ptr_cb= ebuf+18*wrap_y;

        ff_emulated_edge_mc(ebuf+18*wrap_y+8, ptr_cr, wrap_c, 8, mb_block_height, mb_x*8, mb_y*8, s->width>>1, s->height>>1);

        ptr_cr= ebuf+18*wrap_y+8;

    }



    if (s->mb_intra) {

        if(s->flags&CODEC_FLAG_INTERLACED_DCT){

            int progressive_score, interlaced_score;



            s->interlaced_dct=0;

            progressive_score= s->dsp.ildct_cmp[4](s, ptr_y           , NULL, wrap_y, 8)

                              +s->dsp.ildct_cmp[4](s, ptr_y + wrap_y*8, NULL, wrap_y, 8) - 400;



            if(progressive_score > 0){

                interlaced_score = s->dsp.ildct_cmp[4](s, ptr_y           , NULL, wrap_y*2, 8)

                                  +s->dsp.ildct_cmp[4](s, ptr_y + wrap_y  , NULL, wrap_y*2, 8);

                if(progressive_score > interlaced_score){

                    s->interlaced_dct=1;



                    dct_offset= wrap_y;

                    wrap_y<<=1;

                    if (s->chroma_format == CHROMA_422)

                        wrap_c<<=1;

                }

            }

        }



        s->dsp.get_pixels(s->block[0], ptr_y                 , wrap_y);

        s->dsp.get_pixels(s->block[1], ptr_y              + 8, wrap_y);

        s->dsp.get_pixels(s->block[2], ptr_y + dct_offset    , wrap_y);

        s->dsp.get_pixels(s->block[3], ptr_y + dct_offset + 8, wrap_y);



        if(s->flags&CODEC_FLAG_GRAY){

            skip_dct[4]= 1;

            skip_dct[5]= 1;

        }else{

            s->dsp.get_pixels(s->block[4], ptr_cb, wrap_c);

            s->dsp.get_pixels(s->block[5], ptr_cr, wrap_c);

            if(!s->chroma_y_shift){ /* 422 */

                s->dsp.get_pixels(s->block[6], ptr_cb + (dct_offset>>1), wrap_c);

                s->dsp.get_pixels(s->block[7], ptr_cr + (dct_offset>>1), wrap_c);

            }

        }

    }else{

        op_pixels_func (*op_pix)[4];

        qpel_mc_func (*op_qpix)[16];

        uint8_t *dest_y, *dest_cb, *dest_cr;



        dest_y  = s->dest[0];

        dest_cb = s->dest[1];

        dest_cr = s->dest[2];



        if ((!s->no_rounding) || s->pict_type==FF_B_TYPE){

            op_pix = s->dsp.put_pixels_tab;

            op_qpix= s->dsp.put_qpel_pixels_tab;

        }else{

            op_pix = s->dsp.put_no_rnd_pixels_tab;

            op_qpix= s->dsp.put_no_rnd_qpel_pixels_tab;

        }



        if (s->mv_dir & MV_DIR_FORWARD) {

            MPV_motion(s, dest_y, dest_cb, dest_cr, 0, s->last_picture.data, op_pix, op_qpix);

            op_pix = s->dsp.avg_pixels_tab;

            op_qpix= s->dsp.avg_qpel_pixels_tab;

        }

        if (s->mv_dir & MV_DIR_BACKWARD) {

            MPV_motion(s, dest_y, dest_cb, dest_cr, 1, s->next_picture.data, op_pix, op_qpix);

        }



        if(s->flags&CODEC_FLAG_INTERLACED_DCT){

            int progressive_score, interlaced_score;



            s->interlaced_dct=0;

            progressive_score= s->dsp.ildct_cmp[0](s, dest_y           , ptr_y           , wrap_y, 8)

                              +s->dsp.ildct_cmp[0](s, dest_y + wrap_y*8, ptr_y + wrap_y*8, wrap_y, 8) - 400;



            if(s->avctx->ildct_cmp == FF_CMP_VSSE) progressive_score -= 400;



            if(progressive_score>0){

                interlaced_score = s->dsp.ildct_cmp[0](s, dest_y           , ptr_y           , wrap_y*2, 8)

