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Osc.cs
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Osc.cs
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using UnityEngine;
using System.Threading;
using System.Text;
using System.Collections;
using System.IO;
using System;
/// \mainpage
/// \section Overview
/// The .NET Visual C# library for the Make Controller Kit is designed
/// to make it as simple as possible for developers to integrate the
/// Make Controller Kit into their desktop applications, offering the
/// transparency that makes open source software so rewarding to work with.
/// You can communicate with the Make Controller Kit from your applications
/// over either an Ethernet or USB connection, or both. This library is
/// supplied both in source form and built, as MakeControllerOsc.dll
/// This document is a reference for MakeControllerOsc.
///
/// \section Communication
/// Messages to and from the board conform to the OSC (Open Sound Control) protocol.
/// OSC is an open, transport-independent standard supported by an increasing
/// number of environments and devices.
///
/// \subsection OSCmessages OSC Messages
/// OSC messages are represented by the class OscMessage, and consist of two elements:
/// - An address string for the device on the board you韗e dealing with.
/// - A list of value(s) being sent to or from that device. The list of values is optional.
///
/// From the perspective of OSC addresses, the Make Controller Kit is organized into a hierarchy of two or three layers:
/// - subsystems ?classes of device, such as analog inputs, servo controllers, and digital outputs.
/// - devices ?the index of a specific device within a subsystem.
/// If there is only one device in a subsystem, the device is not included in the OSC address.
/// - properties ?different devices have different properties, such as the value of an analog input,
/// the position of a servo motor, or the state of an LED.
///
/// OSC messages always begin with a slash, and use a slash to delimit each element in the address,
/// so an example OSC address string would look like:
/// \code /subsystem/device/property \endcode
///
/// The second part of an OscMessage is a list of values to be sent to the specified address.
/// The OSC types that are used by the Make Controller Kit for these values are integers,
/// floats, and strings. The values in this list are simply separated by spaces, and the
/// list can be arbitrarily long. Most devices on the Make Controller Kit expect only one value.
/// For example, to set the position of servo 1, you might send a message which
/// in string form might look like:
/// \code /servo/1/position 512 \endcode
///
/// This addressing scheme allows interactions with the board's various subsystems
/// and properties, and most importantly, accommodates the possibility of future or
/// custom devices on the board that have not yet been implemented or imagined.
/// If somebody creates, for example, a GPS extension to the board, communicating
/// with that device from this library is the same as for any other. More details
/// about OSC can be found at http://www.opensoundcontrol.org.
///
/// \section sendingdata Sending Data
/// As previously mentioned, the Make Controller Kit can communicate over both
/// Ethernet and USB. Messages are sent as packets, both over USB and UDP, and
/// corresponding structures are used ?UsbPacket and UdpPacket. Once you韛e created
/// a packet, you can simply call its Send() method, with the OscMessage you韉 like to send.
/// There are helper methods to create an OscMessage from a string, or you can pass in the OscMessage itself.
///
/// For example, you might set up your UsbSend() routine to look something like:
/// \code public void usbSend(string text)
/// {
/// OscMessage oscM = Osc.StringToOscMessage(text);
/// oscUsb is an Osc object, connected to a UsbPacket object
/// oscUsb.Send(oscM);
/// } \endcode
/// If your data is already in the form of an OscMessage, you can call oscUsb.Send() directly.
///
/// \section readingdata Reading Data
/// The Make Controller Kit must be polled in order to read data from it. To do this,
/// send an OscMessage with the address of the device you韉 like to read, but omit
/// the list of values. When the board receives an OscMessage with no value,
/// it interprets that as a read request, and sends back an OscMessage with the
/// current value at the appropriate address.
///
/// The .NET Make Controller Kit library conveniently provides handlers that will
/// call back a given function when an OscMessage with a given address string is received.
/// Your implementation could look something like:
/// \code// Set the handler in the constructor for a particular address
/// MyConstructor()
/// {
/// udpPacket = new UdpPacket();
/// oscUdp = new Osc(udpPacket);
/// // A thread is started when the Osc object is created to read
/// // incoming messages.
/// oscUdp.SetAddressHandler("/analogin/0/value", Ain0Message);
/// }
///
/// // The method you specified as the handler will be called back when a
/// // message with a matching address string comes back from the board.
