/// <summary>
/// Sends a System Exclusive (sysex) message.
/// </summary>
/// <param name="data">The message to send (as byte array)</param>
/// <exception cref="DeviceException">The message cannot be sent.</exception>
public void SendSysEx(byte[] data)
{
lock (_lockObj)
{
//Win32API.MMRESULT result;
IntPtr ptr;
UInt32 size = (UInt32)System.Runtime.InteropServices.Marshal.SizeOf(typeof(Win32API.MIDIHDR));
Win32API.MIDIHDR header = new Win32API.MIDIHDR();
header.lpData = System.Runtime.InteropServices.Marshal.AllocHGlobal(data.Length);
for (int i = 0; i < data.Length; i++)
{
System.Runtime.InteropServices.Marshal.WriteByte(header.lpData, i, data[i]);
}
header.dwBufferLength = data.Length;
header.dwBytesRecorded = data.Length;
header.dwFlags = 0;
try
{
ptr = System.Runtime.InteropServices.Marshal.AllocHGlobal(System.Runtime.InteropServices.Marshal.SizeOf(typeof(Win32API.MIDIHDR)));
}
catch (Exception)
{
System.Runtime.InteropServices.Marshal.FreeHGlobal(header.lpData);
throw;
}
try
{
System.Runtime.InteropServices.Marshal.StructureToPtr(header, ptr, false);
}
catch (Exception)
{
System.Runtime.InteropServices.Marshal.FreeHGlobal(header.lpData);
System.Runtime.InteropServices.Marshal.FreeHGlobal(ptr);
throw;
}
//result = Win32API.midiOutPrepareHeader(handle, ptr, size);
//if (result == 0) result = Win32API.midiOutLongMsg(handle, ptr, size);
//if (result == 0) result = Win32API.midiOutUnprepareHeader(handle, ptr, size);
CheckReturnCode(Win32API.midiOutPrepareHeader(_handle, ptr, size));
CheckReturnCode(Win32API.midiOutLongMsg(_handle, ptr, size));
CheckReturnCode(Win32API.midiOutUnprepareHeader(_handle, ptr, size));
System.Runtime.InteropServices.Marshal.FreeHGlobal(header.lpData);
System.Runtime.InteropServices.Marshal.FreeHGlobal(ptr);
}
}
/// <summary>
/// Releases the resources associated with the specified MidiHeader pointer.
/// </summary>
/// <param name="ptr">
/// The pointer to MIDIHDR buffer.
/// </param>
private bool DestroyLongMsgBuffer(UIntPtr ptr)
{
IntPtr newPtr = unchecked ((IntPtr)(long)(ulong)ptr);
uint size = (uint)System.Runtime.InteropServices.Marshal.SizeOf(typeof(Win32API.MIDIHDR));
CheckReturnCode(Win32API.midiInUnprepareHeader(_handle, newPtr, size));
Win32API.MIDIHDR header = (Win32API.MIDIHDR)System.Runtime.InteropServices.Marshal.PtrToStructure(newPtr, typeof(Win32API.MIDIHDR));
System.Runtime.InteropServices.Marshal.FreeHGlobal(header.lpData);
System.Runtime.InteropServices.Marshal.FreeHGlobal(newPtr);
_longMsgBuffers.Remove(newPtr);
return(true);
}
private IntPtr CreateLongMsgBuffer()
{
//add a buffer so we can receive SysEx messages
IntPtr ptr;
uint size = (uint)System.Runtime.InteropServices.Marshal.SizeOf(typeof(Win32API.MIDIHDR));
Win32API.MIDIHDR header = new Win32API.MIDIHDR
{
lpData = System.Runtime.InteropServices.Marshal.AllocHGlobal(4096),
dwBufferLength = 4096,
dwFlags = 0
};
try
{
ptr = System.Runtime.InteropServices.Marshal.AllocHGlobal(System.Runtime.InteropServices.Marshal.SizeOf(typeof(Win32API.MIDIHDR)));
}
catch (Exception)
{
System.Runtime.InteropServices.Marshal.FreeHGlobal(header.lpData);
throw;
}
try
{
System.Runtime.InteropServices.Marshal.StructureToPtr(header, ptr, false);
}
catch (Exception)
{
System.Runtime.InteropServices.Marshal.FreeHGlobal(header.lpData);
System.Runtime.InteropServices.Marshal.FreeHGlobal(ptr);
throw;
}
CheckReturnCode(Win32API.midiInPrepareHeader(_handle, ptr, size));
CheckReturnCode(Win32API.midiInAddBuffer(_handle, ptr, size));
//CheckReturnCode(Win32API.midiInUnprepareHeader(handle, ptr, size));
return(ptr);
}
