_kiss_fft_guts.h File Reference

KISS FFT internals, taken from: https://github.com/mborgerding/kissfft. More...

#include "kiss_fft.h"
#include <limits.h>

Go to the source code of this file.

Data Structures
struct	kiss_fft_cfg
	Internal KissFFT structure. More...

Macros
#define	MAXFACTORS   32
#define	S_MUL(a, b)
#define	C_MUL(m, a, b)
#define	C_FIXDIV(c, div)
#define	C_MULBYSCALAR(c, s)
#define	CHECK_OVERFLOW_OP(a, op, b)
#define	C_ADD(res, a, b)
#define	C_SUB(res, a, b)
#define	C_ADDTO(res, a)
#define	C_SUBFROM(res, a)
#define	KISS_FFT_COS(phase)
#define	KISS_FFT_SIN(phase)
#define	HALF_OF(x)
#define	kf_cexp(x, phase)
#define	pcpx(c)
#define	KISS_FFT_TMP_ALLOC(nbytes)
#define	KISS_FFT_TMP_FREE(ptr)

Detailed Description

KISS FFT internals, taken from: https://github.com/mborgerding/kissfft.

Author

Mark Borgerding

License

BSD 3-Clause

Definition in file _kiss_fft_guts.h.

Macro Definition Documentation

C_ADD

#define C_ADD	(		res,
			a,
			b )

Value:

    do { \
        CHECK_OVERFLOW_OP((a).r,+,(b).r)\
        CHECK_OVERFLOW_OP((a).i,+,(b).i)\
        (res).r=(a).r+(b).r;  (res).i=(a).i+(b).i; \
    }while(0)

Definition at line 103 of file _kiss_fft_guts.h.

C_ADDTO

#define C_ADDTO	(		res,
			a )

Value:

    do { \
        CHECK_OVERFLOW_OP((res).r,+,(a).r)\
        CHECK_OVERFLOW_OP((res).i,+,(a).i)\
        (res).r += (a).r;  (res).i += (a).i;\
    }while(0)

Definition at line 115 of file _kiss_fft_guts.h.

C_FIXDIV

#define C_FIXDIV	(		c,
			div )

Value:

/* NOOP */

Definition at line 93 of file _kiss_fft_guts.h.

C_MUL

#define C_MUL	(		m,
			a,
			b )

Value:

    do{ (m).r = (a).r*(b).r - (a).i*(b).i;\
        (m).i = (a).r*(b).i + (a).i*(b).r; }while(0)

Definition at line 90 of file _kiss_fft_guts.h.

C_MULBYSCALAR

#define C_MULBYSCALAR	(		c,
			s )

Value:

    do{ (c).r *= (s);\
        (c).i *= (s); }while(0)

Definition at line 94 of file _kiss_fft_guts.h.

C_SUB

#define C_SUB	(		res,
			a,
			b )

Value:

    do { \
        CHECK_OVERFLOW_OP((a).r,-,(b).r)\
        CHECK_OVERFLOW_OP((a).i,-,(b).i)\
        (res).r=(a).r-(b).r;  (res).i=(a).i-(b).i; \
    }while(0)

Definition at line 109 of file _kiss_fft_guts.h.

C_SUBFROM

#define C_SUBFROM	(		res,
			a )

Value:

    do {\
        CHECK_OVERFLOW_OP((res).r,-,(a).r)\
        CHECK_OVERFLOW_OP((res).i,-,(a).i)\
        (res).r -= (a).r;  (res).i -= (a).i; \
    }while(0)

Definition at line 122 of file _kiss_fft_guts.h.

CHECK_OVERFLOW_OP

#define CHECK_OVERFLOW_OP	(		a,
			op,
			b )

Value:

/* noop */

Definition at line 100 of file _kiss_fft_guts.h.

HALF_OF

#define HALF_OF

(

x

)

Value:

((x)*.5f)

Definition at line 141 of file _kiss_fft_guts.h.

kf_cexp

#define kf_cexp	(		x,
			phase )

Value:

    do{ \
        (x)->r = KISS_FFT_COS(phase);\
        (x)->i = KISS_FFT_SIN(phase);\
    }while(0)

Definition at line 144 of file _kiss_fft_guts.h.

KISS_FFT_COS

#define KISS_FFT_COS

(

phase

)

Value:

(kiss_fft_scalar) cos(phase)

Definition at line 139 of file _kiss_fft_guts.h.

KISS_FFT_SIN

#define KISS_FFT_SIN

(

phase

)

Value:

(kiss_fft_scalar) sin(phase)

Definition at line 140 of file _kiss_fft_guts.h.

KISS_FFT_TMP_ALLOC

#define KISS_FFT_TMP_ALLOC

(

nbytes

)

Value:

KISS_FFT_MALLOC(nbytes)

Definition at line 165 of file _kiss_fft_guts.h.

KISS_FFT_TMP_FREE

#define KISS_FFT_TMP_FREE

(

ptr

)

Value:

KISS_FFT_FREE(ptr)

Definition at line 166 of file _kiss_fft_guts.h.

MAXFACTORS

#define MAXFACTORS   32

Definition at line 23 of file _kiss_fft_guts.h.

pcpx

#define pcpx

(

c

)

Value:

    fprintf(stderr,"%g + %gi\n",(double)((c)->r),(double)((c)->i) )

Definition at line 152 of file _kiss_fft_guts.h.

S_MUL

#define S_MUL	(		a,
			b )

Value:

( (a)*(b) )

Definition at line 89 of file _kiss_fft_guts.h.