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2011 May 29
0
Use of cruel and unusal frame sizes
...; 512, a lot of which are odd numbers. However
some are even numbered, so this should work. Unfortunately it doesn't
and en exception is raised. Some investigation reveals the problem to
be in the module kiss_fft.c, during allocation of storage for the FFT.
The factorisation function kf_factor returns a failure if the frame size
has a prime factor > 5. This results in the block which wasn't yet
allocated being freed, and hence the exception. Given this restriction,
their is no frame size that the both the driver and CELT will accept.
I'd like to avoid the fancy footwor...