static int decode_mb_cabac(H264Context *h) {
    MpegEncContext * const s = &h->s;
    const int mb_xy= s->mb_x + s->mb_y*s->mb_stride;
    int mb_type, partition_count, cbp = 0;
    int dct8x8_allowed= h->pps.transform_8x8_mode;
    s->dsp.clear_blocks(h->mb);
    tprintf(s->avctx, "pic:%d mb:%d/%d\n", h->frame_num, s->mb_x, s->mb_y);
    if( h->slice_type != FF_I_TYPE && h->slice_type != FF_SI_TYPE ) {
        int skip;
        if( FRAME_MBAFF && s->mb_x==0 && (s->mb_y&1)==0 )
            predict_field_decoding_flag(h);
        if( FRAME_MBAFF && (s->mb_y&1)==1 && h->prev_mb_skipped )
            skip = h->next_mb_skipped;
        else
            skip = decode_cabac_mb_skip( h, s->mb_x, s->mb_y );
        if( skip ) {
            if( FRAME_MBAFF && (s->mb_y&1)==0 ){
                s->current_picture.mb_type[mb_xy] = MB_TYPE_SKIP;
                h->next_mb_skipped = decode_cabac_mb_skip( h, s->mb_x, s->mb_y+1 );
                if(h->next_mb_skipped)
                    predict_field_decoding_flag(h);
                else
                    h->mb_mbaff = h->mb_field_decoding_flag = decode_cabac_field_decoding_flag(h);
            }
            decode_mb_skip(h);
            h->cbp_table[mb_xy] = 0;
            h->chroma_pred_mode_table[mb_xy] = 0;
            h->last_qscale_diff = 0;
            return 0;
        }
    }
    if(FRAME_MBAFF){
        if( (s->mb_y&1) == 0 )
            h->mb_mbaff =
            h->mb_field_decoding_flag = decode_cabac_field_decoding_flag(h);
    }else
        h->mb_field_decoding_flag= (s->picture_structure!=PICT_FRAME);
    h->prev_mb_skipped = 0;
    compute_mb_neighbors(h);
    if( ( mb_type = decode_cabac_mb_type( h ) ) < 0 ) {
        av_log( h->s.avctx, AV_LOG_ERROR, "decode_cabac_mb_type failed\n" );
        return -1;
    }
    if( h->slice_type == FF_B_TYPE ) {
        if( mb_type < 23 ){
            partition_count= b_mb_type_info[mb_type].partition_count;
            mb_type=         b_mb_type_info[mb_type].type;
        }else{
            mb_type -= 23;
            goto decode_intra_mb;
        }
    } else if( h->slice_type == FF_P_TYPE ) {
        if( mb_type < 5) {
            partition_count= p_mb_type_info[mb_type].partition_count;
            mb_type=         p_mb_type_info[mb_type].type;
        } else {
            mb_type -= 5;
            goto decode_intra_mb;
        }
    } else {
       assert(h->slice_type == FF_I_TYPE);
decode_intra_mb:
        partition_count = 0;
        cbp= i_mb_type_info[mb_type].cbp;
        h->intra16x16_pred_mode= i_mb_type_info[mb_type].pred_mode;
        mb_type= i_mb_type_info[mb_type].type;
    }
    if(MB_FIELD)
        mb_type |= MB_TYPE_INTERLACED;
    h->slice_table[ mb_xy ]= h->slice_num;
    if(IS_INTRA_PCM(mb_type)) {
        const uint8_t *ptr;
        unsigned int x, y;
        ptr= h->cabac.bytestream;
        if(h->cabac.low&0x1) ptr--;
        if(CABAC_BITS==16){
            if(h->cabac.low&0x1FF) ptr--;
        }
        for(y=0; y<16; y++){
            const int index= 4*(y&3) + 32*((y>>2)&1) + 128*(y>>3);
            for(x=0; x<16; x++){
                tprintf(s->avctx, "LUMA ICPM LEVEL (%3d)\n", *ptr);
                h->mb[index + (x&3) + 16*((x>>2)&1) + 64*(x>>3)]= *ptr++;
            }
        }
        for(y=0; y<8; y++){
            const int index= 256 + 4*(y&3) + 32*(y>>2);
            for(x=0; x<8; x++){
                tprintf(s->avctx, "CHROMA U ICPM LEVEL (%3d)\n", *ptr);
                h->mb[index + (x&3) + 16*(x>>2)]= *ptr++;
            }
        }
        for(y=0; y<8; y++){
            const int index= 256 + 64 + 4*(y&3) + 32*(y>>2);
            for(x=0; x<8; x++){
                tprintf(s->avctx, "CHROMA V ICPM LEVEL (%3d)\n", *ptr);
                h->mb[index + (x&3) + 16*(x>>2)]= *ptr++;
            }
        }
        ff_init_cabac_decoder(&h->cabac, ptr, h->cabac.bytestream_end - ptr);
        h->cbp_table[mb_xy] = 0x1ef;
        h->chroma_pred_mode_table[mb_xy] = 0;
        s->current_picture.qscale_table[mb_xy]= 0;
        h->chroma_qp[0] = get_chroma_qp(h, 0, 0);
        h->chroma_qp[1] = get_chroma_qp(h, 1, 0);
        memset(h->non_zero_count[mb_xy], 16, 16);
        s->current_picture.mb_type[mb_xy]= mb_type;
        return 0;
    }
    if(MB_MBAFF){
        h->ref_count[0] <<= 1;
        h->ref_count[1] <<= 1;
    }
    fill_caches(h, mb_type, 0);
    if( IS_INTRA( mb_type ) ) {
        int i, pred_mode;
        if( IS_INTRA4x4( mb_type ) ) {
            if( dct8x8_allowed && decode_cabac_mb_transform_size( h ) ) {
                mb_type |= MB_TYPE_8x8DCT;
                for( i = 0; i < 16; i+=4 ) {
                    int pred = pred_intra_mode( h, i );
                    int mode = decode_cabac_mb_intra4x4_pred_mode( h, pred );
                    fill_rectangle( &h->intra4x4_pred_mode_cache[ scan8[i] ], 2, 2, 8, mode, 1 );
                }
            } else {
                for( i = 0; i < 16; i++ ) {
                    int pred = pred_intra_mode( h, i );
