/// <summary>
/// Starts the video capture
/// </summary>
/// <param name="FrameNumber">the frame number to start at.
/// Set to 0 to let the control allocate the frame number</param>
public void Start(ulong frameNumber)
{
try
{
// for safety, call stop, just in case we are already running
this.Stop();
// setup a capture window
m_captureHandlerWindow = WebCamAPI.capCreateCaptureWindowA("WebCap", 0, 0, 0, ImageWidth, ImageHeight, this.Handle.ToInt32(), 0);
// connect to the capture device
Application.DoEvents();
WebCamAPI.SendMessage(m_captureHandlerWindow, WebCamAPI.WM_CAP_CONNECT, 0, 0);
WebCamAPI.SendMessage(m_captureHandlerWindow, WebCamAPI.WM_CAP_SET_PREVIEW, 0, 0);
// set the capture video format (width and height) to the value of the params given at c'tor
WebCamAPI.BitMapInfo bInfo = new WebCamAPI.BitMapInfo();
bInfo.bmiHeader = new WebCamAPI.BitMapInfoHeader();
bInfo.bmiHeader.biSize = (uint)Marshal.SizeOf(bInfo.bmiHeader);
bInfo.bmiHeader.biWidth = ImageWidth;
bInfo.bmiHeader.biHeight = ImageHeight;
bInfo.bmiHeader.biPlanes = 1;
bInfo.bmiHeader.biBitCount = 24;
IntPtr buffer = Marshal.AllocCoTaskMem(Marshal.SizeOf(bInfo));
Marshal.StructureToPtr(bInfo, (IntPtr)buffer, true);
WebCamAPI.SendMessage(m_captureHandlerWindow, WebCamAPI.WM_CAP_SET_VIDEOFORMAT, Marshal.SizeOf(bInfo), (int)buffer);
// set the frame number
this.FrameNumber = frameNumber;
// set the timer information
//this.m_captureTimer.Interval = this.CaptureInterval;
m_timer.Period = this.CaptureInterval;
m_stopped = false;
m_timer.Start();
//this.m_captureTimer.Start();
}
catch (Exception excep)
{
string errorMsg = "An error ocurred while starting the video capture. Check that your webcamera is connected properly and turned on." +
Environment.NewLine + "Error: " + excep.Message;
MessageBox.Show(this, errorMsg, "Start Failed!", MessageBoxButtons.OK, MessageBoxIcon.Error);
this.Stop();
}
}
/// <summary>
/// Stops the video capture
/// </summary>
public void Stop()
{
try
{
// stop the timer
m_stopped = true;
//this.m_captureTimer.Stop();
m_timer.Stop();
// disconnect from the video source
Application.DoEvents();
WebCamAPI.SendMessage(m_captureHandlerWindow, WebCamAPI.WM_CAP_DISCONNECT, 0, 0);
}
catch (Exception ex)
{
string errorMsg = "Failed in Stop(). Error: " + ex.Message;
System.Diagnostics.Debug.WriteLine(errorMsg);
}
}
private void OnCaptureTimer_Tick(object sender, EventArgs e)
{
var a = TimeStamper.Time;
try
{
// pause the timer
//this.m_captureTimer.Stop();
// get the next frame;
WebCamAPI.SendMessage(m_captureHandlerWindow, WebCamAPI.WM_CAP_GET_FRAME, 0, 0);
// paste the frame into the event args image
if (ImageCaptured != null)
{
// copy the frame to the clipboard
WebCamAPI.SendMessage(m_captureHandlerWindow, WebCamAPI.WM_CAP_COPY, 0, 0);
// get from the clipboard
m_tempObj = Clipboard.GetDataObject();
//get bitmap data if there is any data in the clipboard
if (m_tempObj != null)
{
m_tempImg = m_tempObj.GetData(System.Windows.Forms.DataFormats.Bitmap) as Bitmap;
}
/*
* For some reason, the API is not resizing the video
* feed to the width and height provided when the video
* feed was started, so we must resize the image here
*/
//swith to empty frame if no image was captured
if (m_tempImg != null)
{
//m_tempImg = global::CheatGameApp.Properties.Resources.blankTV;
// else
//fires the event
ImageCaptured(this, new WebcamEventArgs(m_tempImg, 0));
}
}
// restart the timer
//Application.DoEvents();
//if (!m_stopped)
// this.m_captureTimer.Start();
timeTest.Add(TimeStamper.Time - baseTime);
baseTime = TimeStamper.Time;
}
catch (Exception ex)
{
string errorMsg = "An error ocurred while capturing the video image. The video capture will now be terminated." +
Environment.NewLine + "Error: " + ex.Message;
MessageBox.Show(this, errorMsg, "Failed Capture Timer Tick!", MessageBoxButtons.OK, MessageBoxIcon.Error);
this.Stop(); // stop the process
}
}
