基本信息
源码名称：C# 开启、关闭摄像头视频(window API)
源码大小：0.03M
文件格式：.7z
开发语言：C#
更新时间：2019-06-01
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源码介绍
API摄像头视频c#源码
API摄像头视频c#源码
using System;
using System.Runtime.InteropServices;
public class VideoAPI
{
[DllImport("avicap32.dll")]
public static extern IntPtr capCreateCaptureWindowA(byte[] IpszWindowName,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[] ipszVer,int cbVer);
[DllImport("User32.dll")]
public static extern bool SendMessage(IntPtr hWnd,int wMsg,bool wParam,int iparam);
[DllImport("User32.dll")]
public static extern bool SendMessage(IntPtr hWnd,int wMsg,short wParam,long iparam);
#region 消息常量(向窗口发送消息的指令)
//消息常量 --------------------------------------------
public const int WM_START = 0x400; //此并非摄像头消息0x400表示的就是1024
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_GET_CAPSTREAMPTR = WM_START 1;
public const int WM_CAP_SET_CALLBACK_ERROR = WM_START 2;//设置收回错误
public const int WM_CAP_SET_CALLBACK_STATUS = WM_START 3;//设置收回状态
public const int WM_CAP_SET_CALLBACK_YIELD = WM_START 4;//设置收回出产
public const int WM_CAP_SET_CALLBACK_FRAME = WM_START 5;//设置收回结构
public const int WM_CAP_SET_CALLBACK_VIDEOSTREAM = WM_START 6;//设置收回视频流
public const int WM_CAP_SET_CALLBACK_WAVESTREAM = WM_START 7;//设置收回视频波流
public const int WM_CAP_GET_USER_DATA = WM_START 8;//获得使用者数据
public const int WM_CAP_SET_USER_DATA = WM_START 9;//设置使用者数据
public const int WM_CAP_DRIVER_CONNECT = WM_START 10;//驱动程序连接
public const int WM_CAP_DRIVER_DISCONNECT = WM_START 11;//断开启动程序连接
public const int WM_CAP_DRIVER_GET_NAME = WM_START 12;//获得驱动程序名字
public const int WM_CAP_DRIVER_GET_VERSION = WM_START 13;//获得驱动程序版本
public const int WM_CAP_DRIVER_GET_CAPS = WM_START 14;//获得驱动程序帽子
public const int WM_CAP_FILE_SET_CAPTURE_FILE = WM_START 20;//设置捕获文件
public const int WM_CAP_FILE_GET_CAPTURE_FILE = WM_START 21;//获得捕获文件
public const int WM_CAP_FILE_ALLOCATE = WM_START 22;//分派文件
public const int WM_CAP_FILE_SAVEAS = WM_START 23;//另存文件为
public const int WM_CAP_FILE_SET_INFOCHUNK = WM_START 24;//设置开始文件
public const int WM_CAP_FILE_SAVEDIB = WM_START 25;//保存文件
public const int WM_CAP_EDIT_COPY = WM_START 30;//编辑复制
public const int WM_CAP_SET_AUDIOFORMAT = WM_START 35;//设置音频格式
public const int WM_CAP_GET_AUDIOFORMAT = WM_START 36;//捕获音频格式
public const int WM_CAP_DLG_VIDEOFORMAT = WM_START 41;//1065 打开视频格式设置对话框
public const int WM_CAP_DLG_VIDEOSOURCE = WM_START 42;//1066 打开属性设置对话框，设置对比度亮度等
public const int WM_CAP_DLG_VIDEODISPLAY = WM_START 43;//1067 打开视频显示
public const int WM_CAP_GET_VIDEOFORMAT = WM_START 44;//1068 获得视频格式
public const int WM_CAP_SET_VIDEOFORMAT = WM_START 45;//1069 设置视频格式
public const int WM_CAP_DLG_VIDEOCOMPRESSION = WM_START 46;//1070 打开压缩设置对话框
public const int WM_CAP_SET_PREVIEW = WM_START 50;//设置预览
public const int WM_CAP_SET_OVERLAY = WM_START 51;//设置覆盖
public const int WM_CAP_SET_PREVIEWRATE = WM_START 52;//设置预览比例
public const int WM_CAP_SET_SCALE = WM_START 53;//设置刻度
public const int WM_CAP_GET_STATUS = WM_START 54;//获得状态
public const int WM_CAP_SET_SCROLL = WM_START 55;//设置卷
public const int WM_CAP_GRAB_FRAME = WM_START 60;//逮捕结构
public const int WM_CAP_GRAB_FRAME_NOSTOP = WM_START 61;//停止逮捕结构
public const int WM_CAP_SEQUENCE = WM_START 62;//次序
