HIKVision C＃SDK-音频异常检测

问题描述

我正在尝试通过C＃SDK（CHCNetSDK.cs）配置音频丢失检测，而我正努力寻找与此有关的任何文档。我可以连接到设备并登录，下一步是从设备获取现有的音频异常检测配置

我很确定我需要使用CHCNetSDK.NET_VCA_AUdio_ABnorMAL

这是我到目前为止所拥有的

public static CHCNetSDK.NET_VCA_AUdio_ABnorMAL? GetDevice_AudioDetectConfig(int userID,uint channel)
        {
            NET_VCA_AUdio_ABnorMAL result = new NET_VCA_AUdio_ABnorMAL();

            int nSize = Marshal.SizeOf(result);
            //result.dwSize = (uint)nSize;
            IntPtr ptrConfig = Marshal.AllocHGlobal(nSize);
            Marshal.StructuretoPtr(result,ptrConfig,false);
            UInt32 dwReturn = 0;
            if (CHCNetSDK.NET_DVR_GetDVRConfig(userID,CHCNetSDK.NET_DVR_GET_PICCFG_V30,(int)channel,(uint)nSize,ref dwReturn))
            {

                result = (CHCNetSDK.NET_VCA_AUdio_ABnorMAL)Marshal.PtrToStructure(ptrConfig,typeof(CHCNetSDK.NET_VCA_AUdio_ABnorMAL));
                Marshal.FreeHGlobal(ptrConfig);
                return result;
            }
            else
            {
                Marshal.FreeHGlobal(ptrConfig);
                return null;
            }
        }

我认为这一行是错误的，NET_DVR_GetDVRConfig是错误的调用方法

CHCNetSDK.NET_DVR_GetDVRConfig(userID,ref dwReturn)

如果有人能指出正确的方向，我将不胜感激。

解决方法

首先从https://www.hikvision.com/en/support/download/sdk/下载最新的SDK

这是我与HCNetSDK.dll进行交互以启用音频检测所需的代码

[DllImport("HCNetSDK.dll",EntryPoint = "NET_DVR_GetDeviceConfig")]
public static extern bool NET_DVR_GetDeviceConfig2(int lUserID,uint dwCommand,uint dwCount,IntPtr lpInBuffer,uint dwInBufferSize,IntPtr lpStatusList,IntPtr lpOutBuffer,uint dwOutBufferSize);

[DllImport("HCNetSDK.dll",EntryPoint = "NET_DVR_SetDeviceConfig")]
public static extern bool NET_DVR_SetDeviceConfig2(int lUserID,IntPtr lpInParamBuffer,uint dwInParamBufferSize);

这进入CHCNetSDK.cs文件

[StructLayoutAttribute(LayoutKind.Sequential)]
public struct NET_VCA_AUDIO_ABNORMAL
        {
            public ushort wDecibel;
            public byte bySensitivity;
            public byte byAudioMode;
            public byte byEnable;
            public byte byThreshold;
            [MarshalAsAttribute(UnmanagedType.ByValArray,SizeConst = 54,ArraySubType = UnmanagedType.I1)]
            public byte[] byRes;
        }

[StructLayoutAttribute(LayoutKind.Sequential)]
public struct NET_DVR_AUDIO_EXCEPTION
        {
            public uint dwSize;
            public byte byEnableAudioInException; 
            [MarshalAsAttribute(UnmanagedType.ByValArray,SizeConst = 3,ArraySubType = UnmanagedType.I1)]
            public byte[] byRes1;
            public NET_VCA_AUDIO_ABNORMAL struAudioAbnormal;
            [MarshalAsAttribute(UnmanagedType.ByValArray,SizeConst = MAX_DAYS * MAX_TIMESEGMENT_V30,ArraySubType = UnmanagedType.Struct)]
            public NET_DVR_SCHEDTIME[] struAlarmSched;
            public NET_DVR_HANDLEEXCEPTION_V40 struHandleException;
            public uint dwMaxRelRecordChanNum;
            public uint dwRelRecordChanNum;
            [MarshalAsAttribute(UnmanagedType.ByValArray,SizeConst = MAX_CHANNUM_V30,ArraySubType = UnmanagedType.U4)]
            public uint[] byRelRecordChan;
            [MarshalAsAttribute(UnmanagedType.ByValArray,SizeConst = 32,ArraySubType = UnmanagedType.I1)]
            public byte[] byRes2;
        }

