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 |
