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16 defines kiss_fft_f64_scalar as either short or a float type |
16 defines kiss_fft_f64_scalar as either short or a float type |
17 and defines |
17 and defines |
18 typedef struct { kiss_fft_f64_scalar r; kiss_fft_f64_scalar i; }kiss_fft_f64_cpx; */ |
18 typedef struct { kiss_fft_f64_scalar r; kiss_fft_f64_scalar i; }kiss_fft_f64_cpx; */ |
19 #include "kiss_fft_f64.h" |
19 #include "kiss_fft_f64.h" |
20 #include <limits.h> |
20 #include <limits.h> |
21 |
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22 /* The 2*sizeof(size_t) alignment here is borrowed from |
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23 * GNU libc, so it should be good most everywhere. |
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24 * It is more conservative than is needed on some 64-bit |
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25 * platforms, but ia64 does require a 16-byte alignment. |
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26 * The SIMD extensions for x86 and ppc32 would want a |
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27 * larger alignment than this, but we don't need to |
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28 * do better than malloc. |
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29 * |
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30 * Borrowed from GLib's gobject/gtype.c |
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31 */ |
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32 #define STRUCT_ALIGNMENT (2 * sizeof (size_t)) |
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33 #define ALIGN_STRUCT(offset) \ |
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34 ((offset + (STRUCT_ALIGNMENT - 1)) & -STRUCT_ALIGNMENT) |
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35 |
21 |
36 #define MAXFACTORS 32 |
22 #define MAXFACTORS 32 |
37 /* e.g. an fft of length 128 has 4 factors |
23 /* e.g. an fft of length 128 has 4 factors |
38 as far as kissfft is concerned |
24 as far as kissfft is concerned |
39 4*4*4*2 |
25 4*4*4*2 |