コード例 #1
0
ファイル: mpeg4video.c プロジェクト: BOTCrusher/sagetv
/**
 *
 * @return the mb_type
 */
int ff_mpeg4_set_direct_mv(MpegEncContext *s, int mx, int my){
    const int mb_index= s->mb_x + s->mb_y*s->mb_stride;
    const int colocated_mb_type= s->next_picture.mb_type[mb_index];
    uint16_t time_pp;
    uint16_t time_pb;
    int i;

    //FIXME avoid divides
    // try special case with shifts for 1 and 3 B-frames?

    if(IS_8X8(colocated_mb_type)){
        s->mv_type = MV_TYPE_8X8;
        for(i=0; i<4; i++){
            ff_mpeg4_set_one_direct_mv(s, mx, my, i);
        }
        return MB_TYPE_DIRECT2 | MB_TYPE_8x8 | MB_TYPE_L0L1;
    } else if(IS_INTERLACED(colocated_mb_type)){
        s->mv_type = MV_TYPE_FIELD;
        for(i=0; i<2; i++){
            int field_select= s->next_picture.ref_index[0][4*mb_index + 2*i];
            s->field_select[0][i]= field_select;
            s->field_select[1][i]= i;
            if(s->top_field_first){
                time_pp= s->pp_field_time - field_select + i;
                time_pb= s->pb_field_time - field_select + i;
            }else{
                time_pp= s->pp_field_time + field_select - i;
                time_pb= s->pb_field_time + field_select - i;
            }
            // NARFLEX: SageTV Fix divide by zero errors that can happen here
            s->mv[0][i][0] = (time_pp == 0) ? 0 : (s->p_field_mv_table[i][0][mb_index][0]*time_pb/time_pp + mx);
            s->mv[0][i][1] = (time_pp == 0) ? 0 : (s->p_field_mv_table[i][0][mb_index][1]*time_pb/time_pp + my);
            s->mv[1][i][0] = mx ? s->mv[0][i][0] - s->p_field_mv_table[i][0][mb_index][0]
                                : ((time_pp == 0) ? 0 : (s->p_field_mv_table[i][0][mb_index][0]*(time_pb - time_pp)/time_pp));
            s->mv[1][i][1] = my ? s->mv[0][i][1] - s->p_field_mv_table[i][0][mb_index][1]
                                : ((time_pp == 0) ? 0 : (s->p_field_mv_table[i][0][mb_index][1]*(time_pb - time_pp)/time_pp));
        }
        return MB_TYPE_DIRECT2 | MB_TYPE_16x8 | MB_TYPE_L0L1 | MB_TYPE_INTERLACED;
    }else{
        ff_mpeg4_set_one_direct_mv(s, mx, my, 0);
        s->mv[0][1][0] = s->mv[0][2][0] = s->mv[0][3][0] = s->mv[0][0][0];
        s->mv[0][1][1] = s->mv[0][2][1] = s->mv[0][3][1] = s->mv[0][0][1];
        s->mv[1][1][0] = s->mv[1][2][0] = s->mv[1][3][0] = s->mv[1][0][0];
        s->mv[1][1][1] = s->mv[1][2][1] = s->mv[1][3][1] = s->mv[1][0][1];
        if((s->avctx->workaround_bugs & FF_BUG_DIRECT_BLOCKSIZE) || !s->quarter_sample)
            s->mv_type= MV_TYPE_16X16;
        else
            s->mv_type= MV_TYPE_8X8;
        return MB_TYPE_DIRECT2 | MB_TYPE_16x16 | MB_TYPE_L0L1; //Note see prev line
    }
}
コード例 #2
0
ファイル: h264_direct.c プロジェクト: neerfri/FFmpeg
static void pred_spatial_direct_motion(H264Context * const h, int *mb_type){
    MpegEncContext * const s = &h->s;
    int b8_stride = 2;
    int b4_stride = h->b_stride;
    int mb_xy = h->mb_xy, mb_y = s->mb_y;
    int mb_type_col[2];
    const int16_t (*l1mv0)[2], (*l1mv1)[2];
    const int8_t *l1ref0, *l1ref1;
    const int is_b8x8 = IS_8X8(*mb_type);
    unsigned int sub_mb_type= MB_TYPE_L0L1;
    int i8, i4;
    int ref[2];
    int mv[2];
    int list;

    assert(h->ref_list[1][0].f.reference & 3);

    await_reference_mb_row(h, &h->ref_list[1][0], s->mb_y + !!IS_INTERLACED(*mb_type));

