public void Run()
{
const int VIDEODEVICE = 0; // zero based index of video capture device to use
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
const long JPEGQUALITY = 30; // 1-100 or 0 for default
const int TCPLISTENPORT = 399;
Capture cam = null;
TcpServer serv = null;
ImageCodecInfo myImageCodecInfo;
EncoderParameters myEncoderParameters;
// Set up logging
StreamWriter sw = File.AppendText(@"c:\WebCam.log");
try
{
// Set up member vars
ConnectionReady = new ManualResetEvent(false);
bShutDown = false;
// Set up tcp server
iConnectionCount = 0;
serv = new TcpServer(TCPLISTENPORT, TcpServer.GetAddresses()[0]);
serv.Connected += new TcpConnected(Connected);
serv.Disconnected += new TcpConnected(Disconnected);
serv.DataReceived += new TcpReceive(Receive);
serv.Send += new TcpSend(Send);
myEncoderParameters = null;
myImageCodecInfo = GetEncoderInfo("image/jpeg");
if (JPEGQUALITY != 0)
{
// If not using the default jpeg quality setting
EncoderParameter myEncoderParameter;
myEncoderParameter = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, JPEGQUALITY);
myEncoderParameters = new EncoderParameters(1);
myEncoderParameters.Param[0] = myEncoderParameter;
}
cam = new Capture(VIDEODEVICE, FRAMERATE, VIDEOWIDTH, VIDEOHEIGHT);
// Initialization succeeded. Now, start serving up frames
DoIt(cam, serv, sw, myImageCodecInfo, myEncoderParameters);
}
catch(Exception ex)
{
try
{
sw.WriteLine(String.Format("{0}: Failed on startup {1}", DateTime.Now.ToString(), ex));
}
catch {}
}
finally
{
// Cleanup
if (serv != null)
{
serv.Dispose();
}
if (cam != null)
{
cam.Dispose();
}
sw.Close();
}
}
static void Main(string[] args)
{
const int port = 11000;
var server = new TcpServer(port);
}
// Start serving up frames
private void DoIt(Capture cam, TcpServer serv, StreamWriter sw, ImageCodecInfo myImageCodecInfo, EncoderParameters myEncoderParameters)
{
MemoryStream m = new MemoryStream(20000);
Bitmap image = null;
IntPtr ip = IntPtr.Zero;
do
{
// Wait til a client connects before we start the graph
ConnectionReady.WaitOne();
cam.Start();
// While not shutting down, and still at least one client
while ((!bShutDown) && (serv.Connections > 0))
{
try
{
// capture image
ip = cam.GetBitMap();
image = new Bitmap(cam.Width, cam.Height, cam.Stride, PixelFormat.Format24bppRgb, ip);
image.RotateFlip(RotateFlipType.RotateNoneFlipY);
// save it to jpeg using quality options
m.Position = 10;
image.Save(m, myImageCodecInfo, myEncoderParameters);
// Send the length as a fixed length string
m.Position = 0;
m.Write(Encoding.ASCII.GetBytes( (m.Length - 10).ToString("d8") + "\r\n"), 0, 10);
// send the jpeg image
serv.SendToAll(m);
// Empty the stream
m.SetLength(0);
// remove the image from memory
image.Dispose();
image = null;
}
catch(Exception ex)
{
try
{
sw.WriteLine(DateTime.Now.ToString());
sw.WriteLine(ex);
}
catch {}
}
finally
{
if (ip != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(ip);
ip = IntPtr.Zero;
}
}
}
// Clients have all disconnected. Pause, then sleep and wait for more
cam.Pause();
sw.WriteLine("Dropped frames: " + cam.m_Dropped.ToString());
} while ( !bShutDown );
}
// Start serving up frames
private void DoIt(WebCamRecorder.Capture cam, TcpServer serv, StreamWriter sw, ImageCodecInfo myImageCodecInfo, EncoderParameters myEncoderParameters)
{
MemoryStream m = new MemoryStream(20000);
Bitmap image = null;
IntPtr ip = IntPtr.Zero;
msgListBox.Items.Add("Ready to serve!");
do
{
// Wait til a client connects before we start the graph
ConnectionReady.WaitOne();
cam.Start();
msgListBox.Items.Add("requested");
// While not shutting down, and still at least one client
while ((!bShutDown) && (serv.Connections > 0))
{
try
{
// capture image
ip = cam.GetBitMap();
image = new Bitmap(cam.Width, cam.Height, cam.Stride, PixelFormat.Format24bppRgb, ip);
image.RotateFlip(RotateFlipType.RotateNoneFlipY);
Bitmap bitmapOverlay = new Bitmap(image.Width, image.Height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
Graphics g = Graphics.FromImage(bitmapOverlay);
g.Clear(System.Drawing.Color.Transparent);
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
// Prepare to put the specified string on the image
string text = DateTime.Now.ToString();
SizeF d = g.MeasureString(text, fontOverlay);
float sLeft = 10;
float sTop = 10;
g.FillRectangle(System.Drawing.Brushes.Black, 7, 7, 250, 30);
g.DrawString(text, fontOverlay, System.Drawing.Brushes.White,
sLeft, sTop, System.Drawing.StringFormat.GenericTypographic);
g.Dispose();
g = Graphics.FromImage(image);
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
// draw the overlay bitmap over the video's bitmap
g.DrawImage(bitmapOverlay, 0, 0, bitmapOverlay.Width, bitmapOverlay.Height);
// dispose of the various objects
g.Dispose();
// save it to jpeg using quality options
m.Position = 10;
image.Save(m, myImageCodecInfo, myEncoderParameters);
// Send the length as a fixed length string
m.Position = 0;
m.Write(Encoding.ASCII.GetBytes((m.Length - 10).ToString("d8") + "\r\n"), 0, 10);
// send the jpeg image
serv.SendToAll(m);
// Empty the stream
m.SetLength(0);
// remove the image from memory
image.Dispose();
image = null;
}
catch (Exception ex)
{
try
{
sw.WriteLine(DateTime.Now.ToString());
sw.WriteLine(ex);
}
catch { }
}
finally
{
if (ip != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(ip);
ip = IntPtr.Zero;
}
}
}
// Clients have all disconnected. Pause, then sleep and wait for more
cam.Pause();
sw.WriteLine("Dropped frames: " + cam.m_Dropped.ToString());
} while (!bShutDown);
}