                                  +s->dsp.ildct_cmp[0](s, dest_y + wrap_y  , ptr_y + wrap_y  , wrap_y*2, 8);



                if(progressive_score > interlaced_score){

                    s->interlaced_dct=1;



                    dct_offset= wrap_y;

                    wrap_y<<=1;

                    if (s->chroma_format == CHROMA_422)

                        wrap_c<<=1;

                }

            }

        }



        s->dsp.diff_pixels(s->block[0], ptr_y                 , dest_y                 , wrap_y);

        s->dsp.diff_pixels(s->block[1], ptr_y              + 8, dest_y              + 8, wrap_y);

        s->dsp.diff_pixels(s->block[2], ptr_y + dct_offset    , dest_y + dct_offset    , wrap_y);

        s->dsp.diff_pixels(s->block[3], ptr_y + dct_offset + 8, dest_y + dct_offset + 8, wrap_y);



        if(s->flags&CODEC_FLAG_GRAY){

            skip_dct[4]= 1;

            skip_dct[5]= 1;

        }else{

            s->dsp.diff_pixels(s->block[4], ptr_cb, dest_cb, wrap_c);

            s->dsp.diff_pixels(s->block[5], ptr_cr, dest_cr, wrap_c);

            if(!s->chroma_y_shift){ /* 422 */

                s->dsp.diff_pixels(s->block[6], ptr_cb + (dct_offset>>1), dest_cb + (dct_offset>>1), wrap_c);

                s->dsp.diff_pixels(s->block[7], ptr_cr + (dct_offset>>1), dest_cr + (dct_offset>>1), wrap_c);

            }

        }

        /* pre quantization */

        if(s->current_picture.mc_mb_var[s->mb_stride*mb_y+ mb_x]<2*s->qscale*s->qscale){

            //FIXME optimize

            if(s->dsp.sad[1](NULL, ptr_y               , dest_y               , wrap_y, 8) < 20*s->qscale) skip_dct[0]= 1;

            if(s->dsp.sad[1](NULL, ptr_y            + 8, dest_y            + 8, wrap_y, 8) < 20*s->qscale) skip_dct[1]= 1;

            if(s->dsp.sad[1](NULL, ptr_y +dct_offset   , dest_y +dct_offset   , wrap_y, 8) < 20*s->qscale) skip_dct[2]= 1;

            if(s->dsp.sad[1](NULL, ptr_y +dct_offset+ 8, dest_y +dct_offset+ 8, wrap_y, 8) < 20*s->qscale) skip_dct[3]= 1;

            if(s->dsp.sad[1](NULL, ptr_cb              , dest_cb              , wrap_c, 8) < 20*s->qscale) skip_dct[4]= 1;

            if(s->dsp.sad[1](NULL, ptr_cr              , dest_cr              , wrap_c, 8) < 20*s->qscale) skip_dct[5]= 1;

            if(!s->chroma_y_shift){ /* 422 */

                if(s->dsp.sad[1](NULL, ptr_cb +(dct_offset>>1), dest_cb +(dct_offset>>1), wrap_c, 8) < 20*s->qscale) skip_dct[6]= 1;

                if(s->dsp.sad[1](NULL, ptr_cr +(dct_offset>>1), dest_cr +(dct_offset>>1), wrap_c, 8) < 20*s->qscale) skip_dct[7]= 1;

            }

        }

    }



    if(s->avctx->quantizer_noise_shaping){

        if(!skip_dct[0]) get_visual_weight(weight[0], ptr_y                 , wrap_y);

        if(!skip_dct[1]) get_visual_weight(weight[1], ptr_y              + 8, wrap_y);

        if(!skip_dct[2]) get_visual_weight(weight[2], ptr_y + dct_offset    , wrap_y);

        if(!skip_dct[3]) get_visual_weight(weight[3], ptr_y + dct_offset + 8, wrap_y);

        if(!skip_dct[4]) get_visual_weight(weight[4], ptr_cb                , wrap_c);

        if(!skip_dct[5]) get_visual_weight(weight[5], ptr_cr                , wrap_c);

        if(!s->chroma_y_shift){ /* 422 */

            if(!skip_dct[6]) get_visual_weight(weight[6], ptr_cb + (dct_offset>>1), wrap_c);

            if(!skip_dct[7]) get_visual_weight(weight[7], ptr_cr + (dct_offset>>1), wrap_c);

        }

        memcpy(orig[0], s->block[0], sizeof(DCTELEM)*64*mb_block_count);

