binary reader

utils/load_binary_data.jl

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+using Mmap
+
+
+function load_data_s8(f_path, nx, nz, nt_samp)
+    """
+    Data might be double precision, and byteswaped from the data transfer.
+    Check byteswap by seeing if there are any values that are very large
+        (e.g. 1e30) (TODO automate this...)
+    """
+    #f_path in path to binary file
+    #nx number of grid points in x direction
+    #nz number of grid points in z
+    #nt_samp number of samples in time
+
+    f = open(f_path, "r");
+    F = bswap.(Mmap.mmap(f, Vector{Float64}, nt_samp * nz * nx))
+    F = reshape(F, (nz, nx, nt_samp)); #F[:,:,t]'
+    close(f)
+    println("Field data loaded: size(F) = ", size(F))
+    return F
+end
+
+function obtain_snapshot_matrix(f_path, nx, nz, nt_samp, t_skip)
+    #t_skip used for: Δt_data = t_skip * Δt_sample
+    F_full = load_data_s8(f_path, nx, nz, nt_samp)[:,:,1:t_skip:end];
+    x0 = 0.15; xf = 0.55; nx = size(F_full)[2]; nz = size(F_full)[1];
+    nt_samp = size(F_full)[3];
+    X = reshape(F_full, (nx * nz, nt_samp))
+    return X
+end
+
+
+# function read_binary_file(f_path, nx, nz, nt_samp)
+#     #f_path in path to binary file
+#     #nx number of grid points in x direction
+#     #nz number of grid points in z
+#     #nt_samp number of samples in time
+#     file = open(f_path, "r");
+
+#     println("reading binary data and performaing bit swap")
+#     p = bswap.(Mmap.mmap(file, Vector{Float64}, nx * nz * nt_samp))
+#     p = reshape(p, (nx, nz, nt_samp)); #F[:,:,t]
+#     # println("mirror and stack to obtain full pressure field")
+#     # p = permutedims(hcat(p, reverse(p, dims=2)), (2,1,3));
+#     return p
+# end