Base class for many of the effects in Audacity.
Performs effect computation.
Implementation of EffectSettings for cases where there is only one thread.
std::function< void()> SelectAllIfNoneCb
std::function< bool(Effect &, std::shared_ptr< EffectInstance > &, SimpleEffectSettingsAccess &)> ShowEffectHostInterfaceCb
std::function< void()> StopPlaybackCb