                    h->intra4x4_pred_mode_cache[ scan8[i] ] = decode_cabac_mb_intra4x4_pred_mode( h, pred );
                }
            }
            write_back_intra_pred_mode(h);
            if( check_intra4x4_pred_mode(h) < 0 ) return -1;
        } else {
            h->intra16x16_pred_mode= check_intra_pred_mode( h, h->intra16x16_pred_mode );
            if( h->intra16x16_pred_mode < 0 ) return -1;
        }
        h->chroma_pred_mode_table[mb_xy] =
        pred_mode                        = decode_cabac_mb_chroma_pre_mode( h );
        pred_mode= check_intra_pred_mode( h, pred_mode );
        if( pred_mode < 0 ) return -1;
        h->chroma_pred_mode= pred_mode;
    } else if( partition_count == 4 ) {
        int i, j, sub_partition_count[4], list, ref[2][4];
        if( h->slice_type == FF_B_TYPE ) {
            for( i = 0; i < 4; i++ ) {
                h->sub_mb_type[i] = decode_cabac_b_mb_sub_type( h );
                sub_partition_count[i]= b_sub_mb_type_info[ h->sub_mb_type[i] ].partition_count;
                h->sub_mb_type[i]=      b_sub_mb_type_info[ h->sub_mb_type[i] ].type;
            }
            if( IS_DIRECT(h->sub_mb_type[0] | h->sub_mb_type[1] |
                          h->sub_mb_type[2] | h->sub_mb_type[3]) ) {
                pred_direct_motion(h, &mb_type);
                h->ref_cache[0][scan8[4]] =
                h->ref_cache[1][scan8[4]] =
                h->ref_cache[0][scan8[12]] =
                h->ref_cache[1][scan8[12]] = PART_NOT_AVAILABLE;
                if( h->ref_count[0] > 1 || h->ref_count[1] > 1 ) {
                    for( i = 0; i < 4; i++ )
                        if( IS_DIRECT(h->sub_mb_type[i]) )
                            fill_rectangle( &h->direct_cache[scan8[4*i]], 2, 2, 8, 1, 1 );
                }
            }
        } else {
            for( i = 0; i < 4; i++ ) {
                h->sub_mb_type[i] = decode_cabac_p_mb_sub_type( h );
                sub_partition_count[i]= p_sub_mb_type_info[ h->sub_mb_type[i] ].partition_count;
                h->sub_mb_type[i]=      p_sub_mb_type_info[ h->sub_mb_type[i] ].type;
            }
        }
        for( list = 0; list < h->list_count; list++ ) {
                for( i = 0; i < 4; i++ ) {
                    if(IS_DIRECT(h->sub_mb_type[i])) continue;
                    if(IS_DIR(h->sub_mb_type[i], 0, list)){
                        if( h->ref_count[list] > 1 )
                            ref[list][i] = decode_cabac_mb_ref( h, list, 4*i );
                        else
                            ref[list][i] = 0;
                    } else {
                        ref[list][i] = -1;
                    }
                                                       h->ref_cache[list][ scan8[4*i]+1 ]=
                    h->ref_cache[list][ scan8[4*i]+8 ]=h->ref_cache[list][ scan8[4*i]+9 ]= ref[list][i];
                }
        }
        if(dct8x8_allowed)
            dct8x8_allowed = get_dct8x8_allowed(h);
        for(list=0; list<h->list_count; list++){
            for(i=0; i<4; i++){
                h->ref_cache[list][ scan8[4*i]   ]=h->ref_cache[list][ scan8[4*i]+1 ];
                if(IS_DIRECT(h->sub_mb_type[i])){
                    fill_rectangle(h->mvd_cache[list][scan8[4*i]], 2, 2, 8, 0, 4);
                    continue;
                }
                if(IS_DIR(h->sub_mb_type[i], 0, list) && !IS_DIRECT(h->sub_mb_type[i])){
                    const int sub_mb_type= h->sub_mb_type[i];
                    const int block_width= (sub_mb_type & (MB_TYPE_16x16|MB_TYPE_16x8)) ? 2 : 1;
                    for(j=0; j<sub_partition_count[i]; j++){
                        int mpx, mpy;
                        int mx, my;
                        const int index= 4*i + block_width*j;
                        int16_t (* mv_cache)[2]= &h->mv_cache[list][ scan8[index] ];
                        int16_t (* mvd_cache)[2]= &h->mvd_cache[list][ scan8[index] ];
                        pred_motion(h, index, block_width, list, h->ref_cache[list][ scan8[index] ], &mpx, &mpy);
                        mx = mpx + decode_cabac_mb_mvd( h, list, index, 0 );
                        my = mpy + decode_cabac_mb_mvd( h, list, index, 1 );
                        tprintf(s->avctx, "final mv:%d %d\n", mx, my);
                        if(IS_SUB_8X8(sub_mb_type)){
                            mv_cache[ 1 ][0]=
                            mv_cache[ 8 ][0]= mv_cache[ 9 ][0]= mx;
                            mv_cache[ 1 ][1]=
                            mv_cache[ 8 ][1]= mv_cache[ 9 ][1]= my;
                            mvd_cache[ 1 ][0]=
                            mvd_cache[ 8 ][0]= mvd_cache[ 9 ][0]= mx - mpx;
                            mvd_cache[ 1 ][1]=
                            mvd_cache[ 8 ][1]= mvd_cache[ 9 ][1]= my - mpy;
                        }else if(IS_SUB_8X4(sub_mb_type)){
                            mv_cache[ 1 ][0]= mx;
                            mv_cache[ 1 ][1]= my;
                            mvd_cache[ 1 ][0]= mx - mpx;
                            mvd_cache[ 1 ][1]= my - mpy;
                        }else if(IS_SUB_4X8(sub_mb_type)){
