if( mbn_xy >= 0 && h->last_qscale_diff != 0 && ( IS_INTRA16x16(s->current_picture.mb_type[mbn_xy] ) || (h->cbp_table[mbn_xy]&0x3f) ) )
if( h->last_qscale_diff != 0 && ( IS_INTRA16x16(s->current_picture.mb_type[mbn_xy] ) || (h->cbp_table[mbn_xy]&0x3f) ) )
static int decode_cabac_mb_dqp( H264Context *h) {    MpegEncContext * const s = &h->s;    int mbn_xy;    int   ctx = 0;    int   val = 0;    if( s->mb_x > 0 )        mbn_xy = s->mb_x + s->mb_y*s->mb_stride - 1;    else        mbn_xy = s->mb_width - 1 + (s->mb_y-1)*s->mb_stride;    if( mbn_xy >= 0 && h->last_qscale_diff != 0 && ( IS_INTRA16x16(s->current_picture.mb_type[mbn_xy] ) || (h->cbp_table[mbn_xy]&0x3f) ) )        ctx++;    while( get_cabac( &h->cabac, &h->cabac_state[60 + ctx] ) ) {        if( ctx < 2 )            ctx = 2;        else            ctx = 3;        val++;    }    if( val&0x01 )        return (val + 1)/2;    else        return -(val + 1)/2;}