private void ConfigureDevice()
{
const int FRAMERATE = 15; // Depends on video device caps. Generally 4-30.
const int VIDEOWIDTH = 640; // Depends on video device caps
const int VIDEOHEIGHT = 480; // Depends on video device caps
int index = (int)deviceComboBox.Dispatcher.Invoke(new Func<int>(() => deviceComboBox.SelectedIndex));
cam = new Webcam(index, FRAMERATE, VIDEOWIDTH, VIDEOHEIGHT);
}
// Start serving up frames
private void StartWebcam(Webcam cam, ConnectionManager conManager, StreamWriter sw, ImageCodecInfo myImageCodecInfo, EncoderParameters myEncoderParameters)
{
MemoryStream m = new MemoryStream(20000);
Bitmap image = null;
IntPtr ip = IntPtr.Zero;
Font fontOverlay = new Font("Times New Roman", 14, System.Drawing.FontStyle.Bold,
System.Drawing.GraphicsUnit.Point);
MotionDetector motionDetector = new MotionDetector();
DateTime lastMotion = DateTime.Now;
int interval = 5;
stopCondition = false;
isRecording = false;
player = new System.Media.SoundPlayer();
motionDetector.MotionLevelCalculation = true;
player.LoadCompleted += new System.ComponentModel.AsyncCompletedEventHandler((obj, arg) => player.PlayLooping());
cam.Start();
while (!stopCondition)
{
try
{
// capture image
ip = cam.GetBitMap();
image = new Bitmap(cam.Width, cam.Height, cam.Stride, System.Drawing.Imaging.PixelFormat.Format24bppRgb, ip);
image.RotateFlip(RotateFlipType.RotateNoneFlipY);
motionDetector.ProcessFrame(ref image);
if (motionDetector.MotionLevel >= alarmLevel)
{
if (!isRecording && (DateTime.Now.Second % interval == 0))
conManager.SendMessage("record");
lastMotion = DateTime.Now;
}
else
{
if (DateTime.Now.Subtract(lastMotion).Seconds > interval)
{
if (isRecording)
{
conManager.SendMessage("stop-record");
isRecording = false;
}
if (isAlarming)
{
player.Stop();
isAlarming = false;
}
}
}
// add text that displays date time to the image
image.AddText(fontOverlay, 10, 10, DateTime.Now.ToString());
// save it to jpeg using quality options
image.Save(m, myImageCodecInfo, myEncoderParameters);
// send the jpeg image if server requests it
if (requested)
conManager.SendImage(m);
}
catch (Exception ex)
{
try
{
sw.WriteLine(DateTime.Now.ToString());
sw.WriteLine(ex);
}
catch { }
}
finally
{
// Empty the stream
m.SetLength(0);
// remove the image from memory
if (image != null)
{
image.Dispose();
image = null;
}
if (ip != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(ip);
ip = IntPtr.Zero;
}
}
}
cam.Pause();
player.Stop();
fontOverlay.Dispose();
}
