AForge.Video.ScreenCaptureStream.WorkerThread C# (CSharp) Method

		private void WorkerThread( )
		{
			int width = region.Width;
			int height = region.Height;
			int x = region.Location.X;
			int y = region.Location.Y;
			System.Drawing.Size size = region.Size;

			System.Drawing.Bitmap bitmap = new System.Drawing.Bitmap(width, height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
			System.Drawing.Graphics graphics = System.Drawing.Graphics.FromImage(bitmap);

			// download start time and duration
			DateTime start;
			TimeSpan span;

			while ( !stopEvent.WaitOne( 0, false ) )
			{
				// set dowbload start time
				start = DateTime.Now;

				try
				{
					// capture the screen
					graphics.CopyFromScreen(x, y, 0, 0, size, System.Drawing.CopyPixelOperation.SourceCopy);

					// increment frames counter
					framesReceived++;

					// provide new image to clients
					if ( NewFrame != null )
					{
						// notify client
						NewFrame( this, new NewFrameEventArgs( bitmap ) );
					}

					// wait for a while ?
					if ( frameInterval > 0 )
					{
						// get download duration
						span = DateTime.Now.Subtract( start );

						// miliseconds to sleep
						int msec = frameInterval - (int) span.TotalMilliseconds;

						if ( ( msec > 0 ) && ( stopEvent.WaitOne( msec, false ) ) )
							break;
					}
				}
				catch ( ThreadAbortException )
				{
					break;
				}
				catch ( Exception exception )
				{
					// provide information to clients
					if ( VideoSourceError != null )
					{
						VideoSourceError( this, new VideoSourceErrorEventArgs( exception.Message ) );
					}
					// wait for a while before the next try
					Thread.Sleep( 250 );
				}

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

			// release resources
			graphics.Dispose( );
			bitmap.Dispose( );

			if ( PlayingFinished != null )
			{
				PlayingFinished( this, ReasonToFinishPlaying.StoppedByUser );
			}
		}
	}