                            mv_cache[ 8 ][0]= mx;
                            mv_cache[ 8 ][1]= my;
                            mvd_cache[ 8 ][0]= mx - mpx;
                            mvd_cache[ 8 ][1]= my - mpy;
                        }
                        mv_cache[ 0 ][0]= mx;
                        mv_cache[ 0 ][1]= my;
                        mvd_cache[ 0 ][0]= mx - mpx;
                        mvd_cache[ 0 ][1]= my - mpy;
                    }
                }else{
                    uint32_t *p= (uint32_t *)&h->mv_cache[list][ scan8[4*i] ][0];
                    uint32_t *pd= (uint32_t *)&h->mvd_cache[list][ scan8[4*i] ][0];
                    p[0] = p[1] = p[8] = p[9] = 0;
                    pd[0]= pd[1]= pd[8]= pd[9]= 0;
                }
            }
        }
    } else if( IS_DIRECT(mb_type) ) {
        pred_direct_motion(h, &mb_type);
        fill_rectangle(h->mvd_cache[0][scan8[0]], 4, 4, 8, 0, 4);
        fill_rectangle(h->mvd_cache[1][scan8[0]], 4, 4, 8, 0, 4);
        dct8x8_allowed &= h->sps.direct_8x8_inference_flag;
    } else {
        int list, mx, my, i, mpx, mpy;
        if(IS_16X16(mb_type)){
            for(list=0; list<h->list_count; list++){
                if(IS_DIR(mb_type, 0, list)){
                        const int ref = h->ref_count[list] > 1 ? decode_cabac_mb_ref( h, list, 0 ) : 0;
                        fill_rectangle(&h->ref_cache[list][ scan8[0] ], 4, 4, 8, ref, 1);
                }else
                    fill_rectangle(&h->ref_cache[list][ scan8[0] ], 4, 4, 8, (uint8_t)LIST_NOT_USED, 1);
            }
            for(list=0; list<h->list_count; list++){
                if(IS_DIR(mb_type, 0, list)){
                    pred_motion(h, 0, 4, list, h->ref_cache[list][ scan8[0] ], &mpx, &mpy);
                    mx = mpx + decode_cabac_mb_mvd( h, list, 0, 0 );
                    my = mpy + decode_cabac_mb_mvd( h, list, 0, 1 );
                    tprintf(s->avctx, "final mv:%d %d\n", mx, my);
                    fill_rectangle(h->mvd_cache[list][ scan8[0] ], 4, 4, 8, pack16to32(mx-mpx,my-mpy), 4);
                    fill_rectangle(h->mv_cache[list][ scan8[0] ], 4, 4, 8, pack16to32(mx,my), 4);
                }else
                    fill_rectangle(h->mv_cache[list][ scan8[0] ], 4, 4, 8, 0, 4);
            }
        }
        else if(IS_16X8(mb_type)){
            for(list=0; list<h->list_count; list++){
                    for(i=0; i<2; i++){
                        if(IS_DIR(mb_type, i, list)){
                            const int ref= h->ref_count[list] > 1 ? decode_cabac_mb_ref( h, list, 8*i ) : 0;
                            fill_rectangle(&h->ref_cache[list][ scan8[0] + 16*i ], 4, 2, 8, ref, 1);
                        }else
                            fill_rectangle(&h->ref_cache[list][ scan8[0] + 16*i ], 4, 2, 8, (LIST_NOT_USED&0xFF), 1);
                    }
            }
            for(list=0; list<h->list_count; list++){
                for(i=0; i<2; i++){
                    if(IS_DIR(mb_type, i, list)){
                        pred_16x8_motion(h, 8*i, list, h->ref_cache[list][scan8[0] + 16*i], &mpx, &mpy);
                        mx = mpx + decode_cabac_mb_mvd( h, list, 8*i, 0 );
                        my = mpy + decode_cabac_mb_mvd( h, list, 8*i, 1 );
                        tprintf(s->avctx, "final mv:%d %d\n", mx, my);
                        fill_rectangle(h->mvd_cache[list][ scan8[0] + 16*i ], 4, 2, 8, pack16to32(mx-mpx,my-mpy), 4);
                        fill_rectangle(h->mv_cache[list][ scan8[0] + 16*i ], 4, 2, 8, pack16to32(mx,my), 4);
                    }else{
                        fill_rectangle(h->mvd_cache[list][ scan8[0] + 16*i ], 4, 2, 8, 0, 4);
                        fill_rectangle(h-> mv_cache[list][ scan8[0] + 16*i ], 4, 2, 8, 0, 4);
                    }
                }
            }
        }else{
            assert(IS_8X16(mb_type));
            for(list=0; list<h->list_count; list++){
                    for(i=0; i<2; i++){
                        if(IS_DIR(mb_type, i, list)){
                            const int ref= h->ref_count[list] > 1 ? decode_cabac_mb_ref( h, list, 4*i ) : 0;
                            fill_rectangle(&h->ref_cache[list][ scan8[0] + 2*i ], 2, 4, 8, ref, 1);
                        }else
                            fill_rectangle(&h->ref_cache[list][ scan8[0] + 2*i ], 2, 4, 8, (LIST_NOT_USED&0xFF), 1);
                    }
            }
            for(list=0; list<h->list_count; list++){
                for(i=0; i<2; i++){
                    if(IS_DIR(mb_type, i, list)){
                        pred_8x16_motion(h, i*4, list, h->ref_cache[list][ scan8[0] + 2*i ], &mpx, &mpy);
                        mx = mpx + decode_cabac_mb_mvd( h, list, 4*i, 0 );
                        my = mpy + decode_cabac_mb_mvd( h, list, 4*i, 1 );
                        tprintf(s->avctx, "final mv:%d %d\n", mx, my);
                        fill_rectangle(h->mvd_cache[list][ scan8[0] + 2*i ], 2, 4, 8, pack16to32(mx-mpx,my-mpy), 4);
