Common::DCT Class Reference

(Inverse) Discrete Cosine Transforms. More...

#include <dct.h>

Inheritance diagram for Common::DCT:

Collaboration diagram for Common::DCT:

Public Types
enum	TransformType { DCT_II, DCT_III, DCT_I, DST_I }

Public Member Functions
	DCT (int bits, TransformType trans)
	~DCT ()
void	calc (float *data)

Private Member Functions
void	calcDCTI (float *data)
void	calcDCTII (float *data)
void	calcDCTIII (float *data)
void	calcDSTI (float *data)

Private Attributes
int	_bits
TransformType	_trans
const float *	_tCos
ScopedPtr< RDFT >	_rdft
ScopedArray< float >	_csc2

Detailed Description

(Inverse) Discrete Cosine Transforms.

Definition at line 66 of file dct.h.

Member Enumeration Documentation

TransformType

enum Common::DCT::TransformType

Enumerator
DCT_II
DCT_III
DCT_I
DST_I

Definition at line 68 of file dct.h.

Constructor & Destructor Documentation

DCT()

Common::DCT::DCT	(	int	bits,
		TransformType	trans
	)

Definition at line 60 of file dct.cpp.

References _bits, _csc2, _rdft, _tCos, _trans, DCT_III, Common::RDFT::DFT_R2C, Common::getCosineTable(), Common::RDFT::IDFT_C2R, M_PI, and Common::ScopedPtrBase< T, Deallocator >::reset().

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~DCT()

Common::DCT::~DCT

(

)

Definition at line 73 of file dct.cpp.

Member Function Documentation

calc()

void Common::DCT::calc

(

float *

data

)

Definition at line 76 of file dct.cpp.

References _trans, calcDCTI(), calcDCTII(), calcDCTIII(), calcDSTI(), DCT_I, DCT_II, DCT_III, and DST_I.

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calcDCTI()

void Common::DCT::calcDCTI ( float *  data )

private

Definition at line 101 of file dct.cpp.

References _bits, _rdft, COS, and SIN.

Referenced by calc().

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calcDCTII()

void Common::DCT::calcDCTII ( float *  data )

private

Definition at line 133 of file dct.cpp.

References _bits, _rdft, COS, and SIN.

Referenced by calc().

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calcDCTIII()

void Common::DCT::calcDCTIII ( float *  data )

private

Definition at line 170 of file dct.cpp.

References _bits, _csc2, _rdft, COS, and SIN.

Referenced by calc().

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calcDSTI()

void Common::DCT::calcDSTI ( float *  data )

private

Definition at line 204 of file dct.cpp.

References _bits, _rdft, and SIN.

Referenced by calc().

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Member Data Documentation

_bits

int Common::DCT::_bits

private

Definition at line 81 of file dct.h.

Referenced by calcDCTI(), calcDCTII(), calcDCTIII(), calcDSTI(), and DCT().

_csc2

ScopedArray<float> Common::DCT::_csc2

private

Definition at line 88 of file dct.h.

Referenced by calcDCTIII(), and DCT().

_rdft

ScopedPtr<RDFT> Common::DCT::_rdft

private

Definition at line 86 of file dct.h.

Referenced by calcDCTI(), calcDCTII(), calcDCTIII(), calcDSTI(), and DCT().

_tCos

const float* Common::DCT::_tCos

private

Definition at line 84 of file dct.h.

Referenced by DCT().

_trans

TransformType Common::DCT::_trans

private

Definition at line 82 of file dct.h.

Referenced by calc(), and DCT().

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The documentation for this class was generated from the following files:

• src/common/dct.h
• src/common/dct.cpp