edu.nps.moves.dis.SignalPdu Maven / Gradle / Ivy
package edu.nps.moves.dis;
import java.util.*;
import java.io.*;
/**
* Section 5.3.8.2. Detailed information about a radio transmitter. This PDU
* requires manually written code to complete. The encodingScheme field can be
* used in multiple ways, which requires hand-written code to finish. UNFINISHED
*
* Copyright (c) 2008-2016, 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
*/
public class SignalPdu extends RadioCommunicationsFamilyPdu implements Serializable {
/**
* ID of the entity that is the source of the communication, ie contains the
* radio
*/
protected EntityID entityId = new EntityID();
/**
* particular radio within an entity
*/
protected int radioId;
/**
* encoding scheme used, and enumeration
*/
protected int encodingScheme;
/**
* tdl type
*/
protected int tdlType;
/**
* sample rate
*/
protected long sampleRate;
/**
* length of data, in bits
*/
protected int dataLength;
/**
* number of samples. If the PDU contains encoded audio, this should be
* zero.
*/
protected int samples;
/**
* list of eight bit values. Must be padded to fall on a 32 bit boundary.
*/
protected byte[] data = new byte[0];
/**
* Constructor
*/
public SignalPdu() {
setPduType((short) 26);
}
public int getMarshalledSize() {
int marshalSize = 0;
marshalSize = super.getMarshalledSize();
marshalSize = marshalSize + entityId.getMarshalledSize(); // entityId
marshalSize = marshalSize + 2; // radioId
marshalSize = marshalSize + 2; // encodingScheme
marshalSize = marshalSize + 2; // tdlType
marshalSize = marshalSize + 4; // sampleRate
marshalSize = marshalSize + 2; // dataLength
marshalSize = marshalSize + 2; // samples
marshalSize = marshalSize + data.length;
switch (data.length % 4) {
case 0:
break;//No padding needed
case 1:
marshalSize = marshalSize + 3;
break;//adding 3 byte padding
case 2:
marshalSize = marshalSize + 2;
break;//adding 2 byte padding
case 3:
marshalSize = marshalSize + 1;
break;//adding 1 byte padding
}
return marshalSize;
}
public void setEntityId(EntityID pEntityId) {
entityId = pEntityId;
}
public EntityID getEntityId() {
return entityId;
}
public void setRadioId(int pRadioId) {
radioId = pRadioId;
}
public int getRadioId() {
return radioId;
}
public void setEncodingScheme(int pEncodingScheme) {
encodingScheme = pEncodingScheme;
}
public int getEncodingScheme() {
return encodingScheme;
}
public void setEncodingClass(int pEncodingClass) {
int newEncodingClass = 0;
int newEncodingScheme = 0;
// Save encoding class and create the encoding scheme
newEncodingClass = pEncodingClass << 14; // Move bits 0 - 1 to bit position 14 - 15
newEncodingScheme = newEncodingClass | this.getEncodingType();
this.setEncodingScheme(newEncodingScheme);
}
public int getEncodingClass() {
int extractEncodingClass = 0;
extractEncodingClass = this.getEncodingScheme() & 0xC000; // Lose bits 0 - 13
extractEncodingClass = extractEncodingClass >>> 14; // Move bits 14 - 15 to bit position 0 - 1
return extractEncodingClass;
}
public void setEncodingType(int pEncodingType) {
int newEncodingScheme = 0;
// Save encoding type and create the encoding scheme
newEncodingScheme = this.getEncodingScheme() & 0xC000;
newEncodingScheme = newEncodingScheme | pEncodingType;
this.setEncodingScheme(newEncodingScheme); //
}
public int getEncodingType() {
int extractEncodingType = 0;
extractEncodingType = this.getEncodingScheme() & 0x3FFF; // Lose bits 14 - 15
return extractEncodingType;
}
public void setNumberofTDLMessages(int pEncodingType) {
int newEncodingScheme = 0;
// Save number of TDLs and create the encoding scheme
newEncodingScheme = this.getEncodingScheme() & 0xC000; // Lose bits 0 - 13
newEncodingScheme = newEncodingScheme | pEncodingType;
this.setEncodingScheme(newEncodingScheme); //
}
public int getNumberofTDLMessages() {
int extractEncodingType = 0;
extractEncodingType = this.getEncodingScheme() & 0x3FFF; // Lose bits 14 - 15
return extractEncodingType;
}
public void setTdlType(int pTdlType) {
tdlType = pTdlType;
}
public int getTdlType() {
return tdlType;
}
public void setSampleRate(long pSampleRate) {
sampleRate = pSampleRate;
}
public long getSampleRate() {
return sampleRate;
}
public int getDataLength() {
return dataLength;
}
/**
* 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 java bean completeness.
