Merge "Surfaceflinger: adjust content detection fps selection" into qt-r1-dev

        return RefreshRateType::PERFORMANCE;

    }

    // Content detection is on, find the appropriate refresh rate

    // Start with the smallest refresh rate which is within a margin of the content

    RefreshRateType currRefreshRateType = RefreshRateType::PERFORMANCE;

    constexpr float MARGIN = 0.05f;

    auto iter = mRefreshRateConfigs.getRefreshRates().cbegin();

    while (iter != mRefreshRateConfigs.getRefreshRates().cend()) {

        if (iter->second->fps >= mContentRefreshRate * (1 - MARGIN)) {

            currRefreshRateType = iter->first;

            break;

        }

        ++iter;

    }

    // Content detection is on, find the appropriate refresh rate with minimal error

    auto iter = min_element(mRefreshRateConfigs.getRefreshRates().cbegin(),

                            mRefreshRateConfigs.getRefreshRates().cend(),

                            [rate = mContentRefreshRate](const auto& l, const auto& r) -> bool {

                                return std::abs(l.second->fps - static_cast<float>(rate)) <

                                        std::abs(r.second->fps - static_cast<float>(rate));

                            });

    RefreshRateType currRefreshRateType = iter->first;

    // Some content aligns better on higher refresh rate. For example for 45fps we should choose

    // 90Hz config. However we should still prefer a lower refresh rate if the content doesn't

    // align well with both

    constexpr float MARGIN = 0.05f;

    float ratio = mRefreshRateConfigs.getRefreshRate(currRefreshRateType)->fps /

            float(mContentRefreshRate);

    if (std::abs(std::round(ratio) - ratio) > MARGIN) {