private void PrepareSysExBuffer()
{
var buffer = new byte[SysExBufferLength];
_sysExBufferPointer = Marshal.AllocHGlobal(buffer.Length);
Marshal.Copy(buffer, 0, _sysExBufferPointer, buffer.Length);
_sysExHeader = new MidiWinApi.MIDIHDR();
_sysExHeader.lpData = _sysExBufferPointer;
_sysExHeader.dwBufferLength = _sysExHeader.dwBytesRecorded = (uint)buffer.Length;
ProcessMmResult(() => MidiInWinApi.midiInPrepareHeader(_handle, ref _sysExHeader, Marshal.SizeOf(_sysExHeader)));
ProcessMmResult(() => MidiInWinApi.midiInAddBuffer(_handle, ref _sysExHeader, Marshal.SizeOf(_sysExHeader)));
}
private void PrepareSysExBuffer()
{
var header = new MidiWinApi.MIDIHDR
{
lpData = Marshal.AllocHGlobal(SysExBufferLength),
dwBufferLength = SysExBufferLength,
dwBytesRecorded = SysExBufferLength
};
_sysExHeaderPointer = Marshal.AllocHGlobal(MidiWinApi.MidiHeaderSize);
Marshal.StructureToPtr(header, _sysExHeaderPointer, false);
ProcessMmResult(MidiInWinApi.midiInPrepareHeader(_handle, _sysExHeaderPointer, MidiWinApi.MidiHeaderSize));
ProcessMmResult(MidiInWinApi.midiInAddBuffer(_handle, _sysExHeaderPointer, MidiWinApi.MidiHeaderSize));
}
private IntPtr PrepareSysExBuffer(byte[] data)
{
var bufferLength = data.Length + 1;
var dataPointer = Marshal.AllocHGlobal(bufferLength);
Marshal.WriteByte(dataPointer, EventStatusBytes.Global.NormalSysEx);
Marshal.Copy(data, 0, IntPtr.Add(dataPointer, 1), data.Length);
var header = new MidiWinApi.MIDIHDR
{
lpData = dataPointer,
dwBufferLength = bufferLength,
dwBytesRecorded = bufferLength
};
var headerPointer = Marshal.AllocHGlobal(MidiWinApi.MidiHeaderSize);
Marshal.StructureToPtr(header, headerPointer, false);
ProcessMmResult(MidiOutWinApi.midiOutPrepareHeader(_handle, headerPointer, MidiWinApi.MidiHeaderSize));
return(headerPointer);
}
public static extern MMRESULT midiInAddBuffer(IntPtr hMidiIn, ref MidiWinApi.MIDIHDR lpMidiInHdr, int cbMidiInHdr);
public static extern MMRESULT midiInUnprepareHeader(IntPtr hMidiIn, ref MidiWinApi.MIDIHDR lpMidiInHdr, int cbMidiInHdr);