/// public void AIn0Message(OscMessage oscMessage)
/// {
/// // write the message to a console, for example
/// mct.WriteLine("AIn0 > " + Osc.OscMessageToString(oscMessage));
/// } \endcode
/// You could alternatively set a handler for all incoming messages by calling
/// the SetAllMessageHandler() method in your setup, instead of SetAddressHandler().
///
///
//namespace MakingThings
//{
/// <summary>
/// The OscMessage class is a data structure that represents
/// an OSC address and an arbitrary number of values to be sent to that address.
/// </summary>
public class OscMessage
{
/// <summary>
/// The OSC address of the message as a string.
/// </summary>
public string Address;
/// <summary>
/// The list of values to be delivered to the Address.
/// </summary>
public ArrayList Values;
public OscMessage()
{
Values = new ArrayList();
}
}
public delegate void OscMessageHandler( OscMessage oscM );
/// <summary>
/// The Osc class provides the methods required to send, receive, and manipulate OSC messages.
/// Several of the helper methods are static since a running Osc instance is not required for
/// their use.
///
/// When instanciated, the Osc class opens the PacketIO instance that's handed to it and
/// begins to run a reader thread. The instance is then ready to service Send OscMessage requests
/// and to start supplying OscMessages as received back.
///
/// The Osc class can be called to Send either individual messages or collections of messages
/// in an Osc Bundle. Receiving is done by delegate. There are two ways: either submit a method
/// to receive all incoming messages or submit a method to handle only one particular address.
///
/// Messages can be encoded and decoded from Strings via the static methods on this class, or
/// can be hand assembled / disassembled since they're just a string (the address) and a list
/// of other parameters in Object form.
///
/// </summary>
public class Osc : MonoBehaviour
{
/// <summary>
/// Osc Constructor. Starts the Reader thread and initializes some internal state.
/// </summary>
/// <param name="oscPacketIO">The PacketIO instance used for packet IO.</param>
/*
public Osc(PacketIO oscPacketIO)
{
// Save the PacketExchage pointer
OscPacketIO = oscPacketIO;
// Create the hashtable for the address lookup mechanism
AddressTable = new Hashtable();
ReadThread = new Thread(Read);
ReaderRunning = true;
ReadThread.IsBackground = true;
ReadThread.Start();
}
*/
void Start() {
//do nothing, init must be called
}
public void init(UDPPacketIO oscPacketIO){
OscPacketIO = oscPacketIO;
// Create the hashtable for the address lookup mechanism
AddressTable = new Hashtable();
ReadThread = new Thread(Read);
ReaderRunning = true;
ReadThread.IsBackground = true;
ReadThread.Start();
}
/// <summary>
/// Make sure the PacketExchange is closed.
/// </summary>
~Osc()
{
//Cancel();
}
void OnDisable()
{
Debug.Log("OnDisable");
Cancel();
}
public void Cancel()
{
ReaderRunning = false;
ReadThread.Abort();
if (OscPacketIO.IsOpen())
OscPacketIO.Close();
}
/// <summary>
/// Read Thread. Loops waiting for packets. When a packet is received, it is
/// dispatched to any waiting All Message Handler. Also, the address is looked up and
/// any matching handler is called.
/// </summary>
private void Read()
{
while (ReaderRunning)
{
Debug.Log("Read");
byte[] buffer = new byte[1000];
int length = OscPacketIO.ReceivePacket(buffer);
if (length > 0)
{
ArrayList messages = Osc.PacketToOscMessages(buffer, length);
foreach (OscMessage om in messages)
{
if (AllMessageHandler != null)
AllMessageHandler(om);
OscMessageHandler h = (OscMessageHandler)Hashtable.Synchronized(AddressTable)[om.Address];
if (h != null)
h(om);
}
}
else
Thread.Sleep(500);
}
}
/// <summary>
/// Send an individual OSC message. Internally takes the OscMessage object and
/// serializes it into a byte[] suitable for sending to the PacketIO.
/// </summary>
/// <param name="oscMessage">The OSC Message to send.</param>
public void Send( OscMessage oscMessage )
{
byte[] packet = new byte[1000];
int length = Osc.OscMessageToPacket( oscMessage, packet, 1000 );
OscPacketIO.SendPacket( packet, length);
}
/// <summary>
/// Sends a list of OSC Messages. Internally takes the OscMessage objects and
/// serializes them into a byte[] suitable for sending to the PacketExchange.
