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; ////// CameraDemo.cs /// Windows摄像头调用DEMO /// /// 修改记录 /// /// 2016.10.28 版本：1.0 WangJinDou 创建。 /// /// 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(); } ////// ///王金斗 ///2016.10.28 ////// 弹出视频格式设置对话框 /// /// /// 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
//-----------------------------------------------------------------// 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{ /// /// Camera /// 摄像头操作辅助类，包括开启、关闭、抓图、设置等功能 /// /// WangJinDou /// 2014-02-05 /// /// 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; /// /// 关闭摄像头 /// public void CloseWebCam() { this.capDriverDisconnect(this.lwndC); } /// /// 开启摄像头 /// 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); } } /// /// 抓图到文件 /// /// public void GrabImage(string path) { IntPtr hBmp = Marshal.StringToHGlobalAnsi(path); AviCapture.SendMessage(lwndC, AviCapture.WM_CAP_SAVEDIB, 0, hBmp.ToInt32()); } /// /// 抓图到剪切板 /// /// /// 弹出色彩设置对话框 /// 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); } } /// /// 弹出视频格式设置对话框 /// 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 } /// /// 视频辅助类 /// 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:出处：
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