Method get_lut_table

src/core/helpers/LUTManager.cpp:138–157

template <typename T>
std::shared_ptr<T> LUTManager::get_lut_table(LUTInfo info)
{
    auto      &map   = get_map<T>();
    const auto itr   = map.find(info);
    auto       s_ptr = (itr != map.end()) ? itr->second.lock() : nullptr; // nullptr if invalid or not found.
    if (s_ptr != nullptr)
    {
        // Found and valid
        return s_ptr; // Return weak ptr as shared ptr
    }
    else
    {
        // Not found, or pointer not valid
        // We do not use make_shared to prevent the weak_ptr keeping the control block alive
        std::shared_ptr<T> ptr(new T);
        init_lut(*ptr, info);
        map[info] = ptr;
        return ptr;
    }
}

template std::shared_ptr<LookupTable256>   LUTManager::get_lut_table<LookupTable256>(LUTInfo info);
template std::shared_ptr<LookupTable65536> LUTManager::get_lut_table<LookupTable65536>(LUTInfo info);