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JPEGStream.cs ( File view )

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			// Motion Detector
//
// Copyright  Andrew Kirillov, 2005
// andrew.kirillov@gmail.com
//
namespace VideoSource
{

	using System;
	using System.Drawing;
	using System.IO;
	using System.Threading;
	using System.Net;

	/// 
	/// JPEGSource - JPEG downloader
	/// 
	public class JPEGStream : IVideoSource
	{

		private string	source;
		private string	login = null;
		private string	password = null;
		private object	userData = null;
		private int		framesReceived;
		private int		bytesReceived;
		private bool	useSeparateConnectionGroup = false;
		private bool	preventCaching = false;
		private int		frameInterval = 0;		// frame interval in miliseconds

		private const int	bufSize = 512 * 1024;	// buffer size
		private const int	readSize = 1024;		// portion size to read

		private Thread	thread = null;
		private ManualResetEvent stopEvent = null;

		// new frame event
		public event CameraEventHandler NewFrame;

		// SeparateConnectioGroup property
		// indicates to open WebRequest in separate connection group
		public bool	SeparateConnectionGroup
		{

			get {
 return useSeparateConnectionGroup; 
}
			set {
 useSeparateConnectionGroup = value; 
}
		
}
		// PreventCaching property
		// If the property is set to true, we are trying to prevent caching
		// appneding fake parameter to URL. It's needed is client is behind
		// proxy server.
		public bool	PreventCaching
		{

			get {
 return preventCaching; 
}
			set {
 preventCaching = value; 
}
		
}
		// FrameInterval property - interval between frames
		// If the property is set 100, than the source will produce 10 frames
		// per second if it possible
		public int FrameInterval
		{

			get {
 return frameInterval; 
}
			set {
 frameInterval = value; 
}
		
}
		// VideoSource property
		public virtual string VideoSource
		{

			get {
 return source; 
}
			set {
 source = value; 
}
		
}
		// Login property
		public string Login
		{

			get {
 return login; 
}
			set {
 login = value; 
}
		
}
		// Password property
		public string Password
		{

			get {
 return password; 
}
			set {
 password = value; 
}
		
}
		// FramesReceived property
		public int FramesReceived
		{

			get
			{

				int frames = framesReceived;
				framesReceived = 0;
				return frames;
			
}
		
}
		// BytesReceived property
		public int BytesReceived
		{

			get
			{

				int bytes = bytesReceived;
				bytesReceived = 0;
				return bytes;
			
}
		
}
		// UserData property
		public object UserData
		{

			get {
 return userData; 
}
			set {
 userData = value; 
}
		
}
		// Get state of the video source thread
		public bool Running
		{

			get
			{

				if (thread != null)
				{

					if (thread.Join(0) == false)
						return true;

					// the thread is not running, so free resources
					Free();
				
}
				return false;
			
}
		
}

		// Constructor
		public JPEGStream()
		{

		
}

		// Start work
		public void Start()
		{

			if (thread == null)
			{

				framesReceived = 0;
				bytesReceived = 0;

				// create events
				stopEvent	= new ManualResetEvent(false);
				
				// create and start new thread
				thread = new Thread(new ThreadStart(WorkerThread));
				thread.Name = source;
				thread.Start();
			
}
		
}

		// Signal thread to stop work
		public void SignalToStop()
		{

			// stop thread
			if (thread != null)
			{

				// signal to stop
				stopEvent.Set();
			
}
		
}

		// Wait for thread stop
		public void WaitForStop()
		{

			if (thread != null)
			{

				// wait for thread stop
				thread.Join();

				Free();
			
}
		
}

		// Abort thread
		public void Stop()
		{

			if (this.Running)
			{

				thread.Abort();
				WaitForStop();
			
}
		
}

		// Free resources
		private void Free()
		{

			thread = null;

			// release events
			stopEvent.Close();
			stopEvent = null;
		
}

		// Thread entry point
		public void WorkerThread()
		{

			byte[]			buffer = new byte[bufSize];	// buffer to read stream
			HttpWebRequest	req = null;
			WebResponse		resp = null;
			Stream			stream = null;
			Random			rnd = new Random((int) DateTime.Now.Ticks);
			DateTime		start;
			TimeSpan		span;

			while (true)
			{

				int	read, total = 0;

				try
				{

					start = DateTime.Now;

