// safe start
if (totalStreamTime < 15000 && !bCongestionStarted && maxStrain > 50)
{
    currentBitRate = (int)(defaultBitRate * (4.0 / 7.0));

    App->GetVideoEncoder()->SetBitRate(currentBitRate, -1);
    lastAdjustmentTime = renderStartTimeMS;

    bCongestionStarted = true;
}
// lower if congested
else if (totalStreamTime > 15000 && (avgStrain > 50 || maxStrain > 99))
{
    if (renderStartTimeMS - lastAdjustmentTime > 10000)
    {
        if (currentBitRate > defaultBitRate * (4.0 / 7.0))
        {
            currentBitRate = (int)(currentBitRate - pow(currentBitRate / (double)defaultBitRate, 4) * defaultBitRate * 0.1);

            App->GetVideoEncoder()->SetBitRate(currentBitRate, -1);
            lastAdjustmentTime = renderStartTimeMS;
        }
    }
}
// increase if stable
else if (totalStreamTime > 15000 && currentBitRate < defaultBitRate && avgStrain < 5 && maxStrain < 15)
{
    if (renderStartTimeMS - lastAdjustmentTime > 10000)
    {
        if (currentBitRate < defaultBitRate)
        {
            currentBitRate += (int)((1 - pow(currentBitRate / (double)defaultBitRate, 4)) * defaultBitRate * 0.05);
            if (currentBitRate > defaultBitRate)
                currentBitRate = defaultBitRate;

            App->GetVideoEncoder()->SetBitRate(currentBitRate, -1);
            lastAdjustmentTime = renderStartTimeMS;
        }
    }
}