smallft.h - vx32 - Local 9vx git repository for patches.
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smallft.h (1279B)
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1 /********************************************************************
2 * *
3 * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
4 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
5 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
6 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
7 * *
8 * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
9 * by the XIPHOPHORUS Company http://www.xiph.org/ *
10 * *
11 ********************************************************************
12
13 function: fft transform
14 last mod: $Id: smallft.h 1919 2005-07-24 14:18:04Z baford $
15
16 ********************************************************************/
17
18 #ifndef _V_SMFT_H_
19 #define _V_SMFT_H_
20
21 #include "vorbis/codec.h"
22
23 typedef struct {
24 int n;
25 float *trigcache;
26 int *splitcache;
27 } drft_lookup;
28
29 extern void drft_forward(drft_lookup *l,float *data);
30 extern void drft_backward(drft_lookup *l,float *data);
31 extern void drft_init(drft_lookup *l,int n);
32 extern void drft_clear(drft_lookup *l);
33
34 #endif