FFTReal Class Reference

The FFT procedures used by shout are written by Laurent de Soras. More...

List of all members.

Classes
class	BitReversedLUT
	The FFT procedures used by shout are written by Laurent de Soras. More...
class	TrigoLUT
	The FFT procedures used by shout are written by Laurent de Soras. More...
Public Member Functions
	FFTReal (const long length)
	~FFTReal ()
void	do_fft (flt_t f[], const flt_t x[]) const
void	do_ifft (const flt_t f[], flt_t x[]) const
void	rescale (flt_t x[]) const
Private Member Functions
	FFTReal (const FFTReal &other)
const FFTReal &	operator= (const FFTReal &other)
int	operator== (const FFTReal &other)
int	operator!= (const FFTReal &other)
Private Attributes
const int	_nbr_bits
const long	_length
const BitReversedLUT	_bit_rev_lut
const TrigoLUT	_trigo_lut
const flt_t	_sqrt2_2
flt_t *	_buffer_ptr

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Detailed Description

The FFT procedures used by shout are written by Laurent de Soras.

This is his legal message:

LEGAL

Source code may be freely used for any purpose, including commercial applications. Programs must display in their "About" dialog-box (or documentation) a text telling they use these routines by Laurent de Soras. Modified source code can be distributed, but modifications must be clearly indicated.

CONTACT

Laurent de Soras 92 avenue Albert 1er 92500 Rueil-Malmaison France

ldesoras@club-internet.fr

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Constructor & Destructor Documentation

FFTReal::FFTReal

(

const long

length

)

[explicit]

The FFT procedures used by shout are written by Laurent de Soras

References _buffer_ptr, _length, and _nbr_bits.

FFTReal::~FFTReal

(

void

)

The FFT procedures used by shout are written by Laurent de Soras

References _buffer_ptr.

FFTReal::FFTReal

(

const FFTReal &

other

)

[private]

---

Member Function Documentation

void FFTReal::do_fft	(	flt_t	f[],
		const flt_t	x[]
	)			const

The FFT procedures used by shout are written by Laurent de Soras

References _bit_rev_lut, _buffer_ptr, _length, _nbr_bits, _sqrt2_2, _trigo_lut, FFTReal::FFTReal::TrigoLUT::get_ptr(), and FFTReal::FFTReal::BitReversedLUT::get_ptr().

Referenced by FeatureExtraction::createMfccFrame().

Here is the call graph for this function:

void FFTReal::do_ifft	(	const flt_t	f[],
		flt_t	x[]
	)			const

The FFT procedures used by shout are written by Laurent de Soras

References _bit_rev_lut, _buffer_ptr, _length, _nbr_bits, _sqrt2_2, _trigo_lut, FFTReal::FFTReal::BitReversedLUT::get_ptr(), and FFTReal::FFTReal::TrigoLUT::get_ptr().

Here is the call graph for this function:

int FFTReal::operator!=

(

const FFTReal &

other

)

[private]

const FFTReal& FFTReal::operator=

(

const FFTReal &

other

)

[private]

int FFTReal::operator==

(

const FFTReal &

other

)

[private]

void FFTReal::rescale

(

flt_t

x[]

)

const

References _length.

Referenced by FeatureExtraction::createMfccFrame().

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Member Data Documentation

const BitReversedLUT FFTReal::_bit_rev_lut [private]

Referenced by do_fft(), and do_ifft().

flt_t* FFTReal::_buffer_ptr [private]

Referenced by do_fft(), do_ifft(), FFTReal(), and ~FFTReal().

const long FFTReal::_length [private]

Referenced by do_fft(), do_ifft(), FFTReal(), and rescale().

const int FFTReal::_nbr_bits [private]

Referenced by do_fft(), do_ifft(), and FFTReal().

const flt_t FFTReal::_sqrt2_2 [private]

Referenced by do_fft(), and do_ifft().

const TrigoLUT FFTReal::_trigo_lut [private]

Referenced by do_fft(), and do_ifft().