motion_est.c

ffmpeg移植到symbian的全部源代码

    const int size=0;
    const int h=8;
    int block;
    int P[10][2];
    uint8_t * const mv_penalty= c->current_mv_penalty;
    int same=1;
    const int stride= 2*s->linesize;
    int dmin_sum= 0;
    const int mot_stride= s->mb_stride;
    const int xy= s->mb_x + s->mb_y*mot_stride;

    c->ymin>>=1;
    c->ymax>>=1;
    c->stride<<=1;
    c->uvstride<<=1;
    init_interlaced_ref(s, ref_index);

    for(block=0; block<2; block++){
        int field_select;
        int best_dmin= INT_MAX;
        int best_field= -1;

        for(field_select=0; field_select<2; field_select++){
            int dmin, mx_i, my_i;
            int16_t (*mv_table)[2]= mv_tables[block][field_select];

            if(user_field_select){
                assert(field_select==0 || field_select==1);
                assert(field_select_tables[block][xy]==0 || field_select_tables[block][xy]==1);
                if(field_select_tables[block][xy] != field_select)
                    continue;
            }

            P_LEFT[0] = mv_table[xy - 1][0];
            P_LEFT[1] = mv_table[xy - 1][1];
            if(P_LEFT[0]       > (c->xmax<<1)) P_LEFT[0]       = (c->xmax<<1);

            c->pred_x= P_LEFT[0];
            c->pred_y= P_LEFT[1];

            if(!s->first_slice_line){
                P_TOP[0]      = mv_table[xy - mot_stride][0];
                P_TOP[1]      = mv_table[xy - mot_stride][1];
                P_TOPRIGHT[0] = mv_table[xy - mot_stride + 1][0];
                P_TOPRIGHT[1] = mv_table[xy - mot_stride + 1][1];
                if(P_TOP[1]      > (c->ymax<<1)) P_TOP[1]     = (c->ymax<<1);
                if(P_TOPRIGHT[0] < (c->xmin<<1)) P_TOPRIGHT[0]= (c->xmin<<1);
                if(P_TOPRIGHT[0] > (c->xmax<<1)) P_TOPRIGHT[0]= (c->xmax<<1);
                if(P_TOPRIGHT[1] > (c->ymax<<1)) P_TOPRIGHT[1]= (c->ymax<<1);

                P_MEDIAN[0]= mid_pred(P_LEFT[0], P_TOP[0], P_TOPRIGHT[0]);
                P_MEDIAN[1]= mid_pred(P_LEFT[1], P_TOP[1], P_TOPRIGHT[1]);
            }
            P_MV1[0]= mx; //FIXME not correct if block != field_select
            P_MV1[1]= my / 2;

            dmin = epzs_motion_search2(s, &mx_i, &my_i, P, block, field_select+ref_index, mv_table, (1<<16)>>1);

            dmin= c->sub_motion_search(s, &mx_i, &my_i, dmin, block, field_select+ref_index, size, h);

            mv_table[xy][0]= mx_i;
            mv_table[xy][1]= my_i;

            if(s->dsp.me_sub_cmp[0] != s->dsp.mb_cmp[0]){
                int dxy;

                //FIXME chroma ME
                uint8_t *ref= c->ref[field_select+ref_index][0] + (mx_i>>1) + (my_i>>1)*stride;
                dxy = ((my_i & 1) << 1) | (mx_i & 1);

                if(s->no_rounding){
                    s->dsp.put_no_rnd_pixels_tab[size][dxy](c->scratchpad, ref    , stride, h);
                }else{
                    s->dsp.put_pixels_tab       [size][dxy](c->scratchpad, ref    , stride, h);
                }
                dmin= s->dsp.mb_cmp[size](s, c->src[block][0], c->scratchpad, stride, h);
                dmin+= (mv_penalty[mx_i-c->pred_x] + mv_penalty[my_i-c->pred_y] + 1)*c->mb_penalty_factor;
            }else
                dmin+= c->mb_penalty_factor; //field_select bits

            dmin += field_select != block; //slightly prefer same field

            if(dmin < best_dmin){
                best_dmin= dmin;
                best_field= field_select;
            }
        }
        {
            int16_t (*mv_table)[2]= mv_tables[block][best_field];

            if(mv_table[xy][0] != mx) same=0; //FIXME check if these checks work and are any good at all
            if(mv_table[xy][1]&1) same=0;
            if(mv_table[xy][1]*2 != my) same=0;
            if(best_field != block) same=0;
        }

