CoreOSC is a small library designed to make interacting with Open Sound Control easy (OSC). It provides the following features:
- Produce an OSC Packet (messages and bundles) from .NET values.
- Translate an OSC message (consisting of a sequence of bytes) into a .NET object.
- Transmit OSC packets via UDP.
- Receive OSC packets via UDP.
CoreOSC is forked and converted from SharpOSC made by ValdermarOrn
The following OSC types are supported:
- i - int32 (System.Int32)
- f - float32 (System.Single)
- s - OSC-string (System.String)
- b - OSC-blob (System.Byte[])
- h - 64 bit big-endian two's complement integer (System.Int64)
- t - OSC-timetag (System.UInt64 / CoreOSC.Timetag)
- d - 64 bit ("double") IEEE 754 floating point number (System.Double)
- S - Alternate type represented as an OSC-string (for example, for systems that differentiate "symbols" from "strings") (CoreOSC.Symbol)
- c - an ascii character, sent as 32 bits (System.Char)
- r - 32 bit RGBA color (CoreOSC.RGBA)
- m - 4 byte MIDI message. Bytes from MSB to LSB are: port id, status byte, data1, data2 (CoreOSC.Midi)
- T - True. No bytes are allocated in the argument data. (System.Boolean)
- F - False. No bytes are allocated in the argument data. (System.Boolean)
- N - Nil. No bytes are allocated in the argument data. (null)
- I - Infinitum. No bytes are allocated in the argument data. (Double.PositiveInfinity)
- [ - Indicates the beginning of an array. The tags following are for data in the Array until a close brace tag is reached. (System.Object[] / List<object>)
- ] - Indicates the end of an array.
(Note that nested arrays (arrays within arrays) are not supported, the OSC specification is unclear about whether that it is even allowed)
CoreOSC is licensed under the MIT license.
See License.txt
To use the library add a reference to CoreOSC.dll in your .NET project. CoreOSC should now be available to use in your code under that namespace "CoreOSC".
class Program
{
static void Main(string[] args)
{
var message = new CoreOSC.OscMessage("/test/1", 23, 42.01f, "hello world");
var sender = new CoreOSC.UDPSender("127.0.0.1", 55555);
sender.Send(message);
}
}
This example sends an OSC message to the local machine on port 55555 containing 3 arguments: an integer with a value of 23, a floating point number with the value 42.01 and the string "hello world". If another program is listening to port 55555 it will receive the message and be able to use the data sent.
class Program
{
static void Main(string[] args)
{
var listener = new UDPListener(55555);
OscMessage messageReceived = null;
while (messageReceived == null)
{
messageReceived = (OscMessage)listener.Receive();
Thread.Sleep(1);
}
Console.WriteLine("Received a message!");
}
}
This shows a very simple way of waiting for incoming messages. The listener.Receive() method will check if the listener has received any new messages since it was last called. It will poll for a message every millisecond. If there is a new message that has not been returned it will assign messageReceived to point to that message. If no message has been received since the last call to Receive it will return null.
class Program
{
public void Main(string[] args)
{
// The cabllback function
HandleOscPacket callback = delegate(OscPacket packet)
{
var messageReceived = (OscMessage)packet;
Console.WriteLine("Received a message!");
};
var listener = new UDPListener(55555, callback);
Console.WriteLine("Press enter to stop");
Console.ReadLine();
listener.Close();
}
}
By giving UDPListener a callback you don't have to periodically check for incoming messages. The listener will simply invoke the callback whenever a message is received. You are free to implement any code you need inside the callback.
class Program
{
public void Main(string[] args)
{
// The cabllback function
HandleOscPacket callback = delegate(OscPacket packet)
{
var messageReceived = (OscMessage)packet;
Console.WriteLine("Received a message!");
};
var duplex = new UDPDuplex("remotehost.com",4444,55555, callback);
var message = new CoreOSC.OscMessage("/xremote");
duplex.Send(message);
Console.WriteLine("Press enter to stop");
Console.ReadLine();
duplex.Close();
}
}
UDPDuplex works like UDPListener for recieving messages and work like UDPSender for sending messages. in this case the remote machine is remotehost.com listening on port 4444 and this script listens and sends messages from port 5555.