/*
* JBoss, Home of Professional Open Source
* Copyright 2011, Red Hat, Inc. and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.restcomm.media.client.mgcp.parser.params;
import java.text.ParseException;
import org.restcomm.media.client.mgcp.parser.SplitDetails;
import org.restcomm.media.client.mgcp.parser.StringFunctions;
import org.restcomm.media.client.mgcp.parser.pkg.PackageNameHandler;
import jain.protocol.ip.mgcp.message.parms.CapabilityValue;
import jain.protocol.ip.mgcp.message.parms.ConnectionMode;
import jain.protocol.ip.mgcp.message.parms.LocalOptVal;
import jain.protocol.ip.mgcp.message.parms.LocalOptionValue;
import jain.protocol.ip.mgcp.message.parms.LocalOptionExtension;
import jain.protocol.ip.mgcp.message.parms.Bandwidth;
import jain.protocol.ip.mgcp.message.parms.CompressionAlgorithm;
import jain.protocol.ip.mgcp.message.parms.PacketizationPeriod;
import jain.protocol.ip.mgcp.message.parms.GainControl;
import jain.protocol.ip.mgcp.message.parms.EchoCancellation;
import jain.protocol.ip.mgcp.message.parms.EncryptionMethod;
import jain.protocol.ip.mgcp.message.parms.ResourceReservation;
import jain.protocol.ip.mgcp.message.parms.SilenceSuppression;
import jain.protocol.ip.mgcp.message.parms.SupportedPackages;
import jain.protocol.ip.mgcp.message.parms.SupportedModes;
import jain.protocol.ip.mgcp.message.parms.TypeOfService;
import jain.protocol.ip.mgcp.message.parms.TypeOfNetwork;
import jain.protocol.ip.mgcp.pkg.PackageName;
public class CapabilityHandler
{
public static CapabilityValue decode(byte[] value,int offset,int length) throws ParseException
{
if(length>1 && value[offset+1]==StringFunctions.COLON_BYTE)
{
switch(value[offset])
{
case StringFunctions.LOW_A_BYTE:
case StringFunctions.HIGH_A_BYTE:
return new LocalOptVal(CompressionAlgorithmHandler.decode(value,offset+2,length-2));
case StringFunctions.LOW_B_BYTE:
case StringFunctions.HIGH_B_BYTE:
return new LocalOptVal(BandwidthHandler.decode(value,offset+2,length-2));
case StringFunctions.LOW_E_BYTE:
case StringFunctions.HIGH_E_BYTE:
return new LocalOptVal(EchoCancellationHandler.decode(value,offset+2,length-2));
case StringFunctions.LOW_K_BYTE:
case StringFunctions.HIGH_K_BYTE:
return new LocalOptVal(EncryptionMethodHandler.decode(value,offset+2,length-2));
case StringFunctions.LOW_P_BYTE:
case StringFunctions.HIGH_P_BYTE:
return new LocalOptVal(PacketizationPeriodHandler.decode(value,offset+2,length-2));
case StringFunctions.LOW_R_BYTE:
case StringFunctions.HIGH_R_BYTE:
return new LocalOptVal(ResourceReservationHandler.decode(value,offset+2,length-2));
case StringFunctions.LOW_S_BYTE:
case StringFunctions.HIGH_S_BYTE:
return new LocalOptVal(SilenceSuppressionHandler.decode(value,offset+2,length-2));
case StringFunctions.LOW_T_BYTE:
case StringFunctions.HIGH_T_BYTE:
return new LocalOptVal(TypeOfServiceHandler.decode(value,offset+2,length-2));
case StringFunctions.LOW_V_BYTE:
case StringFunctions.HIGH_V_BYTE:
PackageName[] supportedPackageNames = PackageNameHandler.decodeList(value,offset+2,length-2);
return new SupportedPackages(supportedPackageNames);
case StringFunctions.LOW_M_BYTE:
case StringFunctions.HIGH_M_BYTE:
ConnectionMode[] supportedConnectionModes=ConnectionModeHandler.decodeList(value,offset+2,length-2);
return new SupportedModes(supportedConnectionModes);
}
}
else if(length>2 && value[offset+2]==StringFunctions.COLON_BYTE)
{
switch(value[offset])
{
case StringFunctions.LOW_N_BYTE:
case StringFunctions.HIGH_N_BYTE:
if(value[offset+1]==StringFunctions.LOW_T_BYTE || value[offset+1]==StringFunctions.HIGH_T_BYTE)
return new LocalOptVal(TypeOfNetworkHandler.decode(value,offset+3,length-3));
case StringFunctions.LOW_G_BYTE:
case StringFunctions.HIGH_G_BYTE:
if(value[offset+1]==StringFunctions.LOW_C_BYTE || value[offset+1]==StringFunctions.HIGH_C_BYTE)
return new LocalOptVal(GainControlHandler.decode(value,offset+3,length-3));
}
}
throw new ParseException("Could not parse capability: " + new String(value,offset,length), 0);
}
public static int encode(byte[] destination,int offset,CapabilityValue capabilityValue)
{
switch (capabilityValue.getCapabilityValueType())
{
case CapabilityValue.LOCAL_OPTION_VALUE:
LocalOptVal localOptVal = (LocalOptVal) capabilityValue;
LocalOptionValue localOptionValue = localOptVal.getLocalOptionValue();
return LocalOptionValueHandler.encode(destination,offset,localOptionValue);
case CapabilityValue.SUPPORTED_PACKAGES:
destination[offset]=StringFunctions.LOW_V_BYTE;
destination[offset+1]=StringFunctions.COLON_BYTE;
SupportedPackages supportedPackages = (SupportedPackages) capabilityValue;
PackageName[] packageNameList = supportedPackages.getSupportedPackageNames();
return PackageNameHandler.encodeList(destination,offset+2,packageNameList)+2;
case CapabilityValue.SUPPORTED_MODES:
destination[offset]=StringFunctions.LOW_M_BYTE;
destination[offset+1]=StringFunctions.COLON_BYTE;
SupportedModes supportedModes = (SupportedModes) capabilityValue;
ConnectionMode[] connectionModeList = supportedModes.getSupportedModes();
return ConnectionModeHandler.encodeList(destination,offset+2,connectionModeList)+2;
default:
return 0;
}
}
public static int encodeList(byte[] destination,int offset,CapabilityValue[] capabilitiesList)
{
if(capabilitiesList.length==0)
return 0;
int totalLength=0;
int i=0;
for(;i<capabilitiesList.length-1;i++)
{
totalLength+=encode(destination,offset+totalLength,capabilitiesList[i]);
destination[offset+totalLength]=StringFunctions.COMMA_BYTE;
totalLength++;
}
totalLength+=encode(destination,offset+totalLength,capabilitiesList[i]);
return totalLength;
}
public static CapabilityValue[] decodeList(byte[] value,int offset,int length) throws ParseException
{
SplitDetails[] splitDetails=StringFunctions.split(value,offset,length,StringFunctions.COMMA_BYTE);
CapabilityValue[] capabilities = new CapabilityValue[splitDetails.length];
for (int i = 0; i < splitDetails.length; i++)
capabilities[i] = decode(value,splitDetails[i].getOffset(),splitDetails[i].getLength());
return capabilities;
}
}