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Using OpenTK/OpenAL to Develop Cross Platform DIS VOIP Application

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4.79/5 (8 votes)
15 Mar 2010BSD10 min read 45.2K   1.7K   24  
Application allows voice communications (VOIP) utilizing the Distributed Interactive Simulation protocol (IEEE 1278.1)
// Copyright (c) 1995-2009 held by the author(s).  All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
//  are met:
// 
//  * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the names of the Naval Postgraduate School (NPS)
//  Modeling Virtual Environments and Simulation (MOVES) Institute
// (http://www.nps.edu and http://www.MovesInstitute.org)
// nor the names of its contributors may be used to endorse or
//  promote products derived from this software without specific
// prior written permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// AS IS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.

using System;
using System.Collections.Generic;
using System.Text;
using System.Diagnostics;
using System.Xml.Serialization;
using DISnet.DataStreamUtilities;

namespace DIS1998net
{

    /**
     * Section 5.3.8.4. Actual transmission of intercome voice data. COMPLETE
     *
     * Copyright (c) 2008, MOVES Institute, Naval Postgraduate School. All rights reserved.
     * This work is licensed under the BSD open source license, available at https://www.movesinstitute.org/licenses/bsd.html
     *
     * @author DMcG
     * Modified for use with C#:
     * Peter Smith (Naval Air Warfare Center - Training Systems Division)
     */
    [Serializable]
    [XmlRoot]
    [XmlInclude(typeof(EntityID))]
    [XmlInclude(typeof(OneByteChunk))]
    public partial class IntercomSignalPdu : RadioCommunicationsFamilyPdu
    {
        /** entity ID */
        protected EntityID  _entityID = new EntityID(); 

        /** ID of communications device */
        protected ushort  _communicationsDeviceID;

        /** encoding scheme */
        protected ushort  _encodingScheme;

        /** tactical data link type */
        protected ushort  _tdlType;

        /** sample rate */
        protected uint  _sampleRate;

        /** data length */
        protected ushort  _dataLength;

        /** samples */
        protected ushort  _samples;

        /** data bytes */
        protected byte[] _data; 

        /** Constructor */
        ///<summary>
        ///Section 5.3.8.4. Actual transmission of intercome voice data. COMPLETE
        ///</summary>
        public IntercomSignalPdu()
        {
            PduType = (byte)31;
        }

        new public int getMarshalledSize()
        {
            int marshalSize = 0; 

            marshalSize = base.getMarshalledSize();
            marshalSize = marshalSize + _entityID.getMarshalledSize();  // _entityID
            marshalSize = marshalSize + 2;  // _communicationsDeviceID
            marshalSize = marshalSize + 2;  // _encodingScheme
            marshalSize = marshalSize + 2;  // _tdlType
            marshalSize = marshalSize + 4;  // _sampleRate
            marshalSize = marshalSize + 2;  // _dataLength
            marshalSize = marshalSize + 2;  // _samples
            marshalSize = marshalSize + _data.Length;

            return marshalSize;
        }


        ///<summary>
        ///entity ID
        ///</summary>
        public void setEntityID(EntityID pEntityID)
        { 
            _entityID = pEntityID;
        }

        ///<summary>
        ///entity ID
        ///</summary>
        public EntityID getEntityID()
        {
            return _entityID;
        }

        ///<summary>
        ///entity ID
        ///</summary>
        [XmlElement(Type= typeof(EntityID), ElementName="entityID")]
        public EntityID EntityID
        {
            get
            {
                return _entityID;
            }
            set
            {
                _entityID = value;
            }
        }

        ///<summary>
        ///ID of communications device
        ///</summary>
        public void setCommunicationsDeviceID(ushort pCommunicationsDeviceID)
        { 
            _communicationsDeviceID = pCommunicationsDeviceID;
        }

        [XmlElement(Type= typeof(ushort), ElementName="communicationsDeviceID")]
        public ushort CommunicationsDeviceID
        {
            get
            {
                return _communicationsDeviceID;
            }
            set
            {
                _communicationsDeviceID = value;
            }
        }

        ///<summary>
        ///encoding scheme
        ///</summary>
        public void setEncodingScheme(ushort pEncodingScheme)
        { 
            _encodingScheme = pEncodingScheme;
        }

        [XmlElement(Type= typeof(ushort), ElementName="encodingScheme")]
        public ushort EncodingScheme
        {
            get
            {
                return _encodingScheme;
            }
            set
            {
                _encodingScheme = value;
            }
        }

