diff options
Diffstat (limited to 'kiss_fftr.h')
-rw-r--r-- | kiss_fftr.h | 25 |
1 files changed, 13 insertions, 12 deletions
diff --git a/kiss_fftr.h b/kiss_fftr.h index 72e5a57..4ab52db 100644 --- a/kiss_fftr.h +++ b/kiss_fftr.h | |||
@@ -6,33 +6,34 @@ | |||
6 | extern "C" { | 6 | extern "C" { |
7 | #endif | 7 | #endif |
8 | 8 | ||
9 | 9 | /* | |
10 | /* | 10 | |
11 | 11 | Real optimized version can save about 45% cpu time vs. complex fft of a real | |
12 | Real optimized version can save about 45% cpu time vs. complex fft of a real seq. | 12 | seq. |
13 | |||
14 | |||
13 | 15 | ||
14 | |||
15 | |||
16 | */ | 16 | */ |
17 | 17 | ||
18 | typedef struct kiss_fftr_state *kiss_fftr_cfg; | 18 | typedef struct kiss_fftr_state *kiss_fftr_cfg; |
19 | 19 | ||
20 | 20 | kiss_fftr_cfg kiss_fftr_alloc(int nfft, int inverse_fft, void *mem, | |
21 | kiss_fftr_cfg kiss_fftr_alloc(int nfft,int inverse_fft,void * mem, size_t * lenmem); | 21 | size_t *lenmem); |
22 | /* | 22 | /* |
23 | nfft must be even | 23 | nfft must be even |
24 | 24 | ||
25 | If you don't care to allocate space, use mem = lenmem = NULL | 25 | If you don't care to allocate space, use mem = lenmem = NULL |
26 | */ | 26 | */ |
27 | 27 | ||
28 | 28 | void kiss_fftr(kiss_fftr_cfg cfg, const kiss_fft_scalar *timedata, | |
29 | void kiss_fftr(kiss_fftr_cfg cfg,const kiss_fft_scalar *timedata,kiss_fft_cpx *freqdata); | 29 | kiss_fft_cpx *freqdata); |
30 | /* | 30 | /* |
31 | input timedata has nfft scalar points | 31 | input timedata has nfft scalar points |
32 | output freqdata has nfft/2+1 complex points | 32 | output freqdata has nfft/2+1 complex points |
33 | */ | 33 | */ |
34 | 34 | ||
35 | void kiss_fftri(kiss_fftr_cfg cfg,const kiss_fft_cpx *freqdata,kiss_fft_scalar *timedata); | 35 | void kiss_fftri(kiss_fftr_cfg cfg, const kiss_fft_cpx *freqdata, |
36 | kiss_fft_scalar *timedata); | ||
36 | /* | 37 | /* |
37 | input freqdata has nfft/2+1 complex points | 38 | input freqdata has nfft/2+1 complex points |
38 | output timedata has nfft scalar points | 39 | output timedata has nfft scalar points |