Simple camera programming code!

ShowVideo. cs code:

Namespace webcam
{
Using System;
Using System. Runtime. InteropServices;

Public class showVideo
{
// Methods
Public showVideo ()
{
}

[DllImport ("avicap32.dll")]
Public static extern IntPtr capcreatecapturew.wa (byte [] lpszWindowName, int dwStyle, int x, int y, int nWidth, int nHeight, IntPtr hWndParent, int nID );

[DllImport ("avicap32.dll")]
Public static extern bool capGetDriverDescriptionA (short wDriver, byte [] lpszName, int cbName, byte [] lpszVer, int cbVer );

[DllImport ("avicap32.dll")]
Public static extern int capGetVideoFormat (IntPtr hWnd, IntPtr psVideoFormat, int wSize );

Public static void copy (int ptr, byte [] data)
{
Showvideo. Copy (New intptr (PTR), data );
}

Public static void copy (intptr, byte [] data)
{
Marshal. Copy (PTR, Data, 0, Data. Length );
}

Public static object getstructure (int ptr, valuetype structure)
{
Return showvideo. getstructure (New intptr (PTR), structure );
}

Public static object getstructure (intptr, valuetype structure)
{
Return marshal. ptrtostructure (PTR, structure. GetType ());
}

[Dllimport ("user32.dll")]
Public static extern bool SendMessage (IntPtr hWnd, int wMsg, bool wParam, int lParam );

[DllImport ("User32.dll")]
Public static extern bool SendMessage (IntPtr hWnd, int wMsg, short wParam, int lParam );

[DllImport ("User32.dll")]
Public static extern bool SendMessage (IntPtr hWnd, int wMsg, int wParam, ref BITMAPINFO lParam );

[DllImport ("User32.dll")]
Public static extern int SetWindowPos (IntPtr hWnd, int hWndInsertAfter, int x, int y, int cx, int cy, int wFlags );

Public static int SizeOf (object structure)
{
Return Marshal. SizeOf (structure );
}
 
// Nested Types
[StructLayout (LayoutKind. Sequential)]
Public struct BITMAPINFO
{
[Financialas (UnmanagedType. Struct)]
Public showVideo. BITMAPINFOHEADER bmiHeader;
[Financialas (UnmanagedType. ByValArray, SizeConst = 0x400)]
Public int [] bmiColors;
}

[StructLayout (LayoutKind. Sequential)]
Public struct BITMAPINFOHEADER
{
[Financialas (UnmanagedType. I4)]
Public int biSize;
[Financialas (UnmanagedType. I4)]
Public int biWidth;
[Financialas (UnmanagedType. I4)]
Public int biHeight;
[Financialas (UnmanagedType. I2)]
Public short biplanes;
[Financialas (unmanagedtype. I2)]
Public short bibitcount;
[Financialas (unmanagedtype. I4)]
Public int bicompression;
[Financialas (unmanagedtype. I4)]
Public int bisizeimage;
[Financialas (unmanagedtype. I4)]
Public int bixpelspermeter;
[Financialas (unmanagedtype. I4)]
Public int biypelspermeter;
[Financialas (unmanagedtype. I4)]
Public int biclrused;
[Financialas (unmanagedtype. I4)]
Public int biclrimportant;
}

[Structlayout (layoutkind. Sequential)]
Public struct videohdr
{
[Financialas (unmanagedtype. I4)]
Public int lpdata;
[Financialas (unmanagedtype. I4)]
Public int dwbufferlength;
[Financialas (unmanagedtype. I4)]
Public int dwbytesused;
[Financialas (unmanagedtype. I4)]
Public int dwtimecaptured;
[Financialas (unmanagedtype. I4)]
Public int dwuser;
[Financialas (unmanagedtype. I4)]
Public int dwflags;
[Financialas (unmanagedtype. byvalarray, sizeconst = 4)]
Public int [] dwReserved;
}
}
}

WebCamera. cs code:

Namespace webcam
{
Using System;

Public class WebCamera
{
// Methods
Public WebCamera (IntPtr handle, int width, int height)
{
This. mControlPtr = handle;
This. mWidth = width;
This. mHeight = height;
}

Private bool capDriverConnect (IntPtr lwnd, short I)
{
Return showVideo. SendMessage (lwnd, 0x40a, I, 0 );
}

Private bool capDriverDisconnect (IntPtr lwnd)
{
Return showVideo. SendMessage (lwnd, 0x40b, (short) 0, 0 );
}

Private bool capPreview (IntPtr lwnd, bool f)
{
Return showVideo. SendMessage (lwnd, 0x432, f, 0 );
}

Private bool capPreviewRate (IntPtr lwnd, short wMS)
{
Return showVideo. SendMessage (lwnd, 0x434, wMS, 0 );
}