/// </summary>
/// <param name="oms">The OSC Message to send.</param>
public void Send(ArrayList oms)
{
byte[] packet = new byte[1000];
int length = Osc.OscMessagesToPacket(oms, packet, 1000);
OscPacketIO.SendPacket(packet, length);
}
/// <summary>
/// Set the method to call back on when any message is received.
/// The method needs to have the OscMessageHandler signature - i.e. void amh( OscMessage oscM )
/// </summary>
/// <param name="amh">The method to call back on.</param>
public void SetAllMessageHandler(OscMessageHandler amh)
{
AllMessageHandler = amh;
}
/// <summary>
/// Set the method to call back on when a message with the specified
/// address is received. The method needs to have the OscMessageHandler signature - i.e.
/// void amh( OscMessage oscM )
/// </summary>
/// <param name="key">Address string to be matched</param>
/// <param name="ah">The method to call back on.</param>
public void SetAddressHandler(string key, OscMessageHandler ah)
{
Hashtable.Synchronized(AddressTable).Add(key, ah);
}
private UDPPacketIO OscPacketIO;
Thread ReadThread;
private bool ReaderRunning;
private OscMessageHandler AllMessageHandler;
Hashtable AddressTable;
/// <summary>
/// General static helper that returns a string suitable for printing representing the supplied
/// OscMessage.
/// </summary>
/// <param name="message">The OscMessage to be stringified.</param>
/// <returns>The OscMessage as a string.</returns>
public static string OscMessageToString(OscMessage message)
{
StringBuilder s = new StringBuilder();
s.Append(message.Address);
foreach( object o in message.Values )
{
s.Append(" ");
s.Append(o.ToString());
}
return s.ToString();
}
/// <summary>
/// Creates an OscMessage from a string - extracts the address and determines each of the values.
/// </summary>
/// <param name="message">The string to be turned into an OscMessage</param>
/// <returns>The OscMessage.</returns>
public static OscMessage StringToOscMessage(string message)
{
OscMessage oM = new OscMessage();
// Console.WriteLine("Splitting " + message);
string[] ss = message.Split(new char[] { ' ' });
IEnumerator sE = ss.GetEnumerator();
if (sE.MoveNext())
oM.Address = (string)sE.Current;
while ( sE.MoveNext() )
{
string s = (string)sE.Current;
// Console.WriteLine(" <" + s + ">");
if (s.StartsWith("\""))
{
StringBuilder quoted = new StringBuilder();
bool looped = false;
if (s.Length > 1)
quoted.Append(s.Substring(1));
else
looped = true;
while (sE.MoveNext())
{
string a = (string)sE.Current;
// Console.WriteLine(" q:<" + a + ">");
if (looped)
quoted.Append(" ");
if (a.EndsWith("\""))
{
quoted.Append(a.Substring(0, a.Length - 1));
break;
}
else
{
if (a.Length == 0)
quoted.Append(" ");
else
quoted.Append(a);
}
looped = true;
}
oM.Values.Add(quoted.ToString());
}
else
{
if (s.Length > 0)
{
try
{
int i = int.Parse(s);
// Console.WriteLine(" i:" + i);
oM.Values.Add(i);
}
catch
{
try
{
float f = float.Parse(s);
// Console.WriteLine(" f:" + f);
oM.Values.Add(f);
}
catch
{
// Console.WriteLine(" s:" + s);
oM.Values.Add(s);
}
}
}
}
}
return oM;
}
/// <summary>
/// Takes a packet (byte[]) and turns it into a list of OscMessages.
/// </summary>
/// <param name="packet">The packet to be parsed.</param>
/// <param name="length">The length of the packet.</param>
/// <returns>An ArrayList of OscMessages.</returns>
public static ArrayList PacketToOscMessages(byte[] packet, int length)
{
ArrayList messages = new ArrayList();
ExtractMessages(messages, packet, 0, length);
return messages;
}
/// <summary>
/// Puts an array of OscMessages into a packet (byte[]).
