static inline void decode_subband_slice_buffered(SnowContext *s, SubBand *b, slice_buffer * sb, int start_y, int h, int save_state[1]){

    const int w= b->width;

    int y;

    const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);

    int qmul= ff_qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);

    int qadd= (s->qbias*qmul)>>QBIAS_SHIFT;

    int new_index = 0;



    if(b->ibuf == s->spatial_idwt_buffer || s->qlog == LOSSLESS_QLOG){

        qadd= 0;

        qmul= 1<<QEXPSHIFT;

    }



    

    if (start_y != 0)

        new_index = save_state[0];





    for(y=start_y; y<h; y++){

        int x = 0;

        int v;

        IDWTELEM * line = slice_buffer_get_line(sb, y * b->stride_line + b->buf_y_offset) + b->buf_x_offset;

        memset(line, 0, b->width*sizeof(IDWTELEM));

        v = b->x_coeff[new_index].coeff;

        x = b->x_coeff[new_index++].x;

        while(x < w){

            register int t= ( (v>>1)*qmul + qadd)>>QEXPSHIFT;

            register int u= -(v&1);

            line[x] = (t^u) - u;



            v = b->x_coeff[new_index].coeff;

            x = b->x_coeff[new_index++].x;

        }

    }



    

    save_state[0] = new_index;



    return;

}
