public void AddData(MidiData data)
{
//handle any special values
if (isSpecial(data.status))
{
int index = 11 - (int)data.status;
if (!activedata.ContainsKey(index))
{
activedata.Add(index, data);
}
else
{
activedata[index] = data;
}
}
else
{
if (activedata.ContainsKey(data.data1))
{
activedata[data.data1] = data;
}
else
{
activedata.Add(data.data1, data);
}
}
}
public static void SendData(uint port, MidiData data)
{
//cannot do anything with a dummy
if (data.status == MidiStatus.Dummy)
{
return;
}
SendRawData(port, data.rawData);
}
//On every frame, get current status of each midi device and store all its values.
void Update()
{
//Loop based on Keijiro Takahashi's implementation.
//https://github.com/keijiro/jp.keijiro.rtmidi/
if (_initialized)
{
//check if a device has been added/removed.
if (portCount != GetPortCount())
{
RestartDevices();
//if there are no devices available, quit
if (!_initialized)
{
return;
}
}
//allocate memory for messages
IntPtr messages = Marshal.AllocHGlobal(1024);
IntPtr size = Marshal.AllocHGlobal(4);
//loop for every device active
for (int i = 0; i < currdevices.Length; i++)
{
int currsize = 0;
//loop indefinitely
while (true)
{
//write max size for parameter (max size for a midi message is 1024 bytes)
Marshal.WriteInt32(size, 1024);
//get message and store timestamp
double timestamp = MidiInternal.rtmidi_in_get_message(currdevices[i].ptr, messages, size);
//parse size
currsize = Marshal.ReadInt32(size);
//if the message is empty, quit
if (currsize == 0)
{
break;
}
//store messages in array
byte[] m = new byte[currsize];
Marshal.Copy(messages, m, 0, currsize);
//
//parse message
//
//store new data
MidiData data;
//get status byte
byte status = m[0];
//store data
data = new MidiData((float)timestamp, //time since last midi message
(MidiStatus)((status >> 4)), //midi type (8-15 defined)
(status & 0x0F), //channel bit (0-15)
m[1], //data1 byte (stores midi note ID usually)
(currsize == 2) ? byte.MinValue : m[2], //data2 byte (sometimes this is 0 due to the length of the message)
m, //raw data of the message
i); //device port ID
//some devices for whatever reason have both note on and off to be the same value
//so note on/off status is based on velocity
if (data.status == MidiStatus.NoteOn || data.status == MidiStatus.NoteOff)
{
data.status = (data.data2 != 0) ? MidiStatus.NoteOn : MidiStatus.NoteOff;
}
//add data to the device
currdevices[i].AddData(data);
}
}
//deallocate pointers
Marshal.FreeHGlobal(size);
Marshal.FreeHGlobal(messages);
}
}
