Winform开发框架之通用Windows摄像头调用拍照--SNF快速开发平台3.3-Spring.Net.Framework
今天做了一个windows系统下调用摄像头、进行开启、关闭、拍照、设置等等功能演示。
进行源码贡献,欢迎大家下载使用
一、DEMO效果如下:
二、DEMO演示代码如下:
using SNF.Utilities; using SNF.WinForm; /// <summary> /// CameraDemo.cs /// Windows摄像头调用DEMO /// /// 修改记录 /// /// 2016.10.28 版本:1.0 WangJinDou 创建。 /// /// <author> /// <name>王金斗</name> /// <date>2016.10.28</date> /// </author> /// </summary> public partial class CameraDemo : BaseForm { public CameraDemo() { InitializeComponent(); } Camera WC; private void CameraDemo_Load(object sender, EventArgs e) { WC = new Camera(this.panelPreview.Handle, this.panelPreview.Width, this.panelPreview.Height); } //打开摄像头 private void btnOpen_Click(object sender, EventArgs e) { WC.StartWebCam(); } //关闭摄像头 private void btnClose_Click(object sender, EventArgs e) { WC.CloseWebCam(); } //拍照 private void btnPicture_Click(object sender, EventArgs e) { string path = FileDialogHelper.OpenDir(); if (!string.IsNullOrEmpty(path)) { WC.GrabImage(path + "/" + DateTime.Now.ToString("yyyy-MM-dd") + ".jpg"); } } //抓图到剪切板 private void btnPictureClip_Click(object sender, EventArgs e) { WC.GrabImageToClipBoard(); } /// <summary> /// 弹出视频格式设置对话框 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void btnSetCaptureFormat_Click(object sender, EventArgs e) { WC.SetCaptureFormat(); } //弹出色彩设置对话框 private void btnSetCaptureSource_Click(object sender, EventArgs e) { WC.SetCaptureSource(); } }
三、具体类源码
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 | //----------------------------------------------------------------- // All Rights Reserved , Copyright (C) 2015 , Spring TECH, Ltd. //----------------------------------------------------------------- using System; using System.Collections.Generic; using System.Text; using System.Runtime.InteropServices; namespace SNF.Utilities { /// <summary> /// Camera /// 摄像头操作辅助类,包括开启、关闭、抓图、设置等功能 /// <author> /// <name>WangJinDou</name> /// <date>2014-02-05</date> /// </author> /// </summary> public class Camera { private IntPtr lwndC; private IntPtr mControlPtr; private int mWidth; private int mHeight; // 构造函数 public Camera(IntPtr handle, int width, int height) { mControlPtr = handle; mWidth = width; mHeight = height; } // 帧回调的委托 public delegate void RecievedFrameEventHandler( byte [] data); public event RecievedFrameEventHandler RecievedFrame; private AviCapture.FrameEventHandler mFrameEventHandler; /// <summary> /// 关闭摄像头 /// </summary> public void CloseWebCam() { this .capDriverDisconnect( this .lwndC); } /// <summary> /// 开启摄像头 /// </summary> public void StartWebCam() { byte [] lpszName = new byte [100]; byte [] lpszVer = new byte [100]; AviCapture.capGetDriverDescriptionA(1, lpszName, 100, lpszVer, 100); this .lwndC = AviCapture.capCreateCaptureWindowA(lpszName, AviCapture.WS_VISIBLE + AviCapture.WS_CHILD, 0, 0, mWidth, mHeight, mControlPtr, 0); if ( this .capDriverConnect( this .lwndC, 0)) { this .capPreviewRate( this .lwndC, 66); this .capPreview( this .lwndC, true ); this .capOverlay( this .lwndC, true ); AviCapture.BITMAPINFO bitmapinfo = new AviCapture.BITMAPINFO(); bitmapinfo.bmiHeader.biSize = AviCapture.SizeOf(bitmapinfo.bmiHeader); bitmapinfo.bmiHeader.biWidth = this .mWidth; bitmapinfo.bmiHeader.biHeight = this .mHeight; bitmapinfo.bmiHeader.biPlanes = 1; bitmapinfo.bmiHeader.biBitCount = 24; this .capSetVideoFormat( this .lwndC, ref bitmapinfo, AviCapture.SizeOf(bitmapinfo)); this .mFrameEventHandler = new AviCapture.FrameEventHandler(FrameCallBack); this .capSetCallbackOnFrame( this .lwndC, this .mFrameEventHandler); AviCapture.SetWindowPos( this .lwndC, 0, 0, 0, mWidth, mHeight, 6); } } /// <summary> /// 抓图到文件 /// </summary> /// <param name="path"></param> public void GrabImage( string path) { IntPtr hBmp = Marshal.StringToHGlobalAnsi(path); AviCapture.SendMessage(lwndC, AviCapture.WM_CAP_SAVEDIB, 0, hBmp.ToInt32()); } /// <summary> /// 抓图到剪切板 /// </summary> /// <returns></returns> public bool GrabImageToClipBoard() { return AviCapture.SendMessage(lwndC, AviCapture.WM_CAP_EDIT_COPY, 0, 0); } /// <summary> /// 弹出色彩设置对话框 /// </summary> public void SetCaptureSource() { AviCapture.CAPDRIVERCAPS caps = new AviCapture.CAPDRIVERCAPS(); AviCapture.SendMessage(lwndC, AviCapture.WM_CAP_GET_CAPS, AviCapture.SizeOf(caps), ref caps); if (caps.fHasDlgVideoSource) { AviCapture.SendMessage(lwndC, AviCapture.WM_CAP_DLG_VIDEOSOURCE, 0, 0); } } /// <summary> /// 弹出视频格式设置对话框 /// </summary> public void SetCaptureFormat() { AviCapture.CAPDRIVERCAPS caps = new AviCapture.CAPDRIVERCAPS(); AviCapture.SendMessage(lwndC, AviCapture.WM_CAP_GET_CAPS, AviCapture.SizeOf(caps), ref caps); if (caps.fHasDlgVideoSource) { AviCapture.SendMessage(lwndC, AviCapture.WM_CAP_DLG_VIDEOFORMAT, 0, 0); } } #region 以下为私有函数 private bool capDriverConnect(IntPtr lwnd, short i) { return AviCapture.SendMessage(lwnd, AviCapture.WM_CAP_DRIVER_CONNECT, i, 0); } private bool capDriverDisconnect(IntPtr lwnd) { return AviCapture.SendMessage(lwnd, AviCapture.WM_CAP_DRIVER_DISCONNECT, 0, 0); } private bool capPreview(IntPtr lwnd, bool f) { return AviCapture.SendMessage(lwnd, AviCapture.WM_CAP_SET_PREVIEW, f, 0); } private bool capPreviewRate(IntPtr lwnd, short wMS) { return AviCapture.SendMessage(lwnd, AviCapture.WM_CAP_SET_PREVIEWRATE, wMS, 0); } private bool capSetCallbackOnFrame(IntPtr lwnd, AviCapture.FrameEventHandler lpProc) { return AviCapture.SendMessage(lwnd, AviCapture.WM_CAP_SET_CALLBACK_FRAME, 0, lpProc); } private bool capSetVideoFormat(IntPtr hCapWnd, ref AviCapture.BITMAPINFO BmpFormat, int CapFormatSize) { return AviCapture.SendMessage(hCapWnd, AviCapture.WM_CAP_SET_VIDEOFORMAT, CapFormatSize, ref BmpFormat); } private void FrameCallBack(IntPtr lwnd, IntPtr lpVHdr) { AviCapture.VIDEOHDR videoHeader = new AviCapture.VIDEOHDR(); byte [] VideoData; videoHeader = (AviCapture.VIDEOHDR)AviCapture.GetStructure(lpVHdr, videoHeader); VideoData = new byte [videoHeader.dwBytesUsed]; AviCapture.Copy(videoHeader.lpData, VideoData); if ( this .RecievedFrame != null ) this .RecievedFrame(VideoData); } private bool capOverlay(IntPtr lwnd, bool f) { return AviCapture.SendMessage(lwnd, AviCapture.WM_CAP_SET_OVERLAY, f, 0); } #endregion } /// <summary> /// 视频辅助类 /// </summary> internal class AviCapture { //通过调用acicap32.dll进行读取摄像头数据 [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 