C# 编写免驱动摄像头监控程式
2009-08-18 09:02
控制摄像头的类
using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using System.Drawing;
using System.Drawing.Imaging;
namespace Camera
{
///
/// 一个控制摄像头的类
///
public class PCCamera
{
private const int WM_USER = 0x400;
private const int WS_CHILD = 0x40000000;
private const int WS_VISIBLE = 0x10000000;
private const int WM_CAP_START = WM_USER;
private const int WM_CAP_STOP = WM_CAP_START + 68;
private const int WM_CAP_DRIVER_CONNECT = WM_CAP_START + 10;
private const int WM_CAP_DRIVER_DISCONNECT = WM_CAP_START + 11;
private const int WM_CAP_SAVEDIB = WM_CAP_START + 25;
private const int WM_CAP_GRAB_FRAME = WM_CAP_START + 60;
private const int WM_CAP_SEQUENCE = WM_CAP_START + 62;
private const int WM_CAP_FILE_SET_CAPTURE_FILEA = WM_CAP_START + 20;
private const int WM_CAP_SEQUENCE_NOFILE = WM_CAP_START + 63;
private const int WM_CAP_SET_OVERLAY = WM_CAP_START + 51;
private const int WM_CAP_SET_PREVIEW = WM_CAP_START + 50;
private const int WM_CAP_SET_CALLBACK_VIDEOSTREAM = WM_CAP_START + 6;
private const int WM_CAP_SET_CALLBACK_ERROR = WM_CAP_START + 2;
private const int WM_CAP_SET_CALLBACK_STATUSA = WM_CAP_START + 3;
private const int WM_CAP_SET_CALLBACK_FRAME = WM_CAP_START + 5;
private const int WM_CAP_SET_SCALE = WM_CAP_START + 53;
private const int WM_CAP_SET_PREVIEWRATE = WM_CAP_START + 52;
private IntPtr hWndC;
private bool bWorkStart = false;
private IntPtr mControlPtr;
private int mWidth;
private int mHeight;
private int mLeft;
private int mTop;
///
/// 初始化显示图像
///
///
控件的句柄
///
开始显示的左边距
///
开始显示的上边距
///
要显示的宽度
///
要显示的长度
public PCCamera(IntPtr handle, int left, int top, int width, int height) //PCCamera
{= handle;
mWidth = width;
mHeight = height;
mLeft = left;
mTop = top;
}
[DllImport("avicap32.dll")]
private static extern IntPtr capCreateCaptureWindowA(byte[] lpszWindowName, int dwStyle, int x, int y, int nWidth, int nHeight, IntPtr hWndParent, int nID);
[DllImport("avicap32.dll")]
private static extern int capGetVideoFormat(IntPtr hWnd, IntPtr psVideoFormat, int wSize);
[DllImport("User32.dll")]
private static extern bool SendMessage(IntPtr hWnd, int wMsg, IntPtr wParam, IntPtr lParam);
///
/// 开始显示图像
///
public void Start()
{
if (bWorkStart)
return;
bWorkStart = true;
byte[] lpszName = new byte[100];
hWndC = capCreateCaptureWindowA(lpszName, WS_CHILD | WS_VISIBLE, mLeft, mTop, mWidth, mHeight, mControlPtr, 0);
if (hWndC.ToInt32() != 0)
{
SendMessage(hWndC, WM_CAP_SET_CALLBACK_VIDEOSTREAM, IntPtr.Zero, IntPtr.Zero);
SendMessage(hWndC, WM_CAP_SET_CALLBACK_ERROR, IntPtr.Zero, IntPtr.Zero);
SendMessage(hWndC, WM_CAP_SET_CALLBACK_STATUSA, IntPtr.Zero, IntPtr.Zero);
SendMessage(hWndC, WM_CAP_DRIVER_CONNECT, IntPtr.Zero, IntPtr.Zero);
SendMessage(hWndC, WM_CAP_SET_SCALE, (IntPtr) 1, IntPtr.Zero);
SendMessage(hWndC, WM_CAP_SET_PREVIEWRATE, (IntPtr)66, IntPtr.Zero);
SendMessage(hWndC, WM_CAP_SET_OVERLAY, (IntPtr)1, IntPtr.Zero);
SendMessage(hWndC, WM_CAP_SET_PREVIEW, (IntPtr)1, IntPtr.Zero);
}
return;
}
///
/// 停止显示图像
///
public void Stop()
{
SendMessage(hWndC, WM_CAP_DRIVER_DISCONNECT, IntPtr.Zero, IntPtr.Zero);
bWorkStart = false;
}
///
/// 抓图
///
///
要保存bmp文件的路径
public void GrabImage(string path)
{
IntPtr hBmp = Marshal.StringToHGlobalAnsi(path);
SendMessage(hWndC, WM_CAP_SAVEDIB, IntPtr.Zero , hBmp);
}
///
///录像
///
///
要保存avi文件的路径
public void Kinescope(string path)
{
IntPtr hBmp = Marshal.StringToHGlobalAnsi(path);
SendMessage(hWndC, WM_CAP_FILE_SET_CAPTURE_FILEA, IntPtr.Zero,hBmp );
SendMessage(hWndC, WM_CAP_SEQUENCE, IntPtr.Zero,IntPtr.Zero );
}
///
///停止录像
///
public void StopKinescope()
{
SendMessage(hWndC, WM_CAP_STOP, IntPtr.Zero, IntPtr.Zero);
}
}
}
mControlPtr
==========================================================================
操作摄像头的代码
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace Temp
{
public partial class Form2 : Form
{
public Form2()
{
InitializeComponent();
pcc = new Camera.PCCamera(this.panelCamera.Handle, 0, 0, 320, 240); //panelCamera is Control panel
}
private Camera.PCCamera pcc;
//开始
private void btnStart_Click(object sender, EventArgs e)
{
pcc.Start();
}
//停止
private void btnStop_Click(object sender, EventArgs e)
{
pcc.Stop();
}
//截图
private void btnSaveImage_Click(object sender, EventArgs e)
{
pcc.GrabImage("c:\\" + System.DateTime.Now.ToString("yyyyMMddHHmmss") + ".jpg");
}
//录像
private void btnKinescope_Click(object sender, EventArgs e)
{
pcc.Kinescope("c:\\" + System.DateTime.Now.ToString("yyyyMMddHHmmss") + ".avi");
}
//停止录像
private void btnStopKinescope_Click(object sender, EventArgs e)
{
Application.DoEvents();
pcc.StopKinescope();
}
}
}
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