Common::MDCT Class Reference

(Inverse) Modified Discrete Cosine Transforms. More...

#include <mdct.h>

Inheritance diagram for Common::MDCT:

Collaboration diagram for Common::MDCT:

Public Member Functions
	MDCT (int bits, bool inverse, double scale)
	~MDCT ()
void	calcMDCT (float *output, const float *input)
	Compute MDCT of size N = 2^nbits. More...
void	calcIMDCT (float *output, const float *input)
	Compute inverse MDCT of size N = 2^nbits. More...

Private Member Functions
void	calcHalfIMDCT (float *output, const float *input)
	Compute the middle half of the inverse MDCT of size N = 2^nbits, thus excluding the parts that can be derived by symmetry. More...

Private Attributes
int	_bits
int	_size
ScopedArray< float >	_tCos
float *	_tSin
ScopedPtr< FFT >	_fft

Detailed Description

(Inverse) Modified Discrete Cosine Transforms.

Definition at line 64 of file mdct.h.

Constructor & Destructor Documentation

MDCT()

Common::MDCT::MDCT	(	int	bits,
		bool	inverse,
		double	scale
	)

Definition at line 58 of file mdct.cpp.

References _bits, _fft, _size, _tCos, _tSin, ABS(), Common::ScopedPtrBase< T, Deallocator >::get(), inverse(), M_PI, and Common::ScopedPtrBase< T, Deallocator >::reset().

Here is the call graph for this function:

~MDCT()

Common::MDCT::~MDCT

(

)

Definition at line 80 of file mdct.cpp.

Member Function Documentation

calcHalfIMDCT()

void Common::MDCT::calcHalfIMDCT ( float *  output, const float *  input  )

private

Compute the middle half of the inverse MDCT of size N = 2^nbits, thus excluding the parts that can be derived by symmetry.

Definition at line 141 of file mdct.cpp.

References _fft, _size, _tCos, _tSin, CMUL, Common::Complex::im, and Common::Complex::re.

Referenced by calcIMDCT().

Here is the caller graph for this function:

calcIMDCT()

void Common::MDCT::calcIMDCT	(	float *	output,
		const float *	input
	)

Compute inverse MDCT of size N = 2^nbits.

Definition at line 129 of file mdct.cpp.

References _size, and calcHalfIMDCT().

Referenced by Sound::WMACodec::calculateIMDCT().

Here is the call graph for this function:

Here is the caller graph for this function:

calcMDCT()

void Common::MDCT::calcMDCT	(	float *	output,
		const float *	input
	)

Compute MDCT of size N = 2^nbits.

Definition at line 88 of file mdct.cpp.

References _fft, _size, _tCos, _tSin, CMUL, Common::Complex::im, and Common::Complex::re.

Member Data Documentation

_bits

int Common::MDCT::_bits

private

Definition at line 76 of file mdct.h.

Referenced by MDCT().

_fft

ScopedPtr<FFT> Common::MDCT::_fft

private

Definition at line 82 of file mdct.h.

Referenced by calcHalfIMDCT(), calcMDCT(), and MDCT().

_size

int Common::MDCT::_size

private

Definition at line 77 of file mdct.h.

Referenced by calcHalfIMDCT(), calcIMDCT(), calcMDCT(), and MDCT().

_tCos

ScopedArray<float> Common::MDCT::_tCos

private

Definition at line 79 of file mdct.h.

Referenced by calcHalfIMDCT(), calcMDCT(), and MDCT().

_tSin

float* Common::MDCT::_tSin

private

Definition at line 80 of file mdct.h.

Referenced by calcHalfIMDCT(), calcMDCT(), and MDCT().

---

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

• src/common/mdct.h
• src/common/mdct.cpp