function: normalized modified discrete cosine transform
power of two length transform only [64 <= n ]
- last mod: $Id: mdct.c,v 1.20 2000/12/16 01:49:39 xiphmont Exp $
+ last mod: $Id: mdct.c,v 1.21 2000/12/17 00:34:05 xiphmont Exp $
Original algorithm adapted long ago from _The use of multirate filter
banks for coding of high quality digital audio_, by T. Sporer,
#include <math.h>
#include "vorbis/codec.h"
#include "mdct.h"
+#include "os.h"
/* build lookups for trig functions; also pre-figure scaling and
some window function algebra. */