Add a shift function

1 files changed, 4 insertions, 0 deletions

diff --git a/fft.h b/fft.h
index 8a4e20e..35a756d 100644
--- a/fft.h
+++ b/fft.h
@@ -67,3 +67,7 @@ fft (complex_t *buffer, int n);
 
 void
 ifft (complex_t *buffer, int n);
+
+/* Shifts the zero component to the center of the array */
+void
+shift (complex_t *buffer, int n);