| 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 https://xiph.org/ *
|
|---|
| 10 | * *
|
|---|
| 11 | ********************************************************************
|
|---|
| 12 |
|
|---|
| 13 | function: fft transform
|
|---|
| 14 |
|
|---|
| 15 | ********************************************************************/
|
|---|
| 16 |
|
|---|
| 17 | #ifndef _V_SMFT_H_
|
|---|
| 18 | #define _V_SMFT_H_
|
|---|
| 19 |
|
|---|
| 20 | #include "vorbis/codec.h"
|
|---|
| 21 |
|
|---|
| 22 | typedef struct {
|
|---|
| 23 | int n;
|
|---|
| 24 | float *trigcache;
|
|---|
| 25 | int *splitcache;
|
|---|
| 26 | } drft_lookup;
|
|---|
| 27 |
|
|---|
| 28 | extern void drft_forward(drft_lookup *l,float *data);
|
|---|
| 29 | extern void drft_backward(drft_lookup *l,float *data);
|
|---|
| 30 | extern void drft_init(drft_lookup *l,int n);
|
|---|
| 31 | extern void drft_clear(drft_lookup *l);
|
|---|
| 32 |
|
|---|
| 33 | #endif
|
|---|
