using System;
using System.Runtime.InteropServices;
using System.Drawing.Imaging;
using System.Windows.Forms;
using System.Drawing;
namespace CMEAClient
{
/// <summary>
/// Class1 的摘要说明。
/// </summary>
public class video
{
//5个传入参数
private IntPtr myHand;
private int myWidth;
private short myHeight;
private int myLeft;
private int myTop;
//调用avicap32.dll
public struct videohdr_tag
{
public byte[] lpData;
public int dwBufferLength;
public int dwBytesUsed;
public int dwTimeCaptured;
public int dwUser;
public int dwFlags;
public int[] dwReserved;
}
[DllImport("avicap32.dll", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
public static extern int capCreateCaptureWindowA([MarshalAs(UnmanagedType.VBByRefStr)] ref string lpszWindowName, int dwStyle, int x, int y, int nWidth, short nHeight, int hWndParent, int nID);
[DllImport("avicap32.dll", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
public static extern bool capGetDriverDescriptionA(short wDriver, [MarshalAs(UnmanagedType.VBByRefStr)] ref string lpszName, int cbName, [MarshalAs(UnmanagedType.VBByRefStr)] ref string lpszVer, int cbVer);
[DllImport("user32", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
public static extern bool DestroyWindow(int hndw);
[DllImport("user32", EntryPoint = "SendMessageA", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
public static extern int SendMessage(int hwnd, int wMsg, int wParam, [MarshalAs(UnmanagedType.AsAny)] object lParam);
[DllImport("user32", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
public static extern int SetWindowPos(int hwnd, int hWndInsertAfter, int x, int y, int cx, int cy, int wFlags);
[DllImport("vfw32.dll")]
public static extern string capVideoStreamCallback(int hwnd, videohdr_tag videohdr_tag);
[DllImport("vicap32.dll", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
public static extern bool capSetCallbackOnFrame(int hwnd, string s);
//自定义参数：
private int hHwnd;
//构造函数
public video(IntPtr myPtr, int left, int top, int width, short height)
{
myHand = myPtr;
myLeft = left;
myTop = top;
myWidth = width;
myHeight = height;
//
// TODO: 在此处添加构造函数逻辑
//
}
//打开视频：
public void opVideo()
{
int intDevice = 0;
string refDevice = intDevice.ToString();
hHwnd = capCreateCaptureWindowA(ref refDevice, 1342177280, 0, 0, 640, 480, myHand.ToInt32(), 0);
if (SendMessage(hHwnd, 0x40a, intDevice, 0) > 0)
{
SendMessage(this.hHwnd, 0x435, -1, 0);
SendMessage(this.hHwnd, 0x434, 0x42, 0);
SendMessage(this.hHwnd, 0x432, -1, 0);
SetWindowPos(this.hHwnd, 1, 0, 0, myWidth, Convert.ToInt32(myHeight), 6);
}
else
{
DestroyWindow(this.hHwnd);
}
}
//停止视频
public void CloVideo()
{
SendMessage(this.hHwnd, 0x40b, 0, 0);
DestroyWindow(this.hHwnd);
}
//捕获视频
public Image CatchVideo()
{
SendMessage(this.hHwnd, 0x41e, 0, 0);
IDataObject obj1 = Clipboard.GetDataObject();
Image getIma = null;
if (obj1.GetDataPresent(typeof(Bitmap)))
{
Image image1 = (Image)obj1.GetData(typeof(Bitmap));
getIma = image1;
}
return getIma;
}
}
}
