-/******************************************************************
- * CopyPolicy: GNU Public License 2 applies
- * Copyright (C) 1998-1999 Monty xiphmont@mit.edu, monty@xiph.org
- *
- * Stripped down FFT implementation from OggSquish.
- *
- ******************************************************************/
+/********************************************************************
+ * *
+ * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
+ * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
+ * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
+ * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
+ * *
+ * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007 *
+ * by the Xiph.Org Foundation http://www.xiph.org/ *
+ * *
+ ********************************************************************
+
+ function: fft transform
+ last mod: $Id$
+
+ ********************************************************************/
#ifndef _V_SMFT_H_
#define _V_SMFT_H_
-#include "codec.h"
+#include "vorbis/codec.h"
+
+typedef struct {
+ int n;
+ float *trigcache;
+ int *splitcache;
+} drft_lookup;
-extern void drft_forward(drft_lookup *l,double *data);
-extern void drft_backward(drft_lookup *l,double *data);
+extern void drft_forward(drft_lookup *l,float *data);
+extern void drft_backward(drft_lookup *l,float *data);
extern void drft_init(drft_lookup *l,int n);
extern void drft_clear(drft_lookup *l);