motion_est.c

ffmpeg移植到symbian的全部源代码

                if(s->out_format == FMT_H263){
                    c->pred_x = P_MEDIAN[0];
                    c->pred_y = P_MEDIAN[1];
                }else { /* mpeg1 at least */
                    c->pred_x= P_LEFT[0];
                    c->pred_y= P_LEFT[1];
                }
            }else{
                c->pred_x= P_LEFT[0];
                c->pred_y= P_LEFT[1];
            }

        }
        dmin = ff_epzs_motion_search(s, &mx, &my, P, 0, 0, s->p_mv_table, (1<<16)>>shift, 0, 16);

        break;
    }

    /* At this point (mx,my) are full-pell and the relative displacement */
    ppix = c->ref[0][0] + (my * s->linesize) + mx;

    vard = s->dsp.sse[0](NULL, pix, ppix, s->linesize, 16);

    pic->mc_mb_var[s->mb_stride * mb_y + mb_x] = (vard+128)>>8;
//    pic->mb_cmp_score[s->mb_stride * mb_y + mb_x] = dmin;
    c->mc_mb_var_sum_temp += (vard+128)>>8;

#if 0
    printf("varc=%4d avg_var=%4d (sum=%4d) vard=%4d mx=%2d my=%2d\n",
           varc, s->avg_mb_var, sum, vard, mx - xx, my - yy);
#endif
    if(mb_type){
        int p_score= FFMIN(vard, varc-500+(s->lambda2>>FF_LAMBDA_SHIFT)*100);
        int i_score= varc-500+(s->lambda2>>FF_LAMBDA_SHIFT)*20;
        c->scene_change_score+= ff_sqrt(p_score) - ff_sqrt(i_score);

        if(mb_type == CANDIDATE_MB_TYPE_INTER){
            c->sub_motion_search(s, &mx, &my, dmin, 0, 0, 0, 16);
            set_p_mv_tables(s, mx, my, 1);
        }else{
            mx <<=shift;
            my <<=shift;
        }
        if(mb_type == CANDIDATE_MB_TYPE_INTER4V){
            h263_mv4_search(s, mx, my, shift);

            set_p_mv_tables(s, mx, my, 0);
        }
        if(mb_type == CANDIDATE_MB_TYPE_INTER_I){
            interlaced_search(s, 0, s->p_field_mv_table, s->p_field_select_table, mx, my, 1);
        }
    }else if(c->avctx->mb_decision > FF_MB_DECISION_SIMPLE){
        int p_score= FFMIN(vard, varc-500+(s->lambda2>>FF_LAMBDA_SHIFT)*100);
        int i_score= varc-500+(s->lambda2>>FF_LAMBDA_SHIFT)*20;
        c->scene_change_score+= ff_sqrt(p_score) - ff_sqrt(i_score);

        if (vard*2 + 200*256 > varc)
            mb_type|= CANDIDATE_MB_TYPE_INTRA;
        if (varc*2 + 200*256 > vard || s->qscale > 24){
//        if (varc*2 + 200*256 + 50*(s->lambda2>>FF_LAMBDA_SHIFT) > vard){
            mb_type|= CANDIDATE_MB_TYPE_INTER;
            c->sub_motion_search(s, &mx, &my, dmin, 0, 0, 0, 16);
            if(s->flags&CODEC_FLAG_MV0)
                if(mx || my)
                    mb_type |= CANDIDATE_MB_TYPE_SKIPPED; //FIXME check difference
        }else{
            mx <<=shift;
            my <<=shift;
        }
        if((s->flags&CODEC_FLAG_4MV)
           && !c->skip && varc>50<<8 && vard>10<<8){
            if(h263_mv4_search(s, mx, my, shift) < INT_MAX)
                mb_type|=CANDIDATE_MB_TYPE_INTER4V;

            set_p_mv_tables(s, mx, my, 0);
        }else
            set_p_mv_tables(s, mx, my, 1);
        if((s->flags&CODEC_FLAG_INTERLACED_ME)
           && !c->skip){ //FIXME varc/d checks
            if(interlaced_search(s, 0, s->p_field_mv_table, s->p_field_select_table, mx, my, 0) < INT_MAX)
                mb_type |= CANDIDATE_MB_TYPE_INTER_I;
        }
    }else{
        int intra_score, i;
        mb_type= CANDIDATE_MB_TYPE_INTER;

        dmin= c->sub_motion_search(s, &mx, &my, dmin, 0, 0, 0, 16);
        if(c->avctx->me_sub_cmp != c->avctx->mb_cmp && !c->skip)
            dmin= ff_get_mb_score(s, mx, my, 0, 0, 0, 16, 1);

        if((s->flags&CODEC_FLAG_4MV)
           && !c->skip && varc>50<<8 && vard>10<<8){
            int dmin4= h263_mv4_search(s, mx, my, shift);
            if(dmin4 < dmin){
                mb_type= CANDIDATE_MB_TYPE_INTER4V;
                dmin=dmin4;
            }
        }
        if((s->flags&CODEC_FLAG_INTERLACED_ME)
           && !c->skip){ //FIXME varc/d checks
            int dmin_i= interlaced_search(s, 0, s->p_field_mv_table, s->p_field_select_table, mx, my, 0);
            if(dmin_i < dmin){
                mb_type = CANDIDATE_MB_TYPE_INTER_I;
                dmin= dmin_i;
            }
        }