        field_select_tables[block][xy]= best_field;
        dmin_sum += best_dmin;
    }

    c->ymin<<=1;
    c->ymax<<=1;
    c->stride>>=1;
    c->uvstride>>=1;

    if(same)
        return INT_MAX;

    switch(c->avctx->mb_cmp&0xFF){
    /*case FF_CMP_SSE:
        return dmin_sum+ 32*s->qscale*s->qscale;*/
    case FF_CMP_RD:
        return dmin_sum;
    default:
        return dmin_sum+ 11*c->mb_penalty_factor;
    }
}

static void clip_input_mv(MpegEncContext * s, int16_t *mv, int interlaced){
    int ymax= s->me.ymax>>interlaced;
    int ymin= s->me.ymin>>interlaced;

    if(mv[0] < s->me.xmin) mv[0] = s->me.xmin;
    if(mv[0] > s->me.xmax) mv[0] = s->me.xmax;
    if(mv[1] <       ymin) mv[1] =       ymin;
    if(mv[1] >       ymax) mv[1] =       ymax;
}

static inline int check_input_motion(MpegEncContext * s, int mb_x, int mb_y, int p_type){
    MotionEstContext * const c= &s->me;
    Picture *p= s->current_picture_ptr;
    int mb_xy= mb_x + mb_y*s->mb_stride;
    int xy= 2*mb_x + 2*mb_y*s->b8_stride;
    int mb_type= s->current_picture.mb_type[mb_xy];
    int flags= c->flags;
    int shift= (flags&FLAG_QPEL) + 1;
    int mask= (1<<shift)-1;
    int x, y, i;
    int d=0;
    me_cmp_func cmpf= s->dsp.sse[0];
    me_cmp_func chroma_cmpf= s->dsp.sse[1];

    if(p_type && USES_LIST(mb_type, 1)){
        av_log(c->avctx, AV_LOG_ERROR, "backward motion vector in P frame\n");
        return INT_MAX/2;
    }
    assert(IS_INTRA(mb_type) || USES_LIST(mb_type,0) || USES_LIST(mb_type,1));

    for(i=0; i<4; i++){
        int xy= s->block_index[i];
        clip_input_mv(s, p->motion_val[0][xy], !!IS_INTERLACED(mb_type));
        clip_input_mv(s, p->motion_val[1][xy], !!IS_INTERLACED(mb_type));
    }

    if(IS_INTERLACED(mb_type)){
        int xy2= xy  + s->b8_stride;
        s->mb_type[mb_xy]=CANDIDATE_MB_TYPE_INTRA;
        c->stride<<=1;
        c->uvstride<<=1;

        if(!(s->flags & CODEC_FLAG_INTERLACED_ME)){
            av_log(c->avctx, AV_LOG_ERROR, "Interlaced macroblock selected but interlaced motion estimation disabled\n");
            return INT_MAX/2;
        }

        if(USES_LIST(mb_type, 0)){
            int field_select0= p->ref_index[0][xy ];
            int field_select1= p->ref_index[0][xy2];
            assert(field_select0==0 ||field_select0==1);
            assert(field_select1==0 ||field_select1==1);
            init_interlaced_ref(s, 0);

            if(p_type){
                s->p_field_select_table[0][mb_xy]= field_select0;
                s->p_field_select_table[1][mb_xy]= field_select1;
                *(uint32_t*)s->p_field_mv_table[0][field_select0][mb_xy]= *(uint32_t*)p->motion_val[0][xy ];
                *(uint32_t*)s->p_field_mv_table[1][field_select1][mb_xy]= *(uint32_t*)p->motion_val[0][xy2];
                s->mb_type[mb_xy]=CANDIDATE_MB_TYPE_INTER_I;
            }else{
                s->b_field_select_table[0][0][mb_xy]= field_select0;
                s->b_field_select_table[0][1][mb_xy]= field_select1;
                *(uint32_t*)s->b_field_mv_table[0][0][field_select0][mb_xy]= *(uint32_t*)p->motion_val[0][xy ];
                *(uint32_t*)s->b_field_mv_table[0][1][field_select1][mb_xy]= *(uint32_t*)p->motion_val[0][xy2];
                s->mb_type[mb_xy]= CANDIDATE_MB_TYPE_FORWARD_I;
            }

