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   源码介绍

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using System;
using System.Windows.Forms;
using System.IO;
using System.Runtime.InteropServices;
using System.Threading;
using CaptureAudio;
using CaptureAudio.Wave;
using System.Drawing.Imaging;
using System.Drawing;
using System.Configuration;
using System.Diagnostics;

namespace NVRCsharpDemo
{

    public partial class MainWindow : Form
    {
        private bool m_bInitSDK = false;
        private bool m_bRecord = false;
        private uint iLastErr = 0;
        private Int32 m_lUserID = -1;
        private Int32 m_lRealHandle = -1;
        private string str1;
        private string str2;
        private Int32 i = 0;
        private Int32 m_lTree = 0;
        private string str;
        private long iSelIndex = 0;
        private uint dwAChanTotalNum = 0;
        private uint dwDChanTotalNum = 0;
        private Int32 m_lPort = -1;
        private IntPtr m_ptrRealHandle;
        private int[] iIPDevID = new int[96];
        private int[] iChannelNum = new int[96];

        private CHCNetSDK.REALDATACALLBACK RealData = null;
        public CHCNetSDK.NET_DVR_DEVICEINFO_V30 DeviceInfo;
        public CHCNetSDK.NET_DVR_IPPARACFG_V40 m_struIpParaCfgV40;
        public CHCNetSDK.NET_DVR_STREAM_MODE m_struStreamMode;
        public CHCNetSDK.NET_DVR_IPCHANINFO m_struChanInfo;
        public CHCNetSDK.NET_DVR_PU_STREAM_URL m_struStreamURL;
        public CHCNetSDK.NET_DVR_IPCHANINFO_V40 m_struChanInfoV40;
        private PlayCtrl.DECCBFUN m_fDisplayFun = null;
        public delegate void MyDebugInfo(string str);

        public MainWindow()
        {
            InitializeComponent();
            m_bInitSDK = CHCNetSDK.NET_DVR_Init();
            if (m_bInitSDK == false)
            {
                MessageBox.Show("NET_DVR_Init error!");
                return;
            }
            else
            {
                //保存SDK日志 To save the SDK log
                CHCNetSDK.NET_DVR_SetLogToFile(3, "C:\\SdkLog\\", true);


                for (int i = 0; i < 64; i  )
                {
                    iIPDevID[i] = -1;
                    iChannelNum[i] = -1;
                }
            }
        }

        public void DebugInfo(string str)
        {
            if (str.Length > 0)
            {
                str  = "\n";
                TextBoxInfo.AppendText(DateTime.Now   " "   str);
            }
        }

        private void btnLogin_Click(object sender, EventArgs e)
        {
            login();
        }

        void login()
        {
            if (m_lUserID < 0)
            {
                string DVRIPAddress = textBoxIP.Text; //设备IP地址或者域名 Device IP
                Int16 DVRPortNumber = Int16.Parse(textBoxPort.Text);//设备服务端口号 Device Port
                string DVRUserName = textBoxUserName.Text;//设备登录用户名 User name to login
                string DVRPassword = textBoxPassword.Text;//设备登录密码 Password to login

                //登录设备 Login the device
                m_lUserID = CHCNetSDK.NET_DVR_Login_V30(DVRIPAddress, DVRPortNumber, DVRUserName, DVRPassword, ref DeviceInfo);
                if (m_lUserID < 0)
                {
                    iLastErr = CHCNetSDK.NET_DVR_GetLastError();
                    str = "登录失败, 错误代码 = "   iLastErr; //登录失败，输出错误号 Failed to login and output the error code
                    DebugInfo(str);
                    return;
                }
                else
                {
                    //登录成功
                    DebugInfo("登录成功!");
                    btnLogin.Text = "登出";

                    dwAChanTotalNum = (uint)DeviceInfo.byChanNum;
                    dwDChanTotalNum = (uint)DeviceInfo.byIPChanNum   256 * (uint)DeviceInfo.byHighDChanNum;
                    if (dwDChanTotalNum > 0)
                    {
                        InfoIPChannel();
                    }
                    else
                    {
                        for (i = 0; i < dwAChanTotalNum; i  )
                        {
                            ListAnalogChannel(i   1, 1);
                            iChannelNum[i] = i   (int)DeviceInfo.byStartChan;
                        }