/// </summary>
/// <param name="messages">An ArrayList of OscMessages.</param>
/// <param name="packet">An array of bytes to be populated with the OscMessages.</param>
/// <param name="length">The size of the array of bytes.</param>
/// <returns>The length of the packet</returns>
public static int OscMessagesToPacket(ArrayList messages, byte[] packet, int length)
{
int index = 0;
if (messages.Count == 1)
index = OscMessageToPacket((OscMessage)messages[0], packet, 0, length);
else
{
// Write the first bundle bit
index = InsertString("#bundle", packet, index, length);
// Write a null timestamp (another 8bytes)
int c = 8;
while (( c-- )>0)
packet[index++]++;
// Now, put each message preceded by it's length
foreach (OscMessage oscM in messages)
{
int lengthIndex = index;
index += 4;
int packetStart = index;
index = OscMessageToPacket(oscM, packet, index, length);
int packetSize = index - packetStart;
packet[lengthIndex++] = (byte)((packetSize >> 24) & 0xFF);
packet[lengthIndex++] = (byte)((packetSize >> 16) & 0xFF);
packet[lengthIndex++] = (byte)((packetSize >> 8) & 0xFF);
packet[lengthIndex++] = (byte)((packetSize) & 0xFF);
}
}
return index;
}
/// <summary>
/// Creates a packet (an array of bytes) from a single OscMessage.
/// </summary>
/// <remarks>A convenience method, not requiring a start index.</remarks>
/// <param name="oscM">The OscMessage to be returned as a packet.</param>
/// <param name="packet">The packet to be populated with the OscMessage.</param>
/// <param name="length">The usable size of the array of bytes.</param>
/// <returns>The length of the packet</returns>
public static int OscMessageToPacket(OscMessage oscM, byte[] packet, int length)
{
return OscMessageToPacket(oscM, packet, 0, length);
}
/// <summary>
/// Creates an array of bytes from a single OscMessage. Used internally.
/// </summary>
/// <remarks>Can specify where in the array of bytes the OscMessage should be put.</remarks>
/// <param name="oscM">The OscMessage to be turned into an array of bytes.</param>
/// <param name="packet">The array of bytes to be populated with the OscMessage.</param>
/// <param name="start">The start index in the packet where the OscMessage should be put.</param>
/// <param name="length">The length of the array of bytes.</param>
/// <returns>The index into the packet after the last OscMessage.</returns>
private static int OscMessageToPacket(OscMessage oscM, byte[] packet, int start, int length)
{
int index = start;
index = InsertString(oscM.Address, packet, index, length);
//if (oscM.Values.Count > 0)
{
StringBuilder tag = new StringBuilder();
tag.Append(",");
int tagIndex = index;
index += PadSize(2 + oscM.Values.Count);
foreach (object o in oscM.Values)
{
if (o is int)
{
int i = (int)o;
tag.Append("i");
packet[index++] = (byte)((i >> 24) & 0xFF);
packet[index++] = (byte)((i >> 16) & 0xFF);
packet[index++] = (byte)((i >> 8) & 0xFF);
packet[index++] = (byte)((i) & 0xFF);
}
else
{
if (o is float)
{
float f = (float)o;
tag.Append("f");
byte[] buffer = new byte[4];
MemoryStream ms = new MemoryStream(buffer);
BinaryWriter bw = new BinaryWriter(ms);
bw.Write(f);
packet[index++] = buffer[3];
packet[index++] = buffer[2];
packet[index++] = buffer[1];
packet[index++] = buffer[0];
}
else
{
if (o is string)
{
tag.Append("s");
index = InsertString(o.ToString(), packet, index, length);
}
else
{
tag.Append("?");
}
}
}
}
InsertString(tag.ToString(), packet, tagIndex, length);
}
return index;
}
/// <summary>
/// Receive a raw packet of bytes and extract OscMessages from it. Used internally.
