/// <summary>
/// Returns true if the given long message describes a SysEx message.
/// </summary>
/// <param name="dwParam1">The dwParam1 arg passed to MidiInProc.</param>
/// <param name="dwParam2">The dwParam2 arg passed to MidiInProc.</param>
public static bool IsSysEx(UIntPtr dwParam1, UIntPtr dwParam2)
{
IntPtr newPtr = unchecked ((IntPtr)(long)(ulong)dwParam1); //http://stackoverflow.com/questions/3762113/how-can-an-uintptr-object-be-converted-to-intptr-in-c
Win32API.MIDIHDR header = (Win32API.MIDIHDR)System.Runtime.InteropServices.Marshal.PtrToStructure(newPtr, typeof(Win32API.MIDIHDR));
return(typeof(Win32API.MIDIHDR) == header.GetType());
}
/// <summary>
/// Decodes a SysEx long message.
/// </summary>
/// <param name="dwParam1">The dwParam1 arg passed to MidiInProc.</param>
/// <param name="dwParam2">The dwParam2 arg passed to MidiInProc.</param>
/// <param name="data">The SysEx data to send.</param>
/// <param name="timestamp">Filled in with the timestamp in microseconds since
/// midiInStart().</param>
public static void DecodeSysEx(UIntPtr dwParam1, UIntPtr dwParam2, out byte[] data, out UInt32 timestamp)
{
//if (!IsSysEx(dwParam1, dwParam2))
//{
// throw new ArgumentException("Not a SysEx message.");
//}
IntPtr newPtr = unchecked ((IntPtr)(long)(ulong)dwParam1); //http://stackoverflow.com/questions/3762113/how-can-an-uintptr-object-be-converted-to-intptr-in-c
Win32API.MIDIHDR header = (Win32API.MIDIHDR)System.Runtime.InteropServices.Marshal.PtrToStructure(newPtr, typeof(Win32API.MIDIHDR));
data = new byte[header.dwBytesRecorded];
for (int i = 0; i < header.dwBytesRecorded; i++)
{
//Array.Resize<byte>(ref data, data.Length + 1);
//data[data.Length - 1] = System.Runtime.InteropServices.Marshal.ReadByte(header.lpData, i);
data[i] = System.Runtime.InteropServices.Marshal.ReadByte(header.lpData, i);
}
timestamp = (UInt32)dwParam2;
}
