323 void cdft(int n, int isgn, double *a, int *ip, double *w)  in cdft()
345 void rdft(int n, int isgn, double *a, int *ip, double *w)  in rdft()
388 void ddct(int n, int isgn, double *a, int *ip, double *w)  in ddct()
442 void ddst(int n, int isgn, double *a, int *ip, double *w)  in ddst()
496 void dfct(int n, double *a, double *t, int *ip, double *w)  in dfct()
589 void dfst(int n, double *a, double *t, int *ip, double *w)  in dfst()
727 static void bitrv2(int n, int *ip0, double *a)  in bitrv2()
828 static void bitrv2conj(int n, int *ip0, double *a)  in bitrv2conj()
938 static void cftfsub(int n, double *a, double const *w)  in cftfsub()
988 static void cftbsub(int n, double *a, double const *w)  in cftbsub()
1038 static void cft1st(int n, double *a, double const *w)  in cft1st()
1143 static void cftmdl(int n, int l, double *a, double const *w)  in cftmdl()
1270 static void rftfsub(int n, double *a, int nc, double const *c)  in rftfsub()
1295 static void rftbsub(int n, double *a, int nc, double const *c)  in rftbsub()
1322 static void dctsub(int n, double *a, int nc, double const *c)  in dctsub()
1343 static void dstsub(int n, double *a, int nc, double const *c)  in dstsub()