public void MidiOutCallback(MIDI_WIN32_MSDN.HMIDIOUT hMidiOut, MIDI_WIN32_MSDN wMsg, UIntPtr dwInstance, UIntPtr dwParam1, UIntPtr dwParam2) { if (wMsg.ToString() == "MOM_OPEN") { MIDI_WIN32_MSDN.midiOutPrepareHeader(hMidiOut, IntPtr.Zero, 65536); } else if (wMsg.ToString() == "MOM_DONE") { // do buffering (void code) } else if (wMsg.ToString() == "MOM_CLOSE") { MIDI_WIN32_MSDN.midiOutUnprepareHeader(hMidiOut, IntPtr.Zero, 65536); } }
//Use one of the following techniques to pass instance data from an application to a callback function: //Use the dwCallbackInstance parameter of the function that opens the device driver. //Use the dwUser member of the MIDIHDR structure that identifies a data block being sent to a MIDI device driver. public static void callback(MIDI_WIN32_MSDN.HMIDIIN hMidiIn, MIDI_WIN32_MSDN wMsg, UIntPtr dwInstance, UIntPtr dwParam1, UIntPtr dwParam2) { if (wMsg.ToString() == "MIM_OPEN") { } else if (wMsg.ToString() == "MIM_DATA") { byte[] data = new byte[4]; int highword = unchecked ((short)(long)dwParam1); int lowword = unchecked ((short)((long)dwParam1 >> 16)); // unchecked : 오버플로 검사 안함 data[0] = 0x90; data[1] = (byte)(highword >> 8); data[2] = (byte)(lowword & 0xff); uint msg = BitConverter.ToUInt32(data, 0); res = MIDI_WIN32_MSDN.midiOutShortMsg(ohandle, (int)msg); UIntPtr timestamp = dwParam2; //Console.WriteLine(String.Format("{0} :\n\tNote Index: {1}\n\tNote Velocity: {2}\n\tTimestamp: {3}", wMsg, data[1], data[2], timestamp)); } return; }