                        fill_rectangle(h->mv_cache[list][ scan8[0] + 2*i ], 2, 4, 8, pack16to32(mx,my), 4);
                    }else{
                        fill_rectangle(h->mvd_cache[list][ scan8[0] + 2*i ], 2, 4, 8, 0, 4);
                        fill_rectangle(h-> mv_cache[list][ scan8[0] + 2*i ], 2, 4, 8, 0, 4);
                    }
                }
            }
        }
    }
   if( IS_INTER( mb_type ) ) {
        h->chroma_pred_mode_table[mb_xy] = 0;
        write_back_motion( h, mb_type );
   }
    if( !IS_INTRA16x16( mb_type ) ) {
        cbp  = decode_cabac_mb_cbp_luma( h );
        cbp |= decode_cabac_mb_cbp_chroma( h ) << 4;
    }
    h->cbp_table[mb_xy] = h->cbp = cbp;
    if( dct8x8_allowed && (cbp&15) && !IS_INTRA( mb_type ) ) {
        if( decode_cabac_mb_transform_size( h ) )
            mb_type |= MB_TYPE_8x8DCT;
    }
    s->current_picture.mb_type[mb_xy]= mb_type;
    if( cbp || IS_INTRA16x16( mb_type ) ) {
        const uint8_t *scan, *scan8x8, *dc_scan;
        const uint32_t *qmul;
        int dqp;
        if(IS_INTERLACED(mb_type)){
            scan8x8= s->qscale ? h->field_scan8x8 : h->field_scan8x8_q0;
            scan= s->qscale ? h->field_scan : h->field_scan_q0;
            dc_scan= luma_dc_field_scan;
        }else{
            scan8x8= s->qscale ? h->zigzag_scan8x8 : h->zigzag_scan8x8_q0;
            scan= s->qscale ? h->zigzag_scan : h->zigzag_scan_q0;
            dc_scan= luma_dc_zigzag_scan;
        }
        h->last_qscale_diff = dqp = decode_cabac_mb_dqp( h );
        if( dqp == INT_MIN ){
            av_log(h->s.avctx, AV_LOG_ERROR, "cabac decode of qscale diff failed at %d %d\n", s->mb_x, s->mb_y);
            return -1;
        }
        s->qscale += dqp;
        if(((unsigned)s->qscale) > 51){
            if(s->qscale<0) s->qscale+= 52;
            else            s->qscale-= 52;
        }
        h->chroma_qp[0] = get_chroma_qp(h, 0, s->qscale);
        h->chroma_qp[1] = get_chroma_qp(h, 1, s->qscale);
        if( IS_INTRA16x16( mb_type ) ) {
            int i;
            decode_cabac_residual( h, h->mb, 0, 0, dc_scan, NULL, 16);
            if( cbp&15 ) {
                qmul = h->dequant4_coeff[0][s->qscale];
                for( i = 0; i < 16; i++ ) {
                    decode_cabac_residual(h, h->mb + 16*i, 1, i, scan + 1, qmul, 15);
                }
            } else {
                fill_rectangle(&h->non_zero_count_cache[scan8[0]], 4, 4, 8, 0, 1);
            }
        } else {
            int i8x8, i4x4;
            for( i8x8 = 0; i8x8 < 4; i8x8++ ) {
                if( cbp & (1<<i8x8) ) {
                    if( IS_8x8DCT(mb_type) ) {
                        decode_cabac_residual(h, h->mb + 64*i8x8, 5, 4*i8x8,
                            scan8x8, h->dequant8_coeff[IS_INTRA( mb_type ) ? 0:1][s->qscale], 64);
                    } else {
                        qmul = h->dequant4_coeff[IS_INTRA( mb_type ) ? 0:3][s->qscale];
                        for( i4x4 = 0; i4x4 < 4; i4x4++ ) {
                            const int index = 4*i8x8 + i4x4;
                            decode_cabac_residual(h, h->mb + 16*index, 2, index, scan, qmul, 16);
                        }
                    }
                } else {
                    uint8_t * const nnz= &h->non_zero_count_cache[ scan8[4*i8x8] ];
                    nnz[0] = nnz[1] = nnz[8] = nnz[9] = 0;
                }
            }
        }
        if( cbp&0x30 ){
            int c;
            for( c = 0; c < 2; c++ ) {
                decode_cabac_residual(h, h->mb + 256 + 16*4*c, 3, c, chroma_dc_scan, NULL, 4);
            }
        }
        if( cbp&0x20 ) {
            int c, i;
            for( c = 0; c < 2; c++ ) {
                qmul = h->dequant4_coeff[c+1+(IS_INTRA( mb_type ) ? 0:3)][h->chroma_qp[c]];
                for( i = 0; i < 4; i++ ) {
                    const int index = 16 + 4 * c + i;
                    decode_cabac_residual(h, h->mb + 16*index, 4, index - 16, scan + 1, qmul, 15);
                }
            }
        } else {
            uint8_t * const nnz= &h->non_zero_count_cache[0];
            nnz[ scan8[16]+0 ] = nnz[ scan8[16]+1 ] =nnz[ scan8[16]+8 ] =nnz[ scan8[16]+9 ] =
            nnz[ scan8[20]+0 ] = nnz[ scan8[20]+1 ] =nnz[ scan8[20]+8 ] =nnz[ scan8[20]+9 ] = 0;
        }
    } else {
        uint8_t * const nnz= &h->non_zero_count_cache[0];
        fill_rectangle(&nnz[scan8[0]], 4, 4, 8, 0, 1);
        nnz[ scan8[16]+0 ] = nnz[ scan8[16]+1 ] =nnz[ scan8[16]+8 ] =nnz[ scan8[16]+9 ] =
        nnz[ scan8[20]+0 ] = nnz[ scan8[20]+1 ] =nnz[ scan8[20]+8 ] =nnz[ scan8[20]+9 ] = 0;
        h->last_qscale_diff = 0;
    }
    s->current_picture.qscale_table[mb_xy]= s->qscale;
    write_back_non_zero_count(h);
    if(MB_MBAFF){
        h->ref_count[0] >>= 1;
        h->ref_count[1] >>= 1;
    }
    return 0;
}
