MIDI Pipeline Reference Manual
2.8.3
Main Page
Modules
Files
File List
midi
fft.h
1
/**********************************************************
2
***********************************************************
3
* European Southern Observatory
4
* VLTI MIDI Data Reduction Software
5
*
6
* Module name: fft.h
7
* Description:
8
*
9
*
10
* History:
11
* 03-Feb-03 (jmeisner) Created
12
* 03-Mar-03 (csabet) Added title, directives and included in the MIDI pipeline
13
***********************************************************
14
**********************************************************/
15
#ifndef _FFT_H
16
#define _FFT_H
17
18
/**********************************************************
19
* Include files
20
**********************************************************/
21
22
/**********************************************************
23
* Constant definitions
24
**********************************************************/
25
#define MAXFFTSIZE (4096) // Possible values are power of 2
26
27
/**********************************************************
28
* Global Variables
29
**********************************************************/
30
extern
struct
Complex *FFTarray;
// New, array in which FFT is processed, and results delivered:
31
extern
int
FFTsize;
32
extern
int
FFThalfsize;
33
extern
int
FFTlevel;
34
extern
int
shuffle[];
35
extern
float
ScaleFFTby;
36
37
/**********************************************************
38
* Type definitions
39
**********************************************************/
40
41
/**********************************************************
42
* Function Prototypes
43
**********************************************************/
44
void
FFT(
struct
Complex *Input,
int
level);
45
void
IFT(
struct
Complex *Input,
int
level);
46
void
FFTofReal(
float
*Input,
int
InputSize);
47
void
FFTfullReal(
float
*Input,
int
InputSize,
float
scale);
48
49
// Also might be used externally (usually not!):
50
51
void
FFTInit(
int
level);
// , int inverse);
52
void
SetFFTsize(
int
InputSize);
53
void
DoFFT(
void
);
54
void
DoIFT(
void
);
55
void
Type2DoIFT(
void
);
56
int
determineFFTsize(
57
int
framesPerScan);
58
59
/* void ButterflyXfwd (int AIndex, int BIndex, int TwiddleIndex, */
60
/* struct Complex arr1[]); */
61
/* void ButterflyXinv (int AIndex, int BIndex, int TwiddleIndex, */
62
/* struct Complex arr1[]); */
63
/* void Type2ButterflyXinv (int AIndex, int BIndex, int TwiddleIndex, */
64
/* struct Complex arr1[]); */
65
/* void Type2IFT(struct Complex *Output, int newlevel); */
66
/* void Type2IFTtoReal(float *Output, int newlevel); */
67
/* void FFTofShortArray(struct Complex *Input, int InputSize); */
68
69
/*********************************************************/
70
#endif
71
/*********************************************************/
Generated by
1.8.1.1