47 lines
1.2 KiB
C
47 lines
1.2 KiB
C
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#ifndef KFC_H
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#define KFC_H
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#include "kiss_fft.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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KFC -- Kiss FFT Cache
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Not needing to deal with kiss_fft_alloc and a config
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object may be handy for a lot of programs.
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KFC uses the underlying KISS FFT functions, but caches the config object.
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The first time kfc_fft or kfc_ifft for a given FFT size, the cfg
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object is created for it. All subsequent calls use the cached
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configuration object.
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NOTE:
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You should probably not use this if your program will be using a lot
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of various sizes of FFTs. There is a linear search through the
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cached objects. If you are only using one or two FFT sizes, this
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will be negligible. Otherwise, you may want to use another method
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of managing the cfg objects.
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There is no automated cleanup of the cached objects. This could lead
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to large memory usage in a program that uses a lot of *DIFFERENT*
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sized FFTs. If you want to force all cached cfg objects to be freed,
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call kfc_cleanup.
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*/
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/*forward complex FFT */
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void kfc_fft(int nfft, const kiss_fft_cpx * fin,kiss_fft_cpx * fout);
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/*reverse complex FFT */
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void kfc_ifft(int nfft, const kiss_fft_cpx * fin,kiss_fft_cpx * fout);
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/*free all cached objects*/
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void kfc_cleanup(void);
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#ifdef __cplusplus
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}
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#endif
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#endif
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