#define MB_TYPE_16x16_OR_INTRA (MB_TYPE_16x16|MB_TYPE_INTRA4x4|MB_TYPE_INTRA16x16|MB_TYPE_INTRA_PCM)


    /* ref = min(neighbors) */
    for(list=0; list<2; list++){
        int left_ref = h->ref_cache[list][scan8[0] - 1];
        int top_ref  = h->ref_cache[list][scan8[0] - 8];
        int refc = h->ref_cache[list][scan8[0] - 8 + 4];
        const int16_t *C= h->mv_cache[list][ scan8[0] - 8 + 4];
        if(refc == PART_NOT_AVAILABLE){
            refc = h->ref_cache[list][scan8[0] - 8 - 1];
            C    = h-> mv_cache[list][scan8[0] - 8 - 1];
        }
        ref[list] = FFMIN3((unsigned)left_ref, (unsigned)top_ref, (unsigned)refc);
        if(ref[list] >= 0){
            //this is just pred_motion() but with the cases removed that cannot happen for direct blocks
            const int16_t * const A= h->mv_cache[list][ scan8[0] - 1 ];
            const int16_t * const B= h->mv_cache[list][ scan8[0] - 8 ];

            int match_count= (left_ref==ref[list]) + (top_ref==ref[list]) + (refc==ref[list]);
            if(match_count > 1){ //most common
                mv[list]= pack16to32(mid_pred(A[0], B[0], C[0]),
                                     mid_pred(A[1], B[1], C[1]) );
            }else {
                assert(match_count==1);
                if(left_ref==ref[list]){
                    mv[list]= AV_RN32A(A);
                }else if(top_ref==ref[list]){
                    mv[list]= AV_RN32A(B);
                }else{
                    mv[list]= AV_RN32A(C);
                }
            }
        }else{
            int mask= ~(MB_TYPE_L0 << (2*list));
            mv[list] = 0;
            ref[list] = -1;
            if(!is_b8x8)
                *mb_type &= mask;
            sub_mb_type &= mask;
        }
    }
    if(ref[0] < 0 && ref[1] < 0){
        ref[0] = ref[1] = 0;
        if(!is_b8x8)
            *mb_type |= MB_TYPE_L0L1;
        sub_mb_type |= MB_TYPE_L0L1;
    }

    if(!(is_b8x8|mv[0]|mv[1])){
        fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, (uint8_t)ref[0], 1);
        fill_rectangle(&h->ref_cache[1][scan8[0]], 4, 4, 8, (uint8_t)ref[1], 1);
        fill_rectangle(&h->mv_cache[0][scan8[0]], 4, 4, 8, 0, 4);
        fill_rectangle(&h->mv_cache[1][scan8[0]], 4, 4, 8, 0, 4);
        *mb_type= (*mb_type & ~(MB_TYPE_8x8|MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_P1L0|MB_TYPE_P1L1))|MB_TYPE_16x16|MB_TYPE_DIRECT2;
        return;
    }

    if (IS_INTERLACED(h->ref_list[1][0].f.mb_type[mb_xy])) { // AFL/AFR/FR/FL -> AFL/FL
        if (!IS_INTERLACED(*mb_type)) {                          //     AFR/FR    -> AFL/FL
            mb_y = (s->mb_y&~1) + h->col_parity;
            mb_xy= s->mb_x + ((s->mb_y&~1) + h->col_parity)*s->mb_stride;
            b8_stride = 0;
        }else{
            mb_y  += h->col_fieldoff;
            mb_xy += s->mb_stride*h->col_fieldoff; // non zero for FL -> FL & differ parity
        }
        goto single_col;
    }else{                                               // AFL/AFR/FR/FL -> AFR/FR
        if(IS_INTERLACED(*mb_type)){                     // AFL       /FL -> AFR/FR
            mb_y = s->mb_y&~1;
            mb_xy= s->mb_x + (s->mb_y&~1)*s->mb_stride;
            mb_type_col[0] = h->ref_list[1][0].f.mb_type[mb_xy];
            mb_type_col[1] = h->ref_list[1][0].f.mb_type[mb_xy + s->mb_stride];
            b8_stride = 2+4*s->mb_stride;
            b4_stride *= 6;
            if (IS_INTERLACED(mb_type_col[0]) != IS_INTERLACED(mb_type_col[1])) {
                mb_type_col[0] &= ~MB_TYPE_INTERLACED;
                mb_type_col[1] &= ~MB_TYPE_INTERLACED;
            }