*/
public void setDataLength(int pDataLength) {
dataLength = pDataLength;
}
public void setSamples(int pSamples) {
samples = pSamples;
}
public int getSamples() {
return samples;
}
public void setData(byte[] pData) {
data = pData;
}
public byte[] getData() {
return data;
}
/**
* Packs a Pdu into the ByteBuffer.
*
* @throws java.nio.BufferOverflowException if buff is too small
* @throws java.nio.ReadOnlyBufferException if buff is read only
* @see java.nio.ByteBuffer
* @param buff The ByteBuffer at the position to begin writing
* @since ??
*/
public void marshal(java.nio.ByteBuffer buff) {
super.marshal(buff);
entityId.marshal(buff);
buff.putShort((short) radioId);
buff.putShort((short) encodingScheme);
buff.putShort((short) tdlType);
buff.putInt((int) sampleRate);
buff.putShort((short) dataLength);
buff.putShort((short) samples);
int nrOfBytes = 0;
nrOfBytes = dataLength / Byte.SIZE;
buff.put(data);
int paddingBytes = nrOfBytes % 4;//Padding to hit 32 bit boundry
switch (paddingBytes) {
case 0:
break;//No padding needed
case 1:
buff.put((byte) 0);
buff.putShort((short) 0);
break;//adding 3 byte padding
case 2:
buff.putShort((short) 0);
break;//adding 2 byte padding
case 3:
buff.put((byte) 0);
break;//adding 1 byte padding
}
} // end of marshal method
/**
* Unpacks a Pdu from the underlying data.
*
* @throws java.nio.BufferUnderflowException if buff is too small
* @see java.nio.ByteBuffer
* @param buff The ByteBuffer at the position to begin reading
* @since ??
*/
public void unmarshal(java.nio.ByteBuffer buff) {
super.unmarshal(buff);
entityId.unmarshal(buff);
radioId = (int) (buff.getShort() & 0xFFFF);
encodingScheme = (int) (buff.getShort() & 0xFFFF);
tdlType = (int) (buff.getShort() & 0xFFFF);
sampleRate = buff.getInt();
dataLength = (int) (buff.getShort() & 0xFFFF);
samples = (int) (buff.getShort() & 0xFFFF);
final int dataLengthBytes = dataLength / Byte.SIZE;
data = new byte[dataLengthBytes];
buff.get(data);
} // end of unmarshal method
/*
* The equals method doesn't always work--mostly it works only on classes that consist only of primitives. Be careful.
*/
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
return equalsImpl(obj);
}
@Override
public boolean equalsImpl(Object obj) {
boolean ivarsEqual = true;
if (!(obj instanceof SignalPdu)) {
return false;
}
final SignalPdu rhs = (SignalPdu) obj;
if (!(entityId.equals(rhs.entityId))) {
ivarsEqual = false;
}
if (!(radioId == rhs.radioId)) {
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 (!(Arrays.equals(data, rhs.data))) {
ivarsEqual = false;
}
return ivarsEqual && super.equalsImpl(rhs);
}
} // end of class
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