Add orx-osc extension

orx-osc/build.gradle

@@ -0,0 +1,5 @@
+dependencies {
+    def withoutSlf4j = { exclude group: 'org.slf4j' }
+
+    compile "com.illposed.osc:javaosc-core:0.6", withoutSlf4j
+}

orx-osc/src/main/kotlin/OSC.kt

@@ -0,0 +1,69 @@
+package org.openrndr.extra.osc
+
+import com.illposed.osc.OSCMessage
+import com.illposed.osc.OSCMessageListener
+import com.illposed.osc.messageselector.OSCPatternAddressMessageSelector
+import com.illposed.osc.transport.udp.OSCPort
+import com.illposed.osc.transport.udp.OSCPortIn
+import com.illposed.osc.transport.udp.OSCPortOut
+import java.net.InetAddress
+import java.net.PortUnreachableException
+
+private typealias OSCListener = Pair<OSCPatternAddressMessageSelector, OSCMessageListener>
+
+class OSC (
+        address: InetAddress = InetAddress.getLocalHost(),
+        portIn: Int = OSCPort.DEFAULT_SC_OSC_PORT,
+        portOut: Int = portIn
+) {
+    private val receiver: OSCPortIn = OSCPortIn(portIn)
+    private val sender: OSCPortOut = OSCPortOut(address, portOut)
+    private val listeners: MutableMap<String, OSCListener> = mutableMapOf()
+
+    fun <T> send(channel: String, vararg message: T) {
+        if (!sender.isConnected) sender.connect()
+
+        val msg = OSCMessage(channel, message.toList())
+
+        try {
+            sender.send(msg)
+        } catch (ex: Exception) {
+            when(ex) {
+                is PortUnreachableException -> System.err.println("Error: Could not connect to OUT port")
+                is IllegalStateException -> System.err.println("Error: Couldn't send message to channel: $channel")
+            }
+            // ex.printStackTrace() - Would rather keep this behind a debug flag
+        }
+    }
+
+    fun listen(channel: String, callback: (List<Any>) -> Unit) {
+        val selector = OSCPatternAddressMessageSelector(channel);
+
+        val cb = OSCMessageListener {
+            callback(it.message.arguments)
+        }
+
+        receiver.dispatcher.addListener(selector, cb)
+
+        listeners[channel] = Pair(selector, cb)
+
+        if (!receiver.isListening) this.startListening()
+    }
+
+    // Cannot be called inside a listener's callback
+    fun removeListener(channel: String?) {
+        val listener = listeners[channel]
+
+        if (listener != null) {
+            receiver.dispatcher.removeListener(listener.first, listener.second)
+        }
+    }
+
+    private fun startListening() {
+        receiver.dispatcher.isAlwaysDispatchingImmediately = true;
+
+        receiver.startListening()
+
+        if (receiver.isListening) println("OSC is listening..")
+    }
+}