FMOD.DSP.FMOD_DSP_GetInput C# (CSharp) Method

        private static extern RESULT FMOD_DSP_GetInput                  (IntPtr dsp, int index, out IntPtr input, out IntPtr inputconnection);
        [DllImport(VERSION.dll)]

        public RESULT getInput(int index, ref DSP input, ref DSPConnection inputconnection)
        {
            RESULT rESULT = RESULT.OK;
            IntPtr raw    = IntPtr.Zero;
            IntPtr raw2   = IntPtr.Zero;

            try
            {
                rESULT = DSP.FMOD_DSP_GetInput(dspraw, index, ref raw, ref raw2);
            }
            catch
            {
                rESULT = RESULT.ERR_INVALID_PARAM;
            }
            RESULT result;

            if (rESULT != RESULT.OK)
            {
                result = rESULT;
            }
            else
            {
                if (input == null)
                {
                    DSP dSP = new DSP();
                    dSP.setRaw(raw);
                    input = dSP;
                }
                else
                {
                    input.setRaw(raw);
                }
                if (inputconnection == null)
                {
                    DSPConnection dSPConnection = new DSPConnection();
                    dSPConnection.setRaw(raw2);
                    inputconnection = dSPConnection;
                }
                else
                {
                    inputconnection.setRaw(raw2);
                }
                result = rESULT;
            }
            return(result);
        }