['static int decode_mb_cabac(H264Context *h) {\n    MpegEncContext * const s = &h->s;\n    const int mb_xy= s->mb_x + s->mb_y*s->mb_stride;\n    int mb_type, partition_count, cbp = 0;\n    int dct8x8_allowed= h->pps.transform_8x8_mode;\n    s->dsp.clear_blocks(h->mb);\n    tprintf(s->avctx, "pic:%d mb:%d/%d\\n", h->frame_num, s->mb_x, s->mb_y);\n    if( h->slice_type != FF_I_TYPE && h->slice_type != FF_SI_TYPE ) {\n        int skip;\n        if( FRAME_MBAFF && s->mb_x==0 && (s->mb_y&1)==0 )\n            predict_field_decoding_flag(h);\n        if( FRAME_MBAFF && (s->mb_y&1)==1 && h->prev_mb_skipped )\n            skip = h->next_mb_skipped;\n        else\n            skip = decode_cabac_mb_skip( h, s->mb_x, s->mb_y );\n        if( skip ) {\n            if( FRAME_MBAFF && (s->mb_y&1)==0 ){\n                s->current_picture.mb_type[mb_xy] = MB_TYPE_SKIP;\n                h->next_mb_skipped = decode_cabac_mb_skip( h, s->mb_x, s->mb_y+1 );\n                if(h->next_mb_skipped)\n                    predict_field_decoding_flag(h);\n                else\n                    h->mb_mbaff = h->mb_field_decoding_flag = decode_cabac_field_decoding_flag(h);\n            }\n            decode_mb_skip(h);\n            h->cbp_table[mb_xy] = 0;\n            h->chroma_pred_mode_table[mb_xy] = 0;\n            h->last_qscale_diff = 0;\n            return 0;\n        }\n    }\n    if(FRAME_MBAFF){\n        if( (s->mb_y&1) == 0 )\n            h->mb_mbaff =\n            h->mb_field_decoding_flag = decode_cabac_field_decoding_flag(h);\n    }else\n        h->mb_field_decoding_flag= (s->picture_structure!=PICT_FRAME);\n    h->prev_mb_skipped = 0;\n    compute_mb_neighbors(h);\n    if( ( mb_type = decode_cabac_mb_type( h ) ) < 0 ) {\n        av_log( h->s.avctx, AV_LOG_ERROR, "decode_cabac_mb_type failed\\n" );\n        return -1;\n    }\n    if( h->slice_type == FF_B_TYPE ) {\n        if( mb_type < 23 ){\n            partition_count= b_mb_type_info[mb_type].partition_count;\n            mb_type=         b_mb_type_info[mb_type].type;\n        }else{\n            mb_type -= 23;\n            goto decode_intra_mb;\n        }\n    } else if( h->slice_type == FF_P_TYPE ) {\n        if( mb_type < 5) {\n            partition_count= p_mb_type_info[mb_type].partition_count;\n            mb_type=         p_mb_type_info[mb_type].type;\n        } else {\n            mb_type -= 5;\n            goto decode_intra_mb;\n        }\n    } else {\n       assert(h->slice_type == FF_I_TYPE);\ndecode_intra_mb:\n        partition_count = 0;\n        cbp= i_mb_type_info[mb_type].cbp;\n        h->intra16x16_pred_mode= i_mb_type_info[mb_type].pred_mode;\n        mb_type= i_mb_type_info[mb_type].type;\n    }\n    if(MB_FIELD)\n        mb_type |= MB_TYPE_INTERLACED;\n    h->slice_table[ mb_xy ]= h->slice_num;\n    if(IS_INTRA_PCM(mb_type)) {\n        const uint8_t *ptr;\n        unsigned int x, y;\n        ptr= h->cabac.bytestream;\n        if(h->cabac.low&0x1) ptr--;\n        if(CABAC_BITS==16){\n            if(h->cabac.low&0x1FF) ptr--;\n        }\n        for(y=0; y<16; y++){\n            const int index= 4*(y&3) + 32*((y>>2)&1) + 128*(y>>3);\n            for(x=0; x<16; x++){\n                tprintf(s->avctx, "LUMA ICPM LEVEL (%3d)\\n", *ptr);\n                h->mb[index + (x&3) + 16*((x>>2)&1) + 64*(x>>3)]= *ptr++;\n            }\n        }\n        for(y=0; y<8; y++){\n            const int index= 256 + 4*(y&3) + 32*(y>>2);\n            for(x=0; x<8; x++){\n                tprintf(s->avctx, "CHROMA U ICPM LEVEL (%3d)\\n", *ptr);\n                h->mb[index + (x&3) + 16*(x>>2)]= *ptr++;\n            }\n        }\n        for(y=0; y<8; y++){\n            const int index= 256 + 64 + 4*(y&3) + 32*(y>>2);\n            for(x=0; x<8; x++){\n                tprintf(s->avctx, "CHROMA V ICPM LEVEL (%3d)\\n", *ptr);\n                h->mb[index + (x&3) + 16*(x>>2)]= *ptr++;\n            }\n        }\n        ff_init_cabac_decoder(&h->cabac, ptr, h->cabac.bytestream_end - ptr);\n        h->cbp_table[mb_xy] = 0x1ef;\n        h->chroma_pred_mode_table[mb_xy] = 0;\n        s->current_picture.qscale_table[mb_xy]= 0;\n        h->chroma_qp[0] = get_chroma_qp(h, 0, 0);\n        h->chroma_qp[1] = get_chroma_qp(h, 1, 0);\n        memset(h->non_zero_count[mb_xy], 16, 16);\n        s->current_picture.mb_type[mb_xy]= mb_type;\n        return 0;\n    }\n    if(MB_MBAFF){\n        h->ref_count[0] <<= 1;\n        h->ref_count[1] <<= 1;\n    }\n    fill_caches(h, mb_type, 0);\n    if( IS_INTRA( mb_type ) ) {\n        int i, pred_mode;\n        if( IS_INTRA4x4( mb_type ) ) {\n            if( dct8x8_allowed && decode_cabac_mb_transform_size( h ) ) {\n                mb_type |= MB_TYPE_8x8DCT;\n                for( i = 0; i < 16; i+=4 ) {\n                    int pred = pred_intra_mode( h, i );\n                    int mode = decode_cabac_mb_intra4x4_pred_mode( h, pred );\n                    fill_rectangle( &h->intra4x4_pred_mode_cache[ scan8[i] ], 2, 2, 8, mode, 1 );\n                }\n            } else {\n                for( i = 0; i < 16; i++ ) {\n                    int pred = pred_intra_mode( h, i );\n                    h->intra4x4_pred_mode_cache[ scan8[i] ] = decode_cabac_mb_intra4x4_pred_mode( h, pred );\n                }\n            }\n            write_back_intra_pred_mode(h);\n            if( check_intra4x4_pred_mode(h) < 0 ) return -1;\n        } else {\n            h->intra16x16_pred_mode= check_intra_pred_mode( h, h->intra16x16_pred_mode );\n            if( h->intra16x16_pred_mode < 0 ) return -1;\n        }\n        h->chroma_pred_mode_table[mb_xy] =\n        pred_mode                        = decode_cabac_mb_chroma_pre_mode( h );\n        pred_mode= check_intra_pred_mode( h, pred_mode );\n        if( pred_mode < 0 ) return -1;\n        h->chroma_pred_mode= pred_mode;\n    } else if( partition_count == 4 ) {\n        int i, j, sub_partition_count[4], list, ref[2][4];\n        if( h->slice_type == FF_B_TYPE ) {\n            for( i = 0; i < 4; i++ ) {\n                h->sub_mb_type[i] = decode_cabac_b_mb_sub_type( h );\n                sub_partition_count[i]= b_sub_mb_type_info[ h->sub_mb_type[i] ].partition_count;\n                h->sub_mb_type[i]=      b_sub_mb_type_info[ h->sub_mb_type[i] ].type;\n            }\n            if( IS_DIRECT(h->sub_mb_type[0] | h->sub_mb_type[1] |\n                          h->sub_mb_type[2] | h->sub_mb_type[3]) ) {\n                pred_direct_motion(h, &mb_type);\n                h->ref_cache[0][scan8[4]] =\n                h->ref_cache[1][scan8[4]] =\n                h->ref_cache[0][scan8[12]] =\n                h->ref_cache[1][scan8[12]] = PART_NOT_AVAILABLE;\n                if( h->ref_count[0] > 1 || h->ref_count[1] > 1 ) {\n                    for( i = 0; i < 4; i++ )\n                        if( IS_DIRECT(h->sub_mb_type[i]) )\n                            fill_rectangle( &h->direct_cache[scan8[4*i]], 2, 2, 8, 1, 1 );\n                }\n            }\n        } else {\n            for( i = 0; i < 4; i++ ) {\n                h->sub_mb_type[i] = decode_cabac_p_mb_sub_type( h );\n                sub_partition_count[i]= p_sub_mb_type_info[ h->sub_mb_type[i] ].partition_count;\n                h->sub_mb_type[i]=      p_sub_mb_type_info[ h->sub_mb_type[i] ].type;\n            }\n        }\n        for( list = 0; list < h->list_count; list++ ) {\n                for( i = 0; i < 4; i++ ) {\n                    if(IS_DIRECT(h->sub_mb_type[i])) continue;\n                    if(IS_DIR(h->sub_mb_type[i], 0, list)){\n                        if( h->ref_count[list] > 1 )\n                            ref[list][i] = decode_cabac_mb_ref( h, list, 4*i );\n                        else\n                            ref[list][i] = 0;\n                    } else {\n                        ref[list][i] = -1;\n                    }\n                                                       h->ref_cache[list][ scan8[4*i]+1 ]=\n                    h->ref_cache[list][ scan8[4*i]+8 ]=h->ref_cache[list][ scan8[4*i]+9 ]= ref[list][i];\n                }\n        }\n        if(dct8x8_allowed)\n            dct8x8_allowed = get_dct8x8_allowed(h);\n        for(list=0; list<h->list_count; list++){\n            for(i=0; i<4; i++){\n                h->ref_cache[list][ scan8[4*i]   ]=h->ref_cache[list][ scan8[4*i]+1 ];\n                if(IS_DIRECT(h->sub_mb_type[i])){\n                    fill_rectangle(h->mvd_cache[list][scan8[4*i]], 2, 2, 8, 0, 4);\n                    continue;\n                }\n                if(IS_DIR(h->sub_mb_type[i], 0, list) && !IS_DIRECT(h->sub_mb_type[i])){\n                    const int sub_mb_type= h->sub_mb_type[i];\n                    const int block_width= (sub_mb_type & (MB_TYPE_16x16|MB_TYPE_16x8)) ? 2 : 1;\n                    for(j=0; j<sub_partition_count[i]; j++){\n                        int mpx, mpy;\n                        int mx, my;\n                        const int index= 4*i + block_width*j;\n                        int16_t (* mv_cache)[2]= &h->mv_cache[list][ scan8[index] ];\n                        int16_t (* mvd_cache)[2]= &h->mvd_cache[list][ scan8[index] ];\n                        pred_motion(h, index, block_width, list, h->ref_cache[list][ scan8[index] ], &mpx, &mpy);\n                        mx = mpx + decode_cabac_mb_mvd( h, list, index, 0 );\n                        my = mpy + decode_cabac_mb_mvd( h, list, index, 1 );\n                        tprintf(s->avctx, "final mv:%d %d\\n", mx, my);\n                        if(IS_SUB_8X8(sub_mb_type)){\n                            mv_cache[ 1 ][0]=\n                            mv_cache[ 8 ][0]= mv_cache[ 9 ][0]= mx;\n                            mv_cache[ 1 ][1]=\n                            mv_cache[ 8 ][1]= mv_cache[ 9 ][1]= my;\n                            mvd_cache[ 1 ][0]=\n                            mvd_cache[ 8 ][0]= mvd_cache[ 9 ][0]= mx - mpx;\n                            mvd_cache[ 1 ][1]=\n                            mvd_cache[ 8 ][1]= mvd_cache[ 9 ][1]= my - mpy;\n                        }else if(IS_SUB_8X4(sub_mb_type)){\n                            mv_cache[ 1 ][0]= mx;\n                            mv_cache[ 1 ][1]= my;\n                            mvd_cache[ 1 ][0]= mx - mpx;\n                            mvd_cache[ 1 ][1]= my - mpy;\n                        }else if(IS_SUB_4X8(sub_mb_type)){\n                            mv_cache[ 8 ][0]= mx;\n                            mv_cache[ 8 ][1]= my;\n                            mvd_cache[ 8 ][0]= mx - mpx;\n                            mvd_cache[ 8 ][1]= my - mpy;\n                        }\n                        mv_cache[ 0 ][0]= mx;\n                        mv_cache[ 0 ][1]= my;\n                        mvd_cache[ 0 ][0]= mx - mpx;\n                        mvd_cache[ 0 ][1]= my - mpy;\n                    }\n                }else{\n                    uint32_t *p= (uint32_t *)&h->mv_cache[list][ scan8[4*i] ][0];\n                    uint32_t *pd= (uint32_t *)&h->mvd_cache[list][ scan8[4*i] ][0];\n                    p[0] = p[1] = p[8] = p[9] = 0;\n                    pd[0]= pd[1]= pd[8]= pd[9]= 0;\n                }\n            }\n        }\n    } else if( IS_DIRECT(mb_type) ) {\n        pred_direct_motion(h, &mb_type);\n        fill_rectangle(h->mvd_cache[0][scan8[0]], 4, 4, 8, 0, 4);\n        fill_rectangle(h->mvd_cache[1][scan8[0]], 4, 4, 8, 0, 4);\n        dct8x8_allowed &= h->sps.direct_8x8_inference_flag;\n    } else {\n        int list, mx, my, i, mpx, mpy;\n        if(IS_16X16(mb_type)){\n            for(list=0; list<h->list_count; list++){\n                if(IS_DIR(mb_type, 0, list)){\n                        const int ref = h->ref_count[list] > 1 ? decode_cabac_mb_ref( h, list, 0 ) : 0;\n                        fill_rectangle(&h->ref_cache[list][ scan8[0] ], 4, 4, 8, ref, 1);\n                }else\n                    fill_rectangle(&h->ref_cache[list][ scan8[0] ], 4, 4, 8, (uint8_t)LIST_NOT_USED, 1);\n            }\n            for(list=0; list<h->list_count; list++){\n                if(IS_DIR(mb_type, 0, list)){\n                    pred_motion(h, 0, 4, list, h->ref_cache[list][ scan8[0] ], &mpx, &mpy);\n                    mx = mpx + decode_cabac_mb_mvd( h, list, 0, 0 );\n                    my = mpy + decode_cabac_mb_mvd( h, list, 0, 1 );\n                    tprintf(s->avctx, "final mv:%d %d\\n", mx, my);\n                    fill_rectangle(h->mvd_cache[list][ scan8[0] ], 4, 4, 8, pack16to32(mx-mpx,my-mpy), 4);\n                    fill_rectangle(h->mv_cache[list][ scan8[0] ], 4, 4, 8, pack16to32(mx,my), 4);\n                }else\n                    fill_rectangle(h->mv_cache[list][ scan8[0] ], 4, 4, 8, 0, 4);\n            }\n        }\n        else if(IS_16X8(mb_type)){\n            for(list=0; list<h->list_count; list++){\n                    for(i=0; i<2; i++){\n                        if(IS_DIR(mb_type, i, list)){\n                            const int ref= h->ref_count[list] > 1 ? decode_cabac_mb_ref( h, list, 8*i ) : 0;\n                            fill_rectangle(&h->ref_cache[list][ scan8[0] + 16*i ], 4, 2, 8, ref, 1);\n                        }else\n                            fill_rectangle(&h->ref_cache[list][ scan8[0] + 16*i ], 4, 2, 8, (LIST_NOT_USED&0xFF), 1);\n                    }\n            }\n            for(list=0; list<h->list_count; list++){\n                for(i=0; i<2; i++){\n                    if(IS_DIR(mb_type, i, list)){\n                        pred_16x8_motion(h, 8*i, list, h->ref_cache[list][scan8[0] + 16*i], &mpx, &mpy);\n                        mx = mpx + decode_cabac_mb_mvd( h, list, 8*i, 0 );\n                        my = mpy + decode_cabac_mb_mvd( h, list, 8*i, 1 );\n                        tprintf(s->avctx, "final mv:%d %d\\n", mx, my);\n                        fill_rectangle(h->mvd_cache[list][ scan8[0] + 16*i ], 4, 2, 8, pack16to32(mx-mpx,my-mpy), 4);\n                        fill_rectangle(h->mv_cache[list][ scan8[0] + 16*i ], 4, 2, 8, pack16to32(mx,my), 4);\n                    }else{\n                        fill_rectangle(h->mvd_cache[list][ scan8[0] + 16*i ], 4, 2, 8, 0, 4);\n                        fill_rectangle(h-> mv_cache[list][ scan8[0] + 16*i ], 4, 2, 8, 0, 4);\n                    }\n                }\n            }\n        }else{\n            assert(IS_8X16(mb_type));\n            for(list=0; list<h->list_count; list++){\n                    for(i=0; i<2; i++){\n                        if(IS_DIR(mb_type, i, list)){\n                            const int ref= h->ref_count[list] > 1 ? decode_cabac_mb_ref( h, list, 4*i ) : 0;\n                            fill_rectangle(&h->ref_cache[list][ scan8[0] + 2*i ], 2, 4, 8, ref, 1);\n                        }else\n                            fill_rectangle(&h->ref_cache[list][ scan8[0] + 2*i ], 2, 4, 8, (LIST_NOT_USED&0xFF), 1);\n                    }\n            }\n            for(list=0; list<h->list_count; list++){\n                for(i=0; i<2; i++){\n                    if(IS_DIR(mb_type, i, list)){\n                        pred_8x16_motion(h, i*4, list, h->ref_cache[list][ scan8[0] + 2*i ], &mpx, &mpy);\n                        mx = mpx + decode_cabac_mb_mvd( h, list, 4*i, 0 );\n                        my = mpy + decode_cabac_mb_mvd( h, list, 4*i, 1 );\n                        tprintf(s->avctx, "final mv:%d %d\\n", mx, my);\n                        