                        // MessageBox.Show("This device has no IP channel!");
                    }
                    preview();

                }
            }
            else
            {
                //注销登录 Logout the device
                if (m_lRealHandle >= 0)
                {
                    DebugInfo("Please stop live view firstly"); //登出前先停止预览 Stop live view before logout
                    return;
                }

                if (!CHCNetSDK.NET_DVR_Logout(m_lUserID))
                {
                    iLastErr = CHCNetSDK.NET_DVR_GetLastError();
                    str = "登出失败, 错误代码= "   iLastErr;
                    DebugInfo(str);
                    return;
                }
                DebugInfo("登出成功!");
                listViewIPChannel.Items.Clear();//清空通道列表 Clean up the channel list
                m_lUserID = -1;
                btnLogin.Text = "Login";
            }
            return;
        }

        public void InfoIPChannel()
        {
            uint dwSize = (uint)Marshal.SizeOf(m_struIpParaCfgV40);

            IntPtr ptrIpParaCfgV40 = Marshal.AllocHGlobal((Int32)dwSize);
            Marshal.StructureToPtr(m_struIpParaCfgV40, ptrIpParaCfgV40, false);

            uint dwReturn = 0;
            int iGroupNo = 0;  //该Demo仅获取第一组64个通道，如果设备IP通道大于64路，需要按组号0~i多次调用NET_DVR_GET_IPPARACFG_V40获取

            if (!CHCNetSDK.NET_DVR_GetDVRConfig(m_lUserID, CHCNetSDK.NET_DVR_GET_IPPARACFG_V40, iGroupNo, ptrIpParaCfgV40, dwSize, ref dwReturn))
            {
                iLastErr = CHCNetSDK.NET_DVR_GetLastError();
                str = "NET_DVR_GET_IPPARACFG_V40 failed, error code= "   iLastErr;
                //获取IP资源配置信息失败，输出错误号 Failed to get configuration of IP channels and output the error code
                DebugInfo(str);
            }
            else
            {
                DebugInfo("NET_DVR_GET_IPPARACFG_V40 succ!");

                m_struIpParaCfgV40 = (CHCNetSDK.NET_DVR_IPPARACFG_V40)Marshal.PtrToStructure(ptrIpParaCfgV40, typeof(CHCNetSDK.NET_DVR_IPPARACFG_V40));

                for (i = 0; i < dwAChanTotalNum; i  )
                {
                    ListAnalogChannel(i   1, m_struIpParaCfgV40.byAnalogChanEnable[i]);
                    iChannelNum[i] = i   (int)DeviceInfo.byStartChan;
                }

                byte byStreamType = 0;
                uint iDChanNum = 64;

                if (dwDChanTotalNum < 64)
                {
                    iDChanNum = dwDChanTotalNum; //如果设备IP通道小于64路，按实际路数获取
                }

                for (i = 0; i < iDChanNum; i  )
                {
                    iChannelNum[i   dwAChanTotalNum] = i   (int)m_struIpParaCfgV40.dwStartDChan;
                    byStreamType = m_struIpParaCfgV40.struStreamMode[i].byGetStreamType;

                    dwSize = (uint)Marshal.SizeOf(m_struIpParaCfgV40.struStreamMode[i].uGetStream);
                    switch (byStreamType)
                    {
                        //目前NVR仅支持直接从设备取流 NVR supports only the mode: get stream from device directly
                        case 0:
                            IntPtr ptrChanInfo = Marshal.AllocHGlobal((Int32)dwSize);
                            Marshal.StructureToPtr(m_struIpParaCfgV40.struStreamMode[i].uGetStream, ptrChanInfo, false);
                            m_struChanInfo = (CHCNetSDK.NET_DVR_IPCHANINFO)Marshal.PtrToStructure(ptrChanInfo, typeof(CHCNetSDK.NET_DVR_IPCHANINFO));

                            //列出IP通道 List the IP channel
                            ListIPChannel(i   1, m_struChanInfo.byEnable, m_struChanInfo.byIPID);
                            iIPDevID[i] = m_struChanInfo.byIPID   m_struChanInfo.byIPIDHigh * 256 - iGroupNo * 64 - 1;

