void OBStereo::Permutate(OBStereo::Refs &refs, int i, int j)
{
if (i < 0 || i >= refs.size())
return;
if (j < 0 || j >= refs.size())
return;
unsigned long id = refs.at(i);
refs[i] = refs.at(j);
refs[j] = id;
}
OBStereo::Refs OBStereo::Permutated(const OBStereo::Refs &refs, int i, int j)
{
if (i < 0 || i >= refs.size())
return refs;
if (j < 0 || j >= refs.size())
return refs;
OBStereo::Refs result(refs);
result[i] = refs.at(j);
result[j] = refs.at(i);
return result;
}