//        pic->mb_cmp_score[s->mb_stride * mb_y + mb_x] = dmin;
        set_p_mv_tables(s, mx, my, mb_type!=CANDIDATE_MB_TYPE_INTER4V);

        /* get intra luma score */
        if((c->avctx->mb_cmp&0xFF)==FF_CMP_SSE){
            intra_score= varc - 500;
        }else{
            int mean= (sum+128)>>8;
            mean*= 0x01010101;

            for(i=0; i<16; i++){
                *(uint32_t*)(&c->scratchpad[i*s->linesize+ 0]) = mean;
                *(uint32_t*)(&c->scratchpad[i*s->linesize+ 4]) = mean;
                *(uint32_t*)(&c->scratchpad[i*s->linesize+ 8]) = mean;
                *(uint32_t*)(&c->scratchpad[i*s->linesize+12]) = mean;
            }

            intra_score= s->dsp.mb_cmp[0](s, c->scratchpad, pix, s->linesize, 16);
        }
#if 0 //FIXME
        /* get chroma score */
        if(c->avctx->mb_cmp&FF_CMP_CHROMA){
            for(i=1; i<3; i++){
                uint8_t *dest_c;
                int mean;

                if(s->out_format == FMT_H263){
                    mean= (s->dc_val[i][mb_x + mb_y*s->b8_stride] + 4)>>3; //FIXME not exact but simple ;)
                }else{
                    mean= (s->last_dc[i] + 4)>>3;
                }
                dest_c = s->new_picture.data[i] + (mb_y * 8  * (s->uvlinesize)) + mb_x * 8;

                mean*= 0x01010101;
                for(i=0; i<8; i++){
                    *(uint32_t*)(&c->scratchpad[i*s->uvlinesize+ 0]) = mean;
                    *(uint32_t*)(&c->scratchpad[i*s->uvlinesize+ 4]) = mean;
                }

                intra_score+= s->dsp.mb_cmp[1](s, c->scratchpad, dest_c, s->uvlinesize);
            }
        }
#endif
        intra_score += c->mb_penalty_factor*16;

        if(intra_score < dmin){
            mb_type= CANDIDATE_MB_TYPE_INTRA;
            s->current_picture.mb_type[mb_y*s->mb_stride + mb_x]= CANDIDATE_MB_TYPE_INTRA; //FIXME cleanup
        }else
            s->current_picture.mb_type[mb_y*s->mb_stride + mb_x]= 0;

        {
            int p_score= FFMIN(vard, varc-500+(s->lambda2>>FF_LAMBDA_SHIFT)*100);
            int i_score= varc-500+(s->lambda2>>FF_LAMBDA_SHIFT)*20;
            c->scene_change_score+= ff_sqrt(p_score) - ff_sqrt(i_score);
        }
    }

    s->mb_type[mb_y*s->mb_stride + mb_x]= mb_type;
}

int ff_pre_estimate_p_frame_motion(MpegEncContext * s,
                                    int mb_x, int mb_y)
{
    MotionEstContext * const c= &s->me;
    int mx, my, dmin;
    int P[10][2];
    const int shift= 1+s->quarter_sample;
    const int xy= mb_x + mb_y*s->mb_stride;
    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);

    c->pre_penalty_factor    = get_penalty_factor(s->lambda, s->lambda2, c->avctx->me_pre_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;

    P_LEFT[0]       = s->p_mv_table[xy + 1][0];
    P_LEFT[1]       = s->p_mv_table[xy + 1][1];

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

    /* special case for first line */
    if (s->first_slice_line) {
        c->pred_x= P_LEFT[0];
        c->pred_y= P_LEFT[1];
        P_TOP[0]= P_TOPRIGHT[0]= P_MEDIAN[0]=
        P_TOP[1]= P_TOPRIGHT[1]= P_MEDIAN[1]= 0; //FIXME
    } else {
        P_TOP[0]      = s->p_mv_table[xy + s->mb_stride    ][0];
        P_TOP[1]      = s->p_mv_table[xy + s->mb_stride    ][1];
        P_TOPRIGHT[0] = s->p_mv_table[xy + s->mb_stride - 1][0];
        P_TOPRIGHT[1] = s->p_mv_table[xy + s->mb_stride - 1][1];
        if(P_TOP[1]      < (c->ymin<<shift)) P_TOP[1]     = (c->ymin<<shift);
        if(P_TOPRIGHT[0] > (c->xmax<<shift)) P_TOPRIGHT[0]= (c->xmax<<shift);
        if(P_TOPRIGHT[1] < (c->ymin<<shift)) P_TOPRIGHT[1]= (c->ymin<<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]);