                            Marshal.FreeHGlobal(ptrChanInfo);
                            break;
                        case 4:
                            IntPtr ptrStreamURL = Marshal.AllocHGlobal((Int32)dwSize);
                            Marshal.StructureToPtr(m_struIpParaCfgV40.struStreamMode[i].uGetStream, ptrStreamURL, false);
                            m_struStreamURL = (CHCNetSDK.NET_DVR_PU_STREAM_URL)Marshal.PtrToStructure(ptrStreamURL, typeof(CHCNetSDK.NET_DVR_PU_STREAM_URL));

                            //列出IP通道 List the IP channel
                            ListIPChannel(i   1, m_struStreamURL.byEnable, m_struStreamURL.wIPID);
                            iIPDevID[i] = m_struStreamURL.wIPID - iGroupNo * 64 - 1;

                            Marshal.FreeHGlobal(ptrStreamURL);
                            break;
                        case 6:
                            IntPtr ptrChanInfoV40 = Marshal.AllocHGlobal((Int32)dwSize);
                            Marshal.StructureToPtr(m_struIpParaCfgV40.struStreamMode[i].uGetStream, ptrChanInfoV40, false);
                            m_struChanInfoV40 = (CHCNetSDK.NET_DVR_IPCHANINFO_V40)Marshal.PtrToStructure(ptrChanInfoV40, typeof(CHCNetSDK.NET_DVR_IPCHANINFO_V40));

                            //列出IP通道 List the IP channel
                            ListIPChannel(i   1, m_struChanInfoV40.byEnable, m_struChanInfoV40.wIPID);
                            iIPDevID[i] = m_struChanInfoV40.wIPID - iGroupNo * 64 - 1;

                            Marshal.FreeHGlobal(ptrChanInfoV40);
                            break;
                        default:
                            break;
                    }
                }
            }
            Marshal.FreeHGlobal(ptrIpParaCfgV40);

        }
        public void ListIPChannel(Int32 iChanNo, byte byOnline, int byIPID)
        {
            str1 = String.Format("IPCamera {0}", iChanNo);
            m_lTree  ;

            if (byIPID == 0)
            {
                str2 = "X"; //通道空闲，没有添加前端设备 the channel is idle                  
            }
            else
            {
                if (byOnline == 0)
                {
                    str2 = "offline"; //通道不在线 the channel is off-line
                }
                else
                    str2 = "online"; //通道在线 The channel is on-line
            }

            listViewIPChannel.Items.Add(new ListViewItem(new string[] { str1, str2 }));//将通道添加到列表中 add the channel to the list
        }
        public void ListAnalogChannel(Int32 iChanNo, byte byEnable)
        {
            str1 = String.Format("Camera {0}", iChanNo);
            m_lTree  ;

            if (byEnable == 0)
            {
                str2 = "Disabled"; //通道已被禁用 This channel has been disabled               
            }
            else
            {
                str2 = "Enabled"; //通道处于启用状态 This channel has been enabled
            }

            listViewIPChannel.Items.Add(new ListViewItem(new string[] { str1, str2 }));//将通道添加到列表中 add the channel to the list
        }

        private void listViewIPChannel_ItemSelectionChanged(object sender, ListViewItemSelectionChangedEventArgs e)
        {
            if (listViewIPChannel.SelectedItems.Count > 0)
            {
                iSelIndex = listViewIPChannel.SelectedItems[0].Index;  //当前选中的行

            }
        }

        //解码回调函数
        private void DecCallbackFUN(int nPort, IntPtr pBuf, int nSize, ref PlayCtrl.FRAME_INFO pFrameInfo, int nReserved1, int nReserved2)
        {
            // 将pBuf解码后视频输入写入文件中（解码后YUV数据量极大，尤其是高清码流，不建议在回调函数中处理）
            if (pFrameInfo.nType == 3) //#define T_YV12	3
            {
                //    FileStream fs = null;
                //    BinaryWriter bw = null;
                //    try
                //    {
                //        fs = new FileStream("DecodedVideo.yuv", FileMode.Append);
                //        bw = new BinaryWriter(fs);
                //        byte[] byteBuf = new byte[nSize];
                //        Marshal.Copy(pBuf, byteBuf, 0, nSize);
                //        bw.Write(byteBuf);
                //        bw.Flush();
                //    }
                //    catch (System.Exception ex)
                //    {
                //        MessageBox.Show(ex.ToString());
                //    }
                //    finally
                //    {
                //        bw.Close();
                //        fs.Close();
                //    }
            }
        }

