EnumAVDevice.dll 获取系统中音视频设备名称

C++ dll 可用C#调用 //获取系统中音视频设备名，和FFmpeg名字完全匹配 //dev 设备名数组 //type：0音频设备，1视频设备 //num，获取的设备数量 extern "C" TESTDLL_API HRESULT GetAVDevices(TCHAR * *dev, int type, int& num); C#调用方式： [DllImport("EnumAVDevice.dll", CallingConvention = CallingConvention.Cdecl)] public static extern int GetAVDevices(IntPtr[] dev, int type, ref int num); int num = 0; var dev = new IntPtr[10]; for (int i = 0; i < 10; i++) dev[i] = Marshal.AllocHGlobal(128); GetAVDevices(dev, 0, ref num); for (int i = 0; i < num; ++i) System.Diagnostics.Debug.WriteLine($"====>>{Marshal.PtrToStringAuto(dev[i])}"); for (int i = 0; i < 10; i++) Marshal.FreeHGlobal(dev[i]);