            x= p->motion_val[0][xy ][0];
            y= p->motion_val[0][xy ][1];
            d = cmp(s, x>>shift, y>>shift, x&mask, y&mask, 0, 8, field_select0, 0, cmpf, chroma_cmpf, flags);
            x= p->motion_val[0][xy2][0];
            y= p->motion_val[0][xy2][1];
            d+= cmp(s, x>>shift, y>>shift, x&mask, y&mask, 0, 8, field_select1, 1, cmpf, chroma_cmpf, flags);
        }
        if(USES_LIST(mb_type, 1)){
            int field_select0= p->ref_index[1][xy ];
            int field_select1= p->ref_index[1][xy2];
            assert(field_select0==0 ||field_select0==1);
            assert(field_select1==0 ||field_select1==1);
            init_interlaced_ref(s, 2);

            s->b_field_select_table[1][0][mb_xy]= field_select0;
            s->b_field_select_table[1][1][mb_xy]= field_select1;
            *(uint32_t*)s->b_field_mv_table[1][0][field_select0][mb_xy]= *(uint32_t*)p->motion_val[1][xy ];
            *(uint32_t*)s->b_field_mv_table[1][1][field_select1][mb_xy]= *(uint32_t*)p->motion_val[1][xy2];
            if(USES_LIST(mb_type, 0)){
                s->mb_type[mb_xy]= CANDIDATE_MB_TYPE_BIDIR_I;
            }else{
                s->mb_type[mb_xy]= CANDIDATE_MB_TYPE_BACKWARD_I;
            }

            x= p->motion_val[1][xy ][0];
            y= p->motion_val[1][xy ][1];
            d = cmp(s, x>>shift, y>>shift, x&mask, y&mask, 0, 8, field_select0+2, 0, cmpf, chroma_cmpf, flags);
            x= p->motion_val[1][xy2][0];
            y= p->motion_val[1][xy2][1];
            d+= cmp(s, x>>shift, y>>shift, x&mask, y&mask, 0, 8, field_select1+2, 1, cmpf, chroma_cmpf, flags);
            //FIXME bidir scores
        }
        c->stride>>=1;
        c->uvstride>>=1;
    }else if(IS_8X8(mb_type)){
        if(!(s->flags & CODEC_FLAG_4MV)){
            av_log(c->avctx, AV_LOG_ERROR, "4MV macroblock selected but 4MV encoding disabled\n");
            return INT_MAX/2;
        }
        cmpf= s->dsp.sse[1];
        chroma_cmpf= s->dsp.sse[1];
        init_mv4_ref(c);
        for(i=0; i<4; i++){
            xy= s->block_index[i];
            x= p->motion_val[0][xy][0];
            y= p->motion_val[0][xy][1];
            d+= cmp(s, x>>shift, y>>shift, x&mask, y&mask, 1, 8, i, i, cmpf, chroma_cmpf, flags);
        }
        s->mb_type[mb_xy]=CANDIDATE_MB_TYPE_INTER4V;
    }else{
        if(USES_LIST(mb_type, 0)){
            if(p_type){
                *(uint32_t*)s->p_mv_table[mb_xy]= *(uint32_t*)p->motion_val[0][xy];
                s->mb_type[mb_xy]=CANDIDATE_MB_TYPE_INTER;
            }else if(USES_LIST(mb_type, 1)){
                *(uint32_t*)s->b_bidir_forw_mv_table[mb_xy]= *(uint32_t*)p->motion_val[0][xy];
                *(uint32_t*)s->b_bidir_back_mv_table[mb_xy]= *(uint32_t*)p->motion_val[1][xy];
                s->mb_type[mb_xy]=CANDIDATE_MB_TYPE_BIDIR;
            }else{
                *(uint32_t*)s->b_forw_mv_table[mb_xy]= *(uint32_t*)p->motion_val[0][xy];
                s->mb_type[mb_xy]=CANDIDATE_MB_TYPE_FORWARD;
            }
            x= p->motion_val[0][xy][0];
            y= p->motion_val[0][xy][1];
            d = cmp(s, x>>shift, y>>shift, x&mask, y&mask, 0, 16, 0, 0, cmpf, chroma_cmpf, flags);
        }else if(USES_LIST(mb_type, 1)){
            *(uint32_t*)s->b_back_mv_table[mb_xy]= *(uint32_t*)p->motion_val[1][xy];
            s->mb_type[mb_xy]=CANDIDATE_MB_TYPE_BACKWARD;

            x= p->motion_val[1][xy][0];
            y= p->motion_val[1][xy][1];
            d = cmp(s, x>>shift, y>>shift, x&mask, y&mask, 0, 16, 2, 0, cmpf, chroma_cmpf, flags);
        }else
            s->mb_type[mb_xy]=CANDIDATE_MB_TYPE_INTRA;
    }
    return d;
}