        c->pred_x = P_MEDIAN[0];
        c->pred_y = P_MEDIAN[1];
    }

    dmin = ff_epzs_motion_search(s, &mx, &my, P, 0, 0, s->p_mv_table, (1<<16)>>shift, 0, 16);

    s->p_mv_table[xy][0] = mx<<shift;
    s->p_mv_table[xy][1] = my<<shift;

    return dmin;
}

static int ff_estimate_motion_b(MpegEncContext * s,
                       int mb_x, int mb_y, int16_t (*mv_table)[2], int ref_index, int f_code)
{
    MotionEstContext * const c= &s->me;
    int mx, my, dmin;
    int P[10][2];
    const int shift= 1+s->quarter_sample;
    const int mot_stride = s->mb_stride;
    const int mot_xy = mb_y*mot_stride + mb_x;
    uint8_t * const mv_penalty= c->mv_penalty[f_code] + MAX_MV;
    int mv_scale;

    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= mv_penalty;

    get_limits(s, 16*mb_x, 16*mb_y);

    switch(s->me_method) {
    case ME_ZERO:
    default:
        no_motion_search(s, &mx, &my);
        dmin = 0;
        mx-= mb_x*16;
        my-= mb_y*16;
        break;
    case ME_X1:
    case ME_EPZS:
       {
            P_LEFT[0]        = mv_table[mot_xy - 1][0];
            P_LEFT[1]        = mv_table[mot_xy - 1][1];

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

            /* special case for first line */
            if (!s->first_slice_line) {
                P_TOP[0] = mv_table[mot_xy - mot_stride             ][0];
                P_TOP[1] = mv_table[mot_xy - mot_stride             ][1];
                P_TOPRIGHT[0] = mv_table[mot_xy - mot_stride + 1         ][0];
                P_TOPRIGHT[1] = mv_table[mot_xy - mot_stride + 1         ][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]);
            }
            c->pred_x= P_LEFT[0];
            c->pred_y= P_LEFT[1];
        }

        if(mv_table == s->b_forw_mv_table){
            mv_scale= (s->pb_time<<16) / (s->pp_time<<shift);
        }else{
            mv_scale= ((s->pb_time - s->pp_time)<<16) / (s->pp_time<<shift);
        }

        dmin = ff_epzs_motion_search(s, &mx, &my, P, 0, ref_index, s->p_mv_table, mv_scale, 0, 16);

        break;
    }

    dmin= c->sub_motion_search(s, &mx, &my, dmin, 0, ref_index, 0, 16);

    if(c->avctx->me_sub_cmp != c->avctx->mb_cmp && !c->skip)
        dmin= ff_get_mb_score(s, mx, my, 0, ref_index, 0, 16, 1);

//printf("%d %d %d %d//", s->mb_x, s->mb_y, mx, my);
//    s->mb_type[mb_y*s->mb_width + mb_x]= mb_type;
    mv_table[mot_xy][0]= mx;
    mv_table[mot_xy][1]= my;

    return dmin;
}

static inline int check_bidir_mv(MpegEncContext * s,
                   int motion_fx, int motion_fy,
                   int motion_bx, int motion_by,
                   int pred_fx, int pred_fy,
                   int pred_bx, int pred_by,
                   int size, int h)
{
    //FIXME optimize?
    //FIXME better f_code prediction (max mv & distance)
    //FIXME pointers
    MotionEstContext * const c= &s->me;
    uint8_t * const mv_penalty_f= c->mv_penalty[s->f_code] + MAX_MV; // f_code of the prev frame
    uint8_t * const mv_penalty_b= c->mv_penalty[s->b_code] + MAX_MV; // f_code of the prev frame
    int stride= c->stride;
    uint8_t *dest_y = c->scratchpad;
    uint8_t *ptr;
    int dxy;
    int src_x, src_y;
    int fbmin;
    uint8_t **src_data= c->src[0];
    uint8_t **ref_data= c->ref[0];
    uint8_t **ref2_data= c->ref[2];

    if(s->quarter_sample){
        dxy = ((motion_fy & 3) << 2) | (motion_fx & 3);
        src_x = motion_fx >> 2;
        src_y = motion_fy >> 2;

        ptr = ref_data[0] + (src_y * stride) + src_x;
        s->dsp.put_qpel_pixels_tab[0][dxy](dest_y    , ptr    , stride);

        dxy = ((motion_by & 3) << 2) | (motion_bx & 3);
        src_x = motion_bx >> 2;
        src_y = motion_by >> 2;

        ptr = ref2_data[0] + (src_y * stride) + src_x;
        s->dsp.avg_qpel_pixels_tab[size][dxy](dest_y    , ptr    , stride);
    }else{
        dxy = ((motion_fy & 1) << 1) | (motion_fx & 1);
        src_x = motion_fx >> 1;
        src_y = motion_fy >> 1;

        ptr = ref_data[0] + (src_y * stride) + src_x;
        s->dsp.put_pixels_tab[size][dxy](dest_y    , ptr    , stride, h);

        dxy = ((motion_by & 1) << 1) | (motion_bx & 1);
        src_x = motion_bx >> 1;