Private bool capSetVideoFormat (IntPtr hCapWnd, ref showVideo. bitmapinfo bmp format, int CapFormatSize)
{
Return showVideo. SendMessage (hCapWnd, 0x42d, CapFormatSize, ref BMP format );
}

Public void CloseWebcam ()
{
This. capDriverDisconnect (this. lwndC );
}

Public void StartWebCam ()
{
Byte [] buffer1 = new byte [1, 100];
Byte [] buffer2 = new byte [1, 100];
ShowVideo. capGetDriverDescriptionA (0, buffer1, 100, buffer2, 100 );
This. lwndC = showVideo. capcreatecapturew.wa (buffer1, 1342177280, 0, 0, this. mWidth, this. mHeight, this. mControlPtr, 0 );
If (this. capDriverConnect (this. lwndC, 0 ))
{
ShowVideo. BITMAPINFO bitmapinfo1;
This. capPreviewRate (this. lwndC, 0x42 );
This. capPreview (this. lwndC, true );
Bitmapinfo1 = new showVideo. BITMAPINFO ();
Bitmapinfo1.bmiHeader. biSize = showVideo. SizeOf (bitmapinfo1.bmiHeader );
Bitmapinfo1.bmiHeader. biWidth = 320;
Bitmapinfo1.bmiHeader. biHeight = 240;
Bitmapinfo1.bmiHeader. biPlanes = 1;
Bitmapinfo1.bmiHeader. biBitCount = 0x18;
This. capSetVideoFormat (this. lwndC, ref bitmapinfo1, showVideo. SizeOf (bitmapinfo1 ));
ShowVideo. SetWindowPos (this. lwndC, 0, 0, 0, this. mWidth, this. mHeight, 6 );
}
}

// Fields
Private IntPtr lwndC;
Private IntPtr mControlPtr;
Private int mHeight;
Private int mWidth;
}
}

Form1.cs code:

Namespace webcam
{
Using System;
Using System. ComponentModel;
Using System. Drawing;
Using System. Windows. Forms;

Public class Form1: Form
{
// Methods
Public Form1 ()
{
This. components = null;
This. InitializeComponent ();
}

Private void B _stop_Click (object sender, EventArgs e)
{
This. B _play.Enabled = true;
This. B _stop.Enabled = false;
This. WC. closewebcam ();
}

Private void button#click (Object sender, eventargs E)
{
This. B _play.enabled = false;
This. B _stop.enabled = true;
This. panelpreview. size = new size (320,240 );
This. WC = new webcamera (this. panelpreview. Handle, this. panelpreview. Width, this. panelpreview. Height );
This. WC. startwebcam ();
}

Protected override void dispose (bool disposing)
{
If (disposing & (this. Components! = NULL ))
{
This. components. Dispose ();
}
Base. Dispose (disposing );
}

Private void Form1_Load (object sender, EventArgs e)
{
This. B _play.Enabled = false;
This. B _stop.Enabled = true;
This. panelPreview. Size = new Size (320,240 );
This. wc = new WebCamera (this. panelPreview. Handle, this. panelPreview. Width, this. panelPreview. Height );
This. wc. StartWebCam ();
}

Private void InitializeComponent ()
{
This. B _play = new System. Windows. Forms. Button ();
This. panelPreview = new System. Windows. Forms. Panel ();
This. B _stop = new System. Windows. Forms. Button ();
This. suspendlayout ();
//
// B _play
//
This. B _play.location = new system. Drawing. Point (83,264 );
This. B _play.name = "B _play ";
This. B _play.tabindex = 0;
This. B _play.text = "& Play ";
This. B _play.click + = new system. eventhandler (this. button#click );
//
// Panelpreview
//
This. panelpreview. Location = new system. Drawing. Point (0, 8 );
This. panelpreview. Name = "panelpreview ";
This. panelpreview. size = new system. Drawing. Size (320,240 );
This. panelPreview. TabIndex = 1;
//
// B _stop
//
This. B _stop.Enabled = false;
This. B _stop.Location = new System. Drawing. Point (163,264 );
This. B _stop.Name = "B _stop ";
This. B _stop.TabIndex = 2;
This. B _stop.Text = "& Stop ";
This. B _stop.Click + = new System. EventHandler (this. B _stop_Click );
//
// Form1
//
This. AutoScaleBaseSize = new System. Drawing. Size (6, 14 );
This. ClientSize = new System. Drawing. Size (320,310 );
This. Controls. Add (this. B _stop );
This. Controls. Add (this. panelpreview );
This. Controls. Add (this. B _play );
This. maximizebox = false;
This. minimizebox = false;
This. Name = "form1 ";
This. Text = "goodview test web camera ";
This. Load + = new system. eventhandler (this. form#load );
This. resumelayout (false );

}

[Stathread]
Private Static void main ()
{
Application. Run (New form1 ());
}

// Fields
Private button B _play;
Private Button B _stop;
Private Container components;
Private Panel panelPreview;
Private WebCamera wc;
}
}