fill_rectangle(h->mvd_cache[list][ scan8[0] + 2*i ], 2, 4, 8, pack16to32(mx-mpx,my-mpy), 4);\n                        fill_rectangle(h->mv_cache[list][ scan8[0] + 2*i ], 2, 4, 8, pack16to32(mx,my), 4);\n                    }else{\n                        fill_rectangle(h->mvd_cache[list][ scan8[0] + 2*i ], 2, 4, 8, 0, 4);\n                        fill_rectangle(h-> mv_cache[list][ scan8[0] + 2*i ], 2, 4, 8, 0, 4);\n                    }\n                }\n            }\n        }\n    }\n   if( IS_INTER( mb_type ) ) {\n        h->chroma_pred_mode_table[mb_xy] = 0;\n        write_back_motion( h, mb_type );\n   }\n    if( !IS_INTRA16x16( mb_type ) ) {\n        cbp  = decode_cabac_mb_cbp_luma( h );\n        cbp |= decode_cabac_mb_cbp_chroma( h ) << 4;\n    }\n    h->cbp_table[mb_xy] = h->cbp = cbp;\n    if( dct8x8_allowed && (cbp&15) && !IS_INTRA( mb_type ) ) {\n        if( decode_cabac_mb_transform_size( h ) )\n            mb_type |= MB_TYPE_8x8DCT;\n    }\n    s->current_picture.mb_type[mb_xy]= mb_type;\n    if( cbp || IS_INTRA16x16( mb_type ) ) {\n        const uint8_t *scan, *scan8x8, *dc_scan;\n        const uint32_t *qmul;\n        int dqp;\n        if(IS_INTERLACED(mb_type)){\n            scan8x8= s->qscale ? h->field_scan8x8 : h->field_scan8x8_q0;\n            scan= s->qscale ? h->field_scan : h->field_scan_q0;\n            dc_scan= luma_dc_field_scan;\n        }else{\n            scan8x8= s->qscale ? h->zigzag_scan8x8 : h->zigzag_scan8x8_q0;\n            scan= s->qscale ? h->zigzag_scan : h->zigzag_scan_q0;\n            dc_scan= luma_dc_zigzag_scan;\n        }\n        h->last_qscale_diff = dqp = decode_cabac_mb_dqp( h );\n        if( dqp == INT_MIN ){\n            av_log(h->s.avctx, AV_LOG_ERROR, "cabac decode of qscale diff failed at %d %d\\n", s->mb_x, s->mb_y);\n            return -1;\n        }\n        s->qscale += dqp;\n        if(((unsigned)s->qscale) > 51){\n            if(s->qscale<0) s->qscale+= 52;\n            else            s->qscale-= 52;\n        }\n        h->chroma_qp[0] = get_chroma_qp(h, 0, s->qscale);\n        h->chroma_qp[1] = get_chroma_qp(h, 1, s->qscale);\n        if( IS_INTRA16x16( mb_type ) ) {\n            int i;\n            decode_cabac_residual( h, h->mb, 0, 0, dc_scan, NULL, 16);\n            if( cbp&15 ) {\n                qmul = h->dequant4_coeff[0][s->qscale];\n                for( i = 0; i < 16; i++ ) {\n                    decode_cabac_residual(h, h->mb + 16*i, 1, i, scan + 1, qmul, 15);\n                }\n            } else {\n                fill_rectangle(&h->non_zero_count_cache[scan8[0]], 4, 4, 8, 0, 1);\n            }\n        } else {\n            int i8x8, i4x4;\n            for( i8x8 = 0; i8x8 < 4; i8x8++ ) {\n                if( cbp & (1<<i8x8) ) {\n                    if( IS_8x8DCT(mb_type) ) {\n                        decode_cabac_residual(h, h->mb + 64*i8x8, 5, 4*i8x8,\n                            scan8x8, h->dequant8_coeff[IS_INTRA( mb_type ) ? 0:1][s->qscale], 64);\n                    } else {\n                        qmul = h->dequant4_coeff[IS_INTRA( mb_type ) ? 0:3][s->qscale];\n                        for( i4x4 = 0; i4x4 < 4; i4x4++ ) {\n                            const int index = 4*i8x8 + i4x4;\n                            decode_cabac_residual(h, h->mb + 16*index, 2, index, scan, qmul, 16);\n                        }\n                    }\n                } else {\n                    uint8_t * const nnz= &h->non_zero_count_cache[ scan8[4*i8x8] ];\n                    nnz[0] = nnz[1] = nnz[8] = nnz[9] = 0;\n                }\n            }\n        }\n        if( cbp&0x30 ){\n            int c;\n            for( c = 0; c < 2; c++ ) {\n                decode_cabac_residual(h, h->mb + 256 + 16*4*c, 3, c, chroma_dc_scan, NULL, 4);\n            }\n        }\n        if( cbp&0x20 ) {\n            int c, i;\n            for( c = 0; c < 2; c++ ) {\n                qmul = h->dequant4_coeff[c+1+(IS_INTRA( mb_type ) ? 0:3)][h->chroma_qp[c]];\n                for( i = 0; i < 4; i++ ) {\n                    const int index = 16 + 4 * c + i;\n                    decode_cabac_residual(h, h->mb + 16*index, 4, index - 16, scan + 1, qmul, 15);\n                }\n            }\n        } else {\n            uint8_t * const nnz= &h->non_zero_count_cache[0];\n            nnz[ scan8[16]+0 ] = nnz[ scan8[16]+1 ] =nnz[ scan8[16]+8 ] =nnz[ scan8[16]+9 ] =\n            nnz[ scan8[20]+0 ] = nnz[ scan8[20]+1 ] =nnz[ scan8[20]+8 ] =nnz[ scan8[20]+9 ] = 0;\n        }\n    } else {\n        uint8_t * const nnz= &h->non_zero_count_cache[0];\n        fill_rectangle(&nnz[scan8[0]], 4, 4, 8, 0, 1);\n        nnz[ scan8[16]+0 ] = nnz[ scan8[16]+1 ] =nnz[ scan8[16]+8 ] =nnz[ scan8[16]+9 ] =\n        nnz[ scan8[20]+0 ] = nnz[ scan8[20]+1 ] =nnz[ scan8[20]+8 ] =nnz[ scan8[20]+9 ] = 0;\n        h->last_qscale_diff = 0;\n    }\n    s->current_picture.qscale_table[mb_xy]= s->qscale;\n    write_back_non_zero_count(h);\n    if(MB_MBAFF){\n        h->ref_count[0] >>= 1;\n        h->ref_count[1] >>= 1;\n    }\n    return 0;\n}']