void ff_estimate_p_frame_motion(MpegEncContext * s,
                                int mb_x, int mb_y)
{
    MotionEstContext * const c= &s->me;
    uint8_t *pix, *ppix;
    int sum, mx, my, dmin;
    int varc;            ///< the variance of the block (sum of squared (p[y][x]-average))
    int vard;            ///< sum of squared differences with the estimated motion vector
    int P[10][2];
    const int shift= 1+s->quarter_sample;
    int mb_type=0;
    Picture * const pic= &s->current_picture;

    init_ref(c, s->new_picture.data, s->last_picture.data, NULL, 16*mb_x, 16*mb_y, 0);

    assert(s->quarter_sample==0 || s->quarter_sample==1);
    assert(s->linesize == c->stride);
    assert(s->uvlinesize == c->uvstride);

    c->penalty_factor    = get_penalty_factor(s->lambda, s->lambda2, c->avctx->me_cmp);
    c->sub_penalty_factor= get_penalty_factor(s->lambda, s->lambda2, c->avctx->me_sub_cmp);
    c->mb_penalty_factor = get_penalty_factor(s->lambda, s->lambda2, c->avctx->mb_cmp);
    c->current_mv_penalty= c->mv_penalty[s->f_code] + MAX_MV;

    get_limits(s, 16*mb_x, 16*mb_y);
    c->skip=0;

    /* intra / predictive decision */
    pix = c->src[0][0];
    sum = s->dsp.pix_sum(pix, s->linesize);
    varc = s->dsp.pix_norm1(pix, s->linesize) - (((unsigned)(sum*sum))>>8) + 500;

    pic->mb_mean[s->mb_stride * mb_y + mb_x] = (sum+128)>>8;
    pic->mb_var [s->mb_stride * mb_y + mb_x] = (varc+128)>>8;
    c->mb_var_sum_temp += (varc+128)>>8;

    if(c->avctx->me_threshold){
        vard= check_input_motion(s, mb_x, mb_y, 1);

        if((vard+128)>>8 < c->avctx->me_threshold){
            int p_score= FFMIN(vard, varc-500+(s->lambda2>>FF_LAMBDA_SHIFT)*100);
            int i_score= varc-500+(s->lambda2>>FF_LAMBDA_SHIFT)*20;
            pic->mc_mb_var[s->mb_stride * mb_y + mb_x] = (vard+128)>>8;
            c->mc_mb_var_sum_temp += (vard+128)>>8;
            c->scene_change_score+= ff_sqrt(p_score) - ff_sqrt(i_score);
            return;
        }
        if((vard+128)>>8 < c->avctx->mb_threshold)
            mb_type= s->mb_type[mb_x + mb_y*s->mb_stride];
    }

    switch(s->me_method) {
    case ME_ZERO:
    default:
        no_motion_search(s, &mx, &my);
        mx-= mb_x*16;
        my-= mb_y*16;
        dmin = 0;
        break;
    case ME_X1:
    case ME_EPZS:
       {
            const int mot_stride = s->b8_stride;
            const int mot_xy = s->block_index[0];

            P_LEFT[0]       = s->current_picture.motion_val[0][mot_xy - 1][0];
            P_LEFT[1]       = s->current_picture.motion_val[0][mot_xy - 1][1];

            if(P_LEFT[0]       > (c->xmax<<shift)) P_LEFT[0]       = (c->xmax<<shift);

            if(!s->first_slice_line) {
                P_TOP[0]      = s->current_picture.motion_val[0][mot_xy - mot_stride    ][0];
                P_TOP[1]      = s->current_picture.motion_val[0][mot_xy - mot_stride    ][1];
                P_TOPRIGHT[0] = s->current_picture.motion_val[0][mot_xy - mot_stride + 2][0];
                P_TOPRIGHT[1] = s->current_picture.motion_val[0][mot_xy - mot_stride + 2][1];
                if(P_TOP[1]      > (c->ymax<<shift)) P_TOP[1]     = (c->ymax<<shift);
                if(P_TOPRIGHT[0] < (c->xmin<<shift)) P_TOPRIGHT[0]= (c->xmin<<shift);
                if(P_TOPRIGHT[1] > (c->ymax<<shift)) P_TOPRIGHT[1]= (c->ymax<<shift);

                P_MEDIAN[0]= mid_pred(P_LEFT[0], P_TOP[0], P_TOPRIGHT[0]);
                P_MEDIAN[1]= mid_pred(P_LEFT[1], P_TOP[1], P_TOPRIGHT[1]);