1 files changed, 47 insertions, 0 deletions
diff --git a/src/kiss_fftr.h b/src/kiss_fftr.h
new file mode 100644
index 0000000..4ab52db
--- /dev/null
+++ b/src/kiss_fftr.h
@@ -0,0 +1,47 @@
+#ifndef KISS_FTR_H
+#define KISS_FTR_H
+
+#include "kiss_fft.h"
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+
+ Real optimized version can save about 45% cpu time vs. complex fft of a real
+ seq.
+
+
+
+ */
+
+typedef struct kiss_fftr_state *kiss_fftr_cfg;
+
+kiss_fftr_cfg kiss_fftr_alloc(int nfft, int inverse_fft, void *mem,
+                              size_t *lenmem);
+/*
+ nfft must be even
+
+ If you don't care to allocate space, use mem = lenmem = NULL
+*/
+
+void kiss_fftr(kiss_fftr_cfg cfg, const kiss_fft_scalar *timedata,
+               kiss_fft_cpx *freqdata);
+/*
+ input timedata has nfft scalar points
+ output freqdata has nfft/2+1 complex points
+*/
+
+void kiss_fftri(kiss_fftr_cfg cfg, const kiss_fft_cpx *freqdata,
+                kiss_fft_scalar *timedata);
+/*
+ input freqdata has  nfft/2+1 complex points
+ output timedata has nfft scalar points
+*/
+
+#define kiss_fftr_free free
+
+#ifdef __cplusplus
+}
+#endif
+#endif