public void Send(byte [] mevent, int offset, int length, long timestamp)
{
foreach (var evt in MidiEvent.Convert(mevent, offset, length))
{
if (evt.StatusByte < 0xF0)
{
WinMMNatives.midiOutShortMsg(handle, (uint)(evt.StatusByte + (evt.Msb << 8) + (evt.Lsb << 16)));
}
else
{
MidiHdr sysex = default(MidiHdr);
unsafe
{
fixed(void *ptr = evt.Data)
{
sysex.Data = (IntPtr)ptr;
sysex.BufferLength = evt.Data.Length;
sysex.Flags = 0;
WinMMNatives.midiOutPrepareHeader(handle, ref sysex, (uint)Marshal.SizeOf(typeof(MidiHdr)));
WinMMNatives.midiOutLongMsg(handle, ref sysex, evt.Data.Length);
}
}
}
}
}
public void Send(byte [] mevent, int offset, int length, long timestamp)
{
foreach (var evt in MidiEvent.Convert(mevent, offset, length))
{
if (evt.StatusByte < 0xF0)
{
DieOnError(WinMMNatives.midiOutShortMsg(handle, (uint)(evt.StatusByte + (evt.Msb << 8) + (evt.Lsb << 16))));
}
else
{
var header = new MidiHdr();
bool prepared = false;
IntPtr ptr = IntPtr.Zero;
var hdrSize = Marshal.SizeOf(typeof(MidiHdr));
try
{
// allocate unmanaged memory and hand ownership over to the device driver
header.Data = Marshal.AllocHGlobal(evt.Data.Length);
header.BufferLength = evt.Data.Length;
Marshal.Copy(evt.Data, 0, header.Data, header.BufferLength);
ptr = Marshal.AllocHGlobal(hdrSize);
Marshal.StructureToPtr(header, ptr, false);
DieOnError(WinMMNatives.midiOutPrepareHeader(handle, ptr, hdrSize));
prepared = true;
DieOnError(WinMMNatives.midiOutLongMsg(handle, ptr, hdrSize));
}
finally
{
// reclaim ownership and free
if (prepared)
{
DieOnError(WinMMNatives.midiOutUnprepareHeader(handle, ptr, hdrSize));
}
if (header.Data != IntPtr.Zero)
{
Marshal.FreeHGlobal(header.Data);
}
if (ptr != IntPtr.Zero)
{
Marshal.FreeHGlobal(ptr);
}
}
}
}
}
public LongMessageBuffer(IntPtr inputHandle, int bufferSize = 4096)
{
this.inputHandle = inputHandle;
var header = new MidiHdr()
{
Data = Marshal.AllocHGlobal(bufferSize),
BufferLength = bufferSize,
};
try
{
Ptr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(MidiHdr)));
Marshal.StructureToPtr(header, Ptr, false);
}
catch
{
Free();
throw;
}
}
internal static extern int midiOutPrepareHeader(IntPtr handle, ref MidiHdr midiOutHdr, uint midiOutHdrSize);
internal static extern int midiOutLongMsg(IntPtr handle, ref MidiHdr midiOutHdr, int midiOutHdrSize);
