using System; using System.IO; using System.Drawing.Imaging; using System.Runtime.InteropServices; using System.Drawing; using System.Collections; using System.Data; namespace SoundVideo { public class Camera { public delegate void RecievedFrameEventHandler(byte[] data); public event RecievedFrameEventHandler RecievedFrame; public IntPtr lwndC; private IntPtr mControlPtr; private int mWidth; private int mHeight;
private showVideo.FrameEventHandler mFrameEventHandler; public Camera(IntPtr handle, int width, int height) { mControlPtr = handle; mWidth = width; mHeight = height; } public void CloseCamera() { this.capDriverDisconnect(this.lwndC); } public void StartCamera(int width ,int height) { try { byte[] lpszName = new byte[100]; byte[] lpszVer = new byte[100]; showVideo.capGetDriverDescriptionA(0, lpszName, 100, lpszVer, 100); this.lwndC = showVideo.capCreateCaptureWindowA(lpszName, showVideo.WS_VISIBLE + showVideo.WS_CHILD, 0, 0, mWidth, mHeight, mControlPtr, 0); if (this.capDriverConnect(this.lwndC, 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 = width;//352; bitmapinfo.bmiHeader.biHeight = height;// 288; bitmapinfo.bmiHeader.biPlanes = 1; bitmapinfo.bmiHeader.biBitCount = 24; 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); } } catch { throw; } } public void bitMapToJPG(string bmpFileName, string jpgFileName) { System.Drawing.Image img; img = ReturnPhoto(bmpFileName); img.Save(jpgFileName, ImageFormat.Jpeg); } private Image ReturnPhoto(string bmpFileName) { try { System.IO.FileStream stream; stream = File.OpenRead(bmpFileName); Bitmap bmp = new Bitmap(stream); System.Drawing.Image image = bmp;//得到原图 //创建指定大小的图 System.Drawing.Image newImage = image.GetThumbnailImage(bmp.Width, bmp.Height, null, new IntPtr()); Graphics g = Graphics.FromImage(newImage); g.DrawImage(newImage, 0, 0, newImage.Width, newImage.Height); //将原图画到指定的图上 g.Dispose(); stream.Close(); return newImage; } catch { throw; } } public void capImage(IntPtr lwnd, string path)//抓图 { showVideo.BITMAPINFO bitmapinfo = new showVideo.BITMAPINFO(); IntPtr hBmp = Marshal.StringToHGlobalAnsi(path); showVideo.SendMessage(lwnd, showVideo.WM_CAP_SAVEDIB, 0, hBmp.ToInt32()); } public void capScope(IntPtr lwnd, string path)// 录像,保存avi文件的路径 { 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); } public void stopCapScope(IntPtr lwnd)// 停止录像 { showVideo.SendMessage(lwnd, showVideo.WM_CAP_STOP, 0, 0); } private bool capDriverConnect(IntPtr lwnd, short i) { return showVideo.SendMessage(lwnd, showVideo.WM_CAP_DRIVER_CONNECT, i, 0); } private bool capDriverDisconnect(IntPtr lwnd) { return showVideo.SendMessage(lwnd, showVideo.WM_CAP_DRIVER_DISCONNECT, 0, 0); } private bool capPreview(IntPtr lwnd, bool f) { return showVideo.SendMessage(lwnd, showVideo.WM_CAP_SET_PREVIEW, f, 0); } private bool capPreviewRate(IntPtr lwnd, short wMS) { return showVideo.SendMessage(lwnd, showVideo.WM_CAP_SET_PREVIEWRATE, wMS, 0); } private bool capSetCallbackOnFrame(IntPtr lwnd, showVideo.FrameEventHandler lpProc) { return showVideo.SendMessage(lwnd, showVideo.WM_CAP_SET_CALLBACK_FRAME, 0, lpProc); } private bool capSetVideoFormat(IntPtr hCapWnd, ref showVideo.BITMAPINFO BmpFormat, int CapFormatSize) { return showVideo.SendMessage(hCapWnd, showVideo.WM_CAP_SET_VIDEOFORMAT, CapFormatSize, ref BmpFormat); } private void FrameCallBack(IntPtr lwnd, IntPtr lpVHdr) { try { 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); if (this.RecievedFrame != null) this.RecievedFrame(VideoData); } catch { throw; } } }
