/// <summary>
/// Create a number of buffers and make them available to receive incoming Sysex messages
/// </summary>
/// <param name="bufferSize">The size of each buffer, ideally large enough to hold a complete message from the device</param>
/// <param name="numberOfBuffers">The number of buffers needed to handle incoming Midi while busy</param>
public void CreateSysexBuffers(int bufferSize, int numberOfBuffers)
{
SysexBufferHeaders = new IntPtr[numberOfBuffers];
var hdrSize = Marshal.SizeOf(typeof(MidiInterop.MIDIHDR));
for (var i = 0; i < numberOfBuffers; i++)
{
var hdr = new MidiInterop.MIDIHDR();
hdr.dwBufferLength = bufferSize;
hdr.dwBytesRecorded = 0;
hdr.lpData = Marshal.AllocHGlobal(bufferSize);
hdr.dwFlags = 0;
var lpHeader = Marshal.AllocHGlobal(hdrSize);
Marshal.StructureToPtr(hdr, lpHeader, false);
MmException.Try(MidiInterop.midiInPrepareHeader(hMidiIn, lpHeader, Marshal.SizeOf(typeof(MidiInterop.MIDIHDR))), "midiInPrepareHeader");
MmException.Try(MidiInterop.midiInAddBuffer(hMidiIn, lpHeader, Marshal.SizeOf(typeof(MidiInterop.MIDIHDR))), "midiInAddBuffer");
SysexBufferHeaders[i] = lpHeader;
}
}