al::DelayLockedLoop Class Reference

Self-correcting timer. More...

#include <C:/Users/Andres/source/repos/casm_viewer/external/tinc/external/allolib/include/al/system/al_Time.hpp>

Public Member Functions
	DelayLockedLoop (al_sec step_period, double bandwidth=0.5)
void	setBandwidth (double bandwidth)
	Set degree of smoothing.
void	reset ()
	Call this after an xrun: will reset the timing adjustments.
void	step (al_sec realtime)
	Trigger this from the periodic event. More...
void	operator() (al_sec realtime)
al_sec	period_smoothed () const
	Get the current period estimation (smoothed)
al_sec	rate_smoothed () const
	Get the current rate estimation (smoothed)
al_sec	period_ideal () const
	Get the ideal period.
al_sec	rate_ideal () const
	Get the ideal rate.
al_sec	realtime_interp (double alpha) const
	Returns time estimate between current and next event. More...

Protected Attributes
al_sec	tperiod
al_sec	t0
al_sec	t1
al_sec	t2
double	mB
double	mC
bool	mReset

Detailed Description

Self-correcting timer.

Helper object for events intended to run at a particular rate/period, but which might be subject to drift, latency and jitter. A curve mapping logical to real time can be drawn over an event period by interpolating between t0 and t1

See also

http://kokkinizita.linuxaudio.org/papers/usingdll.pdf

Definition at line 123 of file al_Time.hpp.

Member Function Documentation

realtime_interp()

al_sec al::DelayLockedLoop::realtime_interp ( double  alpha ) const

inline

Returns time estimate between current and next event.

This returns an estimate of corresponding real-time between current event & next by linear interpolation of current event timestamp & projected next event timestamp.

Definition at line 161 of file al_Time.hpp.

step()

void al::DelayLockedLoop::step

(

al_sec

realtime

)

Trigger this from the periodic event.

Parameters

[in]

realtime

source time that we are trying to smoothly follow

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

• al_Time.hpp