Ejemplo n.º 1
0
        /// <summary>
        /// 打开视频设备
        /// </summary>
        public bool StartWebCam()
        {
            //byte[] lpszName = new byte[100];
            //byte[] lpszVer = new byte[100];
            //VideoAPI.capGetDriverDescriptionA(0, lpszName, 100, lpszVer, 100);
            //this.lwndC = VideoAPI.capCreateCaptureWindowA(lpszName, 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(lwndC, VideoAPI.WM_CAP_SET_PREVIEWRATE, 100, 0);
            //    VideoAPI.SendMessage(lwndC, VideoAPI.WM_CAP_SET_PREVIEW, true, 0);
            //    return true;
            //}
            //else
            //{
            //    return false;
            //}
            this.lwndC = VideoAPI.capCreateCaptureWindow("", VideoAPI.WS_CHILD | VideoAPI.WS_VISIBLE, 0, 0, mWidth, mHeight, mControlPtr, 0); //AVICap类的捕捉窗口
            VideoAPI.FrameEventHandler FrameEventHandler = new VideoAPI.FrameEventHandler(FrameCallback);
            VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_CALLBACK_ERROR, 0, 0);                                                       //注册错误回调函数
            VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_CALLBACK_STATUS, 0, 0);                                                      //注册状态回调函数
            VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0, 0);                                                 //注册视频流回调函数
            VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_CALLBACK_FRAME, 0, FrameEventHandler);                                       //注册帧回调函数

            //if (!CapDriverCAPS.fCaptureInitialized)//判断当前设备是否被其他设备连接已经连接
            //{

            if (VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_DRIVER_CONNECT, 0, 0))
            {
                //-----------------------------------------------------------------------
                VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_DRIVER_GET_CAPS, VideoAPI.SizeOf(CapDriverCAPS), ref CapDriverCAPS); //获得当前视频 CAPDRIVERCAPS定义了捕获驱动器的能力,如有无视频叠加能力、有无控制视频源、视频格式的对话框等;
                VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_GET_STATUS, VideoAPI.SizeOf(CapStatus), ref CapStatus);              //获得当前视频流的尺寸 存入CapStatus结构

                VideoAPI.BITMAPINFO bitmapInfo = new VideoAPI.BITMAPINFO();                                                           //设置视频格式 (height and width in pixels, bits per frame).
                bitmapInfo.bmiHeader            = new VideoAPI.BITMAPINFOHEADER();
                bitmapInfo.bmiHeader.biSize     = VideoAPI.SizeOf(bitmapInfo.bmiHeader);
                bitmapInfo.bmiHeader.biWidth    = mWidth;
                bitmapInfo.bmiHeader.biHeight   = mHeight;
                bitmapInfo.bmiHeader.biPlanes   = 1;
                bitmapInfo.bmiHeader.biBitCount = 24;
                VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_PREVIEWRATE, 40, 0); //设置在PREVIEW模式下设定视频窗口的刷新率 设置每40毫秒显示一帧,即显示帧速为每秒25帧
                VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_SCALE, 1, 0);        //打开预览视频的缩放比例
                VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_VIDEOFORMAT, VideoAPI.SizeOf(bitmapInfo), ref bitmapInfo);

                this.mFrameEventHandler = new VideoAPI.FrameEventHandler(FrameCallback);
                this.capSetCallbackOnFrame(this.lwndC, this.mFrameEventHandler);