        public void RealDataCallBack(Int32 lRealHandle, UInt32 dwDataType, IntPtr pBuffer, UInt32 dwBufSize, IntPtr pUser)
        {
            //下面数据处理建议使用委托的方式
            MyDebugInfo AlarmInfo = new MyDebugInfo(DebugInfo);
            switch (dwDataType)
            {
                case CHCNetSDK.NET_DVR_SYSHEAD:     // sys head
                    if (dwBufSize > 0)
                    {
                        if (m_lPort >= 0)
                        {
                            return; //同一路码流不需要多次调用开流接口
                        }

                        //获取播放句柄 Get the port to play
                        if (!PlayCtrl.PlayM4_GetPort(ref m_lPort))
                        {
                            iLastErr = PlayCtrl.PlayM4_GetLastError(m_lPort);
                            str = "PlayM4_GetPort failed, error code= "   iLastErr;
                            this.BeginInvoke(AlarmInfo, str);
                            break;
                        }

                        //设置流播放模式 Set the stream mode: real-time stream mode
                        if (!PlayCtrl.PlayM4_SetStreamOpenMode(m_lPort, PlayCtrl.STREAME_REALTIME))
                        {
                            iLastErr = PlayCtrl.PlayM4_GetLastError(m_lPort);
                            str = "Set STREAME_REALTIME mode failed, error code= "   iLastErr;
                            this.BeginInvoke(AlarmInfo, str);
                        }

                        //打开码流，送入头数据 Open stream
                        if (!PlayCtrl.PlayM4_OpenStream(m_lPort, pBuffer, dwBufSize, 2 * 1024 * 1024))
                        {
                            iLastErr = PlayCtrl.PlayM4_GetLastError(m_lPort);
                            str = "PlayM4_OpenStream failed, error code= "   iLastErr;
                            this.BeginInvoke(AlarmInfo, str);
                            break;
                        }


                        //设置显示缓冲区个数 Set the display buffer number
                        if (!PlayCtrl.PlayM4_SetDisplayBuf(m_lPort, 15))
                        {
                            iLastErr = PlayCtrl.PlayM4_GetLastError(m_lPort);
                            str = "PlayM4_SetDisplayBuf failed, error code= "   iLastErr;
                            this.BeginInvoke(AlarmInfo, str);
                        }

                        //设置显示模式 Set the display mode
                        if (!PlayCtrl.PlayM4_SetOverlayMode(m_lPort, 0, 0/* COLORREF(0)*/)) //play off screen 
                        {
                            iLastErr = PlayCtrl.PlayM4_GetLastError(m_lPort);
                            str = "PlayM4_SetOverlayMode failed, error code= "   iLastErr;
                            this.BeginInvoke(AlarmInfo, str);
                        }

                        //设置解码回调函数，获取解码后音视频原始数据 Set callback function of decoded data
                        m_fDisplayFun = new PlayCtrl.DECCBFUN(DecCallbackFUN);
                        if (!PlayCtrl.PlayM4_SetDecCallBackEx(m_lPort, m_fDisplayFun, IntPtr.Zero, 0))
                        {
                            this.BeginInvoke(AlarmInfo, "PlayM4_SetDisplayCallBack fail");
                        }

