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author | erdgeist@erdgeist.org <erdgeist@bauklotz.fritz.box> | 2019-07-04 23:26:09 +0200 |
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committer | erdgeist@erdgeist.org <erdgeist@bauklotz.fritz.box> | 2019-07-04 23:26:09 +0200 |
commit | f02dfce6e6c34b3d8a7b8a0e784b506178e331fa (patch) | |
tree | 45556e6104242d4702689760433d7321ae74ec17 /kiss_fftr.h |
stripdown of version 0.9
Diffstat (limited to 'kiss_fftr.h')
-rw-r--r-- | kiss_fftr.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/kiss_fftr.h b/kiss_fftr.h new file mode 100644 index 0000000..72e5a57 --- /dev/null +++ b/kiss_fftr.h | |||
@@ -0,0 +1,46 @@ | |||
1 | #ifndef KISS_FTR_H | ||
2 | #define KISS_FTR_H | ||
3 | |||
4 | #include "kiss_fft.h" | ||
5 | #ifdef __cplusplus | ||
6 | extern "C" { | ||
7 | #endif | ||
8 | |||
9 | |||
10 | /* | ||
11 | |||
12 | Real optimized version can save about 45% cpu time vs. complex fft of a real seq. | ||
13 | |||
14 | |||
15 | |||
16 | */ | ||
17 | |||
18 | typedef struct kiss_fftr_state *kiss_fftr_cfg; | ||
19 | |||
20 | |||
21 | kiss_fftr_cfg kiss_fftr_alloc(int nfft,int inverse_fft,void * mem, size_t * lenmem); | ||
22 | /* | ||
23 | nfft must be even | ||
24 | |||
25 | If you don't care to allocate space, use mem = lenmem = NULL | ||
26 | */ | ||
27 | |||
28 | |||
29 | void kiss_fftr(kiss_fftr_cfg cfg,const kiss_fft_scalar *timedata,kiss_fft_cpx *freqdata); | ||
30 | /* | ||
31 | input timedata has nfft scalar points | ||
32 | output freqdata has nfft/2+1 complex points | ||
33 | */ | ||
34 | |||
35 | void kiss_fftri(kiss_fftr_cfg cfg,const kiss_fft_cpx *freqdata,kiss_fft_scalar *timedata); | ||
36 | /* | ||
37 | input freqdata has nfft/2+1 complex points | ||
38 | output timedata has nfft scalar points | ||
39 | */ | ||
40 | |||
41 | #define kiss_fftr_free free | ||
42 | |||
43 | #ifdef __cplusplus | ||
44 | } | ||
45 | #endif | ||
46 | #endif | ||