                VideoAPI.CAPTUREPARMS captureparms = new VideoAPI.CAPTUREPARMS();
                VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_GET_SEQUENCE_SETUP, VideoAPI.SizeOf(captureparms), ref captureparms);
                if (CapDriverCAPS.fHasOverlay)
                {
                    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(this.lwndC, VideoAPI.WM_CAP_SET_PREVIEW, 1, 0);                                      //设置显示图像启动预览模式 PREVIEW
                VideoAPI.SetWindowPos(this.lwndC, 0, 0, 0, mWidth, mHeight, VideoAPI.SWP_NOZORDER | VideoAPI.SWP_NOMOVE); //使捕获窗口与进来的视频流尺寸保持一致
                return(true);
            }
            else
            {
                flag = false;
                return(false);
            }
        }
Ejemplo n.º 2
0
        /// <summary>
        /// 打开视频设备
        /// </summary>
        public bool StartWebCam()
        {
            //byte[] lpszName = new byte[100];
            //byte[] lpszVer = new byte[100];
            //VideoAPI.capGetDriverDescriptionA(0, lpszName, 100, lpszVer, 100);
            //this.lwndC = VideoAPI.capCreateCaptureWindowA(lpszName, 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(lwndC, VideoAPI.WM_CAP_SET_PREVIEWRATE, 100, 0);
            //    VideoAPI.SendMessage(lwndC, VideoAPI.WM_CAP_SET_PREVIEW, true, 0);
            //    return true;
            //}
            //else
            //{
            //    return false;
            //}
            this.lwndC = VideoAPI.capCreateCaptureWindow("", VideoAPI.WS_CHILD | VideoAPI.WS_VISIBLE, 0, 0, mWidth, mHeight, mControlPtr, 0);//AVICap类的捕捉窗口
            VideoAPI.FrameEventHandler FrameEventHandler = new VideoAPI.FrameEventHandler(FrameCallback);
            VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_CALLBACK_ERROR, 0, 0);//注册错误回调函数
            VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_CALLBACK_STATUS, 0, 0);//注册状态回调函数
            VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0, 0);//注册视频流回调函数
            VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_CALLBACK_FRAME, 0, FrameEventHandler);//注册帧回调函数

            //if (!CapDriverCAPS.fCaptureInitialized)//判断当前设备是否被其他设备连接已经连接
            //{

            if (VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_DRIVER_CONNECT, 0, 0))
            {
                //-----------------------------------------------------------------------
                VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_DRIVER_GET_CAPS, VideoAPI.SizeOf(CapDriverCAPS), ref CapDriverCAPS);//获得当前视频 CAPDRIVERCAPS定义了捕获驱动器的能力,如有无视频叠加能力、有无控制视频源、视频格式的对话框等;
                VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_GET_STATUS, VideoAPI.SizeOf(CapStatus), ref CapStatus);//获得当前视频流的尺寸 存入CapStatus结构

                VideoAPI.BITMAPINFO bitmapInfo = new VideoAPI.BITMAPINFO();//设置视频格式 (height and width in pixels, bits per frame).
                bitmapInfo.bmiHeader = new VideoAPI.BITMAPINFOHEADER();
                bitmapInfo.bmiHeader.biSize = VideoAPI.SizeOf(bitmapInfo.bmiHeader);
                bitmapInfo.bmiHeader.biWidth = mWidth;
                bitmapInfo.bmiHeader.biHeight = mHeight;
                bitmapInfo.bmiHeader.biPlanes = 1;
                bitmapInfo.bmiHeader.biBitCount = 24;
                VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_PREVIEWRATE, 40, 0);//设置在PREVIEW模式下设定视频窗口的刷新率 设置每40毫秒显示一帧,即显示帧速为每秒25帧
                VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_SCALE, 1, 0);//打开预览视频的缩放比例
                VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_VIDEOFORMAT, VideoAPI.SizeOf(bitmapInfo), ref bitmapInfo);

                this.mFrameEventHandler = new VideoAPI.FrameEventHandler(FrameCallback);
                this.capSetCallbackOnFrame(this.lwndC, this.mFrameEventHandler);

                VideoAPI.CAPTUREPARMS captureparms = new VideoAPI.CAPTUREPARMS();
                VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_GET_SEQUENCE_SETUP, VideoAPI.SizeOf(captureparms), ref captureparms);
                if (CapDriverCAPS.fHasOverlay)
                {
                    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(this.lwndC, VideoAPI.WM_CAP_SET_PREVIEW, 1, 0);//设置显示图像启动预览模式 PREVIEW
                VideoAPI.SetWindowPos(this.lwndC, 0, 0, 0, mWidth, mHeight, VideoAPI.SWP_NOZORDER | VideoAPI.SWP_NOMOVE);//使捕获窗口与进来的视频流尺寸保持一致
                return true;
            }
            else
            {

                flag = false;
                return false;
            }
        }