internal static long GetNumberOfFramesInSet(long realSampleLengthNs, FpsConfig fpsConfig)
{
float realSampleLengthMs = TimeUnit.Milliseconds.Convert(realSampleLengthNs, TimeUnit.Nanoseconds);
float size = realSampleLengthMs / fpsConfig.DeviceRefreshRateInMs;
return((long)Math.Round(size));
}
/// <summary>
/// stops the frame callback and foreground listener
/// nulls out static variables
/// called from FPSLibrary in a static context
/// </summary>
/// <param name="context">Context.</param>
internal static void Hide(Context context)
{
// tell callback to stop registering itself
fpsFrameCallback.Enabled = false;
Foreground.SharedInstance(context).RemoveListener(foregroundListener);
// remove the view from the window
tinyCoach.Destroy();
// null it all out
tinyCoach = null;
fpsFrameCallback = null;
fpsConfig = null;
}
public static KeyValuePair <Metric, long> CalculateMetric(FpsConfig fpsConfig,
List <long> dataSet,
List <int> droppedSet)
{
var timeInNS = dataSet.Last() - dataSet.First();
var size = GetNumberOfFramesInSet(timeInNS, fpsConfig);
//metric
int runningOver = 0;
// total dropped
int dropped = 0;
foreach (var k in droppedSet)
{
dropped += k;
if (k >= 2)
{
runningOver += k;
}
}
var multiplier = fpsConfig.RefreshRate / size;
var answer = multiplier * (size - dropped);
var realAnswer = (long)Math.Round(answer);
// calculate metric
var percentOver = runningOver / (float)size;
var metric = Metric.Good;
if (percentOver >= fpsConfig.RedFlagPercentage)
{
metric = Metric.Bad;
}
else if (percentOver >= fpsConfig.YellowFlagPercentage)
{
metric = Metric.Medium;
}
return(new KeyValuePair <Metric, long>(metric, realAnswer));
}
public static List <int> GetDroppedSet(FpsConfig fpsConfig, List <long> dataSet)
{
var droppedSet = new List <int>();
long start = -1;
foreach (var item in dataSet)
{
if (start == -1)
{
start = item;
continue;
}
var droppedCount = DroppedCount(start, item, fpsConfig.DeviceRefreshRateInMs);
if (droppedCount > 0)
{
droppedSet.Add(droppedCount);
}
start = item;
}
return(droppedSet);
}
public FpsFrameCallback(FpsConfig fpsConfig, TinyCoach tinyCoach)
{
this.fpsConfig = fpsConfig;
this.tinyCoach = tinyCoach;
dataSet = new List <long>();
}
internal TinyDancerBuilder()
{
fpsConfig = new FpsConfig();
}
