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This Java SoftPhone base on Peers

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/*
    This file is part of Peers, a java SIP softphone.

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    any later version.

    This program 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 General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see .
    
    Copyright 2007, 2008, 2009, 2010 Yohann Martineau 
 */

package net.sourceforge.peers.media;

import java.io.IOException;

import net.sourceforge.peers.Logger;
import net.sourceforge.peers.rtp.RFC3551;
import net.sourceforge.peers.rtp.RtpListener;
import net.sourceforge.peers.rtp.RtpPacket;
import net.sourceforge.peers.rtp.RtpSession;
import net.sourceforge.peers.sdp.Codec;

public class IncomingRtpReader implements RtpListener {

	private RtpSession rtpSession;
	private AbstractSoundManager soundManager;
	private Decoder decoder;

	public IncomingRtpReader(RtpSession rtpSession,
			AbstractSoundManager soundManager, Codec codec, Logger logger)
			throws IOException {
		logger.debug("playback codec:" + codec.toString().trim());
		this.rtpSession = rtpSession;
		this.soundManager = soundManager;
		switch (codec.getPayloadType()) {
		case RFC3551.PAYLOAD_TYPE_PCMU:
			decoder = new PcmuDecoder();
			break;
		case RFC3551.PAYLOAD_TYPE_PCMA:
			decoder = new PcmaDecoder();
			break;
		default:
			throw new RuntimeException("unsupported payload type");
		}
		rtpSession.addRtpListener(this);
	}

	public void start() {
		rtpSession.start();
	}

	@Override
	public void receivedRtpPacket(RtpPacket rtpPacket) {
		if (soundManager != null) {
			// add this logical for collect incoming DTMF
			soundManager.addIncomingDTMF(rtpPacket);
			
			byte[] rawBuf = decoder.process(rtpPacket.getData());
			soundManager.writeData(rawBuf, 0, rawBuf.length);
		}
	}

}