/// <summary>
/// 从视频数据放回一个Bmp
/// </summary>
/// <param name="data"></param>
/// <param name="width"></param>
/// <param name="height"></param>
/// <returns></returns>
//public static Bitmap GetBitmapFromCallBackData(byte[] data, int width, int height)
//{
// Bitmap bit = new Bitmap(width, height, PixelFormat.Format24bppRgb);
// BitmapData bitdata = bit.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
// unsafe
// {
// byte* p = (byte*)(void*)bitdata.Scan0;
// for (int i = 0; i < bit.Height; i++)
// {
// for (int k = 0; k < bitdata.Stride; k++)
// {
// int index = (bit.Height - (i + 1)) * bitdata.Stride + k;
// p[0] = data[index];
// p++;
// }
// }
// }
// bit.UnlockBits(bitdata);
// return bit;
//}
// start the web camera
public void StartWebCam()
{
byte[] lpszName = new byte[100];
byte[] lpszVer = new byte[100];
ShowVideo.capGetDriverDescriptionA(0, lpszName, 100, lpszVer, 100);
this.lwndC = ShowVideo.capCreateCaptureWindowA(lpszName, ShowVideo.WS_CHILD | ShowVideo.WS_VISIBLE, 0, 0, mWidth, mHeight, this.mControlPtr, 0);
if (this.capDriverConnect(this.lwndC, 0))
{
//有这句，图像才会和mWidth, mHeight相适应
ShowVideo.SendMessage(this.lwndC, ShowVideo.WM_CAP_SET_SCALE, 1, 0);
this.capPreviewRate(this.lwndC, 66);
this.capPreview(this.lwndC, true);
//ShowVideo.BITMAPINFO bitmapinfo = new ShowVideo.BITMAPINFO();
//bitmapinfo.bmiHeader.biSize = ShowVideo.SizeOf(bitmapinfo.bmiHeader);
//bitmapinfo.bmiHeader.biWidth = 353;
//bitmapinfo.bmiHeader.biHeight = 288;
//bitmapinfo.bmiHeader.biPlanes = 1;
//bitmapinfo.bmiHeader.biBitCount = 24;
//设置格式不一定成功，看设备是否支持
//this.capSetVideoFormat(this.lwndC, ref bitmapinfo, ShowVideo.SizeOf(bitmapinfo));
this.mFrameEventHandler = new ShowVideo.FrameEventHandler(FrameCallBack);
this.capSetCallbackOnFrame(this.lwndC, this.mFrameEventHandler);
ShowVideo.SetWindowPos(this.lwndC, 0, 0, 0, mWidth, mHeight, 6);
//ShowVideo.SendMessage(this.lwndC, ShowVideo.WM_CAP_GET_VIDEOFORMAT, ShowVideo.SizeOf(bitmapinfo), ref bitmapinfo);
}
}
/// <summary>
/// 录像,保存avi文件的路径
/// </summary>
/// <param name="lwnd"></param>
/// <param name="path"></param>
public void CapScope(IntPtr lwnd, string path)
{
IntPtr hBmp = Marshal.StringToHGlobalAnsi(path);
ShowVideo.SendMessage(lwnd, ShowVideo.WM_CAP_FILE_SET_CAPTURE_FILEA, 0, hBmp.ToInt32());
ShowVideo.SendMessage(lwnd, ShowVideo.WM_CAP_SEQUENCE, 0, 0);
}
/// <summary>
/// 抓图
/// </summary>
/// <param name="path"></param>
public void CapImage(string path)
{
ShowVideo.BITMAPINFO bitmapinfo = new ShowVideo.BITMAPINFO();
IntPtr hBmp = Marshal.StringToHGlobalAnsi(path);
ShowVideo.SendMessage(this.lwndC, ShowVideo.WM_CAP_SAVEDIB, 0, hBmp.ToInt32());
