vrshoot
view libs/vorbis/smallft.h @ 0:b2f14e535253
initial commit
| author | John Tsiombikas <nuclear@member.fsf.org> |
|---|---|
| date | Sat, 01 Feb 2014 19:58:19 +0200 |
| parents | |
| children |
line source
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 1994-2007 *
9 * by the Xiph.Org Foundation http://www.xiph.org/ *
10 * *
11 ********************************************************************
13 function: fft transform
14 last mod: $Id: smallft.h 13293 2007-07-24 00:09:47Z xiphmont $
16 ********************************************************************/
18 #ifndef _V_SMFT_H_
19 #define _V_SMFT_H_
21 #include "vorbis/codec.h"
23 typedef struct {
24 int n;
25 float *trigcache;
26 int *splitcache;
27 } drft_lookup;
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);
34 #endif