public class showVideo { [DllImport("avicap32.dll")] public static extern IntPtr capCreateCaptureWindowA(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("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, short wParam, FrameEventHandler 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); [DllImport("avicap32.dll")] public static extern int capGetVideoFormat(IntPtr hWnd, IntPtr psVideoFormat, int wSize);
public const int WM_USER = 0x400; public const int WS_CHILD = 0x40000000; public const int WS_VISIBLE = 0x10000000; public const int WM_CAP_START = WM_USER; public const int WM_CAP_STOP = WM_CAP_START + 68; public const int WM_CAP_DRIVER_CONNECT = WM_CAP_START + 10; public const int WM_CAP_DRIVER_DISCONNECT = WM_CAP_START + 11; public const int WM_CAP_SAVEDIB = WM_CAP_START + 25; public const int WM_CAP_GRAB_FRAME = WM_CAP_START + 60; public const int WM_CAP_SEQUENCE = WM_CAP_START + 62; public const int WM_CAP_FILE_SET_CAPTURE_FILEA = WM_CAP_START + 20; public const int WM_CAP_SEQUENCE_NOFILE = WM_CAP_START + 63; public const int WM_CAP_SET_OVERLAY = WM_CAP_START + 51; public const int WM_CAP_SET_PREVIEW = WM_CAP_START + 50; public const int WM_CAP_SET_CALLBACK_VIDEOSTREAM = WM_CAP_START + 6; public const int WM_CAP_SET_CALLBACK_ERROR = WM_CAP_START + 2; public const int WM_CAP_SET_CALLBACK_STATUSA = WM_CAP_START + 3; public const int WM_CAP_SET_CALLBACK_FRAME = WM_CAP_START + 5; public const int WM_CAP_SET_SCALE = WM_CAP_START + 53; public const int WM_CAP_SET_PREVIEWRATE = WM_CAP_START + 52; public const int WM_CAP_SET_VIDEOFORMAT = WM_USER + 45;
[StructLayout(LayoutKind.Sequential)] public struct VIDEOHDR { [MarshalAs(UnmanagedType.I4)] public int lpData; [MarshalAs(UnmanagedType.I4)] public int dwBufferLength; [MarshalAs(UnmanagedType.I4)] public int dwBytesUsed; [MarshalAs(UnmanagedType.I4)] public int dwTimeCaptured; [MarshalAs(UnmanagedType.I4)] public int dwUser; [MarshalAs(UnmanagedType.I4)] public int dwFlags; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 4)] public int[] dwReserved; }
[StructLayout(LayoutKind.Sequential)] public struct BITMAPINFOHEADER { [MarshalAs(UnmanagedType.I4)] public Int32 biSize; [MarshalAs(UnmanagedType.I4)] public Int32 biWidth; [MarshalAs(UnmanagedType.I4)] public Int32 biHeight; [MarshalAs(UnmanagedType.I2)] public short biPlanes; [MarshalAs(UnmanagedType.I2)] public short biBitCount; [MarshalAs(UnmanagedType.I4)] public Int32 biCompression; [MarshalAs(UnmanagedType.I4)] public Int32 biSizeImage; [MarshalAs(UnmanagedType.I4)] public Int32 biXPelsPerMeter; [MarshalAs(UnmanagedType.I4)] public Int32 biYPelsPerMeter; [MarshalAs(UnmanagedType.I4)] public Int32 biClrUsed; [MarshalAs(UnmanagedType.I4)] public Int32 biClrImportant; }
[StructLayout(LayoutKind.Sequential)] public struct BITMAPINFO { [MarshalAs(UnmanagedType.Struct, SizeConst = 40)] public BITMAPINFOHEADER bmiHeader; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 1024)] public Int32[] bmiColors; }
public delegate void FrameEventHandler(IntPtr lwnd, IntPtr lpVHdr);
public static object GetStructure(IntPtr ptr, ValueType structure) { return Marshal.PtrToStructure(ptr, structure.GetType()); }
public static object GetStructure(int ptr, ValueType structure) { return GetStructure(new IntPtr(ptr), structure); }
public static void Copy(IntPtr ptr, byte[] data) { Marshal.Copy(ptr, data, 0, data.Length); }
public static void Copy(int ptr, byte[] data) { Copy(new IntPtr(ptr), data); }
public static int SizeOf(object structure) { return Marshal.SizeOf(structure); } } }
