private void OnMessage(IntPtr hMidi, MidiMessage wMsg, IntPtr dwInstance, IntPtr dwParam1, IntPtr dwParam2)
{
if (!IsListeningForEvents)
{
return;
}
switch (wMsg)
{
case MidiMessage.MIM_DATA:
case MidiMessage.MIM_MOREDATA:
OnShortMessage(dwParam1.ToInt32());
break;
case MidiMessage.MIM_LONGDATA:
OnSysExMessage(dwParam1);
break;
case MidiMessage.MIM_ERROR:
byte statusByte, firstDataByte, secondDataByte;
MidiWinApi.UnpackShortEventBytes(dwParam1.ToInt32(), out statusByte, out firstDataByte, out secondDataByte);
OnInvalidShortEventReceived(statusByte, firstDataByte, secondDataByte);
break;
case MidiMessage.MIM_LONGERROR:
OnInvalidSysExEventReceived(MidiWinApi.UnpackSysExBytes(dwParam1));
break;
}
}
private void OnSysExEventSent(IntPtr sysExHeaderPointer)
{
byte[] data = null;
try
{
data = MidiWinApi.UnpackSysExBytes(sysExHeaderPointer);
var midiEvent = new NormalSysExEvent(data);
OnEventSent(midiEvent);
UnprepareSysExBuffer(sysExHeaderPointer);
_sysExHeadersPointers.Remove(sysExHeaderPointer);
}
catch (Exception ex)
{
var exception = new MidiDeviceException("Failed to parse sent system exclusive event.", ex);
exception.Data.Add("Data", data);
OnError(exception);
}
}
private void OnSysExMessage(IntPtr sysExHeaderPointer)
{
byte[] data = null;
try
{
data = MidiWinApi.UnpackSysExBytes(sysExHeaderPointer);
var midiEvent = new NormalSysExEvent(data);
OnEventReceived(midiEvent);
UnprepareSysExBuffer(sysExHeaderPointer);
PrepareSysExBuffer();
}
catch (Exception ex)
{
var exception = new MidiDeviceException($"Failed to parse system exclusive message.", ex);
exception.Data.Add("Data", data);
OnError(exception);
}
}