            sub_mb_type |= MB_TYPE_16x16|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
            if(    (mb_type_col[0] & MB_TYPE_16x16_OR_INTRA)
                && (mb_type_col[1] & MB_TYPE_16x16_OR_INTRA)
                && !is_b8x8){
                *mb_type   |= MB_TYPE_16x8 |MB_TYPE_DIRECT2; /* B_16x8 */
            }else{
                *mb_type   |= MB_TYPE_8x8;
            }
        }else{                                           //     AFR/FR    -> AFR/FR
single_col:
            mb_type_col[0] =
            mb_type_col[1] = h->ref_list[1][0].f.mb_type[mb_xy];

            sub_mb_type |= MB_TYPE_16x16|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
            if(!is_b8x8 && (mb_type_col[0] & MB_TYPE_16x16_OR_INTRA)){
                *mb_type   |= MB_TYPE_16x16|MB_TYPE_DIRECT2; /* B_16x16 */
            }else if(!is_b8x8 && (mb_type_col[0] & (MB_TYPE_16x8|MB_TYPE_8x16))){
                *mb_type   |= MB_TYPE_DIRECT2 | (mb_type_col[0] & (MB_TYPE_16x8|MB_TYPE_8x16));
            }else{
                if(!h->sps.direct_8x8_inference_flag){
                    /* FIXME save sub mb types from previous frames (or derive from MVs)
                    * so we know exactly what block size to use */
                    sub_mb_type += (MB_TYPE_8x8-MB_TYPE_16x16); /* B_SUB_4x4 */
                }
                *mb_type   |= MB_TYPE_8x8;
            }
        }
    }

    await_reference_mb_row(h, &h->ref_list[1][0], mb_y);

    l1mv0  = &h->ref_list[1][0].f.motion_val[0][h->mb2b_xy [mb_xy]];
    l1mv1  = &h->ref_list[1][0].f.motion_val[1][h->mb2b_xy [mb_xy]];
    l1ref0 = &h->ref_list[1][0].f.ref_index [0][4 * mb_xy];
    l1ref1 = &h->ref_list[1][0].f.ref_index [1][4 * mb_xy];
    if(!b8_stride){
        if(s->mb_y&1){
            l1ref0 += 2;
            l1ref1 += 2;
            l1mv0  +=  2*b4_stride;
            l1mv1  +=  2*b4_stride;
        }
    }


        if(IS_INTERLACED(*mb_type) != IS_INTERLACED(mb_type_col[0])){
            int n=0;
            for(i8=0; i8<4; i8++){
                int x8 = i8&1;
                int y8 = i8>>1;
                int xy8 = x8+y8*b8_stride;
                int xy4 = 3*x8+y8*b4_stride;
                int a,b;

                if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
                    continue;
                h->sub_mb_type[i8] = sub_mb_type;

                fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[0], 1);
                fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[1], 1);
                if(!IS_INTRA(mb_type_col[y8]) && !h->ref_list[1][0].long_ref
                   && (   (l1ref0[xy8] == 0 && FFABS(l1mv0[xy4][0]) <= 1 && FFABS(l1mv0[xy4][1]) <= 1)
                       || (l1ref0[xy8]  < 0 && l1ref1[xy8] == 0 && FFABS(l1mv1[xy4][0]) <= 1 && FFABS(l1mv1[xy4][1]) <= 1))){
                    a=b=0;
                    if(ref[0] > 0)
                        a= mv[0];
                    if(ref[1] > 0)
                        b= mv[1];
                    n++;
                }else{
                    a= mv[0];
                    b= mv[1];
                }
                fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, a, 4);
                fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, b, 4);
            }
            if(!is_b8x8 && !(n&3))
                *mb_type= (*mb_type & ~(MB_TYPE_8x8|MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_P1L0|MB_TYPE_P1L1))|MB_TYPE_16x16|MB_TYPE_DIRECT2;
        }else if(IS_16X16(*mb_type)){