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Experiment: trying to implement a generic fast DCT II/III based on "Fast and numerically stable algorithms for discrete cosine transforms" from Gerlind Plonka & Manfred Tasche (DOI: 10.1016/j.laa.2004.07.015). • plonka.py contains the litteral implementation of the algorithms (recursive form) presented in the paper. • gen_c.py generates the unrolled C code to compute forward and inverse 2D DCTs (DCT-II and DCT-III, scaled, floating point) for several dimensions (4x4, 8x8, 16x16, ...) using the maths in plonka.py. The 1D DCTs can be extracted from that code as well. Running ``make'' will test the mathematics in plonka.py (test-plonka-*), generates the C (including tests) for a few DCT (in dct*.c), compile them, and run them as a test.
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Fast Forward/Inverse DCT C code generation in Python (following Plonka & Tasche)
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