Method SetDirectionHint

src/FrameMapper.cpp:1120–1125

Set direction hint for the next call to GetFrame

// Set direction hint for the next call to GetFrame
void FrameMapper::SetDirectionHint(const bool increasing)
{
	const std::lock_guard<std::recursive_mutex> lock(directionMutex);
	hint_increasing = increasing;
	have_hint = true;
}