					// create request
					if (!preventCaching)
					{

						req = (HttpWebRequest) WebRequest.Create(source);
					
}
					else
					{

						req = (HttpWebRequest) WebRequest.Create(source + ((source.IndexOf('?') == -1) ? '?' : '&') + "fake=" + rnd.Next().ToString());
					
}
					// set login and password
					if ((login != null) && (password != null) && (login != ""))
						req.Credentials = new NetworkCredential(login, password);
					// set connection group name
					if (useSeparateConnectionGroup)
						req.ConnectionGroupName = GetHashCode().ToString();
					// get response
					resp = req.GetResponse();

					// get response stream
					stream = resp.GetResponseStream();

					// loop
					while (!stopEvent.WaitOne(0, true))
					{

						// check total read
						if (total > bufSize - readSize)
						{

							System.Diagnostics.Debug.WriteLine("flushing");
							total = 0;
						
}

						// read next portion from stream
						if ((read = stream.Read(buffer, total, readSize)) == 0)
							break;

						total += read;

						// increment received bytes counter
						bytesReceived += read;
					
}

					if (!stopEvent.WaitOne(0, true))
					{

						// increment frames counter
						framesReceived++;

						// image at stop
						if (NewFrame != null)
						{

							Bitmap	bmp = (Bitmap) Bitmap.FromStream(new MemoryStream(buffer, 0, total));
							// notify client
							NewFrame(this, new CameraEventArgs(bmp));
							// release the image
							bmp.Dispose();
							bmp = null;
						
}
					
}

					// wait for a while ?
					if (frameInterval > 0)
					{

						// times span
						span = DateTime.Now.Subtract(start);
						// miliseconds to sleep
						int msec = frameInterval - (int) span.TotalMilliseconds;

						while ((msec > 0) && (stopEvent.WaitOne(0, true) == false))
						{

							// sleeping ...
							Thread.Sleep((msec < 100) ? msec : 100);
							msec -= 100;
						
}
					
}
				
}
				catch (WebException ex)
				{

					System.Diagnostics.Debug.WriteLine("=============: " + ex.Message);
					// wait for a while before the next try
					Thread.Sleep(250);
				
}
				catch (Exception ex)
				{

					System.Diagnostics.Debug.WriteLine("=============: " + ex.Message);
				
}
				finally
				{

					// abort request
					if (req != null)
					{

						req.Abort();
						req = null;
					
}
					// close response stream
					if (stream != null)
					{

						stream.Close();
						stream = null;
					
}
					// close response
					if (resp != null)
					{

						resp.Close();
						resp = null;
					
}
				
}

				// need to stop ?
				if (stopEvent.WaitOne(0, true))
					break;
			
