in src/cubeb_resampler_internal.h [150:160]
virtual long latency()
{
if (input_processor && output_processor) {
assert(input_processor->latency() == output_processor->latency());
return input_processor->latency();
} else if (input_processor) {
return input_processor->latency();
} else {
return output_processor->latency();
}
}