/// </summary>
/// <remarks>The packet may contain a OSC message or a bundle of messages.</remarks>
/// <param name="messages">An ArrayList to be populated with the OscMessages.</param>
/// <param name="packet">The packet of bytes to be parsed.</param>
/// <param name="start">The index of where to start looking in the packet.</param>
/// <param name="length">The length of the packet.</param>
/// <returns>The index after the last OscMessage read.</returns>
private static int ExtractMessages(ArrayList messages, byte[] packet, int start, int length)
{
int index = start;
switch ( (char)packet[ start ] )
{
case '/':
index = ExtractMessage( messages, packet, index, length );
break;
case '#':
string bundleString = ExtractString(packet, start, length);
if ( bundleString == "#bundle" )
{
// skip the "bundle" and the timestamp
index+=16;
while ( index < length )
{
int messageSize = ( packet[index++] << 24 ) + ( packet[index++] << 16 ) + ( packet[index++] << 8 ) + packet[index++];
/*int newIndex = */ExtractMessages( messages, packet, index, length );
index += messageSize;
}
}
break;
}
return index;
}
/// <summary>
/// Extracts a messages from a packet.
/// </summary>
/// <param name="messages">An ArrayList to be populated with the OscMessage.</param>
/// <param name="packet">The packet of bytes to be parsed.</param>
/// <param name="start">The index of where to start looking in the packet.</param>
/// <param name="length">The length of the packet.</param>
/// <returns>The index after the OscMessage is read.</returns>
private static int ExtractMessage(ArrayList messages, byte[] packet, int start, int length)
{
OscMessage oscM = new OscMessage();
oscM.Address = ExtractString(packet, start, length);
int index = start + PadSize(oscM.Address.Length+1);
string typeTag = ExtractString(packet, index, length);
index += PadSize(typeTag.Length + 1);
oscM.Values.Add(typeTag);
foreach (char c in typeTag)
{
switch (c)
{
case ',':
break;
case 's':
{
string s = ExtractString(packet, index, length);
index += PadSize(s.Length + 1);
oscM.Values.Add(s);
Debug.Log (s);
break;
}
case 'i':
{
int i = ( packet[index++] << 24 ) + ( packet[index++] << 16 ) + ( packet[index++] << 8 ) + packet[index++];
oscM.Values.Add(i);
break;
}
case 'f':
{
byte[] buffer = new byte[4];
buffer[3] = packet[index++];
buffer[2] = packet[index++];
buffer[1] = packet[index++];
buffer[0] = packet[index++];
MemoryStream ms = new MemoryStream(buffer);
BinaryReader br = new BinaryReader(ms);
float f = br.ReadSingle();
oscM.Values.Add(f);
break;
}
}
}
messages.Add( oscM );
//Debug.Log (oscM.Values);
return index;
}
/// <summary>
/// Removes a string from a packet. Used internally.
/// </summary>
/// <param name="packet">The packet of bytes to be parsed.</param>
/// <param name="start">The index of where to start looking in the packet.</param>
/// <param name="length">The length of the packet.</param>
/// <returns>The string</returns>
private static string ExtractString(byte[] packet, int start, int length)
{
StringBuilder sb = new StringBuilder();
int index = start;
while (packet[index] != 0 && index < length)
sb.Append((char)packet[index++]);
return sb.ToString();
}
private static string Dump(byte[] packet, int start, int length)
{
StringBuilder sb = new StringBuilder();
int index = start;
while (index < length)
sb.Append(packet[index++]+"|");
return sb.ToString();
}
/// <summary>
/// Inserts a string, correctly padded into a packet. Used internally.
/// </summary>
/// <param name="string">The string to be inserted</param>
/// <param name="packet">The packet of bytes to be parsed.</param>
/// <param name="start">The index of where to start looking in the packet.</param>
/// <param name="length">The length of the packet.</param>
/// <returns>An index to the next byte in the packet after the padded string.</returns>
private static int InsertString(string s, byte[] packet, int start, int length)
{
int index = start;
foreach (char c in s)
{
packet[index++] = (byte)c;
if (index == length)
return index;
}
packet[index++] = 0;
int pad = (s.Length+1) % 4;
if (pad != 0)
{
pad = 4 - pad;
while (pad-- > 0)
packet[index++] = 0;
}
return index;
}
/// <summary>
/// Takes a length and returns what it would be if padded to the nearest 4 bytes.
/// </summary>
/// <param name="rawSize">Original size</param>
/// <returns>padded size</returns>
private static int PadSize(int rawSize)
{
int pad = rawSize % 4;
if (pad == 0)
return rawSize;
else
return rawSize + (4 - pad);
}
}
//}