[StructLayoutAttribute(LayoutKind.Sequential)]
public struct NET_DVR_CHANNEL_GROUP
        {
            public uint dwSize;
            public uint dwChannel;
            public uint dwGroup;
            public byte ByID;

            [MarshalAsAttribute(UnmanagedType.ByValArray,ArraySubType = UnmanagedType.I1)]
            public byte[] byRes1;

            public byte dwPositionNo;

[MarshalAsAttribute(UnmanagedType.ByValArray,SizeConst = 56,ArraySubType = UnmanagedType.I1)]
public byte[] byRes;
        }

public static CHCNetSDK.NET_DVR_AUDIO_EXCEPTION? GetDevice_AudioDetectConfig(int userID,uint channel)
{
            NET_DVR_CHANNEL_GROUP channelGroup = new NET_DVR_CHANNEL_GROUP();
            channelGroup.dwSize = (uint)Marshal.SizeOf(channelGroup);
            channelGroup.dwChannel = channel;
            IntPtr lpInBuffer = Marshal.AllocHGlobal(Marshal.SizeOf(channelGroup));
            Marshal.StructureToPtr(channelGroup,lpInBuffer,false);
            uint dwInBufferSize = Convert.ToUInt32(channelGroup.dwSize);

            NET_DVR_AUDIO_EXCEPTION result = new NET_DVR_AUDIO_EXCEPTION();
            result.dwSize = (uint)Marshal.SizeOf(result);
            IntPtr lpOutBuffer = Marshal.AllocHGlobal(Marshal.SizeOf(result));
            Marshal.StructureToPtr(result,lpOutBuffer,false);
            uint dwOutBufferSize = Convert.ToUInt32(result.dwSize);

            uint lp = 1;
            IntPtr lpStatusList = Marshal.AllocHGlobal(Marshal.SizeOf(lp));
            
            var b = CHCNetSDK.NET_DVR_GetDeviceConfig2(userID,NET_DVR_GET_AUDIOEXCEPTIONPARAM,1,dwInBufferSize,lpStatusList,dwOutBufferSize);
            if (b)
            {
                result = (CHCNetSDK.NET_DVR_AUDIO_EXCEPTION)Marshal.PtrToStructure(lpOutBuffer,typeof(CHCNetSDK.NET_DVR_AUDIO_EXCEPTION));
                Marshal.FreeHGlobal(lpInBuffer);
                Marshal.FreeHGlobal(lpOutBuffer);
                return result;
            }
            else
            {                
                Marshal.FreeHGlobal(lpInBuffer);
                Marshal.FreeHGlobal(lpOutBuffer);
                return null;
            }
}

public static bool SetDevice_AudioDetectConfig(int userID,int channel,CHCNetSDK.NET_DVR_AUDIO_EXCEPTION config)
{
            NET_DVR_CHANNEL_GROUP channelGroup = new NET_DVR_CHANNEL_GROUP();
            channelGroup.dwSize = (uint)Marshal.SizeOf(channelGroup);
            channelGroup.dwChannel = (uint)channel;
            IntPtr lpInBuffer = Marshal.AllocHGlobal(Marshal.SizeOf(channelGroup));
            Marshal.StructureToPtr(channelGroup,false);
            uint dwInBufferSize = Convert.ToUInt32(channelGroup.dwSize);

            uint lp = 1;
            IntPtr lpStatusList = Marshal.AllocHGlobal(Marshal.SizeOf(lp));

            config.dwSize = (uint)Marshal.SizeOf(config);
            IntPtr lpInParamBuffer = Marshal.AllocHGlobal(Marshal.SizeOf(config));
            Marshal.StructureToPtr(config,lpInParamBuffer,false);            
            uint dwInParamBufferSize = Convert.ToUInt32(config.dwSize);

            bool success = CHCNetSDK.NET_DVR_SetDeviceConfig2(userID,NET_DVR_SET_AUDIOEXCEPTIONPARAM,dwInParamBufferSize);

            Marshal.FreeHGlobal(lpInBuffer);
            Marshal.FreeHGlobal(lpInParamBuffer);

            return success;
}