        ///<summary>
        ///tactical data link type
        ///</summary>
        public void setTdlType(ushort pTdlType)
        { 
            _tdlType = pTdlType;
        }

        [XmlElement(Type= typeof(ushort), ElementName="tdlType")]
        public ushort TdlType
        {
            get
            {
                return _tdlType;
            }
            set
            {
                _tdlType = value;
            }
        }

        ///<summary>
        ///sample rate
        ///</summary>
        public void setSampleRate(uint pSampleRate)
        { 
            _sampleRate = pSampleRate;
        }

        [XmlElement(Type= typeof(uint), ElementName="sampleRate")]
        public uint SampleRate
        {
            get
            {
                return _sampleRate;
            }
            set
            {
                _sampleRate = value;
            }
        }

        /// <summary>
        /// Note that setting this value will not change the marshalled value. The list whose length this describes is used for that purpose.
        /// The getdataLength method will also be based on the actual list length rather than this value. 
        /// The method is simply here for completeness and should not be used for any computations.
        /// </summary>
        public void setDataLength(ushort pDataLength)
        {
            _dataLength = pDataLength;
        }

        /// <summary>
        /// Note that setting this value will not change the marshalled value. The list whose length this describes is used for that purpose.
        /// The getdataLength method will also be based on the actual list length rather than this value. 
        /// The method is simply here for completeness and should not be used for any computations.
        /// </summary>
        [XmlElement(Type= typeof(ushort), ElementName="dataLength")]
        public ushort DataLength
        {
            get
            {
                return _dataLength;
            }
            set
            {
                _dataLength = value;
            }
        }

        ///<summary>
        ///samples
        ///</summary>
        public void setSamples(ushort pSamples)
        { 
            _samples = pSamples;
        }

        [XmlElement(Type= typeof(ushort), ElementName="samples")]
        public ushort Samples
        {
            get
            {
                return _samples;
            }
            set
            {
                _samples = value;
            }
        }

        ///<summary>
        ///data bytes
        ///</summary>
        public void setData(byte[] pData)
        {
            _data = pData;
        }

        ///<summary>
        ///data bytes
        ///</summary>
        public byte[] getData()
        {
            return _data;
        }

        ///<summary>
        ///data bytes
        ///</summary>
        [XmlElement(ElementName = "dataList", DataType = "hexBinary")]
        public byte[] Data
        {
            get
            {
                return _data;
            }
            set
            {
                _data = value;
            }
        }

        ///<summary>
        ///Automatically sets the length of the marshalled data, then calls the marshal method.
        ///</summary>
        new public void marshalAutoLengthSet(DataOutputStream dos)
        {
            //Set the length prior to marshalling data
            this.setLength((ushort)this.getMarshalledSize());
            this.marshal(dos);
        }

        ///<summary>
        ///Marshal the data to the DataOutputStream.  Note: Length needs to be set before calling this method
        ///</summary>
        new public void marshal(DataOutputStream dos)
        {
            base.marshal(dos);
            try
            {
                _entityID.marshal(dos);
                dos.writeUshort((ushort)_communicationsDeviceID);
                dos.writeUshort((ushort)_encodingScheme);
                dos.writeUshort((ushort)_tdlType);
                dos.writeUint((uint)_sampleRate);
                dos.writeUshort((ushort)_data.Length);
                dos.writeUshort((ushort)_samples);
                dos.writeByte (_data);
            } // end try
            catch(Exception e)
            {
                Trace.WriteLine(e);
                Trace.Flush();
            }
        } // end of marshal method

        new public void unmarshal(DataInputStream dis)
        {
            base.unmarshal(dis);

            try
            {
                _entityID.unmarshal(dis);
                _communicationsDeviceID = dis.readUshort();
                _encodingScheme = dis.readUshort();
                _tdlType = dis.readUshort();
                _sampleRate = dis.readUint();
                _dataLength = dis.readUshort();
                _samples = dis.readUshort();
                _data = dis.readByteArray(_dataLength);
            } // end try
            catch(Exception e)
            {
                Trace.WriteLine(e);
                Trace.Flush();
            }
        } // end of unmarshal method