                        //开始解码 Start to play                       
                        if (!PlayCtrl.PlayM4_Play(m_lPort, m_ptrRealHandle))
                        {
                            iLastErr = PlayCtrl.PlayM4_GetLastError(m_lPort);
                            str = "PlayM4_Play failed, error code= "   iLastErr;
                            this.BeginInvoke(AlarmInfo, str);
                            break;
                        }
                    }
                    break;
                case CHCNetSDK.NET_DVR_STREAMDATA:     // video stream data
                    if (dwBufSize > 0 && m_lPort != -1)
                    {
                        for (int i = 0; i < 999; i  )
                        {
                            //送入码流数据进行解码 Input the stream data to decode
                            if (!PlayCtrl.PlayM4_InputData(m_lPort, pBuffer, dwBufSize))
                            {
                                iLastErr = PlayCtrl.PlayM4_GetLastError(m_lPort);
                                str = "PlayM4_InputData failed, error code= "   iLastErr;
                                Thread.Sleep(2);
                            }
                            else
                            {
                                break;
                            }
                        }
                    }
                    break;
                default:
                    if (dwBufSize > 0 && m_lPort != -1)
                    {
                        //送入其他数据 Input the other data
                        for (int i = 0; i < 999; i  )
                        {
                            if (!PlayCtrl.PlayM4_InputData(m_lPort, pBuffer, dwBufSize))
                            {
                                iLastErr = PlayCtrl.PlayM4_GetLastError(m_lPort);
                                str = "PlayM4_InputData failed, error code= "   iLastErr;
                                Thread.Sleep(2);
                            }
                            else
                            {
                                break;
                            }
                        }
                    }
                    break;
            }
        }

        private void btnPreview_Click(object sender, EventArgs e)
        {
            preview();
        }


        void preview()
        {
            if (m_lUserID < 0)
            {
                MessageBox.Show("请先登录!");
                return;
            }

            if (m_bRecord)
            {
                MessageBox.Show("请先停止录制!");
                return;
            }

            if (m_lRealHandle < 0)
            {
                CHCNetSDK.NET_DVR_PREVIEWINFO lpPreviewInfo = new CHCNetSDK.NET_DVR_PREVIEWINFO();
                lpPreviewInfo.hPlayWnd = RealPlayWnd.Handle;//预览窗口 live view window
                lpPreviewInfo.lChannel = iChannelNum[(int)iSelIndex];//预览的设备通道 the device channel number
                lpPreviewInfo.dwStreamType = 0;//码流类型：0-主码流，1-子码流，2-码流3，3-码流4，以此类推
                lpPreviewInfo.dwLinkMode = 3;//连接方式：0- TCP方式，1- UDP方式，2- 多播方式，3- RTP方式，4-RTP/RTSP，5-RSTP/HTTP 
                lpPreviewInfo.bBlocked = true; //0- 非阻塞取流，1- 阻塞取流
                lpPreviewInfo.dwDisplayBufNum = 15; //播放库显示缓冲区最大帧数

                IntPtr pUser = IntPtr.Zero;//用户数据 user data 


                lpPreviewInfo.hPlayWnd = IntPtr.Zero;//预览窗口 live view window
                m_ptrRealHandle = RealPlayWnd.Handle;
                RealData = new CHCNetSDK.REALDATACALLBACK(RealDataCallBack);//预览实时流回调函数 real-time stream callback function 
                m_lRealHandle = CHCNetSDK.NET_DVR_RealPlay_V40(m_lUserID, ref lpPreviewInfo, RealData, pUser);

                if (m_lRealHandle < 0)
                {
                    iLastErr = CHCNetSDK.NET_DVR_GetLastError();
                    str = "预览失败,错误代码 "   iLastErr; //预览失败，输出错误号 failed to start live view, and output the error code.
                    DebugInfo(str);
                    return;
                }
                else
                {
                    //预览成功
                    DebugInfo("预览成功!");
                    btnPreview.Text = "停止";
                }
            }
            else
            {
                //停止预览 Stop live view 
                if (!CHCNetSDK.NET_DVR_StopRealPlay(m_lRealHandle))
                {
                    iLastErr = CHCNetSDK.NET_DVR_GetLastError();
                    str = "NET_DVR_StopRealPlay failed, error code= "   iLastErr;
                    DebugInfo(str);
                    return;
                }

                if ((m_lPort >= 0))
                {
                    if (!PlayCtrl.PlayM4_Stop(m_lPort))
                    {
                        iLastErr = PlayCtrl.PlayM4_GetLastError(m_lPort);
                        str = "PlayM4_Stop failed, error code= "   iLastErr;
                        DebugInfo(str);
                    }
                    if (!PlayCtrl.PlayM4_CloseStream(m_lPort))
                    {
                        iLastErr = PlayCtrl.PlayM4_GetLastError(m_lPort);
                        str = "PlayM4_CloseStream failed, error code= "   iLastErr;
                        DebugInfo(str);
                    }
                    if (!PlayCtrl.PlayM4_FreePort(m_lPort))
                    {
                        iLastErr = PlayCtrl.PlayM4_GetLastError(m_lPort);
                        str = "PlayM4_FreePort failed, error code= "   iLastErr;
                        DebugInfo(str);
                    }
                    m_lPort = -1;
                }

