/// <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>
/// 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)Marshal.PtrToStructure(newPtr, typeof(Win32API.MIDIHDR));
// Replaced above line with below, due to deprecation
Win32API.MIDIHDR header = Marshal.PtrToStructure <Win32API.MIDIHDR>(newPtr);
return(typeof(Win32API.MIDIHDR) == header.GetType());
}
/// <summary>
/// Sends a System Exclusive (sysex) message to this MIDI output device.
/// </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 (this)
{
//Win32API.MMRESULT result;
IntPtr ptr;
UInt32 size = (UInt32)Marshal.SizeOf <Win32API.MIDIHDR>();
Win32API.MIDIHDR header = new Win32API.MIDIHDR
{
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(Marshal.SizeOf <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);
UInt32 size = (UInt32)Marshal.SizeOf <Win32API.MIDIHDR>();
CheckReturnCode(Win32API.midiInUnprepareHeader(handle, newPtr, size));
Win32API.MIDIHDR header = Marshal.PtrToStructure <Win32API.MIDIHDR>(newPtr);
System.Runtime.InteropServices.Marshal.FreeHGlobal(header.lpData);
System.Runtime.InteropServices.Marshal.FreeHGlobal(newPtr);
LongMsgBuffers.Remove(newPtr);
return(true);
}
/// <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;
}
private IntPtr CreateLongMsgBuffer()
{
//add a buffer so we can receive SysEx messages
IntPtr ptr;
UInt32 size = (UInt32)Marshal.SizeOf <Win32API.MIDIHDR>();
Win32API.MIDIHDR header = new Win32API.MIDIHDR
{
lpData = Marshal.AllocHGlobal(4096),
dwBufferLength = 4096,
dwFlags = 0
};
try
{
ptr = Marshal.AllocHGlobal(Marshal.SizeOf <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);
}
private IntPtr CreateLongMsgBuffer()
{
//add a buffer so we can receive SysEx messages
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(4096);
header.dwBufferLength = 4096;
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;
}
CheckReturnCode(Win32API.midiInPrepareHeader(handle, ptr, size));
CheckReturnCode(Win32API.midiInAddBuffer(handle, ptr, size));
//CheckReturnCode(Win32API.midiInUnprepareHeader(handle, ptr, size));
return ptr;
}
/// <summary>
/// Sends a System Exclusive (sysex) message to this MIDI output device.
/// </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 (this)
{
//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);
}
}
