How to calculate the wavelet coefficients of DWT when using sliding window?

Hi ,i used a c code for DWt(Db4 )to get the wavelet coefficients but my input signal is to large [2560] and i implement this code in FPGA (XILINX ZC702) which was stuck in the middle of the code. So to reduce the volume of data i used a sliding window of length =w and then i calculate the wavelet coefficient of each sliding window . But i don't know how to get the result of this all this coefficients of all the sliding window so of all the signal ? is it a sommation of all this coefficients or what ?