                DebugInfo("NET_DVR_StopRealPlay succ!");
                m_lRealHandle = -1;
                btnPreview.Text = "预览";
                RealPlayWnd.Invalidate();//刷新窗口 refresh the window
            }
            return;
        }

        private void btnBMP_Click(object sender, EventArgs e)
        {
            if (m_lRealHandle < 0)
            {
                DebugInfo("请先打开预览!"); //BMP抓图需要先打开预览
                return;
            }
            bmp();
        }


        void bmp()
        {
            stopwatch.Reset();
            stopwatch.Start();
            string sBmpPicFileName;
            //图片保存路径和文件名 the path and file name to save
            sBmpPicFileName = DateTime.Now.ToString("yyyyMMddhhmmss")   ".jpg";

            int iWidth = 0, iHeight = 0;
            uint iActualSize = 0;

            if (!PlayCtrl.PlayM4_GetPictureSize(m_lPort, ref iWidth, ref iHeight))
            {
                iLastErr = PlayCtrl.PlayM4_GetLastError(m_lPort);
                str = "抓图失败, 错误代码  "   iLastErr;
                DebugInfo(str);
                stopwatch.Reset();
                stopwatch.Start();
                return;
            }

            uint nBufSize = (uint)(iWidth * iHeight) * 5;

            byte[] pBitmap = new byte[nBufSize];

            if (!PlayCtrl.PlayM4_GetBMP(m_lPort, pBitmap, nBufSize, ref iActualSize))
            {
                iLastErr = PlayCtrl.PlayM4_GetLastError(m_lPort);
                str = "抓图失败, 错误代码  "   iLastErr;
                DebugInfo(str);
            }
            else
            {
                Bitmap bit = CompressImage(new MemoryStream(pBitmap));
                bit.Save(AppDomain.CurrentDomain.BaseDirectory   sBmpPicFileName);
                //FileStream fs = new FileStream(sBmpPicFileName, FileMode.Create);
                //fs.Write(img, 0, (int)iActualSize);
                //fs.Close();
                str = DateTime.Now   " : 抓图成功"   sBmpPicFileName;
                DebugInfo(str);
            }

        }

        /// <summary>
        /// Convert Byte[] to Image
        /// </summary>
        /// <param name="buffer"></param>
        /// <returns></returns>
        public static Image BytesToImage(byte[] buffer)
        {
            MemoryStream ms = new MemoryStream(buffer);
            Image image = System.Drawing.Image.FromStream(ms);
            return image;
        }
        /// <summary>
        /// Convert Byte[] to a picture and Store it in file
        /// </summary>
        /// <param name="fileName"></param>
        /// <param name="buffer"></param>
        /// <returns></returns>
        public static string CreateImageFromBytes(string fileName, byte[] buffer)
        {
            string file = fileName;
            Image image = BytesToImage(buffer);
            ImageFormat format = image.RawFormat;
            if (format.Equals(ImageFormat.Jpeg))
            {
                file  = ".jpeg";
            }
            else if (format.Equals(ImageFormat.Png))
            {
                file  = ".png";
            }
            else if (format.Equals(ImageFormat.Bmp))
            {
                file  = ".bmp";
            }
            else if (format.Equals(ImageFormat.Gif))
            {
                file  = ".gif";
            }
            else if (format.Equals(ImageFormat.Icon))
            {
                file  = ".icon";
            }
            System.IO.FileInfo info = new System.IO.FileInfo(file);
            System.IO.Directory.CreateDirectory(info.Directory.FullName);
            File.WriteAllBytes(file, buffer);
            return file;
        }