bool SendMessage(IntPtr hWnd, int wMsg, int wParam, ref CAPDRIVERCAPS 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); //部分常量 public const int WM_USER = 0x400; public const int WS_CHILD = 0x40000000; public const int WS_VISIBLE = 0x10000000; public const int SWP_NOMOVE = 0x2; public const int SWP_NOZORDER = 0x4; public const int WM_CAP_DRIVER_CONNECT = WM_USER + 10; public const int WM_CAP_DRIVER_DISCONNECT = WM_USER + 11; public const int WM_CAP_SET_CALLBACK_FRAME = WM_USER + 5; public const int WM_CAP_SET_PREVIEW = WM_USER + 50; public const int WM_CAP_SET_PREVIEWRATE = WM_USER + 52; public const int WM_CAP_SET_VIDEOFORMAT = WM_USER + 45; public const int WM_CAP_SAVEDIB = WM_USER + 25; public const int WM_CAP_SET_OVERLAY = WM_USER + 51; public const int WM_CAP_GET_CAPS = WM_USER + 14; public const int WM_CAP_DLG_VIDEOFORMAT = WM_USER + 41; public const int WM_CAP_DLG_VIDEOSOURCE = WM_USER + 42; public const int WM_CAP_DLG_VIDEODISPLAY = WM_USER + 43; public const int WM_CAP_EDIT_COPY = WM_USER + 30; public const int WM_CAP_SET_SEQUENCE_SETUP = WM_USER + 64; public const int WM_CAP_GET_SEQUENCE_SETUP = WM_USER + 65; // 结构 [StructLayout(LayoutKind.Sequential)] //VideoHdr 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)] //BitmapInfoHeader 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)] //BitmapInfo public struct BITMAPINFO { [MarshalAs(UnmanagedType.Struct, SizeConst = 40)] public BITMAPINFOHEADER bmiHeader; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 1024)] public Int32[] bmiColors; } [StructLayout(LayoutKind.Sequential)] public struct CAPDRIVERCAPS { [MarshalAs(UnmanagedType.U2)] public UInt16 wDeviceIndex; [MarshalAs(UnmanagedType.Bool)] public bool fHasOverlay; [MarshalAs(UnmanagedType.Bool)] public bool fHasDlgVideoSource; [MarshalAs(UnmanagedType.Bool)] public bool fHasDlgVideoFormat; [MarshalAs(UnmanagedType.Bool)] public bool fHasDlgVideoDisplay; [MarshalAs(UnmanagedType.Bool)] public bool fCaptureInitialized; [MarshalAs(UnmanagedType.Bool)] public bool fDriverSuppliesPalettes; [MarshalAs(UnmanagedType.I4)] public int hVideoIn; [MarshalAs(UnmanagedType.I4)] public int hVideoOut; [MarshalAs(UnmanagedType.I4)] public int hVideoExtIn; [MarshalAs(UnmanagedType.I4)] public int hVideoExtOut; } public delegate void FrameEventHandler(IntPtr lwnd, IntPtr lpVHdr); // 公共函数 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); } } } |
作者: 王春天 2015-10-28
作者Blog:http://www.cnblogs.com/spring_wang 出处: http://www.cnblogs.com/spring_wang/p/4874584.html
如果觉得还不错,欢迎转载。
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作者: 王春天 出处: http://www.cnblogs.com/spring_wang/ Email: spring_best@yeah.net QQ交流:903639067
QQ群:322581894 关于作者: 大连天翼信息科技有限公司 技术总监。 SNF快速开发平台 创始人。应用平台架构师、IT规划咨询专家、业务流程设计专家。 专注于快速开发平台的开发、代码生成器。同时专注于微软平台项目架构、管理和企业解决方案,多年项目开发与管理经验,精通DotNet系列技术Vue、.NetCore、MVC、Webapi、C#、WinForm等,DB(SqlServer、Oracle等)技术,移动端开发。熟悉Java、VB及PB开发语言。在面向对象、面向服务以及数据库领域有一定的造诣。现从事项目实施、开发、架构等工作。并从事用友软件产品U8、U9、PLM 客开工作。 如有问题或建议,请多多赐教! 本文版权归作者和CNBLOGS博客共有,欢迎转载,但未经作者同意必须保留此段声明,且在文章页面明显位置给出原文连接,如有问题,可以通过邮箱或QQ 联系我,非常感谢。
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