        ///<summary>
        ///This allows for a quick display of PDU data.  The current format is unacceptable and only used for debugging.
        ///This will be modified in the future to provide a better display.  Usage: 
        ///pdu.GetType().InvokeMember("reflection", System.Reflection.BindingFlags.InvokeMethod, null, pdu, new object[] { sb });
        ///where pdu is an object representing a single pdu and sb is a StringBuilder.
        ///Note: The supplied Utilities folder contains a method called 'DecodePDU' in the PDUProcessor Class that provides this functionality
        ///</summary>
        new public void reflection(StringBuilder sb)
        {
            sb.Append("<IntercomSignalPdu>"  + System.Environment.NewLine);
            base.reflection(sb);
            try
            {
                sb.Append("<entityID>"  + System.Environment.NewLine);
                _entityID.reflection(sb);
                sb.Append("</entityID>"  + System.Environment.NewLine);
                sb.Append("<communicationsDeviceID type=\"ushort\">" + _communicationsDeviceID.ToString() + "</communicationsDeviceID> " + System.Environment.NewLine);
                sb.Append("<encodingScheme type=\"ushort\">" + _encodingScheme.ToString() + "</encodingScheme> " + System.Environment.NewLine);
                sb.Append("<tdlType type=\"ushort\">" + _tdlType.ToString() + "</tdlType> " + System.Environment.NewLine);
                sb.Append("<sampleRate type=\"uint\">" + _sampleRate.ToString() + "</sampleRate> " + System.Environment.NewLine);
                sb.Append("<data type=\"ushort\">" + _data.Length.ToString() + "</data> " + System.Environment.NewLine);
                sb.Append("<samples type=\"ushort\">" + _samples.ToString() + "</samples> " + System.Environment.NewLine);

            sb.Append("<data type=\"byte[]\">" + System.Environment.NewLine);
            foreach (byte b in _data) sb.Append(b.ToString("X2"));
                sb.Append("</data>" + System.Environment.NewLine);
                sb.Append("</IntercomSignalPdu>"  + System.Environment.NewLine);
            } // end try
            catch(Exception e)
            {
                Trace.WriteLine(e);
                Trace.Flush();
            }
        } // end of reflection method

        public static bool operator !=(IntercomSignalPdu a, IntercomSignalPdu b)
        {
            return !(a == b);
        }

        public static bool operator ==(IntercomSignalPdu a, IntercomSignalPdu b)
        {
            if (System.Object.ReferenceEquals(a, b))
            {
                return true;
            }

            if (((object)a == null) || ((object)b == null))
            {
                return false;
            }

            return a.equals(b);
        }


        public override bool Equals(object obj)
        {
            return this == obj as IntercomSignalPdu;
        }


        /**
         * Compares for reference equality and value equality.
         */
        public bool equals(IntercomSignalPdu rhs)
        {
            bool ivarsEqual = true;

            if(rhs.GetType() != this.GetType())
                return false;

            ivarsEqual = base.Equals(rhs);

            if( ! (_entityID.Equals( rhs._entityID) )) ivarsEqual = false;
            if( ! (_communicationsDeviceID == rhs._communicationsDeviceID)) ivarsEqual = false;
            if( ! (_encodingScheme == rhs._encodingScheme)) ivarsEqual = false;
            if( ! (_tdlType == rhs._tdlType)) ivarsEqual = false;
            if( ! (_sampleRate == rhs._sampleRate)) ivarsEqual = false;
            if( ! (_dataLength == rhs._dataLength)) ivarsEqual = false;
            if( ! (_samples == rhs._samples)) ivarsEqual = false;
            if( ! ( _data.Equals(rhs._data))) ivarsEqual = false;

            return ivarsEqual;
        }

        /**
         * HashCode Helper
         */
        private int GenerateHash(int hash)
        {
            hash = hash << 5 + hash;
            return(hash);
        }


        /**
         * Return Hash
         */
        public override int GetHashCode()
        {
            int result = 0;

            result = GenerateHash(result) ^ base.GetHashCode();

            result = GenerateHash(result) ^ _entityID.GetHashCode();
            result = GenerateHash(result) ^ _communicationsDeviceID.GetHashCode();
            result = GenerateHash(result) ^ _encodingScheme.GetHashCode();
            result = GenerateHash(result) ^ _tdlType.GetHashCode();
            result = GenerateHash(result) ^ _sampleRate.GetHashCode();
            result = GenerateHash(result) ^ _dataLength.GetHashCode();
            result = GenerateHash(result) ^ _samples.GetHashCode();

            if(_data.Length > 0)
            {
                for(int idx = 0; idx < _data.Length; idx++)
                {
                    result = GenerateHash(result) ^ _data[idx].GetHashCode();
                }
            }


            return result;
        }
    } // end of class
} // end of namespace

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License

This article, along with any associated source code and files, is licensed under The BSD License


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