}
private bool capPreviewRate(IntPtr lwnd, short wMS)
{
//
bool s = ShowVideo.SendMessage(lwnd, ShowVideo.WM_CAP_SET_PREVIEWRATE, wMS, 0);
//ShowVideo.SendMessage(lwnd, ShowVideo.WM_CAP_SET_OVERLAY, 1, 0);
return(s);
}
private void FrameCallBack(IntPtr lwnd, IntPtr lpVHdr)
{
if (this.RecievedFrame != null)
{
ShowVideo.VIDEOHDR videoHeader = new ShowVideo.VIDEOHDR();
byte[] VideoData;
videoHeader = (ShowVideo.VIDEOHDR)ShowVideo.GetStructure(lpVHdr, videoHeader);
VideoData = new byte[videoHeader.dwBytesUsed];
ShowVideo.Copy(videoHeader.lpData, VideoData);
IntPtr hdc = API.CreateCompatibleDC(0);
API.BITMAPINFO bitheder = new API.BITMAPINFO();
ShowVideo.SendMessage(this.lwndC, ShowVideo.WM_CAP_GET_VIDEOFORMAT, ShowVideo.SizeOf(bitheder), ref bitheder);
API.BITMAPINFOHEADER hhh = bitheder.bmiHeader;
API.BITMAPINFO bitinfo = new API.BITMAPINFO();
IntPtr ht = API.CreateDIBSection(IntPtr.Zero, bitheder, API.DIB_RGB_COLORS, videoHeader.lpData, 0, 0);
this.RecievedFrame(this, VideoData);
}
}
/// <summary>
/// 显示压缩设置
/// </summary>
public void ShowCompressionSetting()
{
ShowVideo.SendMessage(this.lwndC, ShowVideo.WM_CAP_DLG_VIDEOCOMPRESSION, 0, 0);
}
/// <summary>
/// 显示图像格式设置窗口
/// </summary>
public void ShowImageFormatSetting()
{
ShowVideo.SendMessage(this.lwndC, ShowVideo.WM_CAP_DLG_VIDEOFORMAT, 0, 0);
}
private bool capSetVideoFormat(IntPtr hCapWnd, ref ShowVideo.BITMAPINFO BmpFormat, int CapFormatSize)
{
return(ShowVideo.SendMessage(hCapWnd, ShowVideo.WM_CAP_SET_VIDEOFORMAT, CapFormatSize, ref BmpFormat));
}
private bool capSetCallbackOnFrame(IntPtr lwnd, ShowVideo.FrameEventHandler lpProc)
{
return(ShowVideo.SendMessage(lwnd, ShowVideo.WM_CAP_SET_CALLBACK_FRAME, 0, lpProc));
}
private bool capPreview(IntPtr lwnd, bool f)
{
return(ShowVideo.SendMessage(lwnd, ShowVideo.WM_CAP_SET_PREVIEW, f, 0));
}
private bool capDriverDisconnect(IntPtr lwnd)
{
return(ShowVideo.SendMessage(lwnd, ShowVideo.WM_CAP_DRIVER_DISCONNECT, 0, 0));
}
// private functions
private bool capDriverConnect(IntPtr lwnd, short i)
{
return(ShowVideo.SendMessage(lwnd, ShowVideo.WM_CAP_DRIVER_CONNECT, i, 0));
}
/// <summary>
/// 摄像头设置
/// </summary>
public void ShowSelectCameraOption()
{
ShowVideo.SendMessage(this.lwndC, ShowVideo.WM_CAP_DLG_VIDEOSOURCE, 0, 0);
}
/// <summary>
/// 获取摄像头实际图像大小
/// </summary>
/// <returns></returns>
public Size GetVideoSize()
{
ShowVideo.CAPSTATUS status = new ShowVideo.CAPSTATUS();
ShowVideo.SendMessage(this.lwndC, ShowVideo.WM_CAP_GET_STATUS, ShowVideo.SizeOf(status), ref status);
return(new Size(status.uiImageWidth, status.uiImageHeight));
}