blob: d6d584ab7d2cf10e1704ac9175aadb7490bc718e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS SOURCE IS GOVERNED BY *
* THE GNU LESSER/LIBRARY PUBLIC LICENSE, WHICH IS INCLUDED WITH *
* THIS SOURCE. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2000 *
* by Monty <monty@xiph.org> and the XIPHOPHORUS Company *
* http://www.xiph.org/ *
* *
********************************************************************
function: modified discrete cosine transform prototypes
last mod: $Id: mdct.h,v 1.13 2000/11/06 00:07:01 xiphmont Exp $
********************************************************************/
#ifndef _OGG_mdct_H_
#define _OGG_mdct_H_
#include "vorbis/codec.h"
typedef struct {
int n;
int log2n;
float *trig;
int *bitrev;
} mdct_lookup;
extern void mdct_init(mdct_lookup *lookup,int n);
extern void mdct_clear(mdct_lookup *l);
extern void mdct_forward(mdct_lookup *init, float *in, float *out);
extern void mdct_backward(mdct_lookup *init, float *in, float *out);
#endif
|
