public MotionEventArgs(Magnitude m, String name, ref Bitmap image, DateTime startTime, DateTime endTime)
{
Severity = m;
VideoName = name;
Screenshot = image;
StartTime = startTime;
EndTime = EndTime;
}
public YAMDDetector(IVideoSource source, Magnitude low, Magnitude medium, Magnitude high)
{
detector = new MotionDetector(
new SimpleBackgroundModelingDetector(),
new BlobCountingObjectsProcessing(true));
//async video source processes images in a separate thread and uses the NewFrame event
inputStream = new AsyncVideoSource(source);
inputStream.NewFrame += inputStream_NewFrame;
this.low = low;
this.medium = medium;
this.high = high;
timer = new Stopwatch();
stoptimer = new Stopwatch();
videoRecorder = new VideoFileWriter();
Running = false;
buffer = new FixedSizeQueue<Bitmap>();
buffer.Limit = 50;
magnitudes = new Queue<int>();
}
private void inputStream_NewFrame(object sender, NewFrameEventArgs e)
{
lock (this)
{
Bitmap image = e.Frame;
Magnitude m = null;
float motionLevel = detector.ProcessFrame(image);
int level = (int)Math.Floor(motionLevel * 100);
if (level >= high.Sensitivity)
{
m = high;
magnitudes.Enqueue(3);
}
else if (level >= medium.Sensitivity)
{
m = medium;
magnitudes.Enqueue(2);
}
else if (level >= low.Sensitivity)
{
m = low;
magnitudes.Enqueue(1);
}
else
magnitudes.Enqueue(0);
if (Recording)
{
videoRecorder.WriteVideoFrame(image);
}
if (m != null && !Recording)
{
screenshot = image;
stoptimer.Reset();
gotMagnitude = false;
timer.Start();
filename = DateTime.Now.ToShortDateString() + DateTime.Now.ToString("HH mm") + ".avi";
StartRecording(filename);
}
else
{
buffer.Enqueue(image);
if (Recording && stoptimer.IsRunning)
if (timer.ElapsedMilliseconds > Timeout || stoptimer.ElapsedMilliseconds > stopCondition)
{
StopRecording();
long vidDuration = timer.ElapsedMilliseconds;
timer.Reset();
stoptimer.Reset();
magnitudes.Clear();
Magnitude n;
switch (videoMagnitude)
{
case 3:
n = new Magnitude(Level.High, vidDuration, high.Sensitivity);
break;
case 2:
n = new Magnitude(Level.Medium, vidDuration, medium.Sensitivity);
break;
default:
n = new Magnitude(Level.Low, vidDuration, low.Sensitivity);
break;
}
OnMotionEvent(new MotionEventArgs(m, filename, ref screenshot, startTime, DateTime.Now));
}
else if (timer.ElapsedMilliseconds >= 5000 || timer.ElapsedMilliseconds <= 6000 && !gotMagnitude)
{
videoMagnitude = checkMagnitude(ref magnitudes);
gotMagnitude = true;
}
else
stoptimer.Start();
}
}
/*
lock (this)
{
float motionLevel = detector.ProcessFrame(image);
if (motionLevel > motionAlarmLevel)
{
// flash for 2 seconds
flash = (int)(2 * (1000 / alarmTimer.Interval));
}
// accumulate history
motionHistory.Add(motionLevel);
if (motionHistory.Count > 300)
{
motionHistory.RemoveAt(0);
}
if (showMotionHistoryToolStripMenuItem.Checked)
DrawMotionHistory(image);
}
*/
}
