Wrapper class for the FFT implementation. More...

#include <fft.h>

Public Member Functions
void	reset ()

int	to_bin_index (const T frequency) const noexcept
	Map frequency to bin index.

T	medium_bin_frequency (uint16_t index) const noexcept
	center frequency of a linear bin

T	min_bin_frequency (uint16_t index) const noexcept
	min frequency of a linear bin

T	max_bin_frequency (uint16_t index) const noexcept
	max frequency of a linear bin

T	get_log_bin_min_frequency (uint16_t index) const noexcept
	get the minimum frequency represented by the fft bin at index

T	get_log_bin_max_frequency (uint16_t index) const noexcept
	get the minimum frequency represented by the fft bin at index

void	set_data (const T data, uint16_t index)
	Set the microphone data at the target index.

void	run_fast_fourrier_transform ()
	Run FFT main code.

Public Attributes
std::array< T, samplesFFTRes >	fftBin
	output variables

std::array< T, resultSize >	fftLog
	fft result as a log scale

T	maxMagnitude
	maximum detected frequency magnitude

T	maxFrequency
	maximum detected frequency, in Hertz

Detailed Description

template<uint16_t samplesFFT, uint16_t resultSize, typename T = float>
class lampda::utils::fft::FftAnalyzer< samplesFFT, resultSize, T >

Wrapper class for the FFT implementation.

Parameters

[in]	samplesFFT	Is the input frequency bins before analysis
[in]	resultSize	Is the resulting frequency bins after analysis

Member Function Documentation

template<uint16_t samplesFFT, uint16_t resultSize, typename T = float>

T lampda::utils::fft::FftAnalyzer< samplesFFT, resultSize, T >::get_log_bin_max_frequency ( uint16_t index ) const

inlinenoexcept

get the minimum frequency represented by the fft bin at index

Parameters

[in] index index of the fft bin

template<uint16_t samplesFFT, uint16_t resultSize, typename T = float>

T lampda::utils::fft::FftAnalyzer< samplesFFT, resultSize, T >::get_log_bin_min_frequency ( uint16_t index ) const

inlinenoexcept

get the minimum frequency represented by the fft bin at index

Parameters

[in] index index of the fft bin

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