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
//-----------------------------------------------------------------
// 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。