    }



    /* DCT & quantize */

    assert(s->out_format!=FMT_MJPEG || s->qscale==8);

    {

        for(i=0;i<mb_block_count;i++) {

            if(!skip_dct[i]){

                int overflow;

                s->block_last_index[i] = s->dct_quantize(s, s->block[i], i, s->qscale, &overflow);

            // FIXME we could decide to change to quantizer instead of clipping

            // JS: I don't think that would be a good idea it could lower quality instead

            //     of improve it. Just INTRADC clipping deserves changes in quantizer

                if (overflow) clip_coeffs(s, s->block[i], s->block_last_index[i]);

            }else

                s->block_last_index[i]= -1;

        }

        if(s->avctx->quantizer_noise_shaping){

            for(i=0;i<mb_block_count;i++) {

                if(!skip_dct[i]){

                    s->block_last_index[i] = dct_quantize_refine(s, s->block[i], weight[i], orig[i], i, s->qscale);

                }

            }

        }



        if(s->luma_elim_threshold && !s->mb_intra)

            for(i=0; i<4; i++)

                dct_single_coeff_elimination(s, i, s->luma_elim_threshold);

        if(s->chroma_elim_threshold && !s->mb_intra)

            for(i=4; i<mb_block_count; i++)

                dct_single_coeff_elimination(s, i, s->chroma_elim_threshold);



        if(s->flags & CODEC_FLAG_CBP_RD){

            for(i=0;i<mb_block_count;i++) {

                if(s->block_last_index[i] == -1)

                    s->coded_score[i]= INT_MAX/256;

            }

        }

    }



    if((s->flags&CODEC_FLAG_GRAY) && s->mb_intra){

        s->block_last_index[4]=

        s->block_last_index[5]= 0;

        s->block[4][0]=

        s->block[5][0]= (1024 + s->c_dc_scale/2)/ s->c_dc_scale;

    }



    //non c quantize code returns incorrect block_last_index FIXME

    if(s->alternate_scan && s->dct_quantize != dct_quantize_c){

        for(i=0; i<mb_block_count; i++){

            int j;

            if(s->block_last_index[i]>0){

                for(j=63; j>0; j--){

                    if(s->block[i][ s->intra_scantable.permutated[j] ]) break;

                }

                s->block_last_index[i]= j;

            }

        }

    }



    /* huffman encode */

    switch(s->codec_id){ //FIXME funct ptr could be slightly faster

    case CODEC_ID_MPEG1VIDEO:

    case CODEC_ID_MPEG2VIDEO:

        if (CONFIG_MPEG1VIDEO_ENCODER || CONFIG_MPEG2VIDEO_ENCODER)

            mpeg1_encode_mb(s, s->block, motion_x, motion_y);

        break;

    case CODEC_ID_MPEG4:

        if (CONFIG_MPEG4_ENCODER)

            mpeg4_encode_mb(s, s->block, motion_x, motion_y);

        break;

    case CODEC_ID_MSMPEG4V2:

    case CODEC_ID_MSMPEG4V3:

    case CODEC_ID_WMV1:

        if (CONFIG_MSMPEG4_ENCODER)

            msmpeg4_encode_mb(s, s->block, motion_x, motion_y);

        break;

    case CODEC_ID_WMV2:

        if (CONFIG_WMV2_ENCODER)

            ff_wmv2_encode_mb(s, s->block, motion_x, motion_y);

        break;

    case CODEC_ID_H261:

        if (CONFIG_H261_ENCODER)

            ff_h261_encode_mb(s, s->block, motion_x, motion_y);

        break;

    case CODEC_ID_H263:

    case CODEC_ID_H263P:

    case CODEC_ID_FLV1:

    case CODEC_ID_RV10:

    case CODEC_ID_RV20:

        if (CONFIG_H263_ENCODER || CONFIG_H263P_ENCODER ||

            CONFIG_FLV_ENCODER  || CONFIG_RV10_ENCODER  || CONFIG_RV20_ENCODER)

            h263_encode_mb(s, s->block, motion_x, motion_y);

        break;

    case CODEC_ID_MJPEG:

        if (CONFIG_MJPEG_ENCODER)

            ff_mjpeg_encode_mb(s, s->block);

        break;

    default:

        assert(0);

    }

}
