default CFLAGS

test/Makefile

@@ -46,9 +46,9 @@ tools:
 	cd ../tools && make all
 
 # for x86 pentium+ machines , these flags work well
-CFLAGS=-Wall -O3 -pedantic -march=pentiumpro -ffast-math -fomit-frame-pointer   -I.. -I../tools $(WARNINGS)
+#CFLAGS=-Wall -O3 -pedantic -march=pentiumpro -ffast-math -fomit-frame-pointer   -I.. -I../tools $(WARNINGS)
 # If the above flags do not work, try the following
-#CFLAGS=-Wall -O3 -I.. -I../tools $(WARNINGS)
+CFLAGS=-Wall -O3 -I.. -I../tools $(WARNINGS)
 
 $(SELFTEST): $(SELFTESTSRC) $(SRCFILES)
 	$(CC) -o $@ $(CFLAGS) $(TYPEFLAGS) -lm $+

tools/Makefile

@@ -27,9 +27,9 @@ endif
 
 all: $(FFTUTIL) $(FASTFILT) $(FASTFILTREAL) $(PSDPNG)
 
-CFLAGS=-Wall -O3 -pedantic -march=pentiumpro -ffast-math -fomit-frame-pointer $(WARNINGS)
+#CFLAGS=-Wall -O3 -pedantic -march=pentiumpro -ffast-math -fomit-frame-pointer $(WARNINGS)
 # If the above flags do not work, try the following
-#CFLAGS=-Wall -O3
+CFLAGS=-Wall -O3 $(WARNINGS)
 
 $(FASTFILTREAL): ../kiss_fft.c kiss_fastfir.c kiss_fftr.c
 	$(CC) -o $@ $(CFLAGS) -I.. $(TYPEFLAGS) -DREAL_FASTFIR -lm $+ -DFAST_FILT_UTIL

tools/kiss_fftr.h

@@ -7,14 +7,36 @@ extern "C" {
 #endif
 
     
-/* Real optimized version can save about 45% cpu time vs. complex fft of a real seq.
+/* 
+ 
+ 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