        /// <summary>
        /// 壓縮圖片 /// </summary>
        /// <param name="fileStream">圖片流</param>
        /// <param name="quality">壓縮質量0-100之間 數值越大質量越高</param>
        /// <returns></returns>
        private byte[] CompressionImage(Stream fileStream, long quality)
        {
            using (System.Drawing.Image img = System.Drawing.Image.FromStream(fileStream))
            {
                using (Bitmap bitmap = new Bitmap(img))
                {
                    ImageCodecInfo CodecInfo = GetEncoder(img.RawFormat);
                    System.Drawing.Imaging.Encoder myEncoder = System.Drawing.Imaging.Encoder.Quality;
                    EncoderParameters myEncoderParameters = new EncoderParameters(1);
                    EncoderParameter myEncoderParameter = new EncoderParameter(myEncoder, quality);
                    myEncoderParameters.Param[0] = myEncoderParameter;
                    using (MemoryStream ms = new MemoryStream())
                    {
                        bitmap.Save(ms, CodecInfo, myEncoderParameters);
                        myEncoderParameters.Dispose();
                        myEncoderParameter.Dispose();
                        return ms.ToArray();
                    }
                }
            }
        }

        private static ImageCodecInfo GetEncoder(ImageFormat format)
        {
            ImageCodecInfo[] codecs = ImageCodecInfo.GetImageDecoders();
            foreach (ImageCodecInfo codec in codecs)
            {
                if (codec.FormatID == format.Guid)
                { return codec; }
            }
            return null;
        }

        private void btn_Exit_Click(object sender, EventArgs e)
        {
            //停止预览
            if (m_lRealHandle >= 0)
            {
                CHCNetSDK.NET_DVR_StopRealPlay(m_lRealHandle);
                m_lRealHandle = -1;
            }

            //注销登录
            if (m_lUserID >= 0)
            {
                CHCNetSDK.NET_DVR_Logout(m_lUserID);
                m_lUserID = -1;
            }

            CHCNetSDK.NET_DVR_Cleanup();

            Application.Exit();
        }


        private void listViewIPChannel_MouseClick(object sender, MouseEventArgs e)
        {
            //if (e.Button == MouseButtons.Right)
            //{
            //    int iCurChan = iChannelNum[(int)iSelIndex];
            //    if (iCurChan >= m_struIpParaCfgV40.dwStartDChan)
            //    {
            //        if (DialogResult.OK == MessageBox.Show("是否配置该IP通道！", "配置提示", MessageBoxButtons.OKCancel))
            //        {
            //            IPChannelConfig dlg = new IPChannelConfig();
            //            dlg.m_struIPParaCfgV40 = m_struIpParaCfgV40;
            //            dlg.m_lUserID = m_lUserID;
            //            int iCurChanIndex = iCurChan - (int)m_struIpParaCfgV40.dwStartDChan; //通道索引
            //            int iCurIPDevIndex = iIPDevID[iCurChanIndex]; //设备ID索引
            //            dlg.iIPDevIndex = iCurIPDevIndex;
            //            dlg.iChanIndex = iCurChanIndex;
            //            dlg.ShowDialog();
            //        }
            //    }
            //    else
            //    {

            //    }
            //}
        }

        private void btnRefresh_Click(object sender, EventArgs e)
        {
            //刷新通道列表
            listViewIPChannel.Items.Clear();
            for (i = 0; i < dwAChanTotalNum; i  )
            {
                ListAnalogChannel(i   1, 1);
                iChannelNum[i] = i   (int)DeviceInfo.byStartChan;
            }
            InfoIPChannel();
        }

        private void btnPrivate_Click(object sender, EventArgs e)
        {
            int iPort = CHCNetSDK.NET_DVR_GetRealPlayerIndex(m_lRealHandle);
            if (iPort > -1)
            {
                if (!PlayCtrl.PlayM4_RenderPrivateData(iPort, 0x20, true))
                {
                    iLastErr = PlayCtrl.PlayM4_GetLastError(iPort);
                    str = "PlayM4_RenderPrivateData failed, error code= "   iLastErr;
                    DebugInfo(str);
                }
                if (!PlayCtrl.PlayM4_RenderPrivateDataEx(iPort, 0x00000020, 0x00000001   0x00000002   0x00000004, true))
                {
                    iLastErr = PlayCtrl.PlayM4_GetLastError(iPort);
                    str = "PlayM4_RenderPrivateDataEx failed, error code= "   iLastErr;
                    DebugInfo(str);
                }
                if (!PlayCtrl.PlayM4_SetOverlayPriInfoFlag(iPort, 0x20, true))
                {
                    iLastErr = PlayCtrl.PlayM4_GetLastError(iPort);
                    str = "PlayM4_SetOverlayPriInfoFlag failed, error code= "   iLastErr;
                    DebugInfo(str);
                }

