dsp::bandlimiter< SIZE_BITS > Struct Template Reference

#include <osc.h>

Public Types
enum	{ SIZE = 1 << SIZE_BITS }

Public Member Functions
void	compute_spectrum (float input[SIZE])
	Import time domain waveform and calculate spectrum from it.
void	compute_waveform (float output[SIZE])
	Generate the waveform from the contained spectrum.
void	remove_dc ()
	remove DC offset of the spectrum (it usually does more harm than good!)
void	make_waveform (float output[SIZE], int cutoff, bool foldover=false)

Static Public Member Functions
static dsp::fft< float, SIZE_BITS > &	get_fft ()

Public Attributes
std::complex< float >	spectrum [SIZE]

Detailed Description

template<int SIZE_BITS>
struct dsp::bandlimiter< SIZE_BITS >

FFT-based bandlimiting helper class. Allows conversion between time and frequency domains and generating brickwall filtered versions of a waveform given a pre-computed spectrum. Waveform size must be a power of two, and template argument SIZE_BITS is log2 of waveform size.

Member Enumeration Documentation

anonymous enum

template<int SIZE_BITS>

anonymous enum

Enumerator
SIZE

Member Function Documentation

compute_spectrum()

template<int SIZE_BITS>

void dsp::bandlimiter< SIZE_BITS >::compute_spectrum ( float input[SIZE] )

inline

Import time domain waveform and calculate spectrum from it.

compute_waveform()

template<int SIZE_BITS>

void dsp::bandlimiter< SIZE_BITS >::compute_waveform ( float output[SIZE] )

inline

Generate the waveform from the contained spectrum.

get_fft()

template<int SIZE_BITS>

dsp::fft< float, SIZE_BITS > & dsp::bandlimiter< SIZE_BITS >::get_fft ( )

inlinestatic

make_waveform()

template<int SIZE_BITS>

void dsp::bandlimiter< SIZE_BITS >::make_waveform ( float output[SIZE], int cutoff, bool foldover = false )

inline

Very basic bandlimiting (brickwall filter) might need to be improved much in future!

remove_dc()

template<int SIZE_BITS>

void dsp::bandlimiter< SIZE_BITS >::remove_dc ( )

inline

remove DC offset of the spectrum (it usually does more harm than good!)

Member Data Documentation

spectrum

template<int SIZE_BITS>

std::complex<float> dsp::bandlimiter< SIZE_BITS >::spectrum[SIZE]

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The documentation for this struct was generated from the following file:

• /home/runner/work/lmms-fork/lmms-fork/plugins/LadspaEffect/calf/veal/src/calf/osc.h