Cffi Export Python Code To Dll , How To Read Image Object In @ffi.def_extern()

i am trying to convert my python code to dll using cffi so i can access this code in my c# apllication, and i am trying to send image my c# code to python function, below is my cod

Solution 1:

ffi.buffer(p) must return a buffer of some size. If p was of an known-length array type like char[100] then it would return a buffer of 100 bytes. If it was pointing to a struct, i.e. of type mystruct_t *, then it would be of size sizeof(mystruct_t). But here it is a unsigned char *, so the returned buffer contains only sizeof(unsigned char) bytes, i.e. a single byte.

Use instead the ffi.buffer(p, size) variant. To know the size, pass the length variable as an extra argument from C# to Python.