reSIDfp::SincResampler Class Reference

Inheritance diagram for reSIDfp::SincResampler:

List of all members.

Public Member Functions
	SincResampler (const double clockFrequency, const double samplingFrequency, const double highestAccurateFrequency)
bool	input (const int input)
int	output () const
void	reset ()
Public Member Functions inherited from reSIDfp::Resampler
short	getOutput () const

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Constructor & Destructor Documentation

reSIDfp::SincResampler::SincResampler	(	const double	clockFrequency,
		const double	samplingFrequency,
		const double	highestAccurateFrequency
	)

Use a clock freqency of 985248Hz for PAL C64, 1022730Hz for NTSC C64. The default end of passband frequency is pass_freq = 0.9*sample_freq/2 for sample frequencies up to ~ 44.1kHz, and 20kHz for higher sample frequencies.

For resampling, the ratio between the clock frequency and the sample frequency is limited as follows: 125*clock_freq/sample_freq < 16384 E.g. provided a clock frequency of ~ 1MHz, the sample frequency can not be set lower than ~ 8kHz. A lower sample frequency would make the resampling code overfill its 16k sample ring buffer.

The end of passband frequency is also limited: pass_freq <= 0.9*sample_freq/2

E.g. for a 44.1kHz sampling rate the end of passband frequency is limited to slightly below 20kHz. This constraint ensures that the FIR table is not overfilled.

Parameters:

clockFrequency	System clock frequency at Hz
method	sampling method to use
samplingFrequency	Desired output sampling rate

Returns:

success

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Member Function Documentation

bool reSIDfp::SincResampler::input ( const int  sample )

virtual

Input a sample into resampler. Output "true" when resampler is ready with new sample.

Parameters:

sample

Returns:

true when a sample is ready

Implements reSIDfp::Resampler.

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

• SincResampler.h
• SincResampler.cpp