public const int WM_CAP_SEQUENCE_NOFILE = WM_START 63;//使用WM_CAP_SEUENCE_NOFILE消息（capCaptureSequenceNoFile宏），可以不向磁盘文件写入数据。该消息仅在配合回调函数时有用，它允许你的应用程序直接使用音视频数据。
public const int WM_CAP_SET_SEQUENCE_SETUP = WM_START 64;//设置安装次序
public const int WM_CAP_GET_SEQUENCE_SETUP = WM_START 65;//获得安装次序
public const int WM_CAP_SET_MCI_DEVICE = WM_START 66;//设置媒体控制接口
public const int WM_CAP_GET_MCI_DEVICE = WM_START 67;//获得媒体控制接口
public const int WM_CAP_STOP = WM_START 68;//停止
public const int WM_CAP_ABORT = WM_START 69;//异常中断
public const int WM_CAP_SINGLE_FRAME_OPEN = WM_START 70;//打开单一的结构
public const int WM_CAP_SINGLE_FRAME_CLOSE = WM_START 71;//关闭单一的结构
public const int WM_CAP_SINGLE_FRAME = WM_START 72;//单一的结构
public const int WM_CAP_PAL_OPEN = WM_START 80;//打开视频
public const int WM_CAP_PAL_SAVE = WM_START 81;//保存视频
public const int WM_CAP_PAL_PASTE = WM_START 82;//粘贴视频
public const int WM_CAP_PAL_AUTOCREATE = WM_START 83; //自动创造
public const int WM_CAP_PAL_MANUALCREATE = WM_START 84;//手动创造
public const int WM_CAP_SET_CALLBACK_CAPCONTROL = WM_START 85;// 设置收回的错误
#endregion 消息常量
}
public class Video
{
private IntPtr lwndc;//保存无符号句柄
private IntPtr mControlPtr;//保存管理指示器
private int mWidth;
private int mHeight;
/// <summary>
/// 初始化Video
/// </summary>
/// <param name="handle">对象的handle</param>
/// <param name="width">对象的高</param>
/// <param name="height">对象的宽</param>
public Video(IntPtr handle,int width,int height)
{
mControlPtr =handle;
mWidth =width;
mHeight = height;
}
/// <summary>
/// 开启
/// </summary>
public void StartVideo()
{
byte[] ipszName =new byte[100];
byte[] ipszVer = new byte[100];
VideoAPI.capGetDriverDescriptionA(0,ipszName,100,ipszVer,100);
this.lwndc=VideoAPI.capCreateCaptureWindowA(ipszName,VideoAPI.WS_CHILD|VideoAPI.WS_VISIBLE,0,0,mWidth,mHeight,mControlPtr,0);
if (VideoAPI.SendMessage(lwndc, VideoAPI.WM_CAP_DRIVER_CONNECT, 0, 0))
{
VideoAPI.SendMessage(this.lwndc, VideoAPI.WM_CAP_SET_OVERLAY, 1, 0);//启用叠加 注：据说启用此项可以加快渲染速度
VideoAPI.SendMessage(lwndc, VideoAPI.WM_CAP_SET_PREVIEWRATE, 30, 0);//设置在PREVIEW模式下设定视频窗口的刷新率 设置每30毫秒显示一帧，即显示帧速为每秒29帧
VideoAPI.SendMessage(lwndc, VideoAPI.WM_CAP_SET_PREVIEW, 1, 0);//设置显示图像启动预览模式 PREVIEW
}else
{
VideoAPI.SendMessage(lwndc,VideoAPI.WM_CAP_SET_PREVIEW,true,0);
}
}
/// <summary>
/// 关闭视频
/// </summary>
public void CloseVideo()
{
VideoAPI.SendMessage(lwndc,VideoAPI.WM_CAP_DRIVER_DISCONNECT,0,0);
}
/// <summary>
/// 截图
/// </summary>
/// <param name="path">保存图片的路径</param>
public void GrabImage(String path)
{
IntPtr hBmp = Marshal.StringToHGlobalAnsi(path);
VideoAPI.SendMessage(lwndc, VideoAPI.WM_CAP_FILE_SAVEDIB,0,hBmp.ToInt64());
}
/// <summary>
/// 开始录像
/// </summary>
/// <param name="PATH">保存文件的路径</param>
public void StartKinescope(String PATH)
{
IntPtr hBmp = Marshal.StringToHGlobalAnsi(PATH);
VideoAPI.SendMessage(lwndc, VideoAPI.WM_CAP_FILE_SET_CAPTURE_FILE,0, hBmp.ToInt64());
VideoAPI.SendMessage(lwndc, VideoAPI.WM_CAP_SEQUENCE, 0, 0);
}
/// <summary>
/// 停止录像
/// </summary>
public void Stop()
{
VideoAPI.SendMessage(lwndc,VideoAPI.WM_CAP_STOP,0,0);
}
/// <summary>
/// 视频压缩
/// </summary>
public void setVideoCompression()
{
VideoAPI.SendMessage(this.lwndc, VideoAPI.WM_CAP_DLG_VIDEOCOMPRESSION, 0, 0);
}
}