/// <summary>
/// 5バイト以上のMIDIメッセージ(Long Message)を送信します。
/// </summary>
void SendLongMessage( byte [] data )
{
if ( data.Length > maxBufferSize )
{
throw new InvalidOperationException ();
}
MidiHdr hdr = new MidiHdr ();
hdr.dwReserved = new IntPtr [ 8 ];
GCHandle dataHandle = GCHandle.Alloc ( data, GCHandleType.Pinned );
try
{
hdr.lpData = dataHandle.AddrOfPinnedObject ();
hdr.dwBufferLength = (uint)data.Length;
hdr.dwFlags = 0;
SendBuffer ( hdr );
}
finally
{
dataHandle.Free ();
}
}
internal static extern MMResult midiOutUnprepareHeader( [MarshalAs ( UnmanagedType.SysUInt )] IntPtr hMidiOut, ref MidiHdr lpMidiOutHdr, [MarshalAs ( UnmanagedType.U4 )] uint uSize );
void SendBuffer( MidiHdr hdr )
{
MidiOutApi.midiOutPrepareHeader ( hMidiOut, ref hdr, hdrSize ).Throw ();
while ( ( hdr.dwFlags & MidiHdrFlag.Prepared ) != MidiHdrFlag.Prepared )
{
Thread.Sleep ( 1 );
}
MidiOutApi.midiOutLongMsg ( hMidiOut, ref hdr, hdrSize ).Throw ();
while ( ( hdr.dwFlags & MidiHdrFlag.Done ) != MidiHdrFlag.Done )
{
Thread.Sleep ( 1 );
}
MidiOutApi.midiOutUnprepareHeader ( hMidiOut, ref hdr, hdrSize ).Throw ();
}
