public void UpdateTimer(int intervalSec, int durationMin)
{
DisposeTimer();
watchTimer = new Timer();
watchTimer.Interval = intervalSec * 1000;
watchTimer.Tick += (s, e) =>
{
if (!Watching)
{
return;
}
reduceImageBuffer(durationMin * 60);
HistoryImageItem item = new HistoryImageItem();
using (MemoryStream ms = new MemoryStream())
{
using (Bitmap bmp = CaptureBitmap())
{
bmp.Save(ms, ImageFormat.Png);
item.ImageBytes = ms.GetBuffer();
}
}
item.Timestamp = DateTime.Now;
imageQueue.Enqueue(item);
};
watchTimer.Start();
}
private void reduceImageBuffer(int duration)
{
DateTime now = DateTime.Now;
while (imageQueue.Count > 0)
{
HistoryImageItem item = imageQueue.Peek();
if ((now - item.Timestamp).TotalSeconds > duration)
{
imageQueue.Dequeue();
}
else
{
break;
}
}
}