}
		
}
	
}

}
			
...
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Name Size Date
01.96 kB
01.96 kB
AssemblyInfo.cs2.37 kB2006-04-11 11:57
01.96 kB
01.96 kB
dshow.dll32.00 kB2007-06-13 21:51
dshow.pdb25.50 kB2007-06-13 21:51
01.96 kB
dshow.dll32.00 kB2007-06-07 20:26
01.96 kB
1.txt45.00 B2006-04-11 11:57
IBaseFilter.cs2.14 kB2006-04-11 11:57
IBasicVideo.cs4.70 kB2006-04-11 11:57
ICreateDevEnum.cs592.00 B2006-04-11 11:57
IEnumPins.cs831.00 B2006-04-11 11:57
IFileSourceFilter.cs861.00 B2006-04-11 11:57
IFilterGraph.cs1.58 kB2006-04-11 11:57
IGraphBuilder.cs2.84 kB2006-04-11 11:57
IMediaControl.cs1.49 kB2006-04-11 11:57
IMediaEvent.cs3.06 kB2006-04-11 11:57
IMediaPosition.cs1.88 kB2006-04-11 11:57
IMediaSeeking.cs2.79 kB2006-04-11 11:57
IPin.cs2.36 kB2006-04-11 11:57
IPropertyBag.cs853.00 B2006-04-11 11:57
ISampleGrabber.cs2.21 kB2006-04-11 11:57
IVideoFrameStep.cs747.00 B2006-04-11 11:57
IVideoWindow.cs5.90 kB2006-04-11 11:57
Structures.cs4.37 kB2006-04-11 11:57
Uuids.cs4.87 kB2006-04-11 11:57
Win32.cs919.00 B2006-04-11 11:57
dshow.csproj5.38 kB2007-03-16 20:38
Filter.cs2.57 kB2006-04-11 11:57
FilterCollection.cs2.14 kB2006-04-11 11:57
01.96 kB
01.96 kB
dshow.dll32.00 kB2007-06-13 21:51
dshow.pdb25.50 kB2007-06-13 21:51
01.96 kB
dshow.csproj.FileList.txt216.00 B2007-06-15 15:17
01.96 kB
dshow.dll32.00 kB2007-06-07 20:26
01.96 kB
dshow.dll28.00 kB2007-06-07 18:09
01.96 kB
Tools.cs1.11 kB2006-04-11 11:57
motion.sln1.79 kB2007-03-16 20:38
motion.suo35.00 kB2007-06-15 15:08
01.96 kB
AboutForm.cs11.91 kB2007-06-15 15:17
AboutForm.resx9.77 kB2007-06-15 15:17
App.ico26.07 kB2006-04-11 11:57
AssemblyInfo.cs2.47 kB2007-03-20 08:40
01.96 kB
01.96 kB
AForge.dll20.00 kB2007-03-16 19:54
AForge.Imaging.dll108.00 kB2007-03-19 18:42
AForge.Math.dll28.00 kB2007-03-16 19:54
App.ico26.07 kB2006-04-11 11:57
dshow.dll32.00 kB2007-06-13 21:51
dshow.pdb25.50 kB2007-06-13 21:51
motion.exe132.00 kB2007-06-15 15:17
motion.exe.config147.00 B2007-03-19 09:20
motion.pdb181.50 kB2007-06-15 15:17
motion.vshost.exe5.50 kB2005-09-23 07:56
motion.vshost.exe.config147.00 B2007-03-19 09:20
Tiger.Video.VFW.dll24.00 kB2007-06-13 21:51
Tiger.Video.VFW.pdb27.50 kB2007-06-13 21:51
01.96 kB
AForge.dll20.00 kB2007-03-16 19:54
AForge.Imaging.dll108.00 kB2007-03-19 18:42
AForge.Math.dll28.00 kB2007-03-16 19:54
dshow.dll32.00 kB2007-06-07 20:26
motion.exe124.00 kB2007-06-07 20:40
motion.exe.config147.00 B2007-03-19 09:20
motion.vshost.exe5.50 kB2005-09-23 07:56
motion.vshost.exe.config147.00 B2007-03-19 09:20
Tiger.Video.VFW.dll24.00 kB2007-06-07 20:26
Camera.cs3.47 kB2006-04-11 11:57
CameraWindow.cs5.17 kB2006-04-11 11:57
CameraWindow.resx5.55 kB2006-04-11 11:57
CaptureDeviceForm.cs4.49 kB2007-06-15 15:17
CaptureDeviceForm.resx5.37 kB2006-04-11 11:57
ClassDiagram1.cd1.00 B2007-06-07 18:39
Copyright.txt913.00 B2007-06-15 15:17
IMotionDetector.cs785.00 B2007-06-07 20:36
MainForm.cs21.34 kB2007-06-13 21:54
MainForm.resx45.81 kB2007-06-13 21:51
motion.csproj7.33 kB2007-06-07 18:45
MotionDetector1.cs9.95 kB2007-06-07 20:37
MotionDetector2.cs4.44 kB2007-06-07 20:38
MotionDetector3.cs5.06 kB2007-06-07 20:38
MotionDetector3Optimized.cs6.57 kB2007-06-07 20:38
MotionDetector4.cs4.89 kB2007-06-07 20:38
01.96 kB
01.96 kB
motion.AboutForm.resources3.00 kB2007-06-15 15:17
