Commit [f971a5]  Maximize  Restore  History

DCT routines rewritten to C. Speedup differs for each dct version and it is more prominent for the single precision data.

Tested for array of length 1048576
dcti - no speedup,
dctii - 3x speedup for single, 2x for double
dctiii - 4x speedup for single, 2x for double
dctiv - 6x speedup for single and double

prusa prusa 2013-06-14

added comp/comp_dct.m
changed fourier/dcti.m
changed fourier/dctii.m
changed fourier/dctiii.m
changed fourier/dctiv.m
added mex/comp_dct.c
changed mex/filedefs.mk
changed testing/test_all_ltfat.m
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fourier/dcti.m Diff Switch to side-by-side view
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fourier/dctii.m Diff Switch to side-by-side view
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fourier/dctiii.m Diff Switch to side-by-side view
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fourier/dctiv.m Diff Switch to side-by-side view
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mex/comp_dct.c Diff Switch to side-by-side view
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mex/filedefs.mk Diff Switch to side-by-side view
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testing/test_all_ltfat.m Diff Switch to side-by-side view
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