fft.c File Reference

Include dependency graph for fft.c:

Defines
#define	IBSS_ATTR
#define	ICONST_ATTR
#define	ICODE_ATTR
#define	BF(pre, pim, qre, qim, pre1, pim1, qre1, qim1)
Functions
int	fft_calc_unscaled (FFTContext *s, FFTComplex *z)
int	fft_init_global (void)
Variables
FFTComplex	exptab0 [512]

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Define Documentation

#define BF	(	pre,
		pim,
		qre,
		qim,
		pre1,
		pim1,
		qre1,
		qim1		)

Value:

{ \
  int32_t ax, ay, bx, by; \
  bx=pre1; \
  by=pim1; \
  ax=qre1; \
  ay=qim1; \
  pre = (bx + ax); \
  pim = (by + ay); \
  qre = (bx - ax); \
  qim = (by - ay); \
}

Referenced by fft_calc_unscaled().

#define IBSS_ATTR

#define ICODE_ATTR

#define ICONST_ATTR

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Function Documentation

int fft_calc_unscaled	(	FFTContext *	s,
		FFTComplex *	z
	)

References BF, CMUL(), exptab0, FFTComplex::im, FFTContext::inverse, FFTContext::nbits, and FFTComplex::re.

Referenced by ff_imdct_calc().

int fft_init_global

(

void

)

References exptab0, fixdiv32(), fsincos(), i, FFTComplex::im, itofix32, and FFTComplex::re.

Referenced by mdct_init_global().

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Variable Documentation

FFTComplex exptab0[512]

Referenced by fft_calc_unscaled(), and fft_init_global().