            }
        }

        /// <summary>
        /// 无损压缩图片
        /// </summary>
        /// <param name="sFile">原图片地址</param>
        /// <param name="dFile">压缩后保存图片地址</param>
        /// <param name="flag">压缩质量（数字越小压缩率越高）1-100</param>
        /// <param name="size">压缩后图片的最大大小</param>
        /// <param name="sfsc">是否是第一次调用</param>
        /// <returns></returns>
        public Bitmap CompressImage(Stream s, int flag = 50, int size = 300, bool sfsc = true)
        {
            System.Drawing.Image iSource = System.Drawing.Image.FromStream(s);
            ImageFormat tFormat = iSource.RawFormat;

            int dHeight = iSource.Height;
            int dWidth = iSource.Width;
            int sW = 0, sH = 0;
            //按比例缩放
            Size tem_size = new Size(iSource.Width, iSource.Height);
            if (tem_size.Width > dHeight || tem_size.Width > dWidth)
            {
                if ((tem_size.Width * dHeight) > (tem_size.Width * dWidth))
                {
                    sW = dWidth;
                    sH = (dWidth * tem_size.Height) / tem_size.Width;
                }
                else
                {
                    sH = dHeight;
                    sW = (tem_size.Width * dHeight) / tem_size.Height;
                }
            }
            else
            {
                sW = tem_size.Width;
                sH = tem_size.Height;
            }

            Bitmap ob = new Bitmap(dWidth, dHeight);
            Graphics g = Graphics.FromImage(ob);

            g.Clear(Color.WhiteSmoke);
            g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
            g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
            g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;

            g.DrawImage(iSource, new Rectangle((dWidth - sW) / 2, (dHeight - sH) / 2, sW, sH), 0, 0, iSource.Width, iSource.Height, GraphicsUnit.Pixel);

            g.Dispose();

            //以下代码为保存图片时，设置压缩质量
            EncoderParameters ep = new EncoderParameters();
            long[] qy = new long[1];
            qy[0] = flag;//设置压缩的比例1-100
            EncoderParameter eParam = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, qy);
            ep.Param[0] = eParam;

            try
            {
                return ob;
            }
            catch
            {
                return null;
            }
            finally
            {
                iSource.Dispose();
            }
        }
        float MasterPeakValue = 0;
        private void MainWindow_Load(object sender, EventArgs e)
        {
            float.TryParse(ConfigurationManager.AppSettings["MasterPeakValue"].ToString(), out MasterPeakValue);
            textBoxIP.Text = ConfigurationManager.AppSettings["IP"].ToString();
            textBoxPort.Text = ConfigurationManager.AppSettings["PORT"].ToString();
            textBoxPassword.Text = ConfigurationManager.AppSettings["PASSWORD"].ToString();
            textBoxUserName.Text = ConfigurationManager.AppSettings["USER"].ToString();
            Start();
            login();
        }

        CaptureCore cc = new CaptureCore();
        System.Diagnostics.Stopwatch stopwatch = new System.Diagnostics.Stopwatch();
        private void OnDataAvailable(object sender, WaveInEventArgs e)
        {
            try
            {
                if (InvokeRequired)
                {
                    //Debug.WriteLine("Data Available");
                    BeginInvoke(new EventHandler<WaveInEventArgs>(OnDataAvailable), sender, e);
                }
                else
                {
                    float CurrentMasterPeakValue = cc.device.AudioMeterInformation.MasterPeakValue;
                    if (CurrentMasterPeakValue > 0.6)
                    {
                        if (stopwatch.Elapsed.TotalSeconds > 0.5)
                        {
                            bmp();
                        }
                    }
                }
            }
            catch (Exception ex)
            { }
        }
        void Start()
        {
            cc.DataAvailable  = OnDataAvailable;
            cc.Start();
            stopwatch.Start();
        }

        private void MainWindow_FormClosing(object sender, FormClosingEventArgs e)
        {
            Process.GetCurrentProcess().Kill();
        }
    }
}