motion.CameraWindow.resources581.00 B2007-06-13 21:51
motion.CaptureDeviceForm.resources279.00 B2007-06-13 21:51
motion.csproj.GenerateResource.Cache1.00 kB2007-06-15 15:17
motion.exe132.00 kB2007-06-15 15:17
motion.MainForm.resources26.62 kB2007-06-13 21:51
motion.pdb181.50 kB2007-06-15 15:17
motion.Resources.1.gif828.00 B2006-04-11 11:57
motion.Resources.2.gif822.00 B2006-04-11 11:57
motion.Resources.3.gif830.00 B2006-04-11 11:57
motion.Resources.4.gif822.00 B2006-04-11 11:57
motion.Resources.5.gif822.00 B2006-04-11 11:57
motion.Resources.6.gif830.00 B2006-04-11 11:57
motion.Resources.7.gif821.00 B2006-04-11 11:57
motion.Resources.8.gif822.00 B2006-04-11 11:57
motion.Resources.9.gif822.00 B2006-04-11 11:57
motion.URLForm.resources269.00 B2007-06-13 21:51
ResolveAssemblyReference.cache13.42 kB2007-06-15 14:58
01.96 kB
motion.csproj.FileList.txt1.64 kB2007-06-15 15:17
01.96 kB
motion.AboutForm.resources3.00 kB2007-06-07 20:26
motion.CameraWindow.resources581.00 B2007-06-07 20:26
motion.CaptureDeviceForm.resources279.00 B2007-06-07 20:26
motion.csproj.GenerateResource.Cache1.00 kB2007-06-07 20:27
motion.exe124.00 kB2007-06-07 20:40
motion.MainForm.resources26.62 kB2007-06-07 20:27
motion.Resources.1.gif828.00 B2006-04-11 11:57
motion.Resources.2.gif822.00 B2006-04-11 11:57
motion.Resources.3.gif830.00 B2006-04-11 11:57
motion.Resources.4.gif822.00 B2006-04-11 11:57
motion.Resources.5.gif822.00 B2006-04-11 11:57
motion.Resources.6.gif830.00 B2006-04-11 11:57
motion.Resources.7.gif821.00 B2006-04-11 11:57
motion.Resources.8.gif822.00 B2006-04-11 11:57
motion.Resources.9.gif822.00 B2006-04-11 11:57
motion.URLForm.resources269.00 B2007-06-07 20:26
01.96 kB
ResolveAssemblyReference.cache10.44 kB2007-06-07 20:26
01.96 kB
01.96 kB
1.gif828.00 B2006-04-11 11:57
2.gif822.00 B2006-04-11 11:57
3.gif830.00 B2006-04-11 11:57
4.gif822.00 B2006-04-11 11:57
5.gif822.00 B2006-04-11 11:57
6.gif830.00 B2006-04-11 11:57
7.gif821.00 B2006-04-11 11:57
8.gif822.00 B2006-04-11 11:57
9.gif822.00 B2006-04-11 11:57
UnsafeBitmap.cs2.76 kB2007-06-15 14:58
URLForm.cs3.98 kB2006-04-11 11:57
URLForm.resx5.36 kB2006-04-11 11:57
01.96 kB
ByteArrayUtils.cs1.25 kB2006-04-11 11:57
CameraEvents.cs626.00 B2006-04-11 11:57
CaptureDevice.cs8.15 kB2006-04-11 11:57
IVideoSource.cs1.57 kB2006-04-11 11:57
JPEGStream.cs6.89 kB2006-04-11 11:57
MJPEGStream.cs9.12 kB2006-04-11 11:57
VideoFileSource.cs3.45 kB2006-04-11 11:57
VideoStream.cs8.47 kB2006-04-11 11:57
01.96 kB
AForge.dll20.00 kB2007-03-16 19:54
AForge.Imaging.dll108.00 kB2007-03-19 18:42
AForge.Math.dll28.00 kB2007-03-16 19:54
01.96 kB
AssemblyInfo.cs2.37 kB2006-04-11 11:57
AVIReader.cs5.29 kB2006-04-11 11:57
AVIWriter.cs5.59 kB2006-04-11 11:57
01.96 kB
01.96 kB
Tiger.Video.VFW.dll24.00 kB2007-06-13 21:51
Tiger.Video.VFW.pdb27.50 kB2007-06-13 21:51
01.96 kB
Tiger.Video.VFW.dll24.00 kB2007-06-07 20:26
01.96 kB
01.96 kB
01.96 kB
Tiger.Video.VFW.dll24.00 kB2007-06-13 21:51
Tiger.Video.VFW.pdb27.50 kB2007-06-13 21:51
01.96 kB
01.96 kB
Tiger.Video.VFW.dll20.00 kB2007-06-07 18:09
01.96 kB
Tiger.Video.VFW.dll24.00 kB2007-06-07 20:26
vfw.csproj.FileList.txt276.00 B2007-06-15 15:17
vfw.csproj3.55 kB2007-03-16 20:38
Win32.cs9.81 kB2006-04-11 11:57
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