public void InClose()
{
int shdr = Marshal.SizeOf(typeof(MidiHeader));
IntPtr nhdr = Marshal.AllocHGlobal(shdr);
WinMM.midiInUnprepareHeader(inHandle, nhdr, shdr);
WinMM.midiInReset(inHandle);
WinMM.midiInStop(inHandle);
WinMM.midiInClose(inHandle);
}
private void GetInNames()
{
Console.WriteLine("In Devices: ");
MidiInCaps caps = new MidiInCaps();
for (int i = 0; i < WinMM.midiInGetNumDevs(); i++)
{
WinMM.midiInGetDevCaps(i, ref caps, Marshal.SizeOf(typeof(MidiInCaps)));
Console.WriteLine(caps.name);
}
}
public int OutOpen(string deviceName)
{
int result = -1;
int deviceID = GetOutIdByName(deviceName);
result = WinMM.midiOutOpen(ref outHandle, deviceID, null, 0, 0);
if (result != 0)
{
throw new Exception("Cannot open OUT device " + deviceName);
}
return(result);
}
public int SendMidi(byte[] midi)
{
int result = -1;
int msg = BitConverter.ToInt32(midi, 0); // convert byte[] to int
result = WinMM.midiOutShortMsg(outHandle, msg); // sending message
if (result != 0)
{
throw new Exception("Cannot send short message");
}
AfterShortSent?.Invoke(midi); // if not null Invoke
return(result);
}
public int InOpen(string deviceName)
{
int result = -1;
int deviceID = GetInIdByName(deviceName);
IntPtr pointer = Marshal.GetIUnknownForObject(this);
midiProc = new MidiProc(CallBack);
result = WinMM.midiInOpen(ref inHandle, deviceID, midiProc, pointer, CALLBACK_FUNCTION);
if (result != 0)
{
throw new Exception("MidiInOpen failed with code: " + result + ". Cannot open IN device " + deviceName);
}
AddSysexBuffer();
result = WinMM.midiInStart(inHandle);
if (result != 0)
{
throw new Exception("Cannot start IN device " + deviceName);
}
return(result);
}
private int GetOutIdByName(string deviceName)
{
MidiOutCaps caps = new MidiOutCaps();
int deviceID = -1;
int num = WinMM.midiOutGetNumDevs();
for (int i = 0; i < num; i++)
{
WinMM.midiOutGetDevCaps(i, ref caps, Marshal.SizeOf(typeof(MidiOutCaps)));
if (caps.name == deviceName)
{
deviceID = i;
break;
}
}
if (deviceID == -1)
{
throw new Exception("Midi OUT device " + deviceName + " not found");
}
return(deviceID);
}
private int AddSysexBuffer()
{
int result = -1;
int shdr = Marshal.SizeOf(typeof(MidiHeader));
IntPtr nhdr = Marshal.AllocHGlobal(shdr);
header = new MidiHeader();
header.bufferLength = header.bytesRecorded = 128;
header.bytesRecorded = 0;
header.data = Marshal.AllocHGlobal(128);
header.flags = 0;
Marshal.StructureToPtr(header, nhdr, false);
result = WinMM.midiInPrepareHeader(inHandle, nhdr, shdr);
if (result != 0)
{
throw new Exception("Cannot prepare IN header");
}
result = WinMM.midiInAddBuffer(inHandle, nhdr, shdr);
if (result != 0)
{
throw new Exception("Cannot add IN buffer");
}
return(result);
}
public void OutClose()
{
WinMM.midiOutClose(outHandle);
}
