% idwtmult1.m%% Inverts dwtmult1.%% Written by : Justin Romberg% Created : 5/1/2001function x = idwtmult1(w, g0, g1, L)N = length(w);m0 = length(g0);m1 = length(g1);% delay to line up tree structurez = floor((m1-m0)/4)+1;for ll = L:-1:1  w(1:N*2^(-ll)) = cshift(w(1:N*2^(-ll)),z,'r');  w(1:N*2^(-ll+1)) = idwtlevel1(w(1:N*2^(-ll+1)), g0, g1);endx = w;